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1 | ;; Buffer menu main function and support functions. |
2 | ;; Copyright (C) 1985, 1986, 1987 Free Software Foundation, Inc. | |
3 | ||
4 | ;; This file is part of GNU Emacs. | |
5 | ||
6 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
7 | ;; it under the terms of the GNU General Public License as published by | |
8 | ;; the Free Software Foundation; either version 1, or (at your option) | |
9 | ;; any later version. | |
10 | ||
11 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
12 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | ;; GNU General Public License for more details. | |
15 | ||
16 | ;; You should have received a copy of the GNU General Public License | |
17 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
18 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | ||
20 | ||
21 | ; Put buffer *Buffer List* into proper mode right away | |
22 | ; so that from now on even list-buffers is enough to get a buffer menu. | |
23 | ||
24 | (defvar Buffer-menu-mode-map nil "") | |
25 | ||
26 | (if Buffer-menu-mode-map | |
27 | () | |
28 | (setq Buffer-menu-mode-map (make-keymap)) | |
29 | (suppress-keymap Buffer-menu-mode-map t) | |
30 | (define-key Buffer-menu-mode-map "q" 'Buffer-menu-select) | |
31 | (define-key Buffer-menu-mode-map "2" 'Buffer-menu-2-window) | |
32 | (define-key Buffer-menu-mode-map "1" 'Buffer-menu-1-window) | |
33 | (define-key Buffer-menu-mode-map "f" 'Buffer-menu-this-window) | |
34 | (define-key Buffer-menu-mode-map "o" 'Buffer-menu-other-window) | |
35 | (define-key Buffer-menu-mode-map "s" 'Buffer-menu-save) | |
36 | (define-key Buffer-menu-mode-map "d" 'Buffer-menu-delete) | |
37 | (define-key Buffer-menu-mode-map "k" 'Buffer-menu-delete) | |
38 | (define-key Buffer-menu-mode-map "\C-d" 'Buffer-menu-delete-backwards) | |
39 | (define-key Buffer-menu-mode-map "\C-k" 'Buffer-menu-delete) | |
40 | (define-key Buffer-menu-mode-map "x" 'Buffer-menu-execute) | |
41 | (define-key Buffer-menu-mode-map " " 'next-line) | |
42 | (define-key Buffer-menu-mode-map "n" 'next-line) | |
43 | (define-key Buffer-menu-mode-map "p" 'previous-line) | |
44 | (define-key Buffer-menu-mode-map "\177" 'Buffer-menu-backup-unmark) | |
45 | (define-key Buffer-menu-mode-map "~" 'Buffer-menu-not-modified) | |
46 | (define-key Buffer-menu-mode-map "?" 'describe-mode) | |
47 | (define-key Buffer-menu-mode-map "u" 'Buffer-menu-unmark) | |
48 | (define-key Buffer-menu-mode-map "m" 'Buffer-menu-mark) | |
49 | (define-key Buffer-menu-mode-map "t" 'Buffer-menu-visit-tags-table)) | |
50 | ||
51 | ;; Buffer Menu mode is suitable only for specially formatted data. | |
52 | (put 'Buffer-menu-mode 'mode-class 'special) | |
53 | ||
54 | (defun Buffer-menu-mode () | |
55 | "Major mode for editing a list of buffers. | |
56 | Each line describes one of the buffers in Emacs. | |
57 | Letters do not insert themselves; instead, they are commands. | |
58 | \\<Buffer-menu-mode-map> | |
59 | \\[Buffer-menu-mark] -- mark buffer to be displayed. | |
60 | \\[Buffer-menu-select] -- select buffer of line point is on. | |
61 | Also show buffers marked with m in other windows. | |
62 | \\[Buffer-menu-1-window] -- select that buffer in full-screen window. | |
63 | \\[Buffer-menu-2-window] -- select that buffer in one window, | |
64 | together with buffer selected before this one in another window. | |
65 | \\[Buffer-menu-this-window] -- select that buffer in place of the buffer menu buffer. | |
66 | \\[Buffer-menu-other-window] -- select that buffer in another window, | |
67 | so the buffer menu buffer remains visible in its window. | |
68 | \\[Buffer-menu-visit-tags-table] -- visit-tags-table this buffer. | |
69 | \\[Buffer-menu-not-modified] -- clear modified-flag on that buffer. | |
70 | \\[Buffer-menu-save] -- mark that buffer to be saved, and move down. | |
71 | \\[Buffer-menu-delete] -- mark that buffer to be deleted, and move down. | |
72 | \\[Buffer-menu-delete-backwards] -- mark that buffer to be deleted, and move up. | |
73 | \\[Buffer-menu-execute] -- delete or save marked buffers. | |
74 | \\[Buffer-menu-unmark] -- remove all kinds of marks from current line. | |
75 | \\[Buffer-menu-backup-unmark] -- back up a line and remove marks." | |
76 | (kill-all-local-variables) | |
77 | (use-local-map Buffer-menu-mode-map) | |
78 | (setq truncate-lines t) | |
79 | (setq buffer-read-only t) | |
80 | (setq major-mode 'Buffer-menu-mode) | |
81 | (setq mode-name "Buffer Menu") | |
82 | (run-hooks 'buffer-menu-mode-hook)) | |
83 | \f | |
84 | (defvar Buffer-menu-buffer-column 4) | |
85 | ||
86 | (defun Buffer-menu-buffer (error-if-non-existent-p) | |
87 | "Return buffer described by this line of buffer menu." | |
88 | (save-excursion | |
89 | (beginning-of-line) | |
90 | (forward-char Buffer-menu-buffer-column) | |
91 | (let ((start (point)) | |
92 | string) | |
93 | ;; End of buffer name marked by tab or two spaces. | |
94 | (re-search-forward "\t\\| ") | |
95 | (skip-chars-backward " \t") | |
96 | (setq string (buffer-substring start (point))) | |
97 | (or (get-buffer string) | |
98 | (if error-if-non-existent-p | |
99 | (error "No buffer named \"%s\"" string) | |
100 | nil))))) | |
101 | \f | |
102 | (defun buffer-menu (arg) | |
103 | "Make a menu of buffers so you can save, delete or select them. | |
104 | With argument, show only buffers that are visiting files. | |
105 | Type ? after invocation to get help on commands available. | |
106 | Type q immediately to make the buffer menu go away." | |
107 | (interactive "P") | |
108 | (list-buffers arg) | |
109 | (pop-to-buffer "*Buffer List*") | |
110 | (forward-line 2) | |
111 | (message | |
112 | "Commands: d, s, x; 1, 2, m, u, q; delete; ~; ? for help.")) | |
113 | ||
114 | (defun Buffer-menu-mark () | |
115 | "Mark buffer on this line for being displayed by \\<Buffer-menu-mode-map>\\[Buffer-menu-select] command." | |
116 | (interactive) | |
117 | (beginning-of-line) | |
118 | (if (looking-at " [-M]") | |
119 | (ding) | |
120 | (let ((buffer-read-only nil)) | |
121 | (delete-char 1) | |
122 | (insert ?>) | |
123 | (forward-line 1)))) | |
124 | ||
125 | (defun Buffer-menu-unmark () | |
126 | "Cancel all requested operations on buffer on this line." | |
127 | (interactive) | |
128 | (beginning-of-line) | |
129 | (if (looking-at " [-M]") | |
130 | (ding) | |
131 | (let* ((buf (Buffer-menu-buffer t)) | |
132 | (mod (buffer-modified-p buf)) | |
133 | (readonly (save-excursion (set-buffer buf) buffer-read-only)) | |
134 | (buffer-read-only nil)) | |
135 | (delete-char 3) | |
136 | (insert (if readonly (if mod " *%" " %") (if mod " * " " "))))) | |
137 | (forward-line 1)) | |
138 | ||
139 | (defun Buffer-menu-backup-unmark () | |
140 | "Move up and cancel all requested operations on buffer on line above." | |
141 | (interactive) | |
142 | (forward-line -1) | |
143 | (Buffer-menu-unmark) | |
144 | (forward-line -1)) | |
145 | ||
146 | (defun Buffer-menu-delete () | |
147 | "Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command." | |
148 | (interactive) | |
149 | (beginning-of-line) | |
150 | (if (looking-at " [-M]") ;header lines | |
151 | (ding) | |
152 | (let ((buffer-read-only nil)) | |
153 | (delete-char 1) | |
154 | (insert ?D) | |
155 | (forward-line 1)))) | |
156 | ||
157 | (defun Buffer-menu-delete-backwards () | |
158 | "Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command | |
159 | and then move up one line" | |
160 | (interactive) | |
161 | (Buffer-menu-delete) | |
162 | (forward-line -2) | |
163 | (if (looking-at " [-M]") (forward-line 1))) | |
164 | ||
165 | (defun Buffer-menu-save () | |
166 | "Mark buffer on this line to be saved by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command." | |
167 | (interactive) | |
168 | (beginning-of-line) | |
169 | (forward-char 1) | |
170 | (if (looking-at " [-M]") ;header lines | |
171 | (ding) | |
172 | (let ((buffer-read-only nil)) | |
173 | (delete-char 1) | |
174 | (insert ?S) | |
175 | (forward-line 1)))) | |
176 | ||
177 | (defun Buffer-menu-not-modified () | |
178 | "Mark buffer on this line as unmodified (no changes to save)." | |
179 | (interactive) | |
180 | (save-excursion | |
181 | (set-buffer (Buffer-menu-buffer t)) | |
182 | (set-buffer-modified-p nil)) | |
183 | (save-excursion | |
184 | (beginning-of-line) | |
185 | (forward-char 1) | |
186 | (if (looking-at "\\*") | |
187 | (let ((buffer-read-only nil)) | |
188 | (delete-char 1) | |
189 | (insert ? ))))) | |
190 | ||
191 | (defun Buffer-menu-execute () | |
192 | "Save and/or delete buffers marked with \\<Buffer-menu-mode-map>\\[Buffer-menu-save] or \\<Buffer-menu-mode-map>\\[Buffer-menu-delete] commands." | |
193 | (interactive) | |
194 | (save-excursion | |
195 | (goto-char (point-min)) | |
196 | (forward-line 1) | |
197 | (while (re-search-forward "^.S" nil t) | |
198 | (let ((modp nil)) | |
199 | (save-excursion | |
200 | (set-buffer (Buffer-menu-buffer t)) | |
201 | (save-buffer) | |
202 | (setq modp (buffer-modified-p))) | |
203 | (let ((buffer-read-only nil)) | |
204 | (delete-char -1) | |
205 | (insert (if modp ?* ? )))))) | |
206 | (save-excursion | |
207 | (goto-char (point-min)) | |
208 | (forward-line 1) | |
209 | (let ((buff-menu-buffer (current-buffer)) | |
210 | (buffer-read-only nil)) | |
211 | (while (search-forward "\nD" nil t) | |
212 | (forward-char -1) | |
213 | (let ((buf (Buffer-menu-buffer nil))) | |
214 | (or (eq buf nil) | |
215 | (eq buf buff-menu-buffer) | |
216 | (save-excursion (kill-buffer buf)))) | |
217 | (if (Buffer-menu-buffer nil) | |
218 | (progn (delete-char 1) | |
219 | (insert ? )) | |
220 | (delete-region (point) (progn (forward-line 1) (point))) | |
221 | (forward-char -1)))))) | |
222 | ||
223 | (defun Buffer-menu-select () | |
224 | "Select this line's buffer; also display buffers marked with `>'. | |
225 | You can mark buffers with the \\<Buffer-menu-mode-map>\\[Buffer-menu-mark] command." | |
226 | (interactive) | |
227 | (let ((buff (Buffer-menu-buffer t)) | |
228 | (menu (current-buffer)) | |
229 | (others ()) | |
230 | tem) | |
231 | (goto-char (point-min)) | |
232 | (while (search-forward "\n>" nil t) | |
233 | (setq tem (Buffer-menu-buffer t)) | |
234 | (let ((buffer-read-only nil)) | |
235 | (delete-char -1) | |
236 | (insert ?\ )) | |
237 | (or (eq tem buff) (memq tem others) (setq others (cons tem others)))) | |
238 | (setq others (nreverse others) | |
239 | tem (/ (1- (screen-height)) (1+ (length others)))) | |
240 | (delete-other-windows) | |
241 | (switch-to-buffer buff) | |
242 | (or (eq menu buff) | |
243 | (bury-buffer menu)) | |
244 | (while others | |
245 | (split-window nil tem) | |
246 | (other-window 1) | |
247 | (switch-to-buffer (car others)) | |
248 | (setq others (cdr others))) | |
249 | (other-window 1))) ;back to the beginning! | |
250 | \f | |
251 | (defun Buffer-menu-visit-tags-table () | |
252 | "Visit the tags table in the buffer on this line. See `visit-tags-table'." | |
253 | (interactive) | |
254 | (let ((file (buffer-file-name (Buffer-menu-buffer t)))) | |
255 | (if file | |
256 | (visit-tags-table file) | |
257 | (error "Specified buffer has no file")))) | |
258 | ||
259 | (defun Buffer-menu-1-window () | |
260 | "Select this line's buffer, alone, in full screen." | |
261 | (interactive) | |
262 | (switch-to-buffer (Buffer-menu-buffer t)) | |
263 | (bury-buffer (other-buffer)) | |
264 | (delete-other-windows)) | |
265 | ||
266 | (defun Buffer-menu-this-window () | |
267 | "Select this line's buffer in this window." | |
268 | (interactive) | |
269 | (switch-to-buffer (Buffer-menu-buffer t))) | |
270 | ||
271 | (defun Buffer-menu-other-window () | |
272 | "Select this line's buffer in other window, leaving buffer menu visible." | |
273 | (interactive) | |
274 | (switch-to-buffer-other-window (Buffer-menu-buffer t))) | |
275 | ||
276 | (defun Buffer-menu-2-window () | |
277 | "Select this line's buffer, with previous buffer in second window." | |
278 | (interactive) | |
279 | (let ((buff (Buffer-menu-buffer t)) | |
280 | (menu (current-buffer)) | |
281 | (pop-up-windows t)) | |
282 | (switch-to-buffer (other-buffer)) | |
283 | (pop-to-buffer buff) | |
284 | (bury-buffer menu))) |