;;; buff-menu.el --- buffer menu main function and support functions.
-;; Maintainer: FSF
-;; Last-Modified: 09 Jul 1992
+;; Copyright (C) 1985, 1986, 1987, 1993 Free Software Foundation, Inc.
-;; Copyright (C) 1985, 1986, 1987, 1992 Free Software Foundation, Inc.
+;; Maintainer: FSF
;; This file is part of GNU Emacs.
;; along with GNU Emacs; see the file COPYING. If not, write to
;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+;;; Commentary:
+
+;; Edit, delete, or change attributes of all currently active Emacs
+;; buffers from a list summarizing their state. A good way to browse
+;; any special or scratch buffers you have loaded, since you can't find
+;; them by filename. The single entry point is `Buffer-menu-mode',
+;; normally bound to C-x C-b.
+
+;;; Change Log:
+
+;; Merged by esr with recent mods to Emacs 19 buff-menu, 23 Mar 1993
+;;
+;; Modified by Bob Weiner, Motorola, Inc., 4/14/89
+;;
+;; Added optional backup argument to 'Buffer-menu-unmark' to make it undelete
+;; current entry and then move to previous one.
+;;
+;; Based on FSF code dating back to 1985.
+
;;; Code:
+
+;;;Not needed, now that q is now just quit and Buffer-menu-select is v.
+;;;(defvar Buffer-menu-window-config nil
+;;; "Window configuration saved from entry to `buffer-menu'.")
; Put buffer *Buffer List* into proper mode right away
; so that from now on even list-buffers is enough to get a buffer menu.
+(defvar Buffer-menu-buffer-column nil)
+
(defvar Buffer-menu-mode-map nil "")
(if Buffer-menu-mode-map
()
(setq Buffer-menu-mode-map (make-keymap))
(suppress-keymap Buffer-menu-mode-map t)
- (define-key Buffer-menu-mode-map "q" 'Buffer-menu-select)
+ (define-key Buffer-menu-mode-map "q" 'Buffer-menu-quit)
+ (define-key Buffer-menu-mode-map "v" 'Buffer-menu-select)
(define-key Buffer-menu-mode-map "2" 'Buffer-menu-2-window)
(define-key Buffer-menu-mode-map "1" 'Buffer-menu-1-window)
(define-key Buffer-menu-mode-map "f" 'Buffer-menu-this-window)
(define-key Buffer-menu-mode-map "?" 'describe-mode)
(define-key Buffer-menu-mode-map "u" 'Buffer-menu-unmark)
(define-key Buffer-menu-mode-map "m" 'Buffer-menu-mark)
- (define-key Buffer-menu-mode-map "t" 'Buffer-menu-visit-tags-table))
+ (define-key Buffer-menu-mode-map "t" 'Buffer-menu-visit-tags-table)
+ (define-key Buffer-menu-mode-map "%" 'Buffer-menu-toggle-read-only)
+ (define-key Buffer-menu-mode-map [mouse-2] 'Buffer-menu-mouse-select)
+)
;; Buffer Menu mode is suitable only for specially formatted data.
(put 'Buffer-menu-mode 'mode-class 'special)
Each line describes one of the buffers in Emacs.
Letters do not insert themselves; instead, they are commands.
\\<Buffer-menu-mode-map>
-\\[Buffer-menu-mark] -- mark buffer to be displayed.
-\\[Buffer-menu-select] -- select buffer of line point is on.
- Also show buffers marked with m in other windows.
+\\[Buffer-menu-mouse-select] -- select buffer you click on, in place of the buffer menu.
+\\[Buffer-menu-this-window] -- select current line's buffer in place of the buffer menu.
+\\[Buffer-menu-other-window] -- select that buffer in another window,
+ so the buffer menu buffer remains visible in its window.
+\\[Buffer-menu-switch-other-window] -- make another window display that buffer.
+\\[Buffer-menu-mark] -- mark current line's buffer to be displayed.
+\\[Buffer-menu-select] -- select current line's buffer.
+ Also show buffers marked with m, in other windows.
\\[Buffer-menu-1-window] -- select that buffer in full-frame window.
\\[Buffer-menu-2-window] -- select that buffer in one window,
together with buffer selected before this one in another window.
-\\[Buffer-menu-this-window] -- select that buffer in place of the buffer menu buffer.
-\\[Buffer-menu-other-window] -- select that buffer in another window,
- so the buffer menu buffer remains visible in its window.
-\\[Buffer-menu-switch-other-window] -- switch the other window to this buffer.
\\[Buffer-menu-visit-tags-table] -- visit-tags-table this buffer.
\\[Buffer-menu-not-modified] -- clear modified-flag on that buffer.
\\[Buffer-menu-save] -- mark that buffer to be saved, and move down.
\\[Buffer-menu-delete-backwards] -- mark that buffer to be deleted, and move up.
\\[Buffer-menu-execute] -- delete or save marked buffers.
\\[Buffer-menu-unmark] -- remove all kinds of marks from current line.
-\\[Buffer-menu-backup-unmark] -- back up a line and remove marks."
+ With prefix argument, also move up one line.
+\\[Buffer-menu-backup-unmark] -- back up a line and remove marks.
+\\[Buffer-menu-toggle-read-only] -- toggle read-only status of buffer on this line."
(kill-all-local-variables)
(use-local-map Buffer-menu-mode-map)
- (setq truncate-lines t)
- (setq buffer-read-only t)
(setq major-mode 'Buffer-menu-mode)
(setq mode-name "Buffer Menu")
+ (save-excursion
+ (goto-char (point-min))
+ (search-forward "Buffer")
+ (backward-word 1)
+ (setq Buffer-menu-buffer-column (current-column))
+ (forward-line 2)
+ (while (not (eobp))
+ (let ((where (Buffer-menu-buffer-name-position)))
+ (put-text-property (car where) (cdr where) 'mouse-face 'highlight))
+ (forward-line 1)))
+ (setq truncate-lines t)
+ (setq buffer-read-only t)
(run-hooks 'buffer-menu-mode-hook))
\f
-(defvar Buffer-menu-buffer-column 4)
-
(defun Buffer-menu-buffer (error-if-non-existent-p)
"Return buffer described by this line of buffer menu."
+ (let* ((where (Buffer-menu-buffer-name-position))
+ (string (buffer-substring (car where) (cdr where))))
+ (or (get-buffer string)
+ (if error-if-non-existent-p
+ (error "No buffer named \"%s\"" string)
+ nil))))
+
+;; Find the start and end positions of the buffer name on this line.
+;; Returns a cons (START . END).
+(defun Buffer-menu-buffer-name-position ()
(save-excursion
(beginning-of-line)
(forward-char Buffer-menu-buffer-column)
- (let ((start (point))
- string)
- ;; End of buffer name marked by tab or two spaces.
+ (let ((start (point)))
(re-search-forward "\t\\| ")
(skip-chars-backward " \t")
- (setq string (buffer-substring start (point)))
- (or (get-buffer string)
- (if error-if-non-existent-p
- (error "No buffer named \"%s\"" string)
- nil)))))
+ (cons start (point)))))
\f
(defun buffer-menu (&optional arg)
"Make a menu of buffers so you can save, delete or select them.
With argument, show only buffers that are visiting files.
Type ? after invocation to get help on commands available.
-Type q immediately to make the buffer menu go away."
+Type q immediately to make the buffer menu go away and to restore
+previous window configuration."
(interactive "P")
+;;; (setq Buffer-menu-window-config (current-window-configuration))
(list-buffers arg)
(pop-to-buffer "*Buffer List*")
(forward-line 2)
(message
- "Commands: d, s, x; 1, 2, m, u, q; delete; ~; ? for help."))
+ "Commands: d, s, x, u; f, o, 1, 2, m, v; ~, %%; q to quit; ? for help."))
+
+(defun Buffer-menu-quit ()
+ "Quit the buffer menu."
+ (interactive)
+ (let ((buffer (current-buffer)))
+ ;; Restore previous window configuration before displaying
+ ;; selected buffers.
+ (switch-to-buffer (other-buffer))
+ (bury-buffer buffer)))
(defun Buffer-menu-mark ()
"Mark buffer on this line for being displayed by \\<Buffer-menu-mode-map>\\[Buffer-menu-select] command."
(insert ?>)
(forward-line 1))))
-(defun Buffer-menu-unmark ()
- "Cancel all requested operations on buffer on this line."
- (interactive)
+(defun Buffer-menu-unmark (&optional backup)
+ "Cancel all requested operations on buffer on this line and move down.
+Optional ARG means move up."
+ (interactive "P")
(beginning-of-line)
(if (looking-at " [-M]")
(ding)
(buffer-read-only nil))
(delete-char 3)
(insert (if readonly (if mod " *%" " %") (if mod " * " " ")))))
- (forward-line 1))
+ (forward-line (if backup -1 1)))
(defun Buffer-menu-backup-unmark ()
"Move up and cancel all requested operations on buffer on line above."
(switch-to-buffer buff)
(or (eq menu buff)
(bury-buffer menu))
- (while others
- (split-window nil tem)
- (other-window 1)
- (switch-to-buffer (car others))
- (setq others (cdr others)))
- (other-window 1))) ;back to the beginning!
+ (if (equal (length others) 0)
+ (progn
+;;; ;; Restore previous window configuration before displaying
+;;; ;; selected buffers.
+;;; (if Buffer-menu-window-config
+;;; (progn
+;;; (set-window-configuration Buffer-menu-window-config)
+;;; (setq Buffer-menu-window-config nil)))
+ (switch-to-buffer buff))
+ (while others
+ (split-window nil tem)
+ (other-window 1)
+ (switch-to-buffer (car others))
+ (setq others (cdr others)))
+ (other-window 1) ;back to the beginning!
+)))
+
\f
(defun Buffer-menu-visit-tags-table ()
"Visit the tags table in the buffer on this line. See `visit-tags-table'."
(bury-buffer (other-buffer))
(delete-other-windows))
+(defun Buffer-menu-mouse-select (event)
+ "Select the buffer whose line you click on."
+ (interactive "e")
+ (let (buffer)
+ (save-excursion
+ (set-buffer (window-buffer (posn-window (event-end event))))
+ (save-excursion
+ (goto-char (posn-point (event-end event)))
+ (setq buffer (Buffer-menu-buffer t))))
+ (select-window (posn-window (event-end event)))
+ (switch-to-buffer buffer)))
+
(defun Buffer-menu-this-window ()
"Select this line's buffer in this window."
(interactive)
(let ((buff (Buffer-menu-buffer t))
(menu (current-buffer))
(pop-up-windows t))
+ (delete-other-windows)
(switch-to-buffer (other-buffer))
(pop-to-buffer buff)
(bury-buffer menu)))
+(defun Buffer-menu-toggle-read-only ()
+ "Toggle read-only status of buffer on this line, perhaps via version control."
+ (interactive)
+ (let (char)
+ (save-excursion
+ (set-buffer (Buffer-menu-buffer t))
+ (vc-toggle-read-only)
+ (setq char (if buffer-read-only ?% ? )))
+ (save-excursion
+ (beginning-of-line)
+ (forward-char 2)
+ (if (/= (following-char) char)
+ (let (buffer-read-only)
+ (delete-char 1)
+ (insert char))))))
+
;;; buff-menu.el ends here