update readme, help; add faq, sample symbols

README.md

@@ -1,34 +1,35 @@
 # vim-airline
 
-lean & mean statusline for vim
+lean & mean statusline for vim that's light as air
 
 # rationale
 
-there's already [powerline](https://github.com/Lokaltog/powerline), why yet another statusline?
+there's already [powerline][b], why yet another statusline?
 
 *  it's standard vimscript, no python needed
 *  it's small.  i want the entire plugin to be less than 200 lines as a rule
-*  gets you 90% of the way there: in addition to all the standard goodies, supports [fugitve](https://github.com/tpope/vim-fugitive) and [syntastic](https://github.com/scrooloose/syntastic)
+*  gets you 90% of the way there: in addition to all the standard goodies, supports [fugitive](https://github.com/tpope/vim-fugitive) and [syntastic](https://github.com/scrooloose/syntastic)
 *  integration with [vim-bufferline](https://github.com/bling/vim-bufferline)
 *  looks good with regular fonts, with support to use powerline font glyths
 *  it's fast to load.  since it's so small, it only takes 0.5ms to load.  by comparison, powerline needs 60ms on the same machine.
 
 # why's it called airline?
 
-i wrote this on an airplane, and since it's light as air it turned out to be a good name :-)
+i wrote this on an airplane, and since it's light as air it turned out to be a good name.  thanks for flying vim!
 
 # configuration
 
-there are a couple configuration values available:
+`:help airline`
 
-* `g:airline_left_sep`  the seperator used on the left side
+# faq
-* `g:airline_right_sep`  the seperator used on the right side
-* `g:airline_enable_fugitive`  enable/disable fugitive integration
-* `g:airline_enable_syntastic`  enable/disable syntastic integration
-* `g:airline_theme`  change the theme, currently only `default` is available
-* `g:airline_powerline_fonts`  enable/disable usage of patched powerline font symbols
 
-# demo
+1.  the powerline font symbols are not showing up
+  *  the older deprecated [vim-powerline][a] uses different codes compared to the newer [powerline][b].
+  *  you can grab prepatched fonts at [powerline-fonts][c], or you can manually set the relevant `g:` variables
+2.  leaving insert mode does not update the statusline
+  *  this has been reproducible on older versions of vim, please use a newer version of vim
+
+# screenshots
 
 ## regular font
 
@@ -45,3 +46,7 @@ contributions and pull requests are welcome.
 # license
 
 `:h license`
+
+[a]: https://github.com/Lokaltog/vim-powerline
+[b]: https://github.com/Lokaltog/powerline
+[c]: https://github.com/Lokaltog/powerline-fonts

doc/airline.txt

@@ -1,4 +1,4 @@
-*airline.txt*  Lean and mean statusline
+*airline.txt*  Lean and mean statusline that's light as air
 
 ==============================================================================
 RATIONALE                                                          *airline*
@@ -25,7 +25,7 @@ i wrote this on an airplane, and since it's light as air it turned out to be a
 good name :-)
 
 ==============================================================================
-CONFIGURATION                                         *airline-configuration*
+CONFIGURATION                                        *airline-configuration*
 
 there are a couple configuration values available (shown with their default
 values):
@@ -60,6 +60,32 @@ values):
   let g:airline_powerline_fonts=0
 <
 
+==============================================================================
+CUSTOMIZATION                                        *airline-customization*
+
+here are some unicode symbols for customizing the left/right seperators, as
+well as the powerline font glyths
+
+>
+  " unicode symbols
+  let g:airline_left_sep = '»'
+  let g:airline_left_sep = '▶'
+  let g:airline_right_sep = '«'
+  let g:airline_right_sep = '◀'
+  let g:airline_linecolumn_prefix = '␊ '
+  let g:airline_linecolumn_prefix = '␤ '
+  let g:airline_fugitive_prefix = '⎇ '
+
+  " powerline symbols
+  let g:airline_left_sep = ''
+  let g:airline_left_sep = ''
+  let g:airline_right_sep = ''
+  let g:airline_right_sep = ''
+  let g:airline_fugitive_prefix = '   '
+  let g:airline_readonly_symbol = ''
+  let g:airline_linecolumn_prefix = ' '
+<
+
 ==============================================================================
 CONTRIBUTIONS                                        *airline-contributions*
 

plugin/airline.vim

@@ -1,10 +1,8 @@
-" powerline symbols:       
-" some unicode symbols: ▶ » « ◀
 if !exists('g:airline_left_sep')
-  let g:airline_left_sep=exists('g:airline_powerline_fonts')?"":">"
+  let g:airline_left_sep = exists('g:airline_powerline_fonts')?"":">"
 endif
 if !exists('g:airline_right_sep')
-  let g:airline_right_sep=exists('g:airline_powerline_fonts')?"":"<"
+  let g:airline_right_sep = exists('g:airline_powerline_fonts')?"":"<"
 endif
 if !exists('g:airline_enable_fugitive')
   let g:airline_enable_fugitive = 1
@@ -12,10 +10,18 @@ endif
 if !exists('g:airline_enable_syntastic')
   let g:airline_enable_syntastic = 1
 endif
-let g:airline_fugitive_prefix = exists('g:airline_powerline_fonts')?'   ':'  '
+if !exists('g:airline_fugitive_prefix')
-let g:airline_readonly_symbol = exists('g:airline_powerline_fonts')?'':'RO'
+  let g:airline_fugitive_prefix = exists('g:airline_powerline_fonts')?'   ':'  '
-let g:airline_linecolumn_prefix = exists('g:airline_powerline_fonts')?' ':':'
+endif
-let g:airline_theme = 'default'
+if !exists('g:airline_readonly_symbol')
+  let g:airline_readonly_symbol = exists('g:airline_powerline_fonts')?'':'RO'
+endif
+if !exists('g:airline_linecolumn_prefix')
+  let g:airline_linecolumn_prefix = exists('g:airline_powerline_fonts')?' ':':'
+endif
+if !exists('g:airline_theme')
+  let g:airline_theme = 'default'
+endif
 
 set laststatus=2