Why vim-airline is not showing symbols properly?

Question

I am using vim-airline to show status line at the bottom in vim editor.

Below is my .vimrc.local file.

and here is how my status line looks like.

Why the symbols are not showing properly?

Answer 1

Your font does not display all unicode characters but that is not a problem.

You need to install a patched font. Instructions can be found in the official powerline documentation. Prepatched fonts can be found in the powerline-fonts repository.

Otherwise you can change the separator by editing your vimrc, personally I have the following:

" the separator used on the left side
let g:airline_left_sep=''
" the separator used on the right side 
let g:airline_right_sep=''

Yes this is no separator. This render the following (with solarized colors):

Answer 2

I am on Kubuntu and this is how I set it up for vim in a terminal as well as gvim.

1. Install the powerline-fonts from the Github repository mentioned by the maggick user.
2. Set your terminal font to the "Droid Sans Mono Slashed for Powerline" font.

3. Start vim in that terminal and go to the help section of airline:

   :help airline
   

Scroll down to the section showing powerline symbols and copy the section:

" powerline symbols
let g:airline_left_sep = ''
let g:airline_left_alt_sep = ''
let g:airline_right_sep = ''
let g:airline_right_alt_sep = ''

(Don't copy them from here, copy them from your vim help in your terminal)

4. Open your vimrc.local file and paste the lines there.

5. Set the font in your gvimrc.local to the same font you selected in the terminal:

   if has('gui_running')
       set guifont=Droid\ Sans\ Mono\ Slashed\ for\ Powerline
   endif
   

Start vim and gvim and the airline should show correct visuals in both cases.