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Statusline: Use separator widths to calculate whether a title will fit

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mrmr1993
2018-03-18 00:15:29 +00:00
parent 896c14bded
commit 84bf60c405
2 changed files with 60 additions and 16 deletions
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55
autoload/airline/extensions/tabline/builder.vim
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@@ -14,7 +14,7 @@ function! s:prototype.insert_tabs(curtab, first_tab, last_tab) dict
let self._right_position = self._left_position
endfunction
function! s:prototype.try_insert_tab(tab, pos, sep_size, force) dict
function! s:prototype.try_insert_tab(tab, group, pos, sep_size, force) dict
let tab_title = self.get_title(a:tab)
let self._remaining_space -= s:strchars(s:evaluate_tabline(tab_title)) + a:sep_size
if a:force || self._remaining_space >= 0
@@ -25,7 +25,7 @@ function! s:prototype.try_insert_tab(tab, pos, sep_size, force) dict
let pos += 1
endif
call self.insert_section(self.get_group(a:tab), tab_title, pos)
call self.insert_section(a:group, tab_title, pos)
let self._right_position += 1
let pos += 1
@@ -42,6 +42,20 @@ function! s:prototype.try_insert_tab(tab, pos, sep_size, force) dict
return 0
endfunction
function! s:get_separator_change(new_group, old_group, end_group, sep_size, alt_sep_size)
let sep_change = 0
if !empty(a:end_group)
let sep_change += airline#builder#should_change_group(a:new_group, a:end_group) ? a:sep_size : a:alt_sep_size
endif
if !empty(a:old_group)
let sep_change += airline#builder#should_change_group(a:new_group, a:old_group) ? a:sep_size : a:alt_sep_size
if !empty(a:end_group)
let sep_change -= airline#builder#should_change_group(a:old_group, a:end_group) ? a:sep_size : a:alt_sep_size
endif
endif
return sep_change
endfunction
function! s:prototype.build() dict
if has_key(self, '_left_position')
let self._remaining_space = &columns - s:strchars(s:evaluate_tabline(self._build()))
@@ -53,16 +67,21 @@ function! s:prototype.build() dict
let skipped_tabs_marker = get(g:, 'airline#extensions#tabline#overflow_marker', g:airline_symbols.ellipsis)
let skipped_tabs_marker_size = s:strchars(s:evaluate_tabline(skipped_tabs_marker))
" The left marker will have left_alt_sep, and the right will have left_sep.
let self._remaining_space -= 2 * skipped_tabs_marker_size + left_sep_size + left_alt_sep_size
"
" There are always two left_seps (either side of the selected tab) and all
" other seperators are left_alt_seps.
let self._remaining_space -= left_sep_size - left_alt_sep_size
" Allow space for the markers before we begin filling in titles.
let self._remaining_space -= 2 * skipped_tabs_marker_size
let outer_left_group = airline#builder#get_prev_group(self._sections, self._left_position)
let outer_right_group = airline#builder#get_next_group(self._sections, self._right_position)
" Add the current tab
let group = self.get_group(self._left_tab)
let sep_change =
\ s:get_separator_change(group, "", outer_left_group, left_sep_size, left_alt_sep_size) +
\ s:get_separator_change(group, "", outer_right_group, left_sep_size, left_alt_sep_size)
let last_left_group = group
let last_right_group = group
let self._left_tab -=
\ self.try_insert_tab(self._left_tab, self._left_position, left_sep_size, 1)
\ self.try_insert_tab(self._left_tab, group, self._left_position, sep_change, 1)
if get(g:, 'airline#extensions#tabline#current_first', 0)
" always have current tabpage first
@@ -71,18 +90,30 @@ function! s:prototype.build() dict
" Add the tab to the right
if !center_active && self._right_tab <= self._last_tab
let group = self.get_group(self._right_tab)
let sep_change =
\ s:get_separator_change(group, last_right_group, outer_right_group, left_sep_size, left_alt_sep_size)
let last_right_group = group
let self._right_tab +=
\ self.try_insert_tab(self._right_tab, self._right_position, left_alt_sep_size, 1)
\ self.try_insert_tab(self._right_tab, group, self._right_position, sep_change, 1)
endif
while self._remaining_space > 0
let done = 0
if self._left_tab >= self._first_tab
let done = self.try_insert_tab(self._left_tab, self._left_position, left_alt_sep_size, 0)
let group = self.get_group(self._left_tab)
let sep_change =
\ s:get_separator_change(group, last_left_group, outer_left_group, left_sep_size, left_alt_sep_size)
let last_left_group = group
let done = self.try_insert_tab(self._left_tab, group, self._left_position, sep_change, 0)
let self._left_tab -= done
endif
if self._right_tab <= self._last_tab && (center_active || !done)
let done = self.try_insert_tab(self._right_tab, self._right_position, left_alt_sep_size, 0)
let group = self.get_group(self._right_tab)
let sep_change =
\ s:get_separator_change(group, last_right_group, outer_right_group, left_sep_size, left_alt_sep_size)
let last_right_group = group
let done = self.try_insert_tab(self._right_tab, group, self._right_position, sep_change, 0)
let self._right_tab += done
endif
if !done