Re: PATCH: Fix IDO interaction with uniquify.el

["Óscar Fuentes" <ofv@wanadoo.es>]

Juanma Barranquero <lekktu@gmail.com> writes:

> BTW, why
>
>> +  (kill-buffer buf)
>> +  (if (get-buffer buf)
>
> `kill-buffer' returns t iff it was able to kill the buffer, so
>
>   (if (not (kill-buffer buf))
>
> should be enough...

This patch incorporates your suggestion and removes an unneeded call to
ido-set-matches.

2010-01-18  Óscar Fuentes  <ofv@wanadoo.es>

	* ido.el (ido-cur-list): Initialize as nil. Remove obsolete
          information from commentary.
          (ido-choice-list): Initialize as nil.
          (ido-get-bufname): Reject minibuffers.
          (ido-make-buffer-list): If "default" is a nonexistent
          buffer, ignore it, as per the docstring.
          (ido-kill-buffer-internal): New function.
          (ido-kill-buffer-at-head): Use it.
          (ido-visit-buffer): Likewise.

=== modified file 'lisp/ido.el'
--- lisp/ido.el	2010-01-13 08:35:10 +0000
+++ lisp/ido.el	2010-01-18 14:35:24 +0000
@@ -1042,11 +1042,11 @@
 ;; Stores the current list of items that will be searched through.
 ;; The list is ordered, so that the most interesting item comes first,
 ;; although by default, the files visible in the current frame are put
-;; at the end of the list.  Created by `ido-make-item-list'.
-(defvar ido-cur-list)
+;; at the end of the list.
+(defvar ido-cur-list nil)
 
 ;; Stores the choice list for ido-completing-read
-(defvar ido-choice-list)
+(defvar ido-choice-list nil)
 
 ;; Stores the list of items which are ignored when building
 ;; `ido-cur-list'.  It is in no specific order.
@@ -3344,7 +3344,7 @@
     (if ido-temp-list
 	(nconc ido-temp-list ido-current-buffers)
       (setq ido-temp-list ido-current-buffers))
-    (if default
+    (if (and default (buffer-live-p (get-buffer default)))
 	(progn
 	  (setq ido-temp-list
 		(delete default ido-temp-list))
@@ -3590,6 +3590,7 @@
   ;; Used by `ido-get-buffers-in-frames' to walk through all windows
   (let ((buf (buffer-name (window-buffer win))))
 	(unless (or (member buf ido-bufs-in-frame)
+		    (minibufferp buf)
 		    (member buf ido-ignore-item-temp-list))
 	  ;; Only add buf if it is not already in list.
 	  ;; This prevents same buf in two different windows being
@@ -3830,6 +3831,30 @@
 	      ;;(add-hook 'completion-setup-hook 'completion-setup-function)
 	      (display-completion-list completion-list)))))))
 
+(defun ido-kill-buffer-internal (buf)
+  "Actually kill the buffer and check if it is needed to rebuild
+the list of known buffers."
+  (if (not (kill-buffer buf))
+      ;; buffer couldn't be killed.
+      (setq ido-rescan t)
+    (let ((next-buf (cadr ido-matches))
+	  (needs-update nil))
+      ;; else buffer was killed so remove name from list.
+      (setq ido-cur-list (delq buf ido-cur-list))
+      ;; Some packages, like uniquify.el, may rename buffers when one
+      ;; is killed, so we need to test this condition to avoid using
+      ;; an outdated list of buffer names. We don't want to always
+      ;; rebuild the list of buffers, as this alters the previous
+      ;; buffer order that the user was seeing on the prompt. However,
+      ;; when we rebuild the list, we try to keep the previous second
+      ;; buffer as the first one.
+      (dolist (b ido-cur-list)
+	(if (not (get-buffer b))
+	    (setq needs-update t)))
+      (when needs-update
+	(setq ido-cur-list (ido-make-buffer-list next-buf))
+	(setq ido-rescan t)))))
+
 ;;; KILL CURRENT BUFFER
 (defun ido-kill-buffer-at-head ()
   "Kill the buffer at the head of `ido-matches'.
@@ -3840,7 +3865,7 @@
     (let ((enable-recursive-minibuffers t)
 	  (buf (ido-name (car ido-matches))))
       (when buf
-	(kill-buffer buf)
+	(ido-kill-buffer-internal buf)
 	;; Check if buffer still exists.
 	(if (get-buffer buf)
 	    ;; buffer couldn't be killed.
@@ -3884,7 +3909,7 @@
      ((eq method 'kill)
       (if record
 	  (ido-record-command 'kill-buffer buffer))
-      (kill-buffer buffer))
+      (ido-kill-buffer-internal buffer))
 
      ((eq method 'other-window)
       (if record