116 lines
2.6 KiB
VimL
116 lines
2.6 KiB
VimL
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function! gitgutter#fold#enable()
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call s:save_fold_state()
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call s:set_fold_levels()
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setlocal foldexpr=gitgutter#fold#level(v:lnum)
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setlocal foldmethod=expr
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setlocal foldlevel=0
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setlocal foldenable
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call gitgutter#utility#setbufvar(bufnr(''), 'folded', 1)
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endfunction
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function! gitgutter#fold#disable()
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call s:restore_fold_state()
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call gitgutter#utility#setbufvar(bufnr(''), 'folded', 0)
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endfunction
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function! gitgutter#fold#toggle()
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if s:folded()
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call gitgutter#fold#disable()
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else
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call gitgutter#fold#enable()
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endif
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endfunction
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function! gitgutter#fold#level(lnum)
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return gitgutter#utility#getbufvar(bufnr(''), 'fold_levels')[a:lnum]
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endfunction
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function! gitgutter#fold#foldtext()
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if !gitgutter#fold#is_changed()
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return foldtext()
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endif
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return substitute(foldtext(), ':', ' (*):', '')
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endfunction
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" Returns 1 if any of the folded lines have been changed
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" (added, removed, or modified), 0 otherwise.
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function! gitgutter#fold#is_changed()
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for hunk in gitgutter#hunk#hunks(bufnr(''))
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let hunk_begin = hunk[2]
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let hunk_end = hunk[2] + (hunk[3] == 0 ? 1 : hunk[3])
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if hunk_end < v:foldstart
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continue
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endif
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if hunk_begin > v:foldend
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break
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endif
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return 1
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endfor
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return 0
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endfunction
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" A line in a hunk has a fold level of 0.
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" A line within 3 lines of a hunk has a fold level of 1.
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" All other lines have a fold level of 2.
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function! s:set_fold_levels()
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let fold_levels = ['']
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for lnum in range(1, line('$'))
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let in_hunk = gitgutter#hunk#in_hunk(lnum)
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call add(fold_levels, (in_hunk ? 0 : 2))
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endfor
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let lines_of_context = 3
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for lnum in range(1, line('$'))
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if fold_levels[lnum] == 2
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let pre = lnum >= 3 ? lnum - lines_of_context : 0
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let post = lnum + lines_of_context
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if index(fold_levels[pre:post], 0) != -1
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let fold_levels[lnum] = 1
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endif
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endif
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endfor
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call gitgutter#utility#setbufvar(bufnr(''), 'fold_levels', fold_levels)
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endfunction
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function! s:save_fold_state()
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let bufnr = bufnr('')
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call gitgutter#utility#setbufvar(bufnr, 'foldlevel', &foldlevel)
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call gitgutter#utility#setbufvar(bufnr, 'foldmethod', &foldmethod)
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if &foldmethod ==# 'manual'
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mkview
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endif
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endfunction
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function! s:restore_fold_state()
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let bufnr = bufnr('')
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let &foldlevel = gitgutter#utility#getbufvar(bufnr, 'foldlevel')
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let &foldmethod = gitgutter#utility#getbufvar(bufnr, 'foldmethod')
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if &foldmethod ==# 'manual'
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loadview
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else
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normal! zx
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endif
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endfunction
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function! s:folded()
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return gitgutter#utility#getbufvar(bufnr(''), 'folded')
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endfunction
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