Simplify tradeoff between accuracy and speed.

If the plugin slows down your Vim too much, you can have it run less
often by setting `g:gitgutter_eager = 0`.

This replaces the former options `g:gitgutter_on_bufenter` and
`g:gitgutter_on_focusgained`.

README.mkd

@@ -81,8 +81,7 @@ You can customise:
 * Whether or not vim-gitgutter is on initially (defaults to on)
 * Whether or not signs are shown (defaults to yes)
 * Whether or not line highlighting is on initially (defaults to off)
-* Whether or not vim-gitgutter runs on `BufEnter` (defaults to yes)
-* Whether or not vim-gitgutter runs for all visible buffers on `FocusGained` (defaults to yes)
+* Whether or not vim-gitgutter runs eagerly (defaults to yes)
 
 Please note that vim-gitgutter won't override any colours or highlights you've set in your colorscheme.
 
@@ -171,26 +170,19 @@ Add `let g:gitgutter_enabled = 0` to your `~/.vimrc`.
 Add `let g:gitgutter_highlight_lines = 1` to your `~/.vimrc`.
 
 
-#### To stop vim-gitgutter running on `BufEnter`
+#### To stop vim-gitgutter running eagerly
 
-This is on by default but causes a noticeable lag for some people.  To turn it off, add this to your `~/.vimrc`:
+By default the plugin runs every time you read a file, on `BufEnter`, `TabEnter` and `FocusGained`.
+
+This can cause a noticeable lag for some people so you can set the plugin to run instead only when you read or write a file.
+
+To turn off eager execution, add this to your `~/.vimrc`:
 
 ```
-let g:gitgutter_on_bufenter = 0
+let g:gitgutter_eager = 0
 ```
 
-If you turn it off, vim-gitgutter will instead run every time you read or write a buffer.
-
-
-#### To stop vim-gitgutter running for all visible buffers on `FocusGained`
-
-This is on by default but causes a noticeable lag for some people.  To turn it off, add this to your `~/.vimrc`:
-
-```viml
-let g:gitgutter_all_on_focusgained = 0
-```
-
-Note that this is always off with gVim on Windows due to a Vim/shell bug causing an infinite loop.
+Note that `FocusGained` cannot be used with gVim on Windows due to a Vim/shell bug causing an infinite loop.
 
 
 ### FAQ
@@ -201,11 +193,10 @@ Your colorscheme is configuring the `SignColumn` highlight group weirdly.  Pleas
 
 > There's a noticeable lag when vim-gitter runs; how can I avoid it?
 
-By default vim-gitgutter runs often so the signs are as accurate as possible.  However on some systems this causes a noticeable lag.  If you would like to trade a little accuracy for speed, add one or both of these to your `~/.vimrc`:
+By default vim-gitgutter runs often so the signs are as accurate as possible.  However on some systems this causes a noticeable lag.  If you would like to trade a little accuracy for speed, add this to your `~/.vimrc`:
 
 ```viml
-let g:gitgutter_on_bufenter = 0
-let g:gitgutter_all_on_focusgained = 0
+let g:gitgutter_eager = 0
 ```
 
 > Why is no sign shown if I delete the first line(s) in a file?

doc/gitgutter.txt

@@ -99,9 +99,7 @@ You can customise:
 - Whether or not vim-gitgutter is on initially (defaults to on)
 - Whether or not signs are shown (defaults to yes)
 - Whether or not line highlighting is on initially (defaults to off)
-- Whether or not vim-gitgutter runs on `BufEnter` (defaults to yes)
-- Whether or not vim-gitgutter runs for all buffers on `FocusGained` (defaults
-  to yes)
+- Whether or not vim-gitgutter runs eagerly (defaults to yes)
 
 Please note that vim-gitgutter won't override any colours or highlights you've
 set in your colorscheme.
@@ -203,18 +201,11 @@ Add to your |vimrc|
   let g:gitgutter_highlight_lines = 1
 <
 
-TO STOP VIM-GITGUTTER RUNNING ON |BUFENTER|
+TO STOP VIM-GITGUTTER RUNNING EAGERLY
 
 Add to your |vimrc|
 >
-  let g:gitgutter_on_bufenter = 0
-<
-
-TO STOP VIM-GITGUTTER RUNNING ON |FOCUSGAINED|
-
-Add to your |vimrc|
->
-  let g:gitgutter_all_on_focusgained = 0
+  let g:gitgutter_eager = 0
 <
 
 

plugin/gitgutter.vim

@@ -20,8 +20,7 @@ call s:set('g:gitgutter_signs',                 1)
 call s:set('g:gitgutter_highlight_lines',       0)
 let s:highlight_lines = g:gitgutter_highlight_lines
 call s:set('g:gitgutter_sign_column_always',    0)
-call s:set('g:gitgutter_on_bufenter',           1)
-call s:set('g:gitgutter_all_on_focusgained',    1)
+call s:set('g:gitgutter_eager' ,                1)
 call s:set('g:gitgutter_sign_added',            '+')
 call s:set('g:gitgutter_sign_modified',         '~')
 call s:set('g:gitgutter_sign_removed',          '_')
@@ -118,10 +117,6 @@ function! s:snake_case_to_camel_case(text)
   return substitute(a:text, '\v(.)(\a+)(_(.)(.+))?', '\u\1\l\2\u\4\l\5', '')
 endfunction
 
-function! s:buffers()
-  return filter(range(1, bufnr('$')), 'buflisted(v:val)')
-endfunction
-
 " }}}
 
 " Highlights and signs {{{
@@ -405,8 +400,7 @@ endfunction
 " Public interface {{{
 
 function! GitGutterAll()
-  let buffer_ids = g:gitgutter_on_bufenter ? tabpagebuflist() : s:buffers()
-  for buffer_id in buffer_ids
+  for buffer_id in tabpagebuflist() 
     call GitGutter(expand('#' . buffer_id . ':p'))
   endfor
 endfunction
@@ -532,16 +526,14 @@ endfunction
 
 augroup gitgutter
   autocmd!
-  if g:gitgutter_on_bufenter
+  if g:gitgutter_eager
     autocmd BufEnter,BufWritePost,FileWritePost * call GitGutter(s:current_file())
-  else
-    autocmd BufReadPost,BufWritePost,FileReadPost,FileWritePost * call GitGutter(s:current_file())
-  endif
-  if g:gitgutter_all_on_focusgained
+    autocmd TabEnter * call GitGutterAll()
     if !has('gui_win32')
       autocmd FocusGained * call GitGutterAll()
     endif
-    autocmd TabEnter * call GitGutterAll()
+  else
+    autocmd BufReadPost,BufWritePost,FileReadPost,FileWritePost * call GitGutter(s:current_file())
   endif
   autocmd ColorScheme * call s:define_sign_column_highlight() | call s:define_highlights()
 augroup END