mirror of
https://github.com/sheerun/vim-polyglot.git
synced 2025-11-08 11:33:52 -05:00
132 lines
3.4 KiB
VimL
132 lines
3.4 KiB
VimL
if polyglot#init#is_disabled(expand('<sfile>:p'), 'svelte', 'ftplugin/svelte/fold.vim')
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finish
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endif
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"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
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"
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" Config {{{
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"
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"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
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let s:use_foldexpr = exists("g:vim_svelte_plugin_use_foldexpr")
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\ && g:vim_svelte_plugin_use_foldexpr == 1
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"}}}
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if !s:use_foldexpr | finish | endif
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"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
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"
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" Settings {{{
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"
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"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
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setlocal foldmethod=expr
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setlocal foldexpr=GetSvelteFold(v:lnum)
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"}}}
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"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
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"
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" Variables {{{
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"
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"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
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let s:empty_line = '\v^\s*$'
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let s:block_end = '\v^\s*}|]|\)'
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let s:svelte_tag_start = '\v^\<\w+'
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let s:svelte_tag_end = '\v^\<\/\w+'
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let s:svelte_internal_blocks = '\v:(else|then|catch)'
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"}}}
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"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
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"
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" Functions {{{
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"
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"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
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" see :h fold-expr
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" value meaning
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" 0 the line is not in a fold
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" 1, 2, .. the line is in a fold with this level
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" -1 the fold level is undefined, use the fold level of a
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" line before or after this line, whichever is the
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" lowest.
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" "=" use fold level from the previous line
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" "a1", "a2", .. add one, two, .. to the fold level of the previous
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" line, use the result for the current line
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" "s1", "s2", .. subtract one, two, .. from the fold level of the
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" previous line, use the result for the next line
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" ">1", ">2", .. a fold with this level starts at this line
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" "<1", "<2", .. a fold with this level ends at this line
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function! GetSvelteFold(lnum)
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let this_line = getline(a:lnum)
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let next_line = getline(a:lnum + 1)
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" Handle empty lines
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if this_line =~ s:empty_line
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return -1
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endif
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" Handle start/end tags
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if this_line =~ s:svelte_tag_start
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return '>1'
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endif
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if this_line =~ s:svelte_tag_end
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" If return '<1', fold will get incorrect with prev line
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return 1
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endif
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" Fold by indent
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if a:lnum > 1
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let prev_indent = s:IndentLevel(a:lnum - 1)
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else
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let prev_indent = 0
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endif
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let this_indent = s:IndentLevel(a:lnum)
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let next_indent = s:IndentLevel(s:NextNonBlankLine(a:lnum))
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" Fold separately on blocks
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if this_line =~ s:svelte_internal_blocks
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return '>'.next_indent
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endif
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if GetSvelteTag(a:lnum) == 'script'
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" Handle closing '}'
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if this_line =~ '\v^\s*},?\s*$'
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return '<'.prev_indent
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endif
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" --this
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" ----next
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if this_indent < next_indent
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return '>'.next_indent
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endif
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" ----this
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" --next
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if this_indent >= next_indent
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return this_indent
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endif
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else
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" Template or style
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return this_indent
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endif
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endfunction
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function! s:IndentLevel(lnum)
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" Add 1 to indentLevel, so start/end tags can fold properly
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return indent(a:lnum) / &shiftwidth + 1
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endfunction
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function! s:NextNonBlankLine(lnum)
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let next_line = a:lnum + 1
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let last_line = line('$')
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while next_line <= last_line
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if getline(next_line) =~ '\v\S'
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return next_line
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endif
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let next_line += 1
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endwhile
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return 0
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endfunction
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"}}}
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" vim: fdm=marker
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