129 lines
4.7 KiB
VimL
129 lines
4.7 KiB
VimL
let s:sigil = nr2char(31)
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let snipmate#legacy#sigil = s:sigil
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" Prepare snippet to be processed by s:BuildTabStops
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function! snipmate#legacy#process_snippet(snip) abort
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let snippet = a:snip
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let esc_bslash = '\%(\\\@<!\%(\\\\\)*\)\@<='
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if exists('b:snipmate_visual')
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let visual = substitute(b:snipmate_visual, "\n$", '', '')
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unlet b:snipmate_visual
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else
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let visual = ''
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endif
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let snippet = substitute(snippet, '\n\(\t\+\).\{-\}\zs{VISUAL}',
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\ substitute(escape(visual, '%\'), "\n", "\n\\\\1", 'g'), 'g')
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" Evaluate eval (`...`) expressions.
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" Backquotes prefixed with a backslash "\" are ignored.
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" And backslash can be escaped by doubling it.
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" Using a loop here instead of a regex fixes a bug with nested "\=".
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if stridx(snippet, '`') != -1
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let new = []
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let snip = split(snippet, esc_bslash . '`', 1)
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let isexp = 0
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for i in snip
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if isexp
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call add(new, substitute(eval(i), "\n\\%$", '', ''))
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else
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call add(new, i)
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endif
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let isexp = !isexp
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endfor
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let snippet = join(new, '')
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let snippet = substitute(snippet, "\r", "\n", 'g')
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let snippet = substitute(snippet, '\\`', "`", 'g')
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endif
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" Place all text after a colon in a tab stop after the tab stop
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" (e.g. "${#:foo}" becomes "${:foo}foo").
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" This helps tell the position of the tab stops later.
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let snippet = substitute(snippet, esc_bslash . '\$\({\d\+:\(.\{-}\)}\|{\d\+}\)', s:sigil . '\1\2', 'g')
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let snippet = substitute(snippet, esc_bslash . '\$\(\d\+\)', s:sigil . '\1', 'g')
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let snippet = substitute(snippet, esc_bslash . '\\\$', '$', 'g')
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let snippet = substitute(snippet, '\\\\', "\\", 'g')
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" Update the a:snip so that all the $# become the text after
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" the colon in their associated ${#}.
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" (e.g. "${1:foo}" turns all "$1"'s into "foo")
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let i = 0
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if snippet !~ s:sigil . '{0'
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let snippet .= s:sigil . '{0}'
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endif
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while snippet =~ s:sigil.'{'.i
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let s = matchstr(snippet, s:sigil . '{' . i . ':\zs.\{-}\ze}')
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if s != ''
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let snippet = substitute(snippet, s:sigil . i, s.'&', 'g')
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endif
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let i += 1
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endw
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if &et " Expand tabs to spaces if 'expandtab' is set.
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return substitute(snippet, '\t', repeat(' ', (&sts > 0) ? &sts : &sw), 'g')
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endif
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return snippet
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endfunction
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" Builds a list of a list of each tab stop in the snippet containing:
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" 1.) The tab stop's line number.
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" 2.) The tab stop's column number
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" (by getting the length of the string between the last "\n" and the
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" tab stop).
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" 3.) The length of the text after the colon for the current tab stop
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" (e.g. "${1:foo}" would return 3).
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" 4.) If the "${#:}" construct is given, another list containing all
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" the matches of "$#", to be replaced with the placeholder. This list is
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" composed the same way as the parent; the first item is the line number,
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" and the second is the column.
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function! snipmate#legacy#build_stops(snip, lnum, col, indent) abort
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let stops = {}
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let i = 0
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let withoutVars = substitute(a:snip, s:sigil . '\d\+', '', 'g')
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while a:snip =~ s:sigil . '{' . i
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let beforeTabStop = matchstr(withoutVars, '^.*\ze'.s:sigil .'{'.i.'\D')
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let withoutOthers = substitute(withoutVars, ''.s:sigil .'{\('.i.'\D\)\@!\d\+.\{-}}', '', 'g')
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let stops[i] = {}
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let stops[i].line = a:lnum + s:count(beforeTabStop, "\n")
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let stops[i].col = a:indent + len(matchstr(withoutOthers, '.*\(\n\|^\)\zs.*\ze'.s:sigil .'{'.i.'\D'))
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let stops[i].placeholder = 0
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let stops[i].mirrors = []
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if stops[i].line == a:lnum
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let stops[i].col += a:col
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endif
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" Get all $# matches in another list, if ${#:name} is given
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if withoutVars =~ printf('%s{%d:', s:sigil, i)
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let stops[i].placeholder = len(matchstr(withoutVars, ''.s:sigil .'{'.i.':\zs.\{-}\ze}'))
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let withoutOthers = substitute(a:snip, ''.s:sigil .'{\d\+.\{-}}\|'.s:sigil .''.i.'\@!\d\+', '', 'g')
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while match(withoutOthers, ''.s:sigil .''.i.'\(\D\|$\)') != -1
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let stops[i].mirrors = get(stops[i], 'mirrors', [])
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let beforeMark = matchstr(withoutOthers,
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\ printf('^.\{-}\ze%s%s%d\(\D\|$\)',
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\ repeat('.', stops[i].placeholder), s:sigil, i))
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let line = a:lnum + s:count(beforeMark, "\n")
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let col = a:indent + (line > a:lnum
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\ ? len(matchstr(beforeMark, '.*\n\zs.*'))
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\ : a:col + len(beforeMark))
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call add(stops[i].mirrors, { 'line' : line, 'col' : col })
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let withoutOthers = substitute(withoutOthers, ''.s:sigil .''.i.'\ze\(\D\|$\)', '', '')
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endw
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endif
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let i += 1
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endw
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let stops[i] = stops[0]
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return [stops, i + 1]
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endfunction
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" Counts occurences of haystack in needle
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function! s:count(haystack, needle) abort
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let counter = 0
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let index = stridx(a:haystack, a:needle)
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while index != -1
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let index = stridx(a:haystack, a:needle, index+1)
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let counter += 1
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endw
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return counter
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endfunction
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