1 ;;; buff-menu.el --- buffer menu main function and support functions.
3 ;; Copyright (C) 1993 Free Software Foundation, Inc.
5 ;; Author: Bob Weiner <rsw@cs.brown.edu>
7 ;; Adapted-by: Eric S. Raymond <esr@snark.thyrsus.com>
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software; you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation; either version 2, or (at your option)
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs; see the file COPYING. If not, write to
23 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 ;; Edit, delete, or change attributes of all currently active Emacs
28 ;; buffers from a list summarizing thir state. A good way to browse
29 ;; any special or scratch buffers you have loaded, since you can't find
30 ;; them by filename. The single entry point is `Buffer-menu-mode',
31 ;; normally bound to C-x C-b.
35 ;; Merged by esr with recent mods to Emacs 19 buff-menu, 23 Mar 1993
37 ;; Modified by Bob Weiner, Motorola, Inc., 3/1/89
39 ;; Save window configuration when 'buffer-menu' is called so that
40 ;; previous window configuration is restored. prior to selecting
42 ;; Made 'Buffer-menu-select' also perform a 'Buffer-menu-execute'.
44 ;; Modified by Bob Weiner, Motorola, Inc., 4/14/89
46 ;; Added optional backup argument to 'Buffer-menu-unmark' to make it undelete
47 ;; current entry and then move to previous one.
49 ;; Based on FSF code dating back to 1985.
53 (defvar *buff-window-config
* nil
54 "Stores window configuration upon entry of 'buffer-menu'. Used to
55 restore window configuration when only one buffer is selected.")
57 ; Put buffer *Buffer List* into proper mode right away
58 ; so that from now on even list-buffers is enough to get a buffer menu.
60 (defvar Buffer-menu-mode-map nil
"")
62 (if Buffer-menu-mode-map
64 (setq Buffer-menu-mode-map
(make-keymap))
65 (suppress-keymap Buffer-menu-mode-map t
)
66 (define-key Buffer-menu-mode-map
"q" 'Buffer-menu-select
)
67 (define-key Buffer-menu-mode-map
"2" 'Buffer-menu-2-window
)
68 (define-key Buffer-menu-mode-map
"1" 'Buffer-menu-1-window
)
69 (define-key Buffer-menu-mode-map
"f" 'Buffer-menu-this-window
)
70 (define-key Buffer-menu-mode-map
"o" 'Buffer-menu-other-window
)
71 (define-key Buffer-menu-mode-map
"\C-o" 'Buffer-menu-switch-other-window
)
72 (define-key Buffer-menu-mode-map
"s" 'Buffer-menu-save
)
73 (define-key Buffer-menu-mode-map
"d" 'Buffer-menu-delete
)
74 (define-key Buffer-menu-mode-map
"k" 'Buffer-menu-delete
)
75 (define-key Buffer-menu-mode-map
"\C-d" 'Buffer-menu-delete-backwards
)
76 (define-key Buffer-menu-mode-map
"\C-k" 'Buffer-menu-delete
)
77 (define-key Buffer-menu-mode-map
"x" 'Buffer-menu-execute
)
78 (define-key Buffer-menu-mode-map
" " 'next-line
)
79 (define-key Buffer-menu-mode-map
"n" 'next-line
)
80 (define-key Buffer-menu-mode-map
"p" 'previous-line
)
81 (define-key Buffer-menu-mode-map
"\177" 'Buffer-menu-backup-unmark
)
82 (define-key Buffer-menu-mode-map
"~" 'Buffer-menu-not-modified
)
83 (define-key Buffer-menu-mode-map
"?" 'describe-mode
)
84 (define-key Buffer-menu-mode-map
"u" 'Buffer-menu-unmark
)
85 (define-key Buffer-menu-mode-map
"m" 'Buffer-menu-mark
)
86 (define-key Buffer-menu-mode-map
"t" 'Buffer-menu-visit-tags-table
))
88 ;; Buffer Menu mode is suitable only for specially formatted data.
89 (put 'Buffer-menu-mode
'mode-class
'special
)
91 (defun Buffer-menu-mode ()
92 "Major mode for editing a list of buffers.
93 Each line describes one of the buffers in Emacs.
94 Letters do not insert themselves; instead, they are commands.
95 \\<Buffer-menu-mode-map>
96 \\[Buffer-menu-mark] -- mark buffer to be displayed.
97 \\[Buffer-menu-select] -- select buffer of line point is on.
98 Also show buffers marked with m in other windows.
99 \\[Buffer-menu-1-window] -- select that buffer in full-frame window.
100 \\[Buffer-menu-2-window] -- select that buffer in one window,
101 together with buffer selected before this one in another window.
102 \\[Buffer-menu-this-window] -- select that buffer in place of the buffer menu buffer.
103 \\[Buffer-menu-other-window] -- select that buffer in another window,
104 so the buffer menu buffer remains visible in its window.
105 \\[Buffer-menu-switch-other-window] -- switch the other window to this buffer.
106 \\[Buffer-menu-visit-tags-table] -- visit-tags-table this buffer.
107 \\[Buffer-menu-not-modified] -- clear modified-flag on that buffer.
108 \\[Buffer-menu-save] -- mark that buffer to be saved, and move down.
109 \\[Buffer-menu-delete] -- mark that buffer to be deleted, and move down.
110 \\[Buffer-menu-delete-backwards] -- mark that buffer to be deleted, and move up.
111 \\[Buffer-menu-execute] -- delete or save marked buffers.
112 \\[Buffer-menu-unmark] -- remove all kinds of marks from current line.
113 With prefix argument, also move up one line.
114 \\[Buffer-menu-backup-unmark] -- back up a line and remove marks."
115 (kill-all-local-variables)
116 (use-local-map Buffer-menu-mode-map
)
117 (setq truncate-lines t
)
118 (setq buffer-read-only t
)
119 (setq major-mode
'Buffer-menu-mode
)
120 (setq mode-name
"Buffer Menu")
121 (run-hooks 'buffer-menu-mode-hook
))
123 (defvar Buffer-menu-buffer-column nil
)
125 (defvar Buffer-menu-size-column nil
)
127 (defun Buffer-menu-buffer (error-if-non-existent-p)
128 "Return buffer described by this line of buffer menu."
129 (if (null Buffer-menu-buffer-column
)
131 (goto-char (point-min))
132 (search-forward "Buffer")
134 (setq Buffer-menu-buffer-column
(current-column))
135 (search-forward "Size")
137 (setq Buffer-menu-size-column
(current-column))))
140 (forward-char Buffer-menu-buffer-column
)
141 (let ((start (point))
143 ;; End of buffer name marked by tab or two spaces.
144 (re-search-forward "\t\\| ")
145 (skip-chars-backward " \t")
146 (setq string
(buffer-substring start
(point)))
147 (or (get-buffer string
)
148 (if error-if-non-existent-p
149 (error "No buffer named \"%s\"" string
)
152 (defun buffer-menu (&optional arg
)
153 "Make a menu of buffers so you can save, delete or select them.
154 With argument, show only buffers that are visiting files.
155 Type ? after invocation to get help on commands available.
156 Type q immediately to make the buffer menu go away and to restore
157 previous window configuration."
159 (setq *buff-window-config
* (current-window-configuration))
161 (pop-to-buffer "*Buffer List*")
164 "Commands: d, s, x; 1, 2, m, u; delete; ~; q to quit; ? for help."))
166 (defun Buffer-menu-mark ()
167 "Mark buffer on this line for being displayed by \\<Buffer-menu-mode-map>\\[Buffer-menu-select] command."
170 (if (looking-at " [-M]")
172 (let ((buffer-read-only nil
))
177 (defun Buffer-menu-unmark (&optional backup
)
178 "Cancel all requested operations on buffer on this line and move down.
179 Optional ARG means move up."
182 (if (looking-at " [-M]")
184 (let* ((buf (Buffer-menu-buffer t
))
185 (mod (buffer-modified-p buf
))
186 (readonly (save-excursion (set-buffer buf
) buffer-read-only
))
187 (buffer-read-only nil
))
189 (insert (if readonly
(if mod
" *%" " %") (if mod
" * " " ")))))
190 (forward-line (if backup -
1 1)))
192 (defun Buffer-menu-backup-unmark ()
193 "Move up and cancel all requested operations on buffer on line above."
199 (defun Buffer-menu-delete ()
200 "Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command."
203 (if (looking-at " [-M]") ;header lines
205 (let ((buffer-read-only nil
))
210 (defun Buffer-menu-delete-backwards ()
211 "Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command
212 and then move up one line"
216 (if (looking-at " [-M]") (forward-line 1)))
218 (defun Buffer-menu-save ()
219 "Mark buffer on this line to be saved by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command."
223 (if (looking-at " [-M]") ;header lines
225 (let ((buffer-read-only nil
))
230 (defun Buffer-menu-not-modified ()
231 "Mark buffer on this line as unmodified (no changes to save)."
234 (set-buffer (Buffer-menu-buffer t
))
235 (set-buffer-modified-p nil
))
239 (if (looking-at "\\*")
240 (let ((buffer-read-only nil
))
244 (defun Buffer-menu-execute ()
245 "Save and/or delete buffers marked with \\<Buffer-menu-mode-map>\\[Buffer-menu-save] or \\<Buffer-menu-mode-map>\\[Buffer-menu-delete] commands."
248 (goto-char (point-min))
250 (while (re-search-forward "^.S" nil t
)
253 (set-buffer (Buffer-menu-buffer t
))
255 (setq modp
(buffer-modified-p)))
256 (let ((buffer-read-only nil
))
258 (insert (if modp ?
* ?
))))))
260 (goto-char (point-min))
262 (let ((buff-menu-buffer (current-buffer))
263 (buffer-read-only nil
))
264 (while (search-forward "\nD" nil t
)
266 (let ((buf (Buffer-menu-buffer nil
)))
268 (eq buf buff-menu-buffer
)
269 (save-excursion (kill-buffer buf
))))
270 (if (Buffer-menu-buffer nil
)
271 (progn (delete-char 1)
273 (delete-region (point) (progn (forward-line 1) (point)))
274 (forward-char -
1))))))
276 (defun Buffer-menu-select ()
277 "Select this line's buffer; also display buffers marked with `>'.
278 You can mark buffers with the \\<Buffer-menu-mode-map>\\[Buffer-menu-mark] command."
280 (let ((buff (Buffer-menu-buffer t
))
281 (menu (current-buffer))
284 (goto-char (point-min))
285 (while (search-forward "\n>" nil t
)
286 (setq tem
(Buffer-menu-buffer t
))
287 (let ((buffer-read-only nil
))
290 (or (eq tem buff
) (memq tem others
) (setq others
(cons tem others
))))
291 (setq others
(nreverse others
)
292 tem
(/ (1- (frame-height)) (1+ (length others
))))
293 (Buffer-menu-execute)
294 (delete-other-windows)
295 (switch-to-buffer buff
)
298 (if (equal (length others
) 0)
300 ;; Restore previous window configuration before displaying
302 (if *buff-window-config
*
304 (set-window-configuration *buff-window-config
*)
305 (setq *buff-window-config
* nil
)))
306 (switch-to-buffer buff
))
308 (split-window nil tem
)
310 (switch-to-buffer (car others
))
311 (setq others
(cdr others
)))
312 (other-window 1) ;back to the beginning!
316 (defun Buffer-menu-visit-tags-table ()
317 "Visit the tags table in the buffer on this line. See `visit-tags-table'."
319 (let ((file (buffer-file-name (Buffer-menu-buffer t
))))
321 (visit-tags-table file
)
322 (error "Specified buffer has no file"))))
324 (defun Buffer-menu-1-window ()
325 "Select this line's buffer, alone, in full frame."
327 (switch-to-buffer (Buffer-menu-buffer t
))
328 (bury-buffer (other-buffer))
329 (delete-other-windows))
331 (defun Buffer-menu-this-window ()
332 "Select this line's buffer in this window."
334 (switch-to-buffer (Buffer-menu-buffer t
)))
336 (defun Buffer-menu-other-window ()
337 "Select this line's buffer in other window, leaving buffer menu visible."
339 (switch-to-buffer-other-window (Buffer-menu-buffer t
)))
341 (defun Buffer-menu-switch-other-window ()
342 "Make the other window select this line's buffer.
343 The current window remains selected."
345 (display-buffer (Buffer-menu-buffer t
)))
347 (defun Buffer-menu-2-window ()
348 "Select this line's buffer, with previous buffer in second window."
350 (let ((buff (Buffer-menu-buffer t
))
351 (menu (current-buffer))
353 (delete-other-windows)
354 (switch-to-buffer (other-buffer))
358 ;;; buff-menu.el ends here