Add buffer_func option

autoload/ctrlp.vim

@@ -12,6 +12,7 @@ fu! s:opts()
 	let [pref, opts] = ['g:ctrlp_', {
 		\ 'arg_map':               ['s:argmap', 0],
 		\ 'by_filename':           ['s:byfname', 0],
+		\ 'buffer_func':           ['s:buffunc', {}],
 		\ 'clear_cache_on_exit':   ['s:clrex', 1],
 		\ 'custom_ignore':         ['s:usrign', ''],
 		\ 'default_input':         ['s:deftxt', 0],
@@ -175,6 +176,7 @@ fu! s:Open()
 	cal s:getenv()
 	cal s:execextvar('enter')
 	sil! exe 'noa keepa' ( s:mwbottom ? 'bo' : 'to' ) '1new ControlP'
+	cal s:buffunc(1)
 	let [s:bufnr, s:prompt, s:winw] = [bufnr('%'), ['', '', ''], winwidth(0)]
 	abc <buffer>
 	if !exists('s:hstry')
@@ -191,6 +193,7 @@ fu! s:Open()
 endf
 
 fu! s:Close()
+	cal s:buffunc(0)
 	try | noa bun!
 	cat | noa clo! | endt
 	cal s:unmarksigns()
@@ -1492,6 +1495,14 @@ fu! s:log(m)
 	en | en
 endf
 
+fu! s:buffunc(e)
+	if a:e && has_key(s:buffunc, 'enter')
+		cal call(s:buffunc['enter'], [])
+	elsei !a:e && has_key(s:buffunc, 'exit')
+		cal call(s:buffunc['exit'], [])
+	en
+endf
+
 fu! s:openfile(cmd, fid, tail, ...)
 	let cmd = a:cmd =~ '^[eb]$' && &modified ? 'hid '.a:cmd : a:cmd
 	let cmd = cmd =~ '^tab' ? tabpagenr('$').cmd : cmd

doc/ctrlp.txt

@@ -374,6 +374,9 @@ works in regexp mode. To split the pattern, separate words with space: >
   let g:ctrlp_use_migemo = 0
 <
 
+-------------------------------------------------------------------------------
+ADVANCED OPTIONS                                       *ctrlp-advanced-options*
+
                                                         *'g:ctrlp_status_func'*
 Use this to customize the statuslines for the CtrlP window: >
   let g:ctrlp_status_func = {}
@@ -417,6 +420,18 @@ Structure of the functions: >
 <
 See https://gist.github.com/1610859 for a working example.
 
+                                                        *'g:ctrlp_buffer_func'*
+Specify the functions that will be called after entering and before exiting the
+CtrlP buffer: >
+  let g:ctrlp_buffer_func = {}
+<
+Example: >
+  let g:ctrlp_buffer_func = {
+    \ 'enter': 'Function_Name_1',
+    \ 'exit':  'Function_Name_2',
+    \ }
+<
+
                                                          *'g:ctrlp_match_func'*
 Set an external fuzzy matching function for CtrlP to use: >
   let g:ctrlp_match_func = {}
@@ -904,14 +919,15 @@ Special thanks:~
 ===============================================================================
 CHANGELOG                                                     *ctrlp-changelog*
 
+    + New option: |g:ctrlp_buffer_func|, callback functions for CtrlP buffer.
     + Remove: g:ctrlp_mruf_last_entered, make it a default for MRU mode.
     + New commands: |:CtrlPLastMode|, open CtrlP in the last mode used.
                     |:CtrlPMixed|, search in files, buffers and MRU files.
 
 Before 2012/03/31~
 
-    + New option: |g:ctrlp_default_input|, default input when entering CtrlP.
-                  |g:ctrlp_match_func|, allow using a custom fuzzy matcher.
+    + New options: |g:ctrlp_default_input|, default input when entering CtrlP.
+                   |g:ctrlp_match_func|, allow using a custom fuzzy matcher.
     + Rename:
         *ClearCtrlPCache* -> |CtrlPClearCache|
         *ClearAllCtrlPCaches* -> |CtrlPClearAllCaches|