[Pandoc flavoured Markdown](https://en.wikipedia.org/wiki/Markdown#CommonMark) has its [own file type in `vim`](https://github.com/vim-pandoc/vim-pandoc-syntax#standalone), namely `markdown.pandoc`.
Word count by default in `vim-airline` obviously would make a lot of sense for this popular file type.
Fix this, by making sure that the wordcount extensions will apply
correctly if any of the combined filetypes (e.g. either pandoc or
markdwon) matches the list of allowed filetypes.
closes#2029
airline#util#focusgain(1) was called too soon -- it's called before vim
loses focus and not after it gains focus. Instead, we ignore the next
FocusGained event.
Previously it used a width of >= 80 to display the long word count
format. However I personally found that a bit too wide, while other
sections will be shortened too much which does not really look nice.
Therefore, adjust the limit a bit, using the short word count format for
windows up to 85 characters.
This fixes a bug that causes a mangled statusline. The bug occurs, when
the `displayed_head_limit` variable is set and causes the substring
expression to take a substring, which ends in the middle of a multi-byte
character.
This patch replaces the byte-based methods for measuring the
length of the branch name and creating a substring with methods that are
character-based and multi-byte aware.
It also has the nice side effect of making the length measuring more
accurate, by taking the actual display width of multi-byte characters
and the ambiwidth setting into account.
Since we need to take into account older Vim 7.4 (which might not have
the strcharpart() function), do introduce a compatibility wrapper in
airline#util that checks for the existence of the function before using
it. Older Vims will keep on using the byte-based index. I suppose Vim
7.4 before the strcharpart() function was available (patch 7.4.1730)
shouldn't be in use anymore.
closes#1948
When `g:skip_empty_sections` is set, `:AirlineRefresh` can be called
very often and cause slow down, because it forcefully re-creates the
highlighting groups. This is mostly not needed for the redraw to happen,
therefore, add the `<bang>` attribute to the command, making it skip to
re-create the highlighting groups and have all extensions that rely on a
forced update use the `!` form.
Should be much fast then.
fixes#1908
