1 ;;; buff-menu.el --- buffer menu main function and support functions.
3 ;; Copyright (C) 1985, 1986, 1987, 1992 Free Software Foundation, Inc.
7 ;; This file is part of GNU Emacs.
9 ;; GNU Emacs is free software; you can redistribute it and/or modify
10 ;; it under the terms of the GNU General Public License as published by
11 ;; the Free Software Foundation; either version 2, or (at your option)
14 ;; GNU Emacs is distributed in the hope that it will be useful,
15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 ;; GNU General Public License for more details.
19 ;; You should have received a copy of the GNU General Public License
20 ;; along with GNU Emacs; see the file COPYING. If not, write to
21 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 ; Put buffer *Buffer List* into proper mode right away
26 ; so that from now on even list-buffers is enough to get a buffer menu.
28 (defvar Buffer-menu-mode-map nil
"")
30 (if Buffer-menu-mode-map
32 (setq Buffer-menu-mode-map
(make-keymap))
33 (suppress-keymap Buffer-menu-mode-map t
)
34 (define-key Buffer-menu-mode-map
"q" 'Buffer-menu-select
)
35 (define-key Buffer-menu-mode-map
"2" 'Buffer-menu-2-window
)
36 (define-key Buffer-menu-mode-map
"1" 'Buffer-menu-1-window
)
37 (define-key Buffer-menu-mode-map
"f" 'Buffer-menu-this-window
)
38 (define-key Buffer-menu-mode-map
"o" 'Buffer-menu-other-window
)
39 (define-key Buffer-menu-mode-map
"\C-o" 'Buffer-menu-switch-other-window
)
40 (define-key Buffer-menu-mode-map
"s" 'Buffer-menu-save
)
41 (define-key Buffer-menu-mode-map
"d" 'Buffer-menu-delete
)
42 (define-key Buffer-menu-mode-map
"k" 'Buffer-menu-delete
)
43 (define-key Buffer-menu-mode-map
"\C-d" 'Buffer-menu-delete-backwards
)
44 (define-key Buffer-menu-mode-map
"\C-k" 'Buffer-menu-delete
)
45 (define-key Buffer-menu-mode-map
"x" 'Buffer-menu-execute
)
46 (define-key Buffer-menu-mode-map
" " 'next-line
)
47 (define-key Buffer-menu-mode-map
"n" 'next-line
)
48 (define-key Buffer-menu-mode-map
"p" 'previous-line
)
49 (define-key Buffer-menu-mode-map
"\177" 'Buffer-menu-backup-unmark
)
50 (define-key Buffer-menu-mode-map
"~" 'Buffer-menu-not-modified
)
51 (define-key Buffer-menu-mode-map
"?" 'describe-mode
)
52 (define-key Buffer-menu-mode-map
"u" 'Buffer-menu-unmark
)
53 (define-key Buffer-menu-mode-map
"m" 'Buffer-menu-mark
)
54 (define-key Buffer-menu-mode-map
"t" 'Buffer-menu-visit-tags-table
))
56 ;; Buffer Menu mode is suitable only for specially formatted data.
57 (put 'Buffer-menu-mode
'mode-class
'special
)
59 (defun Buffer-menu-mode ()
60 "Major mode for editing a list of buffers.
61 Each line describes one of the buffers in Emacs.
62 Letters do not insert themselves; instead, they are commands.
63 \\<Buffer-menu-mode-map>
64 \\[Buffer-menu-mark] -- mark buffer to be displayed.
65 \\[Buffer-menu-select] -- select buffer of line point is on.
66 Also show buffers marked with m in other windows.
67 \\[Buffer-menu-1-window] -- select that buffer in full-frame window.
68 \\[Buffer-menu-2-window] -- select that buffer in one window,
69 together with buffer selected before this one in another window.
70 \\[Buffer-menu-this-window] -- select that buffer in place of the buffer menu buffer.
71 \\[Buffer-menu-other-window] -- select that buffer in another window,
72 so the buffer menu buffer remains visible in its window.
73 \\[Buffer-menu-switch-other-window] -- switch the other window to this buffer.
74 \\[Buffer-menu-visit-tags-table] -- visit-tags-table this buffer.
75 \\[Buffer-menu-not-modified] -- clear modified-flag on that buffer.
76 \\[Buffer-menu-save] -- mark that buffer to be saved, and move down.
77 \\[Buffer-menu-delete] -- mark that buffer to be deleted, and move down.
78 \\[Buffer-menu-delete-backwards] -- mark that buffer to be deleted, and move up.
79 \\[Buffer-menu-execute] -- delete or save marked buffers.
80 \\[Buffer-menu-unmark] -- remove all kinds of marks from current line.
81 \\[Buffer-menu-backup-unmark] -- back up a line and remove marks."
82 (kill-all-local-variables)
83 (use-local-map Buffer-menu-mode-map
)
84 (setq truncate-lines t
)
85 (setq buffer-read-only t
)
86 (setq major-mode
'Buffer-menu-mode
)
87 (setq mode-name
"Buffer Menu")
88 (run-hooks 'buffer-menu-mode-hook
))
90 (defvar Buffer-menu-buffer-column
4)
92 (defun Buffer-menu-buffer (error-if-non-existent-p)
93 "Return buffer described by this line of buffer menu."
96 (forward-char Buffer-menu-buffer-column
)
99 ;; End of buffer name marked by tab or two spaces.
100 (re-search-forward "\t\\| ")
101 (skip-chars-backward " \t")
102 (setq string
(buffer-substring start
(point)))
103 (or (get-buffer string
)
104 (if error-if-non-existent-p
105 (error "No buffer named \"%s\"" string
)
108 (defun buffer-menu (&optional arg
)
109 "Make a menu of buffers so you can save, delete or select them.
110 With argument, show only buffers that are visiting files.
111 Type ? after invocation to get help on commands available.
112 Type q immediately to make the buffer menu go away."
115 (pop-to-buffer "*Buffer List*")
118 "Commands: d, s, x; 1, 2, m, u, q; delete; ~; ? for help."))
120 (defun Buffer-menu-mark ()
121 "Mark buffer on this line for being displayed by \\<Buffer-menu-mode-map>\\[Buffer-menu-select] command."
124 (if (looking-at " [-M]")
126 (let ((buffer-read-only nil
))
131 (defun Buffer-menu-unmark ()
132 "Cancel all requested operations on buffer on this line."
135 (if (looking-at " [-M]")
137 (let* ((buf (Buffer-menu-buffer t
))
138 (mod (buffer-modified-p buf
))
139 (readonly (save-excursion (set-buffer buf
) buffer-read-only
))
140 (buffer-read-only nil
))
142 (insert (if readonly
(if mod
" *%" " %") (if mod
" * " " ")))))
145 (defun Buffer-menu-backup-unmark ()
146 "Move up and cancel all requested operations on buffer on line above."
152 (defun Buffer-menu-delete ()
153 "Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command."
156 (if (looking-at " [-M]") ;header lines
158 (let ((buffer-read-only nil
))
163 (defun Buffer-menu-delete-backwards ()
164 "Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command
165 and then move up one line"
169 (if (looking-at " [-M]") (forward-line 1)))
171 (defun Buffer-menu-save ()
172 "Mark buffer on this line to be saved by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command."
176 (if (looking-at " [-M]") ;header lines
178 (let ((buffer-read-only nil
))
183 (defun Buffer-menu-not-modified ()
184 "Mark buffer on this line as unmodified (no changes to save)."
187 (set-buffer (Buffer-menu-buffer t
))
188 (set-buffer-modified-p nil
))
192 (if (looking-at "\\*")
193 (let ((buffer-read-only nil
))
197 (defun Buffer-menu-execute ()
198 "Save and/or delete buffers marked with \\<Buffer-menu-mode-map>\\[Buffer-menu-save] or \\<Buffer-menu-mode-map>\\[Buffer-menu-delete] commands."
201 (goto-char (point-min))
203 (while (re-search-forward "^.S" nil t
)
206 (set-buffer (Buffer-menu-buffer t
))
208 (setq modp
(buffer-modified-p)))
209 (let ((buffer-read-only nil
))
211 (insert (if modp ?
* ?
))))))
213 (goto-char (point-min))
215 (let ((buff-menu-buffer (current-buffer))
216 (buffer-read-only nil
))
217 (while (search-forward "\nD" nil t
)
219 (let ((buf (Buffer-menu-buffer nil
)))
221 (eq buf buff-menu-buffer
)
222 (save-excursion (kill-buffer buf
))))
223 (if (Buffer-menu-buffer nil
)
224 (progn (delete-char 1)
226 (delete-region (point) (progn (forward-line 1) (point)))
227 (forward-char -
1))))))
229 (defun Buffer-menu-select ()
230 "Select this line's buffer; also display buffers marked with `>'.
231 You can mark buffers with the \\<Buffer-menu-mode-map>\\[Buffer-menu-mark] command."
233 (let ((buff (Buffer-menu-buffer t
))
234 (menu (current-buffer))
237 (goto-char (point-min))
238 (while (search-forward "\n>" nil t
)
239 (setq tem
(Buffer-menu-buffer t
))
240 (let ((buffer-read-only nil
))
243 (or (eq tem buff
) (memq tem others
) (setq others
(cons tem others
))))
244 (setq others
(nreverse others
)
245 tem
(/ (1- (frame-height)) (1+ (length others
))))
246 (delete-other-windows)
247 (switch-to-buffer buff
)
251 (split-window nil tem
)
253 (switch-to-buffer (car others
))
254 (setq others
(cdr others
)))
255 (other-window 1))) ;back to the beginning!
257 (defun Buffer-menu-visit-tags-table ()
258 "Visit the tags table in the buffer on this line. See `visit-tags-table'."
260 (let ((file (buffer-file-name (Buffer-menu-buffer t
))))
262 (visit-tags-table file
)
263 (error "Specified buffer has no file"))))
265 (defun Buffer-menu-1-window ()
266 "Select this line's buffer, alone, in full frame."
268 (switch-to-buffer (Buffer-menu-buffer t
))
269 (bury-buffer (other-buffer))
270 (delete-other-windows))
272 (defun Buffer-menu-this-window ()
273 "Select this line's buffer in this window."
275 (switch-to-buffer (Buffer-menu-buffer t
)))
277 (defun Buffer-menu-other-window ()
278 "Select this line's buffer in other window, leaving buffer menu visible."
280 (switch-to-buffer-other-window (Buffer-menu-buffer t
)))
282 (defun Buffer-menu-switch-other-window ()
283 "Make the other window select this line's buffer.
284 The current window remains selected."
286 (display-buffer (Buffer-menu-buffer t
)))
288 (defun Buffer-menu-2-window ()
289 "Select this line's buffer, with previous buffer in second window."
291 (let ((buff (Buffer-menu-buffer t
))
292 (menu (current-buffer))
294 (switch-to-buffer (other-buffer))
298 ;;; buff-menu.el ends here