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c0274f38 ER |
1 | ;;; ebuff-menu.el --- electric-buffer-list mode |
2 | ||
8f1204db | 3 | ;; Copyright (C) 1985, 1986, 1994 Free Software Foundation, Inc. |
2076c87c | 4 | |
3a801d0c | 5 | ;; Author: Richard Mlynarik <mly@ai.mit.edu> |
54138c9d | 6 | ;; Maintainer: FSF |
3465cfd7 | 7 | ;; Keywords: convenience |
3a801d0c | 8 | |
2076c87c JB |
9 | ;; This file is part of GNU Emacs. |
10 | ||
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 | |
e5167999 | 13 | ;; the Free Software Foundation; either version 2, or (at your option) |
2076c87c JB |
14 | ;; any later version. |
15 | ||
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. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
b578f267 EN |
22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
23 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
24 | ;; Boston, MA 02111-1307, USA. | |
2076c87c | 25 | |
e5167999 ER |
26 | ;;; Commentary: |
27 | ||
e41b2db1 ER |
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. | |
e5167999 ER |
31 | |
32 | ;;; Code: | |
2076c87c JB |
33 | |
34 | (require 'electric) | |
35 | ||
36 | ;; this depends on the format of list-buffers (from src/buffer.c) and | |
37 | ;; on stuff in lisp/buff-menu.el | |
38 | ||
39 | (defvar electric-buffer-menu-mode-map nil) | |
40 | ||
41 | ;;;###autoload | |
42 | (defun electric-buffer-list (arg) | |
43 | "Pops up a buffer describing the set of Emacs buffers. | |
44 | Vaguely like ITS lunar select buffer; combining typeoutoid buffer | |
45 | listing with menuoid buffer selection. | |
46 | ||
47 | If the very next character typed is a space then the buffer list | |
48 | window disappears. Otherwise, one may move around in the buffer list | |
49 | window, marking buffers to be selected, saved or deleted. | |
50 | ||
51 | To exit and select a new buffer, type a space when the cursor is on | |
52 | the appropriate line of the buffer-list window. Other commands are | |
53 | much like those of buffer-menu-mode. | |
54 | ||
55 | Calls value of `electric-buffer-menu-mode-hook' on entry if non-nil. | |
56 | ||
57 | \\{electric-buffer-menu-mode-map}" | |
58 | (interactive "P") | |
59 | (let (select buffer) | |
60 | (save-window-excursion | |
61 | (save-window-excursion (list-buffers arg)) | |
62 | (setq buffer (window-buffer (Electric-pop-up-window "*Buffer List*"))) | |
63 | (unwind-protect | |
64 | (progn | |
65 | (set-buffer buffer) | |
66 | (Electric-buffer-menu-mode) | |
67 | (setq select | |
68 | (catch 'electric-buffer-menu-select | |
fc7323e6 | 69 | (message "<<< Press Return to bury the buffer list >>>") |
d42cc509 RS |
70 | (if (eq (setq unread-command-events (list (read-event))) |
71 | ?\ ) | |
dbc4e1c1 | 72 | (progn (setq unread-command-events nil) |
2076c87c | 73 | (throw 'electric-buffer-menu-select nil))) |
69adebeb KH |
74 | (let ((start-point (point)) |
75 | (first (progn (goto-char (point-min)) | |
2076c87c JB |
76 | (forward-line 2) |
77 | (point))) | |
78 | (last (progn (goto-char (point-max)) | |
79 | (forward-line -1) | |
80 | (point))) | |
81 | (goal-column 0)) | |
69adebeb KH |
82 | ;; Use start-point if it is meaningful. |
83 | (goto-char (if (or (< start-point first) | |
84 | (> start-point last)) | |
85 | first | |
86 | start-point)) | |
2076c87c JB |
87 | (Electric-command-loop 'electric-buffer-menu-select |
88 | nil | |
89 | t | |
90 | 'electric-buffer-menu-looper | |
91 | (cons first last)))))) | |
92 | (set-buffer buffer) | |
93 | (Buffer-menu-mode) | |
94 | (bury-buffer buffer) | |
95 | (message ""))) | |
96 | (if select | |
97 | (progn (set-buffer buffer) | |
98 | (let ((opoint (point-marker))) | |
99 | (Buffer-menu-execute) | |
100 | (goto-char (point-min)) | |
101 | (if (prog1 (search-forward "\n>" nil t) | |
102 | (goto-char opoint) (set-marker opoint nil)) | |
103 | (Buffer-menu-select) | |
104 | (switch-to-buffer (Buffer-menu-buffer t)))))))) | |
105 | ||
106 | (defun electric-buffer-menu-looper (state condition) | |
107 | (cond ((and condition | |
108 | (not (memq (car condition) '(buffer-read-only | |
109 | end-of-buffer | |
110 | beginning-of-buffer)))) | |
111 | (signal (car condition) (cdr condition))) | |
112 | ((< (point) (car state)) | |
113 | (goto-char (point-min)) | |
114 | (forward-line 2)) | |
115 | ((> (point) (cdr state)) | |
116 | (goto-char (point-max)) | |
117 | (forward-line -1) | |
118 | (if (pos-visible-in-window-p (point-max)) | |
119 | (recenter -1))))) | |
120 | ||
121 | (put 'Electric-buffer-menu-mode 'mode-class 'special) | |
122 | (defun Electric-buffer-menu-mode () | |
123 | "Major mode for editing a list of buffers. | |
124 | Each line describes one of the buffers in Emacs. | |
125 | Letters do not insert themselves; instead, they are commands. | |
126 | \\<electric-buffer-menu-mode-map> | |
127 | \\[keyboard-quit] or \\[Electric-buffer-menu-quit] -- exit buffer menu, returning to previous window and buffer | |
128 | configuration. If the very first character typed is a space, it | |
129 | also has this effect. | |
130 | \\[Electric-buffer-menu-select] -- select buffer of line point is on. | |
131 | Also show buffers marked with m in other windows, | |
132 | deletes buffers marked with \"D\", and saves those marked with \"S\". | |
133 | \\[Buffer-menu-mark] -- mark buffer to be displayed. | |
134 | \\[Buffer-menu-not-modified] -- clear modified-flag on that buffer. | |
135 | \\[Buffer-menu-save] -- mark that buffer to be saved. | |
136 | \\[Buffer-menu-delete] or \\[Buffer-menu-delete-backwards] -- mark that buffer to be deleted. | |
137 | \\[Buffer-menu-unmark] -- remove all kinds of marks from current line. | |
138 | \\[Electric-buffer-menu-mode-view-buffer] -- view buffer, returning when done. | |
139 | \\[Buffer-menu-backup-unmark] -- back up a line and remove marks. | |
140 | ||
141 | \\{electric-buffer-menu-mode-map} | |
142 | ||
143 | Entry to this mode via command electric-buffer-list calls the value of | |
144 | electric-buffer-menu-mode-hook if it is non-nil." | |
145 | (kill-all-local-variables) | |
146 | (use-local-map electric-buffer-menu-mode-map) | |
147 | (setq mode-name "Electric Buffer Menu") | |
148 | (setq mode-line-buffer-identification "Electric Buffer List") | |
149 | (make-local-variable 'Helper-return-blurb) | |
150 | (setq Helper-return-blurb "return to buffer editing") | |
151 | (setq truncate-lines t) | |
152 | (setq buffer-read-only t) | |
153 | (setq major-mode 'Electric-buffer-menu-mode) | |
154 | (goto-char (point-min)) | |
155 | (if (search-forward "\n." nil t) (forward-char -1)) | |
156 | (run-hooks 'electric-buffer-menu-mode-hook)) | |
157 | ||
158 | ;; generally the same as Buffer-menu-mode-map | |
159 | ;; (except we don't indirect to global-map) | |
160 | (put 'Electric-buffer-menu-undefined 'suppress-keymap t) | |
161 | (if electric-buffer-menu-mode-map | |
162 | nil | |
9be969d7 | 163 | (let ((map (make-keymap))) |
f536481d | 164 | (fillarray (car (cdr map)) 'Electric-buffer-menu-undefined) |
9be969d7 | 165 | (define-key map "\e" nil) |
2076c87c JB |
166 | (define-key map "\C-z" 'suspend-emacs) |
167 | (define-key map "v" 'Electric-buffer-menu-mode-view-buffer) | |
8892e83c | 168 | (define-key map (char-to-string help-char) 'Helper-help) |
2076c87c JB |
169 | (define-key map "?" 'Helper-describe-bindings) |
170 | (define-key map "\C-c" nil) | |
171 | (define-key map "\C-c\C-c" 'Electric-buffer-menu-quit) | |
172 | (define-key map "\C-]" 'Electric-buffer-menu-quit) | |
173 | (define-key map "q" 'Electric-buffer-menu-quit) | |
174 | (define-key map " " 'Electric-buffer-menu-select) | |
fc7323e6 | 175 | (define-key map "\C-m" 'Electric-buffer-menu-select) |
2076c87c JB |
176 | (define-key map "\C-l" 'recenter) |
177 | (define-key map "s" 'Buffer-menu-save) | |
178 | (define-key map "d" 'Buffer-menu-delete) | |
179 | (define-key map "k" 'Buffer-menu-delete) | |
180 | (define-key map "\C-d" 'Buffer-menu-delete-backwards) | |
181 | ;(define-key map "\C-k" 'Buffer-menu-delete) | |
182 | (define-key map "\177" 'Buffer-menu-backup-unmark) | |
183 | (define-key map "~" 'Buffer-menu-not-modified) | |
184 | (define-key map "u" 'Buffer-menu-unmark) | |
185 | (let ((i ?0)) | |
186 | (while (<= i ?9) | |
187 | (define-key map (char-to-string i) 'digit-argument) | |
188 | (define-key map (concat "\e" (char-to-string i)) 'digit-argument) | |
189 | (setq i (1+ i)))) | |
190 | (define-key map "-" 'negative-argument) | |
191 | (define-key map "\e-" 'negative-argument) | |
192 | (define-key map "m" 'Buffer-menu-mark) | |
193 | (define-key map "\C-u" 'universal-argument) | |
194 | (define-key map "\C-p" 'previous-line) | |
195 | (define-key map "\C-n" 'next-line) | |
196 | (define-key map "p" 'previous-line) | |
197 | (define-key map "n" 'next-line) | |
198 | (define-key map "\C-v" 'scroll-up) | |
199 | (define-key map "\ev" 'scroll-down) | |
200 | (define-key map ">" 'scroll-right) | |
201 | (define-key map "<" 'scroll-left) | |
202 | (define-key map "\e\C-v" 'scroll-other-window) | |
203 | (define-key map "\e>" 'end-of-buffer) | |
204 | (define-key map "\e<" 'beginning-of-buffer) | |
43145fb4 | 205 | (define-key map "\e\e" nil) |
ef946998 RS |
206 | (define-key map "\e\e\e" 'Electric-buffer-menu-quit) |
207 | (define-key map [escape escape escape] 'Electric-buffer-menu-quit) | |
3c59c255 | 208 | (define-key map [mouse-2] 'Electric-buffer-menu-mouse-select) |
2076c87c JB |
209 | (setq electric-buffer-menu-mode-map map))) |
210 | ||
211 | (defun Electric-buffer-menu-exit () | |
212 | (interactive) | |
d42cc509 | 213 | (setq unread-command-events (listify-key-sequence (this-command-keys))) |
2076c87c JB |
214 | ;; for robustness |
215 | (condition-case () | |
216 | (throw 'electric-buffer-menu-select nil) | |
217 | (error (Buffer-menu-mode) | |
218 | (other-buffer)))) | |
219 | ||
220 | (defun Electric-buffer-menu-select () | |
221 | "Leave Electric Buffer Menu, selecting buffers and executing changes. | |
222 | Saves buffers marked \"S\". Deletes buffers marked \"K\". | |
223 | Selects buffer at point and displays buffers marked \">\" in other windows." | |
224 | (interactive) | |
225 | (throw 'electric-buffer-menu-select (point))) | |
226 | ||
3c59c255 KH |
227 | (defun Electric-buffer-menu-mouse-select (event) |
228 | (interactive "e") | |
229 | (select-window (posn-window (event-end event))) | |
230 | (set-buffer (window-buffer (selected-window))) | |
231 | (goto-char (posn-point (event-end event))) | |
232 | (throw 'electric-buffer-menu-select (point))) | |
233 | ||
2076c87c JB |
234 | (defun Electric-buffer-menu-quit () |
235 | "Leave Electric Buffer Menu, restoring previous window configuration. | |
236 | Does not execute select, save, or delete commands." | |
237 | (interactive) | |
238 | (throw 'electric-buffer-menu-select nil)) | |
239 | ||
240 | (defun Electric-buffer-menu-undefined () | |
241 | (interactive) | |
242 | (ding) | |
2bb7c30c KH |
243 | (message "%s" |
244 | (if (and (eq (key-binding "\C-c\C-c") 'Electric-buffer-menu-quit) | |
2076c87c | 245 | (eq (key-binding " ") 'Electric-buffer-menu-select) |
e17d2fd1 | 246 | (eq (key-binding (char-to-string help-char)) 'Helper-help) |
2076c87c | 247 | (eq (key-binding "?") 'Helper-describe-bindings)) |
573cd924 | 248 | (substitute-command-keys "Type C-c C-c to exit, Space to select, \\[Helper-help] for help, ? for commands") |
2076c87c JB |
249 | (substitute-command-keys "\ |
250 | Type \\[Electric-buffer-menu-quit] to exit, \ | |
251 | \\[Electric-buffer-menu-select] to select, \ | |
252 | \\[Helper-help] for help, \\[Helper-describe-bindings] for commands."))) | |
253 | (sit-for 4)) | |
254 | ||
255 | (defun Electric-buffer-menu-mode-view-buffer () | |
256 | "View buffer on current line in Electric Buffer Menu. | |
257 | Returns to Electric Buffer Menu when done." | |
258 | (interactive) | |
259 | (let ((bufnam (Buffer-menu-buffer nil))) | |
260 | (if bufnam | |
261 | (view-buffer bufnam) | |
262 | (ding) | |
263 | (message "Buffer %s does not exist!" bufnam) | |
264 | (sit-for 4)))) | |
265 | ||
896546cd RS |
266 | (provide 'ebuff-menu) |
267 | ||
c0274f38 | 268 | ;;; ebuff-menu.el ends here |