mirror of
https://github.com/airblade/vim-gitgutter.git
synced 2025-11-08 11:33:48 -05:00
122 lines
4.0 KiB
VimL
122 lines
4.0 KiB
VimL
" Vim doesn't namespace sign ids so every plugin shares the same
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" namespace. Sign ids are simply integers so to avoid clashes with other
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" signs we guess at a clear run.
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"
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" Note also we currently never reset s:next_sign_id.
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let s:first_sign_id = 3000
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let s:next_sign_id = s:first_sign_id
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let s:dummy_sign_id = s:first_sign_id - 1
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" Removes gitgutter's signs from the given file.
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function! sign#clear_signs(file_name)
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let signs = getbufvar(a:file_name, 'gitgutter_gitgutter_signs')
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for sign in (type(signs) == 3 ? signs : [])
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execute "sign unplace" sign[1] "file=" . a:file_name
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endfor
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call setbufvar(a:file_name, 'gitgutter_gitgutter_signs', [])
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endfunction
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" Updates gitgutter's signs in the given file.
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"
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" modified_lines: list of [line_number, name]
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" where name = 'added|removed|modified|modified_removed'
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function! sign#update_signs(file_name, modified_lines)
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call sign#find_current_signs(a:file_name)
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let new_gitgutter_signs_line_numbers = map(copy(a:modified_lines), 'v:val[0]')
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call sign#remove_obsolete_gitgutter_signs(a:file_name, new_gitgutter_signs_line_numbers)
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call sign#upsert_new_gitgutter_signs(a:file_name, a:modified_lines)
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endfunction
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function! sign#add_dummy_sign()
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execute "sign place" s:dummy_sign_id "line=" . 9999 "name=GitGutterDummy file=" . utility#file()
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endfunction
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function! sign#remove_dummy_sign()
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if exists('s:dummy_sign_id')
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execute "sign unplace" s:dummy_sign_id "file=" . utility#file()
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endif
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endfunction
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"
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" Internal functions
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"
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function! sign#find_current_signs(file_name)
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let gitgutter_signs = []
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let other_signs = []
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redir => signs
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silent execute "sign place file=" . a:file_name
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redir END
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for sign_line in filter(split(signs, '\n'), 'v:val =~# "="')
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" Typical sign line: line=88 id=1234 name=GitGutterLineAdded
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" We assume splitting is faster than a regexp.
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let components = split(sign_line)
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let name = split(components[2], '=')[1]
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if name !~# 'GitGutterDummy'
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let line_number = str2nr(split(components[0], '=')[1])
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if name =~# 'GitGutter'
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let id = str2nr(split(components[1], '=')[1])
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call add(gitgutter_signs, [line_number, id, name]) " TODO: use dictionary instead?
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else
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call add(other_signs, line_number)
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endif
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end
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endfor
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call setbufvar(a:file_name, 'gitgutter_gitgutter_signs', gitgutter_signs)
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call setbufvar(a:file_name, 'gitgutter_other_signs', other_signs)
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endfunction
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function! sign#remove_obsolete_gitgutter_signs(file_name, new_gitgutter_signs_line_numbers)
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let old_gitgutter_signs = getbufvar(a:file_name, 'gitgutter_gitgutter_signs')
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for sign in old_gitgutter_signs
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let line_number = sign[0]
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if index(a:new_gitgutter_signs_line_numbers, line_number) == -1
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let id = sign[1]
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execute "sign unplace" id "file=" . a:file_name
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endif
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endfor
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endfunction
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function! sign#upsert_new_gitgutter_signs(file_name, modified_lines)
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let other_signs = getbufvar(a:file_name, 'gitgutter_other_signs')
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let old_gitgutter_signs = getbufvar(a:file_name, 'gitgutter_gitgutter_signs')
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let old_gitgutter_signs_line_numbers = map(copy(old_gitgutter_signs), 'v:val[0]')
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for line in a:modified_lines
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let line_number = line[0]
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if index(other_signs, line_number) == -1 " don't clobber others' signs
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let name = 'GitGutterLine' . utility#snake_case_to_camel_case(line[1])
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let idx = index(old_gitgutter_signs_line_numbers, line_number)
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if idx == -1 " insert
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let id = sign#next_sign_id()
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execute "sign place" id "line=" . line_number "name=" . name "file=" . a:file_name
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else " update if sign has changed
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let old_name = old_gitgutter_signs[idx][2]
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if old_name !=# name
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let id = old_gitgutter_signs[idx][1]
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execute "sign place" id "name=" . name "file=" . a:file_name
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end
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endif
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endif
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endfor
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endfunction
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function! sign#next_sign_id()
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let next_id = s:next_sign_id
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let s:next_sign_id += 1
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return next_id
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endfunction
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