252 lines
8.2 KiB
VimL
252 lines
8.2 KiB
VimL
" MIT License. Copyright (c) 2013-2016 Bailey Ling.
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" vim: et ts=2 sts=2 sw=2
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scriptencoding utf-8
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let s:buffer_idx_mode = get(g:, 'airline#extensions#tabline#buffer_idx_mode', 0)
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let s:show_tab_type = get(g:, 'airline#extensions#tabline#show_tab_type', 1)
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let s:buffers_label = get(g:, 'airline#extensions#tabline#buffers_label', 'buffers')
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let s:spc = g:airline_symbols.space
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let s:current_bufnr = -1
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let s:current_modified = 0
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let s:current_tabline = ''
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let s:current_visible_buffers = []
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let s:number_map = {
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\ '0': '⁰',
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\ '1': '¹',
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\ '2': '²',
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\ '3': '³',
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\ '4': '⁴',
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\ '5': '⁵',
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\ '6': '⁶',
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\ '7': '⁷',
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\ '8': '⁸',
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\ '9': '⁹'
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\ }
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let s:number_map = &encoding == 'utf-8'
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\ ? get(g:, 'airline#extensions#tabline#buffer_idx_format', s:number_map)
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\ : {}
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function! airline#extensions#tabline#buffers#off()
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augroup airline_tabline_buffers
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autocmd!
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augroup END
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endfunction
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function! airline#extensions#tabline#buffers#on()
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augroup airline_tabline_buffers
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autocmd!
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autocmd BufDelete * call airline#extensions#tabline#buffers#invalidate()
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autocmd User BufMRUChange call airline#extensions#tabline#buflist#invalidate()
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autocmd User BufMRUChange call airline#extensions#tabline#buffers#invalidate()
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augroup END
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endfunction
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function! airline#extensions#tabline#buffers#invalidate()
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let s:current_bufnr = -1
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endfunction
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function! airline#extensions#tabline#buffers#get()
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call <sid>map_keys()
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let cur = bufnr('%')
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if cur == s:current_bufnr
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if !g:airline_detect_modified || getbufvar(cur, '&modified') == s:current_modified
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return s:current_tabline
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endif
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endif
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let l:index = 1
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let b = airline#extensions#tabline#new_builder()
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let tab_bufs = tabpagebuflist(tabpagenr())
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for nr in s:get_visible_buffers()
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if nr < 0
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call b.add_raw('%#airline_tabhid#...')
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continue
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endif
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let group = airline#extensions#tabline#group_of_bufnr(tab_bufs, nr)
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if nr == cur
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let s:current_modified = (group == 'airline_tabmod') ? 1 : 0
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endif
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" Neovim feature: Have clickable buffers
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if has("tablineat")
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call b.add_raw('%'.nr.'@airline#extensions#tabline#buffers#clickbuf@')
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endif
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if s:buffer_idx_mode
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if len(s:number_map) > 0
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call b.add_section(group, s:spc . get(s:number_map, l:index, '') . '%(%{airline#extensions#tabline#get_buffer_name('.nr.')}%)' . s:spc)
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else
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call b.add_section(group, '['.l:index.s:spc.'%(%{airline#extensions#tabline#get_buffer_name('.nr.')}%)'.']')
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endif
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let l:index = l:index + 1
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else
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call b.add_section(group, s:spc.'%(%{airline#extensions#tabline#get_buffer_name('.nr.')}%)'.s:spc)
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endif
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if has("tablineat")
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call b.add_raw('%X')
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endif
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endfor
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call b.add_section('airline_tabfill', '')
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call b.split()
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call b.add_section('airline_tabfill', '')
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if s:show_tab_type
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call b.add_section_spaced('airline_tabtype', s:buffers_label)
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endif
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if tabpagenr('$') > 1
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call b.add_section_spaced('airline_tabmod', printf('%s %d/%d', "tab", tabpagenr(), tabpagenr('$')))
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endif
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let s:current_bufnr = cur
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let s:current_tabline = b.build()
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return s:current_tabline
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endfunction
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function! s:get_visible_buffers()
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let buffers = airline#extensions#tabline#buflist#list()
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let cur = bufnr('%')
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let total_width = 0
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let max_width = 0
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for nr in buffers
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let width = len(airline#extensions#tabline#get_buffer_name(nr)) + 4
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let total_width += width
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let max_width = max([max_width, width])
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endfor
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" only show current and surrounding buffers if there are too many buffers
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let position = index(buffers, cur)
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let vimwidth = &columns
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if total_width > vimwidth && position > -1
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let buf_count = len(buffers)
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" determine how many buffers to show based on the longest buffer width,
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" use one on the right side and put the rest on the left
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let buf_max = vimwidth / max_width
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let buf_right = 1
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let buf_left = max([0, buf_max - buf_right])
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let start = max([0, position - buf_left])
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let end = min([buf_count, position + buf_right])
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" fill up available space on the right
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if position < buf_left
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let end += (buf_left - position)
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endif
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" fill up available space on the left
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if end > buf_count - 1 - buf_right
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let start -= max([0, buf_right - (buf_count - 1 - position)])
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endif
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let buffers = eval('buffers[' . start . ':' . end . ']')
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if start > 0
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call insert(buffers, -1, 0)
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endif
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if end < buf_count - 1
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call add(buffers, -1)
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endif
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endif
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let s:current_visible_buffers = buffers
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return buffers
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endfunction
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function! s:select_tab(buf_index)
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" no-op when called in the NERDTree buffer
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if exists('t:NERDTreeBufName') && bufname('%') == t:NERDTreeBufName
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return
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endif
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let idx = a:buf_index
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if s:current_visible_buffers[0] == -1
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let idx = idx + 1
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endif
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let buf = get(s:current_visible_buffers, idx, 0)
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if buf != 0
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exec 'b!' . buf
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endif
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endfunction
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function! s:jump_to_tab(offset)
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let l = s:current_visible_buffers
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let i = index(l, bufnr('%'))
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if i > -1
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exec 'b!' . l[float2nr(fmod(i + a:offset, len(l)))]
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endif
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endfunction
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function! s:map_keys()
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if s:buffer_idx_mode
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noremap <silent> <Plug>AirlineSelectTab1 :call <SID>select_tab(0)<CR>
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noremap <silent> <Plug>AirlineSelectTab2 :call <SID>select_tab(1)<CR>
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noremap <silent> <Plug>AirlineSelectTab3 :call <SID>select_tab(2)<CR>
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noremap <silent> <Plug>AirlineSelectTab4 :call <SID>select_tab(3)<CR>
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noremap <silent> <Plug>AirlineSelectTab5 :call <SID>select_tab(4)<CR>
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noremap <silent> <Plug>AirlineSelectTab6 :call <SID>select_tab(5)<CR>
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noremap <silent> <Plug>AirlineSelectTab7 :call <SID>select_tab(6)<CR>
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noremap <silent> <Plug>AirlineSelectTab8 :call <SID>select_tab(7)<CR>
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noremap <silent> <Plug>AirlineSelectTab9 :call <SID>select_tab(8)<CR>
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noremap <silent> <Plug>AirlineSelectPrevTab :<C-u>call <SID>jump_to_tab(-v:count1)<CR>
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noremap <silent> <Plug>AirlineSelectNextTab :<C-u>call <SID>jump_to_tab(v:count1)<CR>
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endif
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endfunction
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function! airline#extensions#tabline#buffers#clickbuf(minwid, clicks, button, modifiers) abort
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" Clickable buffers
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" works only in recent NeoVim with has('tablineat')
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" single mouse button click without modifiers pressed
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if a:clicks == 1 && a:modifiers !~# '[^ ]'
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if a:button is# 'l'
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" left button - switch to buffer
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silent execute 'buffer' a:minwid
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elseif a:button is# 'm'
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" middle button - delete buffer
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if get(g:, 'airline#extensions#tabline#middle_click_preserves_windows', 0) == 0
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" just simply delete the clicked buffer. This will cause windows
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" associated with the clicked buffer to be closed.
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silent execute 'bdelete' a:minwid
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else
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" find windows displaying the clicked buffer and open an new
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" buffer in them.
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let current_window = bufwinnr("%")
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let window_number = bufwinnr(a:minwid)
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let last_window_visited = -1
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" Set to 1 if the clicked buffer was open in any windows.
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let buffer_in_window = 0
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" Find the next window with the clicked buffer open. If bufwinnr()
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" returns the same window number, this is because we clicked a new
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" buffer, and then tried editing a new buffer. Vim won't create a
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" new empty buffer for the same window, so we get the same window
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" number from bufwinnr(). In this case we just give up and don't
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" delete the buffer.
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" This could be made cleaner if we could check if the clicked buffer
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" is a new buffer, but I don't know if there is a way to do that.
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while window_number != -1 && window_number != last_window_visited
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let buffer_in_window = 1
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silent execute window_number . 'wincmd w'
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silent execute 'enew'
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let last_window_visited = window_number
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let window_number = bufwinnr(a:minwid)
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endwhile
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silent execute current_window . 'wincmd w'
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if window_number != last_window_visited || buffer_in_window == 0
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silent execute 'bdelete' a:minwid
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endif
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endif
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endif
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endif
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endfunction
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