433 lines
14 KiB
Text
433 lines
14 KiB
Text
fun! Filename(...)
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let filename = expand('%:t:r')
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if filename == '' | return a:0 == 2 ? a:2 : '' | endif
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return !a:0 || a:1 == '' ? filename : substitute(a:1, '$1', filename, 'g')
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endf
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fun s:RemoveSnippet()
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unl! g:snipPos s:curPos s:snipLen s:endCol s:endLine s:prevLen
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\ s:lastBuf s:oldWord
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if exists('s:update')
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unl s:startCol s:origWordLen s:update
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if exists('s:oldVars') | unl s:oldVars s:oldEndCol | endif
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endif
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aug! snipMateAutocmds
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endf
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fun snipMate#expandSnip(snip, col)
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let lnum = line('.') | let col = a:col
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let snippet = s:ProcessSnippet(a:snip)
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" Avoid error if eval evaluates to nothing
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if snippet == '' | return '' | endif
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" Expand snippet onto current position with the tab stops removed
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let snipLines = split(substitute(snippet, '$\d\+\|${\d\+.\{-}}', '', 'g'), "\n", 1)
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let line = getline(lnum)
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let afterCursor = strpart(line, col - 1)
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" Keep text after the cursor
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if afterCursor != "\t" && afterCursor != ' '
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let line = strpart(line, 0, col - 1)
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let snipLines[-1] .= afterCursor
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else
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let afterCursor = ''
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" For some reason the cursor needs to move one right after this
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if line != '' && col == 1 && &ve != 'all' && &ve != 'onemore'
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let col += 1
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endif
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endif
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call setline(lnum, line.snipLines[0])
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" Autoindent snippet according to previous indentation
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let indent = matchend(line, '^.\{-}\ze\(\S\|$\)') + 1
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call append(lnum, map(snipLines[1:], "'".strpart(line, 0, indent - 1)."'.v:val"))
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" Open any folds snippet expands into
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if &fen | sil! exe lnum.','.(lnum + len(snipLines) - 1).'foldopen' | endif
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let [g:snipPos, s:snipLen] = s:BuildTabStops(snippet, lnum, col - indent, indent)
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if s:snipLen
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aug snipMateAutocmds
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au CursorMovedI * call s:UpdateChangedSnip(0)
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au InsertEnter * call s:UpdateChangedSnip(1)
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aug END
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let s:lastBuf = bufnr(0) " Only expand snippet while in current buffer
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let s:curPos = 0
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let s:endCol = g:snipPos[s:curPos][1]
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let s:endLine = g:snipPos[s:curPos][0]
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call cursor(g:snipPos[s:curPos][0], g:snipPos[s:curPos][1])
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let s:prevLen = [line('$'), col('$')]
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if g:snipPos[s:curPos][2] != -1 | return s:SelectWord() | endif
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else
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unl g:snipPos s:snipLen
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" Place cursor at end of snippet if no tab stop is given
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let newlines = len(snipLines) - 1
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call cursor(lnum + newlines, indent + len(snipLines[-1]) - len(afterCursor)
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\ + (newlines ? 0: col - 1))
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endif
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return ''
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endf
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" Prepare snippet to be processed by s:BuildTabStops
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fun s:ProcessSnippet(snip)
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let snippet = a:snip
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" Evaluate eval (`...`) expressions.
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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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while match(snippet, '`.\{-}`') != -1
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let snippet = substitute(snippet, '`.\{-}`',
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\ substitute(eval(matchstr(snippet, '`\zs.\{-}\ze`')),
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\ "\n\\%$", '', ''), '')
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endw
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let snippet = substitute(snippet, "\r", "\n", 'g')
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endif
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" Place all text after a colon in a tab stop after the tab stop
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" (e.g. "${#:foo}" becomes "${:foo}foo").
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" This helps tell the position of the tab stops later.
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let snippet = substitute(snippet, '${\d\+:\(.\{-}\)}', '&\1', '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 "$1"'s into "foo")
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let i = 1
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while stridx(snippet, '${'.i) != -1
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let s = matchstr(snippet, '${'.i.':\zs.\{-}\ze}')
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if s != ''
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let snippet = substitute(snippet, '$'.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 ? &sts : &sw), 'g')
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endif
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return snippet
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endf
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" Counts occurences of haystack in needle
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fun s:Count(haystack, needle)
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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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endf
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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. "${1:foo}" would return 3). If there is no text, -1 is returned.
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" 4.) If the "${#:}" construct is given, another list containing all
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" the matches of "$#", to be replaced with the placeholder. This list is
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" composed the same way as the parent; the first item is the line number,
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" and the second is the column.
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fun s:BuildTabStops(snip, lnum, col, indent)
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let snipPos = []
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let i = 1
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let withoutVars = substitute(a:snip, '$\d\+', '', 'g')
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while stridx(a:snip, '${'.i) != -1
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let beforeTabStop = matchstr(withoutVars, '^.*\ze${'.i.'\D')
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let withoutOthers = substitute(withoutVars, '${\('.i.'\D\)\@!\d\+.\{-}}', '', 'g')
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let j = i - 1
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call add(snipPos, [0, 0, -1])
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let snipPos[j][0] = a:lnum + s:Count(beforeTabStop, "\n")
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let snipPos[j][1] = a:indent + len(matchstr(withoutOthers, '.*\(\n\|^\)\zs.*\ze${'.i.'\D'))
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if snipPos[j][0] == a:lnum | let snipPos[j][1] += a:col | endif
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" Get all $# matches in another list, if ${#:name} is given
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if stridx(withoutVars, '${'.i.':') != -1
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let snipPos[j][2] = len(matchstr(withoutVars, '${'.i.':\zs.\{-}\ze}'))
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let dots = repeat('.', snipPos[j][2])
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call add(snipPos[j], [])
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let withoutOthers = substitute(a:snip, '${\d\+.\{-}}\|$'.i.'\@!\d\+', '', 'g')
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while match(withoutOthers, '$'.i.'\(\D\|$\)') != -1
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let beforeMark = matchstr(withoutOthers, '^.\{-}\ze'.dots.'$'.i.'\(\D\|$\)')
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call add(snipPos[j][3], [0, 0])
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let snipPos[j][3][-1][0] = a:lnum + s:Count(beforeMark, "\n")
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let snipPos[j][3][-1][1] = a:indent + (snipPos[j][3][-1][0] > a:lnum
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\ ? len(matchstr(beforeMark, '.*\n\zs.*'))
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\ : a:col + len(beforeMark))
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let withoutOthers = substitute(withoutOthers, '$'.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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return [snipPos, i - 1]
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endf
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fun snipMate#jumpTabStop(backwards)
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let leftPlaceholder = exists('s:origWordLen')
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\ && s:origWordLen != g:snipPos[s:curPos][2]
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if leftPlaceholder && exists('s:oldEndCol')
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let startPlaceholder = s:oldEndCol + 1
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endif
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if exists('s:update')
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call s:UpdatePlaceholderTabStops()
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else
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call s:UpdateTabStops()
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endif
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" Don't reselect placeholder if it has been modified
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if leftPlaceholder && g:snipPos[s:curPos][2] != -1
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if exists('startPlaceholder')
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let g:snipPos[s:curPos][1] = startPlaceholder
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else
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let g:snipPos[s:curPos][1] = col('.')
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let g:snipPos[s:curPos][2] = 0
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endif
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endif
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let s:curPos += a:backwards ? -1 : 1
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" Loop over the snippet when going backwards from the beginning
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if s:curPos < 0 | let s:curPos = s:snipLen - 1 | endif
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if s:curPos == s:snipLen
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let sMode = s:endCol == g:snipPos[s:curPos-1][1]+g:snipPos[s:curPos-1][2]
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call s:RemoveSnippet()
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return sMode ? "\<tab>" : TriggerSnippet()
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endif
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call cursor(g:snipPos[s:curPos][0], g:snipPos[s:curPos][1])
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let s:endLine = g:snipPos[s:curPos][0]
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let s:endCol = g:snipPos[s:curPos][1]
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let s:prevLen = [line('$'), col('$')]
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return g:snipPos[s:curPos][2] == -1 ? '' : s:SelectWord()
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endf
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fun s:UpdatePlaceholderTabStops()
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let changeLen = s:origWordLen - g:snipPos[s:curPos][2]
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unl s:startCol s:origWordLen s:update
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if !exists('s:oldVars') | return | endif
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" Update tab stops in snippet if text has been added via "$#"
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" (e.g., in "${1:foo}bar$1${2}").
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if changeLen != 0
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let curLine = line('.')
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for pos in g:snipPos
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if pos == g:snipPos[s:curPos] | continue | endif
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let changed = pos[0] == curLine && pos[1] > s:oldEndCol
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let changedVars = 0
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let endPlaceholder = pos[2] - 1 + pos[1]
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" Subtract changeLen from each tab stop that was after any of
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" the current tab stop's placeholders.
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for [lnum, col] in s:oldVars
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if lnum > pos[0] | break | endif
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if pos[0] == lnum
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if pos[1] > col || (pos[2] == -1 && pos[1] == col)
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let changed += 1
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elseif col < endPlaceholder
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let changedVars += 1
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endif
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endif
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endfor
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let pos[1] -= changeLen * changed
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let pos[2] -= changeLen * changedVars " Parse variables within placeholders
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" e.g., "${1:foo} ${2:$1bar}"
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if pos[2] == -1 | continue | endif
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" Do the same to any placeholders in the other tab stops.
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for nPos in pos[3]
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let changed = nPos[0] == curLine && nPos[1] > s:oldEndCol
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for [lnum, col] in s:oldVars
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if lnum > nPos[0] | break | endif
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if nPos[0] == lnum && nPos[1] > col
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let changed += 1
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endif
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endfor
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let nPos[1] -= changeLen * changed
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endfor
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endfor
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endif
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unl s:endCol s:oldVars s:oldEndCol
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endf
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fun s:UpdateTabStops()
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let changeLine = s:endLine - g:snipPos[s:curPos][0]
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let changeCol = s:endCol - g:snipPos[s:curPos][1]
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if exists('s:origWordLen')
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let changeCol -= s:origWordLen
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unl s:origWordLen
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endif
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let lnum = g:snipPos[s:curPos][0]
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let col = g:snipPos[s:curPos][1]
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" Update the line number of all proceeding tab stops if <cr> has
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" been inserted.
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if changeLine != 0
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let changeLine -= 1
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for pos in g:snipPos
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if pos[0] >= lnum
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if pos[0] == lnum | let pos[1] += changeCol | endif
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let pos[0] += changeLine
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endif
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if pos[2] == -1 | continue | endif
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for nPos in pos[3]
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if nPos[0] >= lnum
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if nPos[0] == lnum | let nPos[1] += changeCol | endif
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let nPos[0] += changeLine
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endif
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endfor
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endfor
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elseif changeCol != 0
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" Update the column of all proceeding tab stops if text has
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" been inserted/deleted in the current line.
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for pos in g:snipPos
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if pos[1] >= col && pos[0] == lnum
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let pos[1] += changeCol
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endif
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if pos[2] == -1 | continue | endif
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for nPos in pos[3]
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if nPos[0] > lnum | break | endif
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if nPos[0] == lnum && nPos[1] >= col
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let nPos[1] += changeCol
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endif
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endfor
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endfor
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endif
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endf
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fun s:SelectWord()
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let s:origWordLen = g:snipPos[s:curPos][2]
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let s:oldWord = strpart(getline('.'), g:snipPos[s:curPos][1] - 1,
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\ s:origWordLen)
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let s:prevLen[1] -= s:origWordLen
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if !empty(g:snipPos[s:curPos][3])
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let s:update = 1
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let s:endCol = -1
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let s:startCol = g:snipPos[s:curPos][1] - 1
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endif
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if !s:origWordLen | return '' | endif
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let l = col('.') != 1 ? 'l' : ''
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if &sel == 'exclusive'
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return "\<esc>".l.'v'.s:origWordLen."l\<c-g>"
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endif
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return s:origWordLen == 1 ? "\<esc>".l.'gh'
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\ : "\<esc>".l.'v'.(s:origWordLen - 1)."l\<c-g>"
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endf
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" This updates the snippet as you type when text needs to be inserted
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" into multiple places (e.g. in "${1:default text}foo$1bar$1",
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" "default text" would be highlighted, and if the user types something,
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" UpdateChangedSnip() would be called so that the text after "foo" & "bar"
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" are updated accordingly)
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"
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" It also automatically quits the snippet if the cursor is moved out of it
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" while in insert mode.
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fun s:UpdateChangedSnip(entering)
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if exists('g:snipPos') && bufnr(0) != s:lastBuf
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call s:RemoveSnippet()
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elseif exists('s:update') " If modifying a placeholder
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if !exists('s:oldVars') && s:curPos + 1 < s:snipLen
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" Save the old snippet & word length before it's updated
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" s:startCol must be saved too, in case text is added
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" before the snippet (e.g. in "foo$1${2}bar${1:foo}").
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let s:oldEndCol = s:startCol
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let s:oldVars = deepcopy(g:snipPos[s:curPos][3])
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endif
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let col = col('.') - 1
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if s:endCol != -1
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let changeLen = col('$') - s:prevLen[1]
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let s:endCol += changeLen
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else " When being updated the first time, after leaving select mode
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if a:entering | return | endif
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let s:endCol = col - 1
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endif
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" If the cursor moves outside the snippet, quit it
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if line('.') != g:snipPos[s:curPos][0] || col < s:startCol ||
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\ col - 1 > s:endCol
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unl! s:startCol s:origWordLen s:oldVars s:update
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return s:RemoveSnippet()
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endif
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call s:UpdateVars()
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let s:prevLen[1] = col('$')
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elseif exists('g:snipPos')
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if !a:entering && g:snipPos[s:curPos][2] != -1
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let g:snipPos[s:curPos][2] = -2
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endif
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let col = col('.')
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let lnum = line('.')
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let changeLine = line('$') - s:prevLen[0]
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if lnum == s:endLine
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let s:endCol += col('$') - s:prevLen[1]
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let s:prevLen = [line('$'), col('$')]
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endif
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if changeLine != 0
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let s:endLine += changeLine
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let s:endCol = col
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endif
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" Delete snippet if cursor moves out of it in insert mode
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if (lnum == s:endLine && (col > s:endCol || col < g:snipPos[s:curPos][1]))
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\ || lnum > s:endLine || lnum < g:snipPos[s:curPos][0]
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call s:RemoveSnippet()
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endif
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endif
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endf
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" This updates the variables in a snippet when a placeholder has been edited.
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" (e.g., each "$1" in "${1:foo} $1bar $1bar")
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fun s:UpdateVars()
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let newWordLen = s:endCol - s:startCol + 1
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let newWord = strpart(getline('.'), s:startCol, newWordLen)
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if newWord == s:oldWord || empty(g:snipPos[s:curPos][3])
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return
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endif
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let changeLen = g:snipPos[s:curPos][2] - newWordLen
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let curLine = line('.')
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let startCol = col('.')
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let oldStartSnip = s:startCol
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let updateTabStops = changeLen != 0
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let i = 0
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for [lnum, col] in g:snipPos[s:curPos][3]
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if updateTabStops
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let start = s:startCol
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if lnum == curLine && col <= start
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let s:startCol -= changeLen
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let s:endCol -= changeLen
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endif
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for nPos in g:snipPos[s:curPos][3][(i):]
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" This list is in ascending order, so quit if we've gone too far.
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if nPos[0] > lnum | break | endif
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if nPos[0] == lnum && nPos[1] > col
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let nPos[1] -= changeLen
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endif
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endfor
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if lnum == curLine && col > start
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let col -= changeLen
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let g:snipPos[s:curPos][3][i][1] = col
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endif
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let i += 1
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endif
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" "Very nomagic" is used here to allow special characters.
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call setline(lnum, substitute(getline(lnum), '\%'.col.'c\V'.
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\ escape(s:oldWord, '\'), escape(newWord, '\&'), ''))
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endfor
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if oldStartSnip != s:startCol
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call cursor(0, startCol + s:startCol - oldStartSnip)
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endif
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let s:oldWord = newWord
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let g:snipPos[s:curPos][2] = newWordLen
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endf
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" vim:noet:sw=4:ts=4:ft=vim
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