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1.1 ! root 1: ;; Buffer menu main function and support functions. ! 2: ;; Copyright (C) 1985 Richard M. Stallman. ! 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: (defun Buffer-menu-mode () ! 28: "Major mode for editing a list of buffers. ! 29: Each line describes one of the buffers in Emacs. ! 30: Letters do not insert themselves; instead, they are commands. ! 31: m -- mark buffer to be displayed. ! 32: q -- select buffer of line point is on. ! 33: Also show buffers marked with m in other windows. ! 34: 1 -- select that buffer in full-screen window. ! 35: 2 -- select that buffer in one window, ! 36: together with buffer selected before this one in another window. ! 37: ~ -- clear modified-flag on that buffer. ! 38: s -- mark that buffer to be saved. ! 39: d or k or C-D or C-K -- mark that buffer to be killed. ! 40: x -- kill or save marked buffers. ! 41: u -- remove all kinds of marks from current line. ! 42: Delete -- back up a line and remove marks. ! 43: Precisely,\\{Buffer-menu-mode-map}" ! 44: (kill-all-local-variables) ! 45: (use-local-map Buffer-menu-mode-map) ! 46: (setq truncate-lines t) ! 47: (setq buffer-read-only t) ! 48: (setq major-mode 'Buffer-menu-mode) ! 49: (setq mode-name "Buffer Menu")) ! 50: ! 51: (save-excursion ! 52: (setq Buffer-menu-mode-map (make-keymap)) ! 53: (suppress-keymap Buffer-menu-mode-map t) ! 54: (define-key Buffer-menu-mode-map "q" 'Buffer-menu-select) ! 55: (define-key Buffer-menu-mode-map "2" 'Buffer-menu-2-window) ! 56: (define-key Buffer-menu-mode-map "1" 'Buffer-menu-1-window) ! 57: (define-key Buffer-menu-mode-map "s" 'Buffer-menu-save) ! 58: (define-key Buffer-menu-mode-map "d" 'Buffer-menu-kill) ! 59: (define-key Buffer-menu-mode-map "k" 'Buffer-menu-kill) ! 60: (define-key Buffer-menu-mode-map "\^d" 'Buffer-menu-kill) ! 61: (define-key Buffer-menu-mode-map "\^k" 'Buffer-menu-kill) ! 62: (define-key Buffer-menu-mode-map "x" 'Buffer-menu-execute) ! 63: (define-key Buffer-menu-mode-map " " 'next-line) ! 64: (define-key Buffer-menu-mode-map "\177" 'Buffer-menu-backup-unmark) ! 65: (define-key Buffer-menu-mode-map "~" 'Buffer-menu-not-modified) ! 66: (define-key Buffer-menu-mode-map "?" 'describe-mode) ! 67: (define-key Buffer-menu-mode-map "u" 'Buffer-menu-unmark) ! 68: (define-key Buffer-menu-mode-map "m" 'Buffer-menu-mark)) ! 69: ! 70: (defvar Buffer-menu-buffer-column nil) ! 71: ! 72: (defvar Buffer-menu-size-column nil) ! 73: ! 74: (defun Buffer-menu-buffer (error-if-non-existent-p) ! 75: "Return buffer described by this line of buffer menu." ! 76: (if (null Buffer-menu-buffer-column) ! 77: (save-excursion ! 78: (goto-char (point-min)) ! 79: (search-forward "Buffer") ! 80: (backward-word 1) ! 81: (setq Buffer-menu-buffer-column (current-column)) ! 82: (search-forward "Size") ! 83: (backward-word 1) ! 84: (setq Buffer-menu-size-column (current-column)))) ! 85: (save-excursion ! 86: (beginning-of-line) ! 87: (forward-char Buffer-menu-buffer-column) ! 88: (let ((start (point)) ! 89: string) ! 90: ;; End of buffer name marked by tab or two spaces. ! 91: (re-search-forward "\t\\| ") ! 92: (skip-chars-backward " \t") ! 93: (setq string (buffer-substring start (point))) ! 94: (or (get-buffer string) ! 95: (if error-if-non-existent-p ! 96: (error "No buffer named \"%s\"" string) ! 97: nil))))) ! 98: ! 99: (defun buffer-menu (arg) ! 100: "Make a menu of buffers so you can save, kill or select them. ! 101: With argument, show only buffers that are visiting files. ! 102: Type ? after invocation to get help on commands available within." ! 103: (interactive "P") ! 104: (list-buffers arg) ! 105: (pop-to-buffer "*Buffer List*") ! 106: (message ! 107: "Commands: d, s, x; 1, 2, m, u, q; delete; ~; ? for help.")) ! 108: ! 109: (defun Buffer-menu-mark () ! 110: "Mark buffer on this line for being displayed by \\[Buffer-menu-select] command." ! 111: (interactive) ! 112: (beginning-of-line) ! 113: (if (looking-at " [-M]") ! 114: (ding) ! 115: (let ((buffer-read-only nil)) ! 116: (delete-char 1) ! 117: (insert ?>) ! 118: (forward-line 1)))) ! 119: ! 120: (defun Buffer-menu-unmark () ! 121: "Cancel all requested operations on buffer on this line." ! 122: (interactive) ! 123: (beginning-of-line) ! 124: (if (looking-at " [-M]") ! 125: (ding) ! 126: (let* ((buf (Buffer-menu-buffer t)) ! 127: (mod (buffer-modified-p buf)) ! 128: (readonly (save-excursion (set-buffer buf) buffer-read-only)) ! 129: (buffer-read-only nil)) ! 130: (delete-char 3) ! 131: (insert (if readonly (if mod " *%" " %") (if mod " * " " "))))) ! 132: (forward-line 1)) ! 133: ! 134: (defun Buffer-menu-backup-unmark () ! 135: "Move up and cancel all requested operations on buffer on line above." ! 136: (interactive) ! 137: (forward-line -1) ! 138: (Buffer-menu-unmark) ! 139: (forward-line -1)) ! 140: ! 141: (defun Buffer-menu-kill () ! 142: "Mark buffer on this line to be killed by \\[Buffer-menu-execute] command." ! 143: (interactive) ! 144: (beginning-of-line) ! 145: (if (looking-at " [-M]") ! 146: (ding) ! 147: (let ((buffer-read-only nil)) ! 148: (delete-char 1) ! 149: (insert ?K) ! 150: (forward-line 1)))) ! 151: ! 152: (defun Buffer-menu-save () ! 153: "Mark buffer on this line to be saved by \\[Buffer-menu-execute] command." ! 154: (interactive) ! 155: (beginning-of-line) ! 156: (forward-char 1) ! 157: (if (looking-at "[-M]") ! 158: (ding) ! 159: (let ((buffer-read-only nil)) ! 160: (delete-char 1) ! 161: (insert ?S) ! 162: (forward-line 1)))) ! 163: ! 164: (defun Buffer-menu-not-modified () ! 165: "Mark buffer on this line as unmodified (no changes to save)." ! 166: (interactive) ! 167: (save-excursion ! 168: (set-buffer (Buffer-menu-buffer t)) ! 169: (set-buffer-modified-p nil)) ! 170: (save-excursion ! 171: (beginning-of-line) ! 172: (forward-char 1) ! 173: (if (looking-at "\\*") ! 174: (let ((buffer-read-only nil)) ! 175: (delete-char 1) ! 176: (insert ? ))))) ! 177: ! 178: (defun Buffer-menu-execute () ! 179: "Save and/or kill buffers marked with \\[Buffer-menu-save] or \\[Buffer-menu-kill] commands." ! 180: (interactive) ! 181: (Buffer-menu-do-saves) ! 182: (Buffer-menu-do-kills)) ! 183: ! 184: (defun Buffer-menu-do-saves () ! 185: (save-excursion ! 186: (goto-char (point-min)) ! 187: (forward-line 1) ! 188: (while (re-search-forward "^.S" nil t) ! 189: (let ((modp nil)) ! 190: (save-excursion ! 191: (set-buffer (Buffer-menu-buffer t)) ! 192: (save-buffer) ! 193: (setq modp (buffer-modified-p))) ! 194: (let ((buffer-read-only nil)) ! 195: (delete-char -1) ! 196: (insert (if modp ?* ? ))))))) ! 197: ! 198: (defun Buffer-menu-do-kills () ! 199: (save-excursion ! 200: (goto-char (point-min)) ! 201: (forward-line 1) ! 202: (let ((buff-menu-buffer (current-buffer)) ! 203: (buffer-read-only nil)) ! 204: (while (search-forward "\nK" nil t) ! 205: (forward-char -1) ! 206: (let ((buf (Buffer-menu-buffer nil))) ! 207: (or (eq buf nil) ! 208: (eq buf buff-menu-buffer) ! 209: (save-excursion (kill-buffer buf)))) ! 210: (if (Buffer-menu-buffer nil) ! 211: (progn (delete-char 1) ! 212: (insert ? )) ! 213: (delete-region (point) (progn (forward-line 1) (point))) ! 214: (forward-char -1)))))) ! 215: ! 216: (defun Buffer-menu-select () ! 217: "Select this line's buffer; also display buffers marked with >. ! 218: You can mark buffers with the \\[Buffer-menu-mark] command." ! 219: (interactive) ! 220: (let ((buff (Buffer-menu-buffer t)) ! 221: (menu (current-buffer)) ! 222: others height) ! 223: (goto-char (point-min)) ! 224: (while (search-forward "\n>" nil t) ! 225: (setq others (cons (Buffer-menu-buffer t) others)) ! 226: (let ((buffer-read-only nil)) ! 227: (delete-char -1) ! 228: (insert ?\ ))) ! 229: (setq others (nreverse others) ! 230: height (/ (1- (screen-height)) (1+ (length others)))) ! 231: (delete-other-windows) ! 232: (switch-to-buffer buff) ! 233: (or (eq menu buff) ! 234: (bury-buffer menu)) ! 235: (while others ! 236: (split-window nil height) ! 237: (other-window 1) ! 238: (switch-to-buffer (car others)) ! 239: (setq others (cdr others))) ! 240: (other-window 1))) ;back to the beginning! ! 241: ! 242: (defun Buffer-menu-1-window () ! 243: "Select this line's buffer, alone, in full screen." ! 244: (interactive) ! 245: (switch-to-buffer (Buffer-menu-buffer t)) ! 246: (bury-buffer (other-buffer)) ! 247: (delete-other-windows)) ! 248: ! 249: (defun Buffer-menu-2-window () ! 250: "Select this line's buffer, with previous buffer in second window." ! 251: (interactive) ! 252: (let ((buff (Buffer-menu-buffer t)) ! 253: (menu (current-buffer)) ! 254: (pop-up-windows t)) ! 255: (switch-to-buffer (other-buffer)) ! 256: (pop-to-buffer buff) ! 257: (bury-buffer menu)))
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