From ba9a3dbc4ed4dc2b75e2678955879492175a4223 Mon Sep 17 00:00:00 2001
From: Ian Emnace <igemnace@gmail.com>
Date: Tue, 19 Mar 2019 13:44:46 +0800
Subject: [PATCH] Allow for configurable g:vue_pre_processors

Prior to this commit, there was a single Boolean option,
g:vue_disable_pre_processors, which would only activate either *every*
pre-processor syntax file or none of them at all.

This was a known pain point when it comes to performance. On some
machines, loading all the pre-processor syntax files could slow down Vim
noticeably, hence the need for such an option in the first place.
However, turning all of them off means having to live with no syntax
highlighting at all if one uses a pre-processor language.

This commit introduces another option: g:vue_pre_processors. This is a
List of names of pre-processor syntaxes, e.g. ['pug','scss']. If a user
provides this option, only the named pre-processor syntax files will be
loaded.

This change still allows for g:vue_disable_pre_processors: If
g:vue_disable_pre_processors is truthy, pre-processor syntax files
aren't loaded regardless of the value of g:vue_pre_processors.
---
 syntax/vue.vim | 35 +++++++++++++++++++++++++----------
 1 file changed, 25 insertions(+), 10 deletions(-)

diff --git a/syntax/vue.vim b/syntax/vue.vim
index 3d3d514..4946b9d 100644
--- a/syntax/vue.vim
+++ b/syntax/vue.vim
@@ -42,17 +42,32 @@ function! s:register_language(language, tag, ...)
   endif
 endfunction
 
+let s:language_config = {
+      \ 'less':       ['less', 'style'],
+      \ 'pug':        ['pug', 'template', s:attr('lang', '\%(pug\|jade\)')],
+      \ 'slm':        ['slm', 'template'],
+      \ 'handlebars': ['handlebars', 'template'],
+      \ 'haml':       ['haml', 'template'],
+      \ 'typescript': ['typescript', 'script', '\%(lang=\("\|''\)[^\1]*\(ts\|typescript\)[^\1]*\1\|ts\)'],
+      \ 'coffee':     ['coffee', 'script'],
+      \ 'stylus':     ['stylus', 'style'],
+      \ 'sass':       ['sass', 'style'],
+      \ 'scss':       ['scss', 'style'],
+      \ }
+
+
 if !exists("g:vue_disable_pre_processors") || !g:vue_disable_pre_processors
-  call s:register_language('less', 'style')
-  call s:register_language('pug', 'template', s:attr('lang', '\%(pug\|jade\)'))
-  call s:register_language('slm', 'template')
-  call s:register_language('handlebars', 'template')
-  call s:register_language('haml', 'template')
-  call s:register_language('typescript', 'script', '\%(lang=\("\|''\)[^\1]*\(ts\|typescript\)[^\1]*\1\|ts\)')
-  call s:register_language('coffee', 'script')
-  call s:register_language('stylus', 'style')
-  call s:register_language('sass', 'style')
-  call s:register_language('scss', 'style')
+  if exists("g:vue_pre_processors")
+    let pre_processors = g:vue_pre_processors
+  else
+    let pre_processors = keys(s:language_config)
+  endif
+
+  for language in pre_processors
+    if has_key(s:language_config, language)
+      call call("s:register_language", get(s:language_config, language))
+    endif
+  endfor
 endif
 
 syn region  vueSurroundingTag   contained start=+<\(script\|style\|template\)+ end=+>+ fold contains=htmlTagN,htmlString,htmlArg,htmlValue,htmlTagError,htmlEvent