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e62f3872 C |
1 | ; buggestions to mly@ai.ai.mit.edu |
2 | ||
3 | ;; who says one can't have typeout windows in gnu emacs? | |
4 | ;; like ^r select buffer from its emacs lunar or tmacs libraries. | |
5 | ||
6 | ;; Copyright (C) 1985, 1986 Free Software Foundation, Inc. | |
7 | ||
8 | ;; This file is part of GNU Emacs. | |
9 | ||
10 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
11 | ;; it under the terms of the GNU General Public License as published by | |
12 | ;; the Free Software Foundation; either version 1, or (at your option) | |
13 | ;; any later version. | |
14 | ||
15 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;; GNU General Public License for more details. | |
19 | ||
20 | ;; You should have received a copy of the GNU General Public License | |
21 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
22 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | ||
24 | ||
25 | (require 'electric) | |
26 | ||
27 | ;; this depends on the format of list-buffers (from src/buffer.c) and | |
28 | ;; on stuff in lisp/buff-menu.el | |
29 | ||
30 | (defvar electric-buffer-menu-mode-map nil) | |
31 | (defun electric-buffer-list (arg) | |
32 | "Vaguely like ITS lunar select buffer; | |
33 | combining typeoutoid buffer listing with menuoid buffer selection. | |
34 | ||
35 | This pops up a buffer describing the set of emacs buffers. | |
36 | If the very next character typed is a space then the buffer list | |
37 | window disappears. | |
38 | ||
39 | Otherwise, one may move around in the buffer list window, marking | |
40 | buffers to be selected, saved or deleted. | |
41 | ||
42 | To exit and select a new buffer, type Space when the cursor is on the | |
43 | appropriate line of the buffer-list window. | |
44 | ||
45 | Other commands are much like those of buffer-menu-mode. | |
46 | ||
47 | Calls value of electric-buffer-menu-mode-hook on entry if non-nil. | |
48 | ||
49 | \\{electric-buffer-menu-mode-map}" | |
50 | (interactive "P") | |
51 | (let (select buffer) | |
52 | (save-window-excursion | |
53 | (save-window-excursion (list-buffers arg)) | |
54 | (setq buffer (window-buffer (Electric-pop-up-window "*Buffer List*"))) | |
55 | (unwind-protect | |
56 | (progn | |
57 | (set-buffer buffer) | |
58 | (Electric-buffer-menu-mode) | |
59 | (setq select | |
60 | (catch 'electric-buffer-menu-select | |
61 | (message "<<< Press Space to bury the buffer list >>>") | |
62 | (if (= (setq unread-command-char (read-char)) ?\ ) | |
63 | (progn (setq unread-command-char -1) | |
64 | (throw 'electric-buffer-menu-select nil))) | |
65 | (let ((first (progn (goto-char (point-min)) | |
66 | (forward-line 2) | |
67 | (point))) | |
68 | (last (progn (goto-char (point-max)) | |
69 | (forward-line -1) | |
70 | (point))) | |
71 | (goal-column 0)) | |
72 | (goto-char first) | |
73 | (Electric-command-loop 'electric-buffer-menu-select | |
74 | nil | |
75 | t | |
76 | 'electric-buffer-menu-looper | |
77 | (cons first last)))))) | |
78 | (set-buffer buffer) | |
79 | (Buffer-menu-mode) | |
80 | (bury-buffer buffer) | |
81 | (message ""))) | |
82 | (if select | |
83 | (progn (set-buffer buffer) | |
84 | (let ((opoint (point-marker))) | |
85 | (Buffer-menu-execute) | |
86 | (goto-char (point-min)) | |
87 | (if (prog1 (search-forward "\n>" nil t) | |
88 | (goto-char opoint) (set-marker opoint nil)) | |
89 | (Buffer-menu-select) | |
90 | (switch-to-buffer (Buffer-menu-buffer t)))))))) | |
91 | ||
92 | (defun electric-buffer-menu-looper (state condition) | |
93 | (cond ((and condition | |
94 | (not (memq (car condition) '(buffer-read-only | |
95 | end-of-buffer | |
96 | beginning-of-buffer)))) | |
97 | (signal (car condition) (cdr condition))) | |
98 | ((< (point) (car state)) | |
99 | (goto-char (point-min)) | |
100 | (forward-line 2)) | |
101 | ((> (point) (cdr state)) | |
102 | (goto-char (point-max)) | |
103 | (forward-line -1) | |
104 | (if (pos-visible-in-window-p (point-max)) | |
105 | (recenter -1))))) | |
106 | ||
107 | (put 'Electric-buffer-menu-mode 'mode-class 'special) | |
108 | (defun Electric-buffer-menu-mode () | |
109 | "Major mode for editing a list of buffers. | |
110 | Each line describes one of the buffers in Emacs. | |
111 | Letters do not insert themselves; instead, they are commands. | |
112 | \\{electric-buffer-menu-mode-map} | |
113 | ||
114 | C-g or C-c C-c -- exit buffer menu, returning to previous window and buffer | |
115 | configuration. If the very first character typed is a space, it | |
116 | also has this effect. | |
117 | Space -- select buffer of line point is on. | |
118 | Also show buffers marked with m in other windows, | |
119 | deletes buffers marked with \"D\", and saves those marked with \"S\". | |
120 | m -- mark buffer to be displayed. | |
121 | ~ -- clear modified-flag on that buffer. | |
122 | s -- mark that buffer to be saved. | |
123 | d or C-d -- mark that buffer to be deleted. | |
124 | u -- remove all kinds of marks from current line. | |
125 | v -- view buffer, returning when done. | |
126 | Delete -- back up a line and remove marks. | |
127 | ||
128 | ||
129 | Entry to this mode via command \\[electric-buffer-list] calls the value of | |
130 | electric-buffer-menu-mode-hook if it is non-nil." | |
131 | (kill-all-local-variables) | |
132 | (use-local-map electric-buffer-menu-mode-map) | |
133 | (setq mode-name "Electric Buffer Menu") | |
134 | (setq mode-line-buffer-identification "Electric Buffer List") | |
135 | (if (memq 'mode-name mode-line-format) | |
136 | (progn (setq mode-line-format (copy-sequence mode-line-format)) | |
137 | (setcar (memq 'mode-name mode-line-format) "Buffers"))) | |
138 | (make-local-variable 'Helper-return-blurb) | |
139 | (setq Helper-return-blurb "return to buffer editing") | |
140 | (setq truncate-lines t) | |
141 | (setq buffer-read-only t) | |
142 | (setq major-mode 'Electric-buffer-menu-mode) | |
143 | (goto-char (point-min)) | |
144 | (if (search-forward "\n." nil t) (forward-char -1)) | |
145 | (run-hooks 'electric-buffer-menu-mode-hook)) | |
146 | ||
147 | ;; generally the same as Buffer-menu-mode-map | |
148 | ;; (except we don't indirect to global-map) | |
149 | (put 'Electric-buffer-menu-undefined 'suppress-keymap t) | |
150 | (if electric-buffer-menu-mode-map | |
151 | nil | |
152 | (let ((map (make-keymap))) | |
153 | (fillarray map 'Electric-buffer-menu-undefined) | |
154 | (define-key map "\e" (make-keymap)) | |
155 | (fillarray (lookup-key map "\e") 'Electric-buffer-menu-undefined) | |
156 | (define-key map "\C-z" 'suspend-emacs) | |
157 | (define-key map "v" 'Electric-buffer-menu-mode-view-buffer) | |
158 | (define-key map "\C-h" 'Helper-help) | |
159 | (define-key map "?" 'Helper-describe-bindings) | |
160 | (define-key map "\C-c" nil) | |
161 | (define-key map "\C-c\C-c" 'Electric-buffer-menu-quit) | |
162 | (define-key map "\C-]" 'Electric-buffer-menu-quit) | |
163 | (define-key map "q" 'Electric-buffer-menu-quit) | |
164 | (define-key map " " 'Electric-buffer-menu-select) | |
165 | (define-key map "\C-l" 'recenter) | |
166 | (define-key map "s" 'Buffer-menu-save) | |
167 | (define-key map "d" 'Buffer-menu-delete) | |
168 | (define-key map "k" 'Buffer-menu-delete) | |
169 | (define-key map "\C-d" 'Buffer-menu-delete-backwards) | |
170 | ;(define-key map "\C-k" 'Buffer-menu-delete) | |
171 | (define-key map "\177" 'Buffer-menu-backup-unmark) | |
172 | (define-key map "~" 'Buffer-menu-not-modified) | |
173 | (define-key map "u" 'Buffer-menu-unmark) | |
174 | (let ((i ?0)) | |
175 | (while (<= i ?9) | |
176 | (define-key map (char-to-string i) 'digit-argument) | |
177 | (define-key map (concat "\e" (char-to-string i)) 'digit-argument) | |
178 | (setq i (1+ i)))) | |
179 | (define-key map "-" 'negative-argument) | |
180 | (define-key map "\e-" 'negative-argument) | |
181 | (define-key map "m" 'Buffer-menu-mark) | |
182 | (define-key map "\C-u" 'universal-argument) | |
183 | (define-key map "\C-p" 'previous-line) | |
184 | (define-key map "\C-n" 'next-line) | |
185 | (define-key map "p" 'previous-line) | |
186 | (define-key map "n" 'next-line) | |
187 | (define-key map "\C-v" 'scroll-up) | |
188 | (define-key map "\ev" 'scroll-down) | |
189 | (define-key map "\e\C-v" 'scroll-other-window) | |
190 | (define-key map "\e>" 'end-of-buffer) | |
191 | (define-key map "\e<" 'beginning-of-buffer) | |
192 | (setq electric-buffer-menu-mode-map map))) | |
193 | ||
194 | (defun Electric-buffer-menu-exit () | |
195 | (interactive) | |
196 | (setq unread-command-char last-input-char) | |
197 | ;; for robustness | |
198 | (condition-case () | |
199 | (throw 'electric-buffer-menu-select nil) | |
200 | (error (Buffer-menu-mode) | |
201 | (other-buffer)))) | |
202 | ||
203 | (defun Electric-buffer-menu-select () | |
204 | "Leave Electric Buffer Menu, selecting buffers and executing changes. | |
205 | Saves buffers marked \"S\". Deletes buffers marked \"K\". | |
206 | Selects buffer at point and displays buffers marked \">\" in other | |
207 | windows." | |
208 | (interactive) | |
209 | (throw 'electric-buffer-menu-select (point))) | |
210 | ||
211 | (defun Electric-buffer-menu-quit () | |
212 | "Leave Electric Buffer Menu, restoring previous window configuration. | |
213 | Does not execute select, save, or delete commands." | |
214 | (interactive) | |
215 | (throw 'electric-buffer-menu-select nil)) | |
216 | ||
217 | (defun Electric-buffer-menu-undefined () | |
218 | (interactive) | |
219 | (ding) | |
220 | (message (if (and (eq (key-binding "\C-c\C-c") 'Electric-buffer-menu-quit) | |
221 | (eq (key-binding " ") 'Electric-buffer-menu-select) | |
222 | (eq (key-binding "\C-h") 'Helper-help) | |
223 | (eq (key-binding "?") 'Helper-describe-bindings)) | |
224 | "Type C-c C-c to exit, Space to select, C-h for help, ? for commands" | |
225 | (substitute-command-keys "\ | |
226 | Type \\[Electric-buffer-menu-quit] to exit, \ | |
227 | \\[Electric-buffer-menu-select] to select, \ | |
228 | \\[Helper-help] for help, \\[Helper-describe-bindings] for commands."))) | |
229 | (sit-for 4)) | |
230 | ||
231 | (defun Electric-buffer-menu-mode-view-buffer () | |
232 | "View buffer on current line in Electric Buffer Menu. | |
233 | Returns to Electric Buffer Menu when done." | |
234 | (interactive) | |
235 | (let ((bufnam (Buffer-menu-buffer nil))) | |
236 | (if bufnam | |
237 | (view-buffer bufnam) | |
238 | (ding) | |
239 | (message "Buffer %s does not exist!" bufnam) | |
240 | (sit-for 4)))) | |
241 | ||
242 | ||
243 | ||
244 |