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|
if exists('g:loaded_autobrace') || &cp
finish
endif
let g:loaded_autobrace = 1
let s:pair_chars = {
\ '(': ')',
\ '[': ']',
\ '{': '}',
\}
let s:pair_cr_maps = {
\ ')': "<SID>go_up()",
\ ']': "<SID>go_up()",
\ '}': "<SID>go_up()",
\}
let s:pair_bs_maps = {
\ '"': "<SID>maybe_remove_adjacent_char('\"')",
\ "'": "<SID>maybe_remove_adjacent_char(\"'\")",
\ '(': "<SID>maybe_remove_empty_pair(')')",
\ '[': "<SID>maybe_remove_empty_pair(']')",
\ '{': "<SID>maybe_remove_empty_pair('}')",
\ '': "<SID>maybe_collapse_pair()",
\}
function! s:move_cursor_left()
return "\<Esc>i"
endfunction
function! s:skip_closing_char(char)
if s:nextchar() == a:char
return "\<Esc>la"
else
return a:char
endif
endfunction
function! s:has_bs_mapping(char)
return has_key(s:pair_bs_maps, a:char)
endfunction
function! s:run_bs_mapping(char)
return eval(s:pair_bs_maps[a:char])
endfunction
function! s:has_cr_mapping(char)
return has_key(s:pair_cr_maps, a:char)
endfunction
function! s:run_cr_mapping(char)
return eval(s:pair_cr_maps[a:char])
endfunction
function! s:go_up()
return "\<CR>\<Esc>O"
endfunction
function! s:maybe_remove_adjacent_char(char)
if s:nextchar() == a:char
return "\<BS>\<Del>"
else
return "\<BS>"
endif
endfunction
function! s:maybe_remove_empty_pair(char)
let l:start = [line('.'), col('.')]
let l:end = searchpos('[^ \t]', 'cnWz')
if l:end == [0, 0]
return "\<BS>"
endif
let l:next_nonblank = s:charat(l:end[0], l:end[1])
if l:next_nonblank != a:char
return "\<BS>"
endif
let l:diff = [l:end[0] - l:start[0], l:end[1] - l:start[1]]
if l:diff[0] == 0
return "\<BS>" . repeat("\<Del>", l:diff[1] + 1)
elseif l:diff[0] == 1
return "\<Esc>" . (l:diff[0] + 1) . "Ji" . "\<BS>\<Del>"
else
return "\<Esc>" . (l:diff[0] + 1) . "Ji" . "\<BS>\<BS>\<Del>"
endif
endfunction
function! s:maybe_collapse_pair()
let l:prev_line_idx = line('.') - 1
if l:prev_line_idx < 1
return "\<BS>"
endif
let l:prev_line_char = s:charat(l:prev_line_idx, col([l:prev_line_idx, '$']) - 1)
if l:prev_line_char !~ '[([{]'
return "\<BS>"
endif
let l:end = searchpos('[^ \t]', 'cnWz')
if l:end == [0, 0]
return "\<BS>"
endif
let l:next_nonblank = s:charat(l:end[0], l:end[1])
if l:next_nonblank != s:pair_chars[l:prev_line_char]
return "\<BS>"
endif
return "\<Esc>\<BS>" . (l:end[0] - l:prev_line_idx + 1) . "Ji\<BS>"
endfunction
function! s:prevchar()
return s:charat(line('.'), col('.') - 1)
endfunction
function! s:nextchar()
return s:charat(line('.'), col('.'))
endfunction
function! s:charat(line, col)
return getline(a:line)[a:col - 1]
endfunction
for [s:start, s:end] in [['(', ')'], ['{', '}'], ['[', ']']]
exe "inoremap <silent> ".s:start.
\ " ".s:start.s:end."<C-R>=<SID>move_cursor_left()<CR>"
exe "inoremap <silent> ".s:end.
\ " <C-R>=<SID>skip_closing_char('".s:end."')<CR>"
endfor
inoremap <silent><expr> '
\ <SID>nextchar() == "'"
\ ? "\<C-R>=\<SID>skip_closing_char(\"'\")\<CR>"
\ : col('.') == 1 \|\| match(<SID>prevchar(), '\W') != -1
\ ? "''\<C-R>=\<SID>move_cursor_left()\<CR>"
\ : "'"
inoremap <silent><expr> "
\ <SID>nextchar() == '"'
\ ? "\<C-R>=\<SID>skip_closing_char('\"')\<CR>"
\ : "\"\"\<C-R>=\<SID>move_cursor_left()\<CR>"
inoremap <silent><expr> <BS>
\ <SID>has_bs_mapping(<SID>prevchar())
\ ? "\<C-R>=\<SID>run_bs_mapping(\<SID>prevchar())\<CR>"
\ : "\<BS>"
inoremap <silent><expr> <CR>
\ <SID>has_cr_mapping(<SID>nextchar())
\ ? "\<C-R>=\<SID>run_cr_mapping(\<SID>nextchar())\<CR>"
\ : "\<CR>"
|
