-;;; buff-menu.el --- buffer menu main function and support functions.
+;;; buff-menu.el --- buffer menu main function and support functions
-;; Copyright (C) 1985, 86, 87, 93, 94, 95 Free Software Foundation, Inc.
+;; Copyright (C) 1985, 86, 87, 93, 94, 95, 2000, 2001
+;; Free Software Foundation, Inc.
;; Maintainer: FSF
+;; Keywords: convenience
;; This file is part of GNU Emacs.
;; 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',
+;; them by filename. The single entry point is `list-buffers',
;; normally bound to C-x C-b.
;;; Change Log:
;; Based on FSF code dating back to 1985.
;;; Code:
-
+
;;;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
(let* ((where (save-excursion
(beginning-of-line)
(+ (point) Buffer-menu-buffer-column)))
- (name (and (not (eobp)) (get-text-property where 'buffer-name))))
+ (name (and (not (eobp)) (get-text-property where 'buffer-name)))
+ (buf (and (not (eobp)) (get-text-property where 'buffer))))
(if name
(or (get-buffer name)
+ (and buf (buffer-name buf) buf)
(if error-if-non-existent-p
(error "No buffer named `%s'" name)
nil))
+ (or (and buf (buffer-name buf) buf)
(if error-if-non-existent-p
(error "No buffer on this line")
- nil))))
+ 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."
+Type q to remove the buffer menu from the display.
+
+The first column shows `>' for a buffer you have
+marked to be displayed, `D' for one you have marked for
+deletion, and `.' for the current buffer.
+
+The M column has a `*' if it is modified,
+or `S' if you have marked it for saving.
+The R column has a `%' if the buffer is read-only.
+After this come the buffer name, its size in characters,
+its major mode, and the visited file name (if any)."
(interactive "P")
;;; (setq Buffer-menu-window-config (current-window-configuration))
(switch-to-buffer (list-buffers-noselect arg))
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."
+Type q to remove the buffer menu from the display.
+For more information, see the function `buffer-menu'."
(interactive "P")
;;; (setq Buffer-menu-window-config (current-window-configuration))
(switch-to-buffer-other-window (list-buffers-noselect arg))
(let ((buf (Buffer-menu-buffer nil)))
(or (eq buf nil)
(eq buf buff-menu-buffer)
- (save-excursion (kill-buffer buf))))
- (if (Buffer-menu-buffer nil)
+ (save-excursion (kill-buffer buf)))
+ (if (and buf (buffer-name buf))
(progn (delete-char 1)
(insert ? ))
(delete-region (point) (progn (forward-line 1) (point)))
- (forward-char -1))))))
+ (forward-char -1)))))))
(defun Buffer-menu-select ()
"Select this line's buffer; also display buffers marked with `>'.
in the selected frame."
(interactive)
(let ((buff (Buffer-menu-buffer t))
- (menu (current-buffer))
+ (menu (current-buffer))
(others ())
tem)
(goto-char (point-min))
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."
+For more information, see the function `buffer-menu'."
(interactive "P")
(display-buffer (list-buffers-noselect files-only)))
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."
+For more information, see the function `buffer-menu'."
(let ((old-buffer (current-buffer))
(standard-output standard-output)
desired-point)
")
;; 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 (abbreviate-file-name file)))
- (princ "\n"))))
- (setq bl (cdr bl))))
+ (dolist (buffer (buffer-list))
+ (let ((name (buffer-name buffer))
+ (file (buffer-file-name buffer))
+ this-buffer-line-start
+ this-buffer-read-only
+ (this-buffer-size (buffer-size buffer))
+ this-buffer-mode-name
+ this-buffer-directory)
+ (with-current-buffer buffer
+ (setq this-buffer-read-only buffer-read-only
+ this-buffer-mode-name mode-name)
+ (unless file
+ ;; No visited file. Check local value of
+ ;; list-buffers-directory.
+ (when (and (boundp 'list-buffers-directory)
+ list-buffers-directory)
+ (setq this-buffer-directory list-buffers-directory))))
+ (cond
+ ;; Don't mention internal buffers.
+ ((and (string= (substring name 0 1) " ") (null file)))
+ ;; Maybe don't mention buffers without files.
+ ((and files-only (not file)))
+ ((string= name "*Buffer List*"))
+ ;; 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 (point)
+ 'buffer buffer)
+ (put-text-property this-buffer-line-start name-end
+ 'mouse-face 'highlight)
+ (put-text-property this-buffer-line-start name-end
+ 'help-echo "mouse-2: select this buffer"))
+ (let ((size (format "%8d" this-buffer-size))
+ (mode this-buffer-mode-name)
+ (excess (- (current-column) 17)))
+ (while (and (> excess 0) (= (aref size 0) ?\ ))
+ (setq size (substring size 1)
+ excess (1- excess)))
+ (princ size)
+ (indent-to 27 1)
+ (princ mode))
+ (indent-to 40 1)
+ (or file (setq file this-buffer-directory))
+ (when file
+ (princ (abbreviate-file-name file)))
+ (princ "\n")))))
(Buffer-menu-mode)
;; DESIRED-POINT doesn't have to be set; it is not when the
;; current buffer is not displayed for some reason.
HCoop / bpt / emacs.git / blobdiff