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" Powerline - The ultimate statusline utility
"
" Author: Kim Silkebækken <kim.silkebaekken+vim@gmail.com>
" Source repository: https://github.com/Lokaltog/vim-powerline
" Script variables {{{
let g:Pl#OLD_STL = ''
let g:Pl#THEME = []
let g:Pl#THEME_CALLBACKS = []
let g:Pl#HL = []
" Cache revision, this must be incremented whenever the cache format is changed
let s:CACHE_REVISION = 5
" }}}
" Script initialization {{{
function! Pl#LoadCache() " {{{
if filereadable(g:Powerline_cache_file) && g:Powerline_cache_enabled
exec 'source' escape(g:Powerline_cache_file, ' \')
if ! exists('g:Powerline_cache_revision') || g:Powerline_cache_revision != s:CACHE_REVISION
" Cache revision differs, cache is invalid
unlet! g:Powerline_cache_revision
return 0
endif
" Create highlighting groups
for hi_cmd in g:Pl#HL
exec hi_cmd
endfor
" Run theme callbacks
for callback in g:Pl#THEME_CALLBACKS
" Substitute {{NEWLINE}} with newlines (strings must be
" stored without newlines characters to avoid vim errors)
exec substitute(callback[0], "{{NEWLINE}}", "\n", 'g')
exec substitute(callback[1], "{{NEWLINE}}", "\n", 'g')
endfor
return 1
endif
return 0
endfunction " }}}
function! Pl#ClearCache() " {{{
if filereadable(g:Powerline_cache_file)
" Delete the cache file
call delete(g:Powerline_cache_file)
endif
echo 'Powerline cache cleared. Please restart vim for the changes to take effect.'
endfunction " }}}
function! Pl#ReloadColorscheme() " {{{
call Pl#ClearCache()
" The colorscheme and theme files must be manually sourced because
" vim won't reload previously autoloaded files
"
" This is a bit hackish, but it works
unlet! g:Powerline#Colorschemes#{g:Powerline_colorscheme}#colorscheme
exec "source" split(globpath(&rtp, 'autoload/Powerline/Colorschemes/'. g:Powerline_colorscheme .'.vim', 1), '\n')[0]
unlet! g:Powerline#Themes#{g:Powerline_theme}#theme
exec "source" split(globpath(&rtp, 'autoload/Powerline/Themes/'. g:Powerline_theme .'.vim', 1), '\n')[0]
let g:Pl#THEME = []
call Pl#Load()
endfunction " }}}
function! Pl#Load() " {{{
if empty(g:Pl#OLD_STL)
" Store old statusline
let g:Pl#OLD_STL = &statusline
endif
if ! Pl#LoadCache()
try
" Autoload the theme dict first
let raw_theme = g:Powerline#Themes#{g:Powerline_theme}#theme
catch
echom 'Invalid Powerline theme! Please check your theme and colorscheme settings.'
return
endtry
" Create list with parsed statuslines
for buffer_statusline in raw_theme
unlet! mode_statuslines
let mode_statuslines = Pl#Parser#GetStatusline(buffer_statusline.segments)
if ! empty(buffer_statusline.callback)
" The callback function passes its arguments on to
" Pl#StatuslineCallback along with the normal/current mode
" statusline.
let s:cb_func = "function! PowerlineStatuslineCallback_". buffer_statusline.callback[1] ."(...)\n"
let s:cb_func .= "return Pl#StatuslineCallback(". string(mode_statuslines['n']) .", a:000)\n"
let s:cb_func .= "endfunction"
" The callback expression should be used to initialize any
" variables that will use the callback function. The
" expression requires a %s which will be replaced by the
" callback function name.
let s:cb_expr = printf(buffer_statusline.callback[2], 'PowerlineStatuslineCallback_'. buffer_statusline.callback[1])
exec s:cb_func
exec s:cb_expr
" Newlines must be substituted with another character
" because vim doesn't like newlines in strings
call add(g:Pl#THEME_CALLBACKS, [substitute(s:cb_func, "\n", "{{NEWLINE}}", 'g'), substitute(s:cb_expr, "\n", "{{NEWLINE}}", 'g')])
unlet! s:cb_func s:cb_expr
continue
endif
" Store the statuslines for matching specific buffers
call add(g:Pl#THEME, {
\ 'matches': buffer_statusline.matches,
\ 'mode_statuslines': mode_statuslines
\ })
endfor
if ! g:Powerline_cache_enabled
" Don't cache anything if caching is disabled or cache file isn't writeable
return
endif
" Prepare commands and statuslines for caching
let cache = [
\ 'let g:Powerline_cache_revision = '. string(s:CACHE_REVISION),
\ 'let g:Pl#HL = '. string(g:Pl#HL),
\ 'let g:Pl#THEME = '. string(g:Pl#THEME),
\ 'let g:Pl#THEME_CALLBACKS = '. string(g:Pl#THEME_CALLBACKS),
\ ]
call writefile(cache, g:Powerline_cache_file)
endif
endfunction " }}}
" }}}
" Statusline updater {{{
function! Pl#Statusline(statusline, current) " {{{
let mode = mode()
if ! a:current
let mode = 'N' " Normal (non-current)
elseif mode =~# '\v(v|V|)'
let mode = 'v' " Visual mode
elseif mode =~# '\v(s|S|)'
let mode = 's' " Select mode
elseif mode =~# '\vi'
let mode = 'i' " Insert mode
elseif mode =~# '\v(R|Rv)'
let mode = 'r' " Replace mode
else
" Fallback to normal mode
let mode = 'n' " Normal (current)
endif
return g:Pl#THEME[a:statusline].mode_statuslines[mode]
endfunction " }}}
function! Pl#StatuslineCallback(statusline, args) " {{{
" Replace %1, %2, etc. in the statusline with the callback args
return substitute(
\ a:statusline,
\ '\v\%(\d+)',
\ '\=a:args[submatch(1)]',
\ 'g')
endfunction " }}}
function! Pl#UpdateStatusline(current) " {{{
if empty(g:Pl#THEME)
" Load statuslines if they aren't loaded yet
call Pl#Load()
endif
for i in range(0, len(g:Pl#THEME) - 1)
if Pl#Match#Validate(g:Pl#THEME[i])
" Update window-local statusline
let &l:statusline = '%!Pl#Statusline('. i .','. a:current .')'
endif
endfor
endfunction " }}}
" }}}
|
