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