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c0274f38 ER |
1 | ;;; ebuff-menu.el --- electric-buffer-list mode |
2 | ||
e91081eb | 3 | ;; Copyright (C) 1985, 1986, 1994, 2001, 2002, 2003, 2004, |
409cc4a3 | 4 | ;; 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
2076c87c | 5 | |
3a801d0c | 6 | ;; Author: Richard Mlynarik <mly@ai.mit.edu> |
54138c9d | 7 | ;; Maintainer: FSF |
3465cfd7 | 8 | ;; Keywords: convenience |
3a801d0c | 9 | |
2076c87c JB |
10 | ;; This file is part of GNU Emacs. |
11 | ||
eb3fa2cf | 12 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
2076c87c | 13 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
14 | ;; the Free Software Foundation, either version 3 of the License, or |
15 | ;; (at your option) any later version. | |
2076c87c JB |
16 | |
17 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;; GNU General Public License for more details. | |
21 | ||
22 | ;; You should have received a copy of the GNU General Public License | |
eb3fa2cf | 23 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
2076c87c | 24 | |
e5167999 ER |
25 | ;;; Commentary: |
26 | ||
e41b2db1 ER |
27 | ;; Who says one can't have typeout windows in GNU Emacs? The entry |
28 | ;; point, `electric-buffer-list' works like ^r select buffer from the | |
29 | ;; ITS Emacs lunar or tmacs libraries. | |
e5167999 ER |
30 | |
31 | ;;; Code: | |
2076c87c JB |
32 | |
33 | (require 'electric) | |
34 | ||
35 | ;; this depends on the format of list-buffers (from src/buffer.c) and | |
36 | ;; on stuff in lisp/buff-menu.el | |
37 | ||
38 | (defvar electric-buffer-menu-mode-map nil) | |
39 | ||
5f20b653 TTN |
40 | (defvar electric-buffer-menu-mode-hook nil |
41 | "Normal hook run by `electric-buffer-list'.") | |
42 | ||
2076c87c JB |
43 | ;;;###autoload |
44 | (defun electric-buffer-list (arg) | |
5f20b653 | 45 | "Pop up a buffer describing the set of Emacs buffers. |
2076c87c JB |
46 | Vaguely like ITS lunar select buffer; combining typeoutoid buffer |
47 | listing with menuoid buffer selection. | |
48 | ||
49 | If the very next character typed is a space then the buffer list | |
50 | window disappears. Otherwise, one may move around in the buffer list | |
51 | window, marking buffers to be selected, saved or deleted. | |
52 | ||
53 | To exit and select a new buffer, type a space when the cursor is on | |
54 | the appropriate line of the buffer-list window. Other commands are | |
5f20b653 | 55 | much like those of `Buffer-menu-mode'. |
2076c87c | 56 | |
5f20b653 | 57 | Run hooks in `electric-buffer-menu-mode-hook' on entry. |
2076c87c | 58 | |
71296446 | 59 | \\{electric-buffer-menu-mode-map}" |
2076c87c JB |
60 | (interactive "P") |
61 | (let (select buffer) | |
62 | (save-window-excursion | |
cf6ce50b SM |
63 | (setq buffer (list-buffers-noselect arg)) |
64 | (Electric-pop-up-window buffer) | |
2076c87c JB |
65 | (unwind-protect |
66 | (progn | |
67 | (set-buffer buffer) | |
68 | (Electric-buffer-menu-mode) | |
ede8f2fe | 69 | (electric-buffer-update-highlight) |
2076c87c JB |
70 | (setq select |
71 | (catch 'electric-buffer-menu-select | |
fc7323e6 | 72 | (message "<<< Press Return to bury the buffer list >>>") |
d42cc509 | 73 | (if (eq (setq unread-command-events (list (read-event))) |
a8158099 | 74 | ?\s) |
dbc4e1c1 | 75 | (progn (setq unread-command-events nil) |
2076c87c | 76 | (throw 'electric-buffer-menu-select nil))) |
69adebeb KH |
77 | (let ((start-point (point)) |
78 | (first (progn (goto-char (point-min)) | |
a82c1267 JPW |
79 | (unless Buffer-menu-use-header-line |
80 | (forward-line 2)) | |
2076c87c JB |
81 | (point))) |
82 | (last (progn (goto-char (point-max)) | |
83 | (forward-line -1) | |
84 | (point))) | |
85 | (goal-column 0)) | |
69adebeb KH |
86 | ;; Use start-point if it is meaningful. |
87 | (goto-char (if (or (< start-point first) | |
88 | (> start-point last)) | |
89 | first | |
90 | start-point)) | |
2076c87c JB |
91 | (Electric-command-loop 'electric-buffer-menu-select |
92 | nil | |
93 | t | |
94 | 'electric-buffer-menu-looper | |
95 | (cons first last)))))) | |
96 | (set-buffer buffer) | |
97 | (Buffer-menu-mode) | |
98 | (bury-buffer buffer) | |
99 | (message ""))) | |
100 | (if select | |
101 | (progn (set-buffer buffer) | |
102 | (let ((opoint (point-marker))) | |
103 | (Buffer-menu-execute) | |
104 | (goto-char (point-min)) | |
105 | (if (prog1 (search-forward "\n>" nil t) | |
106 | (goto-char opoint) (set-marker opoint nil)) | |
107 | (Buffer-menu-select) | |
108 | (switch-to-buffer (Buffer-menu-buffer t)))))))) | |
109 | ||
110 | (defun electric-buffer-menu-looper (state condition) | |
111 | (cond ((and condition | |
112 | (not (memq (car condition) '(buffer-read-only | |
113 | end-of-buffer | |
114 | beginning-of-buffer)))) | |
115 | (signal (car condition) (cdr condition))) | |
116 | ((< (point) (car state)) | |
117 | (goto-char (point-min)) | |
a82c1267 JPW |
118 | (unless Buffer-menu-use-header-line |
119 | (forward-line 2))) | |
2076c87c JB |
120 | ((> (point) (cdr state)) |
121 | (goto-char (point-max)) | |
122 | (forward-line -1) | |
123 | (if (pos-visible-in-window-p (point-max)) | |
ede8f2fe RS |
124 | (recenter -1)))) |
125 | (electric-buffer-update-highlight)) | |
2076c87c | 126 | |
784f8619 RS |
127 | (defvar Helper-return-blurb) |
128 | ||
2076c87c JB |
129 | (put 'Electric-buffer-menu-mode 'mode-class 'special) |
130 | (defun Electric-buffer-menu-mode () | |
131 | "Major mode for editing a list of buffers. | |
132 | Each line describes one of the buffers in Emacs. | |
133 | Letters do not insert themselves; instead, they are commands. | |
134 | \\<electric-buffer-menu-mode-map> | |
135 | \\[keyboard-quit] or \\[Electric-buffer-menu-quit] -- exit buffer menu, returning to previous window and buffer | |
136 | configuration. If the very first character typed is a space, it | |
137 | also has this effect. | |
138 | \\[Electric-buffer-menu-select] -- select buffer of line point is on. | |
139 | Also show buffers marked with m in other windows, | |
140 | deletes buffers marked with \"D\", and saves those marked with \"S\". | |
141 | \\[Buffer-menu-mark] -- mark buffer to be displayed. | |
142 | \\[Buffer-menu-not-modified] -- clear modified-flag on that buffer. | |
143 | \\[Buffer-menu-save] -- mark that buffer to be saved. | |
144 | \\[Buffer-menu-delete] or \\[Buffer-menu-delete-backwards] -- mark that buffer to be deleted. | |
145 | \\[Buffer-menu-unmark] -- remove all kinds of marks from current line. | |
146 | \\[Electric-buffer-menu-mode-view-buffer] -- view buffer, returning when done. | |
147 | \\[Buffer-menu-backup-unmark] -- back up a line and remove marks. | |
148 | ||
149 | \\{electric-buffer-menu-mode-map} | |
150 | ||
5f20b653 TTN |
151 | Entry to this mode via command `electric-buffer-list' calls the value of |
152 | `electric-buffer-menu-mode-hook'." | |
e4edc5cd TTN |
153 | (let ((saved header-line-format)) |
154 | (kill-all-local-variables) | |
155 | (setq header-line-format saved)) | |
2076c87c JB |
156 | (use-local-map electric-buffer-menu-mode-map) |
157 | (setq mode-name "Electric Buffer Menu") | |
158 | (setq mode-line-buffer-identification "Electric Buffer List") | |
159 | (make-local-variable 'Helper-return-blurb) | |
160 | (setq Helper-return-blurb "return to buffer editing") | |
161 | (setq truncate-lines t) | |
162 | (setq buffer-read-only t) | |
163 | (setq major-mode 'Electric-buffer-menu-mode) | |
164 | (goto-char (point-min)) | |
165 | (if (search-forward "\n." nil t) (forward-char -1)) | |
a3d9e1fa | 166 | (run-mode-hooks 'electric-buffer-menu-mode-hook)) |
2076c87c JB |
167 | |
168 | ;; generally the same as Buffer-menu-mode-map | |
169 | ;; (except we don't indirect to global-map) | |
170 | (put 'Electric-buffer-menu-undefined 'suppress-keymap t) | |
171 | (if electric-buffer-menu-mode-map | |
172 | nil | |
9be969d7 | 173 | (let ((map (make-keymap))) |
f536481d | 174 | (fillarray (car (cdr map)) 'Electric-buffer-menu-undefined) |
9be969d7 | 175 | (define-key map "\e" nil) |
f35ca2fe | 176 | (define-key map "\C-z" 'suspend-frame) |
2076c87c | 177 | (define-key map "v" 'Electric-buffer-menu-mode-view-buffer) |
8892e83c | 178 | (define-key map (char-to-string help-char) 'Helper-help) |
2076c87c JB |
179 | (define-key map "?" 'Helper-describe-bindings) |
180 | (define-key map "\C-c" nil) | |
181 | (define-key map "\C-c\C-c" 'Electric-buffer-menu-quit) | |
182 | (define-key map "\C-]" 'Electric-buffer-menu-quit) | |
183 | (define-key map "q" 'Electric-buffer-menu-quit) | |
184 | (define-key map " " 'Electric-buffer-menu-select) | |
fc7323e6 | 185 | (define-key map "\C-m" 'Electric-buffer-menu-select) |
2076c87c JB |
186 | (define-key map "\C-l" 'recenter) |
187 | (define-key map "s" 'Buffer-menu-save) | |
188 | (define-key map "d" 'Buffer-menu-delete) | |
189 | (define-key map "k" 'Buffer-menu-delete) | |
190 | (define-key map "\C-d" 'Buffer-menu-delete-backwards) | |
191 | ;(define-key map "\C-k" 'Buffer-menu-delete) | |
192 | (define-key map "\177" 'Buffer-menu-backup-unmark) | |
193 | (define-key map "~" 'Buffer-menu-not-modified) | |
194 | (define-key map "u" 'Buffer-menu-unmark) | |
195 | (let ((i ?0)) | |
196 | (while (<= i ?9) | |
197 | (define-key map (char-to-string i) 'digit-argument) | |
198 | (define-key map (concat "\e" (char-to-string i)) 'digit-argument) | |
199 | (setq i (1+ i)))) | |
200 | (define-key map "-" 'negative-argument) | |
201 | (define-key map "\e-" 'negative-argument) | |
202 | (define-key map "m" 'Buffer-menu-mark) | |
203 | (define-key map "\C-u" 'universal-argument) | |
204 | (define-key map "\C-p" 'previous-line) | |
205 | (define-key map "\C-n" 'next-line) | |
206 | (define-key map "p" 'previous-line) | |
207 | (define-key map "n" 'next-line) | |
208 | (define-key map "\C-v" 'scroll-up) | |
209 | (define-key map "\ev" 'scroll-down) | |
210 | (define-key map ">" 'scroll-right) | |
211 | (define-key map "<" 'scroll-left) | |
212 | (define-key map "\e\C-v" 'scroll-other-window) | |
213 | (define-key map "\e>" 'end-of-buffer) | |
214 | (define-key map "\e<" 'beginning-of-buffer) | |
43145fb4 | 215 | (define-key map "\e\e" nil) |
ef946998 RS |
216 | (define-key map "\e\e\e" 'Electric-buffer-menu-quit) |
217 | (define-key map [escape escape escape] 'Electric-buffer-menu-quit) | |
3c59c255 | 218 | (define-key map [mouse-2] 'Electric-buffer-menu-mouse-select) |
2076c87c | 219 | (setq electric-buffer-menu-mode-map map))) |
71296446 | 220 | |
2076c87c JB |
221 | (defun Electric-buffer-menu-exit () |
222 | (interactive) | |
d42cc509 | 223 | (setq unread-command-events (listify-key-sequence (this-command-keys))) |
2076c87c JB |
224 | ;; for robustness |
225 | (condition-case () | |
226 | (throw 'electric-buffer-menu-select nil) | |
227 | (error (Buffer-menu-mode) | |
228 | (other-buffer)))) | |
229 | ||
230 | (defun Electric-buffer-menu-select () | |
231 | "Leave Electric Buffer Menu, selecting buffers and executing changes. | |
5f20b653 TTN |
232 | Save buffers marked \"S\". Delete buffers marked \"K\". |
233 | Select buffer at point and display buffers marked \">\" in other windows." | |
2076c87c JB |
234 | (interactive) |
235 | (throw 'electric-buffer-menu-select (point))) | |
236 | ||
3c59c255 KH |
237 | (defun Electric-buffer-menu-mouse-select (event) |
238 | (interactive "e") | |
239 | (select-window (posn-window (event-end event))) | |
240 | (set-buffer (window-buffer (selected-window))) | |
241 | (goto-char (posn-point (event-end event))) | |
242 | (throw 'electric-buffer-menu-select (point))) | |
243 | ||
2076c87c JB |
244 | (defun Electric-buffer-menu-quit () |
245 | "Leave Electric Buffer Menu, restoring previous window configuration. | |
5f20b653 | 246 | Skip execution of select, save, and delete commands." |
2076c87c JB |
247 | (interactive) |
248 | (throw 'electric-buffer-menu-select nil)) | |
249 | ||
250 | (defun Electric-buffer-menu-undefined () | |
251 | (interactive) | |
252 | (ding) | |
2bb7c30c KH |
253 | (message "%s" |
254 | (if (and (eq (key-binding "\C-c\C-c") 'Electric-buffer-menu-quit) | |
2076c87c | 255 | (eq (key-binding " ") 'Electric-buffer-menu-select) |
e17d2fd1 | 256 | (eq (key-binding (char-to-string help-char)) 'Helper-help) |
2076c87c | 257 | (eq (key-binding "?") 'Helper-describe-bindings)) |
573cd924 | 258 | (substitute-command-keys "Type C-c C-c to exit, Space to select, \\[Helper-help] for help, ? for commands") |
2076c87c JB |
259 | (substitute-command-keys "\ |
260 | Type \\[Electric-buffer-menu-quit] to exit, \ | |
261 | \\[Electric-buffer-menu-select] to select, \ | |
262 | \\[Helper-help] for help, \\[Helper-describe-bindings] for commands."))) | |
263 | (sit-for 4)) | |
264 | ||
265 | (defun Electric-buffer-menu-mode-view-buffer () | |
266 | "View buffer on current line in Electric Buffer Menu. | |
5f20b653 | 267 | Return to Electric Buffer Menu when done." |
2076c87c JB |
268 | (interactive) |
269 | (let ((bufnam (Buffer-menu-buffer nil))) | |
270 | (if bufnam | |
271 | (view-buffer bufnam) | |
272 | (ding) | |
273 | (message "Buffer %s does not exist!" bufnam) | |
274 | (sit-for 4)))) | |
275 | ||
ede8f2fe RS |
276 | (defvar electric-buffer-overlay nil) |
277 | (defun electric-buffer-update-highlight () | |
080314d3 JPW |
278 | (when (eq major-mode 'Electric-buffer-menu-mode) |
279 | ;; Make sure we have an overlay to use. | |
280 | (or electric-buffer-overlay | |
281 | (progn | |
282 | (make-local-variable 'electric-buffer-overlay) | |
283 | (setq electric-buffer-overlay (make-overlay (point) (point))))) | |
284 | (move-overlay electric-buffer-overlay | |
285 | (save-excursion (beginning-of-line) (point)) | |
286 | (save-excursion (end-of-line) (point))) | |
287 | (overlay-put electric-buffer-overlay 'face 'highlight))) | |
ede8f2fe | 288 | |
896546cd RS |
289 | (provide 'ebuff-menu) |
290 | ||
cbee283d | 291 | ;; arch-tag: 1d4509b3-eece-4d4f-95ea-77c83eaf0275 |
c0274f38 | 292 | ;;; ebuff-menu.el ends here |