Extend '..' input

autoload/ctrlp.vim

@@ -863,9 +863,10 @@ fu! ctrlp#acceptfile(mode, line, ...)
 endf
 
 fu! s:SpecInputs(str)
-	if a:str == '..' && s:spi
-		cal s:parentdir(s:dyncwd)
-		cal ctrlp#setlines()
+	if a:str =~ '^\.\.\.*$' && s:spi
+		let cwd = s:dyncwd
+		cal ctrlp#setdir('../'.repeat('../', strlen(a:str) - 2))
+		if cwd != s:dyncwd | cal ctrlp#setlines() | en
 		cal s:PrtClear()
 		retu 1
 	elsei a:str == s:lash && s:spi
@@ -890,7 +891,7 @@ fu! s:AcceptSelection(mode)
 	" Get the selected line
 	let line = !empty(s:lines) ? s:lines[line('.') - 1] : ''
 	if a:mode != 'e' && !s:itemtype && line == ''
-		\ && str !~ '\v^(\.\.|/|\\|\?|\@.+)$'
+		\ && str !~ '\v^(\.\.\.*|/|\\|\?|\@.+)$'
 		cal s:CreateNewFile(a:mode) | retu
 	en
 	if empty(line) | retu | en
@@ -1248,11 +1249,6 @@ fu! ctrlp#rmbasedir(items)
 	retu a:items
 endf
 
-fu! s:parentdir(curr)
-	let parent = s:getparent(a:curr)
-	if parent != a:curr | cal ctrlp#setdir(parent) | en
-endf
-
 fu! s:getparent(item)
 	let parent = substitute(a:item, '[\/][^\/]\+[\/:]\?$', '', '')
 	if parent == '' || match(parent, '[\/]') < 0

doc/ctrlp.txt

@@ -746,8 +746,15 @@ c)  End the string with a colon ':' followed by a Vim command to execute that
 
     See also: Vim's |++opt| and |+cmd|.
 
-d)  Submit two dots '..' to go backward the directory tree by 1 level. If the
-    parent directory is large and uncached, this can be slow.
+d)  Submit two dots '..' to go backward the directory tree by 1 level. To go
+    backward multiple levels, use one extra dot for each extra level:
+>
+         Raw input    Interpreted as
+         ..           ../
+         ...          ../../
+         ....         ../../../
+<
+    Note: if the parent directories are large and uncached, this can be slow.
 
     You can also use '@cd path/' to change CtrlP's local working directory.
     Use '@cd %:h' to change to the directory of the current file.
@@ -1011,6 +1018,9 @@ Special thanks:~
 ===============================================================================
 CHANGELOG                                                     *ctrlp-changelog*
 
+Before 2012/05/15~
+
+    + Extend '..' (|ctrlp-input-formats| (d))
     + New input format: '@cd' (|ctrlp-input-formats| (d))
 
 Before 2012/04/30~