vim-signify/plugin/signify.vim
2013-03-05 23:21:13 +01:00

218 lines
7.3 KiB
VimL

if exists('g:loaded_signify') || !executable('git') || &cp
finish
endif
let g:loaded_signify = 1
" Default values {{{1
let s:line_highlight_b = 0
let s:colors_set_b = 0
let s:active_buffers = {}
let s:id_start = 0x100
let s:id_top = s:id_start
let s:id_jump = s:id_start
" Default mappings {{{1
if exists('g:signify_mapping_next_change')
exe 'nnoremap '. g:signify_mapping_next_change .' :SignifyJumpToNextChange<cr>'
else
nnoremap <leader>gn :SignifyJumpToNextChange<cr>
endif
if exists('g:signify_mapping_prev_change')
exe 'nnoremap '. g:signify_mapping_prev_change .' :SignifyJumpToPrevChange<cr>'
else
nnoremap <leader>gp :SignifyJumpToPrevChange<cr>
endif
if exists('g:signify_mapping_toggle_highlight')
exe 'nnoremap '. g:signify_mapping_toggle_highlight .' :SignifyToggleHighlight<cr>'
else
nnoremap <leader>gh :SignifyToggleHighlight<cr>
endif
if exists('g:signify_mapping_toggle')
exe 'nnoremap '. g:signify_mapping_toggle .' :SignifyToggle<cr>'
else
nnoremap <leader>gt :SignifyToggle<cr>
endif
" Default signs {{{1
if exists('g:signify_sign_add')
exe 'sign define SignifyAdd text='. g:signify_sign_add .' texthl=SignifyAdd linehl=none'
else
sign define SignifyAdd text=>> texthl=SignifyAdd linehl=none
endif
if exists('g:signify_sign_delete')
exe 'sign define SignifyDelete text='. g:signify_sign_delete .' texthl=SignifyDelete linehl=none'
else
sign define SignifyDelete text=<< texthl=SignifyDelete linehl=none
endif
if exists('g:signify_sign_change')
exe 'sign define SignifyChange text='. g:signify_sign_change .' texthl=SignifyChange linehl=none'
else
sign define SignifyChange text=!! texthl=SignifyChange linehl=none
endif
" Initial stuff {{{1
aug signify
au!
au ColorScheme * call s:set_colors()
au BufWritePost,BufEnter * call s:start()
au BufDelete * call s:stop() | call remove(s:active_buffers, expand('%:p'))
aug END
com! -nargs=0 -bar SignifyToggle call s:toggle_signify()
com! -nargs=0 -bar SignifyToggleHighlight call s:toggle_line_highlighting()
com! -nargs=0 -bar SignifyJumpToNextChange call s:jump_to_next_change()
com! -nargs=0 -bar SignifyJumpToPrevChange call s:jump_to_prev_change()
" Internal functions {{{1
" Functions -> s:start() {{{2
function! s:start() abort
let l:path = expand('%:p')
if empty(l:path) || &ft == 'help'
return
endif
" New buffer.. add to list.
if !has_key(s:active_buffers, l:path)
let s:active_buffers[l:path] = 1
" Inactive buffer.. bail out.
elseif get(s:active_buffers, l:path) == 0
return
endif
" Is a diff available?
let s:diff = system('git diff --no-ext-diff -U0 '. fnameescape(l:path) .'| grep "^@@ "')
if v:shell_error
sign unplace *
return
endif
" Set colors only for the first time or when a new colorscheme is set.
if !s:colors_set_b
call s:set_colors()
let s:colors_set_b = 1
endif
" Use git's diff cmd to set our signs.
call s:process_diff(s:diff)
endfunction
" Functions -> s:stop() {{{2
function! s:stop() abort
sign unplace *
aug signify
au! * <buffer>
aug END
let s:active_buffers[expand('%:p')] = 0
endfunction
" Functions -> s:toggle_signify() {{{2
function! s:toggle_signify() abort
let l:path = expand('%:p')
if has_key(s:active_buffers, l:path) && get(s:active_buffers, l:path) == 1
call s:stop()
let s:active_buffers[l:path] = 0
echom 'signify: stopped!'
else
let s:active_buffers[l:path] = 1
call s:start()
echom 'signify: started!'
endif
endfunction
" Functions -> s:set_colors() {{{2
func! s:set_colors() abort
if has('gui_running')
let guibg = synIDattr(hlID('LineNr'), 'bg', 'gui')
if empty(guibg)
hi SignifyAdd gui=bold guifg=#11ee11
hi SignifyDelete gui=bold guifg=#ee1111
hi SignifyChange gui=bold guifg=#eeee11
else
exe 'hi SignifyAdd gui=bold guifg=#11ee11 guibg='. guibg
exe 'hi SignifyDelete gui=bold guifg=#ee1111 guibg='. guibg
exe 'hi SignifyChange gui=bold guifg=#eeee11 guibg='. guibg
endif
else
let ctermbg = synIDattr(hlID('LineNr'), 'bg', 'cterm')
if empty(ctermbg)
hi SignifyAdd cterm=bold ctermfg=2
hi SignifyDelete cterm=bold ctermfg=1
hi SignifyChange cterm=bold ctermfg=3
else
exe 'hi SignifyAdd cterm=bold ctermfg=2 ctermbg='. ctermbg
exe 'hi SignifyDelete cterm=bold ctermfg=1 ctermbg='. ctermbg
exe 'hi SignifyChange cterm=bold ctermfg=3 ctermbg='. ctermbg
endif
endif
endfunc
" Functions -> s:process_diff() {{{2
function! s:process_diff(diff) abort
sign unplace *
let s:id_top = s:id_start
" Determine where we have to put our signs.
for line in split(a:diff, '\n')
" Parse diff output.
let tokens = matchlist(line, '\v^\@\@ -(\d+),?(\d*) \+(\d+),?(\d*)')
if empty(tokens)
echoerr 'signify: Could not parse this line "'. line .'"'
endif
let [ old_line, old_count, new_line, new_count ] = [ str2nr(tokens[1]), (tokens[2] == '') ? 1 : str2nr(tokens[2]), str2nr(tokens[3]), (tokens[4] == '') ? 1 : str2nr(tokens[4]) ]
" A new line was added.
if (old_count == 0) && (new_count >= 1)
let offset = 0
while offset < new_count
exe 'sign place '. s:id_top .' line='. (new_line + offset) .' name=SignifyAdd file='. expand('%:p')
let [ offset, s:id_top ] += [ 1, 1 ]
endwhile
" An old line was removed.
elseif (old_count >= 1) && (new_count == 0)
exe 'sign place '. s:id_top .' line='. old_line .' name=SignifyDelete file='. expand('%:p')
let s:id_top += 1
" A line was changed.
else
let offset = 0
while offset < new_count
exe 'sign place '. s:id_top .' line='. (new_line + offset) .' name=SignifyChange file='. expand('%:p')
let [ offset, s:id_top ] += [ 1, 1 ]
endwhile
endif
endfor
endfunction
" Functions -> s:toggle_line_highlighting() {{{2
function! s:toggle_line_highlighting() abort
if s:line_highlight_b
sign define SignifyAdd text=+ texthl=SignifyAdd linehl=none
sign define SignifyChange text=* texthl=SignifyChange linehl=none
sign define SignifyDelete text=- texthl=SignifyDelete linehl=none
let s:line_highlight_b = 0
else
sign define SignifyAdd text=+ texthl=SignifyAdd linehl=DiffAdd
sign define SignifyChange text=* texthl=SignifyChange linehl=DiffChange
sign define SignifyDelete text=- texthl=SignifyRemove linehl=DiffDelete
let s:line_highlight_b = 1
endif
call s:start()
endfunction
" Functions -> s:jump_to_next_change() {{{2
function! s:jump_to_next_change()
exe 'sign jump '. s:id_jump .' file='. expand('%:p')
let s:id_jump = ((s:id_jump + 1) == s:id_top) ? (s:id_start) : (s:id_jump + 1)
endfunction
" Functions -> s:jump_to_prev_change() {{{2
function! s:jump_to_prev_change()
exe 'sign jump '. s:id_jump .' file='. expand('%:p')
let s:id_jump = (s:id_jump == s:id_start) ? (s:id_top - 1) : (s:id_jump - 1)
endfunction