Files
delimitMate/autoload/delimitMate.vim
Israel Chauca Fuentes c4d51a21b3 Refactor pairs handling
2017-04-01 18:14:12 -04:00

589 lines
20 KiB
VimL

" Script variables {{{1
let s:defaults = {}
let s:defaults.enabled = 1
let s:defaults.pairs = ['()', '[]', '{}']
let s:defaults.quotes = ['"', "'", '`']
let s:defaults.debug = 0
let s:defaults.autoclose = 1
let s:defaults.expand_space = 0
let s:defaults.expand_cr = 0
let s:defaults.jump_expansion = 0
let s:defaults.jump_next = 1
let s:defaults.jump_long = 0
let s:defaults.insert_eol_marker = 0
let s:defaults.eol_marker = ';'
let s:defaults.expand_inside_quotes = 0
let s:defaults.smart_pairs = 1
let s:defaults.smart_pairs_extra = []
let s:defaults.balance_pairs = 0
let s:defaults.nesting_quotes = []
let s:defaults.smart_quotes = 1
let s:defaults.smart_quotes_extra = []
let s:defaults.excluded_regions = []
" Set smart_pairs expressions:
let s:exprs = []
call add(s:exprs, 'next_char =~# "\\w"')
call add(s:exprs, 'next_char =~# "[".escape(v:char,"\\^]")."€£$]"')
call add(s:exprs,
\'next_char =~# "[".escape(join(s:option("quotes"),""),"\\^]")."]"')
call add(s:exprs, 'ahead =~# "^[^[:space:][:punct:]]"')
let s:defaults.smart_pairs_base = s:exprs
" Set smart_quotes expressions:
let s:exprs = []
call add(s:exprs, 'prev_char =~# "\\w"')
call add(s:exprs, 'prev_char =~# "[^[:space:][:punct:]"
\.escape(join(options.quotes, ""), "\\^[]")."]"')
call add(s:exprs, 'next_char =~# "\\w"')
call add(s:exprs, 'char == "\"" && &filetype =~? "\\<vim\\>"
\&& line =~ "^\\s*$"')
call add(s:exprs, 'next_char =~# "[^[:space:][:punct:]"
\. escape(join(options.quotes, ""), "\\^[]")."]"')
" Balance quotes
call add(s:exprs, 'strchars(substitute(substitute(a:info.cur.line,
\"\\\\.", "", "g"), "[^".escape(char, "\\^[]")."]", "", "g")) % 2')
let s:defaults.smart_quotes_base = s:exprs
unlet s:exprs
let s:info = {}
let s:info.char = ''
let s:info.nesting = 0
let s:info.skip_icp = 0
let s:info.is_ignored_syn = 0
let s:info.template = {}
function! s:debug(debug_level, ...) "{{{1
if get(b:, 'delimitMate_debug',
\ get(g:, 'delimitMate_debug',
\ get(s:defaults, 'debug', 0)))
let trail = expand('<sfile>')
let trail = substitute(trail, '\%(\.\.<SNR>\d\+_debug\)\+$', '', '')
let trail = substitute(trail, '<SNR>\d\+_', '', 'g')
let trail = substitute(trail, '\.\.', '.', 'g')
let trail = substitute(trail, '^function\s\+\%(delimitMate\)\?', '', '')
let message = get(a:, 1, '')
echom printf('%s: %s', trail, message)
endif
endfunction
command! -nargs=* -count=3 DMDebug call s:debug(<count>, <args>)
function! s:defaults.consolidate() "{{{1
3DMDebug 'Consolidate options'
let g = filter(copy(g:), 'v:key =~# "^delimitMate_"')
let b = filter(copy(b:), 'v:key =~# "^delimitMate_"')
call extend(g, b, 'force')
let short_options = {}
call map(g, 'extend(short_options,
\{substitute(v:key, "^delimitMate_", "", ""): v:val}, "force")')
call extend(short_options, self, 'keep')
return short_options
endfunction
function! s:info.update() "{{{1
let self.prev = get(self, 'cur', {})
let d = {}
let d.line = getline('.')
let d.col = col('.')
let d.lnum = line('.')
let d.prev_line = line('.') == 1 ? '' : getline(line('.') - 1)
let d.next_line = line('.') == line('$') ? '' : getline(line('.') + 1)
let d.ahead = len(d.line) >= d.col ? d.line[d.col - 1 : ] : ''
let d.behind = d.col >= 2 ? d.line[: d.col - 2] : ''
let d.prev_char = strcharpart(d.behind, strchars(d.behind) - 1, 1)
let d.next_char = strcharpart(d.ahead, 0, 1)
let d.around = d.prev_char . d.next_char
call extend(d, s:info.template, 'keep')
1DMDebug printf('lnum: %s, col: %s, prev_char: %s, next_char: %s',
\ d.lnum, d.col, string(d.prev_char), string(d.next_char))
1DMDebug printf("behind: %s", d.behind)
1DMDebug printf("ahead : %s", d.ahead )
1DMDebug printf("prev_line: %s", d.prev_line)
1DMDebug printf('cur_line : %s', d.line)
1DMDebug printf('next_line: %s', d.next_line)
let self.cur = d
return d
endfunction
function! s:balance_pairs(pair, info, opts) "{{{1
let left = strcharpart(a:pair, 0, 1)
let right = strcharpart(a:pair, 1, 1)
let pat = '[^' . escape(a:pair, '\^[]') . ']'
let behind = substitute(a:info.cur.behind, '\\.', '', 'g')
let behind = matchstr(behind, '['.escape(left, '\^[]').'].*')
let behind = substitute(behind, pat, '', 'g')
let ahead = substitute(a:info.cur.ahead, '\\.', '', 'g')
let ahead = matchstr(ahead, '^.*['.escape(right, '\^[]').']')
let ahead = substitute(ahead, pat, '', 'g')
let lefts = 0
let rights = 0
for char in split(behind, '\zs')
if char ==# left
let lefts += 1
elseif char ==# right
let rights += rights < lefts
endif
endfor
let balance1 = lefts - rights
let lefts = 0
let rights = 0
let balance2 = 0
for char in split(ahead, '\zs')
if char ==# left
let lefts += 1
elseif char ==# right
let rights += 1
endif
if lefts < rights
let balance2 -= 1
let lefts = 0
let rights = 0
endif
endfor
3DMDebug balance1 + balance2
return balance1 + balance2
endfunction
function! s:info.template.is_escaped(...) "{{{1
3DMDebug
let str = a:0 ? a1 : self.behind
return len(matchstr(str, '\\*$')) % 2
endfunction
function! s:option(name) "{{{1
3DMDebug
let opt = get(b:, 'delimitMate_' . a:name,
\ get(g:, 'delimitMate_' . a:name,
\ get(s:defaults, a:name, '')))
3DMDebug printf('%s: %s', a:name, string(opt))
if type(opt) == 3 || type(opt) == 4
return copy(opt)
endif
return opt
endfunction
function! s:synstack(lnum, col) "{{{1
3DMDebug
return map(synstack(a:lnum, a:col), 'synIDattr(v:val, "name")')
\+ [synIDattr(synIDtrans(synID(line('.'), col('.'), 1)), 'name')]
endfunction
function! s:any_is_true(expressions, info, options) "{{{1
let char = a:info.char
let info = deepcopy(a:info)
let options = deepcopy(a:options)
let line = info.cur.line
let lnum = info.cur.lnum
let col = info.cur.col
let behind = info.cur.behind
let ahead = info.cur.ahead
let prev_char = info.cur.prev_char
let next_char = info.cur.next_char
let exprs = copy(a:expressions)
call filter(exprs, 'eval(v:val)')
3DMDebug string(exprs)
return !empty(exprs)
endfunction
function! s:rights2jump_pair(char, pair, info, opts, go_next) "{{{1
" TODO consider escaped characters
let go_next = a:go_next
\ && empty(a:info.cur.ahead)
\ && a:info.cur.next_line =~# '^\s*['.escape(a:char, '[]^-\').']'
let line = a:info.cur.ahead
3DMDebug 'ahead: ' . line
let pair_pat = '[' . escape(a:pair, '[]^\-') . ']'
let char_pat = '[' . escape(a:char, '[]^\-') . ']'
let idx = match(line, pair_pat)
let balance = 0
while go_next || idx >= 0 && balance >= 0 && line[idx : ] !~# char_pat
if idx == -1
let idx = strchars(matchstr(a:info.cur.next_line, '^\s*\S'))
break
endif
if line[idx : ] =~# char_pat
let balance -= 1
else
let balance += 1
endif
let idx = match(line, pair_pat, idx + 1)
endwhile
3DMDebug 'idx: ' . idx
return idx + 1
endfunction
if line[idx : ] =~# char_pat
let balance -= 1
else
let balance += 1
endif
let idx = match(line, pair_pat, idx + 1)
endwhile
3DMDebug 'idx: ' . idx
return idx + 1
endfunction
function! s:keys4space(info, opts) "{{{1
2DMDebug string(a:opts)
let empty_pair = !empty(filter(copy(a:opts.pairs),
\'v:val ==# a:info.cur.around'))
if a:opts.expand_space && empty_pair
2DMDebug "expand space inside a pair"
return " \<C-G>U\<Left>"
endif
let empty_quotes = !empty(filter(copy(a:opts.quotes),
\'v:val.v:val ==# a:info.cur.around'))
if a:opts.expand_space && a:opts.expand_inside_quotes && empty_quotes
2DMDebug "expand space inside quotes"
return " \<C-G>U\<Left>"
endif
2DMDebug "do nothing"
return ''
endfunction
function! s:keys4left(char, pair, info, opts) "{{{1
"| cases | criteria | action options | action
"| | balance | auto balance back smart | close back
"|--------|----------|-----------------------------|------------
"| any | any | 0 0 1 1 | 0 0
"| any | any | 0 0 1 0 | 0 0
"| (|)) | -1 | 1 1 1 0 | 0 0
"| (|) | 0 | 1 1 1 0 | 1 1
"| ((|) | 1 | 1 1 1 0 | 1 0
if !a:opts.autoclose
2DMDebug "No autoclose"
return ''
endif
let exprs = a:opts.smart_pairs_base + a:opts.smart_pairs_extra
if a:opts.smart_pairs && s:any_is_true(exprs, a:info, a:opts)
2DMDebug "smart pairs"
return ''
endif
if a:opts.balance_pairs && s:balance_pairs(a:pair, a:info, a:opts) < 0
2DMDebug "balance pairs"
return ''
endif
let eol_marker = a:opts.insert_eol_marker == 1
\&& empty(a:info.cur.ahead) ? a:opts.eol_marker
\ . "\<C-G>U\<Left>" : ''
2DMDebug "add right delimiter"
let jump_back = a:opts.jump_back ? "\<C-G>U\<Left>" : ''
return "\<C-V>" . strcharpart(a:pair, 1, 1) . eol_marker . jump_back
endfunction
function! s:keys4right(char, pair, info, opts) "{{{1
"| cases | criteria | action options | action
"| | next prev close bal | next long bal | jump back
"|--------|---------------------|----------------|-----------
"| (|)) | 1 1 1 -1 | 1 1 0 | 1 0
"| (|) | 1 1 1 0 | 1 1 0 | 1 0
"| ((|) | 1 1 1 1 | 1 1 0 | 1 0
"| x|) | 1 0 1 -1 | 1 1 0 | 1 0
"| (x|) | 1 0 1 0 | 1 1 0 | 1 0
"| ((x|) | 1 0 1 1 | 1 1 1 | 1 0
"| (| | 0 1 0 1 | 0 0 1 | 0 1
"| |x) | 0 0 1 -1 | 0 1 0 | 1 0
"| (x|x)) | 0 0 1 -1 | 0 1 0 | 1 0
"| (x|x) | 0 0 1 0 | 0 1 0 | 1 0
"| ((x|x) | 0 0 1 1 | 0 0 1 | 0 1
"| x| | 0 0 0 0 | 0 0 0 | 0 0
"| (x| | 0 0 0 1 | 0 0 0 | 0 0
let previous = strcharpart(a:pair, 0, 1) ==# a:info.cur.prev_char
let is_cr_exp = a:opts.expand_cr
\ && empty(a:info.cur.ahead)
\ && matchstr(a:info.cur.next_line, '^\s*\zs\S') ==# a:char
let is_space_exp = a:opts.expand_space
\ && matchstr(a:info.cur.ahead, '^\s\zs\S') ==# a:char
let next = a:char ==# a:info.cur.next_char || is_cr_exp || is_space_exp
let balance = s:balance_pairs(a:pair, a:info, a:opts)
\ - is_cr_exp
let next_line = a:opts.jump_expansion && a:opts.expand_cr
let closing = s:rights2jump_pair(a:char, a:pair, a:info, a:opts, next_line)
let jump_opts = a:opts.jump_next + (a:opts.jump_long * 2)
2DMDebug 'is_cr_exp: ' . is_cr_exp
2DMDebug 'is_space_exp: ' . is_space_exp
2DMDebug 'next: ' . next
2DMDebug 'previous: ' . previous
2DMDebug 'closing: ' . closing
2DMDebug 'balance: ' . balance
2DMDebug 'next_line: ' . next_line
2DMDebug 'jump_opts: ' . jump_opts
if next
2DMDebug "next"
if closing && jump_opts && (!a:opts.balance_pairs || balance <= 0)
2DMDebug "cases: '(|)', '(|))' or '((|)'"
2DMDebug "cases: 'x|)', '(x|)' or '((x|)'"
return "\<BS>" . repeat("\<C-G>U\<Right>", closing)
endif
2DMDebug "Nothing to do"
return ''
endif
" !next
if previous
2DMDebug "!next && previous"
if (!a:opts.balance_pairs || balance > 0) && a:opts.jump_back
2DMDebug "case: '(|'"
return "\<C-G>U\<Left>"
endif
2DMDebug "Nothing to do"
return ''
endif
" !next && !previous
if closing
2DMDebug "!next && !previous && closing"
if (!a:opts.balance_pairs || balance <= 0) && jump_opts >= 2
2DMDebug "case: '(x|x))' or '(x|x)'"
return "\<BS>" . repeat("\<C-G>U\<Right>", closing)
elseif (!a:opts.balance_pairs || balance > 0) && a:opts.jump_back
2DMDebug "case: '((x|x)'"
return "\<C-G>U\<Left>"
endif
2DMDebug "Nothing to do"
return ''
endif
2DMDebug "Nothing to do"
return ''
endfunction
function! s:keys4quote(char, info, opts) "{{{1
let quotes_behind = strchars(matchstr(a:info.cur.behind,
\'['.escape(a:char, '\^[]').']*$'))
let quotes_ahead = strchars(matchstr(a:info.cur.ahead,
\'^['.escape(a:char, '\^[]').']*'))
2DMDebug quotes_behind . ' - ' . quotes_ahead
2DMDebug string(a:opts.nesting_quotes)
if a:opts.autoclose && index(a:opts.nesting_quotes, a:char) >= 0
\&& quotes_behind > 1
let add2right = quotes_ahead > quotes_behind + 1
\? 0 : quotes_behind - quotes_ahead + 1
2DMDebug "nesting quotes"
2DMDebug add2right
return repeat(a:char, add2right) . repeat("\<C-G>U\<Left>", add2right)
endif
if a:info.cur.next_char ==# a:char
2DMDebug "jump over quote"
return "\<Del>"
endif
if a:info.is_ignored_syn
return ''
endif
let exprs = a:opts.smart_quotes_base + a:opts.smart_quotes_extra
if a:opts.autoclose && a:opts.smart_quotes
\&& s:any_is_true(exprs, a:info, a:opts)
2DMDebug "smart quotes"
return ''
endif
if !a:opts.autoclose && quotes_behind
2DMDebug "don't autoclose, jump back"
return "\<C-G>U\<Left>"
endif
if !a:opts.autoclose
2DMDebug "don't autoclose"
return ''
endif
2DMDebug "jump back"
return a:char . "\<C-G>U\<Left>"
endfunction
function! s:keys4cr(info, opts) "{{{1
if a:opts.expand_cr
\&& !empty(filter(copy(a:opts.pairs),
\ 'v:val ==# a:info.prev.around'))
\|| (a:opts.expand_cr == 2
\ && !empty(filter(copy(a:opts.pairs),
\ 'strcharpart(v:val, 1, 1) == a:info.cur.next_char')))
" Empty pair
2DMDebug "expand CR inside pair"
let eol_marker = a:opts.insert_eol_marker == 2
\&& strchars(a:info.cur.ahead) == 1 ? a:opts.eol_marker : ''
return "0\<C-D>\<Del>x\<C-G>U\<Left>\<BS>\<CR>" . a:info.cur.next_char
\. "\<Del>" . eol_marker . "\<Up>\<End>\<CR>"
endif
if a:opts.expand_cr && a:opts.expand_inside_quotes
\&& !empty(filter(copy(a:opts.quotes),
\ 'v:val.v:val ==# a:info.prev.around'))
" Empty pair
2DMDebug "expand CR inside quotes"
return "\<Up>\<End>\<CR>"
endif
2DMDebug "do nothing"
return ''
endfunction
" vim: sw=2 et
function! delimitMate#option(name) "{{{1
return s:option(a:name)
endfunction
function! delimitMate#ex_cmd(global, action) "{{{1
1DMDebug 'action: ' . a:action . ', scope: ' . (a:global ? 'g:' : 'b:')
let scope = a:global ? g: : b:
if a:action ==# 'enable'
let scope.delimitMate_enabled = 1
elseif a:action ==# 'disable'
let scope.delimitMate_enabled = 0
elseif a:action ==# 'switch'
let scope.delimitMate_enabled = !s:option('enabled')
endif
endfunction
function! delimitMate#InsertEnter(...) "{{{1
1DMDebug
call s:info.update()
let s:info.skip_icp = 0
endfunction
function! delimitMate#CursorMovedI(...) "{{{1
1DMDebug
call s:info.update()
let s:info.skip_icp = 0
endfunction
function! delimitMate#InsertCharPre(str) "{{{1
1DMDebug
1DMDebug printf('v:char: %s', string(a:str))
if s:info.skip_icp
" iabbrev fires this event for every char and the trigger
1DMDebug "iabbrev expansion running"
return 0
endif
if pumvisible()
1DMDebug "pumvisible"
return 0
endif
if s:info.nesting
1DMDebug "nesting"
let s:info.nesting -= 1
return 0
endif
let s:info.skip_icp = 1
if !s:option('enabled')
1DMDebug "disabled"
return 0
endif
let typeahead = ''
let synstack = join(map(
\synstack(line('.'), col('.')),
\'tolower(synIDattr(v:val, "name"))'), ',')
let s:info.is_ignored_syn = !empty(filter(
\s:option('excluded_regions'),
\'stridx(synstack, tolower(v:val)) >= 0'))
" v:char could be more than one character
for char in split(a:str, '\zs')
1DMDebug 'char: ' . char
let keys = ''
let s:info.char = char
let opts = s:defaults.consolidate()
if s:info.cur.is_escaped()
1DMDebug "escaped"
return
elseif !empty(filter(copy(opts.quotes), 'v:val ==# char'))
1DMDebug "quote"
let keys = s:keys4quote(char, s:info, opts)
let s:info.nesting = strchars(matchstr(keys, '^[^[:cntrl:]]*'))
let s:info.nesting = s:info.nesting < 3 ? 0 : s:info.nesting
elseif s:info.is_ignored_syn
1DMDebug "ignored syn group"
return
elseif char == ' '
1DMDebug "space"
let keys = s:keys4space(s:info, opts)
elseif !empty(filter(copy(opts.pairs),
\'strcharpart(v:val, 0, 1) ==# char'))
1DMDebug "left delimiter"
let pair = get(filter(copy(opts.pairs),
\'strcharpart(v:val, 0, 1) ==# char'), 0, '')
let keys = s:keys4left(char, pair, s:info, opts)
elseif !empty(filter(copy(opts.pairs),
\'strcharpart(v:val, 1, 1) ==# char'))
let pair = get(filter(copy(opts.pairs),
\'strcharpart(v:val, 1, 1) ==# char'), 0, '')
let keys = s:keys4right(char, pair, s:info, opts)
1DMDebug "right delimiter"
else
1DMDebug "just ignore it"
return 0
endif
1DMDebug 'keys: ' . strtrans(keys)
let typeahead .= keys
endfor
if !empty(typeahead)
1DMDebug "feed typeahead: " . strtrans(typeahead)
call feedkeys(typeahead, 'tmi')
endif
endfunction
function! delimitMate#TextChangedI(...) "{{{1
1DMDebug
if pumvisible()
1DMDebug "pumvisible"
return 0
endif
if !s:option('enabled')
1DMDebug "disabled"
return
endif
if s:info.cur.lnum == s:info.prev.lnum + 1
\&& s:info.prev.behind ==# s:info.cur.prev_line
\&& s:info.prev.ahead ==# s:info.cur.ahead
\&& s:info.cur.behind =~ '^\s*$'
" CR
1DMDebug "CR at eol"
return feedkeys(s:keys4cr(s:info, s:defaults.consolidate()), 'tni')
endif
if s:info.cur.lnum == s:info.prev.lnum - 1
\&& s:info.prev.prev_line ==# s:info.cur.line
\&& s:info.prev.next_line ==# s:info.cur.next_line
let pair = filter(s:option('pairs'), 's:info.cur.prev_char
\. matchstr(s:info.cur.next_line, "^\\s*\\zs\\S") ==# v:val')
if s:option('expand_cr') && !empty(pair)
1DMDebug "CR expansion inside pair"
let spaces = strchars(s:info.cur.next_line, '^\s*')
return feedkeys(repeat("\<Del>", spaces), 'nti')
endif
let quote = filter(s:option('quotes'), 's:info.cur.prev_char
\. matchstr(s:info.cur.next_line, "^\\s*\\zs\\S") ==# v:val.v:val')
if s:option('expand_cr') && s:option('expand_inside_quotes')
\&& !empty(quote)
1DMDebug "CR expansion inside quotes"
return feedkeys("\<Del>")
endif
1DMDebug "BS at bol"
return
endif
if s:info.cur.lnum != s:info.prev.lnum
1DMDebug "Cursor changed line"
return
endif
if s:info.prev.col - s:info.cur.col != len(s:info.prev.prev_char)
1DMDebug "zero or several characters were deleted"
return
endif
if len(s:info.prev.line) == len(s:info.cur.line)
1DMDebug "Same line length"
return
endif
1DMDebug s:info.prev.around
let pair = filter(s:option('pairs'), 'v:val ==# (s:info.cur.prev_char
\ . matchstr(s:info.cur.ahead, "^\\s\\zs\\S"))')
let quotes = filter(s:option('quotes'),
\ 'v:val . v:val ==# (s:info.cur.prev_char
\ . matchstr(s:info.cur.ahead, "^\\s\\zs\\S"))')
if s:option('expand_space') && (!empty(pair)
\|| (s:option('expand_inside_quotes') && !empty(quotes)))
1DMDebug "Space expansion inside pair"
return feedkeys("\<Del>", 'tni')
endif
let pair = filter(s:option('pairs'), 'v:val ==# s:info.prev.around')
let quote = filter(s:option('quotes'),
\'v:val . v:val ==# s:info.prev.around')
if !empty(pair) || !empty(quote)
1DMDebug "BS inside empty pair or quotes"
let keys = "\<Del>"
return feedkeys(keys, 'tni')
endif
1DMDebug "Everything else"
return
endfunction