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1.1 ! root 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 distributed in the hope that it will be useful, ! 7: ;; but WITHOUT ANY WARRANTY. No author or distributor ! 8: ;; accepts responsibility to anyone for the consequences of using it ! 9: ;; or for whether it serves any particular purpose or works at all, ! 10: ;; unless he says so in writing. Refer to the GNU Emacs General Public ! 11: ;; License for full details. ! 12: ! 13: ;; Everyone is granted permission to copy, modify and redistribute ! 14: ;; GNU Emacs, but only under the conditions described in the ! 15: ;; GNU Emacs General Public License. A copy of this license is ! 16: ;; supposed to have been given to you along with GNU Emacs so you ! 17: ;; can know your rights and responsibilities. It should be in a ! 18: ;; file named COPYING. Among other things, the copyright notice ! 19: ;; and this notice must be preserved on all copies. ! 20: ! 21: ! 22: ; Put buffer *Buffer List* into proper mode right away ! 23: ; so that from now on even list-buffers is enough to get a buffer menu. ! 24: ! 25: (defvar Buffer-menu-mode-map nil "") ! 26: ! 27: (if Buffer-menu-mode-map ! 28: () ! 29: (setq Buffer-menu-mode-map (make-keymap)) ! 30: (suppress-keymap Buffer-menu-mode-map t) ! 31: (define-key Buffer-menu-mode-map "q" 'Buffer-menu-select) ! 32: (define-key Buffer-menu-mode-map "2" 'Buffer-menu-2-window) ! 33: (define-key Buffer-menu-mode-map "1" 'Buffer-menu-1-window) ! 34: (define-key Buffer-menu-mode-map "f" 'Buffer-menu-this-window) ! 35: (define-key Buffer-menu-mode-map "o" 'Buffer-menu-other-window) ! 36: (define-key Buffer-menu-mode-map "s" 'Buffer-menu-save) ! 37: (define-key Buffer-menu-mode-map "d" 'Buffer-menu-delete) ! 38: (define-key Buffer-menu-mode-map "k" 'Buffer-menu-delete) ! 39: (define-key Buffer-menu-mode-map "\C-d" 'Buffer-menu-delete-backwards) ! 40: (define-key Buffer-menu-mode-map "\C-k" 'Buffer-menu-delete) ! 41: (define-key Buffer-menu-mode-map "x" 'Buffer-menu-execute) ! 42: (define-key Buffer-menu-mode-map " " 'next-line) ! 43: (define-key Buffer-menu-mode-map "\177" 'Buffer-menu-backup-unmark) ! 44: (define-key Buffer-menu-mode-map "~" 'Buffer-menu-not-modified) ! 45: (define-key Buffer-menu-mode-map "?" 'describe-mode) ! 46: (define-key Buffer-menu-mode-map "u" 'Buffer-menu-unmark) ! 47: (define-key Buffer-menu-mode-map "m" 'Buffer-menu-mark)) ! 48: ! 49: ;; Buffer Menu mode is suitable only for specially formatted data. ! 50: (put 'Buffer-menu-mode 'mode-class 'special) ! 51: ! 52: (defun Buffer-menu-mode () ! 53: "Major mode for editing a list of buffers. ! 54: Each line describes one of the buffers in Emacs. ! 55: Letters do not insert themselves; instead, they are commands. ! 56: m -- mark buffer to be displayed. ! 57: q -- select buffer of line point is on. ! 58: Also show buffers marked with m in other windows. ! 59: 1 -- select that buffer in full-screen window. ! 60: 2 -- select that buffer in one window, ! 61: together with buffer selected before this one in another window. ! 62: f -- select that buffer in place of the buffer menu buffer. ! 63: o -- select that buffer in another window, ! 64: so the buffer menu buffer remains visible in its window. ! 65: ~ -- clear modified-flag on that buffer. ! 66: s -- mark that buffer to be saved, and move down. ! 67: d or k -- mark that buffer to be deleted, and move down. ! 68: C-d -- mark that buffer to be deleted, and move up. ! 69: x -- delete or save marked buffers. ! 70: u -- remove all kinds of marks from current line. ! 71: Delete -- back up a line and remove marks. ! 72: ! 73: Precisely,\\{Buffer-menu-mode-map}" ! 74: (kill-all-local-variables) ! 75: (use-local-map Buffer-menu-mode-map) ! 76: (setq truncate-lines t) ! 77: (setq buffer-read-only t) ! 78: (setq major-mode 'Buffer-menu-mode) ! 79: (setq mode-name "Buffer Menu") ! 80: (run-hooks 'buffer-menu-mode-hook)) ! 81: ! 82: (defvar Buffer-menu-buffer-column nil) ! 83: ! 84: (defvar Buffer-menu-size-column nil) ! 85: ! 86: (defun Buffer-menu-buffer (error-if-non-existent-p) ! 87: "Return buffer described by this line of buffer menu." ! 88: (if (null Buffer-menu-buffer-column) ! 89: (save-excursion ! 90: (goto-char (point-min)) ! 91: (search-forward "Buffer") ! 92: (backward-word 1) ! 93: (setq Buffer-menu-buffer-column (current-column)) ! 94: (search-forward "Size") ! 95: (backward-word 1) ! 96: (setq Buffer-menu-size-column (current-column)))) ! 97: (save-excursion ! 98: (beginning-of-line) ! 99: (forward-char Buffer-menu-buffer-column) ! 100: (let ((start (point)) ! 101: string) ! 102: ;; End of buffer name marked by tab or two spaces. ! 103: (re-search-forward "\t\\| ") ! 104: (skip-chars-backward " \t") ! 105: (setq string (buffer-substring start (point))) ! 106: (or (get-buffer string) ! 107: (if error-if-non-existent-p ! 108: (error "No buffer named \"%s\"" string) ! 109: nil))))) ! 110: ! 111: (defun buffer-menu (arg) ! 112: "Make a menu of buffers so you can save, delete or select them. ! 113: With argument, show only buffers that are visiting files. ! 114: Type ? after invocation to get help on commands available. ! 115: Type q immediately to make the buffer menu go away." ! 116: (interactive "P") ! 117: (list-buffers arg) ! 118: (pop-to-buffer "*Buffer List*") ! 119: (forward-line 2) ! 120: (message ! 121: "Commands: d, s, x; 1, 2, m, u, q; delete; ~; ? for help.")) ! 122: ! 123: (defun Buffer-menu-mark () ! 124: "Mark buffer on this line for being displayed by \\[Buffer-menu-select] command." ! 125: (interactive) ! 126: (beginning-of-line) ! 127: (if (looking-at " [-M]") ! 128: (ding) ! 129: (let ((buffer-read-only nil)) ! 130: (delete-char 1) ! 131: (insert ?>) ! 132: (forward-line 1)))) ! 133: ! 134: (defun Buffer-menu-unmark () ! 135: "Cancel all requested operations on buffer on this line." ! 136: (interactive) ! 137: (beginning-of-line) ! 138: (if (looking-at " [-M]") ! 139: (ding) ! 140: (let* ((buf (Buffer-menu-buffer t)) ! 141: (mod (buffer-modified-p buf)) ! 142: (readonly (save-excursion (set-buffer buf) buffer-read-only)) ! 143: (buffer-read-only nil)) ! 144: (delete-char 3) ! 145: (insert (if readonly (if mod " *%" " %") (if mod " * " " "))))) ! 146: (forward-line 1)) ! 147: ! 148: (defun Buffer-menu-backup-unmark () ! 149: "Move up and cancel all requested operations on buffer on line above." ! 150: (interactive) ! 151: (forward-line -1) ! 152: (Buffer-menu-unmark) ! 153: (forward-line -1)) ! 154: ! 155: (defun Buffer-menu-delete () ! 156: "Mark buffer on this line to be deleted by \\[Buffer-menu-execute] command." ! 157: (interactive) ! 158: (beginning-of-line) ! 159: (if (looking-at " [-M]") ;header lines ! 160: (ding) ! 161: (let ((buffer-read-only nil)) ! 162: (delete-char 1) ! 163: (insert ?D) ! 164: (forward-line 1)))) ! 165: ! 166: (defun Buffer-menu-delete-backwards () ! 167: "Mark buffer on this line to be deleted by \\[Buffer-menu-execute] command ! 168: and then move up one line" ! 169: (interactive) ! 170: (Buffer-menu-delete) ! 171: (forward-line -2) ! 172: (if (looking-at " [-M]") (forward-line 1))) ! 173: ! 174: (defun Buffer-menu-save () ! 175: "Mark buffer on this line to be saved by \\[Buffer-menu-execute] command." ! 176: (interactive) ! 177: (beginning-of-line) ! 178: (forward-char 1) ! 179: (if (looking-at " [-M]") ;header lines ! 180: (ding) ! 181: (let ((buffer-read-only nil)) ! 182: (delete-char 1) ! 183: (insert ?S) ! 184: (forward-line 1)))) ! 185: ! 186: (defun Buffer-menu-not-modified () ! 187: "Mark buffer on this line as unmodified (no changes to save)." ! 188: (interactive) ! 189: (save-excursion ! 190: (set-buffer (Buffer-menu-buffer t)) ! 191: (set-buffer-modified-p nil)) ! 192: (save-excursion ! 193: (beginning-of-line) ! 194: (forward-char 1) ! 195: (if (looking-at "\\*") ! 196: (let ((buffer-read-only nil)) ! 197: (delete-char 1) ! 198: (insert ? ))))) ! 199: ! 200: (defun Buffer-menu-execute () ! 201: "Save and/or delete buffers marked with \\[Buffer-menu-save] or \\[Buffer-menu-delete] commands." ! 202: (interactive) ! 203: (save-excursion ! 204: (goto-char (point-min)) ! 205: (forward-line 1) ! 206: (while (re-search-forward "^.S" nil t) ! 207: (let ((modp nil)) ! 208: (save-excursion ! 209: (set-buffer (Buffer-menu-buffer t)) ! 210: (save-buffer) ! 211: (setq modp (buffer-modified-p))) ! 212: (let ((buffer-read-only nil)) ! 213: (delete-char -1) ! 214: (insert (if modp ?* ? )))))) ! 215: (save-excursion ! 216: (goto-char (point-min)) ! 217: (forward-line 1) ! 218: (let ((buff-menu-buffer (current-buffer)) ! 219: (buffer-read-only nil)) ! 220: (while (search-forward "\nD" nil t) ! 221: (forward-char -1) ! 222: (let ((buf (Buffer-menu-buffer nil))) ! 223: (or (eq buf nil) ! 224: (eq buf buff-menu-buffer) ! 225: (save-excursion (kill-buffer buf)))) ! 226: (if (Buffer-menu-buffer nil) ! 227: (progn (delete-char 1) ! 228: (insert ? )) ! 229: (delete-region (point) (progn (forward-line 1) (point))) ! 230: (forward-char -1)))))) ! 231: ! 232: (defun Buffer-menu-select () ! 233: "Select this line's buffer; also display buffers marked with \">\". ! 234: You can mark buffers with the \\[Buffer-menu-mark] command." ! 235: (interactive) ! 236: (let ((buff (Buffer-menu-buffer t)) ! 237: (menu (current-buffer)) ! 238: (others ()) ! 239: tem) ! 240: (goto-char (point-min)) ! 241: (while (search-forward "\n>" nil t) ! 242: (setq tem (Buffer-menu-buffer t)) ! 243: (let ((buffer-read-only nil)) ! 244: (delete-char -1) ! 245: (insert ?\ )) ! 246: (or (eq tem buff) (memq tem others) (setq others (cons tem others)))) ! 247: (setq others (nreverse others) ! 248: tem (/ (1- (screen-height)) (1+ (length others)))) ! 249: (delete-other-windows) ! 250: (switch-to-buffer buff) ! 251: (or (eq menu buff) ! 252: (bury-buffer menu)) ! 253: (while others ! 254: (split-window nil tem) ! 255: (other-window 1) ! 256: (switch-to-buffer (car others)) ! 257: (setq others (cdr others))) ! 258: (other-window 1))) ;back to the beginning! ! 259: ! 260: (defun Buffer-menu-1-window () ! 261: "Select this line's buffer, alone, in full screen." ! 262: (interactive) ! 263: (switch-to-buffer (Buffer-menu-buffer t)) ! 264: (bury-buffer (other-buffer)) ! 265: (delete-other-windows)) ! 266: ! 267: (defun Buffer-menu-this-window () ! 268: "Select this line's buffer in this window." ! 269: (interactive) ! 270: (switch-to-buffer (Buffer-menu-buffer t))) ! 271: ! 272: (defun Buffer-menu-other-window () ! 273: "Select this line's buffer in other window, leaving buffer menu visible." ! 274: (interactive) ! 275: (switch-to-buffer-other-window (Buffer-menu-buffer t))) ! 276: ! 277: (defun Buffer-menu-2-window () ! 278: "Select this line's buffer, with previous buffer in second window." ! 279: (interactive) ! 280: (let ((buff (Buffer-menu-buffer t)) ! 281: (menu (current-buffer)) ! 282: (pop-up-windows t)) ! 283: (switch-to-buffer (other-buffer)) ! 284: (pop-to-buffer buff) ! 285: (bury-buffer menu)))
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