Add liquid support for old Vim, #301.9.1

6 files changed, 275 insertions, 0 deletions

diff --git a/README.md b/README.md
index ef3ad871..cd2a773a 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,7 @@ Optionally download one of the [releases](https://github.com/sheerun/vim-polyglo
 - [jst](https://github.com/briancollins/vim-jst) (syntax, indent, ftdetect)
 - [latex](https://github.com/LaTeX-Box-Team/LaTeX-Box) (syntax, indent, ftplugin)
 - [less](https://github.com/groenewege/vim-less) (syntax, indent, ftplugin, ftdetect)
+- [liquid](https://github.com/tpope/vim-liquid) (syntax, indent, ftplugin, ftdetect)
 - [markdown](https://github.com/tpope/vim-markdown) (syntax, ftplugin, ftdetect)
 - [nginx](https://github.com/mutewinter/nginx.vim) (syntax, ftdetect)
 - [ocaml](https://github.com/jrk/vim-ocaml) (syntax, indent, ftplugin)
diff --git a/build b/build
index 1ce37ba0..7e0ff19c 100755
--- a/build
+++ b/build
@@ -92,6 +92,7 @@ PACKS="
   jst:briancollins/vim-jst
   latex:LaTeX-Box-Team/LaTeX-Box
   less:groenewege/vim-less
+  liquid:tpope/vim-liquid
   markdown:tpope/vim-markdown
   nginx:mutewinter/nginx.vim
   ocaml:jrk/vim-ocaml
diff --git a/ftdetect/polyglot.vim b/ftdetect/polyglot.vim
index 3024bb83..3e74c6ff 100644
--- a/ftdetect/polyglot.vim
+++ b/ftdetect/polyglot.vim
@@ -72,6 +72,18 @@ au BufNewFile,BufRead *.ejs		set filetype=jst
 au BufNewFile,BufRead *.jst  		set filetype=jst
 au BufNewFile,BufRead *.hamljs set filetype=jst
 autocmd BufNewFile,BufRead *.less setf less
+au BufNewFile,BufRead *.liquid					set ft=liquid
+au BufNewFile,BufRead */_layouts/*.html,*/_includes/*.html	set ft=liquid
+au BufNewFile,BufRead *.html,*.xml,*.textile
+      \ if getline(1) == '---' | set ft=liquid | endif
+au BufNewFile,BufRead *.markdown,*.mkd,*.mkdn,*.md
+      \ if getline(1) == '---' |
+      \   let b:liquid_subtype = 'markdown' |
+      \   set ft=liquid |
+      \ endif
+au BufNewFile,BufRead */templates/**.liquid,*/layout/**.liquid,*/snippets/**.liquid
+      \ let b:liquid_subtype = 'html' |
+      \ set ft=liquid |
 autocmd BufNewFile,BufRead *.markdown,*.md,*.mdown,*.mkd,*.mkdn
       \ if &ft =~# '^\%(conf\|modula2\)$' |
       \   set ft=markdown |
diff --git a/ftplugin/liquid.vim b/ftplugin/liquid.vim
new file mode 100644
index 00000000..b211a884
--- /dev/null
+++ b/ftplugin/liquid.vim
@@ -0,0 +1,61 @@
+" Vim filetype plugin
+" Language:     Liquid
+" Maintainer:   Tim Pope <vimNOSPAM@tpope.org>
+" Last Change:	2010 May 21
+
+if exists('b:did_ftplugin')
+  finish
+endif
+
+if !exists('g:liquid_default_subtype')
+  let g:liquid_default_subtype = 'html'
+endif
+
+if !exists('b:liquid_subtype')
+  let s:lines = getline(1)."\n".getline(2)."\n".getline(3)."\n".getline(4)."\n".getline(5)."\n".getline("$")
+  let b:liquid_subtype = matchstr(s:lines,'liquid_subtype=\zs\w\+')
+  if b:liquid_subtype == ''
+    let b:liquid_subtype = matchstr(&filetype,'^liquid\.\zs\w\+')
+  endif
+  if b:liquid_subtype == ''
+    let b:liquid_subtype = matchstr(substitute(expand('%:t'),'\c\%(\.liquid\)\+$','',''),'\.\zs\w\+$')
+  endif
+  if b:liquid_subtype == ''
+    let b:liquid_subtype = g:liquid_default_subtype
+  endif
+endif
+
+if exists('b:liquid_subtype') && b:liquid_subtype != ''
+  exe 'runtime! ftplugin/'.b:liquid_subtype.'.vim ftplugin/'.b:liquid_subtype.'_*.vim ftplugin/'.b:liquid_subtype.'/*.vim'
+else
+  runtime! ftplugin/html.vim ftplugin/html_*.vim ftplugin/html/*.vim
+endif
+let b:did_ftplugin = 1
+
+if exists('b:undo_ftplugin')
+  let b:undo_ftplugin .= '|'
+else
+  let b:undo_ftplugin = ''
+endif
+if exists('b:browsefilter')
+  let b:browsefilter = "\n".b:browsefilter
+else
+  let b:browsefilter = ''
+endif
+if exists('b:match_words')
+  let b:match_words .= ','
+elseif exists('loaded_matchit')
+  let b:match_words = ''
+endif
+
+if has('gui_win32')
+  let b:browsefilter="Liquid Files (*.liquid)\t*.liquid" . b:browsefilter
+endif
+
+if exists('loaded_matchit')
+  let b:match_words .= '\<\%(if\w*\|unless\|case\)\>:\<\%(elsif\|else\|when\)\>:\<end\%(if\w*\|unless\|case\)\>,\<\%(for\|tablerow\)\>:\%({%\s*\)\@<=empty\>:\<end\%(for\|tablerow\)\>,<\(capture\|comment\|highlight\)\>:\<end\1\>'
+endif
+
+setlocal commentstring={%\ comment\ %}%s{%\ endcomment\ %}
+
+let b:undo_ftplugin .= 'setl cms< | unlet! b:browsefilter b:match_words'
diff --git a/indent/liquid.vim b/indent/liquid.vim
new file mode 100644
index 00000000..2f729f00
--- /dev/null
+++ b/indent/liquid.vim
@@ -0,0 +1,62 @@
+" Vim indent file
+" Language:     Liquid
+" Maintainer:   Tim Pope <vimNOSPAM@tpope.org>
+" Last Change:	2010 May 21
+
+if exists('b:did_indent')
+  finish
+endif
+
+set indentexpr=
+if exists('b:liquid_subtype')
+  exe 'runtime! indent/'.b:liquid_subtype.'.vim'
+else
+  runtime! indent/html.vim
+endif
+unlet! b:did_indent
+
+if &l:indentexpr == ''
+  if &l:cindent
+    let &l:indentexpr = 'cindent(v:lnum)'
+  else
+    let &l:indentexpr = 'indent(prevnonblank(v:lnum-1))'
+  endif
+endif
+let b:liquid_subtype_indentexpr = &l:indentexpr
+
+let b:did_indent = 1
+
+setlocal indentexpr=GetLiquidIndent()
+setlocal indentkeys=o,O,*<Return>,<>>,{,},0),0],o,O,!^F,=end,=endif,=endunless,=endifchanged,=endcase,=endfor,=endtablerow,=endcapture,=else,=elsif,=when,=empty
+
+" Only define the function once.
+if exists('*GetLiquidIndent')
+  finish
+endif
+
+function! s:count(string,pattern)
+  let string = substitute(a:string,'\C'.a:pattern,"\n",'g')
+  return strlen(substitute(string,"[^\n]",'','g'))
+endfunction
+
+function! GetLiquidIndent(...)
+  if a:0 && a:1 == '.'
+    let v:lnum = line('.')
+  elseif a:0 && a:1 =~ '^\d'
+    let v:lnum = a:1
+  endif
+  let vcol = col('.')
+  call cursor(v:lnum,1)
+  exe "let ind = ".b:liquid_subtype_indentexpr
+  let lnum = prevnonblank(v:lnum-1)
+  let line = getline(lnum)
+  let cline = getline(v:lnum)
+  let line  = substitute(line,'\C^\%(\s*{%\s*end\w*\s*%}\)\+','','')
+  let line .= matchstr(cline,'\C^\%(\s*{%\s*end\w*\s*%}\)\+')
+  let cline = substitute(cline,'\C^\%(\s*{%\s*end\w*\s*%}\)\+','','')
+  let ind += &sw * s:count(line,'{%\s*\%(if\|elsif\|else\|unless\|ifchanged\|case\|when\|for\|empty\|tablerow\|capture\)\>')
+  let ind -= &sw * s:count(line,'{%\s*end\%(if\|unless\|ifchanged\|case\|for\|tablerow\|capture\)\>')
+  let ind -= &sw * s:count(cline,'{%\s*\%(elsif\|else\|when\|empty\)\>')
+  let ind -= &sw * s:count(cline,'{%\s*end\w*$')
+  return ind
+endfunction
diff --git a/syntax/liquid.vim b/syntax/liquid.vim
new file mode 100644
index 00000000..a52c780d
--- /dev/null
+++ b/syntax/liquid.vim
@@ -0,0 +1,138 @@
+" Vim syntax file
+" Language:     Liquid
+" Maintainer:   Tim Pope <vimNOSPAM@tpope.org>
+" Filenames:    *.liquid
+" Last Change:	2010 May 21
+
+if exists('b:current_syntax')
+  finish
+endif
+
+if !exists('main_syntax')
+  let main_syntax = 'liquid'
+endif
+
+if !exists('g:liquid_default_subtype')
+  let g:liquid_default_subtype = 'html'
+endif
+
+if !exists('b:liquid_subtype') && main_syntax == 'liquid'
+  let s:lines = getline(1)."\n".getline(2)."\n".getline(3)."\n".getline(4)."\n".getline(5)."\n".getline("$")
+  let b:liquid_subtype = matchstr(s:lines,'liquid_subtype=\zs\w\+')
+  if b:liquid_subtype == ''
+    let b:liquid_subtype = matchstr(&filetype,'^liquid\.\zs\w\+')
+  endif
+  if b:liquid_subtype == ''
+    let b:liquid_subtype = matchstr(substitute(expand('%:t'),'\c\%(\.liquid\)\+$','',''),'\.\zs\w\+$')
+  endif
+  if b:liquid_subtype == ''
+    let b:liquid_subtype = g:liquid_default_subtype
+  endif
+endif
+
+if exists('b:liquid_subtype') && b:liquid_subtype != ''
+  exe 'runtime! syntax/'.b:liquid_subtype.'.vim'
+  unlet! b:current_syntax
+endif
+
+syn case match
+
+if exists('b:liquid_subtype') && b:liquid_subtype != 'yaml'
+  " YAML Front Matter
+  syn include @liquidYamlTop syntax/yaml.vim
+  unlet! b:current_syntax
+  syn region liquidYamlHead start="\%^---$" end="^---\s*$" keepend contains=@liquidYamlTop,@Spell
+endif
+
+if !exists('g:liquid_highlight_types')
+  let g:liquid_highlight_types = []
+endif
+
+if !exists('s:subtype')
+  let s:subtype = exists('b:liquid_subtype') ? b:liquid_subtype : ''
+
+  for s:type in map(copy(g:liquid_highlight_types),'matchstr(v:val,"[^=]*$")')
+    if s:type =~ '\.'
+      let b:{matchstr(s:type,'[^.]*')}_subtype = matchstr(s:type,'\.\zs.*')
+    endif
+    exe 'syn include @liquidHighlight'.substitute(s:type,'\.','','g').' syntax/'.matchstr(s:type,'[^.]*').'.vim'
+    unlet! b:current_syntax
+  endfor
+  unlet! s:type
+
+  if s:subtype == ''
+    unlet! b:liquid_subtype
+  else
+    let b:liquid_subtype = s:subtype
+  endif
+  unlet s:subtype
+endif
+
+syn region  liquidStatement  matchgroup=liquidDelimiter start="{%" end="%}" contains=@liquidStatement containedin=ALLBUT,@liquidExempt keepend
+syn region  liquidExpression matchgroup=liquidDelimiter start="{{" end="}}" contains=@liquidExpression  containedin=ALLBUT,@liquidExempt keepend
+syn region  liquidComment    matchgroup=liquidDelimiter start="{%\s*comment\s*%}" end="{%\s*endcomment\s*%}" contains=liquidTodo,@Spell containedin=ALLBUT,@liquidExempt keepend
+syn region  liquidRaw        matchgroup=liquidDelimiter start="{%\s*raw\s*%}" end="{%\s*endraw\s*%}" contains=TOP,@liquidExempt containedin=ALLBUT,@liquidExempt keepend
+
+syn cluster liquidExempt contains=liquidStatement,liquidExpression,liquidComment,liquidRaw,@liquidStatement,liquidYamlHead
+syn cluster liquidStatement contains=liquidConditional,liquidRepeat,liquidKeyword,@liquidExpression
+syn cluster liquidExpression contains=liquidOperator,liquidString,liquidNumber,liquidFloat,liquidBoolean,liquidNull,liquidEmpty,liquidPipe,liquidForloop
+
+syn keyword liquidKeyword highlight nextgroup=liquidTypeHighlight skipwhite contained
+syn keyword liquidKeyword endhighlight contained
+syn region liquidHighlight start="{%\s*highlight\s\+\w\+\s*%}" end="{% endhighlight %}" keepend
+
+for s:type in g:liquid_highlight_types
+  exe 'syn match liquidTypeHighlight "\<'.matchstr(s:type,'[^=]*').'\>" contained'
+  exe 'syn region liquidHighlight'.substitute(matchstr(s:type,'[^=]*$'),'\..*','','').' start="{%\s*highlight\s\+'.matchstr(s:type,'[^=]*').'\s*%}" end="{% endhighlight %}" keepend contains=@liquidHighlight'.substitute(matchstr(s:type,'[^=]*$'),'\.','','g')
+endfor
+unlet! s:type
+
+syn region liquidString matchgroup=liquidQuote start=+"+ end=+"+ contained
+syn region liquidString matchgroup=liquidQuote start=+'+ end=+'+ contained
+syn match liquidNumber "-\=\<\d\+\>" contained
+syn match liquidFloat "-\=\<\d\+\>\.\.\@!\%(\d\+\>\)\=" contained
+syn keyword liquidBoolean true false contained
+syn keyword liquidNull null nil contained
+syn match liquidEmpty "\<empty\>" contained
+
+syn keyword liquidOperator and or not contained
+syn match liquidPipe '|' contained skipwhite nextgroup=liquidFilter
+
+syn keyword liquidFilter date capitalize downcase upcase first last join sort size strip_html strip_newlines newline_to_br replace replace_first remove remove_first truncate truncatewords prepend append minus plus times divided_by contained
+
+syn keyword liquidConditional if elsif else endif unless endunless case when endcase ifchanged endifchanged contained
+syn keyword liquidRepeat      for endfor tablerow endtablerow in contained
+syn match   liquidRepeat      "\%({%\s*\)\@<=empty\>" contained
+syn keyword liquidKeyword     assign cycle include with contained
+
+syn keyword liquidForloop forloop nextgroup=liquidForloopDot contained
+syn match liquidForloopDot "\." nextgroup=liquidForloopAttribute contained
+syn keyword liquidForloopAttribute length index index0 rindex rindex0 first last contained
+
+syn keyword liquidTablerowloop tablerowloop nextgroup=liquidTablerowloopDot contained
+syn match liquidTablerowloopDot "\." nextgroup=liquidTableForloopAttribute contained
+syn keyword liquidTablerowloopAttribute length index index0 col col0 index0 rindex rindex0 first last col_first col_last contained
+
+hi def link liquidDelimiter             PreProc
+hi def link liquidComment               Comment
+hi def link liquidTypeHighlight         Type
+hi def link liquidConditional           Conditional
+hi def link liquidRepeat                Repeat
+hi def link liquidKeyword               Keyword
+hi def link liquidOperator              Operator
+hi def link liquidString                String
+hi def link liquidQuote                 Delimiter
+hi def link liquidNumber                Number
+hi def link liquidFloat                 Float
+hi def link liquidEmpty                 liquidNull
+hi def link liquidNull                  liquidBoolean
+hi def link liquidBoolean               Boolean
+hi def link liquidFilter                Function
+hi def link liquidForloop               Identifier
+hi def link liquidForloopAttribute      Identifier
+
+let b:current_syntax = 'liquid'
+
+if exists('main_syntax') && main_syntax == 'liquid'
+  unlet main_syntax
+endif