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1 | ;;; ebuff-menu.el --- electric-buffer-list mode |
2 | ||
2076c87c JB |
3 | ;; Copyright (C) 1985, 1986 Free Software Foundation, Inc. |
4 | ||
3a801d0c ER |
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) |
2076c87c JB |
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 | ||
25 | ;; who says one can't have typeout windows in gnu emacs? | |
26 | ;; like ^r select buffer from its emacs lunar or tmacs libraries. | |
27 | ||
28 | ;;; Code: | |
2076c87c JB |
29 | |
30 | (require 'electric) | |
31 | ||
32 | ;; this depends on the format of list-buffers (from src/buffer.c) and | |
33 | ;; on stuff in lisp/buff-menu.el | |
34 | ||
35 | (defvar electric-buffer-menu-mode-map nil) | |
36 | ||
37 | ;;;###autoload | |
38 | (defun electric-buffer-list (arg) | |
39 | "Pops up a buffer describing the set of Emacs buffers. | |
40 | Vaguely like ITS lunar select buffer; combining typeoutoid buffer | |
41 | listing with menuoid buffer selection. | |
42 | ||
43 | If the very next character typed is a space then the buffer list | |
44 | window disappears. Otherwise, one may move around in the buffer list | |
45 | window, marking buffers to be selected, saved or deleted. | |
46 | ||
47 | To exit and select a new buffer, type a space when the cursor is on | |
48 | the appropriate line of the buffer-list window. Other commands are | |
49 | much like those of buffer-menu-mode. | |
50 | ||
51 | Calls value of `electric-buffer-menu-mode-hook' on entry if non-nil. | |
52 | ||
53 | \\{electric-buffer-menu-mode-map}" | |
54 | (interactive "P") | |
55 | (let (select buffer) | |
56 | (save-window-excursion | |
57 | (save-window-excursion (list-buffers arg)) | |
58 | (setq buffer (window-buffer (Electric-pop-up-window "*Buffer List*"))) | |
59 | (unwind-protect | |
60 | (progn | |
61 | (set-buffer buffer) | |
62 | (Electric-buffer-menu-mode) | |
63 | (setq select | |
64 | (catch 'electric-buffer-menu-select | |
65 | (message "<<< Press Space to bury the buffer list >>>") | |
dbc4e1c1 JB |
66 | (if (= (setq unread-command-events (list (read-char))) ?\ ) |
67 | (progn (setq unread-command-events nil) | |
2076c87c JB |
68 | (throw 'electric-buffer-menu-select nil))) |
69 | (let ((first (progn (goto-char (point-min)) | |
70 | (forward-line 2) | |
71 | (point))) | |
72 | (last (progn (goto-char (point-max)) | |
73 | (forward-line -1) | |
74 | (point))) | |
75 | (goal-column 0)) | |
76 | (goto-char first) | |
77 | (Electric-command-loop 'electric-buffer-menu-select | |
78 | nil | |
79 | t | |
80 | 'electric-buffer-menu-looper | |
81 | (cons first last)))))) | |
82 | (set-buffer buffer) | |
83 | (Buffer-menu-mode) | |
84 | (bury-buffer buffer) | |
85 | (message ""))) | |
86 | (if select | |
87 | (progn (set-buffer buffer) | |
88 | (let ((opoint (point-marker))) | |
89 | (Buffer-menu-execute) | |
90 | (goto-char (point-min)) | |
91 | (if (prog1 (search-forward "\n>" nil t) | |
92 | (goto-char opoint) (set-marker opoint nil)) | |
93 | (Buffer-menu-select) | |
94 | (switch-to-buffer (Buffer-menu-buffer t)))))))) | |
95 | ||
96 | (defun electric-buffer-menu-looper (state condition) | |
97 | (cond ((and condition | |
98 | (not (memq (car condition) '(buffer-read-only | |
99 | end-of-buffer | |
100 | beginning-of-buffer)))) | |
101 | (signal (car condition) (cdr condition))) | |
102 | ((< (point) (car state)) | |
103 | (goto-char (point-min)) | |
104 | (forward-line 2)) | |
105 | ((> (point) (cdr state)) | |
106 | (goto-char (point-max)) | |
107 | (forward-line -1) | |
108 | (if (pos-visible-in-window-p (point-max)) | |
109 | (recenter -1))))) | |
110 | ||
111 | (put 'Electric-buffer-menu-mode 'mode-class 'special) | |
112 | (defun Electric-buffer-menu-mode () | |
113 | "Major mode for editing a list of buffers. | |
114 | Each line describes one of the buffers in Emacs. | |
115 | Letters do not insert themselves; instead, they are commands. | |
116 | \\<electric-buffer-menu-mode-map> | |
117 | \\[keyboard-quit] or \\[Electric-buffer-menu-quit] -- exit buffer menu, returning to previous window and buffer | |
118 | configuration. If the very first character typed is a space, it | |
119 | also has this effect. | |
120 | \\[Electric-buffer-menu-select] -- select buffer of line point is on. | |
121 | Also show buffers marked with m in other windows, | |
122 | deletes buffers marked with \"D\", and saves those marked with \"S\". | |
123 | \\[Buffer-menu-mark] -- mark buffer to be displayed. | |
124 | \\[Buffer-menu-not-modified] -- clear modified-flag on that buffer. | |
125 | \\[Buffer-menu-save] -- mark that buffer to be saved. | |
126 | \\[Buffer-menu-delete] or \\[Buffer-menu-delete-backwards] -- mark that buffer to be deleted. | |
127 | \\[Buffer-menu-unmark] -- remove all kinds of marks from current line. | |
128 | \\[Electric-buffer-menu-mode-view-buffer] -- view buffer, returning when done. | |
129 | \\[Buffer-menu-backup-unmark] -- back up a line and remove marks. | |
130 | ||
131 | \\{electric-buffer-menu-mode-map} | |
132 | ||
133 | Entry to this mode via command electric-buffer-list calls the value of | |
134 | electric-buffer-menu-mode-hook if it is non-nil." | |
135 | (kill-all-local-variables) | |
136 | (use-local-map electric-buffer-menu-mode-map) | |
137 | (setq mode-name "Electric Buffer Menu") | |
138 | (setq mode-line-buffer-identification "Electric Buffer List") | |
139 | (make-local-variable 'Helper-return-blurb) | |
140 | (setq Helper-return-blurb "return to buffer editing") | |
141 | (setq truncate-lines t) | |
142 | (setq buffer-read-only t) | |
143 | (setq major-mode 'Electric-buffer-menu-mode) | |
144 | (goto-char (point-min)) | |
145 | (if (search-forward "\n." nil t) (forward-char -1)) | |
146 | (run-hooks 'electric-buffer-menu-mode-hook)) | |
147 | ||
148 | ;; generally the same as Buffer-menu-mode-map | |
149 | ;; (except we don't indirect to global-map) | |
150 | (put 'Electric-buffer-menu-undefined 'suppress-keymap t) | |
151 | (if electric-buffer-menu-mode-map | |
152 | nil | |
153 | (let ((map (make-keymap))) | |
154 | (fillarray map 'Electric-buffer-menu-undefined) | |
155 | (define-key map "\e" (make-keymap)) | |
156 | (fillarray (lookup-key map "\e") 'Electric-buffer-menu-undefined) | |
157 | (define-key map "\C-z" 'suspend-emacs) | |
158 | (define-key map "v" 'Electric-buffer-menu-mode-view-buffer) | |
8892e83c | 159 | (define-key map (char-to-string help-char) 'Helper-help) |
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160 | (define-key map "?" 'Helper-describe-bindings) |
161 | (define-key map "\C-c" nil) | |
162 | (define-key map "\C-c\C-c" 'Electric-buffer-menu-quit) | |
163 | (define-key map "\C-]" 'Electric-buffer-menu-quit) | |
164 | (define-key map "q" 'Electric-buffer-menu-quit) | |
165 | (define-key map " " 'Electric-buffer-menu-select) | |
166 | (define-key map "\C-l" 'recenter) | |
167 | (define-key map "s" 'Buffer-menu-save) | |
168 | (define-key map "d" 'Buffer-menu-delete) | |
169 | (define-key map "k" 'Buffer-menu-delete) | |
170 | (define-key map "\C-d" 'Buffer-menu-delete-backwards) | |
171 | ;(define-key map "\C-k" 'Buffer-menu-delete) | |
172 | (define-key map "\177" 'Buffer-menu-backup-unmark) | |
173 | (define-key map "~" 'Buffer-menu-not-modified) | |
174 | (define-key map "u" 'Buffer-menu-unmark) | |
175 | (let ((i ?0)) | |
176 | (while (<= i ?9) | |
177 | (define-key map (char-to-string i) 'digit-argument) | |
178 | (define-key map (concat "\e" (char-to-string i)) 'digit-argument) | |
179 | (setq i (1+ i)))) | |
180 | (define-key map "-" 'negative-argument) | |
181 | (define-key map "\e-" 'negative-argument) | |
182 | (define-key map "m" 'Buffer-menu-mark) | |
183 | (define-key map "\C-u" 'universal-argument) | |
184 | (define-key map "\C-p" 'previous-line) | |
185 | (define-key map "\C-n" 'next-line) | |
186 | (define-key map "p" 'previous-line) | |
187 | (define-key map "n" 'next-line) | |
188 | (define-key map "\C-v" 'scroll-up) | |
189 | (define-key map "\ev" 'scroll-down) | |
190 | (define-key map ">" 'scroll-right) | |
191 | (define-key map "<" 'scroll-left) | |
192 | (define-key map "\e\C-v" 'scroll-other-window) | |
193 | (define-key map "\e>" 'end-of-buffer) | |
194 | (define-key map "\e<" 'beginning-of-buffer) | |
195 | (setq electric-buffer-menu-mode-map map))) | |
196 | ||
197 | (defun Electric-buffer-menu-exit () | |
198 | (interactive) | |
dbc4e1c1 | 199 | (setq unread-command-events (list last-input-char)) |
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200 | ;; for robustness |
201 | (condition-case () | |
202 | (throw 'electric-buffer-menu-select nil) | |
203 | (error (Buffer-menu-mode) | |
204 | (other-buffer)))) | |
205 | ||
206 | (defun Electric-buffer-menu-select () | |
207 | "Leave Electric Buffer Menu, selecting buffers and executing changes. | |
208 | Saves buffers marked \"S\". Deletes buffers marked \"K\". | |
209 | Selects buffer at point and displays buffers marked \">\" in other windows." | |
210 | (interactive) | |
211 | (throw 'electric-buffer-menu-select (point))) | |
212 | ||
213 | (defun Electric-buffer-menu-quit () | |
214 | "Leave Electric Buffer Menu, restoring previous window configuration. | |
215 | Does not execute select, save, or delete commands." | |
216 | (interactive) | |
217 | (throw 'electric-buffer-menu-select nil)) | |
218 | ||
219 | (defun Electric-buffer-menu-undefined () | |
220 | (interactive) | |
221 | (ding) | |
222 | (message (if (and (eq (key-binding "\C-c\C-c") 'Electric-buffer-menu-quit) | |
223 | (eq (key-binding " ") 'Electric-buffer-menu-select) | |
e17d2fd1 | 224 | (eq (key-binding (char-to-string help-char)) 'Helper-help) |
2076c87c | 225 | (eq (key-binding "?") 'Helper-describe-bindings)) |
573cd924 | 226 | (substitute-command-keys "Type C-c C-c to exit, Space to select, \\[Helper-help] for help, ? for commands") |
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227 | (substitute-command-keys "\ |
228 | Type \\[Electric-buffer-menu-quit] to exit, \ | |
229 | \\[Electric-buffer-menu-select] to select, \ | |
230 | \\[Helper-help] for help, \\[Helper-describe-bindings] for commands."))) | |
231 | (sit-for 4)) | |
232 | ||
233 | (defun Electric-buffer-menu-mode-view-buffer () | |
234 | "View buffer on current line in Electric Buffer Menu. | |
235 | Returns to Electric Buffer Menu when done." | |
236 | (interactive) | |
237 | (let ((bufnam (Buffer-menu-buffer nil))) | |
238 | (if bufnam | |
239 | (view-buffer bufnam) | |
240 | (ding) | |
241 | (message "Buffer %s does not exist!" bufnam) | |
242 | (sit-for 4)))) | |
243 | ||
c0274f38 | 244 | ;;; ebuff-menu.el ends here |