| 1 | ;; Buffer menu main function and support functions. |
| 2 | ;; Copyright (C) 1985, 1986, 1987 Free Software Foundation, Inc. |
| 3 | |
| 4 | ;; This file is part of GNU Emacs. |
| 5 | |
| 6 | ;; GNU Emacs is free software; you can redistribute it and/or modify |
| 7 | ;; it under the terms of the GNU General Public License as published by |
| 8 | ;; the Free Software Foundation; either version 1, or (at your option) |
| 9 | ;; any later version. |
| 10 | |
| 11 | ;; GNU Emacs is distributed in the hope that it will be useful, |
| 12 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | ;; GNU General Public License for more details. |
| 15 | |
| 16 | ;; You should have received a copy of the GNU General Public License |
| 17 | ;; along with GNU Emacs; see the file COPYING. If not, write to |
| 18 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| 19 | |
| 20 | |
| 21 | ; Put buffer *Buffer List* into proper mode right away |
| 22 | ; so that from now on even list-buffers is enough to get a buffer menu. |
| 23 | |
| 24 | (defvar Buffer-menu-mode-map nil "") |
| 25 | |
| 26 | (if Buffer-menu-mode-map |
| 27 | () |
| 28 | (setq Buffer-menu-mode-map (make-keymap)) |
| 29 | (suppress-keymap Buffer-menu-mode-map t) |
| 30 | (define-key Buffer-menu-mode-map "q" 'Buffer-menu-select) |
| 31 | (define-key Buffer-menu-mode-map "2" 'Buffer-menu-2-window) |
| 32 | (define-key Buffer-menu-mode-map "1" 'Buffer-menu-1-window) |
| 33 | (define-key Buffer-menu-mode-map "f" 'Buffer-menu-this-window) |
| 34 | (define-key Buffer-menu-mode-map "o" 'Buffer-menu-other-window) |
| 35 | (define-key Buffer-menu-mode-map "s" 'Buffer-menu-save) |
| 36 | (define-key Buffer-menu-mode-map "d" 'Buffer-menu-delete) |
| 37 | (define-key Buffer-menu-mode-map "k" 'Buffer-menu-delete) |
| 38 | (define-key Buffer-menu-mode-map "\C-d" 'Buffer-menu-delete-backwards) |
| 39 | (define-key Buffer-menu-mode-map "\C-k" 'Buffer-menu-delete) |
| 40 | (define-key Buffer-menu-mode-map "x" 'Buffer-menu-execute) |
| 41 | (define-key Buffer-menu-mode-map " " 'next-line) |
| 42 | (define-key Buffer-menu-mode-map "n" 'next-line) |
| 43 | (define-key Buffer-menu-mode-map "p" 'previous-line) |
| 44 | (define-key Buffer-menu-mode-map "\177" 'Buffer-menu-backup-unmark) |
| 45 | (define-key Buffer-menu-mode-map "~" 'Buffer-menu-not-modified) |
| 46 | (define-key Buffer-menu-mode-map "?" 'describe-mode) |
| 47 | (define-key Buffer-menu-mode-map "u" 'Buffer-menu-unmark) |
| 48 | (define-key Buffer-menu-mode-map "m" 'Buffer-menu-mark) |
| 49 | (define-key Buffer-menu-mode-map "t" 'Buffer-menu-visit-tags-table)) |
| 50 | |
| 51 | ;; Buffer Menu mode is suitable only for specially formatted data. |
| 52 | (put 'Buffer-menu-mode 'mode-class 'special) |
| 53 | |
| 54 | (defun Buffer-menu-mode () |
| 55 | "Major mode for editing a list of buffers. |
| 56 | Each line describes one of the buffers in Emacs. |
| 57 | Letters do not insert themselves; instead, they are commands. |
| 58 | \\<Buffer-menu-mode-map> |
| 59 | \\[Buffer-menu-mark] -- mark buffer to be displayed. |
| 60 | \\[Buffer-menu-select] -- select buffer of line point is on. |
| 61 | Also show buffers marked with m in other windows. |
| 62 | \\[Buffer-menu-1-window] -- select that buffer in full-screen window. |
| 63 | \\[Buffer-menu-2-window] -- select that buffer in one window, |
| 64 | together with buffer selected before this one in another window. |
| 65 | \\[Buffer-menu-this-window] -- select that buffer in place of the buffer menu buffer. |
| 66 | \\[Buffer-menu-other-window] -- select that buffer in another window, |
| 67 | so the buffer menu buffer remains visible in its window. |
| 68 | \\[Buffer-menu-visit-tags-table] -- visit-tags-table this buffer. |
| 69 | \\[Buffer-menu-not-modified] -- clear modified-flag on that buffer. |
| 70 | \\[Buffer-menu-save] -- mark that buffer to be saved, and move down. |
| 71 | \\[Buffer-menu-delete] -- mark that buffer to be deleted, and move down. |
| 72 | \\[Buffer-menu-delete-backwards] -- mark that buffer to be deleted, and move up. |
| 73 | \\[Buffer-menu-execute] -- delete or save marked buffers. |
| 74 | \\[Buffer-menu-unmark] -- remove all kinds of marks from current line. |
| 75 | \\[Buffer-menu-backup-unmark] -- back up a line and remove marks." |
| 76 | (kill-all-local-variables) |
| 77 | (use-local-map Buffer-menu-mode-map) |
| 78 | (setq truncate-lines t) |
| 79 | (setq buffer-read-only t) |
| 80 | (setq major-mode 'Buffer-menu-mode) |
| 81 | (setq mode-name "Buffer Menu") |
| 82 | (run-hooks 'buffer-menu-mode-hook)) |
| 83 | \f |
| 84 | (defvar Buffer-menu-buffer-column 4) |
| 85 | |
| 86 | (defun Buffer-menu-buffer (error-if-non-existent-p) |
| 87 | "Return buffer described by this line of buffer menu." |
| 88 | (save-excursion |
| 89 | (beginning-of-line) |
| 90 | (forward-char Buffer-menu-buffer-column) |
| 91 | (let ((start (point)) |
| 92 | string) |
| 93 | ;; End of buffer name marked by tab or two spaces. |
| 94 | (re-search-forward "\t\\| ") |
| 95 | (skip-chars-backward " \t") |
| 96 | (setq string (buffer-substring start (point))) |
| 97 | (or (get-buffer string) |
| 98 | (if error-if-non-existent-p |
| 99 | (error "No buffer named \"%s\"" string) |
| 100 | nil))))) |
| 101 | \f |
| 102 | (defun buffer-menu (arg) |
| 103 | "Make a menu of buffers so you can save, delete or select them. |
| 104 | With argument, show only buffers that are visiting files. |
| 105 | Type ? after invocation to get help on commands available. |
| 106 | Type q immediately to make the buffer menu go away." |
| 107 | (interactive "P") |
| 108 | (list-buffers arg) |
| 109 | (pop-to-buffer "*Buffer List*") |
| 110 | (forward-line 2) |
| 111 | (message |
| 112 | "Commands: d, s, x; 1, 2, m, u, q; delete; ~; ? for help.")) |
| 113 | |
| 114 | (defun Buffer-menu-mark () |
| 115 | "Mark buffer on this line for being displayed by \\<Buffer-menu-mode-map>\\[Buffer-menu-select] command." |
| 116 | (interactive) |
| 117 | (beginning-of-line) |
| 118 | (if (looking-at " [-M]") |
| 119 | (ding) |
| 120 | (let ((buffer-read-only nil)) |
| 121 | (delete-char 1) |
| 122 | (insert ?>) |
| 123 | (forward-line 1)))) |
| 124 | |
| 125 | (defun Buffer-menu-unmark () |
| 126 | "Cancel all requested operations on buffer on this line." |
| 127 | (interactive) |
| 128 | (beginning-of-line) |
| 129 | (if (looking-at " [-M]") |
| 130 | (ding) |
| 131 | (let* ((buf (Buffer-menu-buffer t)) |
| 132 | (mod (buffer-modified-p buf)) |
| 133 | (readonly (save-excursion (set-buffer buf) buffer-read-only)) |
| 134 | (buffer-read-only nil)) |
| 135 | (delete-char 3) |
| 136 | (insert (if readonly (if mod " *%" " %") (if mod " * " " "))))) |
| 137 | (forward-line 1)) |
| 138 | |
| 139 | (defun Buffer-menu-backup-unmark () |
| 140 | "Move up and cancel all requested operations on buffer on line above." |
| 141 | (interactive) |
| 142 | (forward-line -1) |
| 143 | (Buffer-menu-unmark) |
| 144 | (forward-line -1)) |
| 145 | |
| 146 | (defun Buffer-menu-delete () |
| 147 | "Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command." |
| 148 | (interactive) |
| 149 | (beginning-of-line) |
| 150 | (if (looking-at " [-M]") ;header lines |
| 151 | (ding) |
| 152 | (let ((buffer-read-only nil)) |
| 153 | (delete-char 1) |
| 154 | (insert ?D) |
| 155 | (forward-line 1)))) |
| 156 | |
| 157 | (defun Buffer-menu-delete-backwards () |
| 158 | "Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command |
| 159 | and then move up one line" |
| 160 | (interactive) |
| 161 | (Buffer-menu-delete) |
| 162 | (forward-line -2) |
| 163 | (if (looking-at " [-M]") (forward-line 1))) |
| 164 | |
| 165 | (defun Buffer-menu-save () |
| 166 | "Mark buffer on this line to be saved by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command." |
| 167 | (interactive) |
| 168 | (beginning-of-line) |
| 169 | (forward-char 1) |
| 170 | (if (looking-at " [-M]") ;header lines |
| 171 | (ding) |
| 172 | (let ((buffer-read-only nil)) |
| 173 | (delete-char 1) |
| 174 | (insert ?S) |
| 175 | (forward-line 1)))) |
| 176 | |
| 177 | (defun Buffer-menu-not-modified () |
| 178 | "Mark buffer on this line as unmodified (no changes to save)." |
| 179 | (interactive) |
| 180 | (save-excursion |
| 181 | (set-buffer (Buffer-menu-buffer t)) |
| 182 | (set-buffer-modified-p nil)) |
| 183 | (save-excursion |
| 184 | (beginning-of-line) |
| 185 | (forward-char 1) |
| 186 | (if (looking-at "\\*") |
| 187 | (let ((buffer-read-only nil)) |
| 188 | (delete-char 1) |
| 189 | (insert ? ))))) |
| 190 | |
| 191 | (defun Buffer-menu-execute () |
| 192 | "Save and/or delete buffers marked with \\<Buffer-menu-mode-map>\\[Buffer-menu-save] or \\<Buffer-menu-mode-map>\\[Buffer-menu-delete] commands." |
| 193 | (interactive) |
| 194 | (save-excursion |
| 195 | (goto-char (point-min)) |
| 196 | (forward-line 1) |
| 197 | (while (re-search-forward "^.S" nil t) |
| 198 | (let ((modp nil)) |
| 199 | (save-excursion |
| 200 | (set-buffer (Buffer-menu-buffer t)) |
| 201 | (save-buffer) |
| 202 | (setq modp (buffer-modified-p))) |
| 203 | (let ((buffer-read-only nil)) |
| 204 | (delete-char -1) |
| 205 | (insert (if modp ?* ? )))))) |
| 206 | (save-excursion |
| 207 | (goto-char (point-min)) |
| 208 | (forward-line 1) |
| 209 | (let ((buff-menu-buffer (current-buffer)) |
| 210 | (buffer-read-only nil)) |
| 211 | (while (search-forward "\nD" nil t) |
| 212 | (forward-char -1) |
| 213 | (let ((buf (Buffer-menu-buffer nil))) |
| 214 | (or (eq buf nil) |
| 215 | (eq buf buff-menu-buffer) |
| 216 | (save-excursion (kill-buffer buf)))) |
| 217 | (if (Buffer-menu-buffer nil) |
| 218 | (progn (delete-char 1) |
| 219 | (insert ? )) |
| 220 | (delete-region (point) (progn (forward-line 1) (point))) |
| 221 | (forward-char -1)))))) |
| 222 | |
| 223 | (defun Buffer-menu-select () |
| 224 | "Select this line's buffer; also display buffers marked with `>'. |
| 225 | You can mark buffers with the \\<Buffer-menu-mode-map>\\[Buffer-menu-mark] command." |
| 226 | (interactive) |
| 227 | (let ((buff (Buffer-menu-buffer t)) |
| 228 | (menu (current-buffer)) |
| 229 | (others ()) |
| 230 | tem) |
| 231 | (goto-char (point-min)) |
| 232 | (while (search-forward "\n>" nil t) |
| 233 | (setq tem (Buffer-menu-buffer t)) |
| 234 | (let ((buffer-read-only nil)) |
| 235 | (delete-char -1) |
| 236 | (insert ?\ )) |
| 237 | (or (eq tem buff) (memq tem others) (setq others (cons tem others)))) |
| 238 | (setq others (nreverse others) |
| 239 | tem (/ (1- (screen-height)) (1+ (length others)))) |
| 240 | (delete-other-windows) |
| 241 | (switch-to-buffer buff) |
| 242 | (or (eq menu buff) |
| 243 | (bury-buffer menu)) |
| 244 | (while others |
| 245 | (split-window nil tem) |
| 246 | (other-window 1) |
| 247 | (switch-to-buffer (car others)) |
| 248 | (setq others (cdr others))) |
| 249 | (other-window 1))) ;back to the beginning! |
| 250 | \f |
| 251 | (defun Buffer-menu-visit-tags-table () |
| 252 | "Visit the tags table in the buffer on this line. See `visit-tags-table'." |
| 253 | (interactive) |
| 254 | (let ((file (buffer-file-name (Buffer-menu-buffer t)))) |
| 255 | (if file |
| 256 | (visit-tags-table file) |
| 257 | (error "Specified buffer has no file")))) |
| 258 | |
| 259 | (defun Buffer-menu-1-window () |
| 260 | "Select this line's buffer, alone, in full screen." |
| 261 | (interactive) |
| 262 | (switch-to-buffer (Buffer-menu-buffer t)) |
| 263 | (bury-buffer (other-buffer)) |
| 264 | (delete-other-windows)) |
| 265 | |
| 266 | (defun Buffer-menu-this-window () |
| 267 | "Select this line's buffer in this window." |
| 268 | (interactive) |
| 269 | (switch-to-buffer (Buffer-menu-buffer t))) |
| 270 | |
| 271 | (defun Buffer-menu-other-window () |
| 272 | "Select this line's buffer in other window, leaving buffer menu visible." |
| 273 | (interactive) |
| 274 | (switch-to-buffer-other-window (Buffer-menu-buffer t))) |
| 275 | |
| 276 | (defun Buffer-menu-2-window () |
| 277 | "Select this line's buffer, with previous buffer in second window." |
| 278 | (interactive) |
| 279 | (let ((buff (Buffer-menu-buffer t)) |
| 280 | (menu (current-buffer)) |
| 281 | (pop-up-windows t)) |
| 282 | (switch-to-buffer (other-buffer)) |
| 283 | (pop-to-buffer buff) |
| 284 | (bury-buffer menu))) |