Fix gf on render :layout in views

Closes tpope#149.

Author: tpope

autoload/rails.vim

@@ -1917,6 +1917,13 @@ function! s:RailsFind()
   let res = s:findamethod('\%(match\|get\|put\|post\|delete\|redirect\)\s*(\=\s*[:''"][^''"]*[''"]\=\s*\%(\%(,\s*:to\s*\)\==>\|,\s*to:\)\s*','app/controllers/\1')
   if res =~ '#'|return s:sub(res,'#','_controller.rb#')|endif
 
+  if !buffer.type_name('controller', 'mailer')
+    let res = s:sub(s:sub(s:findasymbol('layout','\1'),'^/',''),'[^/]+$','_&')
+    if res != ""|return res."\n".s:findview(res)|endif
+    let res = s:sub(s:sub(s:findfromview('render\s*(\=\s*\%(:layout\s\+=>\|layout:\)\s*','\1'),'^/',''),'[^/]+$','_&')
+    if res != ""|return res."\n".s:findview(res)|endif
+  endif
+
   let res = s:findamethod('layout','\=s:findlayout(submatch(1))')
   if res != ""|return res|endif
 
@@ -2046,7 +2053,7 @@ function! s:RailsIncludefind(str,...)
   if a:str =~# '\u'
     " Classes should always be in .rb files
     let str .= '.rb'
-  elseif line =~# ':partial\s*=>\s*'
+  elseif line =~# ':partial\s*=>\s*' || (line =~# ':layout\s*=>\s*' && !rails#buffer().type_name('controller', 'mailer'))
     let str = s:sub(str,'[^/]+$','_&')
     let str = s:findview(str)
   elseif line =~# '\<layout\s*(\=\s*' || line =~# ':layout\s*=>\s*'