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whitespace: support multiline statusline for warnings

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Add a new airline_section_warning2 that displays whitespace warnings on
a second statusline line when Vim supports the statuslineopt option
(Vim 9.2.0083+) and g:airline_multiline is set. The second line only
appears when there are actual whitespace issues, avoiding an empty
second line when the buffer is clean.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Christian Brabandt
2026-04-12 08:15:15 +00:00
parent 7fe264257e
commit ee44d57525
7 changed files with 77 additions and 16 deletions
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doc/airline.txt
+7
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@@ -57,6 +57,8 @@ this: >
+---------------------------------------------------------------------------+
| A | B | C X | Y | Z | [...] |
+---------------------------------------------------------------------------+
| [...] |
+---------------------------------------------------------------------------+
The statusline is the colored line at the bottom, which contains the sections
(possibly in different colors):
@@ -82,6 +84,7 @@ section meaning (example)~
<
[...] additional sections (warning/errors/statistics)
from external plugins (e.g. YCM/syntastic/...)
Can be shown on a second line optionally.
For a better look, those sections can be colored differently, depending on
the mode and whether the current file is 'modified'
@@ -124,6 +127,9 @@ values):
" Currently: Enable Vim9 Script implementation
let g:airline_experimental = 1
* enable multiline feature (requires Vim 9.2.0083) >
let g:airline_multiline = 1
* the separator used on the left side >
let g:airline_left_sep='>'
<
@@ -445,6 +451,7 @@ window.
languageclient_error_count)
let g:airline_section_warning (ycm_warning_count, syntastic-warn,
languageclient_warning_count, whitespace)
let g:airline_section_warning2 (whitespace) [optional]
" [*] This section needs at least the fugitive extension or else
" it will remain empty