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63 lines
1.9 KiB
VimL
63 lines
1.9 KiB
VimL
" Author: Antony Lee <anntzer.lee@gmail.com>
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" Description: Helper functions for reStructuredText syntax folding
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" Last Modified: 2018-12-29
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function s:CacheRstFold()
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if !g:rst_fold_enabled
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return
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endif
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let closure = {'header_types': {}, 'max_level': 0, 'levels': {}}
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function closure.Process(match) dict
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let curline = getcurpos()[1]
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if has_key(self.levels, curline - 1)
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" For over+under-lined headers, the regex will match both at the
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" overline and at the title itself; in that case, skip the second match.
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return
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endif
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let lines = split(a:match, '\n')
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let key = repeat(lines[-1][0], len(lines))
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if !has_key(self.header_types, key)
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let self.max_level += 1
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let self.header_types[key] = self.max_level
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endif
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let self.levels[curline] = self.header_types[key]
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endfunction
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let save_cursor = getcurpos()
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let save_mark = getpos("'[")
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silent keeppatterns %s/\v^%(%(([=`:.'"~^_*+#-])\1+\n)?.{1,2}\n([=`:.'"~^_*+#-])\2+)|%(%(([=`:.''"~^_*+#-])\3{2,}\n)?.{3,}\n([=`:.''"~^_*+#-])\4{2,})$/\=closure.Process(submatch(0))/gn
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call setpos('.', save_cursor)
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call setpos("'[", save_mark)
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let b:RstFoldCache = closure.levels
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endfunction
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function RstFold#GetRstFold()
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if !g:rst_fold_enabled
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return
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endif
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if !has_key(b:, 'RstFoldCache')
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call s:CacheRstFold()
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endif
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if has_key(b:RstFoldCache, v:lnum)
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return '>' . b:RstFoldCache[v:lnum]
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else
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return '='
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endif
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endfunction
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function RstFold#GetRstFoldText()
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if !g:rst_fold_enabled
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return
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endif
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if !has_key(b:, 'RstFoldCache')
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call s:CacheRstFold()
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endif
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let indent = repeat(' ', b:RstFoldCache[v:foldstart] - 1)
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let thisline = getline(v:foldstart)
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" For over+under-lined headers, skip the overline.
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let text = thisline =~ '^\([=`:.''"~^_*+#-]\)\1\+$' ? getline(v:foldstart + 1) : thisline
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return indent . text
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endfunction
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