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1 | ;;; ebuff-menu.el --- electric-buffer-list mode |
2 | ||
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3 | ;; Copyright (C) 1985, 1986 Free Software Foundation, Inc. |
4 | ||
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5 | ;; Author: Richard Mlynarik <mly@ai.mit.edu> |
6 | ||
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7 | ;; This file is part of GNU Emacs. |
8 | ||
9 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
10 | ;; it under the terms of the GNU General Public License as published by | |
e5167999 | 11 | ;; the Free Software Foundation; either version 2, or (at your option) |
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12 | ;; any later version. |
13 | ||
14 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
15 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | ;; GNU General Public License for more details. | |
18 | ||
19 | ;; You should have received a copy of the GNU General Public License | |
20 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
21 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | ||
e5167999 ER |
23 | ;;; Commentary: |
24 | ||
e41b2db1 ER |
25 | ;; Who says one can't have typeout windows in GNU Emacs? The entry |
26 | ;; point, `electric-buffer-list' works like ^r select buffer from the | |
27 | ;; ITS Emacs lunar or tmacs libraries. | |
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28 | |
29 | ;;; Code: | |
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30 | |
31 | (require 'electric) | |
32 | ||
33 | ;; this depends on the format of list-buffers (from src/buffer.c) and | |
34 | ;; on stuff in lisp/buff-menu.el | |
35 | ||
36 | (defvar electric-buffer-menu-mode-map nil) | |
37 | ||
38 | ;;;###autoload | |
39 | (defun electric-buffer-list (arg) | |
40 | "Pops up a buffer describing the set of Emacs buffers. | |
41 | Vaguely like ITS lunar select buffer; combining typeoutoid buffer | |
42 | listing with menuoid buffer selection. | |
43 | ||
44 | If the very next character typed is a space then the buffer list | |
45 | window disappears. Otherwise, one may move around in the buffer list | |
46 | window, marking buffers to be selected, saved or deleted. | |
47 | ||
48 | To exit and select a new buffer, type a space when the cursor is on | |
49 | the appropriate line of the buffer-list window. Other commands are | |
50 | much like those of buffer-menu-mode. | |
51 | ||
52 | Calls value of `electric-buffer-menu-mode-hook' on entry if non-nil. | |
53 | ||
54 | \\{electric-buffer-menu-mode-map}" | |
55 | (interactive "P") | |
56 | (let (select buffer) | |
57 | (save-window-excursion | |
58 | (save-window-excursion (list-buffers arg)) | |
59 | (setq buffer (window-buffer (Electric-pop-up-window "*Buffer List*"))) | |
60 | (unwind-protect | |
61 | (progn | |
62 | (set-buffer buffer) | |
63 | (Electric-buffer-menu-mode) | |
64 | (setq select | |
65 | (catch 'electric-buffer-menu-select | |
66 | (message "<<< Press Space to bury the buffer list >>>") | |
d42cc509 RS |
67 | (if (eq (setq unread-command-events (list (read-event))) |
68 | ?\ ) | |
dbc4e1c1 | 69 | (progn (setq unread-command-events nil) |
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70 | (throw 'electric-buffer-menu-select nil))) |
71 | (let ((first (progn (goto-char (point-min)) | |
72 | (forward-line 2) | |
73 | (point))) | |
74 | (last (progn (goto-char (point-max)) | |
75 | (forward-line -1) | |
76 | (point))) | |
77 | (goal-column 0)) | |
78 | (goto-char first) | |
79 | (Electric-command-loop 'electric-buffer-menu-select | |
80 | nil | |
81 | t | |
82 | 'electric-buffer-menu-looper | |
83 | (cons first last)))))) | |
84 | (set-buffer buffer) | |
85 | (Buffer-menu-mode) | |
86 | (bury-buffer buffer) | |
87 | (message ""))) | |
88 | (if select | |
89 | (progn (set-buffer buffer) | |
90 | (let ((opoint (point-marker))) | |
91 | (Buffer-menu-execute) | |
92 | (goto-char (point-min)) | |
93 | (if (prog1 (search-forward "\n>" nil t) | |
94 | (goto-char opoint) (set-marker opoint nil)) | |
95 | (Buffer-menu-select) | |
96 | (switch-to-buffer (Buffer-menu-buffer t)))))))) | |
97 | ||
98 | (defun electric-buffer-menu-looper (state condition) | |
99 | (cond ((and condition | |
100 | (not (memq (car condition) '(buffer-read-only | |
101 | end-of-buffer | |
102 | beginning-of-buffer)))) | |
103 | (signal (car condition) (cdr condition))) | |
104 | ((< (point) (car state)) | |
105 | (goto-char (point-min)) | |
106 | (forward-line 2)) | |
107 | ((> (point) (cdr state)) | |
108 | (goto-char (point-max)) | |
109 | (forward-line -1) | |
110 | (if (pos-visible-in-window-p (point-max)) | |
111 | (recenter -1))))) | |
112 | ||
113 | (put 'Electric-buffer-menu-mode 'mode-class 'special) | |
114 | (defun Electric-buffer-menu-mode () | |
115 | "Major mode for editing a list of buffers. | |
116 | Each line describes one of the buffers in Emacs. | |
117 | Letters do not insert themselves; instead, they are commands. | |
118 | \\<electric-buffer-menu-mode-map> | |
119 | \\[keyboard-quit] or \\[Electric-buffer-menu-quit] -- exit buffer menu, returning to previous window and buffer | |
120 | configuration. If the very first character typed is a space, it | |
121 | also has this effect. | |
122 | \\[Electric-buffer-menu-select] -- select buffer of line point is on. | |
123 | Also show buffers marked with m in other windows, | |
124 | deletes buffers marked with \"D\", and saves those marked with \"S\". | |
125 | \\[Buffer-menu-mark] -- mark buffer to be displayed. | |
126 | \\[Buffer-menu-not-modified] -- clear modified-flag on that buffer. | |
127 | \\[Buffer-menu-save] -- mark that buffer to be saved. | |
128 | \\[Buffer-menu-delete] or \\[Buffer-menu-delete-backwards] -- mark that buffer to be deleted. | |
129 | \\[Buffer-menu-unmark] -- remove all kinds of marks from current line. | |
130 | \\[Electric-buffer-menu-mode-view-buffer] -- view buffer, returning when done. | |
131 | \\[Buffer-menu-backup-unmark] -- back up a line and remove marks. | |
132 | ||
133 | \\{electric-buffer-menu-mode-map} | |
134 | ||
135 | Entry to this mode via command electric-buffer-list calls the value of | |
136 | electric-buffer-menu-mode-hook if it is non-nil." | |
137 | (kill-all-local-variables) | |
138 | (use-local-map electric-buffer-menu-mode-map) | |
139 | (setq mode-name "Electric Buffer Menu") | |
140 | (setq mode-line-buffer-identification "Electric Buffer List") | |
141 | (make-local-variable 'Helper-return-blurb) | |
142 | (setq Helper-return-blurb "return to buffer editing") | |
143 | (setq truncate-lines t) | |
144 | (setq buffer-read-only t) | |
145 | (setq major-mode 'Electric-buffer-menu-mode) | |
146 | (goto-char (point-min)) | |
147 | (if (search-forward "\n." nil t) (forward-char -1)) | |
148 | (run-hooks 'electric-buffer-menu-mode-hook)) | |
149 | ||
150 | ;; generally the same as Buffer-menu-mode-map | |
151 | ;; (except we don't indirect to global-map) | |
152 | (put 'Electric-buffer-menu-undefined 'suppress-keymap t) | |
153 | (if electric-buffer-menu-mode-map | |
154 | nil | |
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155 | (let ((map (make-keymap)) (submap (make-keymap))) |
156 | (fillarray (car (cdr map)) 'Electric-buffer-menu-undefined) | |
157 | (define-key map "\e" submap) | |
158 | (fillarray (car (cdr submap)) 'Electric-buffer-menu-undefined) | |
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159 | (define-key map "\C-z" 'suspend-emacs) |
160 | (define-key map "v" 'Electric-buffer-menu-mode-view-buffer) | |
8892e83c | 161 | (define-key map (char-to-string help-char) 'Helper-help) |
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162 | (define-key map "?" 'Helper-describe-bindings) |
163 | (define-key map "\C-c" nil) | |
164 | (define-key map "\C-c\C-c" 'Electric-buffer-menu-quit) | |
165 | (define-key map "\C-]" 'Electric-buffer-menu-quit) | |
166 | (define-key map "q" 'Electric-buffer-menu-quit) | |
167 | (define-key map " " 'Electric-buffer-menu-select) | |
168 | (define-key map "\C-l" 'recenter) | |
169 | (define-key map "s" 'Buffer-menu-save) | |
170 | (define-key map "d" 'Buffer-menu-delete) | |
171 | (define-key map "k" 'Buffer-menu-delete) | |
172 | (define-key map "\C-d" 'Buffer-menu-delete-backwards) | |
173 | ;(define-key map "\C-k" 'Buffer-menu-delete) | |
174 | (define-key map "\177" 'Buffer-menu-backup-unmark) | |
175 | (define-key map "~" 'Buffer-menu-not-modified) | |
176 | (define-key map "u" 'Buffer-menu-unmark) | |
177 | (let ((i ?0)) | |
178 | (while (<= i ?9) | |
179 | (define-key map (char-to-string i) 'digit-argument) | |
180 | (define-key map (concat "\e" (char-to-string i)) 'digit-argument) | |
181 | (setq i (1+ i)))) | |
182 | (define-key map "-" 'negative-argument) | |
183 | (define-key map "\e-" 'negative-argument) | |
184 | (define-key map "m" 'Buffer-menu-mark) | |
185 | (define-key map "\C-u" 'universal-argument) | |
186 | (define-key map "\C-p" 'previous-line) | |
187 | (define-key map "\C-n" 'next-line) | |
188 | (define-key map "p" 'previous-line) | |
189 | (define-key map "n" 'next-line) | |
190 | (define-key map "\C-v" 'scroll-up) | |
191 | (define-key map "\ev" 'scroll-down) | |
192 | (define-key map ">" 'scroll-right) | |
193 | (define-key map "<" 'scroll-left) | |
194 | (define-key map "\e\C-v" 'scroll-other-window) | |
195 | (define-key map "\e>" 'end-of-buffer) | |
196 | (define-key map "\e<" 'beginning-of-buffer) | |
197 | (setq electric-buffer-menu-mode-map map))) | |
198 | ||
199 | (defun Electric-buffer-menu-exit () | |
200 | (interactive) | |
d42cc509 | 201 | (setq unread-command-events (listify-key-sequence (this-command-keys))) |
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202 | ;; for robustness |
203 | (condition-case () | |
204 | (throw 'electric-buffer-menu-select nil) | |
205 | (error (Buffer-menu-mode) | |
206 | (other-buffer)))) | |
207 | ||
208 | (defun Electric-buffer-menu-select () | |
209 | "Leave Electric Buffer Menu, selecting buffers and executing changes. | |
210 | Saves buffers marked \"S\". Deletes buffers marked \"K\". | |
211 | Selects buffer at point and displays buffers marked \">\" in other windows." | |
212 | (interactive) | |
213 | (throw 'electric-buffer-menu-select (point))) | |
214 | ||
215 | (defun Electric-buffer-menu-quit () | |
216 | "Leave Electric Buffer Menu, restoring previous window configuration. | |
217 | Does not execute select, save, or delete commands." | |
218 | (interactive) | |
219 | (throw 'electric-buffer-menu-select nil)) | |
220 | ||
221 | (defun Electric-buffer-menu-undefined () | |
222 | (interactive) | |
223 | (ding) | |
224 | (message (if (and (eq (key-binding "\C-c\C-c") 'Electric-buffer-menu-quit) | |
225 | (eq (key-binding " ") 'Electric-buffer-menu-select) | |
e17d2fd1 | 226 | (eq (key-binding (char-to-string help-char)) 'Helper-help) |
2076c87c | 227 | (eq (key-binding "?") 'Helper-describe-bindings)) |
573cd924 | 228 | (substitute-command-keys "Type C-c C-c to exit, Space to select, \\[Helper-help] for help, ? for commands") |
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229 | (substitute-command-keys "\ |
230 | Type \\[Electric-buffer-menu-quit] to exit, \ | |
231 | \\[Electric-buffer-menu-select] to select, \ | |
232 | \\[Helper-help] for help, \\[Helper-describe-bindings] for commands."))) | |
233 | (sit-for 4)) | |
234 | ||
235 | (defun Electric-buffer-menu-mode-view-buffer () | |
236 | "View buffer on current line in Electric Buffer Menu. | |
237 | Returns to Electric Buffer Menu when done." | |
238 | (interactive) | |
239 | (let ((bufnam (Buffer-menu-buffer nil))) | |
240 | (if bufnam | |
241 | (view-buffer bufnam) | |
242 | (ding) | |
243 | (message "Buffer %s does not exist!" bufnam) | |
244 | (sit-for 4)))) | |
245 | ||
c0274f38 | 246 | ;;; ebuff-menu.el ends here |