Add csv plugin, closes #239

1 files changed, 173 insertions, 0 deletions

diff --git a/syntax/csv.vim b/syntax/csv.vim
new file mode 100644
index 00000000..848e2218
--- /dev/null
+++ b/syntax/csv.vim
@@ -0,0 +1,173 @@
+if exists('g:polyglot_disabled') && index(g:polyglot_disabled, 'csv') != -1
+  finish
+endif
+
+" A simple syntax highlighting, simply alternate colors between two
+" adjacent columns
+" Init {{{2
+let s:cpo_save = &cpo
+set cpo&vim
+
+scriptencoding utf8
+if version < 600
+    syn clear
+elseif exists("b:current_syntax")
+    finish
+endif
+
+" Helper functions "{{{2
+fu! <sid>Warning(msg) "{{{3
+    " Don't redraw, so we are not overwriting messages from the ftplugin
+    " script
+    echohl WarningMsg
+    echomsg "CSV Syntax:" . a:msg
+    echohl Normal
+endfu
+
+fu! <sid>Esc(val, char) "{{{3 
+    if empty(a:val)
+        return a:val
+    endif
+    return '\V'.escape(a:val, '\\'.a:char).'\m'
+endfu
+
+fu! <sid>CheckSaneSearchPattern() "{{{3
+    let s:del_def = ','
+    let s:col_def = '\%([^' . s:del_def . ']*' . s:del_def . '\|$\)'
+    let s:col_def_end = '\%([^' . s:del_def . ']*' . s:del_def . '\)'
+
+    " First: 
+    " Check for filetype plugin. This syntax script relies on the filetype
+    " plugin, else, it won't work properly.
+    redir => s:a |sil filetype | redir end
+    let s:a=split(s:a, "\n")[0]
+    if match(s:a, '\cplugin:off') > 0
+        call <sid>Warning("No filetype support, only simple highlighting using"
+        \ . s:del_def . " as delimiter! See :h csv-installation")
+    endif
+
+    " Check Comment setting
+    if !exists("g:csv_comment")
+        let b:csv_cmt = split(&cms, '%s')
+    elseif match(g:csv_comment, '%s') >= 0
+        let b:csv_cmt = split(g:csv_comment, '%s')
+    else
+        let b:csv_cmt = [g:csv_comment]
+    endif
+
+
+    " Second: Check for sane defaults for the column pattern
+    " Not necessary to check for fixed width columns
+    if exists("b:csv_fixed_width_cols")
+        return
+    endif
+
+
+    " Try a simple highlighting, if the defaults from the ftplugin
+    " don't exist
+    let s:col  = get(b:, 'col', s:col_def)
+    let s:col_end  = get(b:, 'col_end', s:col_def_end)
+    let s:del  = get(b:, 'delimiter', s:del_def)
+    let s:cmts = b:csv_cmt[0]
+    let s:cmte = len(b:csv_cmt) == 2 ? b:csv_cmt[1] : ''
+    " Make the file start at the first actual CSV record (issue #71)
+    if !exists("b:csv_headerline")
+        let cmts    = <sid>Esc(s:cmts, '')
+        let pattern = '\%^\(\%('.cmts.'.*\n\)\|\%(\s*\n\)\)\+'
+        let start = search(pattern, 'nWe', 10)
+        " don't do it, on an empty file
+        if start > 0 && !empty(getline(start))
+            let b:csv_headerline = start+1
+        endif
+    endif
+    " escape '/' for syn match command
+    let s:cmts=<sid>Esc(s:cmts, '/')
+    let s:cmte=<sid>Esc(s:cmte, '/')
+
+    if line('$') > 1 && (!exists("b:col") || empty(b:col))
+        " check for invalid pattern, ftplugin hasn't been loaded yet
+        call <sid>Warning("Invalid column pattern, using default pattern " . s:col_def)
+    endif
+endfu
+
+" Syntax rules {{{2
+fu! <sid>DoHighlight() "{{{3
+    if has("conceal") && !exists("g:csv_no_conceal") &&
+        \ !exists("b:csv_fixed_width_cols")
+        exe "syn match CSVDelimiter /" . s:col_end . 
+            \ '/ms=e,me=e contained conceal cchar=' .
+            \ (&enc == "utf-8" ? "│" : '|')
+        hi def link CSVDelimiter Conceal
+    elseif !exists("b:csv_fixed_width_cols")
+    " The \%(.\)\@<= makes sure, the last char won't be concealed,
+    " if it isn't a delimiter
+        exe "syn match CSVDelimiter /" . s:col_end . '/ms=e,me=e contained'
+        if has("conceal")
+            hi def link CSVDelimiter Conceal
+        else
+            hi def link CSVDelimiter Ignore
+        endif
+    endif " There is no delimiter for csv fixed width columns
+
+    if !exists("b:csv_fixed_width_cols")
+        exe 'syn match CSVColumnEven nextgroup=CSVColumnOdd /'
+            \ . s:col . '/ contains=CSVDelimiter'
+        exe 'syn match CSVColumnOdd nextgroup=CSVColumnEven /'
+            \ . s:col . '/ contains=CSVDelimiter'
+        exe 'syn match CSVColumnHeaderEven nextgroup=CSVColumnHeaderOdd /\%<'. (get(b:, 'csv_headerline', 1)+1).'l'
+            \. s:col . '/ contains=CSVDelimiter'
+        exe 'syn match CSVColumnHeaderOdd nextgroup=CSVColumnHeaderEven /\%<'. (get(b:, 'csv_headerline', 1)+1).'l'
+            \. s:col . '/ contains=CSVDelimiter'
+    else
+        for i in range(len(b:csv_fixed_width_cols))
+            let pat = '/\%' . b:csv_fixed_width_cols[i] . 'v.*' .
+                \ ((i == len(b:csv_fixed_width_cols)-1) ? '/' : 
+                \ '\%' . b:csv_fixed_width_cols[i+1] . 'v/')
+
+            let group  = "CSVColumn" . (i%2 ? "Odd"  : "Even" )
+            let ngroup = "CSVColumn" . (i%2 ? "Even" : "Odd"  )
+            exe "syn match " group pat " nextgroup=" . ngroup
+        endfor
+    endif
+    " Comment regions
+    exe 'syn match CSVComment /'. s:cmts. '.*'.
+        \ (!empty(s:cmte) ? '\%('. s:cmte. '\)\?'
+        \: '').  '/'
+    hi def link CSVComment Comment
+endfun
+
+fu! <sid>HiLink(name, target) "{{{3
+    if !hlexists(a:name)
+        exe "hi def link" a:name a:target
+    endif
+endfu
+
+fu! <sid>DoSyntaxDefinitions() "{{{3
+    syn spell toplevel
+    " Not really needed
+    syn case ignore
+    call <sid>HiLink("CSVColumnHeaderOdd", "WarningMsg")
+    call <sid>HiLink("CSVColumnHeaderEven", "WarningMsg")
+    if get(g:, 'csv_no_column_highlight', 0)
+        call <sid>HiLink("CSVColumnOdd", "Normal")
+        call <sid>HiLink("CSVColumnEven", "Normal")
+    else
+        call <sid>HiLink("CSVColumnOdd", "String")
+        call <sid>HiLink("CSVColumnEven","Statement")
+    endif
+endfun
+
+" Main: {{{2 
+" Make sure, we are using a sane, valid pattern for syntax
+" highlighting
+call <sid>CheckSaneSearchPattern()
+" Define all necessary syntax groups
+call <sid>DoSyntaxDefinitions()
+" Highlight the file
+call <sid>DoHighlight()
+" Set the syntax variable {{{2
+let b:current_syntax="csv"
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
+" vim: set foldmethod=marker et sw=0 sts=-1 ts=4: