[add] fail fast options

NOTE: CI didn't work without explicitly specifying the branch.

.github/ISSUE_TEMPLATE.md

@@ -19,3 +19,5 @@ if you are using Neovim:
 #### expected behavior
 
 ????
+
+#### screen shot (if possible)

.github/workflows/ci.yml

@@ -0,0 +1,52 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+      - vim9script
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        vim_version:
+        - 'v8.2.1000'
+        - 'v8.2.0000'
+        - 'v8.1.0000'
+        - 'v8.0.0000'
+        - 'v7.4'
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@master
+
+    - name: Setup Ruby
+      uses: actions/setup-ruby@v1
+      with:
+        ruby-version: '2.6'
+
+    - name: Setup Bundle
+      run: |
+        gem install bundler
+        bundle install --jobs 4 --retry 3
+
+    - name: Setup Vim
+      uses: thinca/action-setup-vim@v1
+      with:
+        vim_version: ${{ matrix.vim_version }}
+
+    - name: Install Dependencies
+      run: | 
+        curl -f -L "https://raw.githubusercontent.com/vim-airline/vim-airline-themes/master/autoload/airline/themes/simple.vim" -o autoload/airline/themes/simple.vim
+        curl -f -L "https://raw.githubusercontent.com/vim-airline/vim-airline-themes/master/autoload/airline/themes/molokai.vim" -o autoload/airline/themes/molokai.vim
+        mkdir colors && curl -f -L 'https://raw.githubusercontent.com/tomasr/molokai/master/colors/molokai.vim' -o colors/molokai.vim
+
+    - name: Run Test
+      run: rake ci

.github/workflows/reviewdog.yml

@@ -0,0 +1,22 @@
+name: reviewdog
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  vint:
+    name: runner / vint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: vint
+        uses: reviewdog/action-vint@v1
+        with:
+          github_token: ${{ secrets.github_token }}
+          level: error
+          reporter: github-pr-check

.gitignore

@@ -1,4 +1,8 @@
+.DS_Store
 doc/tags
 *.lock
 .vim-flavor
 *.swp
+.bundle
+vendor
+

.travis.yml

@@ -1,8 +0,0 @@
-language: ruby
-before_install:
-  - curl -f -L "https://raw.githubusercontent.com/vim-airline/vim-airline-themes/master/autoload/airline/themes/simple.vim" -o autoload/airline/themes/simple.vim
-  - curl -f -L "https://raw.githubusercontent.com/vim-airline/vim-airline-themes/master/autoload/airline/themes/molokai.vim" -o autoload/airline/themes/molokai.vim
-  - mkdir colors && curl -f -L 'https://raw.githubusercontent.com/tomasr/molokai/master/colors/molokai.vim' -o colors/molokai.vim
-rvm:
-  - 1.9.3
-script: rake ci

CHANGELOG.md

@@ -2,7 +2,132 @@
 
 This is the Changelog for the vim-airline project.
 
-## [Unreleased]
+## [0.12] - Unreleased
+- New features
+  - Extensions:
+    - [poetv](https://github.com/petobens/poet-v) support
+    - [vim-lsp](https://github.com/prabirshrestha/vim-lsp) support
+    - [zoomwintab](https://github.com/troydm/zoomwintab.vim) support
+    - [Vaffle](https://github.com/cocopon/vaffle.vim) support
+    - [vim-dirvish](https://github.com/justinmk/vim-dirvish) support
+    - [fzf.vim](https://github.com/junegunn/fzf.vim) support
+    - [OmniSharp](https://github.com/OmniSharp/omnisharp-vim) support
+    - [searchcount](https://vim-jp.org/vimdoc-en/eval.html#searchcount())  support
+    - [fern.vim](https://github.com/lambdalisue/fern.vim) support
+    - [Vim-CMake](https://github.com/cdelledonne/vim-cmake) support
+    - [battery.vim](https://github.com/lambdalisue/battery.vim) support
+    - [nvim-lspconfig](https://github.com/neovim/nvim-lspconfig) support
+    - [gen_tags.vim](https://github.com/jsfaint/gen_tags.vim) support
+- Improvements
+  - git branch can also be displayed using [gina.vim](https://github.com/lambdalisue/gina.vim)
+  - coc extensions can also show additional status messages
+  - [coc-git](https://github.com/neoclide/coc-git) extension integrated into hunks extension
+- Other
+  - Introduce Vim script static analysis using [reviewdog](https://github.com/reviewdog/action-vint)
+  - Added multiple Vim versions to unit tests using Travis CI
+  - Added option to show short paths in the status line
+
+## [0.11] - 2019-11-10
+- New features
+  - Extensions:
+    - [Coc](https://github.com/neoclide/coc.nvim) support
+    - [Defx](https://github.com/Shougo/defx.nvim) support
+    - [gina](https://github.com/lambdalisue/gina.vim) support
+    - [vim-bookmark](https://github.com/MattesGroeger/vim-bookmarks) support
+    - [vista.vim](https://github.com/liuchengxu/vista.vim) support
+    - [tabws](https://github.com/s1341/vim-tabws) support for the tabline
+- Improvements
+  - The statusline can be configured to be shown on top (in the tabline)
+    Set the `g:airline_statusline_ontop` to enable this experimental feature.
+  - If `buffer_idx_mode=2`, up to 89 mappings will be exposed to access more
+    buffers directly (issue [#1823](https://github.com/vim-airline/vim-airline/issues/1823))
+  - Allow to use `random` as special theme name, which will switch to a random
+    airline theme (at least if a random number can be generated :()
+  - The branch extensions now also displays whether the repository is in a clean state
+    (will append a ! or ⚡if the repository is considered dirty).
+  - The whitespace extensions will also check for conflict markers
+  - `:AirlineRefresh` command now takes an additional `!` attribute, that **skips** 
+    recreating the highlighting groups (which might have a serious performance
+    impact if done very often, as might be the case when the configuration variable 
+    `airline_skip_empty_sections` is active).
+  - airline can now also detect multiple cursor mode (issue [#1933](https://github.com/vim-airline/vim-airline/issues/1933))
+  - expose hunks output using the function `airline#extensions#hunks#get_raw_hunks()` to the outside [#1877](https://github.com/vim-airline/vim-airline/pull/1877)
+  - expose wordcount affected filetype list to the public using the `airline#extensions#wordcount#filetypes` variable [#1887](https://github.com/vim-airline/vim-airline/pull/1887)
+  - for the `:AirlineExtension` command, indicate whether the extension has been loaded from an external source [#1890](https://github.com/vim-airline/vim-airline/issues/1890)
+  - correctly load custom wordcount formatters [#1896](https://github.com/vim-airline/vim-airline/issues/1896)
+  - add a new short_path formatter for the tabline [#1898](https://github.com/vim-airline/vim-airline/pull/1898)
+  - several improvements to the branch, denite and tabline extension, as well as the async code for Vim and Neovim
+  - the term extension supports [neoterm](https://github.com/kassio/neoterm) vim plugin
+
+## [0.10] - 2018-12-15
+- New features
+  - Extensions:
+    - [LanguageClient](https://github.com/autozimu/LanguageClient-neovim)
+    - [vim-gutentags](https://github.com/ludovicchabant/vim-gutentags)
+    - [vim-localsearch](https://github.com/mox-mox/vim-localsearch)
+    - [xtabline](https://github.com/mg979/vim-xtabline)
+    - [vim-grepper](https://github.com/mhinz/vim-grepper)
+  - Add custom AirlineModeChanged autocommand, allowing to call user defined commands
+    whenever airline displays a different mode
+  - New :AirlineExtensions command, to show which extensions have been loaded
+  - Detect several new modes (e.g. completion, virtual replace, etc)
+- Improvements
+  - Various performance improvements, should Vim keep responsive, even when
+    many highlighting groups need to be re-created
+  - Rework tabline extension
+  - Refactor [vim-ctrlspace](https://github.com/szw/vim-ctrlspace) extension
+  - Refactor the wordcount extension
+  - Reworked the po extension
+  - Allow to disable line numbers for the [Ale Extension](https://github.com/w0rp/ale)
+  - [fugitive](https://github.com/tpope/vim-fugitive) plugin has been refactored
+    causing adjustments for vim-airline, also uses Fugitives new API calls
+  - some improvements to Vims terminal mode
+  - Allow to use alternative seperators for inactive windows ([#1236](https://github.com/vim-airline/vim-airline/issues/1236))
+  - Statusline can be set to inactive, whenever Vim loses focus (using FocusLost autocommand)
+
+## [0.9] - 2018-01-15
+- Changes
+  - Look of default Airline Symbols has been improved [#1397](https://github.com/vim-airline/vim-airline/issues/1397)
+  - Airline does now set `laststatus=2` if needed
+  - Syntastic extension now displays warnings and errors separately
+  - Updates on Resize and SessionLoad events
+  - Add `maxlinenr` symbol to `airline_section_z`
+  - Add quickfix title to inactive windows
+- Improvements
+  - Many performance improvements (using caching and async feature when possible)
+  - Cache changes to highlighting groups if `g:airline_highlighting_cache = 1` is set
+  - Allow to skip empty sections by setting `g:airline_skip_empty_sections` variable
+  - Make use of improved Vim Script API, if available (e.g. getwininfo())
+  - Support for Vims terminal feature (very experimental since it hasn't been stabilized yet)
+  - More configuration for the tabline extension (with clickable buffers for Neovim)
+  - Works better on smaller window sizes
+  - Make airline aware of git worktrees
+  - Improvements to the fugitive extension [#1603](https://github.com/vim-airline/vim-airline/issues/1603)
+  - Allows for configurable fileformat output if `g:airline#parts#ffenc#skip_expected_string` is set
+  - Improvements to the documentation
+- New features
+  - Full async support for Vim 8 and Neovim
+  - Extensions:
+    - [vim-bufmru](https://github.com/mildred/vim-bufmru)
+    - [xkb-switch](https://github.com/ierton/xkb-switch)
+    - [input-source-switcher](https://github.com/vovkasm/input-source-switcher)
+    - [vimagit](https://github.com/jreybert/vimagit)
+    - [denite](https://github.com/Shougo/denite.nvim)
+    - [dein](https://github.com/Shougo/dein.vim)
+    - [vimtex](https://github.com/lervag/vimtex)
+    - [minpac](https://github.com/k-takata/minpac/)
+    - [vim-cursormode](https://github.com/vheon/vim-cursormode)
+    - [Neomake](https://github.com/neomake/neomake)
+    - [Ale](https://github.com/w0rp/ale)
+    - [vim-obsession](https://github.com/tpope/vim-obsession)
+    - spell (can also display Spell language)
+    - keymap
+  - Formatters:
+    - Formatters for JavaScript [#1617](https://github.com/vim-airline/vim-airline/issues/1617)
+    - Tabline: Allow for custom formatter for `tab_nr_type` [#1418](https://github.com/vim-airline/vim-airline/issues/1418)
+    - Customizable wordcount formatter [#1584](https://github.com/vim-airline/vim-airline/issues/1584)
+  - Add User autocommand for Theme changing [#1226](https://github.com/vim-airline/vim-airline/issues/1226)
+  - Shows mercurial mq status if hg mq extension is enabled
 
 ## [0.8] - 2016-03-09
 - Changes
@@ -21,7 +146,7 @@ This is the Changelog for the vim-airline project.
     - [taboo](https://github.com/gcmt/taboo.vim)
     - [vim-ctrlspace](https://github.com/szw/vim-ctrlspace)
     - [quickfixsigns](https://github.com/tomtom/quickfixsigns_vim)
-    - [YouCompleteMe](https://github.com/Valloric/YouCompleteMe)
+    - [YouCompleteMe](https://github.com/ycm-core/YouCompleteMe)
     - [po.vim](http://www.vim.org/scripts/script.php?script_id=695)
     - [unicode.vim](https://github.com/chrisbra/unicode.vim)
     - wordcount
@@ -109,7 +234,10 @@ This is the Changelog for the vim-airline project.
   - integration with other plugins: netrw, unite, nerdtree, undotree, gundo, tagbar, minibufexplr, ctrlp
   - support for themes: 8 included
 
-[Unreleased]: https://github.com/vim-airline/vim-airline/compare/v0.8...HEAD
+[0.12]: https://github.com/vim-airline/vim-airline/compare/v0.11...HEAD
+[0.11]: https://github.com/vim-airline/vim-airline/compare/v0.10...v0.11
+[0.10]: https://github.com/vim-airline/vim-airline/compare/v0.9...v0.10
+[0.9]: https://github.com/vim-airline/vim-airline/compare/v0.8...v0.9
 [0.8]: https://github.com/vim-airline/vim-airline/compare/v0.7...v0.8
 [0.7]: https://github.com/vim-airline/vim-airline/compare/v0.6...v0.7
 [0.6]: https://github.com/vim-airline/vim-airline/compare/v0.5...v0.6

CONTRIBUTING.md

@@ -4,17 +4,15 @@ Contributions and pull requests are welcome.  Please take note of the following
 
 *  Adhere to the existing style as much as possible; notably, 2 space indents and long-form keywords.
 *  Keep the history clean!  Squash your branches before you submit a pull request.  `pull --rebase` is your friend.
-*  Any changes to the core should be tested against Vim 7.2.
+*  Any changes to the core should be tested against Vim 7.4.
 
 # Bugs
 
 Tracking down bugs can take a very long time due to different configurations, versions, and operating systems.  To ensure a timely response, please help me out by doing the following:
 
-* Reproduce it with this [minivimrc][7] repository to rule out any configuration conflicts.  Even better, create a `gist` of your vimrc that is compatible with [pathogen][11].
-* And to make it easier to reproduce, please supply the following:
-  * the `:version` of vim
-  * the commit of vim-airline you're using
-  * the OS that you're using, including terminal emulator, GUI vs non-GUI
+* the `:version` of vim
+* the commit of vim-airline you're using
+* the OS that you're using, including terminal emulator, GUI vs non-GUI
 
 # Themes
 
@@ -26,7 +24,5 @@ Tracking down bugs can take a very long time due to different configurations, ve
 If you would like to take a more active role in improving vim-airline, please consider [becoming a maintainer][43].
 
 
-[7]: https://github.com/bling/minivimrc
-[11]: https://github.com/tpope/vim-pathogen
 [14]: https://github.com/vim-airline/vim-airline/wiki/Screenshots
 [43]: https://github.com/vim-airline/vim-airline/wiki/Becoming-a-Maintainer

Gemfile

@@ -1,2 +1,2 @@
 source 'https://rubygems.org'
-gem 'vim-flavor', '~> 1.1'
+gem 'vim-flavor', '~> 2.2.2'

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (C) 2013-2016 Bailey Ling
+Copyright (C) 2013-2020 Bailey Ling, Christian Brabandt, et al.
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the "Software"),

README.md

@@ -1,9 +1,63 @@
-# vim-airline [![Build Status](https://travis-ci.org/vim-airline/vim-airline.png)](https://travis-ci.org/vim-airline/vim-airline)
+# vim-airline [![Build Status](https://travis-ci.org/vim-airline/vim-airline.svg?branch=master)](https://travis-ci.org/vim-airline/vim-airline) [![Say Thanks!](https://img.shields.io/badge/Say%20Thanks-!-1EAEDB.svg)](https://saythanks.io/to/cb%40256bit.org) [![reviewdog](https://github.com/vim-airline/vim-airline/workflows/reviewdog/badge.svg?branch=master&event=push)](https://github.com/vim-airline/vim-airline/actions?query=workflow%3Areviewdog+event%3Apush+branch%3Amaster)
 
-Lean & mean status/tabline for vim that's light as air.
+Lean & mean status/tabline for vim that's light as air.
 
 ![img](https://github.com/vim-airline/vim-airline/wiki/screenshots/demo.gif)
 
+When the plugin is correctly loaded, there will be a nice statusline at the
+bottom of each vim window.
+
+That line consists of several sections, each one displaying some piece of
+information. By default (without configuration) this line will look like this:
+
+```
++-----------------------------------------------------------------------------+
+|~                                                                            |
+|~                                                                            |
+|~                     VIM - Vi IMproved                                      |
+|~                                                                            |
+|~                       version 8.2                                          |
+|~                    by Bram Moolenaar et al.                                |
+|~           Vim is open source and freely distributable                      |
+|~                                                                            |
+|~           type :h :q<Enter>          to exit                               |
+|~           type :help<Enter> or <F1>  for on-line help                      |
+|~           type :help version8<Enter> for version info                      |
+|~                                                                            |
+|~                                                                            |
++-----------------------------------------------------------------------------+
+| A | B |                     C                            X | Y | Z |  [...] |
++-----------------------------------------------------------------------------+
+```
+
+The statusline is the colored line at the bottom, which contains the sections
+(possibly in different colors):
+
+section|meaning (example)
+-------|------------------
+  A    | displays the mode + additional flags like crypt/spell/paste (INSERT)
+  B    | Environment status (VCS information - branch, hunk summary (master), [battery][61] level)
+  C    | filename + read-only flag (~/.vim/vimrc RO)
+  X    | filetype  (vim)
+  Y    | file encoding[fileformat] (utf-8[unix])
+  Z    | current position in the file
+ [...] | additional sections (warning/errors/statistics) from external plugins (e.g. YCM, syntastic, ...)
+
+The information in Section Z looks like this:
+
+`10% ☰ 10/100 ln : 20`
+
+This means:
+```
+10%     - 10 percent down the top of the file
+☰ 10    - current line 10
+/100 ln - of 100 lines
+: 20    - current column 20
+```
+
+For a better look, those sections can be colored differently, depending on various conditions
+(e.g. the mode or whether the current file is 'modified')
+
 # Features
 
 *  Tiny core written with extensibility in mind ([open/closed principle][8]).
@@ -12,11 +66,12 @@ Lean &amp; mean status/tabline for vim that's light as air.
    [undotree][17], [nerdtree][18], [tagbar][19], [vim-gitgutter][29],
    [vim-signify][30], [quickfixsigns][39], [syntastic][5], [eclim][34],
    [lawrencium][21], [virtualenv][31], [tmuxline][35], [taboo.vim][37],
-   [ctrlspace][38], [vim-bufmru][47], [vimagit][50], [denite][51] and more.
+   [ctrlspace][38], [vim-bufmru][47], [vimagit][50], [denite][51],
+   [vim.battery][61] and more.
 *  Looks good with regular fonts and provides configuration points so you can use unicode or powerline symbols.
-*  Optimized for speed; it loads in under a millisecond.
+*  Optimized for speed - loads in under a millisecond.
 *  Extensive suite of themes for popular color schemes including [solarized][23] (dark and light), [tomorrow][24] (all variants), [base16][32] (all variants), [molokai][25], [jellybeans][26] and others.
- Note these are now external to this plugin. See [below][46] for detail.
+ Note these are now external to this plugin. More details can be found in the [themes repository][46].
 *  Supports 7.2 as the minimum Vim version.
 *  The master branch tries to be as stable as possible, and new features are merged in only after they have gone through a [full regression test][33].
 *  Unit testing suite.
@@ -39,7 +94,7 @@ Plugin 'vim-airline/vim-airline'
 Plugin 'vim-airline/vim-airline-themes'
 ```
 
-See https://github.com/vim-airline/vim-airline-themes for more.
+See [vim-airline-themes][46] for more.
 
 ## Automatic truncation
 
@@ -62,6 +117,26 @@ Separators can be configured independently for the tabline, so here is how you c
     let g:airline#extensions#tabline#left_sep = ' '
     let g:airline#extensions#tabline#left_alt_sep = '|'
 
+In addition, you can also choose which path formatter airline uses. This affects how file paths are
+displayed in each individual tab as well as the current buffer indicator in the upper right.
+To do so, set the `formatter` field with:
+
+    let g:airline#extensions#tabline#formatter = 'default'
+
+Here is a complete list of formatters with screenshots:
+
+#### `default`
+![image](https://user-images.githubusercontent.com/2652762/34422844-1d005efa-ebe6-11e7-8053-c784c0da7ba7.png)
+
+#### `jsformatter`
+![image](https://user-images.githubusercontent.com/2652762/34422843-1cf6a4d2-ebe6-11e7-810a-07e6eb08de24.png)
+
+#### `unique_tail`
+![image](https://user-images.githubusercontent.com/2652762/34422841-1ce5b4ec-ebe6-11e7-86e9-3d45c876068b.png)
+
+#### `unique_tail_improved`
+![image](https://user-images.githubusercontent.com/2652762/34422842-1cee23f2-ebe6-11e7-962d-97e068873077.png)
+
 ## Seamless integration
 
 vim-airline integrates with a variety of plugins out of the box.  These extensions will be lazily loaded if and only if you have the other plugins installed (and of course you can turn them off).
@@ -84,7 +159,7 @@ vim-airline integrates with a variety of plugins out of the box.  These extensio
 #### [syntastic][5]
 ![image](https://f.cloud.github.com/assets/306502/962864/9824c484-04f7-11e3-9928-da94f8c7da5a.png)
 
-#### hunks ([vim-gitgutter][29] & [vim-signify][30])
+#### hunks ([vim-gitgutter][29] & [vim-signify][30] & [coc-git][59])
 ![image](https://f.cloud.github.com/assets/306502/995185/73fc7054-09b9-11e3-9d45-618406c6ed98.png)
 
 #### [vimagit][50]
@@ -108,6 +183,18 @@ vim-airline integrates with a variety of plugins out of the box.  These extensio
 #### [vimtex][53]
 ![image](https://cloud.githubusercontent.com/assets/1798172/25799740/e77d5c2e-33ee-11e7-8660-d34ce4c5f13f.png)
 
+#### [localsearch][54]
+![image](https://raw.githubusercontent.com/mox-mox/vim-localsearch/master/vim-airline-localsearch-indicator.png)
+
+#### [LanguageClient][57]
+![image](https://user-images.githubusercontent.com/9622/45275524-52f45c00-b48b-11e8-8b83-a66240b10747.gif)
+
+#### [Vim-CMake][60]
+![image](https://user-images.githubusercontent.com/24732205/87788512-c876a380-c83d-11ea-9ee3-5f639f986a8f.png)
+
+#### [vim.battery][61]
+![image](https://user-images.githubusercontent.com/1969470/94561399-368b0e00-0264-11eb-94a0-f6b67c73d422.png)
+
 ## Extras
 
 vim-airline also supplies some supplementary stand-alone extensions.  In addition to the tabline extension mentioned earlier, there is also:
@@ -115,6 +202,13 @@ vim-airline also supplies some supplementary stand-alone extensions.  In additio
 #### whitespace
 ![image](https://f.cloud.github.com/assets/306502/962401/2a75385e-04ef-11e3-935c-e3b9f0e954cc.png)
 
+### statusline on top
+The statusline can alternatively be drawn on top, making room for other plugins to use the statusline:
+The example shows a custom statusline setting, that imitates Vims default statusline, while allowing
+to call custom functions.  Use `:let g:airline_statusline_ontop=1` to enable it.
+
+![image](https://i.imgur.com/tW1lMRU.png)
+
 ## Configurable and extensible
 
 #### Fine-tuned configuration
@@ -159,16 +253,14 @@ This plugin follows the standard runtime path structure, and as such it can be i
 | [Plug][40] | `Plug 'vim-airline/vim-airline'` |
 | [VAM][22] | `call vam#ActivateAddons([ 'vim-airline' ])` |
 | [Dein][52] | `call dein#add('vim-airline/vim-airline')` |
-| [minpac][54] | `call minpac#add('vim-airline/vim-airline')` |
+| [minpac][55] | `call minpac#add('vim-airline/vim-airline')` |
+| pack feature (native Vim 8 package feature)| `git clone https://github.com/vim-airline/vim-airline ~/.vim/pack/dist/start/vim-airline`<br/>Remember to run `:helptags ~/.vim/pack/dist/start/vim-airline/doc` to generate help tags |
 | manual | copy all of the files into your `~/.vim` directory |
 
-# Configuration
+# Documentation
 
 `:help airline`
 
-The default setting of 'laststatus' is for the statusline to not appear until a split is created. If you want it to appear all the time, add the following to your vimrc:
-`set laststatus=2`
-
 # Integrating with powerline fonts
 
 For the nice looking powerline symbols to appear, you will need to install a patched font.  Instructions can be found in the official powerline [documentation][20].  Prepatched fonts can be found in the [powerline-fonts][3] repository.
@@ -181,7 +273,7 @@ Solutions to common problems can be found in the [Wiki][27].
 
 # Performance
 
-Whoa!  Everything got slow all of a sudden...
+Whoa! Everything got slow all of a sudden...
 
 vim-airline strives to make it easy to use out of the box, which means that by default it will look for all compatible plugins that you have installed and enable the relevant extension.
 
@@ -189,7 +281,11 @@ Many optimizations have been made such that the majority of users will not see a
 
 The [minivimrc][7] project has some helper mappings to troubleshoot performance related issues.
 
-If you don't want all the bells and whistles enabled by default, you can define a value for `g:airline_extensions`.  When this variable is defined, only the extensions listed will be loaded; an empty array would effectively disable all extensions.
+If you don't want all the bells and whistles enabled by default, you can define a value for `g:airline_extensions`.  When this variable is defined, only the extensions listed will be loaded; an empty array would effectively disable all extensions (e.g. `:let g:airline_extensions = []`).
+
+Also, you can enable caching of the various syntax highlighting groups. This will try to prevent some of the more expensive `:hi` calls in Vim, which seem to be expensive in the Vim core at the expense of possibly not being one hundred percent correct all the time (especially if you often change highlighting groups yourself using `:hi` commands). To set this up do `:let g:airline_highlighting_cache = 1`. A `:AirlineRefresh` will however clear the cache.
+
+In addition you might want to check out the [dark_minimal theme][56], which does not change highlighting groups once they are defined. Also please check the [FAQ][27] for more information on how to diagnose and fix the problem.
 
 # Screenshots
 
@@ -203,7 +299,7 @@ If you are interested in becoming a maintainer (we always welcome more maintaine
 
 # License
 
-MIT License. Copyright (c) 2013-2017 Bailey Ling & Contributors.
+[MIT License][58]. Copyright (c) 2013-2020 Bailey Ling & Contributors.
 
 [1]: https://github.com/Lokaltog/vim-powerline
 [2]: https://github.com/Lokaltog/powerline
@@ -222,7 +318,7 @@ MIT License. Copyright (c) 2013-2017 Bailey Ling & Contributors.
 [15]: https://github.com/techlivezheng/vim-plugin-minibufexpl
 [16]: https://github.com/sjl/gundo.vim
 [17]: https://github.com/mbbill/undotree
-[18]: https://github.com/scrooloose/nerdtree
+[18]: https://github.com/preservim/nerdtree
 [19]: https://github.com/majutsushi/tagbar
 [20]: https://powerline.readthedocs.org/en/master/installation.html#patched-fonts
 [21]: https://bitbucket.org/ludovicchabant/vim-lawrencium
@@ -242,7 +338,7 @@ MIT License. Copyright (c) 2013-2017 Bailey Ling & Contributors.
 [35]: https://github.com/edkolev/tmuxline.vim
 [36]: https://github.com/edkolev/promptline.vim
 [37]: https://github.com/gcmt/taboo.vim
-[38]: https://github.com/szw/vim-ctrlspace
+[38]: https://github.com/vim-ctrlspace/vim-ctrlspace
 [39]: https://github.com/tomtom/quickfixsigns_vim
 [40]: https://github.com/junegunn/vim-plug
 [41]: https://github.com/bling
@@ -250,7 +346,7 @@ MIT License. Copyright (c) 2013-2017 Bailey Ling & Contributors.
 [43]: https://github.com/vim-airline/vim-airline/wiki/Becoming-a-Maintainer
 [44]: https://github.com/mhartington
 [45]: https://github.com/vim-airline/vim-airline/commit/d7fd8ca649e441b3865551a325b10504cdf0711b
-[46]: https://github.com/vim-airline/vim-airline#themes
+[46]: https://github.com/vim-airline/vim-airline-themes#vim-airline-themes--
 [47]: https://github.com/mildred/vim-bufmru
 [48]: https://github.com/ierton/xkb-switch
 [49]: https://github.com/vovkasm/input-source-switcher
@@ -258,4 +354,11 @@ MIT License. Copyright (c) 2013-2017 Bailey Ling & Contributors.
 [51]: https://github.com/Shougo/denite.nvim
 [52]: https://github.com/Shougo/dein.vim
 [53]: https://github.com/lervag/vimtex
-[54]: https://github.com/k-takata/minpac/
+[54]: https://github.com/mox-mox/vim-localsearch
+[55]: https://github.com/k-takata/minpac/
+[56]: https://github.com/vim-airline/vim-airline-themes/blob/master/autoload/airline/themes/dark_minimal.vim
+[57]: https://github.com/autozimu/LanguageClient-neovim
+[58]: https://github.com/vim-airline/vim-airline/blob/master/LICENSE
+[59]: https://github.com/neoclide/coc-git
+[60]: https://github.com/cdelledonne/vim-cmake
+[61]: http://github.com/lambdalisue/battery.vim/

autoload/airline.vim

@@ -1,4 +1,4 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -7,6 +7,11 @@ let g:airline_statusline_funcrefs = get(g:, 'airline_statusline_funcrefs', [])
 
 let s:sections = ['a','b','c','gutter','x','y','z', 'error', 'warning']
 let s:inactive_funcrefs = []
+let s:contexts = {}
+let s:core_funcrefs = [
+      \ function('airline#extensions#apply'),
+      \ function('airline#extensions#default#apply') ]
+
 
 function! airline#add_statusline_func(name)
   call airline#add_statusline_funcref(function(a:name))
@@ -14,9 +19,7 @@ endfunction
 
 function! airline#add_statusline_funcref(function)
   if index(g:airline_statusline_funcrefs, a:function) >= 0
-    echohl WarningMsg
-    echo 'The airline statusline funcref '.string(a:function).' has already been added.'
-    echohl NONE
+    call airline#util#warning(printf('The airline statusline funcref "%s" has already been added.', string(a:function)))
     return
   endif
   call add(g:airline_statusline_funcrefs, a:function)
@@ -34,6 +37,7 @@ function! airline#add_inactive_statusline_func(name)
 endfunction
 
 function! airline#load_theme()
+  let g:airline_theme = get(g:, 'airline_theme', 'dark')
   if exists('*airline#themes#{g:airline_theme}#refresh')
     call airline#themes#{g:airline_theme}#refresh()
   endif
@@ -51,42 +55,63 @@ function! airline#load_theme()
   call airline#update_statusline()
 endfunction
 
-function! airline#switch_theme(name)
+" Load an airline theme
+function! airline#switch_theme(name, ...)
+  let silent = get(a:000, '0', 0)
+  " get all available themes
+  let themes = airline#util#themes('')
+  let err = 0
   try
-    let palette = g:airline#themes#{a:name}#palette "also lazy loads the theme
-    let g:airline_theme = a:name
-  catch
-    echohl WarningMsg | echo 'The specified theme cannot be found.' | echohl NONE
+    if index(themes, a:name) == -1
+      " Theme not available
+      if !silent
+        call airline#util#warning(printf('The specified theme "%s" cannot be found.', a:name))
+      endif
+      throw "not-found"
+      let err = 1
+    else
+      exe "ru autoload/airline/themes/". a:name. ".vim"
+      let g:airline_theme = a:name
+    endif
+  catch /^Vim/
+    " catch only Vim errors, not "not-found"
+    call airline#util#warning(printf('There is an error in theme "%s".', a:name))
+    if &vbs
+      call airline#util#warning(v:exception)
+    endif
+    let err = 1
+  endtry
+
+  if err
     if exists('g:airline_theme')
       return
     else
       let g:airline_theme = 'dark'
     endif
-  endtry
+  endif
 
-  let w:airline_lastmode = ''
+  unlet! w:airline_lastmode
   call airline#load_theme()
 
-  silent doautocmd User AirlineAfterTheme
+  call airline#util#doautocmd('AirlineAfterTheme')
 
   " this is required to prevent clobbering the startup info message, i don't know why...
   call airline#check_mode(winnr())
 endfunction
 
+" Try to load the right theme for the current colorscheme
 function! airline#switch_matching_theme()
   if exists('g:colors_name')
     let existing = g:airline_theme
-    let theme = substitute(g:colors_name, '-', '_', 'g')
+    let theme = tr(tolower(g:colors_name), '-', '_')
     try
-      let palette = g:airline#themes#{theme}#palette
-      call airline#switch_theme(theme)
+      call airline#switch_theme(theme, 1)
       return 1
     catch
       for map in items(g:airline_theme_map)
         if match(g:colors_name, map[0]) > -1
           try
-            let palette = g:airline#themes#{map[1]}#palette
-            call airline#switch_theme(map[1])
+            call airline#switch_theme(map[1], 1)
           catch
             call airline#switch_theme(existing)
           endtry
@@ -98,71 +123,116 @@ function! airline#switch_matching_theme()
   return 0
 endfunction
 
+" Update the statusline
 function! airline#update_statusline()
-  if airline#util#getwinvar(winnr(), 'airline_disabled', 0)
+  if airline#util#stl_disabled(winnr())
     return
   endif
-  for nr in filter(range(1, winnr('$')), 'v:val != winnr()')
-    if airline#util#getwinvar(nr, 'airline_disabled', 0)
-      continue
-    endif
-    call setwinvar(nr, 'airline_active', 0)
-    let context = { 'winnr': nr, 'active': 0, 'bufnr': winbufnr(nr) }
-    call s:invoke_funcrefs(context, s:inactive_funcrefs)
-  endfor
+  let range = filter(range(1, winnr('$')), 'v:val != winnr()')
+  " create inactive statusline
+  call airline#update_statusline_inactive(range)
 
   unlet! w:airline_render_left w:airline_render_right
   exe 'unlet! ' 'w:airline_section_'. join(s:sections, ' w:airline_section_')
 
+  " Now create the active statusline
   let w:airline_active = 1
   let context = { 'winnr': winnr(), 'active': 1, 'bufnr': winbufnr(winnr()) }
   call s:invoke_funcrefs(context, g:airline_statusline_funcrefs)
 endfunction
 
-let s:contexts = {}
-let s:core_funcrefs = [
-      \ function('airline#extensions#apply'),
-      \ function('airline#extensions#default#apply') ]
+" Function to be called to make all statuslines inactive
+" Triggered on FocusLost autocommand
+function! airline#update_statusline_focuslost()
+  if get(g:, 'airline_focuslost_inactive', 0)
+    let bufnr=bufnr('%')
+    call airline#highlighter#highlight_modified_inactive(bufnr)
+    call airline#highlighter#highlight(['inactive'], bufnr)
+    call airline#update_statusline_inactive(range(1, winnr('$')))
+  endif
+endfunction
+
+" Function to draw inactive statuslines for inactive windows
+function! airline#update_statusline_inactive(range)
+  if airline#util#stl_disabled(winnr())
+    return
+  endif
+  for nr in a:range
+    if airline#util#stl_disabled(nr)
+      continue
+    endif
+    call setwinvar(nr, 'airline_active', 0)
+    let context = { 'winnr': nr, 'active': 0, 'bufnr': winbufnr(nr) }
+    if get(g:, 'airline_inactive_alt_sep', 0)
+      call extend(context, {
+            \ 'left_sep': g:airline_left_alt_sep,
+            \ 'right_sep': g:airline_right_alt_sep }, 'keep')
+    endif
+    call s:invoke_funcrefs(context, s:inactive_funcrefs)
+  endfor
+endfunction
+
+" Gather output from all funcrefs which will later be returned by the
+" airline#statusline() function
 function! s:invoke_funcrefs(context, funcrefs)
   let builder = airline#builder#new(a:context)
   let err = airline#util#exec_funcrefs(a:funcrefs + s:core_funcrefs, builder, a:context)
   if err == 1
     let a:context.line = builder.build()
     let s:contexts[a:context.winnr] = a:context
-    call setwinvar(a:context.winnr, '&statusline', '%!airline#statusline('.a:context.winnr.')')
+    let option = get(g:, 'airline_statusline_ontop', 0) ? '&tabline' : '&statusline'
+    call setwinvar(a:context.winnr, option, '%!airline#statusline('.a:context.winnr.')')
   endif
 endfunction
 
+" Main statusline function per window
+" will be set to the statusline option
 function! airline#statusline(winnr)
   if has_key(s:contexts, a:winnr)
     return '%{airline#check_mode('.a:winnr.')}'.s:contexts[a:winnr].line
   endif
-
   " in rare circumstances this happens...see #276
   return ''
 endfunction
 
+" Check if mode has changed
 function! airline#check_mode(winnr)
-  if !exists("s:airline_run")
-    let s:airline_run = 0
+  if !has_key(s:contexts, a:winnr)
+    return ''
   endif
-  let s:airline_run += 1
-
   let context = s:contexts[a:winnr]
 
   if get(w:, 'airline_active', 1)
-    let l:m = mode()
+    let l:m = mode(1)
     if l:m ==# "i"
       let l:mode = ['insert']
-    elseif l:m ==# "R"
+    elseif l:m[0] ==# "i"
+      let l:mode = ['insert']
+    elseif l:m ==# "Rv"
+      let l:mode =['replace']
+    elseif l:m[0] ==# "R"
       let l:mode = ['replace']
-    elseif l:m =~# '\v(v|V||s|S|)'
+    elseif l:m[0] =~# '\v(v|V||s|S|)'
       let l:mode = ['visual']
     elseif l:m ==# "t"
       let l:mode = ['terminal']
+    elseif l:m[0] ==# "c"
+      let l:mode = ['commandline']
+    elseif l:m ==# "no"   " does not work, most likely, Vim does not refresh the statusline in OP mode
+      let l:mode = ['normal']
+    elseif l:m[0:1] ==# 'ni'
+      let l:mode = ['insert']
+      let l:m = 'ni'
     else
       let l:mode = ['normal']
     endif
+    if exists("*VMInfos") && !empty(VMInfos())
+      " Vim plugin Multiple Cursors https://github.com/mg979/vim-visual-multi
+      let l:m = 'multi'
+    endif
+    if index(['Rv', 'no', 'ni', 'ix', 'ic', 'multi'], l:m) == -1
+      let l:m = l:m[0]
+    endif
     let w:airline_current_mode = get(g:airline_mode_map, l:m, l:m)
   else
     let l:mode = ['inactive']
@@ -190,18 +260,26 @@ function! airline#check_mode(winnr)
   endif
 
   let mode_string = join(l:mode)
-  if s:airline_run < 3
-    " skip this round.
-    " When this function is run too early after startup,
-    " it forces a redraw by vim which will remove the intro screen.
-    let w:airline_lastmode = mode_string
-    return ''
-  endif
   if get(w:, 'airline_lastmode', '') != mode_string
     call airline#highlighter#highlight_modified_inactive(context.bufnr)
-    call airline#highlighter#highlight(l:mode, context.bufnr)
+    call airline#highlighter#highlight(l:mode, string(context.bufnr))
+    call airline#util#doautocmd('AirlineModeChanged')
     let w:airline_lastmode = mode_string
   endif
 
   return ''
 endfunction
+
+function! airline#update_tabline()
+  if get(g:, 'airline_statusline_ontop', 0)
+    call airline#extensions#tabline#redraw()
+  endif
+endfunction
+
+function! airline#mode_changed()
+  " airline#visual_active
+  " Boolean: for when to get visual wordcount
+  " needed for the wordcount extension
+  let g:airline#visual_active = (mode() =~? '[vs]')
+  call airline#update_tabline()
+endfunction

autoload/airline/async.vim

@@ -0,0 +1,382 @@
+" MIT License. Copyright (c) 2013-2020 Christian Brabandt et al.
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+let s:untracked_jobs = {}
+let s:mq_jobs        = {}
+let s:po_jobs        = {}
+let s:clean_jobs     = {}
+
+" Generic functions handling on exit event of the various async functions
+function! s:untracked_output(dict, buf)
+  if a:buf =~? ('^'. a:dict.cfg['untracked_mark'])
+    let a:dict.cfg.untracked[a:dict.file] = get(g:, 'airline#extensions#branch#notexists', g:airline_symbols.notexists)
+  else
+    let a:dict.cfg.untracked[a:dict.file] = ''
+  endif
+endfunction
+
+" also called from branch extension (for non-async vims)
+function! airline#async#mq_output(buf, file)
+  let buf=a:buf
+  if !empty(a:buf)
+    if a:buf =~# 'no patches applied' ||
+      \ a:buf =~# "unknown command 'qtop'" ||
+      \ a:buf =~# "abort"
+      let buf = ''
+    elseif exists("b:mq") && b:mq isnot# buf
+      " make sure, statusline is updated
+      unlet! b:airline_head
+    endif
+    let b:mq = buf
+  endif
+  if has_key(s:mq_jobs, a:file)
+    call remove(s:mq_jobs, a:file)
+  endif
+endfunction
+
+function! s:po_output(buf, file)
+  if !empty(a:buf)
+    let b:airline_po_stats = printf("%s", a:buf)
+  else
+    let b:airline_po_stats = ''
+  endif
+  if has_key(s:po_jobs, a:file)
+    call remove(s:po_jobs, a:file)
+  endif
+endfunction
+
+function! s:valid_dir(dir)
+  if empty(a:dir) || !isdirectory(a:dir)
+    return getcwd()
+  endif
+  return a:dir
+endfunction
+
+function! airline#async#vcs_untracked(config, file, vcs)
+  if g:airline#init#vim_async
+    " Vim 8 with async support
+    noa call airline#async#vim_vcs_untracked(a:config, a:file)
+  else
+    " nvim async or vim without job-feature
+    noa call airline#async#nvim_vcs_untracked(a:config, a:file, a:vcs)
+  endif
+endfunction
+
+function! s:set_clean_variables(file, vcs, val)
+  let var=getbufvar(fnameescape(a:file), 'buffer_vcs_config', {})
+  if has_key(var, a:vcs) && has_key(var[a:vcs], 'dirty') &&
+        \ type(getbufvar(fnameescape(a:file), 'buffer_vcs_config')) == type({})
+    let var[a:vcs].dirty=a:val
+    try
+      call setbufvar(fnameescape(a:file), 'buffer_vcs_config', var)
+      unlet! b:airline_head
+    catch
+    endtry
+  endif
+endfunction
+
+function! s:set_clean_jobs_variable(vcs, file, id)
+  if !has_key(s:clean_jobs, a:vcs)
+    let s:clean_jobs[a:vcs] = {}
+  endif
+  let s:clean_jobs[a:vcs][a:file]=a:id
+endfunction
+
+function! s:on_exit_clean(...) dict abort
+  let buf=self.buf
+  call s:set_clean_variables(self.file, self.vcs, !empty(buf))
+  if has_key(get(s:clean_jobs, self.vcs, {}), self.file)
+    call remove(s:clean_jobs[self.vcs], self.file)
+  endif
+endfunction
+
+function! airline#async#vcs_clean(cmd, file, vcs)
+  if g:airline#init#vim_async
+    " Vim 8 with async support
+    noa call airline#async#vim_vcs_clean(a:cmd, a:file, a:vcs)
+  elseif has("nvim")
+    " nvim async
+    noa call airline#async#nvim_vcs_clean(a:cmd, a:file, a:vcs)
+  else
+    " Vim pre 8 using system()
+    call airline#async#vim7_vcs_clean(a:cmd, a:file, a:vcs)
+  endif
+endfunction
+
+if v:version >= 800 && has("job")
+  " Vim 8.0 with Job feature
+  " TODO: Check if we need the cwd option for the job_start() functions
+  "       (only works starting with Vim 8.0.0902)
+
+  function! s:on_stdout(channel, msg) dict abort
+    let self.buf .= a:msg
+  endfunction
+
+  function! s:on_exit_mq(channel) dict abort
+    call airline#async#mq_output(self.buf, self.file)
+  endfunction
+
+  function! s:on_exit_untracked(channel) dict abort
+    call s:untracked_output(self, self.buf)
+    if has_key(s:untracked_jobs, self.file)
+      call remove(s:untracked_jobs, self.file)
+    endif
+  endfunction
+
+  function! s:on_exit_po(channel) dict abort
+    call s:po_output(self.buf, self.file)
+    call airline#extensions#po#shorten()
+  endfunction
+
+  function! airline#async#get_mq_async(cmd, file)
+    if g:airline#init#is_windows && &shell =~ 'cmd\|powershell'
+      let cmd = a:cmd
+    else
+      let cmd = [&shell, &shellcmdflag, a:cmd]
+    endif
+
+    let options = {'cmd': a:cmd, 'buf': '', 'file': a:file}
+    if has_key(s:mq_jobs, a:file)
+      if job_status(get(s:mq_jobs, a:file)) == 'run'
+        return
+      elseif has_key(s:mq_jobs, a:file)
+        call remove(s:mq_jobs, a:file)
+      endif
+    endif
+    let id = job_start(cmd, {
+          \ 'err_io':   'out',
+          \ 'out_cb':   function('s:on_stdout', options),
+          \ 'close_cb': function('s:on_exit_mq', options)})
+    let s:mq_jobs[a:file] = id
+  endfunction
+
+  function! airline#async#get_msgfmt_stat(cmd, file)
+    if !executable('msgfmt')
+      " no msgfmt
+      return
+    endif
+    if g:airline#init#is_windows
+      let cmd = 'cmd /C ' . a:cmd. shellescape(a:file)
+    else
+      let cmd = ['sh', '-c', a:cmd. shellescape(a:file)]
+    endif
+
+    let options = {'buf': '', 'file': a:file}
+    if has_key(s:po_jobs, a:file)
+      if job_status(get(s:po_jobs, a:file)) == 'run'
+        return
+      elseif has_key(s:po_jobs, a:file)
+        call remove(s:po_jobs, a:file)
+      endif
+    endif
+    let id = job_start(cmd, {
+          \ 'err_io':   'out',
+          \ 'out_cb':   function('s:on_stdout', options),
+          \ 'close_cb': function('s:on_exit_po', options)})
+    let s:po_jobs[a:file] = id
+  endfunction
+
+  function! airline#async#vim_vcs_clean(cmd, file, vcs)
+    if g:airline#init#is_windows && &shell =~ 'cmd\|powershell'
+      let cmd = a:cmd
+    else
+      let cmd = [&shell, &shellcmdflag, a:cmd]
+    endif
+
+    let options = {'buf': '', 'vcs': a:vcs, 'file': a:file}
+    let jobs = get(s:clean_jobs, a:vcs, {})
+    if has_key(jobs, a:file)
+      if job_status(get(jobs, a:file)) == 'run'
+        return
+      elseif has_key(jobs, a:file)
+        " still running
+        return
+        " jobs dict should be cleaned on exit, so not needed here
+        " call remove(jobs, a:file)
+      endif
+    endif
+    let id = job_start(cmd, {
+          \ 'err_io':   'null',
+          \ 'out_cb':   function('s:on_stdout', options),
+          \ 'close_cb': function('s:on_exit_clean', options)})
+    call s:set_clean_jobs_variable(a:vcs, a:file, id)
+  endfunction
+
+  function! airline#async#vim_vcs_untracked(config, file)
+    if g:airline#init#is_windows && &shell =~ 'cmd\|powershell'
+      let cmd = a:config['cmd'] . shellescape(a:file)
+    else
+      let cmd = [&shell, &shellcmdflag, a:config['cmd'] . shellescape(a:file)]
+    endif
+
+    let options = {'cfg': a:config, 'buf': '', 'file': a:file}
+    if has_key(s:untracked_jobs, a:file)
+      if job_status(get(s:untracked_jobs, a:file)) == 'run'
+        return
+      elseif has_key(s:untracked_jobs, a:file)
+        call remove(s:untracked_jobs, a:file)
+      endif
+    endif
+    let id = job_start(cmd, {
+          \ 'err_io':   'out',
+          \ 'out_cb':   function('s:on_stdout', options),
+          \ 'close_cb': function('s:on_exit_untracked', options)})
+    let s:untracked_jobs[a:file] = id
+  endfunction
+
+elseif has("nvim")
+  " NVim specific functions
+
+  function! s:nvim_output_handler(job_id, data, event) dict
+    if a:event == 'stdout' || a:event == 'stderr'
+      let self.buf .=  join(a:data)
+    endif
+  endfunction
+
+  function! s:nvim_untracked_job_handler(job_id, data, event) dict
+    if a:event == 'exit'
+      call s:untracked_output(self, self.buf)
+      if has_key(s:untracked_jobs, self.file)
+        call remove(s:untracked_jobs, self.file)
+      endif
+    endif
+  endfunction
+
+  function! s:nvim_mq_job_handler(job_id, data, event) dict
+    if a:event == 'exit'
+      call airline#async#mq_output(self.buf, self.file)
+    endif
+  endfunction
+
+  function! s:nvim_po_job_handler(job_id, data, event) dict
+    if a:event == 'exit'
+      call s:po_output(self.buf, self.file)
+      call airline#extensions#po#shorten()
+    endif
+  endfunction
+
+  function! airline#async#nvim_get_mq_async(cmd, file)
+    let config = {
+    \ 'buf': '',
+    \ 'file': a:file,
+    \ 'cwd': s:valid_dir(fnamemodify(a:file, ':p:h')),
+    \ 'on_stdout': function('s:nvim_output_handler'),
+    \ 'on_stderr': function('s:nvim_output_handler'),
+    \ 'on_exit': function('s:nvim_mq_job_handler')
+    \ }
+    if g:airline#init#is_windows && &shell =~ 'cmd\|powershell'
+      let cmd = a:cmd
+    else
+      let cmd = [&shell, &shellcmdflag, a:cmd]
+    endif
+
+    if has_key(s:mq_jobs, a:file)
+      call remove(s:mq_jobs, a:file)
+    endif
+    let id = jobstart(cmd, config)
+    let s:mq_jobs[a:file] = id
+  endfunction
+
+  function! airline#async#nvim_get_msgfmt_stat(cmd, file)
+    let config = {
+    \ 'buf': '',
+    \ 'file': a:file,
+    \ 'cwd': s:valid_dir(fnamemodify(a:file, ':p:h')),
+    \ 'on_stdout': function('s:nvim_output_handler'),
+    \ 'on_stderr': function('s:nvim_output_handler'),
+    \ 'on_exit': function('s:nvim_po_job_handler')
+    \ }
+    if g:airline#init#is_windows && &shell =~ 'cmd\|powershell'
+      " no msgfmt on windows?
+      return
+    else
+      let cmd = [&shell, &shellcmdflag, a:cmd. shellescape(a:file)]
+    endif
+
+    if has_key(s:po_jobs, a:file)
+      call remove(s:po_jobs, a:file)
+    endif
+    let id = jobstart(cmd, config)
+    let s:po_jobs[a:file] = id
+  endfunction
+
+  function! airline#async#nvim_vcs_clean(cmd, file, vcs)
+    let config = {
+    \ 'buf': '',
+    \ 'vcs': a:vcs,
+    \ 'file': a:file,
+    \ 'cwd': s:valid_dir(fnamemodify(a:file, ':p:h')),
+    \ 'on_stdout': function('s:nvim_output_handler'),
+    \ 'on_stderr': function('s:nvim_output_handler'),
+    \ 'on_exit': function('s:on_exit_clean')}
+    if g:airline#init#is_windows && &shell =~ 'cmd\|powershell'
+      let cmd = a:cmd
+    else
+      let cmd = [&shell, &shellcmdflag, a:cmd]
+    endif
+
+    if !has_key(s:clean_jobs, a:vcs)
+      let s:clean_jobs[a:vcs] = {}
+    endif
+    if has_key(s:clean_jobs[a:vcs], a:file)
+      " still running
+      return
+      " jobs dict should be cleaned on exit, so not needed here
+      " call remove(s:clean_jobs[a:vcs], a:file)
+    endif
+    let id = jobstart(cmd, config)
+    call s:set_clean_jobs_variable(a:vcs, a:file, id)
+  endfunction
+
+endif
+
+" Should work in either Vim pre 8 or Nvim
+function! airline#async#nvim_vcs_untracked(cfg, file, vcs)
+  let cmd = a:cfg.cmd . shellescape(a:file)
+  let id = -1
+  let config = {
+  \ 'buf': '',
+  \ 'vcs': a:vcs,
+  \ 'cfg': a:cfg,
+  \ 'file': a:file,
+  \ 'cwd': s:valid_dir(fnamemodify(a:file, ':p:h'))
+  \ }
+  if has("nvim")
+    call extend(config, {
+    \ 'on_stdout': function('s:nvim_output_handler'),
+    \ 'on_exit': function('s:nvim_untracked_job_handler')})
+    if has_key(s:untracked_jobs, config.file)
+      " still running
+      return
+    endif
+    try
+    let id = jobstart(cmd, config)
+    catch
+      " catch-all, jobstart() failed, fall back to system()
+      let id=-1
+    endtry
+    let s:untracked_jobs[a:file] = id
+  endif
+  " vim without job feature or nvim jobstart failed
+  if id < 1
+    let output=system(cmd)
+    call s:untracked_output(config, output)
+    call airline#extensions#branch#update_untracked_config(a:file, a:vcs)
+  endif
+endfunction
+
+function! airline#async#vim7_vcs_clean(cmd, file, vcs)
+  " Vim pre 8, fallback using system()
+  " don't want to to see error messages
+  if g:airline#init#is_windows && &shell =~ 'cmd'
+    let cmd = a:cmd .' 2>nul'
+  elseif g:airline#init#is_windows && &shell =~ 'powerline'
+    let cmd = a:cmd .' 2> $null'
+  else
+    let cmd = a:cmd .' 2>/dev/null'
+  endif
+  let output=system(cmd)
+  call s:set_clean_variables(a:file, a:vcs, !empty(output))
+endfunction

autoload/airline/builder.vim

@@ -1,4 +1,4 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -22,7 +22,19 @@ function! s:prototype.add_raw(text) dict
   call add(self._sections, ['', a:text])
 endfunction
 
-function! s:get_prev_group(sections, i)
+function! s:prototype.insert_section(group, contents, position) dict
+  call insert(self._sections, [a:group, a:contents], a:position)
+endfunction
+
+function! s:prototype.insert_raw(text, position) dict
+  call insert(self._sections, ['', a:text], a:position)
+endfunction
+
+function! s:prototype.get_position() dict
+  return len(self._sections)
+endfunction
+
+function! airline#builder#get_prev_group(sections, i)
   let x = a:i - 1
   while x >= 0
     let group = a:sections[x][0]
@@ -34,6 +46,19 @@ function! s:get_prev_group(sections, i)
   return ''
 endfunction
 
+function! airline#builder#get_next_group(sections, i)
+  let x = a:i + 1
+  let l = len(a:sections)
+  while x < l
+    let group = a:sections[x][0]
+    if group != '' && group != '|'
+      return group
+    endif
+    let x = x + 1
+  endwhile
+  return ''
+endfunction
+
 function! s:prototype.build() dict
   let side = 1
   let line = ''
@@ -48,8 +73,10 @@ function! s:prototype.build() dict
     let group = section[0]
     let contents = section[1]
     let pgroup = prev_group
-    let prev_group = s:get_prev_group(self._sections, i)
-    if group ==# 'airline_c' && !self._context.active && has_key(self._context, 'bufnr')
+    let prev_group = airline#builder#get_prev_group(self._sections, i)
+    if group ==# 'airline_c' && &buftype ==# 'terminal' && self._context.active
+      let group = 'airline_term'
+    elseif group ==# 'airline_c' && !self._context.active && has_key(self._context, 'bufnr')
       let group = 'airline_c'. self._context.bufnr
     elseif prev_group ==# 'airline_c' && !self._context.active && has_key(self._context, 'bufnr')
       let prev_group = 'airline_c'. self._context.bufnr
@@ -100,30 +127,33 @@ function! s:prototype.build() dict
   return line
 endfunction
 
-function! s:should_change_group(group1, group2)
+function! airline#builder#should_change_group(group1, group2)
   if a:group1 == a:group2
     return 0
   endif
   let color1 = airline#highlighter#get_highlight(a:group1)
   let color2 = airline#highlighter#get_highlight(a:group2)
-  if g:airline_gui_mode ==# 'gui'
-    return color1[1] != color2[1] || color1[0] != color2[0]
-  else
-    return color1[3] != color2[3] || color1[2] != color2[2]
-  endif
+  return color1[1] != color2[1] || color1[0] != color2[0]
+      \ ||  color1[2] != color2[2] || color1[3] != color2[3]
 endfunction
 
 function! s:get_transitioned_seperator(self, prev_group, group, side)
   let line = ''
-  call airline#highlighter#add_separator(a:prev_group, a:group, a:side)
-  let line .= '%#'.a:prev_group.'_to_'.a:group.'#'
-  let line .= a:side ? a:self._context.left_sep : a:self._context.right_sep
-  let line .= '%#'.a:group.'#'
+  if get(a:self._context, 'tabline', 0) && get(g:, 'airline#extensions#tabline#alt_sep', 0) && a:group ==# 'airline_tabsel' && a:side
+    call airline#highlighter#add_separator(a:prev_group, a:group, 0)
+    let line .= '%#'.a:prev_group.'_to_'.a:group.'#'
+    let line .=  a:self._context.right_sep.'%#'.a:group.'#'
+  else
+    call airline#highlighter#add_separator(a:prev_group, a:group, a:side)
+    let line .= '%#'.a:prev_group.'_to_'.a:group.'#'
+    let line .= a:side ? a:self._context.left_sep : a:self._context.right_sep
+    let line .= '%#'.a:group.'#'
+  endif
   return line
 endfunction
 
 function! s:get_seperator(self, prev_group, group, side)
-  if s:should_change_group(a:prev_group, a:group)
+  if airline#builder#should_change_group(a:prev_group, a:group)
     return s:get_transitioned_seperator(a:self, a:prev_group, a:group, a:side)
   else
     return a:side ? a:self._context.left_alt_sep : a:self._context.right_alt_sep
@@ -132,6 +162,7 @@ endfunction
 
 function! s:get_accented_line(self, group, contents)
   if a:self._context.active
+    " active window
     let contents = []
     let content_parts = split(a:contents, '__accent')
     for cpart in content_parts
@@ -141,6 +172,7 @@ function! s:get_accented_line(self, group, contents)
     let line = join(contents, a:group)
     let line = substitute(line, '__restore__', a:group, 'g')
   else
+    " inactive window
     let line = substitute(a:contents, '%#__accent[^#]*#', '', 'g')
     let line = substitute(line, '%#__restore__#', '', 'g')
   endif
@@ -207,4 +239,3 @@ function! airline#builder#new(context)
         \ }, 'keep')
   return builder
 endfunction
-

autoload/airline/debug.vim

@@ -1,4 +1,4 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -49,4 +49,3 @@ function! airline#debug#profile3()
   profile pause
   noautocmd qall!
 endfunction
-

autoload/airline/extensions.vim

@@ -1,8 +1,9 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
 
+let s:loaded_ext = []
 let s:ext = {}
 let s:ext._theme_funcrefs = []
 
@@ -22,14 +23,25 @@ endfunction
 let s:script_path = tolower(resolve(expand('<sfile>:p:h')))
 
 let s:filetype_overrides = {
-      \ 'nerdtree': [ 'NERD', '' ],
+      \ 'coc-explorer':  [ 'CoC Explorer', '' ],
+      \ 'defx':  ['defx', '%{b:defx.paths[0]}'],
+      \ 'fugitive': ['fugitive', '%{airline#util#wrap(airline#extensions#branch#get_head(),80)}'],
       \ 'gundo': [ 'Gundo', '' ],
-      \ 'vimfiler': [ 'vimfiler', '%{vimfiler#get_status_string()}' ],
+      \ 'help':  [ 'Help', '%f' ],
       \ 'minibufexpl': [ 'MiniBufExplorer', '' ],
       \ 'startify': [ 'startify', '' ],
       \ 'vim-plug': [ 'Plugins', '' ],
+      \ 'vimfiler': [ 'vimfiler', '%{vimfiler#get_status_string()}' ],
+      \ 'vimshell': ['vimshell','%{vimshell#get_status_string()}'],
+      \ 'vaffle' : [ 'Vaffle', '%{b:vaffle.dir}' ],
       \ }
 
+if get(g:, 'airline#extensions#nerdtree_statusline', 1)
+  let s:filetype_overrides['nerdtree'] = [ get(g:, 'NERDTreeStatusline', 'NERD'), '' ]
+else
+  let s:filetype_overrides['nerdtree'] = ['NERDTree', '']
+endif
+
 let s:filetype_regex_overrides = {}
 
 function! s:check_defined_section(name)
@@ -56,32 +68,39 @@ function! airline#extensions#apply_left_override(section1, section2)
   let w:airline_render_right = 0
 endfunction
 
-let s:active_winnr = -1
 function! airline#extensions#apply(...)
-  let s:active_winnr = winnr()
+  let filetype_overrides = get(s:, 'filetype_overrides', {})
+  call extend(filetype_overrides, get(g:, 'airline_filetype_overrides', {}), 'force')
 
   if s:is_excluded_window()
     return -1
   endif
 
-  if &buftype == 'help'
-    call airline#extensions#apply_left_override('Help', '%f')
+  if &buftype == 'terminal'
     let w:airline_section_x = ''
     let w:airline_section_y = ''
-    let w:airline_render_right = 1
   endif
 
-  if &previewwindow
+  if &previewwindow && empty(get(w:, 'airline_section_a', ''))
     let w:airline_section_a = 'Preview'
     let w:airline_section_b = ''
     let w:airline_section_c = bufname(winbufnr(winnr()))
   endif
 
-  if has_key(s:filetype_overrides, &ft)
-    let args = s:filetype_overrides[&ft]
+  if has_key(filetype_overrides, &ft) &&
+        \ ((&filetype == 'help' && &buftype == 'help') || &filetype !~ 'help')
+    " for help files only override it, if the buftype is also of type 'help',
+    " else it would trigger when editing Vim help files
+    let args = filetype_overrides[&ft]
     call airline#extensions#apply_left_override(args[0], args[1])
   endif
 
+  if &buftype == 'help'
+    let w:airline_section_x = ''
+    let w:airline_section_y = ''
+    let w:airline_render_right = 1
+  endif
+
   for item in items(s:filetype_regex_overrides)
     if match(&ft, item[0]) >= 0
       call airline#extensions#apply_left_override(item[1][0], item[1][1])
@@ -113,16 +132,8 @@ function! airline#extensions#load_theme()
   call airline#util#exec_funcrefs(s:ext._theme_funcrefs, g:airline#themes#{g:airline_theme}#palette)
 endfunction
 
-function! s:sync_active_winnr()
-  if exists('#airline') && winnr() != s:active_winnr
-    call airline#update_statusline()
-  endif
-endfunction
-
 function! airline#extensions#load()
-  let loaded_ext = []
-  " non-trivial number of external plugins use eventignore=all, so we need to account for that
-  autocmd CursorMoved * call <sid>sync_active_winnr()
+  let s:loaded_ext = []
 
   if exists('g:airline_extensions')
     for ext in g:airline_extensions
@@ -130,32 +141,62 @@ function! airline#extensions#load()
         call airline#extensions#{ext}#init(s:ext)
       catch /^Vim\%((\a\+)\)\=:E117/	" E117, function does not exist
         call airline#util#warning("Extension '".ext."' not installed, ignoring!")
+        continue
       endtry
+      call add(s:loaded_ext, ext)
     endfor
     return
   endif
 
   call airline#extensions#quickfix#init(s:ext)
-  call add(loaded_ext, 'quickfix')
+  call add(s:loaded_ext, 'quickfix')
 
-  if get(g:, 'loaded_unite', 0)
+  if get(g:, 'loaded_unite', 0) && get(g:, 'airline#extensions#unite#enabled', 1)
     call airline#extensions#unite#init(s:ext)
-    call add(loaded_ext, 'unite')
+    call add(s:loaded_ext, 'unite')
   endif
 
-  if get(g:, 'loaded_denite', 0)
+  if get(g:, 'loaded_denite', 0) && get(g:, 'airline#extensions#denite#enabled', 1)
     call airline#extensions#denite#init(s:ext)
-    call add(loaded_ext, 'denite')
+    call add(s:loaded_ext, 'denite')
+  endif
+
+  if get(g:, 'loaded_gina', 0) && get(g:, 'airline#extensions#gina#enabled', 1)
+    call airline#extensions#gina#init(s:ext)
+    call add(s:loaded_ext, 'gina')
+  endif
+
+  if get(g:, 'fern_loaded', 0) && get(g:, 'airline#extensions#fern#enabled', 1)
+    call airline#extensions#fern#init(s:ext)
+    call add(s:loaded_ext, 'fern')
   endif
 
   if exists(':NetrwSettings')
     call airline#extensions#netrw#init(s:ext)
-    call add(loaded_ext, 'netrw')
+    call add(s:loaded_ext, 'netrw')
   endif
 
-  if get(g:, 'airline#extensions#ycm#enabled', 0)
+  " fzf buffers are also terminal buffers, so this must be above term.
+  if exists(':FZF') && get(g:, 'airline#extensions#fzf#enabled', 1)
+    call airline#extensions#fzf#init(s:ext)
+    call add(s:loaded_ext, 'fzf')
+  endif
+
+  " Vim-CMake buffers are also terminal buffers, so this must be above term.
+  if get(g:, 'loaded_cmake', 0) && get(g:, 'airline#extensions#vimcmake#enabled', 1)
+    call airline#extensions#vimcmake#init(s:ext)
+    call add(s:loaded_ext, 'vimcmake')
+  endif
+
+  if (has("terminal") || has('nvim')) &&
+        \ get(g:, 'airline#extensions#term#enabled', 1)
+    call airline#extensions#term#init(s:ext)
+    call add(s:loaded_ext, 'term')
+  endif
+
+  if get(g:, 'airline#extensions#ycm#enabled', 0) && exists('g:loaded_youcompleteme')
     call airline#extensions#ycm#init(s:ext)
-    call add(loaded_ext, 'ycm')
+    call add(s:loaded_ext, 'ycm')
   endif
 
   if get(g:, 'loaded_vimfiler', 0)
@@ -164,156 +205,260 @@ function! airline#extensions#load()
 
   if get(g:, 'loaded_ctrlp', 0)
     call airline#extensions#ctrlp#init(s:ext)
-    call add(loaded_ext, 'ctrlp')
+    call add(s:loaded_ext, 'ctrlp')
+  endif
+
+  if get(g:, 'loaded_localsearch', 0)
+    call airline#extensions#localsearch#init(s:ext)
+    call add(s:loaded_ext, 'localsearch')
   endif
 
   if get(g:, 'CtrlSpaceLoaded', 0)
     call airline#extensions#ctrlspace#init(s:ext)
-    call add(loaded_ext, 'ctrlspace')
+    call add(s:loaded_ext, 'ctrlspace')
   endif
 
   if get(g:, 'command_t_loaded', 0)
     call airline#extensions#commandt#init(s:ext)
-    call add(loaded_ext, 'commandt')
+    call add(s:loaded_ext, 'commandt')
   endif
 
   if exists(':UndotreeToggle')
     call airline#extensions#undotree#init(s:ext)
-    call add(loaded_ext, 'undotree')
+    call add(s:loaded_ext, 'undotree')
   endif
 
   if get(g:, 'airline#extensions#hunks#enabled', 1)
-        \ && (exists('g:loaded_signify') || exists('g:loaded_gitgutter') || exists('g:loaded_changes') || exists('g:loaded_quickfixsigns'))
+        \ && (exists('g:loaded_signify')
+        \ || exists('g:loaded_gitgutter')
+        \ || exists('g:loaded_changes')
+        \ || exists('g:loaded_quickfixsigns')
+        \ || exists(':CocCommand'))
     call airline#extensions#hunks#init(s:ext)
-    call add(loaded_ext, 'hunks')
+    call add(s:loaded_ext, 'hunks')
   endif
 
   if get(g:, 'airline#extensions#vimagit#enabled', 1)
         \ && (exists('g:loaded_magit'))
     call airline#extensions#vimagit#init(s:ext)
-    call add(loaded_ext, 'vimagit')
+    call add(s:loaded_ext, 'vimagit')
   endif
 
   if get(g:, 'airline#extensions#tagbar#enabled', 1)
         \ && exists(':TagbarToggle')
     call airline#extensions#tagbar#init(s:ext)
-    call add(loaded_ext, 'tagbar')
+    call add(s:loaded_ext, 'tagbar')
+  endif
+
+  if get(g:, 'airline#extensions#vista#enabled', 1)
+        \ && exists(':Vista')
+    call airline#extensions#vista#init(s:ext)
+    call add(s:loaded_ext, 'vista')
+  endif
+
+  if get(g:, 'airline#extensions#bookmark#enabled', 1)
+        \ && exists(':BookmarkToggle')
+    call airline#extensions#bookmark#init(s:ext)
+    call add(s:loaded_ext, 'bookmark')
   endif
 
   if get(g:, 'airline#extensions#csv#enabled', 1)
         \ && (get(g:, 'loaded_csv', 0) || exists(':Table'))
     call airline#extensions#csv#init(s:ext)
-    call add(loaded_ext, 'csv')
+    call add(s:loaded_ext, 'csv')
+  endif
+
+  if get(g:, 'airline#extensions#zoomwintab#enabled', 0)
+    call airline#extensions#zoomwintab#init(s:ext)
+    call add(s:loaded_ext, 'zoomwintab')
   endif
 
   if exists(':VimShell')
-    let s:filetype_overrides['vimshell'] = ['vimshell','%{vimshell#get_status_string()}']
     let s:filetype_regex_overrides['^int-'] = ['vimshell','%{substitute(&ft, "int-", "", "")}']
   endif
 
-  if get(g:, 'airline#extensions#branch#enabled', 1)
-        \ && (exists('*fugitive#head') || exists('*lawrencium#statusline') ||
-        \     (get(g:, 'airline#extensions#branch#use_vcscommand', 0) && exists('*VCSCommandGetStatusLine')))
+  if get(g:, 'airline#extensions#branch#enabled', 1) && (
+          \ airline#util#has_fugitive() ||
+          \ airline#util#has_gina() ||
+          \ airline#util#has_lawrencium() ||
+          \ airline#util#has_vcscommand() ||
+          \ airline#util#has_custom_scm())
     call airline#extensions#branch#init(s:ext)
-    call add(loaded_ext, 'branch')
+    call add(s:loaded_ext, 'branch')
   endif
 
   if get(g:, 'airline#extensions#bufferline#enabled', 1)
         \ && exists('*bufferline#get_status_string')
     call airline#extensions#bufferline#init(s:ext)
-    call add(loaded_ext, 'bufferline')
+    call add(s:loaded_ext, 'bufferline')
   endif
 
-  if (get(g:, 'airline#extensions#virtualenv#enabled', 1) && (exists(':VirtualEnvList') || isdirectory($VIRTUAL_ENV)))
+  if get(g:, 'airline#extensions#fugitiveline#enabled', 1)
+        \ && airline#util#has_fugitive()
+        \ && index(s:loaded_ext, 'bufferline') == -1
+    call airline#extensions#fugitiveline#init(s:ext)
+    call add(s:loaded_ext, 'fugitiveline')
+  endif
+
+  " NOTE: This means that if both virtualenv and poetv are enabled and
+  " available, poetv silently takes precedence and the virtualenv
+  " extension won't be initialized. Since both extensions currently just
+  " add a virtualenv identifier section to the airline, this seems
+  " acceptable.
+  if (get(g:, 'airline#extensions#poetv#enabled', 0) && (exists(':PoetvActivate')))
+    call airline#extensions#poetv#init(s:ext)
+    call add(s:loaded_ext, 'poetv')
+  elseif (get(g:, 'airline#extensions#virtualenv#enabled', 0) && (exists(':VirtualEnvList')))
     call airline#extensions#virtualenv#init(s:ext)
-    call add(loaded_ext, 'virtualenv')
+    call add(s:loaded_ext, 'virtualenv')
+  elseif (get(g:, 'airline#extensions#poetv#enabled', 0) && (isdirectory($VIRTUAL_ENV)))
+    call airline#extensions#poetv#init(s:ext)
+    call add(s:loaded_ext, 'poetv')
   endif
 
   if (get(g:, 'airline#extensions#eclim#enabled', 1) && exists(':ProjectCreate'))
     call airline#extensions#eclim#init(s:ext)
-    call add(loaded_ext, 'eclim')
+    call add(s:loaded_ext, 'eclim')
   endif
 
   if get(g:, 'airline#extensions#syntastic#enabled', 1)
         \ && exists(':SyntasticCheck')
     call airline#extensions#syntastic#init(s:ext)
-    call add(loaded_ext, 'syntastic')
+    call add(s:loaded_ext, 'syntastic')
   endif
 
   if (get(g:, 'airline#extensions#ale#enabled', 1) && exists(':ALELint'))
     call airline#extensions#ale#init(s:ext)
-    call add(loaded_ext, 'ale')
+    call add(s:loaded_ext, 'ale')
+  endif
+
+  if (get(g:, 'airline#extensions#lsp#enabled', 1) && exists(':LspDeclaration'))
+    call airline#extensions#lsp#init(s:ext)
+    call add(s:loaded_ext, 'lsp')
+  endif
+
+  if (get(g:, 'airline#extensions#nvimlsp#enabled', 1)
+        \ && exists(':LspInstallInfo'))
+    call airline#extensions#nvimlsp#init(s:ext)
+    call add(s:loaded_ext, 'nvimlsp')
+  endif
+
+  if (get(g:, 'airline#extensions#coc#enabled', 1) && exists(':CocCommand'))
+    call airline#extensions#coc#init(s:ext)
+    call add(s:loaded_ext, 'coc')
+  endif
+
+  if (get(g:, 'airline#extensions#languageclient#enabled', 1) && exists(':LanguageClientStart'))
+    call airline#extensions#languageclient#init(s:ext)
+    call add(s:loaded_ext, 'languageclient')
   endif
 
   if get(g:, 'airline#extensions#whitespace#enabled', 1)
     call airline#extensions#whitespace#init(s:ext)
-    call add(loaded_ext, 'whitespace')
+    call add(s:loaded_ext, 'whitespace')
   endif
 
   if (get(g:, 'airline#extensions#neomake#enabled', 1) && exists(':Neomake'))
     call airline#extensions#neomake#init(s:ext)
-    call add(loaded_ext, 'neomake')
+    call add(s:loaded_ext, 'neomake')
   endif
 
   if get(g:, 'airline#extensions#po#enabled', 1) && executable('msgfmt')
     call airline#extensions#po#init(s:ext)
-    call add(loaded_ext, 'po')
+    call add(s:loaded_ext, 'po')
   endif
 
   if get(g:, 'airline#extensions#wordcount#enabled', 1)
     call airline#extensions#wordcount#init(s:ext)
-    call add(loaded_ext, 'wordcount')
+    call add(s:loaded_ext, 'wordcount')
   endif
 
   if get(g:, 'airline#extensions#tabline#enabled', 0)
     call airline#extensions#tabline#init(s:ext)
-    call add(loaded_ext, 'tabline')
+    call add(s:loaded_ext, 'tabline')
   endif
 
   if get(g:, 'airline#extensions#tmuxline#enabled', 1) && exists(':Tmuxline')
     call airline#extensions#tmuxline#init(s:ext)
-    call add(loaded_ext, 'tmuxline')
+    call add(s:loaded_ext, 'tmuxline')
   endif
 
   if get(g:, 'airline#extensions#promptline#enabled', 1) && exists(':PromptlineSnapshot') && len(get(g:, 'airline#extensions#promptline#snapshot_file', ''))
     call airline#extensions#promptline#init(s:ext)
-    call add(loaded_ext, 'promptline')
+    call add(s:loaded_ext, 'promptline')
   endif
 
-  if get(g:, 'airline#extensions#nrrwrgn#enabled', 1) && exists(':NR') == 2
+  if get(g:, 'airline#extensions#nrrwrgn#enabled', 1) && get(g:, 'loaded_nrrw_rgn', 0)
       call airline#extensions#nrrwrgn#init(s:ext)
-    call add(loaded_ext, 'nrrwrgn')
+    call add(s:loaded_ext, 'nrrwrgn')
   endif
 
   if get(g:, 'airline#extensions#unicode#enabled', 1) && exists(':UnicodeTable') == 2
       call airline#extensions#unicode#init(s:ext)
-    call add(loaded_ext, 'nrrwrgn')
+    call add(s:loaded_ext, 'unicode')
   endif
 
   if (get(g:, 'airline#extensions#capslock#enabled', 1) && exists('*CapsLockStatusline'))
     call airline#extensions#capslock#init(s:ext)
-    call add(loaded_ext, 'capslock')
+    call add(s:loaded_ext, 'capslock')
+  endif
+
+  if (get(g:, 'airline#extensions#gutentags#enabled', 1) && get(g:, 'loaded_gutentags', 0))
+    call airline#extensions#gutentags#init(s:ext)
+    call add(s:loaded_ext, 'gutentags')
+  endif
+
+  if get(g:, 'airline#extensions#gen_tags#enabled', 1) && (get(g:, 'loaded_gentags#gtags', 0) || get(g:, 'loaded_gentags#ctags', 0))
+    call airline#extensions#gen_tags#init(s:ext)
+    call add(s:loaded_ext, 'gen_tags')
+  endif
+
+  if (get(g:, 'airline#extensions#grepper#enabled', 1) && get(g:, 'loaded_grepper', 0))
+    call airline#extensions#grepper#init(s:ext)
+    call add(s:loaded_ext, 'grepper')
   endif
 
   if (get(g:, 'airline#extensions#xkblayout#enabled', 1) && exists('g:XkbSwitchLib'))
     call airline#extensions#xkblayout#init(s:ext)
-    call add(loaded_ext, 'xkblayout')
+    call add(s:loaded_ext, 'xkblayout')
+  endif
+
+  if (get(g:, 'airline#extensions#keymap#enabled', 1) && has('keymap'))
+    call airline#extensions#keymap#init(s:ext)
+    call add(s:loaded_ext, 'keymap')
   endif
 
   if (get(g:, 'airline#extensions#windowswap#enabled', 1) && get(g:, 'loaded_windowswap', 0))
     call airline#extensions#windowswap#init(s:ext)
-    call add(loaded_ext, 'windowswap')
+    call add(s:loaded_ext, 'windowswap')
   endif
 
   if (get(g:, 'airline#extensions#obsession#enabled', 1) && exists('*ObsessionStatus'))
     call airline#extensions#obsession#init(s:ext)
-    call add(loaded_ext, 'obsession')
+    call add(s:loaded_ext, 'obsession')
   endif
 
-  runtime autoload/vimtex.vim
-  if (get(g:, 'airline#extensions#vimtex#enabled', 1)) && exists('*vimtex#init')
-   call airline#extensions#vimtex#init(s:ext)
-   call add(loaded_ext, 'vimtex')
+  if get(g:, 'airline#extensions#vimtex#enabled', 1)
+    runtime autoload/vimtex.vim
+    if exists('*vimtex#init')
+      call airline#extensions#vimtex#init(s:ext)
+      call add(s:loaded_ext, 'vimtex')
+    endif
+  endif
+
+  if (get(g:, 'airline#extensions#cursormode#enabled', 0))
+    call airline#extensions#cursormode#init(s:ext)
+    call add(s:loaded_ext, 'cursormode')
+  endif
+
+  if get(g:, 'airline#extensions#searchcount#enabled', 1) && exists('*searchcount')
+    call airline#extensions#searchcount#init(s:ext)
+    call add(s:loaded_ext, 'searchcount')
+  endif
+
+  if get(g:, 'loaded_battery', 0) && get(g:, 'airline#extensions#battery#enabled', 0)
+    call airline#extensions#battery#init(s:ext)
+    call add(s:loaded_ext, 'battery')
   endif
 
   if !get(g:, 'airline#extensions#disable_rtp_load', 0)
@@ -326,15 +471,31 @@ function! airline#extensions#load()
             \ && stridx(tolower(fnamemodify(file, ':p')), s:script_path) < 0
         let name = fnamemodify(file, ':t:r')
         if !get(g:, 'airline#extensions#'.name.'#enabled', 1) ||
-            \ index(loaded_ext, name) > -1
+            \ index(s:loaded_ext, name) > -1
           continue
         endif
         try
           call airline#extensions#{name}#init(s:ext)
+          " mark as external
+          call add(s:loaded_ext, name.'*')
         catch
         endtry
       endif
     endfor
   endif
+
+  if exists(':Dirvish') && get(g:, 'airline#extensions#dirvish#enabled', 1)
+    call airline#extensions#dirvish#init(s:ext)
+    call add(s:loaded_ext, 'dirvish')
+  endif
+
+  if (get(g:, 'airline#extensions#omnisharp#enabled', 1) && get(g:, 'OmniSharp_loaded', 0))
+    call airline#extensions#omnisharp#init(s:ext)
+    call add(s:loaded_ext, 'omnisharp')
+  endif
+
 endfunction
 
+function! airline#extensions#get_loaded_extensions()
+  return s:loaded_ext
+endfunction

autoload/airline/extensions/ale.vim

@@ -1,31 +1,111 @@
-" MIT License. Copyright (c) 2013-2017 Bjorn Neergaard, w0rp
+" MIT License. Copyright (c) 2013-2020 Bjorn Neergaard, w0rp et al.
+" Plugin: https://github.com/dense-analysis/ale
 " vim: et ts=2 sts=2 sw=2
 
-let s:error_symbol = get(g:, 'airline#extensions#ale#error_symbol', 'E:')
-let s:warning_symbol = get(g:, 'airline#extensions#ale#warning_symbol', 'W:')
+scriptencoding utf-8
+
+if !get(g:, 'loaded_ale_dont_use_this_in_other_plugins_please', 0)
+  finish
+endif
+
+function! s:airline_ale_count(cnt, symbol)
+  return a:cnt ? a:symbol. a:cnt : ''
+endfunction
+
+function! s:legacy_airline_ale_get_line_number(cnt, type) abort
+  " Before ALE introduced the FirstProblem API function, this is how
+  " airline would get the line numbers:
+  " 1. Get the whole loclist; 2. Filter it for the desired problem type.
+  " 3. Return the line number of the first element in the filtered list.
+  if a:cnt == 0
+    return ''
+  endif
+
+  let buffer       = bufnr('')
+  let problem_type = (a:type ==# 'error') ? 'E' : 'W'
+  let problems     = copy(ale#engine#GetLoclist(buffer))
+
+  call filter(problems, 'v:val.bufnr is buffer && v:val.type is# problem_type')
+
+  if empty(problems)
+    return ''
+  endif
+
+  let open_lnum_symbol  = get(g:, 'airline#extensions#ale#open_lnum_symbol', '(L')
+  let close_lnum_symbol = get(g:, 'airline#extensions#ale#close_lnum_symbol', ')')
+
+  return open_lnum_symbol . problems[0].lnum . close_lnum_symbol
+endfunction
+
+function! s:new_airline_ale_get_line_number(cnt, type) abort
+  " The FirstProblem call in ALE is a far more efficient way
+  " of obtaining line number data. If the installed ALE supports
+  " it, we should use this method of getting line data.
+  if a:cnt == 0
+    return ''
+  endif
+  let l:buffer = bufnr('')
+
+  " Try to get the first error from ALE.
+  let l:result = ale#statusline#FirstProblem(l:buffer, a:type)
+  if empty(l:result)
+    " If there are no errors then try and check for style errors.
+    let l:result =  ale#statusline#FirstProblem(l:buffer, 'style_' . a:type)
+  endif
+
+  if empty(l:result)
+      return ''
+  endif
+
+  let l:open_lnum_symbol  =
+    \ get(g:, 'airline#extensions#ale#open_lnum_symbol', '(L')
+  let l:close_lnum_symbol =
+    \ get(g:, 'airline#extensions#ale#close_lnum_symbol', ')')
+
+  return open_lnum_symbol . l:result.lnum . close_lnum_symbol
+endfunction
+
+function! s:airline_ale_get_line_number(cnt, type) abort
+  " Use the new ALE statusline API function if it is available.
+  if exists("*ale#statusline#FirstProblem")
+    return s:new_airline_ale_get_line_number(a:cnt, a:type)
+  endif
+
+  return s:legacy_airline_ale_get_line_number(a:cnt, a:type)
+endfunction
 
 function! airline#extensions#ale#get(type)
   if !exists(':ALELint')
     return ''
   endif
 
-  let l:is_err = a:type ==# 'error'
-  let l:counts = ale#statusline#Count(bufnr(''))
-  let l:symbol = l:is_err ? s:error_symbol : s:warning_symbol
+  let error_symbol = get(g:, 'airline#extensions#ale#error_symbol', 'E:')
+  let warning_symbol = get(g:, 'airline#extensions#ale#warning_symbol', 'W:')
+  let checking_symbol = get(g:, 'airline#extensions#ale#checking_symbol', '...')
+  let show_line_numbers = get(g:, 'airline#extensions#ale#show_line_numbers', 1)
 
-  if type(l:counts) == type({}) && has_key(l:counts, 'error')
-    " Use the current Dictionary format.
-    let l:errors = l:counts.error + l:counts.style_error
-    let l:num = l:is_err ? l:errors : l:counts.total - l:errors
-  else
-    " Use the old List format.
-    let l:num = l:is_err ? l:counts[0] : l:counts[1]
+  let is_err = a:type ==# 'error'
+
+  if ale#engine#IsCheckingBuffer(bufnr('')) == 1
+    return is_err ? '' : checking_symbol
   endif
 
-  if l:num == 0
-    return ''
+  let symbol = is_err ? error_symbol : warning_symbol
+
+  let counts = ale#statusline#Count(bufnr(''))
+  if type(counts) == type({}) && has_key(counts, 'error')
+    " Use the current Dictionary format.
+    let errors = counts.error + counts.style_error
+    let num = is_err ? errors : counts.total - errors
   else
-    return l:symbol . l:num
+    " Use the old List format.
+    let num = is_err ? counts[0] : counts[1]
+  endif
+
+  if show_line_numbers == 1
+    return s:airline_ale_count(num, symbol) . <sid>airline_ale_get_line_number(num, a:type)
+  else
+    return s:airline_ale_count(num, symbol)
   endif
 endfunction
 
@@ -40,4 +120,15 @@ endfunction
 function! airline#extensions#ale#init(ext)
   call airline#parts#define_function('ale_error_count', 'airline#extensions#ale#get_error')
   call airline#parts#define_function('ale_warning_count', 'airline#extensions#ale#get_warning')
+  augroup airline_ale
+    autocmd!
+    autocmd CursorHold,BufWritePost * call <sid>ale_refresh()
+    autocmd User ALEJobStarted,ALELintPost call <sid>ale_refresh()
+  augroup END
+endfunction
+
+function! s:ale_refresh()
+  if get(g:, 'airline_skip_empty_sections', 0)
+    exe ':AirlineRefresh!'
+  endif
 endfunction

autoload/airline/extensions/battery.vim

@@ -0,0 +1,23 @@
+" MIT License. Copyright (c) 2014-2020 Mathias Andersson et al.
+" Plugin: https://github.com/lambdalisue/battery.vim
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+if !exists('g:loaded_battery')
+  finish
+endif
+
+function! airline#extensions#battery#status(...) abort
+  if !exists('g:battery#update_statusline')
+    let g:battery#update_statusline = 1
+    call battery#update()
+  endif
+
+  let bat = battery#component()
+  return bat
+endfunction
+
+function! airline#extensions#battery#init(ext) abort
+  call airline#parts#define_function('battery', 'airline#extensions#battery#status')
+endfunction

autoload/airline/extensions/bookmark.vim

@@ -0,0 +1,30 @@
+" MIT License. Copyright (c) 2020 Bjoern Petri <bjoern.petri@sundevil.de>
+" Plugin: https://github.com/MattesGroeger/vim-bookmarks
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+if !exists(':BookmarkToggle')
+  finish
+endif
+
+function! airline#extensions#bookmark#currentbookmark() abort
+  if get(w:, 'airline_active', 0)
+    let file = expand('%:p')
+    if file ==# ''
+      return
+    endif
+
+    let current_line = line('.')
+    let has_bm = bm#has_bookmark_at_line(file, current_line)
+    let bm = has_bm ? bm#get_bookmark_by_line(file, current_line) : 0
+    let annotation = has_bm ? bm['annotation'] : ''
+
+    return annotation
+  endif
+  return ''
+endfunction
+
+function! airline#extensions#bookmark#init(ext) abort
+  call airline#parts#define_function('bookmark', 'airline#extensions#bookmark#currentbookmark')
+endfunction

autoload/airline/extensions/branch.vim

@@ -1,18 +1,9 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling et al.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" Plugin: fugitive, gina, lawrencium and vcscommand
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
 
-let s:has_fugitive = exists('*fugitive#head')
-let s:has_lawrencium = exists('*lawrencium#statusline')
-let s:has_vcscommand = get(g:, 'airline#extensions#branch#use_vcscommand', 0) && exists('*VCSCommandGetStatusLine')
-
-if !s:has_fugitive && !s:has_lawrencium && !s:has_vcscommand
-  finish
-endif
-
-let s:has_async = airline#util#async
-
 " s:vcs_config contains static configuration of VCSes and their status relative
 " to the active file.
 " 'branch'    - The name of currently active branch. This field is empty iff it
@@ -27,18 +18,22 @@ let s:vcs_config = {
 \  'git': {
 \    'exe': 'git',
 \    'cmd': 'git status --porcelain -- ',
+\    'dirty': 'git status -uno --porcelain --ignore-submodules',
 \    'untracked_mark': '??',
-\    'update_branch': 's:update_git_branch',
 \    'exclude': '\.git',
+\    'update_branch': 's:update_git_branch',
+\    'display_branch': 's:display_git_branch',
 \    'branch': '',
 \    'untracked': {},
 \  },
 \  'mercurial': {
 \    'exe': 'hg',
 \    'cmd': 'hg status -u -- ',
+\    'dirty': 'hg status -mard',
 \    'untracked_mark': '?',
 \    'exclude': '\.hg',
 \    'update_branch': 's:update_hg_branch',
+\    'display_branch': 's:display_hg_branch',
 \    'branch': '',
 \    'untracked': {},
 \  },
@@ -59,6 +54,7 @@ function! s:init_buffer()
     let b:buffer_vcs_config[vcs] = {
           \     'branch': '',
           \     'untracked': '',
+          \     'dirty': 0,
           \   }
   endfor
   unlet! b:airline_head
@@ -83,55 +79,86 @@ else
   endfunction
 endif
 
-let s:git_dirs = {}
 
-function! s:update_git_branch(path)
-  if !s:has_fugitive
+" Fugitive special revisions. call '0' "staging" ?
+let s:names = {'0': 'index', '1': 'orig', '2':'fetch', '3':'merge'}
+let s:sha1size = get(g:, 'airline#extensions#branch#sha1_len', 7)
+
+function! s:update_git_branch()
+  call airline#util#ignore_next_focusgain()
+  if !airline#util#has_fugitive() && !airline#util#has_gina()
     let s:vcs_config['git'].branch = ''
     return
   endif
-
-  let name = fugitive#head(7)
-  if empty(name)
-    if has_key(s:git_dirs, a:path)
-      let s:vcs_config['git'].branch = s:git_dirs[a:path]
-      return
+  if airline#util#has_fugitive()
+    let s:vcs_config['git'].branch = exists("*FugitiveHead") ?
+          \ FugitiveHead(s:sha1size) : fugitive#head(s:sha1size)
+    if s:vcs_config['git'].branch is# 'master' &&
+          \ airline#util#winwidth() < 81
+      " Shorten default a bit
+      let s:vcs_config['git'].branch='mas'
     endif
-
-    let dir = fugitive#extract_git_dir(a:path)
-    if empty(dir)
-      let name = ''
-    else
-      try
-        let line = join(readfile(dir . '/HEAD'))
-        if strpart(line, 0, 16) == 'ref: refs/heads/'
-          let name = strpart(line, 16)
-        else
-          " raw commit hash
-          let name = strpart(line, 0, 7)
-        endif
-      catch
-        let name = ''
-      endtry
+  else
+    try
+      let g:gina#component#repo#commit_length = s:sha1size
+      let s:vcs_config['git'].branch = gina#component#repo#branch()
+    catch
+    endtry
+    if s:vcs_config['git'].branch is# 'master' &&
+          \ airline#util#winwidth() < 81
+      " Shorten default a bit
+      let s:vcs_config['git'].branch='mas'
     endif
   endif
-
-  let s:git_dirs[a:path] = name
-  let s:vcs_config['git'].branch = name
 endfunction
 
-function! s:update_hg_branch(path)
-  if s:has_lawrencium
-    let stl=lawrencium#statusline()
-    if !empty(stl) && s:has_async
-      call s:get_mq_async('LC_ALL=C hg qtop', expand('%:p'))
+function! s:display_git_branch()
+  " disable FocusGained autocommand, might cause loops because system() causes
+  " a refresh, which causes a system() command again #2029
+  call airline#util#ignore_next_focusgain()
+  let name = b:buffer_vcs_config['git'].branch
+  try
+    let commit = matchstr(FugitiveParse()[0], '^\x\+')
+
+    if has_key(s:names, commit)
+      let name = get(s:names, commit)."(".name.")"
+    elseif !empty(commit)
+      let ref = fugitive#repo().git_chomp('describe', '--all', '--exact-match', commit)
+      if ref !~ "^fatal: no tag exactly matches"
+        let name = s:format_name(substitute(ref, '\v\C^%(heads/|remotes/|tags/)=','',''))."(".name.")"
+      else
+        let name = matchstr(commit, '.\{'.s:sha1size.'}')."(".name.")"
+      endif
     endif
-    if exists("s:mq") && !empty(s:mq)
+  catch
+  endtry
+  return name
+endfunction
+
+function! s:update_hg_branch()
+  if airline#util#has_lawrencium()
+    let cmd='LC_ALL=C hg qtop'
+    let stl=lawrencium#statusline()
+    let file=expand('%:p')
+    if !empty(stl) && get(b:, 'airline_do_mq_check', 1)
+      if g:airline#init#vim_async
+        noa call airline#async#get_mq_async(cmd, file)
+      elseif has("nvim")
+        noa call airline#async#nvim_get_mq_async(cmd, file)
+      else
+        " remove \n at the end of the command
+        let output=system(cmd)[0:-2]
+        noa call airline#async#mq_output(output, file)
+      endif
+    endif
+    " do not do mq check anymore
+    let b:airline_do_mq_check = 0
+    if exists("b:mq") && !empty(b:mq)
       if stl is# 'default'
         " Shorten default a bit
         let stl='def'
       endif
-      let stl.=' ['.s:mq.']'
+      let stl.=' ['.b:mq.']'
     endif
     let s:vcs_config['mercurial'].branch = stl
   else
@@ -139,10 +166,13 @@ function! s:update_hg_branch(path)
   endif
 endfunction
 
+function! s:display_hg_branch()
+  return b:buffer_vcs_config['mercurial'].branch
+endfunction
+
 function! s:update_branch()
-  let l:path = exists("*fnamemodify") ? fnamemodify(resolve(@%), ":p:h") : expand("%:p:h")
   for vcs in keys(s:vcs_config)
-    call {s:vcs_config[vcs].update_branch}(l:path)
+    call {s:vcs_config[vcs].update_branch}()
     if b:buffer_vcs_config[vcs].branch != s:vcs_config[vcs].branch
       let b:buffer_vcs_config[vcs].branch = s:vcs_config[vcs].branch
       unlet! b:airline_head
@@ -150,7 +180,7 @@ function! s:update_branch()
   endfor
 endfunction
 
-function! s:update_untracked_in_buffer_config(file, vcs)
+function! airline#extensions#branch#update_untracked_config(file, vcs)
   if !has_key(s:vcs_config[a:vcs].untracked, a:file)
     return
   elseif s:vcs_config[a:vcs].untracked[a:file] != b:buffer_vcs_config[a:vcs].untracked
@@ -160,129 +190,52 @@ function! s:update_untracked_in_buffer_config(file, vcs)
 endfunction
 
 function! s:update_untracked()
-  let l:file = expand("%:p")
-  if empty(l:file) || isdirectory(l:file)
+  let file = expand("%:p")
+  if empty(file) || isdirectory(file) || !empty(&buftype)
     return
   endif
 
-  let l:needs_update = 1
+  let needs_update = 1
+  let vcs_checks   = get(g:, "airline#extensions#branch#vcs_checks", ["untracked", "dirty"])
   for vcs in keys(s:vcs_config)
-    if l:file =~ s:vcs_config[vcs].exclude
+    if file =~ s:vcs_config[vcs].exclude
       " Skip check for files that live in the exclude directory
-      let l:needs_update = 0
+      let needs_update = 0
     endif
-    if has_key(s:vcs_config[vcs].untracked, l:file)
-      let l:needs_update = 0
-      call s:update_untracked_in_buffer_config(l:file, vcs)
+    if has_key(s:vcs_config[vcs].untracked, file)
+      let needs_update = 0
+      call airline#extensions#branch#update_untracked_config(file, vcs)
     endif
   endfor
 
-  if !l:needs_update
+  if !needs_update
     return
   endif
 
   for vcs in keys(s:vcs_config)
-    let l:config = s:vcs_config[vcs]
-    if s:has_async
-      " Note that asynchronous update updates s:vcs_config only, and only
-      " s:update_untracked updates b:buffer_vcs_config. If s:vcs_config is
-      " invalidated again before s:update_untracked is called, then we lose the
-      " result of the previous call, i.e. the head string is not updated. It
-      " doesn't happen often in practice, so we let it be.
-      call s:get_vcs_untracked_async(l:config, l:file)
-    else
-      let output = airline#util#system(l:config.cmd . shellescape(l:file))
-      if output =~? ('^' . l:config.untracked_mark)
-        let l:config.untracked[l:file] = get(g:, 'airline#extensions#branch#notexists', g:airline_symbols.notexists)
-      else
-        let l:config.untracked[l:file] = ''
-      endif
-      call s:update_untracked_in_buffer_config(l:file, vcs)
+    " only check, for git, if fugitive is installed
+    " and for 'hg' if lawrencium is installed, else skip
+    if vcs is# 'git' && (!airline#util#has_fugitive() && !airline#util#has_gina())
+      continue
+    elseif vcs is# 'mercurial' && !airline#util#has_lawrencium()
+      continue
+    endif
+    let config = s:vcs_config[vcs]
+    " Note that asynchronous update updates s:vcs_config only, and only
+    " s:update_untracked updates b:buffer_vcs_config. If s:vcs_config is
+    " invalidated again before s:update_untracked is called, then we lose the
+    " result of the previous call, i.e. the head string is not updated. It
+    " doesn't happen often in practice, so we let it be.
+    if index(vcs_checks, 'untracked') > -1
+      call airline#async#vcs_untracked(config, file, vcs)
+    endif
+    " Check clean state of repo
+    if index(vcs_checks, 'dirty') > -1
+      call airline#async#vcs_clean(config.dirty, file, vcs)
     endif
   endfor
 endfunction
 
-if s:has_async
-  let s:jobs = {}
-
-  function! s:on_stdout(channel, msg) dict abort
-    let self.buf .= a:msg
-  endfunction
-
-  function! s:on_exit(channel) dict abort
-    if self.buf =~? ('^' . self.config['untracked_mark'])
-      let self.config.untracked[self.file] = get(g:, 'airline#extensions#branch#notexists', g:airline_symbols.notexists)
-    else
-      let self.config.untracked[self.file] = ''
-    endif
-    " b:buffer_vcs_config will be updated on next call of update_untracked if
-    " needed
-    if has_key(s:jobs, self.file)
-      call remove(s:jobs, self.file)
-    endif
-  endfunction
-
-  function! s:get_vcs_untracked_async(config, file)
-    if g:airline#util#is_windows && &shell =~ 'cmd'
-      let cmd = a:config['cmd'] . shellescape(a:file)
-    else
-      let cmd = ['sh', '-c', a:config['cmd'] . shellescape(a:file)]
-    endif
-
-    let options = {'config': a:config, 'buf': '', 'file': a:file}
-    if has_key(s:jobs, a:file)
-      if job_status(get(s:jobs, a:file)) == 'run'
-        return
-      elseif has_key(s:jobs, a:file)
-        call remove(s:jobs, a:file)
-      endif
-    endif
-    let id = job_start(cmd, {
-          \ 'err_io':   'out',
-          \ 'out_cb':   function('s:on_stdout', options),
-          \ 'close_cb': function('s:on_exit', options)})
-    let s:jobs[a:file] = id
-  endfu
-
-  function! s:on_exit_mq(channel) dict abort
-    if !empty(self.buf)
-      if self.buf is# 'no patches applied' ||
-        \ self.buf =~# "unknown command 'qtop'"
-        let self.buf = ''
-      elseif exists("s:mq") && s:mq isnot# self.buf
-        " make sure, statusline is updated
-        unlet! b:airline_head
-      endif
-      let s:mq = self.buf
-    endif
-    if has_key(s:jobs, self.file)
-      call remove(s:jobs, self.file)
-    endif
-  endfunction
-
-  function! s:get_mq_async(cmd, file)
-    if g:airline#util#is_windows && &shell =~ 'cmd'
-      let cmd = a:cmd
-    else
-      let cmd = ['sh', '-c', a:cmd]
-    endif
-
-    let options = {'cmd': a:cmd, 'buf': '', 'file': a:file}
-    if has_key(s:jobs, a:file)
-      if job_status(get(s:jobs, a:file)) == 'run'
-        return
-      elseif has_key(s:jobs, a:file)
-        call remove(s:jobs, a:file)
-      endif
-    endif
-    let id = job_start(cmd, {
-          \ 'err_io':   'out',
-          \ 'out_cb':   function('s:on_stdout', options),
-          \ 'close_cb': function('s:on_exit_mq', options)})
-    let s:jobs[a:file] = id
-  endfu
-endif
-
 function! airline#extensions#branch#head()
   if !exists('b:buffer_vcs_config')
     call s:init_buffer()
@@ -296,88 +249,76 @@ function! airline#extensions#branch#head()
   endif
 
   let b:airline_head = ''
-  let l:vcs_priority = get(g:, "airline#extensions#branch#vcs_priority", ["git", "mercurial"])
+  let vcs_priority = get(g:, "airline#extensions#branch#vcs_priority", ["git", "mercurial"])
 
-  let l:heads = {}
-  for vcs in l:vcs_priority
+  let heads = []
+  for vcs in vcs_priority
     if !empty(b:buffer_vcs_config[vcs].branch)
-      let l:heads[vcs] = b:buffer_vcs_config[vcs].branch
+      let heads += [vcs]
     endif
   endfor
 
-  for vcs in keys(l:heads)
+  for vcs in heads
     if !empty(b:airline_head)
       let b:airline_head .= ' | '
     endif
-    let b:airline_head .= (len(l:heads) > 1 ? s:vcs_config[l:vcs].exe .':' : '') . s:format_name(l:heads[l:vcs])
-    let b:airline_head .= b:buffer_vcs_config[vcs].untracked
+    if len(heads) > 1
+      let b:airline_head .= s:vcs_config[vcs].exe .':'
+    endif
+    let b:airline_head .= s:format_name({s:vcs_config[vcs].display_branch}())
+    let additional = b:buffer_vcs_config[vcs].untracked
+    if empty(additional) &&
+          \ has_key(b:buffer_vcs_config[vcs], 'dirty') &&
+          \ b:buffer_vcs_config[vcs].dirty
+      let additional = g:airline_symbols['dirty']
+    endif
+    let b:airline_head .= additional
   endfor
 
-  if empty(l:heads)
-    if s:has_vcscommand
-      call VCSCommandEnableBufferSetup()
+  if empty(heads)
+    if airline#util#has_vcscommand()
+      noa call VCSCommandEnableBufferSetup()
       if exists('b:VCSCommandBufferInfo')
         let b:airline_head = s:format_name(get(b:VCSCommandBufferInfo, 0, ''))
       endif
     endif
   endif
 
-  if exists("g:airline#extensions#branch#displayed_head_limit")
-    let w:displayed_head_limit = g:airline#extensions#branch#displayed_head_limit
-    if len(b:airline_head) > w:displayed_head_limit - 1
-      let b:airline_head = b:airline_head[0:(w:displayed_head_limit - 1)].(&encoding ==? 'utf-8' ?  '…' : '.')
+  if empty(heads)
+    if airline#util#has_custom_scm()
+      try
+        let Fn = function(g:airline#extensions#branch#custom_head)
+        let b:airline_head = Fn()
+      endtry
     endif
   endif
 
-  if has_key(l:heads, 'git') && !s:check_in_path()
-    let b:airline_head = ''
+  if exists("g:airline#extensions#branch#displayed_head_limit")
+    let w:displayed_head_limit = g:airline#extensions#branch#displayed_head_limit
+    if strwidth(b:airline_head) > w:displayed_head_limit - 1
+      let b:airline_head =
+            \ airline#util#strcharpart(b:airline_head, 0, w:displayed_head_limit - 1)
+            \ . (&encoding ==? 'utf-8' ?  '…' : '.')
+    endif
   endif
-  let minwidth = empty(get(b:, 'airline_hunks', '')) ? 14 : 7
-  let b:airline_head = airline#util#shorten(b:airline_head, 120, minwidth)
+
   return b:airline_head
 endfunction
 
 function! airline#extensions#branch#get_head()
   let head = airline#extensions#branch#head()
-  let empty_message = get(g:, 'airline#extensions#branch#empty_message', '')
+  let winwidth = get(airline#parts#get('branch'), 'minwidth', 120)
+  let minwidth = empty(get(b:, 'airline_hunks', '')) ? 14 : 7
+  let head = airline#util#shorten(head, winwidth, minwidth)
   let symbol = get(g:, 'airline#extensions#branch#symbol', g:airline_symbols.branch)
   return empty(head)
-        \ ? empty_message
+        \ ? get(g:, 'airline#extensions#branch#empty_message', '')
         \ : printf('%s%s', empty(symbol) ? '' : symbol.(g:airline_symbols.space), head)
 endfunction
 
-function! s:check_in_path()
-  if !exists('b:airline_file_in_root')
-    let root = get(b:, 'git_dir', get(b:, 'mercurial_dir', ''))
-    let bufferpath = resolve(fnamemodify(expand('%'), ':p'))
-
-    if !filereadable(root) "not a file
-      " if .git is a directory, it's the old submodule format
-      if match(root, '\.git$') >= 0
-        let root = expand(fnamemodify(root, ':h'))
-      else
-        " else it's the newer format, and we need to guesstimate
-        " 1) check for worktrees
-        if match(root, 'worktrees') > -1
-          " worktree can be anywhere, so simply assume true here
-          return 1
-        endif
-        " 2) check for submodules
-        let pattern = '\.git[\\/]\(modules\)[\\/]'
-        if match(root, pattern) >= 0
-          let root = substitute(root, pattern, '', '')
-        endif
-      endif
-    endif
-
-    let b:airline_file_in_root = stridx(bufferpath, root) > -1
-  endif
-  return b:airline_file_in_root
-endfunction
-
 function! s:reset_untracked_cache(shellcmdpost)
   " shellcmdpost - whether function was called as a result of ShellCmdPost hook
-  if !s:has_async && !has('nvim')
+  if !g:airline#init#vim_async && !has('nvim')
     if a:shellcmdpost
       " Clear cache only if there was no error or the script uses an
       " asynchronous interface. Otherwise, cache clearing would overwrite
@@ -388,12 +329,12 @@ function! s:reset_untracked_cache(shellcmdpost)
     endif
   endif
 
-  let l:file = expand("%:p")
+  let file = expand("%:p")
   for vcs in keys(s:vcs_config)
     " Dump the value of the cache for the current file. Partially mitigates the
     " issue of cache invalidation happening before a call to
     " s:update_untracked()
-    call s:update_untracked_in_buffer_config(l:file, l:vcs)
+    call airline#extensions#branch#update_untracked_config(file, vcs)
     let s:vcs_config[vcs].untracked = {}
   endfor
 endfunction
@@ -401,9 +342,8 @@ endfunction
 function! airline#extensions#branch#init(ext)
   call airline#parts#define_function('branch', 'airline#extensions#branch#get_head')
 
-  autocmd BufReadPost * unlet! b:airline_file_in_root
-  autocmd CursorHold,ShellCmdPost,CmdwinLeave * unlet! b:airline_head
-  autocmd User AirlineBeforeRefresh unlet! b:airline_head
+  autocmd ShellCmdPost,CmdwinLeave * unlet! b:airline_head b:airline_do_mq_check
+  autocmd User AirlineBeforeRefresh unlet! b:airline_head b:airline_do_mq_check
   autocmd BufWritePost * call s:reset_untracked_cache(0)
   autocmd ShellCmdPost * call s:reset_untracked_cache(1)
 endfunction

autoload/airline/extensions/bufferline.vim

@@ -1,4 +1,5 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" Plugin: https://github.com/bling/vim-bufferline
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -7,10 +8,8 @@ if !exists('*bufferline#get_status_string')
   finish
 endif
 
-let s:overwrite = get(g:, 'airline#extensions#bufferline#overwrite_variables', 1)
-
 function! airline#extensions#bufferline#init(ext)
-  if s:overwrite
+  if get(g:, 'airline#extensions#bufferline#overwrite_variables', 1)
     highlight bufferline_selected gui=bold cterm=bold term=bold
     highlight link bufferline_selected_inactive airline_c_inactive
     let g:bufferline_inactive_highlight = 'airline_c'

autoload/airline/extensions/capslock.vim

@@ -1,4 +1,5 @@
-" MIT License. Copyright (c) 2014 Mathias Andersson.
+" MIT License. Copyright (c) 2014-2020 Mathias Andersson et al.
+" Plugin: https://github.com/tpope/vim-capslock
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -8,10 +9,9 @@ if !exists('*CapsLockStatusline')
 endif
 
 function! airline#extensions#capslock#status()
-  return tolower(CapsLockStatusline()) == '[caps]' ? 'CAPS' : ''
+  return tolower(CapsLockStatusline()) ==# '[caps]' ? get(g:, 'airline#extensions#capslock#symbol', 'CAPS') : ''
 endfunction
 
 function! airline#extensions#capslock#init(ext)
   call airline#parts#define_function('capslock', 'airline#extensions#capslock#status')
 endfunction
-

autoload/airline/extensions/coc.vim

@@ -0,0 +1,54 @@
+" MIT License. Copyright (c) 2019-2020 Peng Guanwen et al.
+" vim: et ts=2 sts=2 sw=2
+" Plugin: https://github.com/neoclide/coc
+
+scriptencoding utf-8
+
+let s:error_symbol = get(g:, 'airline#extensions#coc#error_symbol', 'E:')
+let s:warning_symbol = get(g:, 'airline#extensions#coc#warning_symbol', 'W:')
+
+function! airline#extensions#coc#get_warning() abort
+  return airline#extensions#coc#get('warning')
+endfunction
+
+function! airline#extensions#coc#get_error() abort
+  return airline#extensions#coc#get('error')
+endfunction
+
+function! airline#extensions#coc#get(type) abort
+  if !exists(':CocCommand')
+    return ''
+  endif
+  let _backup = get(g:, 'coc_stl_format', '')
+  let is_err = (a:type  is# 'error')
+  if is_err
+    let g:coc_stl_format = get(g:, 'airline#extensions#coc#stl_format_err', '%E{[%e(#%fe)]}')
+  else
+    let g:coc_stl_format = get(g:, 'airline#extensions#coc#stl_format_warn', '%W{[%w(#%fw)]}')
+  endif
+  let info = get(b:, 'coc_diagnostic_info', {})
+  if empty(info) | return '' | endif
+
+
+  let cnt = get(info, a:type, 0)
+  if !empty(_backup)
+    let g:coc_stl_format = _backup
+  endif
+
+  if empty(cnt)
+    return ''
+  else
+    return (is_err ? s:error_symbol : s:warning_symbol).cnt
+  endif
+endfunction
+
+function! airline#extensions#coc#get_status() abort
+  " Shorten text for windows < 91 characters
+  return airline#util#shorten(get(g:, 'coc_status', ''), 91, 9)
+endfunction
+
+function! airline#extensions#coc#init(ext) abort
+  call airline#parts#define_function('coc_error_count', 'airline#extensions#coc#get_error')
+  call airline#parts#define_function('coc_warning_count', 'airline#extensions#coc#get_warning')
+  call airline#parts#define_function('coc_status', 'airline#extensions#coc#get_status')
+endfunction

autoload/airline/extensions/commandt.vim

@@ -1,4 +1,5 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" Plugin: https://github.com/wincent/command-t
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8

autoload/airline/extensions/csv.vim

@@ -1,4 +1,5 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling, Christian Brabandt et al.
+" Plugin: https://github.com/chrisbra/csv.vim
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -30,4 +31,3 @@ endfunction
 function! airline#extensions#csv#init(ext)
   call a:ext.add_statusline_func('airline#extensions#csv#apply')
 endfunction
-

autoload/airline/extensions/ctrlp.vim

@@ -1,4 +1,5 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" Plugin: https://github.com/ctrlpvim/ctrlp.vim
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -79,4 +80,3 @@ function! airline#extensions#ctrlp#init(ext)
   call a:ext.add_statusline_func('airline#extensions#ctrlp#apply')
   call a:ext.add_theme_func('airline#extensions#ctrlp#load_theme')
 endfunction
-

autoload/airline/extensions/ctrlspace.vim

@@ -1,19 +1,21 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" Plugin: https://github.com/szw/vim-ctrlspace
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
 
-let s:spc = g:airline_symbols.space
-let s:padding = s:spc . s:spc . s:spc
+function! airline#extensions#ctrlspace#statusline(...) abort
+  let spc = g:airline_symbols.space
+  let l:padding = spc . spc . spc
+  let cs = ctrlspace#context#Configuration().Symbols.CS
 
-function! airline#extensions#ctrlspace#statusline(...)
   let b = airline#builder#new({ 'active': 1 })
-  call b.add_section('airline_b', '⌗' . s:padding . ctrlspace#api#StatuslineModeSegment(s:padding))
+  call b.add_section('airline_b', cs . l:padding . ctrlspace#api#StatuslineModeSegment(l:padding))
   call b.split()
-  call b.add_section('airline_x', s:spc . ctrlspace#api#StatuslineTabSegment() . s:spc)
+  call b.add_section('airline_x', spc . ctrlspace#api#StatuslineTabSegment() . spc)
   return b.build()
 endfunction
 
-function! airline#extensions#ctrlspace#init(ext)
+function! airline#extensions#ctrlspace#init(ext) abort
   let g:CtrlSpaceStatuslineFunction = "airline#extensions#ctrlspace#statusline()"
 endfunction

autoload/airline/extensions/cursormode.vim

@@ -0,0 +1,122 @@
+" MIT Licsense.
+" Plugin: https://github.com/vheon/vim-cursormode
+" Copyright (C) 2014 Andrea Cedraro <a.cedraro@gmail.com>,
+" Copyright (C) 2017 Eduardo Suarez-Santana <e.suarezsantana@gmail.com>
+
+scriptencoding utf-8
+
+if exists('g:loaded_cursormode')
+  finish
+endif
+
+let g:loaded_cursormode = 1
+
+let s:is_win = has('win32') || has('win64')
+let s:is_iTerm = exists('$TERM_PROGRAM') && $TERM_PROGRAM =~# 'iTerm.app'
+let s:is_AppleTerminal = exists('$TERM_PROGRAM') && $TERM_PROGRAM =~# 'Apple_Terminal'
+
+let s:is_good = !has('gui_running') && !s:is_win && !s:is_AppleTerminal
+
+let s:last_mode = ''
+
+if !exists('g:cursormode_exit_mode')
+  let g:cursormode_exit_mode='n'
+endif
+
+function! airline#extensions#cursormode#tmux_escape(escape)
+  return '\033Ptmux;'.substitute(a:escape, '\\033', '\\033\\033', 'g').'\033\\'
+endfunction
+
+let s:iTerm_escape_template = '\033]Pl%s\033\\'
+let s:xterm_escape_template = '\033]12;%s\007'
+
+function! s:get_mode()
+  return call(get(g:, 'cursormode_mode_func', 'mode'), [])
+endfunction
+
+function! airline#extensions#cursormode#set(...)
+  let mode = s:get_mode()
+  if mode !=# s:last_mode
+    let s:last_mode = mode
+  call s:set_cursor_color_for(mode)
+  endif
+  return ''
+endfunction
+
+function! s:set_cursor_color_for(mode)
+  let mode = a:mode
+  for mode in [a:mode, a:mode.&background]
+    if has_key(s:color_map, mode)
+      try
+        let save_eventignore = &eventignore
+        set eventignore=all
+        let save_shelltemp = &shelltemp
+        set noshelltemp
+
+        silent call system(s:build_command(s:color_map[mode]))
+        return
+      finally
+        let &shelltemp = save_shelltemp
+        let &eventignore = save_eventignore
+      endtry
+    endif
+  endfor
+endfunction
+
+function! s:build_command(color)
+  if s:is_iTerm
+    let color = substitute(a:color, '^#', '', '')
+    let escape_template = s:iTerm_escape_template
+  else
+    let color = a:color
+    let escape_template = s:xterm_escape_template
+  endif
+
+  let escape = printf(escape_template, color)
+  if exists('$TMUX')
+    let escape = airline#extensions#cursormode#tmux_escape(escape)
+  endif
+  return "printf '".escape."' > /dev/tty"
+endfunction
+
+function! s:get_color_map()
+  if exists('g:cursormode_color_map')
+    return g:cursormode_color_map
+  endif
+
+  try
+    let map = g:cursormode#{g:colors_name}#color_map
+    return map
+  catch
+    return {
+          \   "nlight": "#000000",
+          \   "ndark":  "#BBBBBB",
+          \   "i":      "#0000BB",
+          \   "v":      "#FF5555",
+          \   "V":      "#BBBB00",
+          \   "\<C-V>": "#BB00BB",
+          \ }
+  endtry
+endfunction
+
+augroup airline#extensions#cursormode
+  autocmd!
+  autocmd VimLeave * nested call s:set_cursor_color_for(g:cursormode_exit_mode)
+  " autocmd VimEnter * call airline#extensions#cursormode#activate()
+  autocmd Colorscheme * call airline#extensions#cursormode#activate()
+augroup END
+
+function! airline#extensions#cursormode#activate()
+  let s:color_map = s:get_color_map()
+  call airline#extensions#cursormode#set()
+endfunction
+
+function! airline#extensions#cursormode#apply(...)
+  let w:airline_section_a = get(w:, 'airline_section_a', g:airline_section_a)
+  let w:airline_section_a .= '%{airline#extensions#cursormode#set()}'
+endfunction
+
+function! airline#extensions#cursormode#init(ext)
+  let s:color_map = s:get_color_map()
+  call a:ext.add_statusline_func('airline#extensions#cursormode#apply')
+endfunction

autoload/airline/extensions/default.vim

@@ -1,4 +1,4 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -19,7 +19,7 @@ let s:layout = get(g:, 'airline#extensions#default#layout', [
 
 function! s:get_section(winnr, key, ...)
   if has_key(s:section_truncate_width, a:key)
-    if winwidth(a:winnr) < s:section_truncate_width[a:key]
+    if airline#util#winwidth(a:winnr) < s:section_truncate_width[a:key]
       return ''
     endif
   endif
@@ -98,4 +98,3 @@ function! airline#extensions#default#apply(builder, context)
 
   return 1
 endfunction
-

autoload/airline/extensions/denite.vim

@@ -1,4 +1,5 @@
-" MIT License. Copyright (c) 2017 Thomas Dy
+" MIT License. Copyright (c) 2017-2020 Thomas Dy et al.
+" Plugin: https://github.com/Shougo/denite.nvim
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -7,41 +8,48 @@ if !get(g:, 'loaded_denite', 0)
   finish
 endif
 
+let s:denite_ver = (exists('*denite#get_status_mode') ? 2 : 3)
 " Denite does not use vim's built-in modal editing but has a custom prompt
 " that implements its own insert/normal mode so we have to handle changing the
 " highlight
-function! airline#extensions#denite#check_denite_mode(bufnr)
-  let l:mode = split(denite#get_status_mode(), ' ')
-  let l:mode = tolower(l:mode[1])
-  if !exists('b:denite_mode_cache') || l:mode != b:denite_mode_cache
-    call airline#highlighter#highlight([l:mode], a:bufnr)
-    let b:denite_mode_cache = l:mode
+function! airline#extensions#denite#check_denite_mode(bufnr) abort
+  if &filetype !=# 'denite' && &filetype !=# 'denite-filter'
+    return ''
+  endif
+
+  if s:denite_ver == 3
+    let mode = split(denite#get_status("mode"), ' ')
+  else
+    let mode = split(denite#get_status_mode(), ' ')
+  endif
+  let mode = tolower(get(mode, 1, ''))
+  if !exists('b:denite_mode_cache') || mode != b:denite_mode_cache
+    call airline#highlighter#highlight([mode], a:bufnr)
+    let b:denite_mode_cache = mode
   endif
   return ''
 endfunction
 
-function! airline#extensions#denite#apply(...)
-  if &ft == 'denite'
+function! airline#extensions#denite#apply(...) abort
+  if &filetype ==# 'denite' || &filetype ==# 'denite-filter'
     let w:airline_skip_empty_sections = 0
     call a:1.add_section('airline_a', ' Denite %{airline#extensions#denite#check_denite_mode('.a:2['bufnr'].')}')
-    call a:1.add_section('airline_c', ' %{denite#get_status_sources()}')
-    call a:1.split()
-    call a:1.add_section('airline_y', ' %{denite#get_status_path()} ')
-    call a:1.add_section('airline_z', ' %{denite#get_status_linenr()} ')
+    if s:denite_ver == 3
+      call a:1.add_section('airline_c', ' %{denite#get_status("sources")}')
+      call a:1.split()
+      call a:1.add_section('airline_y', ' %{denite#get_status("path")} ')
+      call a:1.add_section('airline_z', ' %{denite#get_status("linenr")} ')
+    else
+      call a:1.add_section('airline_c', ' %{denite#get_status_sources()}')
+      call a:1.split()
+      call a:1.add_section('airline_y', ' %{denite#get_status_path()} ')
+      call a:1.add_section('airline_z', ' %{denite#get_status_linenr()} ')
+    endif
     return 1
   endif
 endfunction
 
-function! airline#extensions#denite#init(ext)
+function! airline#extensions#denite#init(ext) abort
   call denite#custom#option('_', 'statusline', 0)
   call a:ext.add_statusline_func('airline#extensions#denite#apply')
-
-  " airline#extensions#denite#apply normally gets called only after the
-  " denite window gets closed, so we have to call airline#update_statusline
-  " ourselves to make sure it's applied when the window is opened.
-  augroup airline_denite
-    autocmd!
-    autocmd FileType denite call airline#update_statusline()
-  augroup END
 endfunction
-

autoload/airline/extensions/dirvish.vim

@@ -0,0 +1,36 @@
+" MIT Licsense
+" Plugin: https://github.com/justinmk/vim-dirvish
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+if !get(g:, 'loaded_dirvish', 0)
+  finish
+endif
+
+let s:spc = g:airline_symbols.space
+
+function! airline#extensions#dirvish#init(ext) abort
+  call a:ext.add_statusline_func('airline#extensions#dirvish#apply')
+endfunction
+
+function! airline#extensions#dirvish#apply(...) abort
+  if &filetype ==# 'dirvish' && exists('b:dirvish')
+    let w:airline_section_a = 'Dirvish'
+
+    let w:airline_section_b = exists('*airline#extensions#branch#get_head')
+      \ ? '%{airline#extensions#branch#get_head()}'
+      \ : ''
+
+    let w:airline_section_c = '%{b:dirvish._dir}'
+
+    let w:airline_section_x = ''
+    let w:airline_section_y = ''
+
+    let current_column_regex = ':%\dv'
+    let w:airline_section_z = join(filter(
+      \   split(get(w:, 'airline_section_z', g:airline_section_z)),
+      \   'v:val !~ current_column_regex'
+      \ ))
+  endif
+endfunction

autoload/airline/extensions/eclim.vim

@@ -1,4 +1,5 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" PLugin: https://eclim.org
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -59,4 +60,3 @@ function! airline#extensions#eclim#init(ext)
   call airline#parts#define_function('eclim', 'airline#extensions#eclim#get_warnings')
   call a:ext.add_statusline_func('airline#extensions#eclim#creat_line')
 endfunction
-

autoload/airline/extensions/example.vim

@@ -1,4 +1,4 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -53,4 +53,3 @@ function! airline#extensions#example#get_cats()
   endfor
   return cats
 endfunction
-

autoload/airline/extensions/fern.vim

@@ -0,0 +1,36 @@
+" MIT License. Copyright (c) 2013-2020
+" Plugin: https://github.com/lambdalisue/fern.vim
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+if !get(g:, 'fern_loaded', 0)
+  finish
+endif
+
+function! airline#extensions#fern#apply(...) abort
+  if (&ft =~# 'fern')
+    let spc = g:airline_symbols.space
+    let fri = fern#fri#parse(expand('%f'))
+
+    call a:1.add_section('airline_a', spc.'fern'.spc)
+    if exists('*airline#extensions#branch#get_head')
+      call a:1.add_section('airline_b', spc.'%{airline#extensions#branch#get_head()}'.spc)
+    else
+      call a:1.add_section('airline_b', '')
+    endif
+    if !(fri.authority =~# '^drawer')
+      let abspath = substitute(fri.path, 'file://', '', '')
+      call a:1.add_section('airline_c', spc.fnamemodify(abspath, ':~'))
+      call a:1.split()
+      if len(get(g:, 'fern#comparators', {}))
+        call a:1.add_section('airline_y', spc.'%{fern#comparator}'.spc)
+      endif
+    endif
+    return 1
+  endif
+endfunction
+
+function! airline#extensions#fern#init(ext) abort
+  let g:fern_force_overwrite_statusline = 0
+  call a:ext.add_statusline_func('airline#extensions#fern#apply')
+endfunction

autoload/airline/extensions/fugitiveline.vim

@@ -0,0 +1,52 @@
+" MIT License. Copyright (c) 2017-2020 Cimbali et al
+" Plugin: https://github.com/tpope/vim-fugitive
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+if !airline#util#has_fugitive()
+  finish
+endif
+
+function! s:ModifierFlags()
+  return (exists("+autochdir") && &autochdir) ? ':p' : ':.'
+endfunction
+
+function! airline#extensions#fugitiveline#bufname()
+  if !exists('b:fugitive_name')
+    let b:fugitive_name = ''
+    try
+      if bufname('%') =~? '^fugitive:' && exists('*FugitiveReal')
+        let b:fugitive_name = FugitiveReal(bufname('%'))
+      elseif exists('b:git_dir') && exists('*fugitive#repo')
+        if get(b:, 'fugitive_type', '') is# 'blob'
+          let b:fugitive_name = fugitive#repo().translate(FugitivePath(@%, ''))
+        endif
+      elseif exists('b:git_dir') && !exists('*fugitive#repo')
+        let buffer = fugitive#buffer()
+        if buffer.type('blob')
+          let b:fugitive_name = buffer.repo().translate(buffer.path('/'))
+        endif
+      endif
+    catch
+    endtry
+  endif
+
+  let fmod = s:ModifierFlags()
+  if empty(b:fugitive_name)
+    return fnamemodify(bufname('%'), fmod)
+  else
+    return fnamemodify(b:fugitive_name, fmod). " [git]"
+  endif
+endfunction
+
+function! airline#extensions#fugitiveline#init(ext)
+  if exists("+autochdir") && &autochdir
+    " if 'acd' is set, vim-airline uses the path section, so we need to redefine this here as well
+    call airline#parts#define_raw('path', '%<%{airline#extensions#fugitiveline#bufname()}%m')
+  else
+    call airline#parts#define_raw('file', '%<%{airline#extensions#fugitiveline#bufname()}%m')
+  endif
+  autocmd ShellCmdPost,CmdwinLeave * unlet! b:fugitive_name
+  autocmd User AirlineBeforeRefresh unlet! b:fugitive_name
+endfunction

autoload/airline/extensions/fzf.vim

@@ -0,0 +1,44 @@
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" Plugin: https://github.com/junegunn/fzf, https://github.com/junegunn/fzf.vim
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+function! airline#extensions#fzf#init(ext) abort
+  " Remove the custom statusline that fzf.vim sets by removing its `FileType
+  " fzf` autocmd. Ideally we'd use `let g:fzf_statusline = 0`, but this
+  " variable is checked *before* airline#extensions#init() is called.
+  augroup _fzf_statusline
+    autocmd!
+  augroup END
+
+  call a:ext.add_statusline_func('airline#extensions#fzf#apply')
+  call a:ext.add_inactive_statusline_func('airline#extensions#fzf#inactive_apply')
+endfunction
+
+function! airline#extensions#fzf#statusline(...) abort
+  let spc = g:airline_symbols.space
+
+  let builder = airline#builder#new({ 'active': 1 })
+  call builder.add_section('airline_a', spc.'FZF'.spc)
+  call builder.add_section('airline_c', '')
+  return builder.build()
+endfunction
+
+function! airline#extensions#fzf#apply(...) abort
+  if &filetype ==# 'fzf'
+    let spc = g:airline_symbols.space
+    call a:1.add_section('airline_a', spc.'FZF'.spc)
+    call a:1.add_section('airline_c', '')
+    return 1
+  endif
+endfunction
+
+function! airline#extensions#fzf#inactive_apply(...) abort
+  if getbufvar(a:2.bufnr, '&filetype') ==# 'fzf'
+    let spc = g:airline_symbols.space
+    call a:1.add_section('airline_a', spc.'FZF'.spc)
+    call a:1.add_section('airline_c', '')
+    return 1
+  endif
+endfunction

autoload/airline/extensions/gen_tags.vim

@@ -0,0 +1,19 @@
+" MIT License. Copyright (c) 2014-2020 Mathias Andersson et al.
+" Written by Kamil Cukrowski 2020
+" Plugin: https://github.com/jsfaint/gen_tags.vim
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+if !(get(g:, 'loaded_gentags#gtags', 0) || get(g:, 'loaded_gentags#ctags', 0))
+  finish
+endif
+
+function! airline#extensions#gen_tags#status(...) abort
+  return gen_tags#job#is_running() != 0 ? 'Gen. gen_tags' : ''
+endfunction
+
+function! airline#extensions#gen_tags#init(ext) abort
+  call airline#parts#define_function('gen_tags', 'airline#extensions#gen_tags#status')
+endfunction
+

autoload/airline/extensions/gina.vim

@@ -0,0 +1,24 @@
+" MIT License. Copyright (c) 2013-2020
+" Plugin: https://github.com/lambdalisue/gina.vim
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+if !get(g:, 'loaded_gina', 0)
+  finish
+endif
+
+function! airline#extensions#gina#apply(...) abort
+  if (&ft =~# 'gina' && &ft !~# 'blame') || &ft ==# 'diff'
+    call a:1.add_section('airline_a', ' gina ')
+    call a:1.add_section('airline_b', ' %{gina#component#repo#branch()} ')
+    call a:1.split()
+    call a:1.add_section('airline_y', ' staged %{gina#component#status#staged()} ')
+    call a:1.add_section('airline_z', ' unstaged %{gina#component#status#unstaged()} ')
+    return 1
+  endif
+endfunction
+
+function! airline#extensions#gina#init(ext) abort
+  let g:gina_force_overwrite_statusline = 0
+  call a:ext.add_statusline_func('airline#extensions#gina#apply')
+endfunction

autoload/airline/extensions/grepper.vim

@@ -0,0 +1,18 @@
+" MIT License. Copyright (c) 2014-2020 Mathias Andersson et al.
+" Plugin: https://github.com/mhinz/vim-grepper
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+if !get(g:, 'loaded_grepper', 0)
+  finish
+endif
+
+function! airline#extensions#grepper#status()
+  let msg = grepper#statusline()
+  return empty(msg) ? '' : 'grepper'
+endfunction
+
+function! airline#extensions#grepper#init(ext)
+  call airline#parts#define_function('grepper', 'airline#extensions#grepper#status')
+endfunction

autoload/airline/extensions/gutentags.vim

@@ -0,0 +1,18 @@
+" MIT License. Copyright (c) 2014-2020 Mathias Andersson et al.
+" Plugin: https://github.com/ludovicchabant/vim-gutentags
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+if !get(g:, 'loaded_gutentags', 0)
+  finish
+endif
+
+function! airline#extensions#gutentags#status()
+  let msg = gutentags#statusline()
+  return empty(msg) ? '' :  'Gen. ' . msg
+endfunction
+
+function! airline#extensions#gutentags#init(ext)
+  call airline#parts#define_function('gutentags', 'airline#extensions#gutentags#status')
+endfunction

autoload/airline/extensions/hunks.vim

@@ -1,16 +1,32 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" Plugin: vim-gitgutter, vim-signify, changesPlugin, quickfixsigns, coc-git
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
 
-if !get(g:, 'loaded_signify', 0) && !get(g:, 'loaded_gitgutter', 0) && !get(g:, 'loaded_changes', 0) && !get(g:, 'loaded_quickfixsigns', 0)
+if !get(g:, 'loaded_signify', 0)
+  \ && !get(g:, 'loaded_gitgutter', 0)
+  \ && !get(g:, 'loaded_changes', 0)
+  \ && !get(g:, 'loaded_quickfixsigns', 0)
+  \ && !exists("*CocAction")
   finish
 endif
 
 let s:non_zero_only = get(g:, 'airline#extensions#hunks#non_zero_only', 0)
 let s:hunk_symbols = get(g:, 'airline#extensions#hunks#hunk_symbols', ['+', '~', '-'])
 
-function! s:get_hunks_signify()
+function! s:coc_git_enabled() abort
+  if !exists("*CocAction") ||
+   \ !get(g:, 'airline#extensions#hunks#coc_git', 0)
+     " coc-git extension is disabled by default
+     " unless specifically being enabled by the user
+     " (as requested from coc maintainer)
+    return 0
+  endif
+  return 1
+endfunction
+
+function! s:get_hunks_signify() abort
   let hunks = sy#repo#get_stats()
   if hunks[0] >= 0
     return hunks
@@ -18,35 +34,46 @@ function! s:get_hunks_signify()
   return []
 endfunction
 
-function! s:is_branch_empty()
-  return exists('*airline#extensions#branch#head') && empty(airline#extensions#branch#head())
+function! s:get_hunks_coc() abort
+  let hunks = get(b:, 'coc_git_status', '')
+  if empty(hunks)
+    return []
+  endif
+  let result = [0, 0, 0]
+  for val in split(hunks)
+    if val[0] is# '+'
+     let result[0] = val[1:] + 0
+    elseif val[0] is# '~'
+     let result[1] = val[1:] + 0
+    elseif val[0] is# '-'
+      let result[2] = val[1:] + 0
+    endif
+  endfor
+  return result
 endfunction
 
-function! s:get_hunks_gitgutter()
+function! s:is_branch_empty() abort
+  return exists('*airline#extensions#branch#head') &&
+        \ empty(get(b:, 'airline_head', ''))
+endfunction
+
+function! s:get_hunks_gitgutter() abort
   if !get(g:, 'gitgutter_enabled', 0) || s:is_branch_empty()
     return ''
   endif
   return GitGutterGetHunkSummary()
 endfunction
 
-function! s:get_hunks_changes()
-  if !get(b:, 'changes_view_enabled', 0) || s:is_branch_empty()
-    return []
-  endif
+function! s:get_hunks_changes() abort
   let hunks = changes#GetStats()
-  for i in hunks
-    if i > 0
-      return hunks
-    endif
-  endfor
-  return []
+  return hunks == [0, 0, 0] ? [] : hunks
 endfunction
 
-function! s:get_hunks_empty()
+function! s:get_hunks_empty() abort
   return ''
 endfunction
 
-function! s:get_hunks()
+function! airline#extensions#hunks#get_raw_hunks() abort
   if !exists('b:source_func') || get(b:, 'source_func', '') is# 's:get_hunks_empty'
     if get(g:, 'loaded_signify') && sy#buffer_is_active()
       let b:source_func = 's:get_hunks_signify'
@@ -56,6 +83,8 @@ function! s:get_hunks()
       let b:source_func = 's:get_hunks_changes'
     elseif exists('*quickfixsigns#vcsdiff#GetHunkSummary')
       let b:source_func = 'quickfixsigns#vcsdiff#GetHunkSummary'
+    elseif s:coc_git_enabled()
+      let b:source_func = 's:get_hunks_coc'
     else
       let b:source_func = 's:get_hunks_empty'
     endif
@@ -63,34 +92,43 @@ function! s:get_hunks()
   return {b:source_func}()
 endfunction
 
-function! airline#extensions#hunks#get_hunks()
+function! airline#extensions#hunks#get_hunks() abort
   if !get(w:, 'airline_active', 0)
     return ''
   endif
-  " Cache vavlues, so that it isn't called too often
+  " Cache values, so that it isn't called too often
   if exists("b:airline_hunks") &&
-    \ get(b:,  'airline_changenr', 0) == changenr() &&
-    \ winwidth(0) == get(s:, 'airline_winwidth', 0) &&
+    \ get(b:,  'airline_changenr', 0) == b:changedtick &&
+    \ airline#util#winwidth() == get(s:, 'airline_winwidth', 0) &&
     \ get(b:, 'source_func', '') isnot# 's:get_hunks_signify' &&
     \ get(b:, 'source_func', '') isnot# 's:get_hunks_gitgutter' &&
-    \ get(b:, 'source_func', '') isnot# 's:get_hunks_empty'
+    \ get(b:, 'source_func', '') isnot# 's:get_hunks_empty' &&
+    \ get(b:, 'source_func', '') isnot# 's:get_hunks_changes' &&
+    \ get(b:, 'source_func', '') isnot# 's:get_hunks_coc'
     return b:airline_hunks
   endif
-  let hunks = s:get_hunks()
+  let hunks = airline#extensions#hunks#get_raw_hunks()
   let string = ''
+  let winwidth = get(airline#parts#get('hunks'), 'minwidth', 100)
   if !empty(hunks)
+    " hunks should contain [added, changed, deleted]
     for i in [0, 1, 2]
-      if (s:non_zero_only == 0 && winwidth(0) > 100) || hunks[i] > 0
+      if (s:non_zero_only == 0 && airline#util#winwidth() > winwidth) || hunks[i] > 0
         let string .= printf('%s%s ', s:hunk_symbols[i], hunks[i])
       endif
     endfor
   endif
+  if index(airline#extensions#get_loaded_extensions(), 'branch') == -1 && string[-1:] == ' '
+    " branch extension not loaded, skip trailing whitespace
+    let string = string[0:-2]
+  endif
+
   let b:airline_hunks = string
-  let b:airline_changenr = changenr()
-  let s:airline_winwidth = winwidth(0)
+  let b:airline_changenr = b:changedtick
+  let s:airline_winwidth = airline#util#winwidth()
   return string
 endfunction
 
-function! airline#extensions#hunks#init(ext)
+function! airline#extensions#hunks#init(ext) abort
   call airline#parts#define_function('hunks', 'airline#extensions#hunks#get_hunks')
 endfunction

autoload/airline/extensions/keymap.vim

@@ -0,0 +1,31 @@
+" MIT License. Copyright (c) 2013-2020 Doron Behar, C.Brabandt et al.
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+if !has('keymap')
+  finish
+endif
+
+function! airline#extensions#keymap#status()
+  if (get(g:, 'airline#extensions#keymap#enabled', 1) && has('keymap'))
+    let short_codes = get(g:, 'airline#extensions#keymap#short_codes', {})
+    let label = get(g:, 'airline#extensions#keymap#label', g:airline_symbols.keymap)
+    let default = get(g:, 'airline#extensions#keymap#default', '')
+    if (label !=# '')
+      let label .= ' '
+    endif
+    let keymap = &keymap
+    if has_key(short_codes, keymap)
+      let keymap = short_codes[keymap]
+    endif
+    return printf('%s', (!empty(keymap) && &iminsert ? (label . keymap) :
+          \ (!empty(default) ? label . default : default)))
+  else
+    return ''
+  endif
+endfunction
+
+function! airline#extensions#keymap#init(ext)
+  call airline#parts#define_function('keymap', 'airline#extensions#keymap#status')
+endfunction

autoload/airline/extensions/languageclient.vim

@@ -0,0 +1,109 @@
+" MIT License. Copyright (c) 2013-2020 Bjorn Neergaard, hallettj et al.
+" Plugin: https://github.com/autozimu/LanguageClient-neovim
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+let s:error_symbol = get(g:, 'airline#extensions#languageclient#error_symbol', 'E:')
+let s:warning_symbol = get(g:, 'airline#extensions#languageclient#warning_symbol', 'W:')
+let s:show_line_numbers = get(g:, 'airline#extensions#languageclient#show_line_numbers', 1)
+
+" Severity codes from the LSP spec
+let s:severity_error = 1
+let s:severity_warning = 2
+let s:severity_info = 3
+let s:severity_hint = 4
+
+" After each LanguageClient state change `s:diagnostics` will be populated with
+" a map from file names to lists of errors, warnings, informational messages,
+" and hints.
+let s:diagnostics = {}
+
+function! s:languageclient_refresh()
+  if get(g:, 'airline_skip_empty_sections', 0)
+    exe ':AirlineRefresh!'
+  endif
+endfunction
+
+function! s:record_diagnostics(state)
+  " The returned message might not have the 'result' key
+  if has_key(a:state, 'result')
+    let result = json_decode(a:state.result)
+    let s:diagnostics = result.diagnostics
+  endif
+  call s:languageclient_refresh()
+endfunction
+
+function! s:get_diagnostics()
+  call LanguageClient#getState(function("s:record_diagnostics"))
+endfunction
+
+function! s:diagnostics_for_buffer()
+  return get(s:diagnostics, expand('%:p'), [])
+endfunction
+
+function! s:airline_languageclient_count(cnt, symbol)
+  return a:cnt ? a:symbol. a:cnt : ''
+endfunction
+
+function! s:airline_languageclient_get_line_number(type) abort
+  let linenumber_of_first_problem = 0
+  for d in s:diagnostics_for_buffer()
+    if has_key(d, 'severity') && d.severity == a:type
+      let linenumber_of_first_problem = d.range.start.line
+      break
+    endif
+  endfor
+
+  if linenumber_of_first_problem == 0
+    return ''
+  endif
+
+  let open_lnum_symbol  = get(g:, 'airline#extensions#languageclient#open_lnum_symbol', '(L')
+  let close_lnum_symbol = get(g:, 'airline#extensions#languageclient#close_lnum_symbol', ')')
+
+  return open_lnum_symbol . linenumber_of_first_problem . close_lnum_symbol
+endfunction
+
+function! airline#extensions#languageclient#get(type)
+  if get(b:, 'LanguageClient_isServerRunning', 0) ==# 0
+    return ''
+  endif
+
+  let is_err = a:type == s:severity_error
+  let symbol = is_err ? s:error_symbol : s:warning_symbol
+
+  let cnt = 0
+  for d in s:diagnostics_for_buffer()
+    if has_key(d, 'severity') && d.severity == a:type
+      let cnt += 1
+    endif
+  endfor
+
+  if cnt == 0
+    return ''
+  endif
+
+  if s:show_line_numbers == 1
+    return s:airline_languageclient_count(cnt, symbol) . <sid>airline_languageclient_get_line_number(a:type)
+  else
+    return s:airline_languageclient_count(cnt, symbol)
+  endif
+endfunction
+
+function! airline#extensions#languageclient#get_warning()
+  return airline#extensions#languageclient#get(s:severity_warning)
+endfunction
+
+function! airline#extensions#languageclient#get_error()
+  return airline#extensions#languageclient#get(s:severity_error)
+endfunction
+
+function! airline#extensions#languageclient#init(ext)
+  call airline#parts#define_function('languageclient_error_count', 'airline#extensions#languageclient#get_error')
+  call airline#parts#define_function('languageclient_warning_count', 'airline#extensions#languageclient#get_warning')
+  augroup airline_languageclient
+    autocmd!
+    autocmd User LanguageClientDiagnosticsChanged call <sid>get_diagnostics()
+  augroup END
+endfunction

autoload/airline/extensions/localsearch.vim

@@ -0,0 +1,41 @@
+" MIT License. Copyright (c) 2018-2020 mox et al.
+" Plugin: https://github.com/mox-mox/vim-localsearch
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+let s:enabled = get(g:, 'airline#extensions#localsearch#enabled', 1)
+if !get(g:, 'loaded_localsearch', 0) || !s:enabled || get(g:, 'airline#extensions#localsearch#loaded', 0)
+  finish
+endif
+let g:airline#extensions#localsearch#loaded = 001
+
+let s:spc = g:airline_symbols.space
+
+let g:airline#extensions#localsearch#inverted = get(g:, 'airline#extensions#localsearch#inverted', 0)
+
+function! airline#extensions#localsearch#load_theme(palette) abort
+  call airline#highlighter#exec('localsearch_dark', [ '#ffffff' , '#000000' , 15  , 1 , ''])
+endfunction
+
+
+function! airline#extensions#localsearch#init(ext) abort
+  call a:ext.add_theme_func('airline#extensions#localsearch#load_theme')
+  call a:ext.add_statusline_func('airline#extensions#localsearch#apply')
+endfunction
+
+
+function! airline#extensions#localsearch#apply(...) abort
+  " first variable is the statusline builder
+  let builder = a:1
+
+  """"" WARNING: the API for the builder is not finalized and may change
+  if exists('#localsearch#WinEnter') && !g:airline#extensions#localsearch#inverted " If localsearch mode is enabled and 'invert' option is false
+    call builder.add_section('localsearch_dark', s:spc.airline#section#create('LS').s:spc)
+  endif
+  if !exists('#localsearch#WinEnter') && g:airline#extensions#localsearch#inverted " If localsearch mode is disabled and 'invert' option is true
+    call builder.add_section('localsearch_dark', s:spc.airline#section#create('GS').s:spc)
+  endif
+  return 0
+endfunction
+

autoload/airline/extensions/lsp.vim

@@ -0,0 +1,67 @@
+" MIT License. Copyright (c) 2013-2020 François-Xavier Carton et al.
+" Plugin: https://github.com/prabirshrestha/vim-lsp
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+if !get(g:, 'lsp_loaded', 0)
+  finish
+endif
+
+function! s:airline_lsp_count(cnt, symbol) abort
+  return a:cnt ? a:symbol. a:cnt : ''
+endfunction
+
+function! s:airline_lsp_get_line_number(cnt, type) abort
+  let result = ''
+
+  if a:type ==# 'error'
+    let result = lsp#get_buffer_first_error_line()
+  endif
+
+  if empty(result)
+      return ''
+  endif
+
+  let open_lnum_symbol  =
+    \ get(g:, 'airline#extensions#lsp#open_lnum_symbol', '(L')
+  let close_lnum_symbol =
+    \ get(g:, 'airline#extensions#lsp#close_lnum_symbol', ')')
+
+  return open_lnum_symbol . result . close_lnum_symbol
+endfunction
+
+function! airline#extensions#lsp#get(type) abort
+  if !exists(':LspDeclaration')
+    return ''
+  endif
+
+  let error_symbol = get(g:, 'airline#extensions#lsp#error_symbol', 'E:')
+  let warning_symbol = get(g:, 'airline#extensions#lsp#warning_symbol', 'W:')
+  let show_line_numbers = get(g:, 'airline#extensions#lsp#show_line_numbers', 1)
+
+  let is_err = a:type ==# 'error'
+
+  let symbol = is_err ? error_symbol : warning_symbol
+
+  let num = lsp#get_buffer_diagnostics_counts()[a:type]
+
+  if show_line_numbers == 1
+    return s:airline_lsp_count(num, symbol) . <sid>airline_lsp_get_line_number(num, a:type)
+  else
+    return s:airline_lsp_count(num, symbol)
+  endif
+endfunction
+
+function! airline#extensions#lsp#get_warning() abort
+  return airline#extensions#lsp#get('warning')
+endfunction
+
+function! airline#extensions#lsp#get_error() abort
+  return airline#extensions#lsp#get('error')
+endfunction
+
+function! airline#extensions#lsp#init(ext) abort
+  call airline#parts#define_function('lsp_error_count', 'airline#extensions#lsp#get_error')
+  call airline#parts#define_function('lsp_warning_count', 'airline#extensions#lsp#get_warning')
+endfunction

autoload/airline/extensions/neomake.vim

@@ -1,3 +1,5 @@
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" Plugin: https://github.com/neomake/neomake
 " vim: et ts=2 sts=2 sw=2
 
 if !exists(':Neomake')
@@ -7,14 +9,24 @@ endif
 let s:error_symbol = get(g:, 'airline#extensions#neomake#error_symbol', 'E:')
 let s:warning_symbol = get(g:, 'airline#extensions#neomake#warning_symbol', 'W:')
 
+function! s:get_counts()
+  let l:counts = neomake#statusline#LoclistCounts()
+
+  if empty(l:counts)
+    return neomake#statusline#QflistCounts()
+  else
+    return l:counts
+  endif
+endfunction
+
 function! airline#extensions#neomake#get_warnings()
-  let counts = neomake#statusline#LoclistCounts()
+  let counts = s:get_counts()
   let warnings = get(counts, 'W', 0)
   return warnings ? s:warning_symbol.warnings : ''
 endfunction
 
 function! airline#extensions#neomake#get_errors()
-  let counts = neomake#statusline#LoclistCounts()
+  let counts = s:get_counts()
   let errors = get(counts, 'E', 0)
   return errors ? s:error_symbol.errors : ''
 endfunction

autoload/airline/extensions/netrw.vim

@@ -1,4 +1,5 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" Plugin: http://www.drchip.org/astronaut/vim/#NETRW
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -30,5 +31,5 @@ endfunction
 
 function! airline#extensions#netrw#sortstring()
   let order = (get(g:, 'netrw_sort_direction', 'n') =~ 'n') ? '+' : '-'
-  return g:netrw_sort_by . (g:airline_symbols.space) . '[' . order . ']'
+  return get(g:, 'netrw_sort_by', '') . (g:airline_symbols.space) . '[' . order . ']'
 endfunction

autoload/airline/extensions/nrrwrgn.vim

@@ -1,4 +1,5 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling, Christian Brabandt et al.
+" Plugin: https://github.com/chrisbra/NrrwRgn
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -19,7 +20,7 @@ function! airline#extensions#nrrwrgn#apply(...)
       let dict=nrrwrgn#NrrwRgnStatus()
       let vmode = { 'v': 'Char ', 'V': 'Line ', '': 'Block '}
       let mode = dict.visual ? vmode[dict.visual] : vmode['V']
-      let winwidth = winwidth(0)
+      let winwidth = airline#util#winwidth()
       if winwidth < 80
         let mode = mode[0]
       endif

autoload/airline/extensions/nvimlsp.vim

@@ -0,0 +1,48 @@
+" Apache 2.0 license. Copyright (c) 2019-2020 Copyright Neovim contributors.
+" Plugin: https://github.com/neovim/nvim-lsp
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+if !(get(g:, 'airline#extensions#nvimlsp#enabled', 1)
+      \ && exists(':LspInstallInfo'))
+  finish
+endif
+
+function! s:airline_nvimlsp_count(cnt, symbol) abort
+  return a:cnt ? a:symbol. a:cnt : ''
+endfunction
+
+function! airline#extensions#nvimlsp#get(type) abort
+  if !exists(':LspInstallInfo')
+    return ''
+  endif
+
+  let error_symbol = get(g:, 'airline#extensions#nvimlsp#error_symbol', 'E:')
+  let warning_symbol = get(g:, 'airline#extensions#nvimlsp#warning_symbol', 'W:')
+
+  let is_err = a:type ==# 'Error'
+
+  let symbol = is_err ? error_symbol : warning_symbol
+
+  if luaeval("pcall(require, 'vim.lsp.diagnostic')")
+    let num = v:lua.vim.lsp.diagnostic.get_count(0, a:type)
+  else
+    let num = v:lua.vim.lsp.util.buf_diagnostics_count(a:type)
+  endif
+
+  return s:airline_nvimlsp_count(num, symbol)
+endfunction
+
+function! airline#extensions#nvimlsp#get_warning() abort
+  return airline#extensions#nvimlsp#get('Warning')
+endfunction
+
+function! airline#extensions#nvimlsp#get_error() abort
+  return airline#extensions#nvimlsp#get('Error')
+endfunction
+
+function! airline#extensions#nvimlsp#init(ext) abort
+  call airline#parts#define_function('nvimlsp_error_count', 'airline#extensions#nvimlsp#get_error')
+  call airline#parts#define_function('nvimlsp_warning_count', 'airline#extensions#nvimlsp#get_warning')
+endfunction

autoload/airline/extensions/obsession.vim

@@ -1,3 +1,5 @@
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" Plugin: https://github.com/tpope/vim-obsession
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -19,4 +21,3 @@ endfunction
 function! airline#extensions#obsession#get_status()
   return ObsessionStatus((g:airline#extensions#obsession#indicator_text . s:spc), '')
 endfunction
-

autoload/airline/extensions/omnisharp.vim

@@ -0,0 +1,45 @@
+" MIT License
+" Plugin: https://github.com/OmniSharp/omnisharp-vim
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+if !get(g:, 'OmniSharp_loaded', 0)
+  finish
+endif
+
+function! airline#extensions#omnisharp#server_status(...) abort
+  if !exists(':OmniSharpGotoDefinition') || !get(g:, 'OmniSharp_server_stdio', 0)
+    return ''
+  endif
+
+  let host = OmniSharp#GetHost(bufnr('%'))
+  if type(host.job) != v:t_dict || get(host.job, 'stopped')
+    return ''
+  endif
+
+  let sln = fnamemodify(host.sln_or_dir, ':t')
+
+  if get(host.job, 'loaded', 0)
+    return sln
+  endif
+
+  try
+    let projectsloaded = OmniSharp#project#CountLoaded()
+    let projectstotal = OmniSharp#project#CountTotal()
+  catch
+    " The CountLoaded and CountTotal functions are very new - catch the error
+    " when they don't exist
+    let projectsloaded = 0
+    let projectstotal = 0
+  endtry
+  return printf('%s(%d/%d)', sln, projectsloaded, projectstotal)
+endfunction
+
+function! airline#extensions#omnisharp#init(ext) abort
+  call airline#parts#define_function('omnisharp', 'airline#extensions#omnisharp#server_status')
+  augroup airline_omnisharp
+    autocmd!
+    autocmd User OmniSharpStarted,OmniSharpReady,OmniSharpStopped AirlineRefresh!
+  augroup END
+endfunction

autoload/airline/extensions/po.vim

@@ -1,66 +1,62 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling, Christian Brabandt et al.
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
 
-let s:has_async = airline#util#async
-
-function! s:shorten()
+function! airline#extensions#po#shorten()
+  " Format and shorte the output of msgfmt
+  let b:airline_po_stats = substitute(get(b:, 'airline_po_stats', ''), ' \(message\|translation\)s*\.*', '', 'g')
+  let b:airline_po_stats = substitute(b:airline_po_stats, ', ', '/', 'g')
   if exists("g:airline#extensions#po#displayed_limit")
     let w:displayed_po_limit = g:airline#extensions#po#displayed_limit
     if len(b:airline_po_stats) > w:displayed_po_limit - 1
-      let b:airline_po_stats = b:airline_po_stats[0:(w:displayed_po_limit - 2)].(&encoding==?'utf-8' ? '…' : '.'). ']'
+      let b:airline_po_stats = b:airline_po_stats[0:(w:displayed_po_limit - 2)].(&encoding==?'utf-8' ? '…' : '.')
     endif
   endif
-endfunction
-
-if s:has_async
-  let s:jobs = {}
-
-  function! s:on_stdout(channel, msg) dict abort
-    let self.buf = a:msg
-  endfunction
-
-  function! s:on_exit(channel) dict abort
-    if !empty(self.buf)
-      let b:airline_po_stats = printf("[%s]", self.buf)
-    else
-      let b:airline_po_stats = ''
-    endif
-    if has_key(s:jobs, self.file)
-      call remove(s:jobs, self.file)
-    endif
-    call s:shorten()
-  endfunction
-
-  function! s:get_msgfmt_stat_async(cmd, file)
-    if g:airline#util#is_windows || !executable('msgfmt')
-      " no msgfmt on windows?
-      return
-    else
-      let cmd = ['sh', '-c', a:cmd. shellescape(a:file)]
-    endif
-
-    let options = {'buf': '', 'file': a:file}
-    if has_key(s:jobs, a:file)
-      if job_status(get(s:jobs, a:file)) == 'run'
-        return
-      elseif has_key(s:jobs, a:file)
-        call remove(s:jobs, a:file)
+  if strlen(get(b:, 'airline_po_stats', '')) >= 30 && airline#util#winwidth() < 150
+    let fuzzy = ''
+    let untranslated = ''
+    let messages = ''
+    " Shorten [120 translated, 50 fuzzy, 4 untranslated] to [120T/50F/4U]
+    if b:airline_po_stats =~ 'fuzzy'
+      let fuzzy = substitute(b:airline_po_stats, '.\{-}\(\d\+\) fuzzy.*', '\1F', '')
+      if fuzzy == '0F'
+        let fuzzy = ''
       endif
     endif
-    let id = job_start(cmd, {
-          \ 'err_io':   'out',
-          \ 'out_cb':   function('s:on_stdout', options),
-          \ 'close_cb': function('s:on_exit', options)})
-    let s:jobs[a:file] = id
-  endfu
-endif
+    if b:airline_po_stats =~ 'untranslated'
+      let untranslated = substitute(b:airline_po_stats, '.\{-}\(\d\+\) untranslated.*', '\1U', '')
+      if untranslated == '0U'
+        let untranslated = ''
+      endif
+    endif
+    let messages = substitute(b:airline_po_stats, '\(\d\+\) translated.*', '\1T', '')
+      if messages ==# '0T'
+        let messages = ''
+      endif
+    let b:airline_po_stats = printf('%s%s%s', fuzzy, (empty(fuzzy) || empty(untranslated) ? '' : '/'), untranslated)
+    if strlen(b:airline_po_stats) < 10
+      let b:airline_po_stats = messages. (!empty(b:airline_po_stats) && !empty(messages) ? '/':''). b:airline_po_stats
+    endif
+  endif
+  let b:airline_po_stats = '['.b:airline_po_stats. '] '
+endfunction
+
+function! airline#extensions#po#on_winenter()
+  " only reset cache, if the window size changed
+  if get(b:, 'airline_winwidth', 0) != airline#util#winwidth()
+    let b:airline_winwidth = airline#util#winwidth()
+    " needs re-formatting
+    unlet! b:airline_po_stats
+  endif
+endfunction
 
 function! airline#extensions#po#apply(...)
   if &ft ==# 'po'
     call airline#extensions#prepend_to_section('z', '%{airline#extensions#po#stats()}')
+    " Also reset the cache variable, if a window has been split, e.g. the winwidth changed
     autocmd airline BufWritePost * unlet! b:airline_po_stats
+    autocmd airline WinEnter * call airline#extensions#po#on_winenter()
   endif
 endfunction
 
@@ -69,21 +65,26 @@ function! airline#extensions#po#stats()
     return b:airline_po_stats
   endif
 
-  let cmd = 'msgfmt --statistics -o /dev/null -- '
-  if s:has_async
-    call s:get_msgfmt_stat_async(cmd, expand('%:p'))
+  if g:airline#init#is_windows
+    let cmd = 'msgfmt --statistics -o NUL '
+  else
+    let cmd = 'msgfmt --statistics -o /dev/null -- '
+  endif
+  if g:airline#init#vim_async
+    call airline#async#get_msgfmt_stat(cmd, expand('%:p'))
+  elseif has("nvim")
+    call airline#async#nvim_get_msgfmt_stat(cmd, expand('%:p'))
   else
     let airline_po_stats = system(cmd. shellescape(expand('%:p')))
     if v:shell_error
       return ''
     endif
     try
-      let b:airline_po_stats = '['. split(airline_po_stats, '\n')[0]. ']'
-      let b:airline_po_stats = substitute(b:airline_po_stats, ' \(message\|translation\)s*\.*', '', 'g')
+      let b:airline_po_stats = split(airline_po_stats, '\n')[0]
     catch
       let b:airline_po_stats = ''
     endtry
-    call s:shorten()
+    call airline#extensions#po#shorten()
   endif
   return get(b:, 'airline_po_stats', '')
 endfunction

autoload/airline/extensions/poetv.vim

@@ -0,0 +1,32 @@
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" Plugin: https://github.com/petobens/poet_v
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+let s:spc = g:airline_symbols.space
+
+function! airline#extensions#poetv#init(ext)
+  call a:ext.add_statusline_func('airline#extensions#poetv#apply')
+endfunction
+
+function! airline#extensions#poetv#apply(...)
+  if &filetype =~# 'python'
+    if get(g:, 'poetv_loaded', 0)
+      let statusline = poetv#statusline()
+    else
+      let statusline = fnamemodify($VIRTUAL_ENV, ':t')
+    endif
+    if !empty(statusline)
+      call airline#extensions#append_to_section('x',
+            \ s:spc.g:airline_right_alt_sep.s:spc.statusline)
+    endif
+  endif
+endfunction
+
+function! airline#extensions#poetv#update()
+  if &filetype =~# 'python'
+    call airline#extensions#poetv#apply()
+    call airline#update_statusline()
+  endif
+endfunction

autoload/airline/extensions/promptline.vim

@@ -1,4 +1,5 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" Plugin: https://github.com/edkolev/promptline.vim
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8

autoload/airline/extensions/quickfix.vim

@@ -1,14 +1,19 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
 
-let g:airline#extensions#quickfix#quickfix_text = 'Quickfix'
-let g:airline#extensions#quickfix#location_text = 'Location'
+if !exists('g:airline#extensions#quickfix#quickfix_text')
+  let g:airline#extensions#quickfix#quickfix_text = 'Quickfix'
+endif
+
+if !exists('g:airline#extensions#quickfix#location_text')
+  let g:airline#extensions#quickfix#location_text = 'Location'
+endif
 
 function! airline#extensions#quickfix#apply(...)
   if &buftype == 'quickfix'
-    let w:airline_section_a = s:get_text()
+    let w:airline_section_a = airline#extensions#quickfix#get_type()
     let w:airline_section_b = '%{get(w:, "quickfix_title", "")}'
     let w:airline_section_c = ''
     let w:airline_section_x = ''
@@ -26,7 +31,7 @@ function! airline#extensions#quickfix#inactive_qf_window(...)
   endif
 endfunction
 
-function! s:get_text()
+function! airline#extensions#quickfix#get_type()
   if exists("*win_getid") && exists("*getwininfo")
     let dict = getwininfo(win_getid())
     if len(dict) > 0 && get(dict[0], 'quickfix', 0) && !get(dict[0], 'loclist', 0)

autoload/airline/extensions/searchcount.vim

@@ -0,0 +1,43 @@
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" This extension is inspired by vim-anzu <https://github.com/osyo-manga/vim-anzu>.
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+if !exists('*searchcount')
+  finish
+endif
+
+function! airline#extensions#searchcount#init(ext) abort
+  call a:ext.add_statusline_func('airline#extensions#searchcount#apply')
+endfunction
+
+function! airline#extensions#searchcount#apply(...) abort
+  call airline#extensions#append_to_section('y',
+        \ '%{v:hlsearch ? airline#extensions#searchcount#status() : ""}')
+endfunction
+
+function! airline#extensions#searchcount#status() abort
+  try
+    let result = searchcount(#{recompute: 1, maxcount: -1})
+    if empty(result) || result.total ==# 0
+      return ''
+    endif
+    if result.incomplete ==# 1     " timed out
+      return printf(' /%s [?/??]', @/)
+    elseif result.incomplete ==# 2 " max count exceeded
+      if result.total > result.maxcount &&
+            \  result.current > result.maxcount
+        return printf('%s[>%d/>%d]', @/,
+              \		    result.current, result.total)
+      elseif result.total > result.maxcount
+        return printf('%s[%d/>%d]', @/,
+              \		    result.current, result.total)
+      endif
+    endif
+    return printf('%s[%d/%d]', @/,
+          \		result.current, result.total)
+  catch
+    return ''
+  endtry
+endfunction

autoload/airline/extensions/syntastic.vim

@@ -1,4 +1,5 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" Plugin: https://github.com/vim-syntastic/syntastic
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -22,15 +23,15 @@ function! airline#extensions#syntastic#get(type)
   let _backup = get(g:, 'syntastic_stl_format', '')
   let is_err = (a:type  is# 'error')
   if is_err
-    let g:syntastic_stl_format = '%E{%e}'
+    let g:syntastic_stl_format = get(g:, 'airline#extensions#syntastic#stl_format_err', '%E{[%fe(#%e)]}')
   else
-    let g:syntastic_stl_format = '%W{%w}'
+    let g:syntastic_stl_format = get(g:, 'airline#extensions#syntastic#stl_format_warn', '%W{[%fw(#%w)]}')
   endif
   let cnt = SyntasticStatuslineFlag()
   if !empty(_backup)
     let g:syntastic_stl_format = _backup
   endif
-  if cnt == 0
+  if empty(cnt)
     return ''
   else
     return (is_err ? s:error_symbol : s:warning_symbol).cnt

autoload/airline/extensions/tabline.vim

@@ -1,193 +1,487 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
-" vim: et ts=2 sts=2 sw=2
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" vim: et ts=2 sts=2 sw=2 et fdm=marker
 
 scriptencoding utf-8
 
-let s:formatter = get(g:, 'airline#extensions#tabline#formatter', 'default')
-let s:show_buffers = get(g:, 'airline#extensions#tabline#show_buffers', 1)
-let s:show_tabs = get(g:, 'airline#extensions#tabline#show_tabs', 1)
-let s:ignore_bufadd_pat = get(g:, 'airline#extensions#tabline#ignore_bufadd_pat', '\c\vgundo|undotree|vimfiler|tagbar|nerd_tree')
-
 let s:taboo = get(g:, 'airline#extensions#taboo#enabled', 1) && get(g:, 'loaded_taboo', 0)
 if s:taboo
   let g:taboo_tabline = 0
 endif
 
 let s:ctrlspace = get(g:, 'CtrlSpaceLoaded', 0)
+let s:tabws = get(g:, 'tabws_loaded', 0)
+let s:current_tabcnt = -1
 
 function! airline#extensions#tabline#init(ext)
-  if has('gui_running')
+  if has('gui_running') && match(&guioptions, 'e') > -1
     set guioptions-=e
   endif
 
   autocmd User AirlineToggledOn call s:toggle_on()
   autocmd User AirlineToggledOff call s:toggle_off()
-
   call s:toggle_on()
   call a:ext.add_theme_func('airline#extensions#tabline#load_theme')
 endfunction
 
-function! s:toggle_off()
-  call airline#extensions#tabline#autoshow#off()
-  call airline#extensions#tabline#tabs#off()
-  call airline#extensions#tabline#buffers#off()
-  call airline#extensions#tabline#ctrlspace#off()
-endfunction
-
-function! s:toggle_on()
-  call airline#extensions#tabline#autoshow#on()
-  call airline#extensions#tabline#tabs#on()
-  call airline#extensions#tabline#buffers#on()
-  call airline#extensions#tabline#ctrlspace#on()
-
-  set tabline=%!airline#extensions#tabline#get()
-endfunction
-
-function! s:update_tabline()
-  if get(g:, 'airline#extensions#tabline#disable_refresh', 0)
-    return
-  endif
-  let match = expand('<afile>')
-  if pumvisible()
-    return
-  elseif !get(g:, 'airline#extensions#tabline#enabled', 0)
-    return
-  " return, if buffer matches ignore pattern or is directory (netrw)
-  elseif empty(match)
-        \ || match(match, s:ignore_bufadd_pat) > -1
-        \ || isdirectory(expand("<afile>"))
-    return
-  endif
-  doautocmd User BufMRUChange
-endfunction
-
-function! airline#extensions#tabline#load_theme(palette)
-  if pumvisible()
-    return
-  endif
-  let colors    = get(a:palette, 'tabline', {})
-  " Theme for tabs on the left
-  let l:tab     = get(colors, 'airline_tab', a:palette.normal.airline_b)
-  let l:tabsel  = get(colors, 'airline_tabsel', a:palette.normal.airline_a)
-  let l:tabtype = get(colors, 'airline_tabtype', a:palette.visual.airline_a)
-  let l:tabfill = get(colors, 'airline_tabfill', a:palette.normal.airline_c)
-  let l:tabmod  = get(colors, 'airline_tabmod', a:palette.insert.airline_a)
-  let l:tabhid  = get(colors, 'airline_tabhid', a:palette.normal.airline_c)
-  if has_key(a:palette, 'normal_modified') && has_key(a:palette.normal_modified, 'airline_c')
-    let l:tabmodu = get(colors, 'airline_tabmod_unsel', a:palette.normal_modified.airline_c)
-  else
-    "Fall back to normal airline_c if modified airline_c isn't present
-    let l:tabmodu = get(colors, 'airline_tabmod_unsel', a:palette.normal.airline_c)
-  endif
-  call airline#highlighter#exec('airline_tab', l:tab)
-  call airline#highlighter#exec('airline_tabsel', l:tabsel)
-  call airline#highlighter#exec('airline_tabtype', l:tabtype)
-  call airline#highlighter#exec('airline_tabfill', l:tabfill)
-  call airline#highlighter#exec('airline_tabmod', l:tabmod)
-  call airline#highlighter#exec('airline_tabmod_unsel', l:tabmodu)
-  call airline#highlighter#exec('airline_tabhid', l:tabhid)
-
-  " Theme for tabs on the right
-  let l:tabsel_right  = get(colors, 'airline_tabsel_right', a:palette.normal.airline_a)
-  let l:tab_right     = get(colors, 'airline_tab_right',    a:palette.inactive.airline_c)
-  let l:tabmod_right  = get(colors, 'airline_tabmod_right', a:palette.insert.airline_a)
-  let l:tabhid_right  = get(colors, 'airline_tabhid_right', a:palette.normal.airline_c)
-  if has_key(a:palette, 'normal_modified') && has_key(a:palette.normal_modified, 'airline_c')
-    let l:tabmodu_right = get(colors, 'airline_tabmod_unsel_right', a:palette.normal_modified.airline_c)
-  else
-    "Fall back to normal airline_c if modified airline_c isn't present
-    let l:tabmodu_right = get(colors, 'airline_tabmod_unsel_right', a:palette.normal.airline_c)
-  endif
-  call airline#highlighter#exec('airline_tab_right',    l:tab_right)
-  call airline#highlighter#exec('airline_tabsel_right', l:tabsel_right)
-  call airline#highlighter#exec('airline_tabmod_right', l:tabmod_right)
-  call airline#highlighter#exec('airline_tabhid_right', l:tabhid_right)
-  call airline#highlighter#exec('airline_tabmod_unsel_right', l:tabmodu_right)
-endfunction
-
-let s:current_tabcnt = -1
-function! airline#extensions#tabline#get()
-  let curtabcnt = tabpagenr('$')
-  if curtabcnt != s:current_tabcnt
-    let s:current_tabcnt = curtabcnt
-    call airline#extensions#tabline#tabs#invalidate()
-    call airline#extensions#tabline#buffers#invalidate()
-    call airline#extensions#tabline#ctrlspace#invalidate()
-  endif
-
-  if !exists('#airline#BufAdd#*')
-    autocmd airline BufAdd * call <sid>update_tabline()
-  endif
-  if s:ctrlspace
-    return airline#extensions#tabline#ctrlspace#get()
-  elseif s:show_buffers && curtabcnt == 1 || !s:show_tabs
-    return airline#extensions#tabline#buffers#get()
-  else
-    return airline#extensions#tabline#tabs#get()
+function! airline#extensions#tabline#add_label(dict, type, right)
+  if get(g:, 'airline#extensions#tabline#show_tab_type', 1)
+    call a:dict.add_section_spaced('airline_tablabel'.
+          \ (a:right ? '_right' : ''),
+          \ get(g:, 'airline#extensions#tabline#'.a:type.'_label', a:type))
   endif
 endfunction
 
-function! airline#extensions#tabline#title(n)
-  let title = ''
-  if s:taboo
-    let title = TabooTabTitle(a:n)
+function! airline#extensions#tabline#add_tab_label(dict)
+  let show_tab_count = get(g:, 'airline#extensions#tabline#show_tab_count', 1)
+  if show_tab_count == 2
+    call a:dict.add_section_spaced('airline_tabmod', printf('%s %d/%d', "tab", tabpagenr(), tabpagenr('$')))
+  elseif show_tab_count == 1 && tabpagenr('$') > 1
+    call a:dict.add_section_spaced('airline_tabmod', printf('%s %d/%d', "tab", tabpagenr(), tabpagenr('$')))
   endif
-
-  if empty(title) && exists('*gettabvar')
-    let title = gettabvar(a:n, 'title')
-  endif
-
-  if empty(title)
-    let buflist = tabpagebuflist(a:n)
-    let winnr = tabpagewinnr(a:n)
-    let all_buffers = airline#extensions#tabline#buflist#list()
-    return airline#extensions#tabline#get_buffer_name(
-          \ buflist[winnr - 1],
-          \ filter(buflist, 'index(all_buffers, v:val) != -1'))
-  endif
-
-  return title
 endfunction
 
-function! airline#extensions#tabline#get_buffer_name(nr, ...)
-  let buffers = a:0 ? a:1 : airline#extensions#tabline#buflist#list()
-  return airline#extensions#tabline#formatters#{s:formatter}#format(a:nr, buffers)
-endfunction
+if !exists(":def") || (exists(":def") && get(g:, "airline_experimental", 0)==0)
 
-function! airline#extensions#tabline#new_builder()
-  let builder_context = {
-        \ 'active'        : 1,
-        \ 'tabline'       : 1,
-        \ 'right_sep'     : get(g:, 'airline#extensions#tabline#right_sep'    , g:airline_right_sep),
-        \ 'right_alt_sep' : get(g:, 'airline#extensions#tabline#right_alt_sep', g:airline_right_alt_sep),
-        \ }
-  if get(g:, 'airline_powerline_fonts', 0)
-    let builder_context.left_sep     = get(g:, 'airline#extensions#tabline#left_sep'     , g:airline_left_sep)
-    let builder_context.left_alt_sep = get(g:, 'airline#extensions#tabline#left_alt_sep' , g:airline_left_alt_sep)
-  else
-    let builder_context.left_sep     = get(g:, 'airline#extensions#tabline#left_sep'     , ' ')
-    let builder_context.left_alt_sep = get(g:, 'airline#extensions#tabline#left_alt_sep' , '|')
-  endif
-
-  return airline#builder#new(builder_context)
-endfunction
-
-function! airline#extensions#tabline#group_of_bufnr(tab_bufs, bufnr)
-  let cur = bufnr('%')
-  if cur == a:bufnr
-    if g:airline_detect_modified && getbufvar(a:bufnr, '&modified')
-      let group = 'airline_tabmod'
-    else
-      let group = 'airline_tabsel'
+  " Legacy VimScript implementation " {{{1
+  function! s:toggle_off() " {{{2
+    call airline#extensions#tabline#autoshow#off()
+    call airline#extensions#tabline#tabs#off()
+    call airline#extensions#tabline#buffers#off()
+    if s:ctrlspace
+      call airline#extensions#tabline#ctrlspace#off()
     endif
-  else
-    if g:airline_detect_modified && getbufvar(a:bufnr, '&modified')
-      let group = 'airline_tabmod_unsel'
-    elseif index(a:tab_bufs, a:bufnr) > -1
-      let group = 'airline_tab'
-    else
-      let group = 'airline_tabhid'
+    if s:tabws
+      call airline#extensions#tabline#tabws#off()
     endif
-  endif
-  return group
-endfunction
+  endfunction
+  function! s:toggle_on() " {{{2
+    if get(g:, 'airline_statusline_ontop', 0)
+      call airline#extensions#tabline#enable()
+      let &tabline='%!airline#statusline('.winnr().')'
+      return
+    endif
+    call airline#extensions#tabline#autoshow#on()
+    call airline#extensions#tabline#tabs#on()
+    call airline#extensions#tabline#buffers#on()
+    if s:ctrlspace
+      call airline#extensions#tabline#ctrlspace#on()
+    endif
+    if s:tabws
+      call airline#extensions#tabline#tabws#on()
+    endif
+
+    set tabline=%!airline#extensions#tabline#get()
+  endfunction
+  function! s:update_tabline(forceit) " {{{2
+    if get(g:, 'airline#extensions#tabline#disable_refresh', 0)
+      return
+    endif
+    " loading a session file
+    " On SessionLoadPost, g:SessionLoad variable is still set :/
+    if !a:forceit && get(g:, 'SessionLoad', 0)
+      return
+    endif
+    let match = expand('<afile>')
+    if pumvisible()
+      return
+    elseif !get(g:, 'airline#extensions#tabline#enabled', 0)
+      return
+    " return, if buffer matches ignore pattern or is directory (netrw)
+    elseif empty(match) || airline#util#ignore_buf(match) || isdirectory(match)
+      return
+    endif
+    call airline#util#doautocmd('BufMRUChange')
+    call airline#extensions#tabline#redraw()
+  endfunction
+  function! airline#extensions#tabline#redraw() " {{{2
+    " sometimes, the tabline is not correctly updated see #1580
+    " so force redraw here
+    if exists(":redrawtabline") == 2
+      redrawtabline
+    else
+    " Have to set a property equal to itself to get airline to re-eval.
+    " Setting `let &tabline=&tabline` destroys the cursor position so we
+    " need something less invasive.
+      let &ro = &ro
+    endif
+  endfunction
+  function! airline#extensions#tabline#enable() " {{{2
+    if &lines > 3
+      set showtabline=2
+    endif
+  endfunction
+  function! airline#extensions#tabline#load_theme(palette) " {{{2
+    if pumvisible()
+      return
+    endif
+    let colors    = get(a:palette, 'tabline', {})
+    let tablabel  = get(colors, 'airline_tablabel', a:palette.normal.airline_b)
+    " Theme for tabs on the left
+    let tab     = get(colors, 'airline_tab', a:palette.inactive.airline_c)
+    let tabsel  = get(colors, 'airline_tabsel', a:palette.normal.airline_a)
+    let tabtype = get(colors, 'airline_tabtype', a:palette.visual.airline_a)
+    let tabfill = get(colors, 'airline_tabfill', a:palette.normal.airline_c)
+    let tabmod  = get(colors, 'airline_tabmod', a:palette.insert.airline_a)
+    let tabhid  = get(colors, 'airline_tabhid', a:palette.normal.airline_c)
+    if has_key(a:palette, 'normal_modified') && has_key(a:palette.normal_modified, 'airline_c')
+      let tabmodu = get(colors, 'airline_tabmod_unsel', a:palette.normal_modified.airline_c)
+    else
+      "Fall back to normal airline_c if modified airline_c isn't present
+      let tabmodu = get(colors, 'airline_tabmod_unsel', a:palette.normal.airline_c)
+    endif
+    call airline#highlighter#exec('airline_tablabel', tablabel)
+    call airline#highlighter#exec('airline_tab', tab)
+    call airline#highlighter#exec('airline_tabsel', tabsel)
+    call airline#highlighter#exec('airline_tabtype', tabtype)
+    call airline#highlighter#exec('airline_tabfill', tabfill)
+    call airline#highlighter#exec('airline_tabmod', tabmod)
+    call airline#highlighter#exec('airline_tabmod_unsel', tabmodu)
+    call airline#highlighter#exec('airline_tabhid', tabhid)
+
+    " Theme for tabs on the right
+    " label on the right
+    let tablabel_r  = get(colors, 'airline_tablabel', a:palette.normal.airline_b)
+    let tabsel_right  = get(colors, 'airline_tabsel_right', a:palette.normal.airline_a)
+    let tab_right     = get(colors, 'airline_tab_right',    a:palette.inactive.airline_c)
+    let tabmod_right  = get(colors, 'airline_tabmod_right', a:palette.insert.airline_a)
+    let tabhid_right  = get(colors, 'airline_tabhid_right', a:palette.normal.airline_c)
+    if has_key(a:palette, 'normal_modified') && has_key(a:palette.normal_modified, 'airline_c')
+      let tabmodu_right = get(colors, 'airline_tabmod_unsel_right', a:palette.normal_modified.airline_c)
+    else
+      "Fall back to normal airline_c if modified airline_c isn't present
+      let tabmodu_right = get(colors, 'airline_tabmod_unsel_right', a:palette.normal.airline_c)
+    endif
+    call airline#highlighter#exec('airline_tablabel_right', tablabel_r)
+    call airline#highlighter#exec('airline_tab_right',    tab_right)
+    call airline#highlighter#exec('airline_tabsel_right', tabsel_right)
+    call airline#highlighter#exec('airline_tabmod_right', tabmod_right)
+    call airline#highlighter#exec('airline_tabhid_right', tabhid_right)
+    call airline#highlighter#exec('airline_tabmod_unsel_right', tabmodu_right)
+  endfunction
+  function! airline#extensions#tabline#get() " {{{2
+    let show_buffers = get(g:, 'airline#extensions#tabline#show_buffers', 1)
+    let show_tabs = get(g:, 'airline#extensions#tabline#show_tabs', 1)
+
+    let curtabcnt = tabpagenr('$')
+    if curtabcnt != s:current_tabcnt
+      let s:current_tabcnt = curtabcnt
+      call airline#extensions#tabline#tabs#invalidate()
+      call airline#extensions#tabline#buffers#invalidate()
+      call airline#extensions#tabline#ctrlspace#invalidate()
+      call airline#extensions#tabline#tabws#invalidate()
+    endif
+
+    if !exists('#airline#BufAdd#*')
+      autocmd airline BufAdd * call <sid>update_tabline(0)
+    endif
+    if !exists('#airline#SessionLoadPost')
+      autocmd airline SessionLoadPost * call <sid>update_tabline(1)
+    endif
+    if s:ctrlspace
+      return airline#extensions#tabline#ctrlspace#get()
+    elseif s:tabws
+      return airline#extensions#tabline#tabws#get()
+    elseif show_buffers && curtabcnt == 1 || !show_tabs
+      return airline#extensions#tabline#buffers#get()
+    else
+      return airline#extensions#tabline#tabs#get()
+    endif
+  endfunction
+  function! airline#extensions#tabline#title(n) " {{{2
+    let title = ''
+    if s:taboo
+      let title = TabooTabTitle(a:n)
+    endif
+
+    if empty(title) && exists('*gettabvar')
+      let title = gettabvar(a:n, 'title')
+    endif
+
+    let formatter = get(g:, 'airline#extensions#tabline#tabtitle_formatter')
+    if empty(title) && formatter !=# '' && exists("*".formatter)
+      let title = call(formatter, [a:n])
+    endif
+
+    if empty(title)
+      let buflist = tabpagebuflist(a:n)
+      let winnr = tabpagewinnr(a:n)
+      let all_buffers = airline#extensions#tabline#buflist#list()
+      let curbuf = filter(buflist, 'index(all_buffers, v:val) != -1')
+      if len(curbuf) ==  0
+        call add(curbuf, tabpagebuflist()[0])
+      endif
+      return airline#extensions#tabline#get_buffer_name(curbuf[0], curbuf)
+    endif
+    return title
+  endfunction
+  function! airline#extensions#tabline#get_buffer_name(nr, ...) " {{{2
+    let buffers = a:0 ? a:1 : airline#extensions#tabline#buflist#list()
+    let formatter = get(g:, 'airline#extensions#tabline#formatter', 'default')
+    return airline#extensions#tabline#formatters#{formatter}#format(a:nr, buffers)
+  endfunction
+  function! airline#extensions#tabline#new_builder() " {{{2
+    let builder_context = {
+          \ 'active'        : 1,
+          \ 'tabline'       : 1,
+          \ 'right_sep'     : get(g:, 'airline#extensions#tabline#right_sep'    , g:airline_right_sep),
+          \ 'right_alt_sep' : get(g:, 'airline#extensions#tabline#right_alt_sep', g:airline_right_alt_sep),
+          \ }
+    if get(g:, 'airline_powerline_fonts', 0)
+      let builder_context.left_sep     = get(g:, 'airline#extensions#tabline#left_sep'     , g:airline_left_sep)
+      let builder_context.left_alt_sep = get(g:, 'airline#extensions#tabline#left_alt_sep' , g:airline_left_alt_sep)
+    else
+      let builder_context.left_sep     = get(g:, 'airline#extensions#tabline#left_sep'     , ' ')
+      let builder_context.left_alt_sep = get(g:, 'airline#extensions#tabline#left_alt_sep' , '|')
+    endif
+    return airline#extensions#tabline#builder#new(builder_context)
+  endfunction
+  function! airline#extensions#tabline#group_of_bufnr(tab_bufs, bufnr) " {{{2
+    let cur = bufnr('%')
+    if cur == a:bufnr
+      if g:airline_detect_modified && getbufvar(a:bufnr, '&modified')
+        let group = 'airline_tabmod'
+      else
+        let group = 'airline_tabsel'
+      endif
+    else
+      if g:airline_detect_modified && getbufvar(a:bufnr, '&modified')
+        let group = 'airline_tabmod_unsel'
+      elseif index(a:tab_bufs, a:bufnr) > -1
+        let group = 'airline_tab'
+      else
+        let group = 'airline_tabhid'
+      endif
+    endif
+    return group
+  endfunction
+  function! airline#extensions#tabline#add_tab_label(dict) " {{{2
+    let show_tab_count = get(g:, 'airline#extensions#tabline#show_tab_count', 1)
+    if show_tab_count == 2
+      call a:dict.add_section_spaced('airline_tabmod', printf('%s %d/%d', "tab", tabpagenr(), tabpagenr('$')))
+    elseif show_tab_count == 1 && tabpagenr('$') > 1
+      call a:dict.add_section_spaced('airline_tabmod', printf('%s %d/%d', "tab", tabpagenr(), tabpagenr('$')))
+    endif
+  endfunction
+else
+  " Vim9 Script implementation
+  "def airline#extensions#tabline#init(ext: dict<any>): void # {{{2
+  "  Seems not to work yet :(
+  "  if has('gui_running') && match(&guioptions, 'e') > -1
+  "    :set guioptions-=e
+  "  endif
+  "  autocmd User AirlineToggledOn call s:toggle_on()
+  "  autocmd User AirlineToggledOff call s:toggle_off()
+  "  s:toggle_on()
+  "  try
+  "    ext.add_theme_func('airline#extensions#tabline#load_theme')
+  "  catch
+  "  endtry
+  "enddef
+  def s:toggle_off(): void # {{{2
+    airline#extensions#tabline#autoshow#off()
+    airline#extensions#tabline#tabs#off()
+    airline#extensions#tabline#buffers#off()
+    if s:ctrlspace
+      airline#extensions#tabline#ctrlspace#off()
+    endif
+    if s:tabws
+      airline#extensions#tabline#tabws#off()
+    endif
+  enddef
+  def s:toggle_on(): void # {{{2
+    if get(g:, 'airline_statusline_ontop', 0)
+      airline#extensions#tabline#enable()
+      &tabline = '%!airline#statusline(' .. winnr() .. ')'
+      return
+    endif
+    airline#extensions#tabline#autoshow#on()
+    airline#extensions#tabline#tabs#on()
+    airline#extensions#tabline#buffers#on()
+    if s:ctrlspace
+      airline#extensions#tabline#ctrlspace#on()
+    endif
+    if s:tabws
+      airline#extensions#tabline#tabws#on()
+    endif
+    &tabline = '%!airline#extensions#tabline#get()'
+  enddef
+  def s:update_tabline(forceit: number): void # {{{2
+    if get(g:, 'airline#extensions#tabline#disable_refresh', 0)
+      return
+    endif
+    if !forceit && get(g:, 'SessionLoad', 0)
+      return
+    endif
+    var match = expand('<afile>')
+    if pumvisible()
+      return
+    elseif !get(g:, 'airline#extensions#tabline#enabled', 0)
+      return
+    # return, if buffer matches ignore pattern or is directory (netrw)
+    elseif empty(match) || airline#util#ignore_buf(match) || isdirectory(match)
+      return
+    endif
+    airline#util#doautocmd('BufMRUChange')
+    airline#extensions#tabline#redraw()
+  enddef
+  def airline#extensions#tabline#redraw(): void # {{{2
+    # TODO: Is this still needed?
+    :redrawtabline
+  enddef
+  def airline#extensions#tabline#enable(): void # {{{2
+    if &lines > 3
+      &showtabline = 2
+    endif
+  enddef
+  def airline#extensions#tabline#load_theme(palette: dict<any>): void # {{{2
+    if pumvisible()
+      return
+    endif
+    var colors    = get(palette, 'tabline', {})
+    var tablabel  = get(colors, 'airline_tablabel', palette.normal.airline_b)
+    # Theme for tabs on the left
+    var tab     = get(colors, 'airline_tab', palette.inactive.airline_c)
+    var tabsel  = get(colors, 'airline_tabsel', palette.normal.airline_a)
+    var tabtype = get(colors, 'airline_tabtype', palette.visual.airline_a)
+    var tabfill = get(colors, 'airline_tabfill', palette.normal.airline_c)
+    var tabmod  = get(colors, 'airline_tabmod', palette.insert.airline_a)
+    var tabhid  = get(colors, 'airline_tabhid', palette.normal.airline_c)
+    var tabmodu = tabhid
+    var tabmodu_right = tabhid
+    if has_key(palette, 'normal_modified') && has_key(palette.normal_modified, 'airline_c')
+      tabmodu = get(colors, 'airline_tabmod_unsel', palette.normal_modified.airline_c)
+      tabmodu_right = get(colors, 'airline_tabmod_unsel_right', palette.normal_modified.airline_c)
+    else
+      # Fall back to normal airline_c if modified airline_c isn't present
+      tabmodu = get(colors, 'airline_tabmod_unsel', palette.normal.airline_c)
+      tabmodu_right = get(colors, 'airline_tabmod_unsel_right', palette.normal.airline_c)
+    endif
+    airline#highlighter#exec('airline_tablabel', tablabel)
+    airline#highlighter#exec('airline_tab', tab)
+    airline#highlighter#exec('airline_tabsel', tabsel)
+    airline#highlighter#exec('airline_tabtype', tabtype)
+    airline#highlighter#exec('airline_tabfill', tabfill)
+    airline#highlighter#exec('airline_tabmod', tabmod)
+    airline#highlighter#exec('airline_tabmod_unsel', tabmodu)
+    airline#highlighter#exec('airline_tabmod_unsel_right', tabmodu_right)
+    airline#highlighter#exec('airline_tabhid', tabhid)
+    # Theme for tabs on the right
+    var tablabel_r  = get(colors, 'airline_tablabel', palette.normal.airline_b)
+    var tabsel_right  = get(colors, 'airline_tabsel_right', palette.normal.airline_a)
+    var tab_right     = get(colors, 'airline_tab_right',    palette.inactive.airline_c)
+    var tabmod_right  = get(colors, 'airline_tabmod_right', palette.insert.airline_a)
+    var tabhid_right  = get(colors, 'airline_tabhid_right', palette.normal.airline_c)
+    airline#highlighter#exec('airline_tablabel_right', tablabel_r)
+    airline#highlighter#exec('airline_tab_right',    tab_right)
+    airline#highlighter#exec('airline_tabsel_right', tabsel_right)
+    airline#highlighter#exec('airline_tabmod_right', tabmod_right)
+    airline#highlighter#exec('airline_tabhid_right', tabhid_right)
+  enddef
+  def airline#extensions#tabline#get(): string # {{{2
+    var show_buffers = get(g:, 'airline#extensions#tabline#show_buffers', 1)
+    var show_tabs = get(g:, 'airline#extensions#tabline#show_tabs', 1)
+
+    var curtabcnt = tabpagenr('$')
+    if curtabcnt != s:current_tabcnt
+      s:current_tabcnt = curtabcnt
+      airline#extensions#tabline#tabs#invalidate()
+      airline#extensions#tabline#buffers#invalidate()
+      airline#extensions#tabline#ctrlspace#invalidate()
+      airline#extensions#tabline#tabws#invalidate()
+    endif
+
+    if !exists('#airline#BufAdd#*')
+      autocmd airline BufAdd * call <sid>update_tabline(0)
+    endif
+    if !exists('#airline#SessionLoadPost')
+      autocmd airline SessionLoadPost * call <sid>update_tabline(1)
+    endif
+    if s:ctrlspace
+      return airline#extensions#tabline#ctrlspace#get()
+    elseif s:tabws
+      return airline#extensions#tabline#tabws#get()
+    elseif show_buffers && curtabcnt == 1 || !show_tabs
+      return airline#extensions#tabline#buffers#get()
+    else
+      return airline#extensions#tabline#tabs#get()
+    endif
+  enddef
+  def airline#extensions#tabline#title(n: number): string # {{{2
+    var title = ''
+    if get(g:, 'airline#extensions#taboo#enabled', 1) &&
+      get(g:, 'loaded_taboo', 0) && exists("*TabooTabTitle")
+      title = call("TabooTabTitle", [n])
+    endif
+
+    if empty(title)
+      title = gettabvar(n, 'title')
+    endif
+
+    var formatter = get(g:, 'airline#extensions#tabline#tabtitle_formatter', '')
+    if empty(title) && !empty(formatter) && exists("*" .. formatter)
+      title = call(formatter, [n])
+    endif
+
+    if empty(title)
+      var buflist = tabpagebuflist(n)
+      var winnr = tabpagewinnr(n)
+      var all_buffers = airline#extensions#tabline#buflist#list()
+      var curbuf = filter(buflist, {_, v -> index(all_buffers, v) != -1})
+      if len(curbuf) ==  0
+        add(curbuf, tabpagebuflist()[0])
+      endif
+      return airline#extensions#tabline#get_buffer_name(curbuf[0], curbuf)
+    endif
+    return title
+  enddef
+  def airline#extensions#tabline#get_buffer_name(nr: number, buffers = airline#extensions#tabline#buflist#list()): string # {{{2
+    var Formatter = 'airline#extensions#tabline#formatters#' .. get(g:, 'airline#extensions#tabline#formatter', 'default') .. '#format'
+    return call(Formatter, [ nr, buffers] )
+  enddef
+  def airline#extensions#tabline#new_builder(): dict<any> # {{{2
+    var builder_context = {
+        'active': 1,
+        'tabline': 1,
+        'right_sep': get(g:, 'airline#extensions#tabline#right_sep', g:airline_right_sep),
+        'right_alt_sep': get(g:, 'airline#extensions#tabline#right_alt_sep', g:airline_right_alt_sep),
+        'left_sep': get(g:, 'airline#extensions#tabline#left_sep', g:airline_left_sep),
+        'left_alt_sep': get(g:, 'airline#extensions#tabline#left_alt_sep', g:airline_left_alt_sep),
+        }
+    return airline#extensions#tabline#builder#new(builder_context)
+  enddef
+  def airline#extensions#tabline#group_of_bufnr(tab_bufs: list<number>, bufnr: number): string # {{{2
+    var cur = bufnr('%')
+    var group = ''
+    if cur == bufnr
+      if g:airline_detect_modified && getbufvar(bufnr, '&modified')
+        group = 'airline_tabmod'
+      else
+        group = 'airline_tabsel'
+      endif
+    else
+      if g:airline_detect_modified && getbufvar(bufnr, '&modified')
+        group = 'airline_tabmod_unsel'
+      elseif index(tab_bufs, bufnr) > -1
+        group = 'airline_tab'
+      else
+        group = 'airline_tabhid'
+      endif
+    endif
+    return group
+  enddef
+  "def airline#extensions#tabline#add_label(dict: dict<any>, type: string, right: number): void # {{{2
+  "  # Seems not to work yet :(
+  "  if get(g:, 'airline#extensions#tabline#show_tab_type', 1)
+  "    dict.add_section_spaced('airline_tablabel' .. (right ? '_right' : ''),
+  "      get(g:, 'airline#extensions#tabline#' .. type .. '_label', type))
+  "  endif
+  "enddef
+  " def airline#extensions#tabline#add_tab_label(dict: dict<any>): void #  {{{2
+  "   var show_tab_count = get(g:, 'airline#extensions#tabline#show_tab_count', 1)
+  "   if show_tab_count == 2
+  "     dict.add_section_spaced('airline_tabmod', printf('%s %d/%d', "tab", tabpagenr(), tabpagenr('$')))
+  "   elseif show_tab_count == 1 && tabpagenr('$') > 1
+  "     dict.add_section_spaced('airline_tabmod', printf('%s %d/%d', "tab", tabpagenr(), tabpagenr('$')))
+  "   endif
+  " enddef
+endif

autoload/airline/extensions/tabline/autoshow.vim

@@ -1,4 +1,4 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -24,9 +24,7 @@ function! airline#extensions#tabline#autoshow#on()
   augroup airline_tabline_autoshow
     autocmd!
     if s:buf_min_count <= 0 && s:tab_min_count <= 1
-      if &lines > 3
-        set showtabline=2
-      endif
+      call airline#extensions#tabline#enable()
     else
       if s:show_buffers == 1
         autocmd BufEnter  * call <sid>show_tabline(s:buf_min_count, len(airline#extensions#tabline#buflist#list()))

autoload/airline/extensions/tabline/buffers.vim

@@ -1,11 +1,8 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
 
-let s:buffer_idx_mode = get(g:, 'airline#extensions#tabline#buffer_idx_mode', 0)
-let s:show_tab_type = get(g:, 'airline#extensions#tabline#show_tab_type', 1)
-let s:buffers_label = get(g:, 'airline#extensions#tabline#buffers_label', 'buffers')
 let s:spc = g:airline_symbols.space
 
 let s:current_bufnr = -1
@@ -36,11 +33,14 @@ function! airline#extensions#tabline#buffers#off()
 endfunction
 
 function! airline#extensions#tabline#buffers#on()
+  let terminal_event = has("nvim") ? 'TermOpen' : 'TerminalOpen'
   augroup airline_tabline_buffers
     autocmd!
-    autocmd BufDelete * call airline#extensions#tabline#buffers#invalidate()
-    autocmd User BufMRUChange call airline#extensions#tabline#buflist#invalidate()
-    autocmd User BufMRUChange call airline#extensions#tabline#buffers#invalidate()
+    autocmd BufDelete * call airline#extensions#tabline#buflist#clean()
+    if exists("##".terminal_event)
+      exe 'autocmd '. terminal_event. ' * call airline#extensions#tabline#buflist#clean()'
+    endif
+    autocmd User BufMRUChange call airline#extensions#tabline#buflist#clean()
   augroup END
 endfunction
 
@@ -49,122 +49,133 @@ function! airline#extensions#tabline#buffers#invalidate()
 endfunction
 
 function! airline#extensions#tabline#buffers#get()
-  call <sid>map_keys()
+  try
+    call <sid>map_keys()
+  catch
+    " no-op
+  endtry
   let cur = bufnr('%')
-  if cur == s:current_bufnr
+  if cur == s:current_bufnr && &columns == s:column_width
     if !g:airline_detect_modified || getbufvar(cur, '&modified') == s:current_modified
       return s:current_tabline
     endif
   endif
 
-  let l:index = 1
   let b = airline#extensions#tabline#new_builder()
   let tab_bufs = tabpagebuflist(tabpagenr())
-  for nr in s:get_visible_buffers()
-    if nr < 0
-      call b.add_raw('%#airline_tabhid#...')
-      continue
+  let show_buf_label_first = 0
+
+  if get(g:, 'airline#extensions#tabline#buf_label_first', 0)
+    let show_buf_label_first = 1
+  endif
+  if show_buf_label_first
+    call airline#extensions#tabline#add_label(b, 'buffers', 0)
+  endif
+
+  let b.tab_bufs = tabpagebuflist(tabpagenr())
+
+  let b.overflow_group = 'airline_tabhid'
+  let b.buffers = airline#extensions#tabline#buflist#list()
+  if get(g:, 'airline#extensions#tabline#current_first', 0)
+    if index(b.buffers, cur) > -1
+      call remove(b.buffers, index(b.buffers, cur))
     endif
+    let b.buffers = [cur] + b.buffers
+  endif
 
-    let group = airline#extensions#tabline#group_of_bufnr(tab_bufs, nr)
-
-    if nr == cur
+  function! b.get_group(i) dict
+    let bufnum = get(self.buffers, a:i, -1)
+    if bufnum == -1
+      return ''
+    endif
+    let group = airline#extensions#tabline#group_of_bufnr(self.tab_bufs, bufnum)
+    if bufnum == bufnr('%')
       let s:current_modified = (group == 'airline_tabmod') ? 1 : 0
     endif
+    return group
+  endfunction
 
-    " Neovim feature: Have clickable buffers
-    if has("tablineat")
-      call b.add_raw('%'.nr.'@airline#extensions#tabline#buffers#clickbuf@')
-    endif
-    if s:buffer_idx_mode
-      if len(s:number_map) > 0
-        call b.add_section(group, s:spc . get(s:number_map, l:index, '') . '%(%{airline#extensions#tabline#get_buffer_name('.nr.')}%)' . s:spc)
-      else
-        call b.add_section(group, '['.l:index.s:spc.'%(%{airline#extensions#tabline#get_buffer_name('.nr.')}%)'.']')
-      endif
-      let l:index = l:index + 1
+  if has("tablineat")
+    function! b.get_pretitle(i) dict
+      let bufnum = get(self.buffers, a:i, -1)
+      return '%'.bufnum.'@airline#extensions#tabline#buffers#clickbuf@'
+    endfunction
+
+    function! b.get_posttitle(i) dict
+      return '%X'
+    endfunction
+  endif
+
+  function! b.get_title(i) dict
+    let bufnum = get(self.buffers, a:i, -1)
+    let group = self.get_group(a:i)
+    let pgroup = self.get_group(a:i - 1)
+    " always add a space when powerline_fonts are used
+    " or for the very first item
+    if get(g:, 'airline_powerline_fonts', 0) || a:i == 0
+      let space = s:spc
     else
-      call b.add_section(group, s:spc.'%(%{airline#extensions#tabline#get_buffer_name('.nr.')}%)'.s:spc)
+      let space= (pgroup == group ? s:spc : '')
     endif
-    if has("tablineat")
-      call b.add_raw('%X')
+
+    if get(g:, 'airline#extensions#tabline#buffer_idx_mode', 0)
+      if len(s:number_map) > 0
+        return space. s:get_number(a:i) . '%(%{airline#extensions#tabline#get_buffer_name('.bufnum.')}%)' . s:spc
+      else
+        return '['.(a:i+1).s:spc.'%(%{airline#extensions#tabline#get_buffer_name('.bufnum.')}%)'.']'
+      endif
+    else
+      return space.'%(%{airline#extensions#tabline#get_buffer_name('.bufnum.')}%)'.s:spc
     endif
-  endfor
+  endfunction
+
+  let current_buffer = max([index(b.buffers, cur), 0])
+  let last_buffer = len(b.buffers) - 1
+  call b.insert_titles(current_buffer, 0, last_buffer)
 
   call b.add_section('airline_tabfill', '')
   call b.split()
   call b.add_section('airline_tabfill', '')
-  if s:show_tab_type
-    call b.add_section_spaced('airline_tabtype', s:buffers_label)
-  endif
-  if tabpagenr('$') > 1
-    call b.add_section_spaced('airline_tabmod', printf('%s %d/%d', "tab", tabpagenr(), tabpagenr('$')))
+  if !show_buf_label_first
+    call airline#extensions#tabline#add_label(b, 'buffers', 1)
   endif
 
+  call airline#extensions#tabline#add_tab_label(b)
+
   let s:current_bufnr = cur
+  let s:column_width = &columns
   let s:current_tabline = b.build()
+  let s:current_visible_buffers = copy(b.buffers)
+  " Do not remove from s:current_visible_buffers, this breaks s:select_tab()
+  "if b._right_title <= last_buffer
+  "  call remove(s:current_visible_buffers, b._right_title, last_buffer)
+  "endif
+  "if b._left_title > 0
+  "  call remove(s:current_visible_buffers, 0, b._left_title)
+  "endif
   return s:current_tabline
 endfunction
 
-function! s:get_visible_buffers()
-  let buffers = airline#extensions#tabline#buflist#list()
-  let cur = bufnr('%')
-
-  let total_width = 0
-  let max_width = 0
-
-  for nr in buffers
-    let width = len(airline#extensions#tabline#get_buffer_name(nr)) + 4
-    let total_width += width
-    let max_width = max([max_width, width])
-  endfor
-
-  " only show current and surrounding buffers if there are too many buffers
-  let position  = index(buffers, cur)
-  let vimwidth = &columns
-  if total_width > vimwidth && position > -1
-    let buf_count = len(buffers)
-
-    " determine how many buffers to show based on the longest buffer width,
-    " use one on the right side and put the rest on the left
-    let buf_max   = vimwidth / max_width
-    let buf_right = 1
-    let buf_left  = max([0, buf_max - buf_right])
-
-    let start = max([0, position - buf_left])
-    let end   = min([buf_count, position + buf_right])
-
-    " fill up available space on the right
-    if position < buf_left
-      let end += (buf_left - position)
-    endif
-
-    " fill up available space on the left
-    if end > buf_count - 1 - buf_right
-      let start -= max([0, buf_right - (buf_count - 1 - position)])
-    endif
-
-    let buffers = eval('buffers[' . start . ':' . end . ']')
-
-    if start > 0
-      call insert(buffers, -1, 0)
-    endif
-
-    if end < buf_count - 1
-      call add(buffers, -1)
-    endif
+function! s:get_number(index)
+  if len(s:number_map) == 0
+    return a:index
+  endif
+  let bidx_mode = get(g:, 'airline#extensions#tabline#buffer_idx_mode', 0)
+  if bidx_mode > 1
+    let l:count = bidx_mode == 2 ? a:index+11 : a:index+1
+    return join(map(split(printf('%02d', l:count), '\zs'),
+          \ 'get(s:number_map, v:val, "")'), '')
+  else
+    return get(s:number_map, a:index+1, '')
   endif
-
-  let s:current_visible_buffers = buffers
-  return buffers
 endfunction
 
 function! s:select_tab(buf_index)
-  " no-op when called in the NERDTree buffer
-  if exists('t:NERDTreeBufName') && bufname('%') == t:NERDTreeBufName
+  " no-op when called in 'keymap_ignored_filetypes'
+  if count(get(g:, 'airline#extensions#tabline#keymap_ignored_filetypes',
+        \ ['vimfiler', 'nerdtree']), &ft)
     return
   endif
-
   let idx = a:buf_index
   if s:current_visible_buffers[0] == -1
     let idx = idx + 1
@@ -172,31 +183,35 @@ function! s:select_tab(buf_index)
 
   let buf = get(s:current_visible_buffers, idx, 0)
   if buf != 0
-    exec 'b!' . buf
-  endif
+     exec 'b!' . buf
+   endif
 endfunction
 
 function! s:jump_to_tab(offset)
-    let l = s:current_visible_buffers
+    let l = airline#extensions#tabline#buflist#list()
     let i = index(l, bufnr('%'))
     if i > -1
-        exec 'b!' . l[float2nr(fmod(i + a:offset, len(l)))]
+        exec 'b!' . l[(i + a:offset) % len(l)]
     endif
 endfunction
 
 function! s:map_keys()
-  if s:buffer_idx_mode
-    noremap <silent> <Plug>AirlineSelectTab1 :call <SID>select_tab(0)<CR>
-    noremap <silent> <Plug>AirlineSelectTab2 :call <SID>select_tab(1)<CR>
-    noremap <silent> <Plug>AirlineSelectTab3 :call <SID>select_tab(2)<CR>
-    noremap <silent> <Plug>AirlineSelectTab4 :call <SID>select_tab(3)<CR>
-    noremap <silent> <Plug>AirlineSelectTab5 :call <SID>select_tab(4)<CR>
-    noremap <silent> <Plug>AirlineSelectTab6 :call <SID>select_tab(5)<CR>
-    noremap <silent> <Plug>AirlineSelectTab7 :call <SID>select_tab(6)<CR>
-    noremap <silent> <Plug>AirlineSelectTab8 :call <SID>select_tab(7)<CR>
-    noremap <silent> <Plug>AirlineSelectTab9 :call <SID>select_tab(8)<CR>
+  let bidx_mode = get(g:, 'airline#extensions#tabline#buffer_idx_mode', 1)
+  if bidx_mode > 0
+    if bidx_mode == 1
+      for i in range(1, 9)
+        exe printf('noremap <silent> <Plug>AirlineSelectTab%d :call <SID>select_tab(%d)<CR>', i, i-1)
+      endfor
+    else
+      let start_idx = bidx_mode == 2 ? 11 : 1
+      for i in range(start_idx, 99)
+        exe printf('noremap <silent> <Plug>AirlineSelectTab%02d :call <SID>select_tab(%d)<CR>', i, i-start_idx)
+      endfor
+    endif
     noremap <silent> <Plug>AirlineSelectPrevTab :<C-u>call <SID>jump_to_tab(-v:count1)<CR>
     noremap <silent> <Plug>AirlineSelectNextTab :<C-u>call <SID>jump_to_tab(v:count1)<CR>
+    " Enable this for debugging
+    " com! AirlineBufferList :echo map(copy(s:current_visible_buffers), {i,k -> k.": ".bufname(k)})
   endif
 endfunction
 
@@ -212,7 +227,7 @@ function! airline#extensions#tabline#buffers#clickbuf(minwid, clicks, button, mo
       elseif a:button is# 'm'
         " middle button - delete buffer
 
-        if get(g:, 'airline#extensions#tabline#middle_click_preserves_windows', 0) == 0
+        if get(g:, 'airline#extensions#tabline#middle_click_preserves_windows', 0) == 0 || winnr('$') == 1
           " just simply delete the clicked buffer. This will cause windows
           " associated with the clicked buffer to be closed.
           silent execute 'bdelete' a:minwid

autoload/airline/extensions/tabline/buflist.vim

@@ -1,4 +1,4 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -7,12 +7,38 @@ function! airline#extensions#tabline#buflist#invalidate()
   unlet! s:current_buffer_list
 endfunction
 
+function! airline#extensions#tabline#buflist#clean()
+  call airline#extensions#tabline#buflist#invalidate()
+  call airline#extensions#tabline#buffers#invalidate()
+endfunction
+
+" paths in excludes list
+function! s:ExcludePaths(nr, exclude_paths)
+  let bname = bufname(a:nr)
+  if empty(bname)
+    return 0
+  endif
+  let bpath = fnamemodify(bname, ":p")
+  for f in a:exclude_paths
+    if bpath =~# f | return 1 | endif
+  endfor
+endfunction
+
+" other types to exclude
+function! s:ExcludeOther(nr, exclude_preview)
+  if (getbufvar(a:nr, 'current_syntax') == 'qf') ||
+        \  (a:exclude_preview && getbufvar(a:nr, '&bufhidden') == 'wipe'
+        \  && getbufvar(a:nr, '&buftype') == 'nofile')
+    return 1 | endif
+endfunction
+
 function! airline#extensions#tabline#buflist#list()
   if exists('s:current_buffer_list')
     return s:current_buffer_list
   endif
 
-  let excludes = get(g:, 'airline#extensions#tabline#excludes', [])
+  let exclude_buffers = get(g:, 'airline#extensions#tabline#exclude_buffers', [])
+  let exclude_paths = get(g:, 'airline#extensions#tabline#excludes', [])
   let exclude_preview = get(g:, 'airline#extensions#tabline#exclude_preview', 1)
 
   let list = (exists('g:did_bufmru') && g:did_bufmru) ? BufMRUList() : range(1, bufnr("$"))
@@ -24,16 +50,28 @@ function! airline#extensions#tabline#buflist#list()
   for nr in list
     if buflisted(nr)
       " Do not add to the bufferlist, if either
-      " 1) buffername matches exclude pattern
-      " 2) buffer is a quickfix buffer
-      " 3) exclude preview windows (if 'bufhidden' == wipe
-      "    and 'buftype' == nofile
-      if (!empty(excludes) && match(bufname(nr), join(excludes, '\|')) > -1) ||
-            \ (getbufvar(nr, 'current_syntax') == 'qf') ||
-            \  (exclude_preview && getbufvar(nr, '&bufhidden') == 'wipe'
-            \  && getbufvar(nr, '&buftype') == 'nofile')
+      " 1) bufnr is exclude_buffers list
+      " 2) buffername matches one of exclude_paths patterns
+      " 3) buffer is a quickfix buffer
+      " 4) when excluding preview windows:
+      "     'bufhidden' == wipe
+      "     'buftype' == nofile
+      " 5) ignore buffers matching airline#extensions#tabline#ignore_bufadd_pat
+
+      " check buffer numbers first
+      if index(exclude_buffers, nr) >= 0
+        continue
+      " check paths second
+      elseif !empty(exclude_paths) && s:ExcludePaths(nr, exclude_paths)
+        continue
+      " ignore buffers matching airline#extensions#tabline#ignore_bufadd_pat
+      elseif airline#util#ignore_buf(bufname(nr))
+        continue
+      " check other types last
+      elseif s:ExcludeOther(nr, exclude_preview)
         continue
       endif
+
       call add(buffers, nr)
     endif
   endfor
@@ -41,4 +79,3 @@ function! airline#extensions#tabline#buflist#list()
   let s:current_buffer_list = buffers
   return buffers
 endfunction
-

autoload/airline/extensions/tabline/builder.vim

@@ -0,0 +1,232 @@
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+let s:prototype = {}
+
+" Set the point in the tabline where the builder should insert the titles.
+"
+" Subsequent calls will overwrite the previous ones, so only the last call
+" determines to location to insert titles.
+"
+" NOTE: The titles are not inserted until |build| is called, so that the
+" remaining contents of the tabline can be taken into account.
+"
+" Callers should define at least |get_title| and |get_group| on the host
+" object before calling |build|.
+function! s:prototype.insert_titles(current, first, last) dict
+  let self._first_title = a:first " lowest index
+  let self._last_title = a:last " highest index
+  let self._left_title = a:current " next index to add on the left
+  let self._right_title = a:current + 1 " next index to add on the right
+  let self._left_position = self.get_position() " left end of titles
+  let self._right_position = self._left_position " right end of the titles
+endfunction
+
+" Insert a title for entry number |index|, of group |group| at position |pos|,
+" if there is space for it. Returns 1 if it is inserted, 0 otherwise
+"
+" |force| inserts the title even if there isn't enough space left for it.
+" |sep_size| adjusts the size change that the title is considered to take up,
+"            to account for changes to the separators
+"
+" The title is defined by |get_title| on the hosting object, called with
+" |index| as its only argument.
+" |get_pretitle| and |get_posttitle| may be defined on the host object to
+" insert some formatting before or after the title. These should be 0-width.
+"
+" This method updates |_right_position| and |_remaining_space| on the host
+" object, if the title is inserted.
+function! s:prototype.try_insert_title(index, group, pos, sep_size, force) dict
+  let title = self.get_title(a:index)
+  let title_size = s:tabline_evaluated_length(title) + a:sep_size
+  if a:force || self._remaining_space >= title_size
+    let pos = a:pos
+    if has_key(self, "get_pretitle")
+      call self.insert_raw(self.get_pretitle(a:index), pos)
+      let self._right_position += 1
+      let pos += 1
+    endif
+
+    call self.insert_section(a:group, title, pos)
+    let self._right_position += 1
+    let pos += 1
+
+    if has_key(self, "get_posttitle")
+      call self.insert_raw(self.get_posttitle(a:index), pos)
+      let self._right_position += 1
+      let pos += 1
+    endif
+
+    let self._remaining_space -= title_size
+    return 1
+  endif
+  return 0
+endfunction
+
+function! s:get_separator_change(new_group, old_group, end_group, sep_size, alt_sep_size)
+  return s:get_separator_change_with_end(a:new_group, a:old_group, a:end_group, a:end_group, a:sep_size, a:alt_sep_size)
+endfunction
+
+" Compute the change in size of the tabline caused by separators
+"
+" This should be kept up-to-date with |s:get_transitioned_seperator| and
+" |s:get_separator| in autoload/airline/builder.vim
+function! s:get_separator_change_with_end(new_group, old_group, new_end_group, old_end_group, sep_size, alt_sep_size)
+  let sep_change = 0
+  if !empty(a:new_end_group) " Separator between title and the end
+    let sep_change += airline#builder#should_change_group(a:new_group, a:new_end_group) ? a:sep_size : a:alt_sep_size
+  endif
+  if !empty(a:old_group) " Separator between the title and the one adjacent
+    let sep_change += airline#builder#should_change_group(a:new_group, a:old_group) ? a:sep_size : a:alt_sep_size
+    if !empty(a:old_end_group) " Remove mis-predicted separator
+      let sep_change -= airline#builder#should_change_group(a:old_group, a:old_end_group) ? a:sep_size : a:alt_sep_size
+    endif
+  endif
+  return sep_change
+endfunction
+
+" This replaces the build function of the |airline#builder#new| object, to
+" insert titles as specified by the last call to |insert_titles| before
+" passing to the original build function.
+"
+" Callers should define at least |get_title| and |get_group| on the host
+" object if |insert_titles| has been called on it.
+function! s:prototype.build() dict
+  if has_key(self, '_left_position') && self._first_title <= self._last_title
+    let self._remaining_space = &columns - s:tabline_evaluated_length(self._build())
+
+    let center_active = get(g:, 'airline#extensions#tabline#center_active', 0)
+
+    let sep_size = s:tabline_evaluated_length(self._context.left_sep)
+    let alt_sep_size = s:tabline_evaluated_length(self._context.left_alt_sep)
+
+    let outer_left_group = airline#builder#get_prev_group(self._sections, self._left_position)
+    let outer_right_group = airline#builder#get_next_group(self._sections, self._right_position)
+
+    let overflow_marker = get(g:, 'airline#extensions#tabline#overflow_marker', g:airline_symbols.ellipsis)
+    let overflow_marker_size = s:tabline_evaluated_length(overflow_marker)
+    " Allow space for the markers before we begin filling in titles.
+    if self._left_title > self._first_title
+      let self._remaining_space -= overflow_marker_size +
+        \ s:get_separator_change(self.overflow_group, "", outer_left_group, sep_size, alt_sep_size)
+    endif
+    if self._left_title < self._last_title
+      let self._remaining_space -= overflow_marker_size +
+        \ s:get_separator_change(self.overflow_group, "", outer_right_group, sep_size, alt_sep_size)
+    endif
+
+    " Add the current title
+    let group = self.get_group(self._left_title)
+    if self._left_title == self._first_title
+      let sep_change = s:get_separator_change(group, "", outer_left_group, sep_size, alt_sep_size)
+    else
+      let sep_change = s:get_separator_change(group, "", self.overflow_group, sep_size, alt_sep_size)
+    endif
+    if self._left_title == self._last_title
+      let sep_change += s:get_separator_change(group, "", outer_right_group, sep_size, alt_sep_size)
+    else
+      let sep_change += s:get_separator_change(group, "", self.overflow_group, sep_size, alt_sep_size)
+    endif
+    let left_group = group
+    let right_group = group
+    let self._left_title -=
+      \ self.try_insert_title(self._left_title, group, self._left_position, sep_change, 1)
+
+    if get(g:, 'airline#extensions#tabline#current_first', 0)
+      " always have current title first
+      let self._left_position += 1
+    endif
+
+    if !center_active && self._right_title <= self._last_title
+      " Add the title to the right
+      let group = self.get_group(self._right_title)
+      if self._right_title == self._last_title
+        let sep_change = s:get_separator_change_with_end(group, right_group, outer_right_group, self.overflow_group, sep_size, alt_sep_size) - overflow_marker_size
+      else
+        let sep_change = s:get_separator_change(group, right_group, self.overflow_group, sep_size, alt_sep_size)
+      endif
+      let right_group = group
+      let self._right_title +=
+      \ self.try_insert_title(self._right_title, group, self._right_position, sep_change, 1)
+    endif
+
+    while self._remaining_space > 0
+      let done = 0
+      if self._left_title >= self._first_title
+        " Insert next title to the left
+        let group = self.get_group(self._left_title)
+        if self._left_title == self._first_title
+          let sep_change = s:get_separator_change_with_end(group, left_group, outer_left_group, self.overflow_group, sep_size, alt_sep_size) - overflow_marker_size
+        else
+          let sep_change = s:get_separator_change(group, left_group, self.overflow_group, sep_size, alt_sep_size)
+        endif
+        let left_group = group
+        let done = self.try_insert_title(self._left_title, group, self._left_position, sep_change, 0)
+        let self._left_title -= done
+      endif
+      " If center_active is set, this |if| operates as an independent |if|,
+      " otherwise as an |elif|.
+      if self._right_title <= self._last_title && (center_active || !done)
+        " Insert next title to the right
+        let group = self.get_group(self._right_title)
+        if self._right_title == self._last_title
+          let sep_change = s:get_separator_change_with_end(group, right_group, outer_right_group, self.overflow_group, sep_size, alt_sep_size) - overflow_marker_size
+        else
+          let sep_change = s:get_separator_change(group, right_group, self.overflow_group, sep_size, alt_sep_size)
+        endif
+        let right_group = group
+        let done = self.try_insert_title(self._right_title, group, self._right_position, sep_change, 0)
+        let self._right_title += done
+      endif
+      if !done
+        break
+      endif
+    endwhile
+
+    if self._left_title >= self._first_title
+      if get(g:, 'airline#extensions#tabline#current_first', 0)
+        let self._left_position -= 1
+      endif
+      call self.insert_section(self.overflow_group, overflow_marker, self._left_position)
+      let self._right_position += 1
+    endif
+
+    if self._right_title <= self._last_title
+      call self.insert_section(self.overflow_group, overflow_marker, self._right_position)
+    endif
+  endif
+
+  return self._build()
+endfunction
+
+let s:prototype.overflow_group = 'airline_tab'
+
+" Extract the text content a tabline will render. (Incomplete).
+"
+" See :help 'statusline' for the list of fields.
+function! s:evaluate_tabline(tabline)
+  let tabline = a:tabline
+  let tabline = substitute(tabline, '%{\([^}]\+\)}', '\=eval(submatch(1))', 'g')
+  let tabline = substitute(tabline, '%#[^#]\+#', '', 'g')
+  let tabline = substitute(tabline, '%(\([^)]\+\)%)', '\1', 'g')
+  let tabline = substitute(tabline, '%\d\+[TX]', '', 'g')
+  let tabline = substitute(tabline, '%=', '', 'g')
+  let tabline = substitute(tabline, '%\d*\*', '', 'g')
+  if has('tablineat')
+    let tabline = substitute(tabline, '%@[^@]\+@', '', 'g')
+  endif
+  return tabline
+endfunction
+
+function! s:tabline_evaluated_length(tabline)
+  return airline#util#strchars(s:evaluate_tabline(a:tabline))
+endfunction
+
+function! airline#extensions#tabline#builder#new(context)
+  let builder = airline#builder#new(a:context)
+  let builder._build = builder.build
+  call extend(builder, s:prototype, 'force')
+  return builder
+endfunction

autoload/airline/extensions/tabline/ctrlspace.vim

@@ -1,17 +1,14 @@
-" MIT License. Copyright (c) 2016 Kevin Sapper
+" MIT License. Copyright (c) 2016-2020 Kevin Sapper et al.
+" Plugin: https://github.com/szw/vim-ctrlspace
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
 
 let s:current_bufnr = -1
+let s:current_modified = 0
 let s:current_tabnr = -1
 let s:current_tabline = ''
-
-let s:buffers_label = get(g:, 'airline#extensions#tabline#buffers_label', 'buffers')
-let s:tabs_label = get(g:, 'airline#extensions#tabline#tabs_label', 'tabs')
-let s:switch_buffers_and_tabs = get(g:, 'airline#extensions#tabline#switch_buffers_and_tabs', 0)
-let s:show_buffers = get(g:, 'airline#extensions#tabline#show_buffers', 1)
-let s:show_tabs = get(g:, 'airline#extensions#tabline#show_tabs', 1)
+let s:highlight_groups = ['hid', 0, '', 'sel', 'mod_unsel', 0, 'mod_unsel', 'mod']
 
 function! airline#extensions#tabline#ctrlspace#off()
   augroup airline_tabline_ctrlspace
@@ -31,118 +28,137 @@ function! airline#extensions#tabline#ctrlspace#invalidate()
   let s:current_tabnr = -1
 endfunction
 
-function! airline#extensions#tabline#ctrlspace#add_buffer_section(builder, cur_tab, cur_buf, pos)
-  if a:pos == 0
-    let pos_extension = ''
-  else
-    let pos_extension = '_right'
-  endif
-
-  let s:buffer_list = ctrlspace#api#BufferList(a:cur_tab)
-  for buffer in s:buffer_list
-      if a:cur_buf == buffer.index
-        if buffer.modified
-          let group = 'airline_tabmod'.pos_extension
-        else
-          let group = 'airline_tabsel'.pos_extension
-        endif
-      else
-        if buffer.modified
-          let group = 'airline_tabmod_unsel'.pos_extension
-        elseif buffer.visible
-          let group = 'airline_tab'.pos_extension
-        else
-          let group = 'airline_tabhid'.pos_extension
-        endif
+function! airline#extensions#tabline#ctrlspace#add_buffer_section(builder, cur_tab, cur_buf, pull_right)
+  let pos_extension = (a:pull_right ? '_right' : '')
+  
+  let buffer_list = []
+  for bufferindex in sort(keys(ctrlspace#api#Buffers(a:cur_tab)), 'N')
+    for buffer in ctrlspace#api#BufferList(a:cur_tab)
+      if buffer['index'] == bufferindex
+        call add(buffer_list, buffer)
       endif
-
-      let buf_name = '%(%{airline#extensions#tabline#get_buffer_name('.buffer.index.')}%)'
-
-      if has("tablineat")
-        let buf_name = '%'.buffer.index.'@airline#extensions#tabline#buffers#clickbuf@'.buf_name.'%X'
-      endif
-
-      call a:builder.add_section_spaced(group, buf_name)
+    endfor
   endfor
-endfunction
 
-function! airline#extensions#tabline#ctrlspace#add_tab_section(builder, pos)
-  if a:pos == 0
-    let pos_extension = ''
-  else
-    let pos_extension = '_right'
+  " add by tenfy(tenfyzhong@qq.com)
+  " if the current buffer no in the buffer list
+  " return false and no redraw tabline.
+  " Fixes #1515. if there a BufEnter autocmd execute redraw. The tabline may no update.
+  let bufnr_list = map(copy(buffer_list), 'v:val["index"]')
+  if index(bufnr_list, a:cur_buf) == -1 && a:cur_tab == s:current_tabnr
+    return 0
   endif
 
-  for tab in s:tab_list
-    if tab.current
-      if tab.modified
-        let group = 'airline_tabmod'.pos_extension
-      else
-        let group = 'airline_tabsel'.pos_extension
-      endif
-    else
-      if tab.modified
-        let group = 'airline_tabmod_unsel'.pos_extension
-      else
-        let group = 'airline_tabhid'.pos_extension
-      endif
+  let s:current_modified = getbufvar(a:cur_buf, '&modified')
+
+  for buffer in buffer_list
+    let group = 'airline_tab'
+          \ .s:highlight_groups[(4 * buffer.modified) + (2 * buffer.visible) + (a:cur_buf == buffer.index)]
+          \ .pos_extension
+
+    let buf_name = '%(%{airline#extensions#tabline#get_buffer_name('.buffer.index.')}%)'
+
+    if has("tablineat")
+      let buf_name = '%'.buffer.index.'@airline#extensions#tabline#buffers#clickbuf@'.buf_name.'%X'
     endif
 
-    call a:builder.add_section_spaced(group, '%'.tab.index.'T'.tab.title.ctrlspace#api#TabBuffersNumber(tab.index).'%T')
+    call a:builder.add_section_spaced(group, buf_name)
+  endfor
+
+  " add by tenfy(tenfyzhong@qq.com)
+  " if the selected buffer was updated
+  " return true
+  return 1
+endfunction
+
+function! airline#extensions#tabline#ctrlspace#add_tab_section(builder, pull_right)
+  let pos_extension = (a:pull_right ? '_right' : '')
+  let tab_list = ctrlspace#api#TabList()
+
+  for tab in tab_list
+    let group = 'airline_tab'
+          \ .s:highlight_groups[(4 * tab.modified) + (3 * tab.current)]
+          \ .pos_extension
+
+    if get(g:, 'airline#extensions#tabline#ctrlspace_show_tab_nr', 0) == 0
+      call a:builder.add_section_spaced(group, '%'.tab.index.'T'.tab.title.ctrlspace#api#TabBuffersNumber(tab.index).'%T')
+    else
+      call a:builder.add_section_spaced(group, '%'.(tab.index).'T'.(tab.index).(g:airline_symbols.space).(tab.title).ctrlspace#api#TabBuffersNumber(tab.index).'%T')
+    endif
   endfor
 endfunction
 
 function! airline#extensions#tabline#ctrlspace#get()
   let cur_buf = bufnr('%')
+  let buffer_label = get(g:, 'airline#extensions#tabline#buffers_label', 'buffers')
+  let tab_label = get(g:, 'airline#extensions#tabline#tabs_label', 'tabs')
+  let switch_buffers_and_tabs = get(g:, 'airline#extensions#tabline#switch_buffers_and_tabs', 0)
 
-  call airline#extensions#tabline#tabs#map_keys()
-  let s:tab_list = ctrlspace#api#TabList()
-  for tab in s:tab_list
-    if tab.current
-      let cur_tab = tab.index
-    endif
-  endfor
+  try
+    call airline#extensions#tabline#tabs#map_keys()
+  endtry
+
+  let cur_tab = tabpagenr()
 
   if cur_buf == s:current_bufnr && cur_tab == s:current_tabnr
-    return s:current_tabline
+    if !g:airline_detect_modified || getbufvar(cur_buf, '&modified') == s:current_modified
+      return s:current_tabline
+    endif
   endif
 
   let builder = airline#extensions#tabline#new_builder()
 
+  let show_buffers = get(g:, 'airline#extensions#tabline#show_buffers', 1)
+  let show_tabs = get(g:, 'airline#extensions#tabline#show_tabs', 1)
+
+  let AppendBuffers = function('airline#extensions#tabline#ctrlspace#add_buffer_section', [builder, cur_tab, cur_buf])
+  let AppendTabs = function('airline#extensions#tabline#ctrlspace#add_tab_section', [builder])
+  let AppendLabel = function(builder.add_section_spaced, ['airline_tabtype'], builder)
+
+  " <= 1: |{Tabs}                      <tab|
+  " == 2: |{Buffers}               <buffers|
+  " == 3: |buffers> {Buffers}  {Tabs} <tabs|
+  let showing_mode = (2 * show_buffers) + (show_tabs)
+  let ignore_update = 0
+
   " Add left tabline content
-  if s:show_buffers == 0
-      call airline#extensions#tabline#ctrlspace#add_tab_section(builder, 0)
-  elseif s:show_tabs == 0
-      call airline#extensions#tabline#ctrlspace#add_buffer_section(builder, cur_tab, cur_buf, 0)
+  if showing_mode <= 1 " Tabs only mode
+    call AppendTabs(0)
+  elseif showing_mode == 2 " Buffers only mode
+    let ignore_update = !AppendBuffers(0)
   else
-    if s:switch_buffers_and_tabs == 0
-      call builder.add_section_spaced('airline_tabtype', s:buffers_label)
-      call airline#extensions#tabline#ctrlspace#add_buffer_section(builder, cur_tab, cur_buf, 0)
+    if !switch_buffers_and_tabs
+      call AppendLabel(buffer_label)
+      let ignore_update = !AppendBuffers(0)
     else
-      call builder.add_section_spaced('airline_tabtype', s:tabs_label)
-      call airline#extensions#tabline#ctrlspace#add_tab_section(builder, 0)
+      call AppendLabel(tab_label)
+      call AppendTabs(0)
     endif
   endif
 
+  if ignore_update | return s:current_tabline | endif
+
   call builder.add_section('airline_tabfill', '')
   call builder.split()
   call builder.add_section('airline_tabfill', '')
 
   " Add right tabline content
-  if s:show_buffers == 0
-      call builder.add_section_spaced('airline_tabtype', s:tabs_label)
-  elseif s:show_tabs == 0
-      call builder.add_section_spaced('airline_tabtype', s:buffers_label)
+  if showing_mode <= 1 " Tabs only mode
+    call AppendLabel(tab_label)
+  elseif showing_mode == 2 " Buffers only mode
+    call AppendLabel(buffer_label)
   else
-    if s:switch_buffers_and_tabs == 0
-      call airline#extensions#tabline#ctrlspace#add_tab_section(builder, 1)
-      call builder.add_section_spaced('airline_tabtype', s:tabs_label)
+    if !switch_buffers_and_tabs
+      call AppendTabs(1)
+      call AppendLabel(tab_label)
     else
-      call airline#extensions#tabline#ctrlspace#add_buffer_section(builder, cur_tab, cur_buf, 1)
-      call builder.add_section_spaced('airline_tabtype', s:buffers_label)
+      let ignore_update = AppendBuffers(1)
+      call AppendLabel(buffer_label)
     endif
   endif
 
+  if ignore_update | return s:current_tabline | endif
+
   let s:current_bufnr = cur_buf
   let s:current_tabnr = cur_tab
   let s:current_tabline = builder.build()

autoload/airline/extensions/tabline/formatters/default.vim

@@ -1,41 +1,82 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
-" vim: et ts=2 sts=2 sw=2
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" vim: et ts=2 sts=2 sw=2 et fdm=marker
 
 scriptencoding utf-8
 
-let s:fnamecollapse = get(g:, 'airline#extensions#tabline#fnamecollapse', 1)
-let s:fnametruncate = get(g:, 'airline#extensions#tabline#fnametruncate', 0)
-let s:buf_nr_format = get(g:, 'airline#extensions#tabline#buffer_nr_format', '%s: ')
-let s:buf_nr_show = get(g:, 'airline#extensions#tabline#buffer_nr_show', 0)
-let s:buf_modified_symbol = g:airline_symbols.modified
+if !exists(":def") || (exists(":def") && get(g:, "airline_experimental", 0)==0)
+  " Legacy VimScript implementation {{{1
+  function! airline#extensions#tabline#formatters#default#format(bufnr, buffers)  " {{{2
+    let fnametruncate = get(g:, 'airline#extensions#tabline#fnametruncate', 0)
+    let fmod = get(g:, 'airline#extensions#tabline#fnamemod', ':~:.')
+    let _ = ''
 
-function! airline#extensions#tabline#formatters#default#format(bufnr, buffers)
-  let fmod = get(g:, 'airline#extensions#tabline#fnamemod', ':~:.')
-  let _ = ''
-
-  let name = bufname(a:bufnr)
-  if empty(name)
-    let _ .= '[No Name]'
-  else
-    if s:fnamecollapse
-      let _ .= substitute(fnamemodify(name, fmod), '\v\w\zs.{-}\ze(\\|/)', '', 'g')
+    let name = bufname(a:bufnr)
+    if empty(name)
+      let _ .= '[No Name]'
+    elseif name =~ 'term://'
+      " Neovim Terminal
+      let _ = substitute(name, '\(term:\)//.*:\(.*\)', '\1 \2', '')
     else
-      let _ .= fnamemodify(name, fmod)
+      if get(g:, 'airline#extensions#tabline#fnamecollapse', 1)
+        " Does not handle non-ascii characters like Cyrillic: 'D/Учёба/t.c'
+        "let _ .= substitute(fnamemodify(name, fmod), '\v\w\zs.{-}\ze(\\|/)', '', 'g')
+        let _ .= pathshorten(fnamemodify(name, fmod))
+      else
+        let _ .= fnamemodify(name, fmod)
+      endif
+      if a:bufnr != bufnr('%') && fnametruncate && strlen(_) > fnametruncate
+        let _ = airline#util#strcharpart(_, 0, fnametruncate)
+      endif
     endif
-    if a:bufnr != bufnr('%') && s:fnametruncate && strlen(_) > s:fnametruncate
-      let _ = strpart(_, 0, s:fnametruncate)
+
+    return airline#extensions#tabline#formatters#default#wrap_name(a:bufnr, _)
+  endfunction
+
+  function! airline#extensions#tabline#formatters#default#wrap_name(bufnr, buffer_name) " {{{2
+    let buf_nr_format = get(g:, 'airline#extensions#tabline#buffer_nr_format', '%s: ')
+    let buf_nr_show = get(g:, 'airline#extensions#tabline#buffer_nr_show', 0)
+
+    let _ = buf_nr_show ? printf(buf_nr_format, a:bufnr) : ''
+    let _ .= substitute(a:buffer_name, '\\', '/', 'g')
+
+    if getbufvar(a:bufnr, '&modified') == 1
+      let _ .= g:airline_symbols.modified
     endif
-  endif
+    return _
+  endfunction
+else
+  " New Vim9 script implementation {{{1
+  def airline#extensions#tabline#formatters#default#format(bufnr: number, buffers: list<number>): string # {{{2
+    var fmod = get(g:, 'airline#extensions#tabline#fnamemod', ':~:.')
+    var result = ''
+		var fnametruncate = get(g:, 'airline#extensions#tabline#fnametruncate', 0)
 
-  return airline#extensions#tabline#formatters#default#wrap_name(a:bufnr, _)
-endfunction
-
-function! airline#extensions#tabline#formatters#default#wrap_name(bufnr, buffer_name)
-  let _ = s:buf_nr_show ? printf(s:buf_nr_format, a:bufnr) : ''
-  let _ .= substitute(a:buffer_name, '\\', '/', 'g')
-
-  if getbufvar(a:bufnr, '&modified') == 1
-    let _ .= s:buf_modified_symbol
-  endif
-  return _
-endfunction
+    var name = bufname(bufnr)
+    if empty(name)
+      result =  '[No Name]'
+    elseif name =~ 'term://'
+      # Neovim Terminal
+      result = substitute(name, '\(term:\)//.*:\(.*\)', '\1 \2', '')
+    else
+      if get(g:, 'airline#extensions#tabline#fnamecollapse', 1)
+         result = pathshorten(fnamemodify(name, fmod))
+      else
+         result = fnamemodify(name, fmod)
+      endif
+      if bufnr != bufnr('%') && fnametruncate && strlen(result) > fnametruncate
+        result = airline#util#strcharpart(result, 0, fnametruncate)
+      endif
+    endif
+    return airline#extensions#tabline#formatters#default#wrap_name(bufnr, result)
+  enddef
+  def airline#extensions#tabline#formatters#default#wrap_name(bufnr: number, buffer_name: string): string # {{{2
+    var buf_nr_show = get(g:, 'airline#extensions#tabline#buffer_nr_show', 0)
+    var buf_nr_format = get(g:, 'airline#extensions#tabline#buffer_nr_format', '%s: ')
+    var result = buf_nr_show ? printf(buf_nr_format, bufnr) : ''
+    result = result .. substitute(buffer_name, '\\', '/', 'g')
+    if getbufvar(bufnr, '&modified') == 1
+      result = result .. g:airline_symbols.modified
+    endif
+    return result
+  enddef
+endif

autoload/airline/extensions/tabline/formatters/jsformatter.vim

@@ -0,0 +1,15 @@
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+function! airline#extensions#tabline#formatters#jsformatter#format(bufnr, buffers)
+  let buf = bufname(a:bufnr)
+  let filename = fnamemodify(buf, ':t')
+
+  if filename == 'index.js' || filename == 'index.jsx' || filename == 'index.ts' || filename == 'index.tsx'
+    return fnamemodify(buf, ':p:h:t') . '/i'
+  else
+    return airline#extensions#tabline#formatters#unique_tail_improved#format(a:bufnr, a:buffers)
+  endif
+endfunction

autoload/airline/extensions/tabline/formatters/short_path.vim

@@ -0,0 +1,22 @@
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+let s:fnamecollapse = get(g:, 'airline#extensions#tabline#fnamecollapse', 1)
+
+function! airline#extensions#tabline#formatters#short_path#format(bufnr, buffers)
+  let _ = ''
+
+  let name = bufname(a:bufnr)
+  if empty(name)
+    let _ .= '[No Name]'
+  elseif name =~ 'term://'
+    " Neovim Terminal
+    let _ = substitute(name, '\(term:\)//.*:\(.*\)', '\1 \2', '')
+  else
+    let _ .= fnamemodify(name, ':p:h:t') . '/' . fnamemodify(name, ':t')
+  endif
+
+  return airline#extensions#tabline#formatters#default#wrap_name(a:bufnr, _)
+endfunction

autoload/airline/extensions/tabline/formatters/tabnr.vim

@@ -0,0 +1,15 @@
+" MIT License. Copyright (c) 2017-2020 Christian Brabandt et al.
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+function! airline#extensions#tabline#formatters#tabnr#format(tab_nr_type, nr)
+  let spc=g:airline_symbols.space
+  if a:tab_nr_type == 0 " nr of splits
+    return spc. '%{len(tabpagebuflist('.a:nr.'))}'
+  elseif a:tab_nr_type == 1 " tab number
+    return spc. a:nr
+  else "== 2 splits and tab number
+    return spc. a:nr. '.%{len(tabpagebuflist('.a:nr.'))}'
+  endif
+endfunction

autoload/airline/extensions/tabline/formatters/unique_tail.vim

@@ -1,4 +1,4 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -10,9 +10,14 @@ function! airline#extensions#tabline#formatters#unique_tail#format(bufnr, buffer
   for nr in a:buffers
     let name = bufname(nr)
     if empty(name)
-      let map[nr] = '[No Name]'
+      let map[nr] = airline#extensions#tabline#formatters#default#wrap_name(nr, '[No Name]')
     else
-      let tail = fnamemodify(name, ':s?/\+$??:t')
+      if name =~ 'term://'
+        " Neovim Terminal
+        let tail = substitute(name, '\(term:\)//.*:\(.*\)', '\1 \2', '')
+      else
+        let tail = fnamemodify(name, ':s?/\+$??:t')
+      endif
       if has_key(tails, tail)
         let duplicates[nr] = nr
       endif
@@ -21,8 +26,15 @@ function! airline#extensions#tabline#formatters#unique_tail#format(bufnr, buffer
     endif
   endfor
 
+  let fmod = get(g:, 'airline#extensions#tabline#fnamemod', ':p:.')
   for nr in values(duplicates)
-    let map[nr] = airline#extensions#tabline#formatters#default#wrap_name(nr, fnamemodify(bufname(nr), ':p:.'))
+    let name = bufname(nr)
+    let fnamecollapse = get(g:, 'airline#extensions#tabline#fnamecollapse', 1)
+    if fnamecollapse
+      let map[nr] = airline#extensions#tabline#formatters#default#wrap_name(nr, substitute(fnamemodify(name, fmod), '\v\w\zs.{-}\ze(\\|/)', '', 'g'))
+    else
+      let map[nr] = airline#extensions#tabline#formatters#default#wrap_name(nr, fnamemodify(name, fmod))
+    endif
   endfor
 
   if has_key(map, a:bufnr)

autoload/airline/extensions/tabline/formatters/unique_tail_improved.vim

@@ -1,4 +1,4 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8

autoload/airline/extensions/tabline/tabs.vim

@@ -1,17 +1,9 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
 
-let s:show_close_button = get(g:, 'airline#extensions#tabline#show_close_button', 1)
-let s:show_tab_type = get(g:, 'airline#extensions#tabline#show_tab_type', 1)
-let s:show_tab_nr = get(g:, 'airline#extensions#tabline#show_tab_nr', 1)
-let s:tab_nr_type = get(g:, 'airline#extensions#tabline#tab_nr_type', 0)
-let s:close_symbol = get(g:, 'airline#extensions#tabline#close_symbol', 'X')
-let s:tabs_label = get(g:, 'airline#extensions#tabline#tabs_label', 'tabs')
-let s:show_splits = get(g:, 'airline#extensions#tabline#show_splits', 1)
 let s:spc = g:airline_symbols.space
-
 let s:current_bufnr = -1
 let s:current_tabnr = -1
 let s:current_modified = 0
@@ -36,8 +28,12 @@ endfunction
 function! airline#extensions#tabline#tabs#get()
   let curbuf = bufnr('%')
   let curtab = tabpagenr()
-  call airline#extensions#tabline#tabs#map_keys()
-  if curbuf == s:current_bufnr && curtab == s:current_tabnr
+  try
+    call airline#extensions#tabline#tabs#map_keys()
+  catch
+    " no-op
+  endtry
+  if curbuf == s:current_bufnr && curtab == s:current_tabnr && &columns == s:column_width
     if !g:airline_detect_modified || getbufvar(curbuf, '&modified') == s:current_modified
       return s:current_tabline
     endif
@@ -45,68 +41,94 @@ function! airline#extensions#tabline#tabs#get()
 
   let b = airline#extensions#tabline#new_builder()
 
-  for i in range(1, tabpagenr('$'))
-    if i == curtab
+  call airline#extensions#tabline#add_label(b, 'tabs', 0)
+
+  function! b.get_group(i) dict
+    let curtab = tabpagenr()
+    let group = 'airline_tab'
+    if a:i == curtab
       let group = 'airline_tabsel'
       if g:airline_detect_modified
-        for bi in tabpagebuflist(i)
+        for bi in tabpagebuflist(curtab)
           if getbufvar(bi, '&modified')
             let group = 'airline_tabmod'
           endif
         endfor
       endif
       let s:current_modified = (group == 'airline_tabmod') ? 1 : 0
-    else
-      let group = 'airline_tab'
     endif
+    return group
+  endfunction
+
+  function! b.get_title(i) dict
     let val = '%('
-    if s:show_tab_nr
-      if s:tab_nr_type == 0
-        let val .= (g:airline_symbols.space).'%{len(tabpagebuflist('.i.'))}'
-      elseif s:tab_nr_type == 1
-        let val .= (g:airline_symbols.space).i
-      else "== 2
-        let val .= (g:airline_symbols.space).i.'.%{len(tabpagebuflist('.i.'))}'
-      endif
+
+    if get(g:, 'airline#extensions#tabline#show_tab_nr', 1)
+      let tab_nr_type = get(g:, 'airline#extensions#tabline#tab_nr_type', 0)
+      let val .= airline#extensions#tabline#tabs#tabnr_formatter(tab_nr_type, a:i)
     endif
-    call b.add_section(group, val.'%'.i.'T %{airline#extensions#tabline#title('.i.')} %)')
-  endfor
+
+    return val.'%'.a:i.'T %{airline#extensions#tabline#title('.a:i.')} %)'
+  endfunction
+
+  call b.insert_titles(curtab, 1, tabpagenr('$'))
 
   call b.add_section('airline_tabfill', '')
   call b.split()
   call b.add_section('airline_tabfill', '')
 
-  if s:show_close_button
-    call b.add_section('airline_tab_right', ' %999X'.s:close_symbol.' ')
+  if get(g:, 'airline#extensions#tabline#show_close_button', 1)
+    call b.add_section('airline_tab_right', ' %999X'.
+          \ get(g:, 'airline#extensions#tabline#close_symbol', 'X').' ')
   endif
 
-  if s:show_splits == 1
+  if get(g:, 'airline#extensions#tabline#show_splits', 1) == 1
     let buffers = tabpagebuflist(curtab)
     for nr in buffers
       let group = airline#extensions#tabline#group_of_bufnr(buffers, nr) . "_right"
       call b.add_section_spaced(group, '%(%{airline#extensions#tabline#get_buffer_name('.nr.')}%)')
     endfor
-  elseif s:show_tab_type == 1
-    call b.add_section_spaced('airline_tabtype', s:tabs_label)
+    if get(g:, 'airline#extensions#tabline#show_buffers', 1)
+      call airline#extensions#tabline#add_label(b, 'buffers', 1)
+    endif
   endif
+  call airline#extensions#tabline#add_tab_label(b)
 
   let s:current_bufnr = curbuf
   let s:current_tabnr = curtab
+  let s:column_width = &columns
   let s:current_tabline = b.build()
   return s:current_tabline
 endfunction
 
 function! airline#extensions#tabline#tabs#map_keys()
-  noremap <silent> <Plug>AirlineSelectTab1 :1tabn<CR>
-  noremap <silent> <Plug>AirlineSelectTab2 :2tabn<CR>
-  noremap <silent> <Plug>AirlineSelectTab3 :3tabn<CR>
-  noremap <silent> <Plug>AirlineSelectTab4 :4tabn<CR>
-  noremap <silent> <Plug>AirlineSelectTab5 :5tabn<CR>
-  noremap <silent> <Plug>AirlineSelectTab6 :6tabn<CR>
-  noremap <silent> <Plug>AirlineSelectTab7 :7tabn<CR>
-  noremap <silent> <Plug>AirlineSelectTab8 :8tabn<CR>
-  noremap <silent> <Plug>AirlineSelectTab9 :9tabn<CR>
+  if maparg('<Plug>AirlineSelectTab1', 'n') is# ':1tabn<CR>'
+    return
+  endif
+  let bidx_mode = get(g:, 'airline#extensions#tabline#buffer_idx_mode', 1)
+  if bidx_mode == 1
+    for i in range(1, 9)
+      exe printf('noremap <silent> <Plug>AirlineSelectTab%d :%dtabn<CR>', i, i)
+    endfor
+  else
+      for i in range(11, 99)
+        exe printf('noremap <silent> <Plug>AirlineSelectTab%d :%dtabn<CR>', i, i-10)
+      endfor
+    endif
   noremap <silent> <Plug>AirlineSelectPrevTab gT
   " tabn {count} goes to count tab does not go {count} tab pages forward!
   noremap <silent> <Plug>AirlineSelectNextTab :<C-U>exe repeat(':tabn\|', v:count1)<cr>
 endfunction
+
+function! airline#extensions#tabline#tabs#tabnr_formatter(nr, i) abort
+  let formatter = get(g:, 'airline#extensions#tabline#tabnr_formatter', 'tabnr')
+  try
+    return airline#extensions#tabline#formatters#{formatter}#format(a:nr, a:i)
+  catch /^Vim\%((\a\+)\)\=:E117/	" catch E117, unknown function
+    " Function not found
+    return call(formatter, [a:nr, a:i])
+  catch
+    " something went wrong, return an empty string
+    return ""
+  endtry
+endfunction

autoload/airline/extensions/tabline/tabws.vim

@@ -0,0 +1,154 @@
+" MIT License. Copyright (c) 2016-2020 Kevin Sapper et al.
+" PLugin: https://github.com/s1341/vim-tabws
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+let s:current_bufnr = -1
+let s:current_modified = 0
+let s:current_tabnr = -1
+let s:current_tabline = ''
+let s:highlight_groups = ['hid', 0, '', 'sel', 'mod_unsel', 0, 'mod_unsel', 'mod']
+
+function! airline#extensions#tabline#tabws#off()
+  augroup airline_tabline_tabws
+    autocmd!
+  augroup END
+endfunction
+
+function! airline#extensions#tabline#tabws#on()
+  augroup airline_tabline_tabws
+    autocmd!
+    autocmd BufDelete * call airline#extensions#tabline#tabws#invalidate()
+  augroup END
+endfunction
+
+function! airline#extensions#tabline#tabws#invalidate()
+  let s:current_bufnr = -1
+  let s:current_tabnr = -1
+endfunction
+
+function! airline#extensions#tabline#tabws#add_buffer_section(builder, cur_tab, cur_buf, pull_right)
+  let pos_extension = (a:pull_right ? '_right' : '')
+  let bufnr_list = tabws#getbuffersfortab(a:cur_tab)
+
+  if index(bufnr_list, a:cur_buf) == -1 && a:cur_tab == s:current_tabnr
+    return 0
+  endif
+
+  let s:current_modified = getbufvar(a:cur_buf, '&modified')
+  let visible_list = tabpagebuflist(a:cur_tab)
+
+  for buffer in bufnr_list
+    let group = 'airline_tab'
+          \ .s:highlight_groups[(4 * getbufvar(buffer, '&modified')) + (2 * (index(visible_list, buffer) != -1)) + (a:cur_buf == buffer)]
+          \ .pos_extension
+
+    let buf_name = '%(%{airline#extensions#tabline#get_buffer_name('.buffer.')}%)'
+
+    if has("tablineat")
+      let buf_name = '%'.buffer.'@airline#extensions#tabline#buffers#clickbuf@'.buf_name.'%X'
+    endif
+
+    call a:builder.add_section_spaced(group, buf_name)
+  endfor
+
+  " add by tenfy(tenfyzhong@qq.com)
+  " if the selected buffer was updated
+  " return true
+  return 1
+endfunction
+
+function! airline#extensions#tabline#tabws#add_tab_section(builder, pull_right)
+  let pos_extension = (a:pull_right ? '_right' : '')
+
+  for tab in range(1, tabpagenr('$'))
+    let current = tab == tabpagenr()
+    let group = 'airline_tab'
+          \ .s:highlight_groups[(3 * current)]
+          \ .pos_extension
+
+    if get(g:, 'airline#extensions#tabline#tabws_show_tab_nr', 0) == 0
+      call a:builder.add_section_spaced(group, '%'.tab.'T'.tabws#gettabname(tab).'%T')
+    else
+      call a:builder.add_section_spaced(group, '%'.tab.'T'.tab.(g:airline_symbols.space).tabws#gettabname(tab).'%T')
+    endif
+  endfor
+endfunction
+
+function! airline#extensions#tabline#tabws#get()
+  let cur_buf = bufnr('%')
+  let buffer_label = get(g:, 'airline#extensions#tabline#buffers_label', 'buffers')
+  let tab_label = get(g:, 'airline#extensions#tabline#tabs_label', 'tabs')
+  let switch_buffers_and_tabs = get(g:, 'airline#extensions#tabline#switch_buffers_and_tabs', 0)
+
+  try
+    call airline#extensions#tabline#tabs#map_keys()
+  endtry
+
+  let cur_tab = tabpagenr()
+
+  if cur_buf == s:current_bufnr && cur_tab == s:current_tabnr
+    if !g:airline_detect_modified || getbufvar(cur_buf, '&modified') == s:current_modified
+      return s:current_tabline
+    endif
+  endif
+
+  let builder = airline#extensions#tabline#new_builder()
+
+  let show_buffers = get(g:, 'airline#extensions#tabline#show_buffers', 1)
+  let show_tabs = get(g:, 'airline#extensions#tabline#show_tabs', 1)
+
+  let AppendBuffers = function('airline#extensions#tabline#tabws#add_buffer_section', [builder, cur_tab, cur_buf])
+  let AppendTabs = function('airline#extensions#tabline#tabws#add_tab_section', [builder])
+  let AppendLabel = function(builder.add_section_spaced, ['airline_tabtype'], builder)
+
+  " <= 1: |{Tabs}                      <tab|
+  " == 2: |{Buffers}               <buffers|
+  " == 3: |buffers> {Buffers}  {Tabs} <tabs|
+  let showing_mode = (2 * show_buffers) + (show_tabs)
+  let ignore_update = 0
+
+  " Add left tabline content
+  if showing_mode <= 1 " Tabs only mode
+    call AppendTabs(0)
+  elseif showing_mode == 2 " Buffers only mode
+    let ignore_update = !AppendBuffers(0)
+  else
+    if !switch_buffers_and_tabs
+      call AppendLabel(buffer_label)
+      let ignore_update = !AppendBuffers(0)
+    else
+      call AppendLabel(tab_label)
+      call AppendTabs(0)
+    endif
+  endif
+
+  if ignore_update | return s:current_tabline | endif
+
+  call builder.add_section('airline_tabfill', '')
+  call builder.split()
+  call builder.add_section('airline_tabfill', '')
+
+  " Add right tabline content
+  if showing_mode <= 1 " Tabs only mode
+    call AppendLabel(tab_label)
+  elseif showing_mode == 2 " Buffers only mode
+    call AppendLabel(buffer_label)
+  else
+    if !switch_buffers_and_tabs
+      call AppendTabs(1)
+      call AppendLabel(tab_label)
+    else
+      let ignore_update = AppendBuffers(1)
+      call AppendLabel(buffer_label)
+    endif
+  endif
+
+  if ignore_update | return s:current_tabline | endif
+
+  let s:current_bufnr = cur_buf
+  let s:current_tabnr = cur_tab
+  let s:current_tabline = builder.build()
+  return s:current_tabline
+endfunction

autoload/airline/extensions/tabline/xtabline.vim

@@ -0,0 +1,396 @@
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+" xTabline - Reduced version for vim-airline
+" Plugin: https://github.com/mg979/vim-xtabline
+" MIT License Copyright (C) 2018-2020 Gianmaria Bajo <mg1979.git@gmail.com>
+" tabpagecd:
+" expanded version by mg979
+" MIT License Copyright (C) 2012-2013 Kana Natsuno <http://whileimautomaton.net/>
+" MIT License Copyright (C) 2018-2020 Gianmaria Bajo <mg1979.git@gmail.com>
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+
+function! airline#extensions#tabline#xtabline#init()
+
+    let s:state = 0
+
+    " initialize mappings
+    call airline#extensions#tabline#xtabline#maps()
+
+    """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+    " Variables
+    """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+    let g:loaded_xtabline = 1
+    let s:most_recent = -1
+    let s:xtabline_filtering = 1
+
+    let t:xtl_excluded = get(g:, 'airline#extensions#tabline#exclude_buffers', [])
+    let t:xtl_accepted = []
+
+    let g:xtabline_include_previews = get(g:, 'xtabline_include_previews', 1)
+
+    let g:xtabline_alt_action = get(g:, 'xtabline_alt_action', "buffer #")
+
+
+    """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+    " Autocommands
+    """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+    augroup plugin-xtabline
+        autocmd!
+
+        autocmd TabNew    * call s:Do('new')
+        autocmd TabEnter  * call s:Do('enter')
+        autocmd TabLeave  * call s:Do('leave')
+        autocmd TabClosed * call s:Do('close')
+
+        autocmd BufEnter  * let g:xtabline_changing_buffer = 0
+        autocmd BufAdd,BufDelete,BufWrite * call airline#extensions#tabline#xtabline#filter_buffers()
+    augroup END
+
+
+    """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+    " Commands
+    """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+    com! XTabReopen call airline#extensions#tabline#xtabline#reopen_last_tab()
+
+endfunction
+
+
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+" Mappings
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+function! airline#extensions#tabline#xtabline#maps()
+
+    if !exists('g:xtabline_disable_keybindings')
+
+        fun! s:mapkeys(keys, plug)
+            if empty(mapcheck(a:keys)) && !hasmapto(a:plug)
+                silent! execute 'nmap <unique> '.a:keys.' '.a:plug
+            endif
+        endfun
+
+        call s:mapkeys('<F5>','<Plug>XTablineToggleTabs')
+        call s:mapkeys('<leader><F5>','<Plug>XTablineToggleFiltering')
+        call s:mapkeys('<BS>','<Plug>XTablineSelectBuffer')
+        call s:mapkeys(']l','<Plug>XTablineNextBuffer')
+        call s:mapkeys('[l','<Plug>XTablinePrevBuffer')
+        call s:mapkeys('<leader>tr','<Plug>XTablineReopen')
+    endif
+
+    nnoremap <unique> <script> <Plug>XTablineToggleTabs <SID>ToggleTabs
+    nnoremap <silent> <SID>ToggleTabs :call airline#extensions#tabline#xtabline#toggle_tabs()<cr>
+
+    nnoremap <unique> <script> <Plug>XTablineToggleFiltering <SID>ToggleFiltering
+    nnoremap <silent> <SID>ToggleFiltering :call airline#extensions#tabline#xtabline#toggle_buffers()<cr>
+
+    nnoremap <unique> <script> <Plug>XTablineSelectBuffer <SID>SelectBuffer
+    nnoremap <silent> <expr> <SID>SelectBuffer g:xtabline_changing_buffer ? "\<C-c>" : ":<C-u>call airline#extensions#tabline#xtabline#select_buffer(v:count)\<cr>"
+
+    nnoremap <unique> <script> <Plug>XTablineNextBuffer <SID>NextBuffer
+    nnoremap <silent> <expr> <SID>NextBuffer airline#extensions#tabline#xtabline#next_buffer(v:count1)
+
+    nnoremap <unique> <script> <Plug>XTablinePrevBuffer <SID>PrevBuffer
+    nnoremap <silent> <expr> <SID>PrevBuffer airline#extensions#tabline#xtabline#prev_buffer(v:count1)
+
+    nnoremap <unique> <script> <Plug>XTablineReopen <SID>ReopenLastTab
+    nnoremap <silent> <SID>ReopenLastTab :XTabReopen<cr>
+
+    if get(g:, 'xtabline_cd_commands', 0)
+        map <unique> <leader>cdc <Plug>XTablineCdCurrent
+        map <unique> <leader>cdd <Plug>XTablineCdDown1
+        map <unique> <leader>cd2 <Plug>XTablineCdDown2
+        map <unique> <leader>cd3 <Plug>XTablineCdDown3
+        map <unique> <leader>cdh <Plug>XTablineCdHome
+        nnoremap <unique> <script> <Plug>XTablineCdCurrent :cd %:p:h<cr>:call airline#util#doautocmd('BufAdd')<cr>:pwd<cr>
+        nnoremap <unique> <script> <Plug>XTablineCdDown1   :cd %:p:h:h<cr>:call airline#util#doautocmd('BufAdd')<cr>:pwd<cr>
+        nnoremap <unique> <script> <Plug>XTablineCdDown2   :cd %:p:h:h:h<cr>:call airline#util#doautocmd('BufAdd')<cr>:pwd<cr>
+        nnoremap <unique> <script> <Plug>XTablineCdDown3   :cd %:p:h:h:h:h<cr>:call airline#util#doautocmd('BufAdd')<cr>:pwd<cr>
+        nnoremap <unique> <script> <Plug>XTablineCdHome    :cd ~<cr>:call airline#util#doautocmd('BufAdd')<cr>:pwd<cr>
+    endif
+endfunction
+
+
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+" Commands functions
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+function! airline#extensions#tabline#xtabline#toggle_tabs()
+    """Toggle between tabs/buffers tabline."""
+
+    if tabpagenr("$") == 1 | call airline#util#warning("There is only one tab.") | return | endif
+
+    if g:airline#extensions#tabline#show_tabs
+        let g:airline#extensions#tabline#show_tabs = 0
+        call airline#util#warning("Showing buffers")
+    else
+        let g:airline#extensions#tabline#show_tabs = 1
+        call airline#util#warning("Showing tabs")
+    endif
+
+    doautocmd BufAdd
+endfunction
+
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+function! airline#extensions#tabline#xtabline#toggle_buffers()
+    """Toggle buffer filtering in the tabline."""
+
+    if s:xtabline_filtering
+        let s:xtabline_filtering = 0
+        let g:airline#extensions#tabline#exclude_buffers = []
+        call airline#util#warning("Buffer filtering turned off")
+        doautocmd BufAdd
+    else
+        let s:xtabline_filtering = 1
+        call airline#extensions#tabline#xtabline#filter_buffers()
+        call airline#util#warning("Buffer filtering turned on")
+        doautocmd BufAdd
+    endif
+endfunction
+
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+function! airline#extensions#tabline#xtabline#reopen_last_tab()
+    """Reopen the last closed tab."""
+
+    if !exists('s:most_recently_closed_tab')
+        call airline#util#warning("No recent tabs.")
+        return
+    endif
+
+    let tab = s:most_recently_closed_tab
+    tabnew
+    let empty = bufnr("%")
+    let t:cwd = tab['cwd']
+    cd `=t:cwd`
+    let t:name = tab['name']
+    for buf in tab['buffers'] | execute "badd ".buf | endfor
+    execute "edit ".tab['buffers'][0]
+    execute "bdelete ".empty
+endfunction
+
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+function! airline#extensions#tabline#xtabline#filter_buffers()
+    """Filter buffers so that only the ones within the tab's cwd will show up.
+
+    " 'accepted' is a list of buffer numbers, for quick access.
+    " 'excluded' is a list of buffer numbers, it will be used by Airline to hide buffers.
+
+    if !s:xtabline_filtering | return | endif
+
+    let g:airline#extensions#tabline#exclude_buffers = []
+    let t:xtl_excluded = g:airline#extensions#tabline#exclude_buffers
+    let t:xtl_accepted = [] | let accepted = t:xtl_accepted
+    let previews = g:xtabline_include_previews
+
+    " bufnr(0) is the alternate buffer
+    for buf in range(1, bufnr("$"))
+
+        if !buflisted(buf) | continue | endif
+
+        " get the path
+        let path = expand("#".buf.":p")
+
+        " confront with the cwd
+        if !previews && path =~ "^".getcwd()
+            call add(accepted, buf)
+        elseif previews && path =~ getcwd()
+            call add(accepted, buf)
+        else
+            call add(t:xtl_excluded, buf)
+        endif
+    endfor
+
+    call s:RefreshTabline()
+endfunction
+
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+function! airline#extensions#tabline#xtabline#next_buffer(nr)
+    """Switch to next visible buffer."""
+
+    if ( s:NotEnoughBuffers() || !s:xtabline_filtering ) | return | endif
+    let accepted = t:xtl_accepted
+
+    let ix = index(accepted, bufnr("%"))
+    let target = ix + a:nr
+    let total = len(accepted)
+
+    if ix == -1
+        " not in index, go back to most recent or back to first
+        if s:most_recent == -1 || s:most_recent >= total
+            let s:most_recent = 0
+        endif
+
+    elseif target >= total
+        " over last buffer
+        while target >= total | let target -= total | endwhile
+        let s:most_recent = target
+
+    else
+        let s:most_recent = target
+    endif
+
+    return ":buffer " . accepted[s:most_recent] . "\<cr>"
+endfunction
+
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+function! airline#extensions#tabline#xtabline#prev_buffer(nr)
+    """Switch to previous visible buffer."""
+
+    if ( s:NotEnoughBuffers() || !s:xtabline_filtering ) | return | endif
+    let accepted = t:xtl_accepted
+
+    let ix = index(accepted, bufnr("%"))
+    let target = ix - a:nr
+    let total = len(accepted)
+
+    if ix == -1
+        " not in index, go back to most recent or back to first
+        if s:most_recent == -1 || s:most_recent >= total
+            let s:most_recent = 0
+        endif
+
+    elseif target < 0
+        " before first buffer
+        while target < 0 | let target += total | endwhile
+        let s:most_recent = target
+
+    else
+        let s:most_recent = target
+    endif
+
+    return ":buffer " . accepted[s:most_recent] . "\<cr>"
+endfunction
+
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+function! airline#extensions#tabline#xtabline#select_buffer(nr)
+    """Switch to visible buffer in the tabline with [count]."""
+
+    if ( a:nr == 0 || !s:xtabline_filtering ) | execute g:xtabline_alt_action | return | endif
+    let accepted = t:xtl_accepted
+
+    if (a:nr > len(accepted)) || s:NotEnoughBuffers() || accepted[a:nr - 1] == bufnr("%")
+        return
+    else
+        let g:xtabline_changing_buffer = 1
+        execute "buffer ".accepted[a:nr - 1]
+    endif
+endfunction
+
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+function! s:TabBuffers()
+    """Return a list of buffers names for this tab."""
+
+    return map(copy(t:xtl_accepted), 'bufname(v:val)')
+endfunction
+
+
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+" Helper functions
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+function! s:NotEnoughBuffers()
+    """Just return if there aren't enough buffers."""
+
+    if len(t:xtl_accepted) < 2
+        if index(t:xtl_accepted, bufnr("%")) == -1
+            return
+        elseif !len(t:xtl_accepted)
+            call airline#util#warning("No available buffers for this tab.")
+        else
+            call airline#util#warning("No other available buffers for this tab.")
+        endif
+        return 1
+    endif
+endfunction
+
+function! s:RefreshTabline()
+    call airline#extensions#tabline#buflist#invalidate()
+endfunction
+
+
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+" TabPageCd
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+" tabpagecd - Turn :cd into :tabpagecd, to use one tab page per project
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+function! s:InitCwds()
+    if !exists('g:xtab_cwds') | let g:xtab_cwds = [] | endif
+
+    while len(g:xtab_cwds) < tabpagenr("$")
+        call add(g:xtab_cwds, getcwd())
+    endwhile
+    let s:state    = 1
+    let t:cwd      = getcwd()
+    let s:last_tab = 0
+    call airline#extensions#tabline#xtabline#filter_buffers()
+endfunction
+
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+function! airline#extensions#tabline#xtabline#update_obsession()
+    let string = 'let g:xtab_cwds = '.string(g:xtab_cwds).' | call airline#extensions#tabline#xtabline#update_obsession()'
+    if !exists('g:obsession_append')
+        let g:obsession_append = [string]
+    else
+        call filter(g:obsession_append, 'v:val !~# "^let g:xtab_cwds"')
+        call add(g:obsession_append, string)
+    endif
+endfunction
+
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+function! s:Do(action)
+    let arg = a:action
+    if !s:state | call s:InitCwds() | return | endif
+
+    """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+    if arg == 'new'
+
+        call insert(g:xtab_cwds, getcwd(), tabpagenr()-1)
+
+    """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+    elseif arg == 'enter'
+
+        let t:cwd =g:xtab_cwds[tabpagenr()-1]
+
+        cd `=t:cwd`
+        call airline#extensions#tabline#xtabline#filter_buffers()
+
+    """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+    elseif arg == 'leave'
+
+        let t:cwd = getcwd()
+        let g:xtab_cwds[tabpagenr()-1] = t:cwd
+        let s:last_tab = tabpagenr() - 1
+
+        if !exists('t:name') | let t:name = t:cwd | endif
+        let s:most_recent_tab = {'cwd': t:cwd, 'name': t:name, 'buffers': s:TabBuffers()}
+
+    """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+    elseif arg == 'close'
+
+        let s:most_recently_closed_tab = copy(s:most_recent_tab)
+        call remove(g:xtab_cwds, s:last_tab)
+    endif
+
+    """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+    call airline#extensions#tabline#xtabline#update_obsession()
+endfunction
+
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""

autoload/airline/extensions/tagbar.vim

@@ -1,4 +1,5 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" Plugin: https://github.com/majutsushi/tagbar
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -9,6 +10,7 @@ endif
 
 let s:flags = get(g:, 'airline#extensions#tagbar#flags', '')
 let s:spc = g:airline_symbols.space
+let s:init=0
 
 " Arguments: current, sort, fname
 function! airline#extensions#tagbar#get_status(...)
@@ -29,7 +31,18 @@ let s:airline_tagbar_last_lookup_time = 0
 let s:airline_tagbar_last_lookup_val = ''
 function! airline#extensions#tagbar#currenttag()
   if get(w:, 'airline_active', 0)
-    if s:airline_tagbar_last_lookup_time != localtime()
+    if !s:init
+      try
+        " try to load the plugin, if filetypes are disabled,
+        " this will cause an error, so try only once
+        let a=tagbar#currenttag('%', '', '')
+      catch
+      endtry
+      unlet! a
+      let s:init=1
+    endif
+    " function tagbar#currenttag does not exist, if filetype is not enabled
+    if s:airline_tagbar_last_lookup_time != localtime() && exists("*tagbar#currenttag")
       let s:airline_tagbar_last_lookup_val = tagbar#currenttag('%s', '', s:flags)
       let s:airline_tagbar_last_lookup_time = localtime()
     endif
@@ -44,4 +57,3 @@ function! airline#extensions#tagbar#init(ext)
 
   call airline#parts#define_function('tagbar', 'airline#extensions#tagbar#currenttag')
 endfunction
-

autoload/airline/extensions/term.vim

@@ -0,0 +1,80 @@
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+call airline#parts#define_function('tmode', 'airline#extensions#term#termmode')
+call airline#parts#define('terminal', {'text': get(g:airline_mode_map, 't', 't'), 'accent': 'bold'})
+
+let s:spc = g:airline_symbols.space
+
+let s:section_a = airline#section#create_left(['terminal', 'tmode'])
+let s:section_z = airline#section#create(['linenr', 'maxlinenr'])
+
+function! airline#extensions#term#apply(...) abort
+  if &buftype ==? 'terminal' || bufname(a:2.bufnr)[0] ==? '!'
+    call a:1.add_section_spaced('airline_a', s:section_a)
+    call a:1.add_section_spaced('airline_b', s:neoterm_id(a:2.bufnr))
+    call a:1.add_section('airline_term', s:spc.s:termname(a:2.bufnr))
+    call a:1.split()
+    call a:1.add_section('airline_y', '')
+    call a:1.add_section_spaced('airline_z', s:section_z)
+    return 1
+  endif
+endfunction
+
+function! airline#extensions#term#inactive_apply(...) abort
+  if getbufvar(a:2.bufnr, '&buftype') ==? 'terminal'
+    call a:1.add_section_spaced('airline_a', s:section_a)
+    call a:1.add_section_spaced('airline_b', s:neoterm_id(a:2.bufnr))
+    call a:1.add_section('airline_term', s:spc.s:termname(a:2.bufnr))
+    call a:1.split()
+    call a:1.add_section('airline_y', '')
+    call a:1.add_section_spaced('airline_z', s:section_z)
+    return 1
+  endif
+endfunction
+
+function! airline#extensions#term#termmode() abort
+  let mode = airline#parts#mode()[0]
+  if mode ==? 'T' || mode ==? '-'
+    " We don't need to output T, the statusline already says "TERMINAL".
+    " Also we don't want to output "-" on an inactive statusline.
+    let mode = ''
+  endif
+  return mode
+endfunction
+
+function! s:termname(bufnr) abort
+  let bufname = bufname(a:bufnr)
+  if has('nvim')
+    " Get rid of the leading "term", working dir and process ID.
+    " Afterwards, remove the possibly added neoterm ID.
+    return substitute(matchstr(bufname, 'term.*:\zs.*'),
+                    \ ';#neoterm-\d\+', '', '')
+  else
+    if bufname =~? 'neoterm-\d\+'
+      " Do not return a redundant buffer name, when this is a neoterm terminal.
+      return ''
+    endif
+    " Get rid of the leading "!".
+    if bufname[0] ==? '!'
+      return bufname[1:]
+    else
+      return bufname
+    endif
+  endif
+endfunction
+
+function! s:neoterm_id(bufnr) abort
+  let id = getbufvar(a:bufnr, 'neoterm_id')
+  if id !=? ''
+    let id = 'neoterm-'.id
+  endif
+  return id
+endfunction
+
+function! airline#extensions#term#init(ext) abort
+  call a:ext.add_statusline_func('airline#extensions#term#apply')
+  call a:ext.add_inactive_statusline_func('airline#extensions#term#inactive_apply')
+endfunction

autoload/airline/extensions/tmuxline.vim

@@ -1,4 +1,5 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" Plugin: https://github.com/edkolev/tmuxline.vim
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -25,4 +26,3 @@ function! airline#extensions#tmuxline#set_tmux_colors(palette)
     call tmuxline#api#snapshot(s:tmuxline_snapshot_file)
   endif
 endfunction
-

autoload/airline/extensions/undotree.vim

@@ -1,4 +1,5 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" Plugin: https://github.com/mbbill/undotree
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -11,14 +12,14 @@ function! airline#extensions#undotree#apply(...)
   if exists('t:undotree')
     if &ft == 'undotree'
       if exists('*t:undotree.GetStatusLine')
-        call airline#extensions#apply_left_override('undo', '%{t:undotree.GetStatusLine()}')
+        call airline#extensions#apply_left_override('undo', '%{exists("t:undotree") ? t:undotree.GetStatusLine() : ""}')
       else
         call airline#extensions#apply_left_override('undotree', '%f')
       endif
     endif
 
     if &ft == 'diff' && exists('*t:diffpanel.GetStatusLine')
-      call airline#extensions#apply_left_override('diff', '%{t:diffpanel.GetStatusLine()}')
+      call airline#extensions#apply_left_override('diff', '%{exists("t:diffpanel") ? t:diffpanel.GetStatusLine() : ""}')
     endif
   endif
 endfunction
@@ -26,4 +27,3 @@ endfunction
 function! airline#extensions#undotree#init(ext)
   call a:ext.add_statusline_func('airline#extensions#undotree#apply')
 endfunction
-

autoload/airline/extensions/unicode.vim

@@ -1,4 +1,5 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling, Christian Brabandt et al.
+" Plugin: https://github.com/chrisbra/unicode.vim
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -14,7 +15,7 @@ function! airline#extensions#unicode#apply(...)
           \ 'accent': 'bold' })
     let w:airline_section_a = airline#section#create(['unicode'])
     let w:airline_section_b = ''
-    let w:airline_section_c = ''
+    let w:airline_section_c = ' '
     let w:airline_section_y = ''
   endif
 endfunction

autoload/airline/extensions/unite.vim

@@ -1,4 +1,5 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" Plugin: https://github.com/Shougo/unite.vim
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -22,4 +23,3 @@ function! airline#extensions#unite#init(ext)
   let g:unite_force_overwrite_statusline = 0
   call a:ext.add_statusline_func('airline#extensions#unite#apply')
 endfunction
-

autoload/airline/extensions/vimagit.vim

@@ -1,29 +1,29 @@
-" MIT License. Copyright (c) 2016 Jerome Reybert
+" MIT License. Copyright (c) 2016-2020 Jerome Reybert et al.
+" Plugin: https://github.com/jreybert/vimagit
 " vim: et ts=2 sts=2 sw=2
 
-" This plugin replace the whole section_a when in vimagit buffer
+" This plugin replaces the whole section_a when in vimagit buffer
 scriptencoding utf-8
 
 if !get(g:, 'loaded_magit', 0)
   finish
 endif
 
-function! airline#extensions#vimagit#init(ext)
+let s:commit_mode = {'ST': 'STAGING', 'CC': 'COMMIT', 'CA': 'AMEND'}
+
+function! airline#extensions#vimagit#init(ext) abort
   call a:ext.add_statusline_func('airline#extensions#vimagit#apply')
 endfunction
 
-function! airline#extensions#vimagit#get_mode()
-	if ( b:magit_current_commit_mode == '' )
-		return "STAGING"
-	elseif ( b:magit_current_commit_mode == 'CC' )
-		return "COMMIT"
-	elseif ( b:magit_current_commit_mode == 'CA' )
-		return "AMEND"
-	else
-		return "???"
+function! airline#extensions#vimagit#get_mode() abort
+  if ( exists("*magit#get_current_mode") )
+    return magit#get_current_mode()
+  else
+    return get(s:commit_mode, b:magit_current_commit_mode, '???')
+  endif
 endfunction
 
-function! airline#extensions#vimagit#apply(...)
+function! airline#extensions#vimagit#apply(...) abort
   if ( &filetype == 'magit' )
     let w:airline_section_a = '%{airline#extensions#vimagit#get_mode()}'
   endif

autoload/airline/extensions/vimcmake.vim

@@ -0,0 +1,30 @@
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" Plugin: https://github.com/cdelledonne/vim-cmake
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+function! airline#extensions#vimcmake#init(ext) abort
+  call a:ext.add_statusline_func('airline#extensions#vimcmake#apply')
+  call a:ext.add_inactive_statusline_func('airline#extensions#vimcmake#inactive_apply')
+endfunction
+
+function! airline#extensions#vimcmake#apply(...) abort
+  if &filetype ==# 'vimcmake'
+    let spc = g:airline_symbols.space
+    call a:1.add_section('airline_a', spc.'CMake'.spc)
+    call a:1.add_section('airline_b', spc.'%{cmake#statusline#GetBuildInfo(1)}'.spc)
+    call a:1.add_section('airline_c', spc.'%{cmake#statusline#GetCmdInfo()}'.spc)
+    return 1
+  endif
+endfunction
+
+function! airline#extensions#vimcmake#inactive_apply(...) abort
+  if getbufvar(a:2.bufnr, '&filetype') ==# 'vimcmake'
+    let spc = g:airline_symbols.space
+    call a:1.add_section('airline_a', spc.'[CMake]')
+    call a:1.add_section('airline_b', spc.'%{cmake#statusline#GetBuildInfo(0)}')
+    call a:1.add_section('airline_c', spc.'%{cmake#statusline#GetCmdInfo()}')
+    return 1
+  endif
+endfunction

autoload/airline/extensions/vimtex.vim

@@ -1,3 +1,7 @@
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" Plugin: https://github.com/lervag/vimtex
+" vim: et ts=2 sts=2 sw=2
+
 scriptencoding utf-8
 
 let s:spc = g:airline_symbols.space
@@ -78,4 +82,3 @@ function! airline#extensions#vimtex#get_scope()
   endif
   return l:status
 endfunction
-

autoload/airline/extensions/virtualenv.vim

@@ -1,4 +1,5 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" Plugin: https://github.com/jmcantrell/vim-virtualenv
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8

autoload/airline/extensions/vista.vim

@@ -0,0 +1,18 @@
+" MIT License. Copyright (c) 2020 s1341 (github@shmarya.net)
+" Plugin: https://github.com/liuchengxu/vista.vim
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+if !get(g:, 'loaded_vista', 0)
+  finish
+endif
+
+function! airline#extensions#vista#currenttag() abort
+  if get(w:, 'airline_active', 0)
+    return airline#util#shorten(get(b:, 'vista_nearest_method_or_function', ''), 91, 9)
+  endif
+endfunction
+
+function! airline#extensions#vista#init(ext) abort
+  call airline#parts#define_function('vista', 'airline#extensions#vista#currenttag')
+endfunction

autoload/airline/extensions/whitespace.vim

@@ -1,4 +1,4 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
 " vim: et ts=2 sts=2 sw=2
 
 " http://got-ravings.blogspot.com/2008/10/vim-pr0n-statusline-whitespace-flags.html
@@ -7,20 +7,15 @@ scriptencoding utf-8
 
 let s:show_message = get(g:, 'airline#extensions#whitespace#show_message', 1)
 let s:symbol = get(g:, 'airline#extensions#whitespace#symbol', g:airline_symbols.whitespace)
-let s:default_checks = ['indent', 'trailing', 'mixed-indent-file']
+let s:default_checks = ['indent', 'trailing', 'mixed-indent-file', 'conflicts']
 
-let s:trailing_format = get(g:, 'airline#extensions#whitespace#trailing_format', '[%s]trailing')
-let s:mixed_indent_format = get(g:, 'airline#extensions#whitespace#mixed_indent_format', '[%s]mixed-indent')
-let s:long_format = get(g:, 'airline#extensions#whitespace#long_format', '[%s]long')
-let s:mixed_indent_file_format = get(g:, 'airline#extensions#whitespace#mixed_indent_file_format', '[%s]mix-indent-file')
-let s:indent_algo = get(g:, 'airline#extensions#whitespace#mixed_indent_algo', 0)
-let s:skip_check_ft = {'make': ['indent', 'mixed-indent-file'] }
-let s:max_lines = get(g:, 'airline#extensions#whitespace#max_lines', 20000)
 let s:enabled = get(g:, 'airline#extensions#whitespace#enabled', 1)
-let s:c_like_langs = get(g:, 'airline#extensions#c_like_langs', [ 'c', 'cpp', 'cuda', 'go', 'javascript', 'ld', 'php' ])
+let s:skip_check_ft = {'make': ['indent', 'mixed-indent-file'],
+      \ 'csv': ['indent', 'mixed-indent-file']}
 
 function! s:check_mixed_indent()
-  if s:indent_algo == 1
+  let indent_algo = get(g:, 'airline#extensions#whitespace#mixed_indent_algo', 0)
+  if indent_algo == 1
     " [<tab>]<space><tab>
     " spaces before or between tabs are not allowed
     let t_s_t = '(^\t* +\t\s*\S)'
@@ -28,15 +23,17 @@ function! s:check_mixed_indent()
     " count of spaces at the end of tabs should be less than tabstop value
     let t_l_s = '(^\t+ {' . &ts . ',}' . '\S)'
     return search('\v' . t_s_t . '|' . t_l_s, 'nw')
-  elseif s:indent_algo == 2
-    return search('\v(^\t* +\t\s*\S)', 'nw')
+  elseif indent_algo == 2
+    return search('\v(^\t* +\t\s*\S)', 'nw', 0, 500)
   else
-    return search('\v(^\t+ +)|(^ +\t+)', 'nw')
+    return search('\v(^\t+ +)|(^ +\t+)', 'nw', 0, 500)
   endif
 endfunction
 
 function! s:check_mixed_indent_file()
-  if index(s:c_like_langs, &ft) > -1
+  let c_like_langs = get(g:, 'airline#extensions#c_like_langs',
+        \ [ 'arduino', 'c', 'cpp', 'cuda', 'go', 'javascript', 'ld', 'php' ])
+  if index(c_like_langs, &ft) > -1
     " for C-like languages: allow /** */ comment style with one space before the '*'
     let head_spc = '\v(^ +\*@!)'
   else
@@ -51,23 +48,39 @@ function! s:check_mixed_indent_file()
   endif
 endfunction
 
+function! s:conflict_marker()
+  " Checks for git conflict markers
+  let annotation = '\%([0-9A-Za-z_.:]\+\)\?'
+  if &ft is# 'rst'
+    " rst filetypes use '=======' as header
+    let pattern = '^\%(\%(<\{7} '.annotation. '\)\|\%(>\{7\} '.annotation.'\)\)$'
+  else
+    let pattern = '^\%(\%(<\{7} '.annotation. '\)\|\%(=\{7\}\)\|\%(>\{7\} '.annotation.'\)\)$'
+  endif
+  return search(pattern, 'nw')
+endfunction
+
 function! airline#extensions#whitespace#check()
-  if &readonly || !&modifiable || !s:enabled || line('$') > s:max_lines
+  let max_lines = get(g:, 'airline#extensions#whitespace#max_lines', 20000)
+  if &readonly || !&modifiable || !s:enabled || line('$') > max_lines
           \ || get(b:, 'airline_whitespace_disabled', 0)
     return ''
   endif
+  let skip_check_ft = extend(s:skip_check_ft,
+        \ get(g:, 'airline#extensions#whitespace#skip_indent_check_ft', {}), 'force')
 
   if !exists('b:airline_whitespace_check')
     let b:airline_whitespace_check = ''
     let checks = get(b:, 'airline_whitespace_checks', get(g:, 'airline#extensions#whitespace#checks', s:default_checks))
 
     let trailing = 0
-    if index(checks, 'trailing') > -1
+    let check = 'trailing'
+    if index(checks, check) > -1 && index(get(skip_check_ft, &ft, []), check) < 0
       try
         let regexp = get(g:, 'airline#extensions#whitespace#trailing_regexp', '\s$')
         let trailing = search(regexp, 'nw')
       catch
-        echomsg 'airline#whitespace: error occured evaluating '. regexp
+        call airline#util#warning(printf('Whitespace: error occurred evaluating "%s"', regexp))
         echomsg v:exception
         return ''
       endtry
@@ -75,13 +88,13 @@ function! airline#extensions#whitespace#check()
 
     let mixed = 0
     let check = 'indent'
-    if index(checks, check) > -1 && index(get(s:skip_check_ft, &ft, []), check) < 0
+    if index(checks, check) > -1 && index(get(skip_check_ft, &ft, []), check) < 0
       let mixed = s:check_mixed_indent()
     endif
 
     let mixed_file = ''
     let check = 'mixed-indent-file'
-    if index(checks, check) > -1 && index(get(s:skip_check_ft, &ft, []), check) < 0
+    if index(checks, check) > -1 && index(get(skip_check_ft, &ft, []), check) < 0
       let mixed_file = s:check_mixed_indent_file()
     endif
 
@@ -90,7 +103,12 @@ function! airline#extensions#whitespace#check()
       let long = search('\%>'.&tw.'v.\+', 'nw')
     endif
 
-    if trailing != 0 || mixed != 0 || long != 0 || !empty(mixed_file)
+    let conflicts = 0
+    if index(checks, 'conflicts') > -1
+      let conflicts = s:conflict_marker()
+    endif
+
+    if trailing != 0 || mixed != 0 || long != 0 || !empty(mixed_file) || conflicts != 0
       let b:airline_whitespace_check = s:symbol
       if strlen(s:symbol) > 0
         let space = (g:airline_symbols.space)
@@ -100,16 +118,24 @@ function! airline#extensions#whitespace#check()
 
       if s:show_message
         if trailing != 0
-          let b:airline_whitespace_check .= space.printf(s:trailing_format, trailing)
+          let trailing_fmt = get(g:, 'airline#extensions#whitespace#trailing_format', '[%s]trailing')
+          let b:airline_whitespace_check .= space.printf(trailing_fmt, trailing)
         endif
         if mixed != 0
-          let b:airline_whitespace_check .= space.printf(s:mixed_indent_format, mixed)
+          let mixed_indent_fmt = get(g:, 'airline#extensions#whitespace#mixed_indent_format', '[%s]mixed-indent')
+          let b:airline_whitespace_check .= space.printf(mixed_indent_fmt, mixed)
         endif
         if long != 0
-          let b:airline_whitespace_check .= space.printf(s:long_format, long)
+          let long_fmt = get(g:, 'airline#extensions#whitespace#long_format', '[%s]long')
+          let b:airline_whitespace_check .= space.printf(long_fmt, long)
         endif
         if !empty(mixed_file)
-          let b:airline_whitespace_check .= space.printf(s:mixed_indent_file_format, mixed_file)
+          let mixed_indent_file_fmt = get(g:, 'airline#extensions#whitespace#mixed_indent_file_format', '[%s]mix-indent-file')
+          let b:airline_whitespace_check .= space.printf(mixed_indent_file_fmt, mixed_file)
+        endif
+        if conflicts != 0
+          let conflicts_fmt = get(g:, 'airline#extensions#whitespace#conflicts_format', '[%s]conflicts')
+          let b:airline_whitespace_check .= space.printf(conflicts_fmt, conflicts)
         endif
       endif
     endif
@@ -136,7 +162,7 @@ function! airline#extensions#whitespace#toggle()
       call airline#update_statusline()
     endif
   endif
-  echo 'Whitespace checking: '.(s:enabled ? 'Enabled' : 'Disabled')
+  call airline#util#warning(printf('Whitespace checking: %s',(s:enabled ? 'Enabled' : 'Disabled')))
 endfunction
 
 function! airline#extensions#whitespace#disable()
@@ -161,7 +187,7 @@ function! s:ws_refresh()
   endif
   unlet! b:airline_whitespace_check
   if get(g:, 'airline_skip_empty_sections', 0)
-    exe ':AirlineRefresh'
+    exe ':AirlineRefresh!'
   endif
   let b:airline_ws_changedtick = b:changedtick
 endfunction

autoload/airline/extensions/windowswap.vim

@@ -1,3 +1,5 @@
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" Plugin: https://github.com/wesQ3/vim-windowswap
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -26,4 +28,3 @@ function! airline#extensions#windowswap#get_status()
   endif
   return ''
 endfunction
-

autoload/airline/extensions/wordcount.vim

@@ -1,43 +1,118 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
-" vim: et ts=2 sts=2 sw=2
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" vim: et ts=2 sts=2 sw=2 fdm=marker
 
 scriptencoding utf-8
 
-let s:formatter = get(g:, 'airline#extensions#wordcount#formatter', 'default')
-let g:airline#extensions#wordcount#filetypes = get(g:, 'airline#extensions#wordcount#filetypes',
-      \ '\vhelp|markdown|rst|org|text|asciidoc|tex|mail')
-
-function! s:wordcount_update()
-  if empty(bufname(''))
-    return
-  endif
-  if match(&ft, get(g:, 'airline#extensions#wordcount#filetypes')) > -1
-    let l:mode = mode()
-    if l:mode ==# 'v' || l:mode ==# 'V' || l:mode ==# 's' || l:mode ==# 'S'
-      let b:airline_wordcount = airline#extensions#wordcount#formatters#{s:formatter}#format()
-      let b:airline_change_tick = b:changedtick
-    else
-      if get(b:, 'airline_wordcount_cache', '') is# '' ||
-            \ b:airline_wordcount_cache isnot# get(b:, 'airline_wordcount', '') ||
-            \ get(b:, 'airline_change_tick', 0) != b:changedtick || 
-            \ get(b:, 'airline_winwidth', 0) != winwidth(0)
-        " cache data
-        let b:airline_wordcount = airline#extensions#wordcount#formatters#{s:formatter}#format()
-        let b:airline_wordcount_cache = b:airline_wordcount
-        let b:airline_change_tick = b:changedtick
-        let b:airline_winwidth = winwidth(0)
-      endif
+" get wordcount {{{1
+if exists('*wordcount')
+  function! s:get_wordcount(visual_mode_active)
+    if get(g:, 'actual_curbuf', '') != bufnr('')
+      return
     endif
+    let query = a:visual_mode_active ? 'visual_words' : 'words'
+    return get(wordcount(), query, 0)
+  endfunction
+else  " Pull wordcount from the g_ctrl-g stats
+  function! s:get_wordcount(visual_mode_active)
+    let pattern = a:visual_mode_active
+          \ ? '^.\D*\d\+\D\+\d\+\D\+\zs\d\+'
+          \ : '^.\D*\%(\d\+\D\+\)\{5}\zs\d\+'
+
+    let save_status = v:statusmsg
+    if !a:visual_mode_active && col('.') == col('$')
+      let save_pos = getpos('.')
+      execute "silent normal! g\<c-g>"
+      call setpos('.', save_pos)
+    else
+      execute "silent normal! g\<c-g>"
+    endif
+    let stats = v:statusmsg
+    let v:statusmsg = save_status
+
+    return str2nr(matchstr(stats, pattern))
+  endfunction
+endif
+
+" format {{{1
+let s:formatter = get(g:, 'airline#extensions#wordcount#formatter', 'default')
+
+" wrapper function for compatibility; redefined below for old-style formatters
+function! s:format_wordcount(wordcount)
+  return airline#extensions#wordcount#formatters#{s:formatter}#to_string(a:wordcount)
+endfunction
+
+" check user-defined formatter exists with appropriate functions, otherwise
+" fall back to default
+if s:formatter !=# 'default'
+  execute 'runtime! autoload/airline/extensions/wordcount/formatters/'.s:formatter.'.vim'
+  if !exists('*airline#extensions#wordcount#formatters#{s:formatter}#to_string')
+    if !exists('*airline#extensions#wordcount#formatters#{s:formatter}#format')
+      let s:formatter = 'default'
+    else
+      " redefine for backwords compatibility
+      function! s:format_wordcount(_)
+        if mode() ==? 'v'
+          return b:airline_wordcount
+        else
+          return airline#extensions#wordcount#formatters#{s:formatter}#format()
+        endif
+      endfunction
+    endif
+  endif
+endif
+
+" update {{{1
+let s:wordcount_cache = 0  " cache wordcount for performance when force_update=0
+function! s:update_wordcount(force_update)
+  let wordcount = s:get_wordcount(0)
+  if wordcount != s:wordcount_cache || a:force_update
+    let s:wordcount_cache = wordcount
+    let b:airline_wordcount =  s:format_wordcount(wordcount)
   endif
 endfunction
 
+function airline#extensions#wordcount#get()
+  if get(g:, 'airline#visual_active', 0)
+    return s:format_wordcount(s:get_wordcount(1))
+  else
+    if get(b:, 'airline_changedtick', 0) != b:changedtick
+      call s:update_wordcount(0)
+      let b:airline_changedtick = b:changedtick
+    endif
+    return get(b:, 'airline_wordcount', '')
+  endif
+endfunction
+
+" airline functions {{{1
+" default filetypes:
 function! airline#extensions#wordcount#apply(...)
-  if match(&ft, get(g:, 'airline#extensions#wordcount#filetypes')) > -1
-    call airline#extensions#prepend_to_section('z', '%{get(b:, "airline_wordcount", "")}')
+  let filetypes = get(g:, 'airline#extensions#wordcount#filetypes', 
+    \ ['asciidoc', 'help', 'mail', 'markdown', 'nroff', 'org', 'rst', 'plaintex', 'tex', 'text'])
+  " export current filetypes settings to global namespace
+  let g:airline#extensions#wordcount#filetypes = filetypes
+
+  " Check if filetype needs testing
+  if did_filetype()
+    " correctly test for compound filetypes (e.g. markdown.pandoc)
+    let ft = substitute(&filetype, '\.', '\\|', 'g')
+
+    " Select test based on type of "filetypes": new=list, old=string
+    if type(filetypes) == get(v:, 't_list', type([]))
+          \ ? match(filetypes, '\<'. ft. '\>') > -1 || index(filetypes, 'all') > -1
+          \ : match(&filetype, filetypes) > -1
+      let b:airline_changedtick = -1
+      call s:update_wordcount(1) " force update: ensures initial worcount exists
+    elseif exists('b:airline_wordcount') " cleanup when filetype is removed
+      unlet b:airline_wordcount
+    endif
+  endif
+
+  if exists('b:airline_wordcount')
+    call airline#extensions#prepend_to_section(
+          \ 'z', '%{airline#extensions#wordcount#get()}')
   endif
 endfunction
 
 function! airline#extensions#wordcount#init(ext)
   call a:ext.add_statusline_func('airline#extensions#wordcount#apply')
-  autocmd BufReadPost,CursorMoved,CursorMovedI * call s:wordcount_update()
 endfunction

autoload/airline/extensions/wordcount/formatters/default.vim

@@ -1,64 +1,47 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
 
-function! airline#extensions#wordcount#formatters#default#format()
-  let words = string(s:wordcount())
-  if empty(words)
-    return
-  endif
-  let result = g:airline_symbols.space . g:airline_right_alt_sep . g:airline_symbols.space
-  if winwidth(0) >= 80
-    let separator = s:get_decimal_group()
-    if words > 999 && !empty(separator)
+function! airline#extensions#wordcount#formatters#default#update_fmt(...)
+  let s:fmt = get(g:, 'airline#extensions#wordcount#formatter#default#fmt', '%s words')
+  let s:fmt_short = get(g:, 'airline#extensions#wordcount#formatter#default#fmt_short', s:fmt == '%s words' ? '%sW' : s:fmt)
+endfunction
+
+" Reload format when statusline is rebuilt
+call airline#extensions#wordcount#formatters#default#update_fmt()
+
+if index(g:airline_statusline_funcrefs, function('airline#extensions#wordcount#formatters#default#update_fmt')) == -1
+  " only add it, if not already done
+  call airline#add_statusline_funcref(function('airline#extensions#wordcount#formatters#default#update_fmt'))
+endif
+
+if match(get(v:, 'lang', ''), '\v\cC|en') > -1
+  let s:decimal_group = ','
+elseif match(get(v:, 'lang', ''), '\v\cde|dk|fr|pt') > -1
+  let s:decimal_group = '.'
+else
+  let s:decimal_group = ''
+endif
+
+function! airline#extensions#wordcount#formatters#default#to_string(wordcount)
+  if airline#util#winwidth() > 85
+    if a:wordcount > 999
       " Format number according to locale, e.g. German: 1.245 or English: 1,245
-      let words = substitute(words, '\d\@<=\(\(\d\{3\}\)\+\)$', separator.'&', 'g')
-    endif
-    let result = printf("%s%s", words, " words"). result
-  else
-    let result = printf("%s%s", words, "W"). result
-  endif
-  return result
-endfunction
-
-function! s:wordcount()
-  if exists("*wordcount")
-    let l:mode = mode()
-    if l:mode ==# 'v' || l:mode ==# 'V' || l:mode ==# 's' || l:mode ==# 'S'
-      let l:visual_words = wordcount()['visual_words']
-      if l:visual_words != ''
-        return l:visual_words
-      else
-        return 0
-      endif
+      let wordcount = substitute(a:wordcount, '\d\@<=\(\(\d\{3\}\)\+\)$', s:decimal_group.'&', 'g')
     else
-      return wordcount()['words']
+      let wordcount = a:wordcount
     endif
-  elseif mode() =~? 's'
-    return
+    let str = printf(s:fmt, wordcount)
   else
-    let old_status = v:statusmsg
-    let position = getpos(".")
-    exe "silent normal! g\<c-g>"
-    let stat = v:statusmsg
-    call setpos('.', position)
-    let v:statusmsg = old_status
-
-    let parts = split(stat)
-    if len(parts) > 11
-      return str2nr(parts[11])
-    else
-      return
-    endif
+    let str = printf(s:fmt_short, a:wordcount)
   endif
-endfunction
 
-function! s:get_decimal_group()
-  if match(v:lang, '\v\cC|en') > -1
-    return ','
-  elseif match(v:lang, '\v\cde|dk|fr|pt') > -1
-    return '.'
+  let str .= g:airline_symbols.space
+
+  if !empty(g:airline_right_alt_sep)
+    let str .= g:airline_right_alt_sep . g:airline_symbols.space
   endif
-  return ''
+
+  return str
 endfunction

autoload/airline/extensions/wordcount/formatters/readingtime.vim

@@ -0,0 +1,47 @@
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+function! airline#extensions#wordcount#formatters#readingtime#update_fmt(...) abort
+  let s:fmt = get(g:, 'airline#extensions#wordcount#formatter#readingtime#fmt', 'About %s minutes')
+  let s:fmt_short = get(g:, 'airline#extensions#wordcount#formatter#readingtime#fmt_short', s:fmt ==# 'About %s minutes' ? '%sW' : s:fmt)
+endfunction
+
+" Reload format when statusline is rebuilt
+call airline#extensions#wordcount#formatters#readingtime#update_fmt()
+
+if index(g:airline_statusline_funcrefs, function('airline#extensions#wordcount#formatters#readingtime#update_fmt')) == -1
+  " only add it, if not already done
+  call airline#add_statusline_funcref(function('airline#extensions#wordcount#formatters#readingtime#update_fmt'))
+endif
+
+if match(get(v:, 'lang', ''), '\v\cC|en') > -1
+  let s:decimal_group = ','
+elseif match(get(v:, 'lang', ''), '\v\cde|dk|fr|pt') > -1
+  let s:decimal_group = '.'
+else
+  let s:decimal_group = ''
+endif
+
+function! airline#extensions#wordcount#formatters#readingtime#to_string(wordcount) abort
+  if airline#util#winwidth() > 85
+    if a:wordcount > 999
+      " Format number according to locale, e.g. German: 1.245 or English: 1,245
+      let wordcount = substitute(a:wordcount, '\d\@<=\(\(\d\{3\}\)\+\)$', s:decimal_group.'&', 'g')
+    else
+      let wordcount = a:wordcount
+    endif
+    let str = printf(s:fmt, ceil(wordcount / 200.0))
+  else
+    let str = printf(s:fmt_short, ceil(a:wordcount / 200.0))
+  endif
+
+  let str .= g:airline_symbols.space
+
+  if !empty(g:airline_right_alt_sep)
+    let str .= g:airline_right_alt_sep . g:airline_symbols.space
+  endif
+
+  return str
+endfunction

autoload/airline/extensions/xkblayout.vim

@@ -1,4 +1,4 @@
-" MIT License. Copyright (c) 2017 YoungHoon Rhiu.
+" MIT License. Copyright (c) 2017-2020 YoungHoon Rhiu et al.
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -9,8 +9,8 @@ endif
 
 function! airline#extensions#xkblayout#status()
   let keyboard_layout = libcall(g:XkbSwitchLib, 'Xkb_Switch_getXkbLayout', '')
-  let keyboard_layout = split(keyboard_layout, '\.')[-1]
-  let short_codes = {'2SetKorean': 'KR', 'Chinese': 'CN', 'Japanese': 'JP'}
+  let keyboard_layout = get(split(keyboard_layout, '\.'), -1, '')
+  let short_codes = get(g:, 'airline#extensions#xkblayout#short_codes', {'2SetKorean': 'KR', 'Chinese': 'CN', 'Japanese': 'JP'})
 
   if has_key(short_codes, keyboard_layout)
     let keyboard_layout = short_codes[keyboard_layout]
@@ -22,4 +22,3 @@ endfunction
 function! airline#extensions#xkblayout#init(ext)
   call airline#parts#define_function('xkblayout', 'airline#extensions#xkblayout#status')
 endfunction
-

autoload/airline/extensions/ycm.vim

@@ -1,8 +1,13 @@
-" MIT License. Copyright (c) 2015 Evgeny Firsov.
+" MIT License. Copyright (c) 2015-2020 Evgeny Firsov et al.
+" Plugin: https://github.com/ycm-core/YouCompleteMe
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
 
+if !get(g:, 'loaded_youcompleteme', 0)
+  finish
+endif
+
 let s:spc = g:airline_symbols.space
 let s:error_symbol = get(g:, 'airline#extensions#ycm#error_symbol', 'E:')
 let s:warning_symbol = get(g:, 'airline#extensions#ycm#warning_symbol', 'W:')
@@ -12,8 +17,8 @@ function! airline#extensions#ycm#init(ext)
   call airline#parts#define_function('ycm_warning_count', 'airline#extensions#ycm#get_warning_count')
 endfunction
 
-function! airline#extensions#ycm#get_error_count()
-  if exists(':YcmDiag') && exists("*youcompleteme#GetErrorCount")
+function! airline#extensions#ycm#get_error_count() abort
+  if exists("*youcompleteme#GetErrorCount")
     let cnt = youcompleteme#GetErrorCount()
 
     if cnt != 0
@@ -25,7 +30,7 @@ function! airline#extensions#ycm#get_error_count()
 endfunction
 
 function! airline#extensions#ycm#get_warning_count()
-  if exists(':YcmDiag') && exists("*youcompleteme#GetWarningCount")
+  if exists("*youcompleteme#GetWarningCount")
     let cnt = youcompleteme#GetWarningCount()
 
     if cnt != 0
@@ -35,4 +40,3 @@ function! airline#extensions#ycm#get_warning_count()
 
   return ''
 endfunction
-

autoload/airline/extensions/zoomwintab.vim

@@ -0,0 +1,27 @@
+" MIT License. Copyright (c) 2020 Dmitry Geurkov (d.geurkov@gmail.com)
+" Plugin: https://github.com/troydm/zoomwintab.vim
+" vim: et ts=2 sts=2 sw=2
+
+scriptencoding utf-8
+
+
+" Avoid installing twice
+if exists('g:loaded_vim_airline_zoomwintab')
+  finish
+endif
+
+let g:loaded_vim_airline_zoomwintab = 1
+
+let s:zoomwintab_status_zoomed_in =
+  \ get(g:, 'airline#extensions#zoomwintab#status_zoomed_in', g:airline_left_alt_sep.' Zoomed')
+let s:zoomwintab_status_zoomed_out =
+  \ get(g:, 'airline#extensions#zoomwintab#status_zoomed_out', '')
+
+function! airline#extensions#zoomwintab#apply(...) abort
+  call airline#extensions#prepend_to_section('gutter',
+    \ exists('t:zoomwintab') ? s:zoomwintab_status_zoomed_in : s:zoomwintab_status_zoomed_out)
+endfunction
+
+function! airline#extensions#zoomwintab#init(ext) abort
+  call a:ext.add_statusline_func('airline#extensions#zoomwintab#apply')
+endfunction

autoload/airline/formatter/short_path.vim

@@ -0,0 +1,8 @@
+scriptencoding utf-8
+
+function! airline#formatter#short_path#format(val) abort
+  if get(g:, 'airline_stl_path_style', 'default') ==# 'short'
+    return '%{pathshorten(expand("'.a:val.'"))}'
+  endif
+  return a:val
+endfunction

autoload/airline/highlighter.vim

@@ -1,237 +1,629 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
-" vim: et ts=2 sts=2 sw=2
+" MIT License. Copyright (c) 2013-2020 Bailey Ling Christian Brabandt et al.
+" vim: et ts=2 sts=2 sw=2 fdm=marker et
 
 scriptencoding utf-8
 
 let s:is_win32term = (has('win32') || has('win64')) &&
                    \ !has('gui_running') &&
                    \ (empty($CONEMUBUILD) || &term !=? 'xterm') &&
+                   \ empty($WTSESSION) &&
                    \ !(exists("+termguicolors") && &termguicolors)
 
 let s:separators = {}
 let s:accents = {}
+let s:hl_groups = {}
 
-function! s:gui2cui(rgb, fallback)
-  if a:rgb == ''
-    return a:fallback
-  elseif match(a:rgb, '^\%(NONE\|[fb]g\)$') > -1
-    return a:rgb
-  endif
-  let rgb = map(split(a:rgb[1:], '..\zs'), '0 + ("0x".v:val)')
-  return airline#msdos#round_msdos_colors(rgb)
-endfunction
-
-function! s:get_syn(group, what)
-  if !exists("g:airline_gui_mode")
-    let g:airline_gui_mode = airline#init#gui_mode()
-  endif
-  let color = ''
-  if hlexists(a:group)
-    let color = synIDattr(synIDtrans(hlID(a:group)), a:what, g:airline_gui_mode)
-  endif
-  if empty(color) || color == -1
-    " should always exists
-    let color = synIDattr(synIDtrans(hlID('Normal')), a:what, g:airline_gui_mode)
-    " however, just in case
-    if empty(color) || color == -1
-      let color = 'NONE'
+if !exists(":def") || (exists(":def") && get(g:, "airline_experimental", 0)==0)
+  " Legacy VimScript implementation {{{1
+  function! s:gui2cui(rgb, fallback) abort " {{{2
+    if a:rgb == ''
+      return a:fallback
+    elseif match(a:rgb, '^\%(NONE\|[fb]g\)$') > -1
+      return a:rgb
     endif
-  endif
-  return color
-endfunction
+    let rgb = map(split(a:rgb[1:], '..\zs'), '0 + ("0x".v:val)')
+    return airline#msdos#round_msdos_colors(rgb)
+  endfunction
+  function! s:group_not_done(list, name) abort " {{{2
+    if index(a:list, a:name) == -1
+      call add(a:list, a:name)
+      return 1
+    else
+      if &vbs
+        echomsg printf("airline: group: %s already done, skipping", a:name)
+      endif
+      return 0
+    endif
+  endfu
+  function! s:get_syn(group, what, mode) abort "{{{2
+    let color = ''
+    if hlexists(a:group)
+      let color = synIDattr(synIDtrans(hlID(a:group)), a:what, a:mode)
+    endif
+    if empty(color) || color == -1
+      " should always exist
+      let color = synIDattr(synIDtrans(hlID('Normal')), a:what, a:mode)
+      " however, just in case
+      if empty(color) || color == -1
+        let color = 'NONE'
+      endif
+    endif
+    return color
+  endfunction
+  function! s:get_array(guifg, guibg, ctermfg, ctermbg, opts) abort " {{{2
+    return [ a:guifg, a:guibg, a:ctermfg, a:ctermbg, empty(a:opts) ? '' : join(a:opts, ',') ]
+  endfunction
+  function! airline#highlighter#reset_hlcache() abort " {{{2
+    let s:hl_groups = {}
+  endfunction
+  function! airline#highlighter#get_highlight(group, ...) abort " {{{2
+    " only check for the cterm reverse attribute
+    " TODO: do we need to check all modes (gui, term, as well)?
+    let reverse = synIDattr(synIDtrans(hlID(a:group)), 'reverse', 'cterm')
+    if get(g:, 'airline_highlighting_cache', 0) && has_key(s:hl_groups, a:group)
+      let res = s:hl_groups[a:group]
+      return reverse ? [ res[1], res[0], res[3], res[2], res[4] ] : res
+    else
+      let ctermfg = s:get_syn(a:group, 'fg', 'cterm')
+      let ctermbg = s:get_syn(a:group, 'bg', 'cterm')
+      let guifg = s:get_syn(a:group, 'fg', 'gui')
+      let guibg = s:get_syn(a:group, 'bg', 'gui')
+      let bold = synIDattr(synIDtrans(hlID(a:group)), 'bold')
+      if reverse
+        let res = s:get_array(guibg, guifg, ctermbg, ctermfg, bold ? ['bold'] : a:000)
+      else
+        let res = s:get_array(guifg, guibg, ctermfg, ctermbg, bold ? ['bold'] : a:000)
+      endif
+    endif
+    let s:hl_groups[a:group] = res
+    return res
+  endfunction
+  function! airline#highlighter#get_highlight2(fg, bg, ...) abort " {{{2
+    let guifg = s:get_syn(a:fg[0], a:fg[1], 'gui')
+    let guibg = s:get_syn(a:bg[0], a:bg[1], 'gui')
+    let ctermfg = s:get_syn(a:fg[0], a:fg[1], 'cterm')
+    let ctermbg = s:get_syn(a:bg[0], a:bg[1], 'cterm')
+    return s:get_array(guifg, guibg, ctermfg, ctermbg, a:000)
+  endfunction
+  function! s:hl_group_exists(group) abort " {{{2
+    if !hlexists(a:group)
+      return 0
+    elseif empty(synIDattr(synIDtrans(hlID(a:group)), 'fg'))
+      return 0
+    endif
+    return 1
+  endfunction
+  function! airline#highlighter#exec(group, colors) abort " {{{2
+    if pumvisible()
+      return
+    endif
+    let colors = a:colors
+    if s:is_win32term
+      let colors[2] = s:gui2cui(get(colors, 0, ''), get(colors, 2, ''))
+      let colors[3] = s:gui2cui(get(colors, 1, ''), get(colors, 3, ''))
+    endif
+    let old_hi = airline#highlighter#get_highlight(a:group)
+    if len(colors) == 4
+      call add(colors, '')
+    endif
+    let new_hi = [colors[0], colors[1], printf('%s', colors[2]), printf('%s', colors[3]), colors[4]]
+    let colors = s:CheckDefined(colors)
+    if old_hi != new_hi || !s:hl_group_exists(a:group)
+      let cmd = printf('hi %s%s', a:group, s:GetHiCmd(colors))
+      try
+        exe cmd
+      catch
+        echoerr "Error when running command: ". cmd
+      endtry
+      if has_key(s:hl_groups, a:group)
+        let s:hl_groups[a:group] = colors
+      endif
+    endif
+  endfunction
+  function! s:CheckDefined(colors) abort " {{{2
+    " Checks, whether the definition of the colors is valid and is not empty or NONE
+    " e.g. if the colors would expand to this:
+    " hi airline_c ctermfg=NONE ctermbg=NONE
+    " that means to clear that highlighting group, therefore, fallback to Normal
+    " highlighting group for the cterm values
 
-function! s:get_array(fg, bg, opts)
-  return g:airline_gui_mode ==# 'gui'
-        \ ? [ a:fg, a:bg, '', '', join(a:opts, ',') ]
-        \ : [ '', '', a:fg, a:bg, join(a:opts, ',') ]
-endfunction
-
-function! airline#highlighter#get_highlight(group, ...)
-  let fg = s:get_syn(a:group, 'fg')
-  let bg = s:get_syn(a:group, 'bg')
-  let reverse = g:airline_gui_mode ==# 'gui'
-        \ ? synIDattr(synIDtrans(hlID(a:group)), 'reverse', 'gui')
-        \ : synIDattr(synIDtrans(hlID(a:group)), 'reverse', 'cterm')
-        \|| synIDattr(synIDtrans(hlID(a:group)), 'reverse', 'term')
-  return reverse ? s:get_array(bg, fg, a:000) : s:get_array(fg, bg, a:000)
-endfunction
-
-function! airline#highlighter#get_highlight2(fg, bg, ...)
-  let fg = s:get_syn(a:fg[0], a:fg[1])
-  let bg = s:get_syn(a:bg[0], a:bg[1])
-  return s:get_array(fg, bg, a:000)
-endfunction
-
-function! s:hl_group_exists(group)
-  if !hlexists(a:group)
-    return 0
-  elseif empty(synIDattr(hlID(a:group), 'fg'))
-    return 0
-  endif
-  return 1
-endfunction
-
-function! airline#highlighter#exec(group, colors)
-  if pumvisible()
-    return
-  endif
-  let colors = a:colors
-  if s:is_win32term
-    let colors[2] = s:gui2cui(get(colors, 0, ''), get(colors, 2, ''))
-    let colors[3] = s:gui2cui(get(colors, 1, ''), get(colors, 3, ''))
-  endif
-  let old_hi = airline#highlighter#get_highlight(a:group)
-  if len(colors) == 4
-    call add(colors, '')
-  endif
-  let colors = s:CheckDefined(colors)
-  if old_hi != colors || !s:hl_group_exists(a:group)
-    let cmd = printf('hi %s %s %s %s %s %s %s %s',
-        \ a:group, s:Get(colors, 0, 'guifg=', ''), s:Get(colors, 1, 'guibg=', ''),
-        \ s:Get(colors, 2, 'ctermfg=', ''), s:Get(colors, 3, 'ctermbg=', ''),
-        \ s:Get(colors, 4, 'gui=', ''), s:Get(colors, 4, 'cterm=', ''),
-        \ s:Get(colors, 4, 'term=', ''))
-    exe cmd
-  endif
-endfunction
-
-function! s:CheckDefined(colors)
-  " Checks, whether the definition of the colors is valid and is not empty or NONE
-  " e.g. if the colors would expand to this:
-  " hi airline_c ctermfg=NONE ctermbg=NONE
-  " that means to clear that highlighting group, therefore, fallback to Normal
-  " highlighting group for the cterm values
-
-  " This only works, if the Normal highlighting group is actually defined, so
-  " return early, if it has been cleared
-  if !exists("g:airline#highlighter#normal_fg_hi")
-    let g:airline#highlighter#normal_fg_hi = synIDattr(synIDtrans(hlID('Normal')), 'fg', 'cterm')
-  endif
-  if empty(g:airline#highlighter#normal_fg_hi) || g:airline#highlighter#normal_fg_hi < 0
-    return a:colors
-  endif
-
-  for val in a:colors
-    if !empty(val) && val !=# 'NONE'
+    " This only works, if the Normal highlighting group is actually defined, so
+    " return early, if it has been cleared
+    if !exists("g:airline#highlighter#normal_fg_hi")
+      let g:airline#highlighter#normal_fg_hi = synIDattr(synIDtrans(hlID('Normal')), 'fg', 'cterm')
+    endif
+    if empty(g:airline#highlighter#normal_fg_hi) || g:airline#highlighter#normal_fg_hi < 0
       return a:colors
     endif
-  endfor
-  " this adds the bold attribute to the term argument of the :hi command,
-  " but at least this makes sure, the group will be defined
-  let fg = g:airline#highlighter#normal_fg_hi
-  let bg = synIDattr(synIDtrans(hlID('Normal')), 'bg', 'cterm')
-  if bg < 0
-    " in case there is no background color defined for Normal
-    let bg = a:colors[3]
-  endif
-  return a:colors[0:1] + [fg, bg] + [a:colors[4]]
-endfunction
 
-function! s:Get(dict, key, prefix, default)
-  if get(a:dict, a:key, a:default) isnot# a:default
-    return a:prefix. get(a:dict, a:key)
-  else
-    return ''
-  endif
-endfunction
+    for val in a:colors
+      if !empty(val) && val !=# 'NONE'
+        return a:colors
+      endif
+    endfor
+    " this adds the bold attribute to the term argument of the :hi command,
+    " but at least this makes sure, the group will be defined
+    let fg = g:airline#highlighter#normal_fg_hi
+    let bg = synIDattr(synIDtrans(hlID('Normal')), 'bg', 'cterm')
+    if bg < 0
+      " in case there is no background color defined for Normal
+      let bg = a:colors[3]
+    endif
+    return a:colors[0:1] + [fg, bg] + [a:colors[4]]
+  endfunction
+  function! s:GetHiCmd(list) abort " {{{2
+    " a:list needs to have 5 items!
+    let res = ''
+    let i = -1
+    while i < 4
+      let i += 1
+      let item = get(a:list, i, '')
+      if item is ''
+        continue
+      endif
+      if i == 0
+        let res .= ' guifg='.item
+      elseif i == 1
+        let res .= ' guibg='.item
+      elseif i == 2
+        let res .= ' ctermfg='.item
+      elseif i == 3
+        let res .= ' ctermbg='.item
+      elseif i == 4
+        let res .= printf(' gui=%s cterm=%s term=%s', item, item, item)
+      endif
+    endwhile
+    return res
+  endfunction
+  function! s:exec_separator(dict, from, to, inverse, suffix) abort " {{{2
+    if pumvisible()
+      return
+    endif
+    let group = a:from.'_to_'.a:to.a:suffix
+    let from = airline#themes#get_highlight(a:from.a:suffix)
+    let to = airline#themes#get_highlight(a:to.a:suffix)
+    if a:inverse
+      let colors = [ from[1], to[1], from[3], to[3] ]
+    else
+      let colors = [ to[1], from[1], to[3], from[3] ]
+    endif
+    let a:dict[group] = colors
+    call airline#highlighter#exec(group, colors)
+  endfunction
+  function! airline#highlighter#load_theme() abort " {{{2
+    if pumvisible()
+      return
+    endif
+    for winnr in filter(range(1, winnr('$')), 'v:val != winnr()')
+      call airline#highlighter#highlight_modified_inactive(winbufnr(winnr))
+    endfor
+    call airline#highlighter#highlight(['inactive'])
+    if getbufvar( bufnr('%'), '&modified'  )
+      call airline#highlighter#highlight(['normal', 'modified'])
+    else
+      call airline#highlighter#highlight(['normal'])
+    endif
+  endfunction
+  function! airline#highlighter#add_separator(from, to, inverse) abort " {{{2
+    let s:separators[a:from.a:to] = [a:from, a:to, a:inverse]
+    call <sid>exec_separator({}, a:from, a:to, a:inverse, '')
+  endfunction
+  function! airline#highlighter#add_accent(accent) abort " {{{2
+    let s:accents[a:accent] = 1
+  endfunction
+  function! airline#highlighter#highlight_modified_inactive(bufnr) abort " {{{2
+    if getbufvar(a:bufnr, '&modified')
+      let colors = exists('g:airline#themes#{g:airline_theme}#palette.inactive_modified.airline_c')
+            \ ? g:airline#themes#{g:airline_theme}#palette.inactive_modified.airline_c : []
+    else
+      let colors = exists('g:airline#themes#{g:airline_theme}#palette.inactive.airline_c')
+            \ ? g:airline#themes#{g:airline_theme}#palette.inactive.airline_c : []
+    endif
 
-function! s:exec_separator(dict, from, to, inverse, suffix)
-  if pumvisible()
-    return
-  endif
-  let l:from = airline#themes#get_highlight(a:from.a:suffix)
-  let l:to = airline#themes#get_highlight(a:to.a:suffix)
-  let group = a:from.'_to_'.a:to.a:suffix
-  if a:inverse
-    let colors = [ l:from[1], l:to[1], l:from[3], l:to[3] ]
-  else
-    let colors = [ l:to[1], l:from[1], l:to[3], l:from[3] ]
-  endif
-  let a:dict[group] = colors
-  call airline#highlighter#exec(group, colors)
-endfunction
+    if !empty(colors)
+      call airline#highlighter#exec('airline_c'.(a:bufnr).'_inactive', colors)
+    endif
+  endfunction
+  function! airline#highlighter#highlight(modes, ...) abort " {{{2
+    let bufnr = a:0 ? a:1 : ''
+    let p = g:airline#themes#{g:airline_theme}#palette
 
-function! airline#highlighter#load_theme()
-  if pumvisible()
-    return
-  endif
-  for winnr in filter(range(1, winnr('$')), 'v:val != winnr()')
-    call airline#highlighter#highlight_modified_inactive(winbufnr(winnr))
-  endfor
-  call airline#highlighter#highlight(['inactive'])
-  if getbufvar( bufnr('%'), '&modified'  )
-    call airline#highlighter#highlight(['normal', 'modified'])
-  else
-    call airline#highlighter#highlight(['normal'])
-  endif
-endfunction
-
-function! airline#highlighter#add_separator(from, to, inverse)
-  let s:separators[a:from.a:to] = [a:from, a:to, a:inverse]
-  call <sid>exec_separator({}, a:from, a:to, a:inverse, '')
-endfunction
-
-function! airline#highlighter#add_accent(accent)
-  let s:accents[a:accent] = 1
-endfunction
-
-function! airline#highlighter#highlight_modified_inactive(bufnr)
-  if getbufvar(a:bufnr, '&modified')
-    let colors = exists('g:airline#themes#{g:airline_theme}#palette.inactive_modified.airline_c')
-          \ ? g:airline#themes#{g:airline_theme}#palette.inactive_modified.airline_c : []
-  else
-    let colors = exists('g:airline#themes#{g:airline_theme}#palette.inactive.airline_c')
-          \ ? g:airline#themes#{g:airline_theme}#palette.inactive.airline_c : []
-  endif
-
-  if !empty(colors)
-    call airline#highlighter#exec('airline_c'.(a:bufnr).'_inactive', colors)
-  endif
-endfunction
-
-function! airline#highlighter#highlight(modes, ...)
-  let bufnr = a:0 ? a:1 : ''
-  let p = g:airline#themes#{g:airline_theme}#palette
-
-  " draw the base mode, followed by any overrides
-  let mapped = map(a:modes, 'v:val == a:modes[0] ? v:val : a:modes[0]."_".v:val')
-  let suffix = a:modes[0] == 'inactive' ? '_inactive' : ''
-  for mode in mapped
-    if exists('g:airline#themes#{g:airline_theme}#palette[mode]')
-      let dict = g:airline#themes#{g:airline_theme}#palette[mode]
-      for kvp in items(dict)
-        let mode_colors = kvp[1]
-        let name = kvp[0]
-        if name is# 'airline_c' && !empty(bufnr) && suffix is# '_inactive'
-          let name = 'airline_c'.bufnr
-        endif
-        call airline#highlighter#exec(name.suffix, mode_colors)
-
-        for accent in keys(s:accents)
-          if !has_key(p.accents, accent)
+    " draw the base mode, followed by any overrides
+    let mapped = map(a:modes, 'v:val == a:modes[0] ? v:val : a:modes[0]."_".v:val')
+    let suffix = a:modes[0] == 'inactive' ? '_inactive' : ''
+    let airline_grouplist = []
+    let buffers_in_tabpage = sort(tabpagebuflist())
+    if exists("*uniq")
+      let buffers_in_tabpage = uniq(buffers_in_tabpage)
+    endif
+    " mapped might be something like ['normal', 'normal_modified']
+    " if a group is in both modes available, only define the second
+    " that is how this was done previously overwrite the previous definition
+    for mode in reverse(mapped)
+      if exists('g:airline#themes#{g:airline_theme}#palette[mode]')
+        let dict = g:airline#themes#{g:airline_theme}#palette[mode]
+        for kvp in items(dict)
+          let mode_colors = kvp[1]
+          let name = kvp[0]
+          if name is# 'airline_c' && !empty(bufnr) && suffix is# '_inactive'
+            let name = 'airline_c'.bufnr
+          endif
+          " do not re-create highlighting for buffers that are no longer visible
+          " in the current tabpage
+          if name =~# 'airline_c\d\+'
+            let bnr = matchstr(name, 'airline_c\zs\d\+') + 0
+            if bnr > 0 && index(buffers_in_tabpage, bnr) == -1
+              continue
+            endif
+          elseif (name =~# '_to_') || (name[0:10] is# 'airline_tab' && !empty(suffix))
+            " group will be redefined below at exec_separator
+            " or is not needed for tabline with '_inactive' suffix
+            " since active flag is 1 for builder)
             continue
           endif
-          let colors = copy(mode_colors)
-          if p.accents[accent][0] != ''
-            let colors[0] = p.accents[accent][0]
+          if s:group_not_done(airline_grouplist, name.suffix)
+            call airline#highlighter#exec(name.suffix, mode_colors)
           endif
-          if p.accents[accent][2] != ''
-            let colors[2] = p.accents[accent][2]
+
+          if !has_key(p, 'accents')
+            " work around a broken installation
+            " shouldn't actually happen, p should always contain accents
+            continue
           endif
-          if len(colors) >= 5
-            let colors[4] = get(p.accents[accent], 4, '')
-          else
-            call add(colors, get(p.accents[accent], 4, ''))
-          endif
-          call airline#highlighter#exec(name.suffix.'_'.accent, colors)
+
+          for accent in keys(s:accents)
+            if !has_key(p.accents, accent)
+              continue
+            endif
+            let colors = copy(mode_colors)
+            if p.accents[accent][0] != ''
+              let colors[0] = p.accents[accent][0]
+            endif
+            if p.accents[accent][2] != ''
+              let colors[2] = p.accents[accent][2]
+            endif
+            if len(colors) >= 5
+              let colors[4] = get(p.accents[accent], 4, '')
+            else
+              call add(colors, get(p.accents[accent], 4, ''))
+            endif
+            if s:group_not_done(airline_grouplist, name.suffix.'_'.accent)
+              call airline#highlighter#exec(name.suffix.'_'.accent, colors)
+            endif
+          endfor
         endfor
-      endfor
 
-      " TODO: optimize this
-      for sep in items(s:separators)
-        call <sid>exec_separator(dict, sep[1][0], sep[1][1], sep[1][2], suffix)
-      endfor
+        if empty(s:separators)
+          " nothing to be done
+          continue
+        endif
+        " TODO: optimize this
+        for sep in items(s:separators)
+          " we cannot check, that the group already exists, else the separators
+          " might not be correctly defined. But perhaps we can skip above groups
+          " that match the '_to_' name, because they would be redefined here...
+          call <sid>exec_separator(dict, sep[1][0], sep[1][1], sep[1][2], suffix)
+        endfor
+      endif
+    endfor
+  endfunction
+
+  finish
+else
+  " This is using Vim9 script " {{{1
+  def s:gui2cui(rgb: string, fallback: string): string # {{{2
+    if empty(rgb)
+      return fallback
+    elseif match(rgb, '^\%(NONE\|[fb]g\)$') > -1
+      return rgb
     endif
-  endfor
-endfunction
+    var _rgb = []
+    _rgb = map(split(rgb[1:], '..\zs'), {_, v -> ("0x" .. v)->str2nr(16)})
+    return airline#msdos#round_msdos_colors(_rgb)
+  enddef
+  def s:group_not_done(list: list<string>, name: string): bool # {{{2
+    if index(list, name) == -1
+      add(list, name)
+      return true
+    else
+      if &vbs
+        :echomsg printf("airline: group: %s already done, skipping", name)
+      endif
+      return false
+    endif
+  enddef
+  def s:get_syn(group: string, what: string, mode: string): string # {{{2
+    var color = ''
+    if hlexists(group)
+      color = hlID(group)->synIDtrans()->synIDattr(what, mode)
+    endif
+    if empty(color) || str2nr(color) == -1
+      # Normal highlighting group should always exist
+      color = hlID('Normal')->synIDtrans()->synIDattr(what, mode)
+      # however, just in case
+      if empty(color) || str2nr(color) == -1
+        color = 'NONE'
+      endif
+    endif
+    return color
+  enddef
+  def s:get_array(guifg: string, guibg: string, ctermfg: string, ctermbg: string, opts: list<string>): list<string> # {{{2
+    return [ guifg, guibg, ctermfg, ctermbg, empty(opts) ? '' : join(opts, ',') ]
+  enddef
+  def airline#highlighter#reset_hlcache(): void # {{{2
+    s:hl_groups = {}
+  enddef
+  def airline#highlighter#get_highlight(group: string, rest: list<string> = ['']): list<string> # {{{2
+    # only check for the cterm reverse attribute
+    # TODO: do we need to check all modes (gui, term, as well)?
+    var reverse = false
+    var res = []
+    var ctermfg: string
+    var ctermbg: string
+    var guifg: string
+    var guibg: string
+    var bold: bool
+    if hlID(group)->synIDtrans()->synIDattr('reverse', 'cterm')->str2nr()
+      reverse = true
+    endif
+    if get(g:, 'airline_highlighting_cache', 0) && has_key(s:hl_groups, group)
+      res = s:hl_groups[group]
+      return reverse ? [ res[1], res[0], res[3], res[2], res[4] ] : res
+    else
+      ctermfg = s:get_syn(group, 'fg', 'cterm')
+      ctermbg = s:get_syn(group, 'bg', 'cterm')
+      guifg = s:get_syn(group, 'fg', 'gui')
+      guibg = s:get_syn(group, 'bg', 'gui')
+      if hlID(group)->synIDtrans()->synIDattr('bold')->str2nr()
+        bold = true
+      endif
+      if reverse
+        res = s:get_array(guibg, guifg, ctermbg, ctermfg, bold ? ['bold'] : rest)
+      else
+        res = s:get_array(guifg, guibg, ctermfg, ctermbg, bold ? ['bold'] : rest)
+      endif
+    endif
+    s:hl_groups[group] = res
+    return res
+  enddef
+  def airline#highlighter#get_highlight2(fg: list<string>, bg: list<string>, rest1: string = '', rest2: string = '', rest3: string = ''): list<string> # {{{2
+    var guifg = s:get_syn(fg[0], fg[1], 'gui')
+    var guibg = s:get_syn(bg[0], bg[1], 'gui')
+    var ctermfg = s:get_syn(fg[0], fg[1], 'cterm')
+    var ctermbg = s:get_syn(bg[0], bg[1], 'cterm')
+    var rest = [ rest1, rest2, rest3 ]
+    return s:get_array(guifg, guibg, ctermfg, ctermbg, filter(rest, {_, v -> !empty(v)}))
+  enddef
+  def s:hl_group_exists(group: string): bool # {{{2
+    if !hlexists(group)
+      return false
+    elseif hlID(group)->synIDtrans()->synIDattr('fg')->empty()
+      return false
+    endif
+    return true
+  enddef
+  def s:CheckDefined(colors: list<any>): list<any> # {{{2
+    # Checks, whether the definition of the colors is valid and is not empty or NONE
+    # e.g. if the colors would expand to this:
+    # hi airline_c ctermfg=NONE ctermbg=NONE
+    # that means to clear that highlighting group, therefore, fallback to Normal
+    # highlighting group for the cterm values
 
+    # This only works, if the Normal highlighting group is actually defined,
+    # so return early, if it has been cleared
+    if !exists("g:airline#highlighter#normal_fg_hi")
+      g:airline#highlighter#normal_fg_hi = hlID('Normal')->synIDtrans()->synIDattr('fg', 'cterm')
+    endif
+    if empty(g:airline#highlighter#normal_fg_hi) || str2nr(g:airline#highlighter#normal_fg_hi) < 0
+      return colors
+    endif
+
+    for val in colors
+      if !empty(val) && val !=# 'NONE'
+        return colors
+      endif
+    endfor
+    # this adds the bold attribute to the term argument of the :hi command,
+    # but at least this makes sure, the group will be defined
+    var fg = g:airline#highlighter#normal_fg_hi
+    var bg = hlID('Normal')->synIDtrans()->synIDattr('bg', 'cterm')
+    if str2nr(bg) < 0
+      # in case there is no background color defined for Normal
+      bg = colors[3]
+    endif
+    return colors[0:1] + [fg, bg] + [colors[4]]
+  enddef
+  def s:GetHiCmd(list: list<string>): string # {{{2
+    # list needs to have 5 items!
+    var res: string
+    var i = -1
+    var item: string
+    while i < 4
+      i += 1
+      item = get(list, i, '')
+      if item is ''
+        continue
+      endif
+      if i == 0
+        res = res .. ' guifg=' .. item
+      elseif i == 1
+        res = res .. ' guibg=' .. item
+      elseif i == 2
+        res = res .. ' ctermfg=' .. item
+      elseif i == 3
+        res = res .. ' ctermbg=' .. item
+      elseif i == 4
+        res = res .. printf(' gui=%s cterm=%s term=%s', item, item, item)
+      endif
+    endwhile
+    return res
+  enddef
+  def airline#highlighter#exec(group: string, clrs: list<any>): void # {{{2
+    # TODO: is clrs: list<any> correct? Should probably be list<number> instead
+    #       convert all themes to use strings in cterm color definition
+    if pumvisible()
+      return
+    endif
+    var colors: list<string>
+    colors = map(copy(clrs), { _, v -> type(v) != type('') ? string(v) : v})
+    if len(colors) == 4
+      add(colors, '')
+    endif
+    if s:is_win32term
+      colors[2] = s:gui2cui(get(colors, 0, ''), get(colors, 2, ''))
+      colors[3] = s:gui2cui(get(colors, 1, ''), get(colors, 3, ''))
+    endif
+    var old_hi: list<string> = airline#highlighter#get_highlight(group)
+    var new_hi: list<string> = colors
+    colors = s:CheckDefined(colors)
+    if old_hi != new_hi || !s:hl_group_exists(group)
+      var cmd = ''
+      cmd = printf('hi %s%s', group, s:GetHiCmd(colors))
+      :exe cmd
+      if has_key(s:hl_groups, group)
+        s:hl_groups[group] = colors
+      endif
+    endif
+  enddef
+  def s:exec_separator(dict: dict<any>, from_arg: string, to_arg: string, inverse: bool, suffix: string): void # {{{2
+    if pumvisible()
+      return
+    endif
+    var group = from_arg .. '_to_' .. to_arg .. suffix
+    var from = map(airline#themes#get_highlight(from_arg .. suffix),
+      {_, v -> type(v) != type('') ? string(v) : v})
+    var colors = []
+    var to = map(airline#themes#get_highlight(to_arg .. suffix),
+      {_, v -> type(v) != type('') ? string(v) : v})
+    if inverse
+      colors = [ from[1], to[1], from[3], to[3] ]
+    else
+      colors = [ to[1], from[1], to[3], from[3] ]
+    endif
+    dict[group] = colors
+    airline#highlighter#exec(group, colors)
+  enddef
+  def airline#highlighter#load_theme(): void # {{{2
+    if pumvisible()
+      return
+    endif
+    for winnr in filter(range(1, winnr('$')), {_, v -> v != winnr()})
+      airline#highlighter#highlight_modified_inactive(winbufnr(winnr))
+    endfor
+    airline#highlighter#highlight(['inactive'])
+    if getbufvar( bufnr('%'), '&modified'  )
+      airline#highlighter#highlight(['normal', 'modified'])
+    else
+      airline#highlighter#highlight(['normal'])
+    endif
+  enddef
+  def airline#highlighter#add_separator(from: string, to: string, inverse: bool): void # {{{2
+    s:separators[from .. to] = [from, to, inverse]
+    s:exec_separator({}, from, to, inverse, '')
+  enddef
+  def airline#highlighter#add_accent(accent: string): void # {{{2
+    s:accents[accent] = 1
+  enddef
+  def airline#highlighter#highlight_modified_inactive(bufnr: number): void # {{{2
+    var colors: list<any>
+    var dict1  = eval('g:airline#themes#' .. g:airline_theme .. '#palette')->get('inactive_modified', {})
+    var dict2  = eval('g:airline#themes#' .. g:airline_theme .. '#palette')->get('inactive', {})
+
+    if empty(dict2)
+      return
+    endif
+
+    if getbufvar(bufnr, '&modified')
+      colors = get(dict1, 'airline_c', [])
+    else
+      colors = get(dict2, 'airline_c', [])
+    endif
+    if !empty(colors)
+      airline#highlighter#exec('airline_c' .. bufnr .. '_inactive', colors)
+    endif
+  enddef
+  def airline#highlighter#highlight(modes: list<string>, bufnr: string = ''): void # {{{2
+    var p: dict<any> = eval('g:airline#themes#' .. g:airline_theme .. '#palette')
+
+    # draw the base mode, followed by any overrides
+    var mapped = map(modes, {_, v -> v == modes[0] ? v : modes[0] .. "_" .. v})
+    var suffix = ''
+    if modes[0] == 'inactive'
+      suffix = '_inactive'
+    endif
+    var airline_grouplist = []
+    var dict: dict<any>
+    var bnr: number = 0
+
+    var buffers_in_tabpage: list<number> = uniq(sort(tabpagebuflist()))
+    # mapped might be something like ['normal', 'normal_modified']
+    # if a group is in both modes available, only define the second
+    # that is how this was done previously overwrite the previous definition
+    for mode in reverse(mapped)
+      if exists('g:airline#themes#' .. g:airline_theme .. '#palette.' .. mode)
+        dict = eval('g:airline#themes#' .. g:airline_theme .. '#palette.' .. mode)
+        for kvp in items(dict)
+          var mode_colors = kvp[1]
+          var name = kvp[0]
+          if name == 'airline_c' && !empty(bufnr) && suffix == '_inactive'
+            name = 'airline_c' .. bufnr
+          endif
+          # do not re-create highlighting for buffers that are no longer visible
+          # in the current tabpage
+          if name =~# 'airline_c\d\+'
+            bnr = str2nr(matchstr(name, 'airline_c\zs\d\+'))
+            if bnr > 0 && index(buffers_in_tabpage, bnr) == -1
+              continue
+            endif
+          elseif (name =~ '_to_') || (name[0:10] == 'airline_tab' && !empty(suffix))
+            # group will be redefined below at exec_separator
+            # or is not needed for tabline with '_inactive' suffix
+            # since active flag is 1 for builder)
+            continue
+          endif
+          if s:group_not_done(airline_grouplist, name .. suffix)
+            airline#highlighter#exec(name .. suffix, mode_colors)
+          endif
+
+          if !has_key(p, 'accents')
+            # shouldn't actually happen, p should always contain accents
+            continue
+          endif
+
+          for accent in keys(s:accents)
+            if !has_key(p.accents, accent)
+              continue
+            endif
+            var colors = copy(mode_colors)
+            if p.accents[accent][0] != ''
+                colors[0] = p.accents[accent][0]
+            endif
+            if type(get(p.accents[accent], 2, '')) == type('')
+              colors[2] = get(p.accents[accent], 2, '')
+            else
+              colors[2] = string(p.accents[accent][2])
+            endif
+            if len(colors) >= 5
+              colors[4] = get(p.accents[accent], 4, '')
+            else
+              add(colors, get(p.accents[accent], 4, ''))
+            endif
+            if s:group_not_done(airline_grouplist, name .. suffix .. '_' .. accent)
+              airline#highlighter#exec(name .. suffix .. '_' .. accent, colors)
+            endif
+          endfor
+        endfor
+
+        if empty(s:separators)
+          continue
+        endif
+        for sep in items(s:separators)
+          # we cannot check, that the group already exists, else the separators
+          # might not be correctly defined. But perhaps we can skip above groups
+          # that match the '_to_' name, because they would be redefined here...
+          s:exec_separator(dict, sep[1][0], sep[1][1], sep[1][2], suffix)
+        endfor
+      endif
+    endfor
+  enddef
+endif " }}}1

autoload/airline/init.vim

@@ -1,4 +1,4 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -18,38 +18,45 @@ function! airline#init#bootstrap()
 
   let g:airline#init#bootstrapping = 1
 
-  let g:airline#util#async = v:version >= 800 && has('job')
-  let g:airline#util#is_windows = has('win32') || has('win64')
+  let g:airline#init#vim_async = (v:version >= 800 && has('job'))
+  let g:airline#init#is_windows = has('win32') || has('win64')
 
   call s:check_defined('g:airline_detect_modified', 1)
   call s:check_defined('g:airline_detect_paste', 1)
   call s:check_defined('g:airline_detect_crypt', 1)
   call s:check_defined('g:airline_detect_spell', 1)
+  call s:check_defined('g:airline_detect_spelllang', 1)
   call s:check_defined('g:airline_detect_iminsert', 0)
   call s:check_defined('g:airline_inactive_collapse', 1)
   call s:check_defined('g:airline_exclude_filenames', ['DebuggerWatch','DebuggerStack','DebuggerStatus'])
   call s:check_defined('g:airline_exclude_filetypes', [])
   call s:check_defined('g:airline_exclude_preview', 0)
-  call s:check_defined('g:airline_gui_mode', airline#init#gui_mode())
 
   call s:check_defined('g:airline_mode_map', {})
   call extend(g:airline_mode_map, {
         \ '__' : '------',
-        \ 'n'  : 'NORMAL',
-        \ 'i'  : 'INSERT',
-        \ 'R'  : 'REPLACE',
-        \ 'v'  : 'VISUAL',
-        \ 'V'  : 'V-LINE',
         \ 'c'  : 'COMMAND',
-        \ '' : 'V-BLOCK',
+        \ 'i'  : 'INSERT',
+        \ 'ic' : 'INSERT COMPL',
+        \ 'ix' : 'INSERT COMPL',
+        \ 'multi' : 'MULTI',
+        \ 'n'  : 'NORMAL',
+        \ 'ni' : '(INSERT)',
+        \ 'no' : 'OP PENDING',
+        \ 'R'  : 'REPLACE',
+        \ 'Rv' : 'V REPLACE',
         \ 's'  : 'SELECT',
         \ 'S'  : 'S-LINE',
         \ '' : 'S-BLOCK',
         \ 't'  : 'TERMINAL',
+        \ 'v'  : 'VISUAL',
+        \ 'V'  : 'V-LINE',
+        \ '' : 'V-BLOCK',
         \ }, 'keep')
 
   call s:check_defined('g:airline_theme_map', {})
   call extend(g:airline_theme_map, {
+        \ 'default': 'dark',
         \ '\CTomorrow': 'tomorrow',
         \ 'base16': 'base16',
         \ 'mo[l|n]okai': 'molokai',
@@ -68,7 +75,9 @@ function! airline#init#bootstrap()
           \ 'paste': 'PASTE',
           \ 'spell': 'SPELL',
           \ 'modified': '+',
-          \ 'space': ' '
+          \ 'space': ' ',
+          \ 'keymap': 'Keymap:',
+          \ 'ellipsis': '...'
           \  }, 'keep')
 
   if get(g:, 'airline_powerline_fonts', 0)
@@ -77,7 +86,7 @@ function! airline#init#bootstrap()
     call s:check_defined('g:airline_left_alt_sep', "\ue0b1")  " 
     call s:check_defined('g:airline_right_sep', "\ue0b2")     " 
     call s:check_defined('g:airline_right_alt_sep', "\ue0b3") " 
-    " ro=, ws=☲, lnr=☰, mlnr=, br=, nx=Ɇ, crypt=🔒
+    " ro=, ws=☲, lnr=☰, mlnr=, br=, nx=Ɇ, crypt=🔒, dirty=⚡
     call extend(g:airline_symbols, {
           \ 'readonly': "\ue0a2",
           \ 'whitespace': "\u2632",
@@ -85,6 +94,7 @@ function! airline#init#bootstrap()
           \ 'maxlinenr': " \ue0a1",
           \ 'branch': "\ue0a0",
           \ 'notexists': "\u0246",
+          \ 'dirty': "\u26a1",
           \ 'crypt': nr2char(0x1F512),
           \ }, 'keep')
   elseif &encoding==?'utf-8' && !get(g:, "airline_symbols_ascii", 0)
@@ -102,6 +112,7 @@ function! airline#init#bootstrap()
           \ 'branch': "\u16A0",
           \ 'notexists': "\u0246",
           \ 'crypt': nr2char(0x1F512),
+          \ 'dirty': '!',
           \ }, 'keep')
   else
     " Symbols for ASCII terminals
@@ -117,6 +128,7 @@ function! airline#init#bootstrap()
           \ 'branch': '',
           \ 'notexists': '?',
           \ 'crypt': 'cr',
+          \ 'dirty': '!',
           \ }, 'keep')
   endif
 
@@ -133,66 +145,84 @@ function! airline#init#bootstrap()
         \ 'function': 'airline#parts#readonly',
         \ 'accent': 'red',
         \ })
-  call airline#parts#define_raw('file', '%f%m')
+  call airline#parts#define_raw('file', airline#formatter#short_path#format('%f%m'))
   call airline#parts#define_raw('path', '%F%m')
   call airline#parts#define('linenr', {
-        \ 'raw': '%{g:airline_symbols.linenr}%4l',
+        \ 'raw': '%{g:airline_symbols.linenr}%l',
         \ 'accent': 'bold'})
   call airline#parts#define('maxlinenr', {
         \ 'raw': '/%L%{g:airline_symbols.maxlinenr}',
         \ 'accent': 'bold'})
   call airline#parts#define_function('ffenc', 'airline#parts#ffenc')
-  call airline#parts#define_empty(['hunks', 'branch', 'obsession', 'tagbar',
-        \ 'syntastic-warn', 'syntastic-err', 'eclim', 'whitespace','windowswap',
+  call airline#parts#define('hunks', {
+        \ 'raw': '',
+        \ 'minwidth': 100})
+  call airline#parts#define('branch', {
+        \ 'raw': '',
+        \ 'minwidth': 80})
+  call airline#parts#define('coc_status', {
+        \ 'raw': '',
+        \ 'accent': 'bold'
+        \ })
+  call airline#parts#define_empty(['obsession', 'tagbar', 'syntastic-warn',
+        \ 'syntastic-err', 'eclim', 'whitespace','windowswap',
         \ 'ycm_error_count', 'ycm_warning_count', 'neomake_error_count',
-        \ 'neomake_warning_count', 'ale_error_count', 'ale_warning_count'])
+        \ 'neomake_warning_count', 'ale_error_count', 'ale_warning_count',
+        \ 'lsp_error_count', 'lsp_warning_count',
+        \ 'nvimlsp_error_count', 'nvimlsp_warning_count',
+        \ 'languageclient_error_count', 'languageclient_warning_count',
+        \ 'coc_warning_count', 'coc_error_count', 'vista', 'battery'])
+  call airline#parts#define_text('bookmark', '')
   call airline#parts#define_text('capslock', '')
+  call airline#parts#define_text('gutentags', '')
+  call airline#parts#define_text('gen_tags', '')
+  call airline#parts#define_text('grepper', '')
   call airline#parts#define_text('xkblayout', '')
+  call airline#parts#define_text('keymap', '')
+  call airline#parts#define_text('omnisharp', '')
 
   unlet g:airline#init#bootstrapping
 endfunction
 
-function! airline#init#gui_mode()
-  return ((has('nvim') && exists('$NVIM_TUI_ENABLE_TRUE_COLOR') && !exists("+termguicolors"))
-        \ || has('gui_running') || (has("termtruecolor") && &guicolors == 1) || (has("termguicolors") && &termguicolors == 1)) ?
-        \ 'gui' : 'cterm'
-endfunction
-
 function! airline#init#sections()
   let spc = g:airline_symbols.space
   if !exists('g:airline_section_a')
-    let g:airline_section_a = airline#section#create_left(['mode', 'crypt', 'paste', 'spell', 'capslock', 'xkblayout', 'iminsert'])
+    let g:airline_section_a = airline#section#create_left(['mode', 'crypt', 'paste', 'keymap', 'spell', 'capslock', 'xkblayout', 'iminsert'])
   endif
   if !exists('g:airline_section_b')
-    let g:airline_section_b = airline#section#create(['hunks', 'branch'])
+    if airline#util#winwidth() > 99
+      let g:airline_section_b = airline#section#create(['hunks', 'branch', 'battery'])
+    else
+      let g:airline_section_b = airline#section#create(['hunks', 'branch'])
+    endif
   endif
   if !exists('g:airline_section_c')
     if exists("+autochdir") && &autochdir == 1
-      let g:airline_section_c = airline#section#create(['%<', 'path', spc, 'readonly'])
+      let g:airline_section_c = airline#section#create(['%<', 'path', spc, 'readonly', 'coc_status'])
     else
-      let g:airline_section_c = airline#section#create(['%<', 'file', spc, 'readonly'])
+      let g:airline_section_c = airline#section#create(['%<', 'file', spc, 'readonly', 'coc_status'])
     endif
   endif
   if !exists('g:airline_section_gutter')
     let g:airline_section_gutter = airline#section#create(['%='])
   endif
   if !exists('g:airline_section_x')
-    let g:airline_section_x = airline#section#create_right(['tagbar', 'filetype'])
+    let g:airline_section_x = airline#section#create_right(['bookmark', 'tagbar', 'vista', 'gutentags', 'gen_tags', 'omnisharp', 'grepper', 'filetype'])
   endif
   if !exists('g:airline_section_y')
     let g:airline_section_y = airline#section#create_right(['ffenc'])
   endif
   if !exists('g:airline_section_z')
-    if winwidth(0) > 80
-      let g:airline_section_z = airline#section#create(['windowswap', 'obsession', '%3p%%'.spc, 'linenr', 'maxlinenr', spc.':%3v'])
+    if airline#util#winwidth() > 79
+      let g:airline_section_z = airline#section#create(['windowswap', 'obsession', '%p%%'.spc, 'linenr', 'maxlinenr', ':%v'])
     else
-      let g:airline_section_z = airline#section#create(['%3p%%'.spc, 'linenr',  ':%3v'])
+      let g:airline_section_z = airline#section#create(['%p%%'.spc, 'linenr',  ':%v'])
     endif
   endif
   if !exists('g:airline_section_error')
-    let g:airline_section_error = airline#section#create(['ycm_error_count', 'syntastic-err', 'eclim', 'neomake_error_count', 'ale_error_count'])
+    let g:airline_section_error = airline#section#create(['ycm_error_count', 'syntastic-err', 'eclim', 'neomake_error_count', 'ale_error_count', 'lsp_error_count', 'nvimlsp_error_count', 'languageclient_error_count', 'coc_error_count'])
   endif
   if !exists('g:airline_section_warning')
-    let g:airline_section_warning = airline#section#create(['ycm_warning_count',  'syntastic-warn', 'neomake_warning_count', 'ale_warning_count', 'whitespace'])
+    let g:airline_section_warning = airline#section#create(['ycm_warning_count',  'syntastic-warn', 'neomake_warning_count', 'ale_warning_count', 'lsp_warning_count', 'nvimlsp_warning_count', 'languageclient_warning_count', 'whitespace', 'coc_warning_count'])
   endif
 endfunction

autoload/airline/msdos.vim

@@ -1,4 +1,4 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling Christian Brabandt et al.
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -22,7 +22,7 @@ scriptencoding utf-8
 "     14   Yellow
 "     15   White
 
-let s:basic16 = [
+const s:basic16 = [
   \ [ 0x00, 0x00, 0x00 ],
   \ [ 0x00, 0x00, 0x80 ],
   \ [ 0x00, 0x80, 0x00 ],
@@ -41,6 +41,26 @@ let s:basic16 = [
   \ [ 0xFF, 0xFF, 0xFF ]
   \ ]
 
+if exists(":def")
+  def airline#msdos#round_msdos_colors(rgblist: list<number>): string
+    # Check for values from MSDOS 16 color terminal
+    var best = []
+    var min  = 100000
+    var t = 0
+    for value in s:basic16
+      t = abs(value[0] - rgblist[0]) +
+          abs(value[1] - rgblist[1]) +
+          abs(value[2] - rgblist[2])
+      if min > t
+        min = t
+        best = value
+      endif
+    endfor
+    return string(index(s:basic16, best))
+  enddef
+  finish
+endif
+
 function! airline#msdos#round_msdos_colors(rgblist)
   " Check for values from MSDOS 16 color terminal
   let best = []

autoload/airline/parts.vim

@@ -1,4 +1,4 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -65,7 +65,18 @@ function! airline#parts#paste()
 endfunction
 
 function! airline#parts#spell()
-  return g:airline_detect_spell && &spell ? g:airline_symbols.spell : ''
+  let spelllang = g:airline_detect_spelllang ? printf(" [%s]", toupper(substitute(&spelllang, ',', '/', 'g'))) : ''
+  if g:airline_detect_spell && &spell
+    let winwidth = airline#util#winwidth()
+    if winwidth >= 90
+      return g:airline_symbols.spell . spelllang
+    elseif winwidth >= 70
+      return g:airline_symbols.spell
+    else
+      return split(g:airline_symbols.spell, '\zs')[0]
+    endif
+  endif
+  return ''
 endfunction
 
 function! airline#parts#iminsert()
@@ -76,7 +87,12 @@ function! airline#parts#iminsert()
 endfunction
 
 function! airline#parts#readonly()
-  if &readonly && &modifiable && !filereadable(bufname('%'))
+  " only consider regular buffers (e.g. ones that represent actual files,
+  " but not special ones like e.g. NERDTree)
+  if !empty(&buftype) || airline#util#ignore_buf(bufname('%'))
+    return ''
+  endif
+  if &readonly && !filereadable(bufname('%'))
     return '[noperm]'
   else
     return &readonly ? g:airline_symbols.readonly : ''
@@ -84,7 +100,9 @@ function! airline#parts#readonly()
 endfunction
 
 function! airline#parts#filetype()
-  return winwidth(0) < 90 && strlen(&filetype) > 3 ? matchstr(&filetype, '...'). (&encoding is? 'utf-8' ? '…' : '>') : &filetype
+  return (airline#util#winwidth() < 90 && strlen(&filetype) > 3)
+        \ ? matchstr(&filetype, '...'). (&encoding is? 'utf-8' ? '…' : '>')
+        \ : &filetype
 endfunction
 
 function! airline#parts#ffenc()

autoload/airline/section.vim

@@ -1,4 +1,4 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
@@ -82,4 +82,3 @@ endfunction
 function! airline#section#create_right(parts)
   return s:create(a:parts, -1)
 endfunction
-

autoload/airline/themes.vim

@@ -1,73 +1,151 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
-" vim: et ts=2 sts=2 sw=2
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" vim: et ts=2 sts=2 sw=2 et
 
 scriptencoding utf-8
 
-" generates a dictionary which defines the colors for each highlight group
-function! airline#themes#generate_color_map(sect1, sect2, sect3, ...)
-  let palette = {
-        \ 'airline_a': [ a:sect1[0] , a:sect1[1] , a:sect1[2] , a:sect1[3] , get(a:sect1 , 4 , '') ] ,
-        \ 'airline_b': [ a:sect2[0] , a:sect2[1] , a:sect2[2] , a:sect2[3] , get(a:sect2 , 4 , '') ] ,
-        \ 'airline_c': [ a:sect3[0] , a:sect3[1] , a:sect3[2] , a:sect3[3] , get(a:sect3 , 4 , '') ] ,
-        \ }
+if !exists(":def") || (exists(":def") && get(g:, "airline_experimental", 0)==0)
+  " generates a dictionary which defines the colors for each highlight group
+  function! airline#themes#generate_color_map(sect1, sect2, sect3, ...)
+    let palette = {
+          \ 'airline_a': [ a:sect1[0] , a:sect1[1] , a:sect1[2] , a:sect1[3] , get(a:sect1 , 4 , '') ] ,
+          \ 'airline_b': [ a:sect2[0] , a:sect2[1] , a:sect2[2] , a:sect2[3] , get(a:sect2 , 4 , '') ] ,
+          \ 'airline_c': [ a:sect3[0] , a:sect3[1] , a:sect3[2] , a:sect3[3] , get(a:sect3 , 4 , '') ] ,
+          \ }
 
-  if a:0 > 0
-    call extend(palette, {
-          \ 'airline_x': [ a:1[0] , a:1[1] , a:1[2] , a:1[3] , get(a:1 , 4 , '' ) ] ,
-          \ 'airline_y': [ a:2[0] , a:2[1] , a:2[2] , a:2[3] , get(a:2 , 4 , '' ) ] ,
-          \ 'airline_z': [ a:3[0] , a:3[1] , a:3[2] , a:3[3] , get(a:3 , 4 , '' ) ] ,
-          \ })
-  else
-    call extend(palette, {
-          \ 'airline_x': [ a:sect3[0] , a:sect3[1] , a:sect3[2] , a:sect3[3] , '' ] ,
-          \ 'airline_y': [ a:sect2[0] , a:sect2[1] , a:sect2[2] , a:sect2[3] , '' ] ,
-          \ 'airline_z': [ a:sect1[0] , a:sect1[1] , a:sect1[2] , a:sect1[3] , '' ] ,
-          \ })
-  endif
-
-  return palette
-endfunction
-
-function! airline#themes#get_highlight(group, ...)
-  return call('airline#highlighter#get_highlight', [a:group] + a:000)
-endfunction
-
-function! airline#themes#get_highlight2(fg, bg, ...)
-  return call('airline#highlighter#get_highlight2', [a:fg, a:bg] + a:000)
-endfunction
-
-function! airline#themes#patch(palette)
-  for mode in keys(a:palette)
-    if !has_key(a:palette[mode], 'airline_warning')
-      let a:palette[mode]['airline_warning'] = [ '#000000', '#df5f00', 232, 166 ]
+    if a:0 > 0
+      call extend(palette, {
+            \ 'airline_x': [ a:1[0] , a:1[1] , a:1[2] , a:1[3] , get(a:1 , 4 , '' ) ] ,
+            \ 'airline_y': [ a:2[0] , a:2[1] , a:2[2] , a:2[3] , get(a:2 , 4 , '' ) ] ,
+            \ 'airline_z': [ a:3[0] , a:3[1] , a:3[2] , a:3[3] , get(a:3 , 4 , '' ) ] ,
+            \ })
+    else
+      call extend(palette, {
+            \ 'airline_x': [ a:sect3[0] , a:sect3[1] , a:sect3[2] , a:sect3[3] , '' ] ,
+            \ 'airline_y': [ a:sect2[0] , a:sect2[1] , a:sect2[2] , a:sect2[3] , '' ] ,
+            \ 'airline_z': [ a:sect1[0] , a:sect1[1] , a:sect1[2] , a:sect1[3] , '' ] ,
+            \ })
     endif
-    if !has_key(a:palette[mode], 'airline_error')
-      let a:palette[mode]['airline_error'] = [ '#000000', '#990000', 232, 160 ]
+
+    return palette
+  endfunction
+
+  function! airline#themes#get_highlight(group, ...)
+    return call('airline#highlighter#get_highlight', [a:group] + a:000)
+  endfunction
+
+  function! airline#themes#get_highlight2(fg, bg, ...)
+    return call('airline#highlighter#get_highlight2', [a:fg, a:bg] + a:000)
+  endfunction
+
+  function! airline#themes#patch(palette)
+    for mode in keys(a:palette)
+      if mode == 'accents'
+        continue
+      endif
+      if !has_key(a:palette[mode], 'airline_warning')
+        let a:palette[mode]['airline_warning'] = [ '#000000', '#df5f00', 232, 166 ]
+      endif
+      if !has_key(a:palette[mode], 'airline_error')
+        let a:palette[mode]['airline_error'] = [ '#000000', '#990000', 232, 160 ]
+      endif
+      if !has_key(a:palette[mode], 'airline_term')
+        let a:palette[mode]['airline_term'] = [ '#9cffd3', '#202020', 85, 232]
+      endif
+    endfor
+
+    let a:palette.accents = get(a:palette, 'accents', {})
+    let a:palette.accents.none = [ '', '', '', '', '' ]
+    let a:palette.accents.bold = [ '', '', '', '', 'bold' ]
+    let a:palette.accents.italic = [ '', '', '', '', 'italic' ]
+
+    if !has_key(a:palette.accents, 'red')
+      let a:palette.accents.red = [ '#ff0000' , '' , 160 , '' ]
     endif
-  endfor
+    if !has_key(a:palette.accents, 'green')
+      let a:palette.accents.green = [ '#008700' , '' , 22  , '' ]
+    endif
+    if !has_key(a:palette.accents, 'blue')
+      let a:palette.accents.blue = [ '#005fff' , '' , 27  , '' ]
+    endif
+    if !has_key(a:palette.accents, 'yellow')
+      let a:palette.accents.yellow = [ '#dfff00' , '' , 190 , '' ]
+    endif
+    if !has_key(a:palette.accents, 'orange')
+      let a:palette.accents.orange = [ '#df5f00' , '' , 166 , '' ]
+    endif
+    if !has_key(a:palette.accents, 'purple')
+      let a:palette.accents.purple = [ '#af00df' , '' , 128 , '' ]
+    endif
+  endfunction
+else
+  " New Vim9script implementation
+  def airline#themes#generate_color_map(sect1: list<string>, sect2: list<any>, sect3: list<any>): dict<any>
+		# Only allows for 3 arguments currently, because Vim9 Script does not
+		# allow for a:000
 
-  let a:palette.accents = get(a:palette, 'accents', {})
-  let a:palette.accents.none = [ '', '', '', '', '' ]
-  let a:palette.accents.bold = [ '', '', '', '', 'bold' ]
-  let a:palette.accents.italic = [ '', '', '', '', 'italic' ]
+		# all sections should be string
+		map(sect2, {_, v -> type(v) != type('') ? string(v) : v})
+    var palette = {
+			'airline_a': [ sect1[0], sect1[1], sect1[2], sect1[3], get(sect1, 4, '') ],
+			'airline_b': [ sect2[0], sect2[1], sect2[2], sect2[3], get(sect2, 4, '') ],
+			'airline_c': [ sect3[0], sect3[1], sect3[2], sect3[3], get(sect3, 4, '') ],
+			}
 
-  if !has_key(a:palette.accents, 'red')
-    let a:palette.accents.red = [ '#ff0000' , '' , 160 , '' ]
-  endif
-  if !has_key(a:palette.accents, 'green')
-    let a:palette.accents.green = [ '#008700' , '' , 22  , '' ]
-  endif
-  if !has_key(a:palette.accents, 'blue')
-    let a:palette.accents.blue = [ '#005fff' , '' , 27  , '' ]
-  endif
-  if !has_key(a:palette.accents, 'yellow')
-    let a:palette.accents.yellow = [ '#dfff00' , '' , 190 , '' ]
-  endif
-  if !has_key(a:palette.accents, 'orange')
-    let a:palette.accents.orange = [ '#df5f00' , '' , 166 , '' ]
-  endif
-  if !has_key(a:palette.accents, 'purple')
-    let a:palette.accents.purple = [ '#af00df' , '' , 128 , '' ]
-  endif
-endfunction
+		extend(palette, {
+			'airline_x': [ sect3[0], sect3[1], sect3[2], sect3[3], '' ],
+			'airline_y': [ sect2[0], sect2[1], sect2[2], sect2[3], '' ],
+			'airline_z': [ sect1[0], sect1[1], sect1[2], sect1[3], '' ],
+			})
 
+    return palette
+  enddef
+
+  def airline#themes#get_highlight(group: string): list<string>
+    return call('airline#highlighter#get_highlight', [group])
+  enddef
+
+  def airline#themes#get_highlight2(fg: list<string>, bg: list<string>): list<string>
+    return call('airline#highlighter#get_highlight2', [fg, bg])
+  enddef
+
+  def airline#themes#patch(palette: dict<any>): void
+    for mode in keys(palette)
+      if mode == 'accents'
+        continue
+      endif
+      if !has_key(palette[mode], 'airline_warning')
+        extend(palette[mode], #{airline_warning: [ '#000000', '#df5f00', '232', '166', '' ]})
+      endif
+      if !has_key(palette[mode], 'airline_error')
+        extend(palette[mode], #{airline_error: [ '#000000', '#990000', '232', '160', '' ]})
+      endif
+      if !has_key(palette[mode], 'airline_term')
+        extend(palette[mode], #{airline_term: [ '#9cffd3', '#202020', '85', '232', '']})
+      endif
+    endfor
+
+    palette.accents = get(palette, 'accents', {})
+    extend(palette.accents, #{none: [ '', '', '', '', '' ]})
+    extend(palette.accents, #{bold:  [ '', '', '', '', 'bold' ]})
+    extend(palette.accents, #{italic: [ '', '', '', '', 'italic' ]})
+
+    if !has_key(palette.accents, 'red')
+      extend(palette.accents, #{red: [ '#ff0000', '', '160', '' ]})
+    endif
+    if !has_key(palette.accents, 'green')
+      extend(palette.accents, #{green: [ '#008700', '', '22', '' ]})
+    endif
+    if !has_key(palette.accents, 'blue')
+      extend(palette.accents, #{blue: [ '#005fff', '', '27', '' ]})
+    endif
+    if !has_key(palette.accents, 'yellow')
+      extend(palette.accents, #{yellow: [ '#dfff00', '', '190', '' ]})
+    endif
+    if !has_key(palette.accents, 'orange')
+      extend(palette.accents, #{orange: [ '#df5f00', '', '166', '' ]})
+    endif
+    if !has_key(palette.accents, 'purple')
+      extend(palette.accents, #{purple: [ '#af00df', '', '128', '' ]})
+    endif
+  enddef
+endif

autoload/airline/themes/dark.vim

@@ -1,82 +1,143 @@
+" MIT License. Copyright (c) 2013-2020 Bailey Ling et al.
+" vim: et ts=2 sts=2 sw=2 tw=80
+
 scriptencoding utf-8
 
-" Each theme is contained in its own file and declares variables scoped to the
-" file.  These variables represent the possible "modes" that airline can
-" detect.  The mode is the return value of mode(), which gets converted to a
-" readable string.  The following is a list currently supported modes: normal,
-" insert, replace, visual, and inactive.
+" Airline themes are generated based on the following concepts:
+"   * The section of the status line, valid Airline statusline sections are:
+"       * airline_a (left most section)
+"       * airline_b (section just to the right of airline_a)
+"       * airline_c (section just to the right of airline_b)
+"       * airline_x (first section of the right most sections)
+"       * airline_y (section just to the right of airline_x)
+"       * airline_z (right most section)
+"   * The mode of the buffer, as reported by the :mode() function.  Airline 
+"     converts the values reported by mode() to the following:
+"       * normal
+"       * insert
+"       * replace
+"       * visual
+"       * inactive
+"       * terminal
+"       The last one is actually no real mode as returned by mode(), but used by
+"       airline to style inactive statuslines (e.g. windows, where the cursor
+"       currently does not reside in).
+"   * In addition to each section and mode specified above, airline themes 
+"     can also specify overrides.  Overrides can be provided for the following
+"     scenarios:
+"       * 'modified'
+"       * 'paste'
 "
-" Each mode can also have overrides.  These are small changes to the mode that
-" don't require a completely different look.  "modified" and "paste" are two
-" such supported overrides.  These are simply suffixed to the major mode,
-" separated by an underscore.  For example, "normal_modified" would be normal
-" mode where the current buffer is modified.
+" Airline themes are specified as a global viml dictionary using the above
+" sections, modes and overrides as keys to the dictionary.  The name of the
+" dictionary is significant and should be specified as:
+"   * g:airline#themes#<theme_name>#palette
+" where <theme_name> is substituted for the name of the theme.vim file where the
+" theme definition resides.  Airline themes should reside somewhere on the
+" 'runtimepath' where it will be loaded at vim startup, for example:  
+"   * autoload/airline/themes/theme_name.vim
 "
-" The theming algorithm is a 2-pass system where the mode will draw over all
-" parts of the statusline, and then the override is applied after.  This means
-" it is possible to specify a subset of the theme in overrides, as it will
-" simply overwrite the previous colors.  If you want simultaneous overrides,
-" then they will need to change different parts of the statusline so they do
-" not conflict with each other.
-"
-" First, let's define an empty dictionary and assign it to the "palette"
-" variable. The # is a separator that maps with the directory structure. If
-" you get this wrong, Vim will complain loudly.
+" For this, the dark.vim, theme, this is defined as
 let g:airline#themes#dark#palette = {}
 
-" First let's define some arrays. The s: is just a VimL thing for scoping the
-" variables to the current script. Without this, these variables would be
-" declared globally. Now let's declare some colors for normal mode and add it
-" to the dictionary.  The array is in the format:
-" [ guifg, guibg, ctermfg, ctermbg, opts ]. See "help attr-list" for valid
-" values for the "opt" value.
-let s:N1   = [ '#00005f' , '#dfff00' , 17  , 190 ]
-let s:N2   = [ '#ffffff' , '#444444' , 255 , 238 ]
-let s:N3   = [ '#9cffd3' , '#202020' , 85  , 234 ]
-let g:airline#themes#dark#palette.normal = airline#themes#generate_color_map(s:N1, s:N2, s:N3)
+" Keys in the dictionary are composed of the mode, and if specified the
+" override.  For example:
+"   * g:airline#themes#dark#palette.normal 
+"       * the colors for a statusline while in normal mode
+"   * g:airline#themes#dark#palette.normal_modified 
+"       * the colors for a statusline while in normal mode when the buffer has
+"         been modified
+"   * g:airline#themes#dark#palette.visual 
+"       * the colors for a statusline while in visual mode
+"
+" Values for each dictionary key is an array of color values that should be
+" familiar for colorscheme designers:
+"   * [guifg, guibg, ctermfg, ctermbg, opts]
+" See "help attr-list" for valid values for the "opt" value.
+"
+" Each theme must provide an array of such values for each airline section of
+" the statusline (airline_a through airline_z).  A convenience function, 
+" airline#themes#generate_color_map() exists to mirror airline_a/b/c to
+" airline_x/y/z, respectively.
+
+" The dark.vim theme:
+let s:airline_a_normal   = [ '#00005f' , '#dfff00' , '17'  , '190' ]
+let s:airline_b_normal   = [ '#ffffff' , '#444444' , '255' , '238' ]
+let s:airline_c_normal   = [ '#9cffd3' , '#202020' , '85'  , '234' ]
+let g:airline#themes#dark#palette.normal = airline#themes#generate_color_map(s:airline_a_normal, s:airline_b_normal, s:airline_c_normal)
+
+" It should be noted the above is equivalent to:
+" let g:airline#themes#dark#palette.normal = airline#themes#generate_color_map(
+"    \  [ '#00005f' , '#dfff00' , 17  , 190 ],  " section airline_a
+"    \  [ '#ffffff' , '#444444' , 255 , 238 ],  " section airline_b
+"    \  [ '#9cffd3' , '#202020' , 85  , 234 ]   " section airline_c
+"    \)
+"
+" In turn, that is equivalent to:
+" let g:airline#themes#dark#palette.normal = {
+"    \  'airline_a': [ '#00005f' , '#dfff00' , 17  , 190 ],  "section airline_a
+"    \  'airline_b': [ '#ffffff' , '#444444' , 255 , 238 ],  "section airline_b
+"    \  'airline_c': [ '#9cffd3' , '#202020' , 85  , 234 ],  "section airline_c
+"    \  'airline_x': [ '#9cffd3' , '#202020' , 85  , 234 ],  "section airline_x
+"    \  'airline_y': [ '#ffffff' , '#444444' , 255 , 238 ],  "section airline_y
+"    \  'airline_z': [ '#00005f' , '#dfff00' , 17  , 190 ]   "section airline_z
+"    \}
+"
+" airline#themes#generate_color_map() also uses the values provided as
+" parameters to create intermediary groups such as:
+"   airline_a_to_airline_b
+"   airline_b_to_airline_c
+"   etc...
 
 " Here we define overrides for when the buffer is modified.  This will be
 " applied after g:airline#themes#dark#palette.normal, hence why only certain keys are
 " declared.
 let g:airline#themes#dark#palette.normal_modified = {
-      \ 'airline_c': [ '#ffffff' , '#5f005f' , 255     , 53      , ''     ] ,
+      \ 'airline_c': [ '#ffffff' , '#5f005f' , '255'     , '53'      , ''     ] ,
       \ }
 
 
-let s:I1 = [ '#00005f' , '#00dfff' , 17  , 45  ]
-let s:I2 = [ '#ffffff' , '#005fff' , 255 , 27  ]
-let s:I3 = [ '#ffffff' , '#000080' , 15  , 17  ]
-let g:airline#themes#dark#palette.insert = airline#themes#generate_color_map(s:I1, s:I2, s:I3)
+let s:airline_a_insert = [ '#00005f' , '#00dfff' , '17'  , '45'  ]
+let s:airline_b_insert = [ '#ffffff' , '#005fff' , '255' , '27'  ]
+let s:airline_c_insert = [ '#ffffff' , '#000080' , '15'  , '17'  ]
+let g:airline#themes#dark#palette.insert = airline#themes#generate_color_map(s:airline_a_insert, s:airline_b_insert, s:airline_c_insert)
 let g:airline#themes#dark#palette.insert_modified = {
-      \ 'airline_c': [ '#ffffff' , '#5f005f' , 255     , 53      , ''     ] ,
+      \ 'airline_c': [ '#ffffff' , '#5f005f' , '255'     , '53'      , ''     ] ,
       \ }
 let g:airline#themes#dark#palette.insert_paste = {
-      \ 'airline_a': [ s:I1[0]   , '#d78700' , s:I1[2] , 172     , ''     ] ,
+      \ 'airline_a': [ s:airline_a_insert[0]   , '#d78700' , s:airline_a_insert[2] , '172'     , ''     ] ,
       \ }
 
+let g:airline#themes#dark#palette.terminal = airline#themes#generate_color_map(s:airline_a_insert, s:airline_b_insert, s:airline_c_insert)
 
 let g:airline#themes#dark#palette.replace = copy(g:airline#themes#dark#palette.insert)
-let g:airline#themes#dark#palette.replace.airline_a = [ s:I2[0]   , '#af0000' , s:I2[2] , 124     , ''     ]
+let g:airline#themes#dark#palette.replace.airline_a = [ s:airline_b_insert[0]   , '#af0000' , s:airline_b_insert[2] , '124'     , ''     ]
 let g:airline#themes#dark#palette.replace_modified = g:airline#themes#dark#palette.insert_modified
 
 
-let s:V1 = [ '#000000' , '#ffaf00' , 232 , 214 ]
-let s:V2 = [ '#000000' , '#ff5f00' , 232 , 202 ]
-let s:V3 = [ '#ffffff' , '#5f0000' , 15  , 52  ]
-let g:airline#themes#dark#palette.visual = airline#themes#generate_color_map(s:V1, s:V2, s:V3)
+let s:airline_a_visual = [ '#000000' , '#ffaf00' , '232' , '214' ]
+let s:airline_b_visual = [ '#000000' , '#ff5f00' , '232' , '202' ]
+let s:airline_c_visual = [ '#ffffff' , '#5f0000' , '15'  , '52'  ]
+let g:airline#themes#dark#palette.visual = airline#themes#generate_color_map(s:airline_a_visual, s:airline_b_visual, s:airline_c_visual)
 let g:airline#themes#dark#palette.visual_modified = {
-      \ 'airline_c': [ '#ffffff' , '#5f005f' , 255     , 53      , ''     ] ,
+      \ 'airline_c': [ '#ffffff' , '#5f005f' , '255'     , '53'      , ''     ] ,
       \ }
 
 
-let s:IA1 = [ '#4e4e4e' , '#1c1c1c' , 239 , 234 , '' ]
-let s:IA2 = [ '#4e4e4e' , '#262626' , 239 , 235 , '' ]
-let s:IA3 = [ '#4e4e4e' , '#303030' , 239 , 236 , '' ]
-let g:airline#themes#dark#palette.inactive = airline#themes#generate_color_map(s:IA1, s:IA2, s:IA3)
+let s:airline_a_inactive = [ '#4e4e4e' , '#1c1c1c' , '239' , '234' , '' ]
+let s:airline_b_inactive = [ '#4e4e4e' , '#262626' , '239' , '235' , '' ]
+let s:airline_c_inactive = [ '#4e4e4e' , '#303030' , '239' , '236' , '' ]
+let g:airline#themes#dark#palette.inactive = airline#themes#generate_color_map(s:airline_a_inactive, s:airline_b_inactive, s:airline_c_inactive)
 let g:airline#themes#dark#palette.inactive_modified = {
-      \ 'airline_c': [ '#875faf' , '' , 97 , '' , '' ] ,
+      \ 'airline_c': [ '#875faf' , '' , '97' , '' , '' ] ,
       \ }
 
+" For commandline mode, we use the colors from normal mode, except the mode
+" indicator should be colored differently, e.g. light green
+let s:airline_a_commandline = [ '#0000ff' , '#0cff00' , '17'  , '40' ]
+let s:airline_b_commandline = [ '#ffffff' , '#444444' , '255' , '238' ]
+let s:airline_c_commandline = [ '#9cffd3' , '#202020' , '85'  , '234' ]
+let g:airline#themes#dark#palette.commandline = airline#themes#generate_color_map(s:airline_a_commandline, s:airline_b_commandline, s:airline_c_commandline)
 
 " Accents are used to give parts within a section a slightly different look or
 " color. Here we are defining a "red" accent, which is used by the 'readonly'
@@ -86,18 +147,17 @@ let g:airline#themes#dark#palette.inactive_modified = {
 " will be red instead of the section's foreground color. You can also have
 " multiple parts with accents within a section.
 let g:airline#themes#dark#palette.accents = {
-      \ 'red': [ '#ff0000' , '' , 160 , ''  ]
+      \ 'red': [ '#ff0000' , '' , '160' , ''  ]
       \ }
 
 
 " Here we define the color map for ctrlp.  We check for the g:loaded_ctrlp
-" variable so that related functionality is loaded iff the user is using
+" variable so that related functionality is loaded if the user is using
 " ctrlp. Note that this is optional, and if you do not define ctrlp colors
 " they will be chosen automatically from the existing palette.
 if get(g:, 'loaded_ctrlp', 0)
   let g:airline#themes#dark#palette.ctrlp = airline#extensions#ctrlp#generate_color_map(
-        \ [ '#d7d7ff' , '#5f00af' , 189 , 55  , ''     ],
-        \ [ '#ffffff' , '#875fd7' , 231 , 98  , ''     ],
-        \ [ '#5f00af' , '#ffffff' , 55  , 231 , 'bold' ])
+        \ [ '#d7d7ff' , '#5f00af' , '189' , '55'  , ''     ],
+        \ [ '#ffffff' , '#875fd7' , '231' , '98'  , ''     ],
+        \ [ '#5f00af' , '#ffffff' , '55'  , '231' , 'bold' ])
 endif
-

autoload/airline/util.vim

@@ -1,13 +1,32 @@
-" MIT License. Copyright (c) 2013-2016 Bailey Ling.
+" MIT License. Copyright (c) 2013-2020 Bailey Ling Christian Brabandt et al.
 " vim: et ts=2 sts=2 sw=2
 
 scriptencoding utf-8
 
 call airline#init#bootstrap()
+
+" couple of static variables. Those should not change within a session, thus
+" can be initialized here as "static"
 let s:spc = g:airline_symbols.space
+let s:nomodeline = (v:version > 703 || (v:version == 703 && has("patch438"))) ? '<nomodeline>' : ''
+let s:has_strchars = exists('*strchars')
+let s:has_strcharpart = exists('*strcharpart')
+let s:focusgained_ignore_time = 0
+
+" TODO: Try to cache winwidth(0) function
+" e.g. store winwidth per window and access that, only update it, if the size
+" actually changed.
+function! airline#util#winwidth(...)
+  let nr = get(a:000, 0, 0)
+  if get(g:, 'airline_statusline_ontop', 0)
+    return &columns
+  else
+    return winwidth(nr)
+  endif
+endfunction
 
 function! airline#util#shorten(text, winwidth, minwidth, ...)
-  if winwidth(0) < a:winwidth && len(split(a:text, '\zs')) > a:minwidth
+  if airline#util#winwidth() < a:winwidth && len(split(a:text, '\zs')) > a:minwidth
     if get(a:000, 0, 0)
       " shorten from tail
       return '…'.matchstr(a:text, '.\{'.a:minwidth.'}$')
@@ -21,14 +40,14 @@ function! airline#util#shorten(text, winwidth, minwidth, ...)
 endfunction
 
 function! airline#util#wrap(text, minwidth)
-  if a:minwidth > 0 && winwidth(0) < a:minwidth
+  if a:minwidth > 0 && airline#util#winwidth() < a:minwidth
     return ''
   endif
   return a:text
 endfunction
 
 function! airline#util#append(text, minwidth)
-  if a:minwidth > 0 && winwidth(0) < a:minwidth
+  if a:minwidth > 0 && airline#util#winwidth() < a:minwidth
     return ''
   endif
   let prefix = s:spc == "\ua0" ? s:spc : s:spc.s:spc
@@ -42,12 +61,23 @@ function! airline#util#warning(msg)
 endfunction
 
 function! airline#util#prepend(text, minwidth)
-  if a:minwidth > 0 && winwidth(0) < a:minwidth
+  if a:minwidth > 0 && airline#util#winwidth() < a:minwidth
     return ''
   endif
   return empty(a:text) ? '' : a:text.s:spc.g:airline_right_alt_sep.s:spc
 endfunction
 
+if v:version >= 704
+  function! airline#util#getbufvar(bufnr, key, def)
+    return getbufvar(a:bufnr, a:key, a:def)
+  endfunction
+else
+  function! airline#util#getbufvar(bufnr, key, def)
+    let bufvals = getbufvar(a:bufnr, '')
+    return get(bufvals, a:key, a:def)
+  endfunction
+endif
+
 if v:version >= 704
   function! airline#util#getwinvar(winnr, key, def)
     return getwinvar(a:winnr, a:key, a:def)
@@ -84,30 +114,99 @@ else
   endfunction
 endif
 
-" Define a wrapper over system() that uses nvim's async job control if
-" available. This way we avoid overwriting v:shell_error, which might
-" potentially disrupt other plugins.
-if has('nvim')
-  function! s:system_job_handler(job_id, data, event) dict
-    if a:event == 'stdout'
-      let self.buf .=  join(a:data)
-    endif
-  endfunction
+" Compatibility wrapper for strchars, in case this vim version does not
+" have it natively
+function! airline#util#strchars(str)
+  if s:has_strchars
+    return strchars(a:str)
+  else
+    return strlen(substitute(a:str, '.', 'a', 'g'))
+  endif
+endfunction
+
+function! airline#util#strcharpart(...)
+  if s:has_strcharpart
+    return call('strcharpart',  a:000)
+  else
+    " does not handle multibyte chars :(
+    return a:1[(a:2):(a:3)]
+  endif
+endfunction
+
+function! airline#util#ignore_buf(name)
+  let pat = '\c\v'. get(g:, 'airline#ignore_bufadd_pat', '').
+        \ get(g:, 'airline#extensions#tabline#ignore_bufadd_pat', 
+        \ '!|defx|gundo|nerd_tree|startify|tagbar|term://|undotree|vimfiler')
+  return match(a:name, pat) > -1
+endfunction
+
+function! airline#util#has_fugitive()
+  if !exists("s:has_fugitive")
+    let s:has_fugitive = exists('*fugitive#head') || exists('*FugitiveHead')
+  endif
+  return s:has_fugitive
+endfunction
+
+function! airline#util#has_gina()
+  if !exists("s:has_gina")
+    let s:has_gina = (exists(':Gina') && v:version >= 800)
+  endif
+  return s:has_gina
+endfunction
+
+
+function! airline#util#has_lawrencium()
+  if !exists("s:has_lawrencium")
+    let s:has_lawrencium  = exists('*lawrencium#statusline')
+  endif
+  return s:has_lawrencium
+endfunction
+
+function! airline#util#has_vcscommand()
+  if !exists("s:has_vcscommand")
+    let s:has_vcscommand = exists('*VCSCommandGetStatusLine')
+  endif
+  return get(g:, 'airline#extensions#branch#use_vcscommand', 0) && s:has_vcscommand
+endfunction
+
+function! airline#util#has_custom_scm()
+  return !empty(get(g:, 'airline#extensions#branch#custom_head', ''))
+endfunction
+
+function! airline#util#doautocmd(event)
+  exe printf("silent doautocmd %s User %s", s:nomodeline, a:event)
+endfunction
+
+function! airline#util#themes(match)
+  let files = split(globpath(&rtp, 'autoload/airline/themes/'.a:match.'*.vim'), "\n")
+  return sort(map(files, 'fnamemodify(v:val, ":t:r")') + ('random' =~ a:match ? ['random'] : []))
+endfunction
+
+function! airline#util#stl_disabled(winnr)
+  " setting the statusline is disabled,
+  " either globally, per window, or per buffer
+  " w:airline_disabled is deprecated!
+  return get(g:, 'airline_disable_statusline', 0) ||
+   \ airline#util#getwinvar(a:winnr, 'airline_disable_statusline', 0) ||
+   \ airline#util#getwinvar(a:winnr, 'airline_disabled', 0) ||
+   \ airline#util#getbufvar(winbufnr(a:winnr), 'airline_disable_statusline', 0)
+endfunction
+
+function! airline#util#ignore_next_focusgain()
+  if has('win32')
+    " Setup an ignore for platforms that trigger FocusLost on calls to
+    " system(). macvim (gui and terminal) and Linux terminal vim do not.
+    let s:focusgained_ignore_time = localtime()
+  endif
+endfunction
+
+function! airline#util#try_focusgained()
+  " Ignore lasts for at most one second and is cleared on the first
+  " focusgained. We use ignore to prevent system() calls from triggering
+  " FocusGained (which occurs 100% on win32 and seem to sometimes occur under
+  " tmux).
+  let dt = localtime() - s:focusgained_ignore_time
+  let s:focusgained_ignore_time = 0
+  return dt >= 1
+endfunction
 
-  function! airline#util#system(cmd)
-    let l:config = {
-    \ 'buf': '',
-    \ 'on_stdout': function('s:system_job_handler'),
-    \ }
-    let l:id = jobstart(a:cmd, l:config)
-    if l:id < 1
-      return system(a:cmd)
-    endif
-    call jobwait([l:id])
-    return l:config.buf
-  endfunction
-else
-  function! airline#util#system(cmd)
-    return system(a:cmd)
-  endfunction
-endif