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- ;;; buff-menu.el --- buffer menu main function and support functions.
-
- ;; Copyright (C) 1985, 86, 87, 93, 94, 95 Free Software Foundation, Inc.
-
- ;; Maintainer: FSF
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs is free software; you can redistribute it and/or modify
- ;; it under the terms of the GNU General Public License as published by
- ;; the Free Software Foundation; either version 2, or (at your option)
- ;; any later version.
-
- ;; GNU Emacs is distributed in the hope that it will be useful,
- ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
- ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ;; 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, Inc., 59 Temple Place - Suite 330,
- ;; Boston, MA 02111-1307, 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:
-
- ;;;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'.")
-
- ; 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-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 "\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 "d" 'Buffer-menu-delete)
- (define-key Buffer-menu-mode-map "k" 'Buffer-menu-delete)
- (define-key Buffer-menu-mode-map "\C-d" 'Buffer-menu-delete-backwards)
- (define-key Buffer-menu-mode-map "\C-k" 'Buffer-menu-delete)
- (define-key Buffer-menu-mode-map "x" 'Buffer-menu-execute)
- (define-key Buffer-menu-mode-map " " 'next-line)
- (define-key Buffer-menu-mode-map "n" 'next-line)
- (define-key Buffer-menu-mode-map "p" 'previous-line)
- (define-key Buffer-menu-mode-map "\177" 'Buffer-menu-backup-unmark)
- (define-key Buffer-menu-mode-map "~" 'Buffer-menu-not-modified)
- (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 "%" 'Buffer-menu-toggle-read-only)
- (define-key Buffer-menu-mode-map "g" 'revert-buffer)
- (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)
-
- (defun Buffer-menu-mode ()
- "Major mode for editing a list of buffers.
- Each line describes one of the buffers in Emacs.
- Letters do not insert themselves; instead, they are commands.
- \\<Buffer-menu-mode-map>
- \\[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-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] -- mark that buffer to be deleted, 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.
- 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 major-mode 'Buffer-menu-mode)
- (setq mode-name "Buffer Menu")
- (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-function (ignore1 ignore2)
- (list-buffers))
-
- (defun Buffer-menu-buffer (error-if-non-existent-p)
- "Return buffer described by this line of buffer menu."
- (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))))
-
- (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."
- (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))
- (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."))
-
- (defun Buffer-menu-quit ()
- "Quit the buffer menu."
- (interactive)
- (let ((buffer (current-buffer)))
- ;; Switch away from the buffer menu and bury it.
- (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."
- (interactive)
- (beginning-of-line)
- (if (looking-at " [-M]")
- (ding)
- (let ((buffer-read-only nil))
- (delete-char 1)
- (insert ?>)
- (forward-line 1))))
-
- (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)
- (let* ((buf (Buffer-menu-buffer t))
- (mod (buffer-modified-p buf))
- (readonly (save-excursion (set-buffer buf) buffer-read-only))
- (buffer-read-only nil))
- (delete-char 3)
- (insert (if readonly (if mod " *%" " %") (if mod " * " " ")))))
- (forward-line (if backup -1 1)))
-
- (defun Buffer-menu-backup-unmark ()
- "Move up and cancel all requested operations on buffer on line above."
- (interactive)
- (forward-line -1)
- (Buffer-menu-unmark)
- (forward-line -1))
-
- (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))
- (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. 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)
- (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 (&optional arg)
- "Mark buffer on this line as unmodified (no changes to save)."
- (interactive "P")
- (save-excursion
- (set-buffer (Buffer-menu-buffer t))
- (set-buffer-modified-p arg))
- (save-excursion
- (beginning-of-line)
- (forward-char 1)
- (if (= (char-after (point)) (if arg ? ?*))
- (let ((buffer-read-only nil))
- (delete-char 1)
- (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."
- (interactive)
- (save-excursion
- (goto-char (point-min))
- (forward-line 1)
- (while (re-search-forward "^.S" nil t)
- (let ((modp nil))
- (save-excursion
- (set-buffer (Buffer-menu-buffer t))
- (save-buffer)
- (setq modp (buffer-modified-p)))
- (let ((buffer-read-only nil))
- (delete-char -1)
- (insert (if modp ?* ? ))))))
- (save-excursion
- (goto-char (point-min))
- (forward-line 1)
- (let ((buff-menu-buffer (current-buffer))
- (buffer-read-only nil))
- (while (search-forward "\nD" nil t)
- (forward-char -1)
- (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)
- (progn (delete-char 1)
- (insert ? ))
- (delete-region (point) (progn (forward-line 1) (point)))
- (forward-char -1))))))
-
- (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.
- This command deletes and replaces all the previously existing windows
- in the selected frame."
- (interactive)
- (let ((buff (Buffer-menu-buffer t))
- (menu (current-buffer))
- (others ())
- tem)
- (goto-char (point-min))
- (while (search-forward "\n>" nil t)
- (setq tem (Buffer-menu-buffer t))
- (let ((buffer-read-only nil))
- (delete-char -1)
- (insert ?\ ))
- (or (eq tem buff) (memq tem others) (setq others (cons tem others))))
- (setq others (nreverse others)
- tem (/ (1- (frame-height)) (1+ (length others))))
- (delete-other-windows)
- (switch-to-buffer buff)
- (or (eq menu buff)
- (bury-buffer menu))
- (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!
- )))
-
-
-
- (defun Buffer-menu-visit-tags-table ()
- "Visit the tags table in the buffer on this line. See `visit-tags-table'."
- (interactive)
- (let ((file (buffer-file-name (Buffer-menu-buffer t))))
- (if file
- (visit-tags-table file)
- (error "Specified buffer has no file"))))
-
- (defun Buffer-menu-1-window ()
- "Select this line's buffer, alone, in full frame."
- (interactive)
- (switch-to-buffer (Buffer-menu-buffer t))
- (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)))
- (if (and (window-dedicated-p (selected-window))
- (eq (selected-window) (frame-root-window)))
- (switch-to-buffer-other-frame buffer)
- (switch-to-buffer buffer))))
-
- (defun Buffer-menu-this-window ()
- "Select this line's buffer in this window."
- (interactive)
- (switch-to-buffer (Buffer-menu-buffer t)))
-
- (defun Buffer-menu-other-window ()
- "Select this line's buffer in other window, leaving buffer menu visible."
- (interactive)
- (switch-to-buffer-other-window (Buffer-menu-buffer t)))
-
- (defun Buffer-menu-switch-other-window ()
- "Make the other window select this line's buffer.
- The current window remains selected."
- (interactive)
- (display-buffer (Buffer-menu-buffer t)))
-
- (defun Buffer-menu-2-window ()
- "Select this line's buffer, with previous buffer in second 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))))))
-
-
-
- (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
-