| 1 | ;;; ebuff-menu.el --- electric-buffer-list mode |
| 2 | |
| 3 | ;; Copyright (C) 1985, 1986, 1994 Free Software Foundation, Inc. |
| 4 | |
| 5 | ;; Author: Richard Mlynarik <mly@ai.mit.edu> |
| 6 | ;; Maintainer: FSF |
| 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 2, 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 the |
| 22 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 23 | ;; Boston, MA 02111-1307, USA. |
| 24 | |
| 25 | ;;; Commentary: |
| 26 | |
| 27 | ;; Who says one can't have typeout windows in GNU Emacs? The entry |
| 28 | ;; point, `electric-buffer-list' works like ^r select buffer from the |
| 29 | ;; ITS Emacs lunar or tmacs libraries. |
| 30 | |
| 31 | ;;; Code: |
| 32 | |
| 33 | (require 'electric) |
| 34 | |
| 35 | ;; this depends on the format of list-buffers (from src/buffer.c) and |
| 36 | ;; on stuff in lisp/buff-menu.el |
| 37 | |
| 38 | (defvar electric-buffer-menu-mode-map nil) |
| 39 | |
| 40 | ;;;###autoload |
| 41 | (defun electric-buffer-list (arg) |
| 42 | "Pops up a buffer describing the set of Emacs buffers. |
| 43 | Vaguely like ITS lunar select buffer; combining typeoutoid buffer |
| 44 | listing with menuoid buffer selection. |
| 45 | |
| 46 | If the very next character typed is a space then the buffer list |
| 47 | window disappears. Otherwise, one may move around in the buffer list |
| 48 | window, marking buffers to be selected, saved or deleted. |
| 49 | |
| 50 | To exit and select a new buffer, type a space when the cursor is on |
| 51 | the appropriate line of the buffer-list window. Other commands are |
| 52 | much like those of buffer-menu-mode. |
| 53 | |
| 54 | Calls value of `electric-buffer-menu-mode-hook' on entry if non-nil. |
| 55 | |
| 56 | \\{electric-buffer-menu-mode-map}" |
| 57 | (interactive "P") |
| 58 | (let (select buffer) |
| 59 | (save-window-excursion |
| 60 | (save-window-excursion (list-buffers arg)) |
| 61 | (setq buffer (window-buffer (Electric-pop-up-window "*Buffer List*"))) |
| 62 | (unwind-protect |
| 63 | (progn |
| 64 | (set-buffer buffer) |
| 65 | (Electric-buffer-menu-mode) |
| 66 | (setq select |
| 67 | (catch 'electric-buffer-menu-select |
| 68 | (message "<<< Press Return to bury the buffer list >>>") |
| 69 | (if (eq (setq unread-command-events (list (read-event))) |
| 70 | ?\ ) |
| 71 | (progn (setq unread-command-events nil) |
| 72 | (throw 'electric-buffer-menu-select nil))) |
| 73 | (let ((start-point (point)) |
| 74 | (first (progn (goto-char (point-min)) |
| 75 | (forward-line 2) |
| 76 | (point))) |
| 77 | (last (progn (goto-char (point-max)) |
| 78 | (forward-line -1) |
| 79 | (point))) |
| 80 | (goal-column 0)) |
| 81 | ;; Use start-point if it is meaningful. |
| 82 | (goto-char (if (or (< start-point first) |
| 83 | (> start-point last)) |
| 84 | first |
| 85 | start-point)) |
| 86 | (Electric-command-loop 'electric-buffer-menu-select |
| 87 | nil |
| 88 | t |
| 89 | 'electric-buffer-menu-looper |
| 90 | (cons first last)))))) |
| 91 | (set-buffer buffer) |
| 92 | (Buffer-menu-mode) |
| 93 | (bury-buffer buffer) |
| 94 | (message ""))) |
| 95 | (if select |
| 96 | (progn (set-buffer buffer) |
| 97 | (let ((opoint (point-marker))) |
| 98 | (Buffer-menu-execute) |
| 99 | (goto-char (point-min)) |
| 100 | (if (prog1 (search-forward "\n>" nil t) |
| 101 | (goto-char opoint) (set-marker opoint nil)) |
| 102 | (Buffer-menu-select) |
| 103 | (switch-to-buffer (Buffer-menu-buffer t)))))))) |
| 104 | |
| 105 | (defun electric-buffer-menu-looper (state condition) |
| 106 | (cond ((and condition |
| 107 | (not (memq (car condition) '(buffer-read-only |
| 108 | end-of-buffer |
| 109 | beginning-of-buffer)))) |
| 110 | (signal (car condition) (cdr condition))) |
| 111 | ((< (point) (car state)) |
| 112 | (goto-char (point-min)) |
| 113 | (forward-line 2)) |
| 114 | ((> (point) (cdr state)) |
| 115 | (goto-char (point-max)) |
| 116 | (forward-line -1) |
| 117 | (if (pos-visible-in-window-p (point-max)) |
| 118 | (recenter -1))))) |
| 119 | |
| 120 | (put 'Electric-buffer-menu-mode 'mode-class 'special) |
| 121 | (defun Electric-buffer-menu-mode () |
| 122 | "Major mode for editing a list of buffers. |
| 123 | Each line describes one of the buffers in Emacs. |
| 124 | Letters do not insert themselves; instead, they are commands. |
| 125 | \\<electric-buffer-menu-mode-map> |
| 126 | \\[keyboard-quit] or \\[Electric-buffer-menu-quit] -- exit buffer menu, returning to previous window and buffer |
| 127 | configuration. If the very first character typed is a space, it |
| 128 | also has this effect. |
| 129 | \\[Electric-buffer-menu-select] -- select buffer of line point is on. |
| 130 | Also show buffers marked with m in other windows, |
| 131 | deletes buffers marked with \"D\", and saves those marked with \"S\". |
| 132 | \\[Buffer-menu-mark] -- mark buffer to be displayed. |
| 133 | \\[Buffer-menu-not-modified] -- clear modified-flag on that buffer. |
| 134 | \\[Buffer-menu-save] -- mark that buffer to be saved. |
| 135 | \\[Buffer-menu-delete] or \\[Buffer-menu-delete-backwards] -- mark that buffer to be deleted. |
| 136 | \\[Buffer-menu-unmark] -- remove all kinds of marks from current line. |
| 137 | \\[Electric-buffer-menu-mode-view-buffer] -- view buffer, returning when done. |
| 138 | \\[Buffer-menu-backup-unmark] -- back up a line and remove marks. |
| 139 | |
| 140 | \\{electric-buffer-menu-mode-map} |
| 141 | |
| 142 | Entry to this mode via command electric-buffer-list calls the value of |
| 143 | electric-buffer-menu-mode-hook if it is non-nil." |
| 144 | (kill-all-local-variables) |
| 145 | (use-local-map electric-buffer-menu-mode-map) |
| 146 | (setq mode-name "Electric Buffer Menu") |
| 147 | (setq mode-line-buffer-identification "Electric Buffer List") |
| 148 | (make-local-variable 'Helper-return-blurb) |
| 149 | (setq Helper-return-blurb "return to buffer editing") |
| 150 | (setq truncate-lines t) |
| 151 | (setq buffer-read-only t) |
| 152 | (setq major-mode 'Electric-buffer-menu-mode) |
| 153 | (goto-char (point-min)) |
| 154 | (if (search-forward "\n." nil t) (forward-char -1)) |
| 155 | (run-hooks 'electric-buffer-menu-mode-hook)) |
| 156 | |
| 157 | ;; generally the same as Buffer-menu-mode-map |
| 158 | ;; (except we don't indirect to global-map) |
| 159 | (put 'Electric-buffer-menu-undefined 'suppress-keymap t) |
| 160 | (if electric-buffer-menu-mode-map |
| 161 | nil |
| 162 | (let ((map (make-keymap))) |
| 163 | (fillarray (car (cdr map)) 'Electric-buffer-menu-undefined) |
| 164 | (define-key map "\e" nil) |
| 165 | (define-key map "\C-z" 'suspend-emacs) |
| 166 | (define-key map "v" 'Electric-buffer-menu-mode-view-buffer) |
| 167 | (define-key map (char-to-string help-char) 'Helper-help) |
| 168 | (define-key map "?" 'Helper-describe-bindings) |
| 169 | (define-key map "\C-c" nil) |
| 170 | (define-key map "\C-c\C-c" 'Electric-buffer-menu-quit) |
| 171 | (define-key map "\C-]" 'Electric-buffer-menu-quit) |
| 172 | (define-key map "q" 'Electric-buffer-menu-quit) |
| 173 | (define-key map " " 'Electric-buffer-menu-select) |
| 174 | (define-key map "\C-m" 'Electric-buffer-menu-select) |
| 175 | (define-key map "\C-l" 'recenter) |
| 176 | (define-key map "s" 'Buffer-menu-save) |
| 177 | (define-key map "d" 'Buffer-menu-delete) |
| 178 | (define-key map "k" 'Buffer-menu-delete) |
| 179 | (define-key map "\C-d" 'Buffer-menu-delete-backwards) |
| 180 | ;(define-key map "\C-k" 'Buffer-menu-delete) |
| 181 | (define-key map "\177" 'Buffer-menu-backup-unmark) |
| 182 | (define-key map "~" 'Buffer-menu-not-modified) |
| 183 | (define-key map "u" 'Buffer-menu-unmark) |
| 184 | (let ((i ?0)) |
| 185 | (while (<= i ?9) |
| 186 | (define-key map (char-to-string i) 'digit-argument) |
| 187 | (define-key map (concat "\e" (char-to-string i)) 'digit-argument) |
| 188 | (setq i (1+ i)))) |
| 189 | (define-key map "-" 'negative-argument) |
| 190 | (define-key map "\e-" 'negative-argument) |
| 191 | (define-key map "m" 'Buffer-menu-mark) |
| 192 | (define-key map "\C-u" 'universal-argument) |
| 193 | (define-key map "\C-p" 'previous-line) |
| 194 | (define-key map "\C-n" 'next-line) |
| 195 | (define-key map "p" 'previous-line) |
| 196 | (define-key map "n" 'next-line) |
| 197 | (define-key map "\C-v" 'scroll-up) |
| 198 | (define-key map "\ev" 'scroll-down) |
| 199 | (define-key map ">" 'scroll-right) |
| 200 | (define-key map "<" 'scroll-left) |
| 201 | (define-key map "\e\C-v" 'scroll-other-window) |
| 202 | (define-key map "\e>" 'end-of-buffer) |
| 203 | (define-key map "\e<" 'beginning-of-buffer) |
| 204 | (define-key map "\e\e" nil) |
| 205 | (define-key map "\e\e\e" 'Electric-buffer-menu-quit) |
| 206 | (define-key map [escape escape escape] 'Electric-buffer-menu-quit) |
| 207 | (define-key map [mouse-2] 'Electric-buffer-menu-mouse-select) |
| 208 | (setq electric-buffer-menu-mode-map map))) |
| 209 | |
| 210 | (defun Electric-buffer-menu-exit () |
| 211 | (interactive) |
| 212 | (setq unread-command-events (listify-key-sequence (this-command-keys))) |
| 213 | ;; for robustness |
| 214 | (condition-case () |
| 215 | (throw 'electric-buffer-menu-select nil) |
| 216 | (error (Buffer-menu-mode) |
| 217 | (other-buffer)))) |
| 218 | |
| 219 | (defun Electric-buffer-menu-select () |
| 220 | "Leave Electric Buffer Menu, selecting buffers and executing changes. |
| 221 | Saves buffers marked \"S\". Deletes buffers marked \"K\". |
| 222 | Selects buffer at point and displays buffers marked \">\" in other windows." |
| 223 | (interactive) |
| 224 | (throw 'electric-buffer-menu-select (point))) |
| 225 | |
| 226 | (defun Electric-buffer-menu-mouse-select (event) |
| 227 | (interactive "e") |
| 228 | (select-window (posn-window (event-end event))) |
| 229 | (set-buffer (window-buffer (selected-window))) |
| 230 | (goto-char (posn-point (event-end event))) |
| 231 | (throw 'electric-buffer-menu-select (point))) |
| 232 | |
| 233 | (defun Electric-buffer-menu-quit () |
| 234 | "Leave Electric Buffer Menu, restoring previous window configuration. |
| 235 | Does not execute select, save, or delete commands." |
| 236 | (interactive) |
| 237 | (throw 'electric-buffer-menu-select nil)) |
| 238 | |
| 239 | (defun Electric-buffer-menu-undefined () |
| 240 | (interactive) |
| 241 | (ding) |
| 242 | (message "%s" |
| 243 | (if (and (eq (key-binding "\C-c\C-c") 'Electric-buffer-menu-quit) |
| 244 | (eq (key-binding " ") 'Electric-buffer-menu-select) |
| 245 | (eq (key-binding (char-to-string help-char)) 'Helper-help) |
| 246 | (eq (key-binding "?") 'Helper-describe-bindings)) |
| 247 | (substitute-command-keys "Type C-c C-c to exit, Space to select, \\[Helper-help] for help, ? for commands") |
| 248 | (substitute-command-keys "\ |
| 249 | Type \\[Electric-buffer-menu-quit] to exit, \ |
| 250 | \\[Electric-buffer-menu-select] to select, \ |
| 251 | \\[Helper-help] for help, \\[Helper-describe-bindings] for commands."))) |
| 252 | (sit-for 4)) |
| 253 | |
| 254 | (defun Electric-buffer-menu-mode-view-buffer () |
| 255 | "View buffer on current line in Electric Buffer Menu. |
| 256 | Returns to Electric Buffer Menu when done." |
| 257 | (interactive) |
| 258 | (let ((bufnam (Buffer-menu-buffer nil))) |
| 259 | (if bufnam |
| 260 | (view-buffer bufnam) |
| 261 | (ding) |
| 262 | (message "Buffer %s does not exist!" bufnam) |
| 263 | (sit-for 4)))) |
| 264 | |
| 265 | (provide 'ebuff-menu) |
| 266 | |
| 267 | ;;; ebuff-menu.el ends here |