;;; buff-menu.el --- buffer menu main function and support functions.
-;; Copyright (C) 1985, 1986, 1987, 1993, 1994 Free Software Foundation, Inc.
+;; Copyright (C) 1985, 86, 87, 93, 94, 95 Free Software Foundation, Inc.
;; Maintainer: FSF
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to
-;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+;; along with GNU Emacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
;;; Commentary:
;;; Code:
-;;;Not needed, now that q is now just quit and Buffer-menu-select is v.
+;;;Trying to preserve the old window configuration works well in
+;;;simple scenarios, when you enter the buffer menu, use it, and exit it.
+;;;But it does strange things when you switch back to the buffer list buffer
+;;;with C-x b, later on, when the window configuration is different.
+;;;The choice seems to be, either restore the window configuration
+;;;in all cases, or in no cases.
+;;;I decided it was better not to restore the window config at all. -- rms.
+
+;;;But since then, I changed buffer-menu to use the selected window,
+;;;so q now once again goes back to the previous window configuration.
+
;;;(defvar Buffer-menu-window-config nil
;;; "Window configuration saved from entry to `buffer-menu'.")
(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 "\C-m" 'Buffer-menu-this-window)
(define-key Buffer-menu-mode-map "o" 'Buffer-menu-other-window)
(define-key Buffer-menu-mode-map "\C-o" 'Buffer-menu-switch-other-window)
(define-key Buffer-menu-mode-map "s" 'Buffer-menu-save)
(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 "%" 'Buffer-menu-toggle-read-only)
+ (define-key Buffer-menu-mode-map "g" 'Buffer-menu-revert)
(define-key Buffer-menu-mode-map [mouse-2] 'Buffer-menu-mouse-select)
)
\\[Buffer-menu-unmark] -- remove all kinds of marks from current line.
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."
+\\[Buffer-menu-toggle-read-only] -- toggle read-only status of buffer on this line.
+\\[Buffer-menu-revert] -- update the list of buffers."
(kill-all-local-variables)
(use-local-map Buffer-menu-mode-map)
(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)))
+ (make-local-variable 'revert-buffer-function)
+ (setq revert-buffer-function 'Buffer-menu-revert-function)
(setq truncate-lines t)
(setq buffer-read-only t)
(run-hooks 'buffer-menu-mode-hook))
+
+(defun Buffer-menu-revert ()
+ "Update the list of buffers."
+ (interactive)
+ (revert-buffer))
+
+(defun Buffer-menu-revert-function (ignore1 ignore2)
+ (list-buffers))
\f
(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)))
- (re-search-forward "\t\\| ")
- (skip-chars-backward " \t")
- (cons start (point)))))
+ (let* ((where (save-excursion
+ (beginning-of-line)
+ (+ (point) Buffer-menu-buffer-column)))
+ (name (and (not (eobp)) (get-text-property where 'buffer-name))))
+ (if name
+ (or (get-buffer name)
+ (if error-if-non-existent-p
+ (error "No buffer named `%s'" name)
+ nil))
+ (if error-if-non-existent-p
+ (error "No buffer on this line")
+ nil))))
\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 and to restore
-previous window configuration."
+Type q immediately to make the buffer menu go away."
+ (interactive "P")
+;;; (setq Buffer-menu-window-config (current-window-configuration))
+ (switch-to-buffer (list-buffers-noselect arg))
+ (message
+ "Commands: d, s, x, u; f, o, 1, 2, m, v; ~, %%; q to quit; ? for help."))
+
+(defun buffer-menu-other-window (&optional arg)
+ "Display a list of buffers in another window.
+With the buffer list buffer, you can save, delete or select the buffers.
+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."
(interactive "P")
;;; (setq Buffer-menu-window-config (current-window-configuration))
- (list-buffers arg)
- (pop-to-buffer "*Buffer List*")
- (forward-line 2)
+ (switch-to-buffer-other-window (list-buffers-noselect arg))
(message
"Commands: d, s, x, u; f, o, 1, 2, m, v; ~, %%; q to quit; ? for help."))
"Quit the buffer menu."
(interactive)
(let ((buffer (current-buffer)))
- ;; Restore previous window configuration before displaying
- ;; selected buffers.
+ ;; Switch away from the buffer menu and bury it.
(switch-to-buffer (other-buffer))
(bury-buffer buffer)))
(Buffer-menu-unmark)
(forward-line -1))
-(defun Buffer-menu-delete ()
- "Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command."
- (interactive)
+(defun Buffer-menu-delete (&optional arg)
+ "Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command.
+Prefix arg is how many buffers to delete.
+Negative arg means delete backwards."
+ (interactive "p")
(beginning-of-line)
(if (looking-at " [-M]") ;header lines
(ding)
(let ((buffer-read-only nil))
- (delete-char 1)
- (insert ?D)
- (forward-line 1))))
-
-(defun Buffer-menu-delete-backwards ()
+ (if (or (null arg) (= arg 0))
+ (setq arg 1))
+ (while (> arg 0)
+ (delete-char 1)
+ (insert ?D)
+ (forward-line 1)
+ (setq arg (1- arg)))
+ (while (< arg 0)
+ (delete-char 1)
+ (insert ?D)
+ (forward-line -1)
+ (setq arg (1+ arg))))))
+
+(defun Buffer-menu-delete-backwards (&optional arg)
"Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command
-and then move up one line"
- (interactive)
- (Buffer-menu-delete)
- (forward-line -2)
- (if (looking-at " [-M]") (forward-line 1)))
+and then move up one line. Prefix arg means move that many lines."
+ (interactive "p")
+ (Buffer-menu-delete (- (or arg 1)))
+ (while (looking-at " [-M]")
+ (forward-line 1)))
(defun Buffer-menu-save ()
"Mark buffer on this line to be saved by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command."
(interactive)
(beginning-of-line)
- (forward-char 1)
(if (looking-at " [-M]") ;header lines
(ding)
(let ((buffer-read-only nil))
+ (forward-char 1)
(delete-char 1)
(insert ?S)
(forward-line 1))))
-(defun Buffer-menu-not-modified ()
+(defun Buffer-menu-not-modified (&optional arg)
"Mark buffer on this line as unmodified (no changes to save)."
- (interactive)
+ (interactive "P")
(save-excursion
(set-buffer (Buffer-menu-buffer t))
- (set-buffer-modified-p nil))
+ (set-buffer-modified-p arg))
(save-excursion
(beginning-of-line)
(forward-char 1)
- (if (looking-at "\\*")
+ (if (= (char-after (point)) (if arg ? ?*))
(let ((buffer-read-only nil))
(delete-char 1)
- (insert ? )))))
+ (insert (if arg ?* ? ))))))
(defun Buffer-menu-execute ()
"Save and/or delete buffers marked with \\<Buffer-menu-mode-map>\\[Buffer-menu-save] or \\<Buffer-menu-mode-map>\\[Buffer-menu-delete] commands."
(defun Buffer-menu-select ()
"Select this line's buffer; also display buffers marked with `>'.
-You can mark buffers with the \\<Buffer-menu-mode-map>\\[Buffer-menu-mark] command."
+You can mark buffers with the \\<Buffer-menu-mode-map>\\[Buffer-menu-mark] command.
+This command deletes and replaces all the previously existing windows
+in the selected frame."
(interactive)
(let ((buff (Buffer-menu-buffer t))
(menu (current-buffer))
(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'."
(delete-char 1)
(insert char))))))
+\f
+
+(define-key ctl-x-map "\C-b" 'list-buffers)
+
+(defun list-buffers (&optional files-only)
+ "Display a list of names of existing buffers.
+The list is displayed in a buffer named `*Buffer List*'.
+Note that buffers with names starting with spaces are omitted.
+Non-null optional arg FILES-ONLY means mention only file buffers.
+
+The M column contains a * for buffers that are modified.
+The R column contains a % for buffers that are read-only."
+ (interactive "P")
+ (display-buffer (list-buffers-noselect files-only)))
+
+(defun list-buffers-noselect (&optional files-only)
+ "Create and return a buffer with a list of names of existing buffers.
+The buffer is named `*Buffer List*'.
+Note that buffers with names starting with spaces are omitted.
+Non-null optional arg FILES-ONLY means mention only file buffers.
+
+The M column contains a * for buffers that are modified.
+The R column contains a % for buffers that are read-only."
+ (let ((old-buffer (current-buffer))
+ (standard-output standard-output)
+ desired-point)
+ (save-excursion
+ (set-buffer (get-buffer-create "*Buffer List*"))
+ (setq buffer-read-only nil)
+ (erase-buffer)
+ (setq standard-output (current-buffer))
+ (princ "\
+ MR Buffer Size Mode File
+ -- ------ ---- ---- ----
+")
+ ;; Record the column where buffer names start.
+ (setq Buffer-menu-buffer-column 4)
+ (let ((bl (buffer-list)))
+ (while bl
+ (let* ((buffer (car bl))
+ (name (buffer-name buffer))
+ (file (buffer-file-name buffer))
+ this-buffer-line-start
+ this-buffer-read-only
+ this-buffer-size
+ this-buffer-mode-name
+ this-buffer-directory)
+ (save-excursion
+ (set-buffer buffer)
+ (setq this-buffer-read-only buffer-read-only)
+ (setq this-buffer-size (buffer-size))
+ (setq this-buffer-mode-name
+ (if (eq buffer standard-output)
+ "Buffer Menu" mode-name))
+ (or file
+ ;; No visited file. Check local value of
+ ;; list-buffers-directory.
+ (if (and (boundp 'list-buffers-directory)
+ list-buffers-directory)
+ (setq this-buffer-directory list-buffers-directory))))
+ (cond
+ ;; Don't mention internal buffers.
+ ((string= (substring name 0 1) " "))
+ ;; Maybe don't mention buffers without files.
+ ((and files-only (not file)))
+ ;; Otherwise output info.
+ (t
+ (setq this-buffer-line-start (point))
+ ;; Identify current buffer.
+ (if (eq buffer old-buffer)
+ (progn
+ (setq desired-point (point))
+ (princ "."))
+ (princ " "))
+ ;; Identify modified buffers.
+ (princ (if (buffer-modified-p buffer) "*" " "))
+ ;; Handle readonly status. The output buffer is special
+ ;; cased to appear readonly; it is actually made so at a later
+ ;; date.
+ (princ (if (or (eq buffer standard-output)
+ this-buffer-read-only)
+ "% "
+ " "))
+ (princ name)
+ ;; Put the buffer name into a text property
+ ;; so we don't have to extract it from the text.
+ ;; This way we avoid problems with unusual buffer names.
+ (setq this-buffer-line-start
+ (+ this-buffer-line-start Buffer-menu-buffer-column))
+ (let ((name-end (point)))
+ (indent-to 17 2)
+ (put-text-property this-buffer-line-start name-end
+ 'buffer-name name)
+ (put-text-property this-buffer-line-start name-end
+ 'mouse-face 'highlight))
+ (let (size
+ mode
+ (excess (- (current-column) 17)))
+ (setq size (format "%8d" this-buffer-size))
+ ;; Ack -- if looking at the *Buffer List* buffer,
+ ;; always use "Buffer Menu" mode. Otherwise the
+ ;; first time the buffer is created, the mode will be wrong.
+ (setq mode this-buffer-mode-name)
+ (while (and (> excess 0) (= (aref size 0) ?\ ))
+ (setq size (substring size 1))
+ (setq excess (1- excess)))
+ (princ size)
+ (indent-to 27 1)
+ (princ mode))
+ (indent-to 40 1)
+ (or file (setq file this-buffer-directory))
+ (if file
+ (princ file))
+ (princ "\n"))))
+ (setq bl (cdr bl))))
+ (Buffer-menu-mode)
+ ;; DESIRED-POINT doesn't have to be set; it is not when the
+ ;; current buffer is not displayed for some reason.
+ (and desired-point
+ (goto-char desired-point))
+ (current-buffer))))
+
;;; buff-menu.el ends here
HCoop / bpt / emacs.git / blobdiff