Allow :CtrlPLine to take a bufname argument

Closes #396

autoload/ctrlp/buffertag.vim

@@ -248,7 +248,9 @@ endf
 fu! ctrlp#buffertag#cmd(mode, ...)
 	let s:btmode = a:mode
 	if a:0 && !empty(a:1)
-		let s:bufname = fnamemodify(a:1, ':p')
+		let s:btmode = 0
+		let bname = a:1 =~# '^%$\|^#\d*$' ? expand(a:1) : a:1
+		let s:bufname = fnamemodify(bname, ':p')
 	en
 	retu s:id
 endf

autoload/ctrlp/changes.vim

@@ -83,7 +83,9 @@ endf
 fu! ctrlp#changes#cmd(mode, ...)
 	let s:clmode = a:mode
 	if a:0 && !empty(a:1)
-		let s:bufnr = bufnr('^'.fnamemodify(a:1, ':p').'$')
+		let s:clmode = 0
+		let bname = a:1 =~# '^%$\|^#\d*$' ? expand(a:1) : a:1
+		let s:bufnr = bufnr('^'.fnamemodify(bname, ':p').'$')
 	en
 	retu s:id
 endf

autoload/ctrlp/line.vim

@@ -11,7 +11,7 @@ en
 let g:loaded_ctrlp_line = 1
 
 cal add(g:ctrlp_ext_vars, {
-	\ 'init': 'ctrlp#line#init()',
+	\ 'init': 'ctrlp#line#init(s:crbufnr)',
 	\ 'accept': 'ctrlp#line#accept',
 	\ 'lname': 'lines',
 	\ 'sname': 'lns',
@@ -29,8 +29,9 @@ fu! s:syntax()
 	en
 endf
 " Public {{{1
-fu! ctrlp#line#init()
-	let [bufs, lines] = [ctrlp#buffers('id'), []]
+fu! ctrlp#line#init(bufnr)
+	let [lines, bufnr] = [[], exists('s:bufnr') ? s:bufnr : a:bufnr]
+	let bufs = exists('s:lnmode') && s:lnmode ? ctrlp#buffers('id') : [bufnr]
 	for bufnr in bufs
 		let [lfb, bufn] = [getbufline(bufnr, 1, '$'), bufname(bufnr)]
 		if lfb == [] && bufn != ''
@@ -57,7 +58,13 @@ fu! ctrlp#line#accept(mode, str)
 	en
 endf
 
-fu! ctrlp#line#id()
+fu! ctrlp#line#cmd(mode, ...)
+	let s:lnmode = a:mode
+	if a:0 && !empty(a:1)
+		let s:lnmode = 0
+		let bname = a:1 =~# '^%$\|^#\d*$' ? expand(a:1) : a:1
+		let s:bufnr = bufnr('^'.fnamemodify(bname, ':p').'$')
+	en
 	retu s:id
 endf
 "}}}

doc/ctrlp.txt

@@ -1106,8 +1106,8 @@ Available extensions:~
                                                                    *:CtrlPLine*
   * Line mode:~
     - Name: 'line'
-    - Command: ":CtrlPLine"
-    - Search for a line in all listed buffers.
+    - Command: ":CtrlPLine [buffer]"
+    - Search for a line in all listed buffers or in the specified [buffer].
 
                                                                  *:CtrlPChange*
                                                               *:CtrlPChangeAll*

plugin/ctrlp.vim

@@ -51,7 +51,9 @@ com! -n=? -com=buffer CtrlPBufTag
 com! -bar CtrlPBufTagAll cal ctrlp#init(ctrlp#buffertag#cmd(1))
 com! -bar CtrlPRTS       cal ctrlp#init(ctrlp#rtscript#id())
 com! -bar CtrlPUndo      cal ctrlp#init(ctrlp#undo#id())
-com! -bar CtrlPLine      cal ctrlp#init(ctrlp#line#id())
+
+com! -n=? -com=buffer CtrlPLine
+	\ cal ctrlp#init(ctrlp#line#cmd(1, <q-args>))
 
 com! -n=? -com=buffer CtrlPChange
 	\ cal ctrlp#init(ctrlp#changes#cmd(0, <q-args>))