1 ;;; ebuff-menu.el --- electric-buffer-list mode
3 ;; Copyright (C) 1985, 1986, 1994 Free Software Foundation, Inc.
5 ;; Author: Richard Mlynarik <mly@ai.mit.edu>
7 ;; Keywords: convenience
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 the
23 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
24 ;; Boston, MA 02110-1301, USA.
28 ;; Who says one can't have typeout windows in GNU Emacs? The entry
29 ;; point, `electric-buffer-list' works like ^r select buffer from the
30 ;; ITS Emacs lunar or tmacs libraries.
36 ;; this depends on the format of list-buffers (from src/buffer.c) and
37 ;; on stuff in lisp/buff-menu.el
39 (defvar electric-buffer-menu-mode-map nil
)
41 (defvar electric-buffer-menu-mode-hook nil
42 "Normal hook run by `electric-buffer-list'.")
45 (defun electric-buffer-list (arg)
46 "Pop up a buffer describing the set of Emacs buffers.
47 Vaguely like ITS lunar select buffer; combining typeoutoid buffer
48 listing with menuoid buffer selection.
50 If the very next character typed is a space then the buffer list
51 window disappears. Otherwise, one may move around in the buffer list
52 window, marking buffers to be selected, saved or deleted.
54 To exit and select a new buffer, type a space when the cursor is on
55 the appropriate line of the buffer-list window. Other commands are
56 much like those of `Buffer-menu-mode'.
58 Run hooks in `electric-buffer-menu-mode-hook' on entry.
60 \\{electric-buffer-menu-mode-map}"
63 (save-window-excursion
64 (setq buffer
(list-buffers-noselect arg
))
65 (Electric-pop-up-window buffer
)
69 (Electric-buffer-menu-mode)
70 (electric-buffer-update-highlight)
72 (catch 'electric-buffer-menu-select
73 (message "<<< Press Return to bury the buffer list >>>")
74 (if (eq (setq unread-command-events
(list (read-event)))
76 (progn (setq unread-command-events nil
)
77 (throw 'electric-buffer-menu-select nil
)))
78 (let ((start-point (point))
79 (first (progn (goto-char (point-min))
80 (unless Buffer-menu-use-header-line
83 (last (progn (goto-char (point-max))
87 ;; Use start-point if it is meaningful.
88 (goto-char (if (or (< start-point first
)
92 (Electric-command-loop 'electric-buffer-menu-select
95 'electric-buffer-menu-looper
96 (cons first last
))))))
102 (progn (set-buffer buffer
)
103 (let ((opoint (point-marker)))
104 (Buffer-menu-execute)
105 (goto-char (point-min))
106 (if (prog1 (search-forward "\n>" nil t
)
107 (goto-char opoint
) (set-marker opoint nil
))
109 (switch-to-buffer (Buffer-menu-buffer t
))))))))
111 (defun electric-buffer-menu-looper (state condition
)
112 (cond ((and condition
113 (not (memq (car condition
) '(buffer-read-only
115 beginning-of-buffer
))))
116 (signal (car condition
) (cdr condition
)))
117 ((< (point) (car state
))
118 (goto-char (point-min))
119 (unless Buffer-menu-use-header-line
121 ((> (point) (cdr state
))
122 (goto-char (point-max))
124 (if (pos-visible-in-window-p (point-max))
126 (electric-buffer-update-highlight))
128 (put 'Electric-buffer-menu-mode
'mode-class
'special
)
129 (defun Electric-buffer-menu-mode ()
130 "Major mode for editing a list of buffers.
131 Each line describes one of the buffers in Emacs.
132 Letters do not insert themselves; instead, they are commands.
133 \\<electric-buffer-menu-mode-map>
134 \\[keyboard-quit] or \\[Electric-buffer-menu-quit] -- exit buffer menu, returning to previous window and buffer
135 configuration. If the very first character typed is a space, it
136 also has this effect.
137 \\[Electric-buffer-menu-select] -- select buffer of line point is on.
138 Also show buffers marked with m in other windows,
139 deletes buffers marked with \"D\", and saves those marked with \"S\".
140 \\[Buffer-menu-mark] -- mark buffer to be displayed.
141 \\[Buffer-menu-not-modified] -- clear modified-flag on that buffer.
142 \\[Buffer-menu-save] -- mark that buffer to be saved.
143 \\[Buffer-menu-delete] or \\[Buffer-menu-delete-backwards] -- mark that buffer to be deleted.
144 \\[Buffer-menu-unmark] -- remove all kinds of marks from current line.
145 \\[Electric-buffer-menu-mode-view-buffer] -- view buffer, returning when done.
146 \\[Buffer-menu-backup-unmark] -- back up a line and remove marks.
148 \\{electric-buffer-menu-mode-map}
150 Entry to this mode via command `electric-buffer-list' calls the value of
151 `electric-buffer-menu-mode-hook'."
152 (let ((saved header-line-format
))
153 (kill-all-local-variables)
154 (setq header-line-format saved
))
155 (use-local-map electric-buffer-menu-mode-map
)
156 (setq mode-name
"Electric Buffer Menu")
157 (setq mode-line-buffer-identification
"Electric Buffer List")
158 (make-local-variable 'Helper-return-blurb
)
159 (setq Helper-return-blurb
"return to buffer editing")
160 (setq truncate-lines t
)
161 (setq buffer-read-only t
)
162 (setq major-mode
'Electric-buffer-menu-mode
)
163 (goto-char (point-min))
164 (if (search-forward "\n." nil t
) (forward-char -
1))
165 (run-mode-hooks 'electric-buffer-menu-mode-hook
))
167 ;; generally the same as Buffer-menu-mode-map
168 ;; (except we don't indirect to global-map)
169 (put 'Electric-buffer-menu-undefined
'suppress-keymap t
)
170 (if electric-buffer-menu-mode-map
172 (let ((map (make-keymap)))
173 (fillarray (car (cdr map
)) 'Electric-buffer-menu-undefined
)
174 (define-key map
"\e" nil
)
175 (define-key map
"\C-z" 'suspend-emacs
)
176 (define-key map
"v" 'Electric-buffer-menu-mode-view-buffer
)
177 (define-key map
(char-to-string help-char
) 'Helper-help
)
178 (define-key map
"?" 'Helper-describe-bindings
)
179 (define-key map
"\C-c" nil
)
180 (define-key map
"\C-c\C-c" 'Electric-buffer-menu-quit
)
181 (define-key map
"\C-]" 'Electric-buffer-menu-quit
)
182 (define-key map
"q" 'Electric-buffer-menu-quit
)
183 (define-key map
" " 'Electric-buffer-menu-select
)
184 (define-key map
"\C-m" 'Electric-buffer-menu-select
)
185 (define-key map
"\C-l" 'recenter
)
186 (define-key map
"s" 'Buffer-menu-save
)
187 (define-key map
"d" 'Buffer-menu-delete
)
188 (define-key map
"k" 'Buffer-menu-delete
)
189 (define-key map
"\C-d" 'Buffer-menu-delete-backwards
)
190 ;(define-key map "\C-k" 'Buffer-menu-delete)
191 (define-key map
"\177" 'Buffer-menu-backup-unmark
)
192 (define-key map
"~" 'Buffer-menu-not-modified
)
193 (define-key map
"u" 'Buffer-menu-unmark
)
196 (define-key map
(char-to-string i
) 'digit-argument
)
197 (define-key map
(concat "\e" (char-to-string i
)) 'digit-argument
)
199 (define-key map
"-" 'negative-argument
)
200 (define-key map
"\e-" 'negative-argument
)
201 (define-key map
"m" 'Buffer-menu-mark
)
202 (define-key map
"\C-u" 'universal-argument
)
203 (define-key map
"\C-p" 'previous-line
)
204 (define-key map
"\C-n" 'next-line
)
205 (define-key map
"p" 'previous-line
)
206 (define-key map
"n" 'next-line
)
207 (define-key map
"\C-v" 'scroll-up
)
208 (define-key map
"\ev" 'scroll-down
)
209 (define-key map
">" 'scroll-right
)
210 (define-key map
"<" 'scroll-left
)
211 (define-key map
"\e\C-v" 'scroll-other-window
)
212 (define-key map
"\e>" 'end-of-buffer
)
213 (define-key map
"\e<" 'beginning-of-buffer
)
214 (define-key map
"\e\e" nil
)
215 (define-key map
"\e\e\e" 'Electric-buffer-menu-quit
)
216 (define-key map
[escape escape escape
] 'Electric-buffer-menu-quit
)
217 (define-key map
[mouse-2
] 'Electric-buffer-menu-mouse-select
)
218 (setq electric-buffer-menu-mode-map map
)))
220 (defun Electric-buffer-menu-exit ()
222 (setq unread-command-events
(listify-key-sequence (this-command-keys)))
225 (throw 'electric-buffer-menu-select nil
)
226 (error (Buffer-menu-mode)
229 (defun Electric-buffer-menu-select ()
230 "Leave Electric Buffer Menu, selecting buffers and executing changes.
231 Save buffers marked \"S\". Delete buffers marked \"K\".
232 Select buffer at point and display buffers marked \">\" in other windows."
234 (throw 'electric-buffer-menu-select
(point)))
236 (defun Electric-buffer-menu-mouse-select (event)
238 (select-window (posn-window (event-end event
)))
239 (set-buffer (window-buffer (selected-window)))
240 (goto-char (posn-point (event-end event
)))
241 (throw 'electric-buffer-menu-select
(point)))
243 (defun Electric-buffer-menu-quit ()
244 "Leave Electric Buffer Menu, restoring previous window configuration.
245 Skip execution of select, save, and delete commands."
247 (throw 'electric-buffer-menu-select nil
))
249 (defun Electric-buffer-menu-undefined ()
253 (if (and (eq (key-binding "\C-c\C-c") 'Electric-buffer-menu-quit
)
254 (eq (key-binding " ") 'Electric-buffer-menu-select
)
255 (eq (key-binding (char-to-string help-char
)) 'Helper-help
)
256 (eq (key-binding "?") 'Helper-describe-bindings
))
257 (substitute-command-keys "Type C-c C-c to exit, Space to select, \\[Helper-help] for help, ? for commands")
258 (substitute-command-keys "\
259 Type \\[Electric-buffer-menu-quit] to exit, \
260 \\[Electric-buffer-menu-select] to select, \
261 \\[Helper-help] for help, \\[Helper-describe-bindings] for commands.")))
264 (defun Electric-buffer-menu-mode-view-buffer ()
265 "View buffer on current line in Electric Buffer Menu.
266 Return to Electric Buffer Menu when done."
268 (let ((bufnam (Buffer-menu-buffer nil
)))
272 (message "Buffer %s does not exist!" bufnam
)
275 (defvar electric-buffer-overlay nil
)
276 (defun electric-buffer-update-highlight ()
277 (when (eq major-mode
'Electric-buffer-menu-mode
)
278 ;; Make sure we have an overlay to use.
279 (or electric-buffer-overlay
281 (make-local-variable 'electric-buffer-overlay
)
282 (setq electric-buffer-overlay
(make-overlay (point) (point)))))
283 (move-overlay electric-buffer-overlay
284 (save-excursion (beginning-of-line) (point))
285 (save-excursion (end-of-line) (point)))
286 (overlay-put electric-buffer-overlay
'face
'highlight
)))
288 (provide 'ebuff-menu
)
290 ;;; arch-tag: 1d4509b3-eece-4d4f-95ea-77c83eaf0275
291 ;;; ebuff-menu.el ends here