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authorJim Blandy <jimb@redhat.com>1991-02-23 18:14:25 +0000
committerJim Blandy <jimb@redhat.com>1991-02-23 18:14:25 +0000
commit2cc1d71c3e9fbb9b3fcaa8d9d91cd6d7731538ea (patch)
treefb698d777592a64a9c5a1caaa3d0e84f8c5da9ce
parentaaefc6634ebbbb0143c4461fe725d356a6576c44 (diff)
downloademacs-2cc1d71c3e9fbb9b3fcaa8d9d91cd6d7731538ea.tar.gz
Initial revision
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+;; Buffer menu main function and support functions.
+;; Copyright (C) 1985, 1986, 1987 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.
+
+
+; Put buffer *Buffer List* into proper mode right away
+; so that from now on even list-buffers is enough to get a buffer menu.
+
+(defvar Buffer-menu-mode-map nil "")
+
+(if Buffer-menu-mode-map
+ ()
+ (setq Buffer-menu-mode-map (make-keymap))
+ (suppress-keymap Buffer-menu-mode-map t)
+ (define-key Buffer-menu-mode-map "q" 'Buffer-menu-select)
+ (define-key Buffer-menu-mode-map "2" 'Buffer-menu-2-window)
+ (define-key Buffer-menu-mode-map "1" 'Buffer-menu-1-window)
+ (define-key Buffer-menu-mode-map "f" 'Buffer-menu-this-window)
+ (define-key Buffer-menu-mode-map "o" 'Buffer-menu-other-window)
+ (define-key Buffer-menu-mode-map "s" 'Buffer-menu-save)
+ (define-key Buffer-menu-mode-map "d" 'Buffer-menu-delete)
+ (define-key Buffer-menu-mode-map "k" 'Buffer-menu-delete)
+ (define-key Buffer-menu-mode-map "\C-d" 'Buffer-menu-delete-backwards)
+ (define-key Buffer-menu-mode-map "\C-k" 'Buffer-menu-delete)
+ (define-key Buffer-menu-mode-map "x" 'Buffer-menu-execute)
+ (define-key Buffer-menu-mode-map " " 'next-line)
+ (define-key Buffer-menu-mode-map "n" 'next-line)
+ (define-key Buffer-menu-mode-map "p" 'previous-line)
+ (define-key Buffer-menu-mode-map "\177" 'Buffer-menu-backup-unmark)
+ (define-key Buffer-menu-mode-map "~" 'Buffer-menu-not-modified)
+ (define-key Buffer-menu-mode-map "?" 'describe-mode)
+ (define-key Buffer-menu-mode-map "u" 'Buffer-menu-unmark)
+ (define-key Buffer-menu-mode-map "m" 'Buffer-menu-mark)
+ (define-key Buffer-menu-mode-map "t" 'Buffer-menu-visit-tags-table))
+
+;; Buffer Menu mode is suitable only for specially formatted data.
+(put 'Buffer-menu-mode 'mode-class 'special)
+
+(defun 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.
+\\<Buffer-menu-mode-map>
+\\[Buffer-menu-mark] -- mark buffer to be displayed.
+\\[Buffer-menu-select] -- select buffer of line point is on.
+ Also show buffers marked with m in other windows.
+\\[Buffer-menu-1-window] -- select that buffer in full-screen window.
+\\[Buffer-menu-2-window] -- select that buffer in one window,
+ together with buffer selected before this one in another window.
+\\[Buffer-menu-this-window] -- select that buffer in place of the buffer menu buffer.
+\\[Buffer-menu-other-window] -- select that buffer in another window,
+ so the buffer menu buffer remains visible in its window.
+\\[Buffer-menu-visit-tags-table] -- visit-tags-table this buffer.
+\\[Buffer-menu-not-modified] -- clear modified-flag on that buffer.
+\\[Buffer-menu-save] -- mark that buffer to be saved, and move down.
+\\[Buffer-menu-delete] -- mark that buffer to be deleted, and move down.
+\\[Buffer-menu-delete-backwards] -- mark that buffer to be deleted, and move up.
+\\[Buffer-menu-execute] -- delete or save marked buffers.
+\\[Buffer-menu-unmark] -- remove all kinds of marks from current line.
+\\[Buffer-menu-backup-unmark] -- back up a line and remove marks."
+ (kill-all-local-variables)
+ (use-local-map Buffer-menu-mode-map)
+ (setq truncate-lines t)
+ (setq buffer-read-only t)
+ (setq major-mode 'Buffer-menu-mode)
+ (setq mode-name "Buffer Menu")
+ (run-hooks 'buffer-menu-mode-hook))
+
+(defvar Buffer-menu-buffer-column 4)
+
+(defun Buffer-menu-buffer (error-if-non-existent-p)
+ "Return buffer described by this line of buffer menu."
+ (save-excursion
+ (beginning-of-line)
+ (forward-char Buffer-menu-buffer-column)
+ (let ((start (point))
+ string)
+ ;; End of buffer name marked by tab or two spaces.
+ (re-search-forward "\t\\| ")
+ (skip-chars-backward " \t")
+ (setq string (buffer-substring start (point)))
+ (or (get-buffer string)
+ (if error-if-non-existent-p
+ (error "No buffer named \"%s\"" string)
+ nil)))))
+
+(defun buffer-menu (arg)
+ "Make a menu of buffers so you can save, delete or select them.
+With argument, show only buffers that are visiting files.
+Type ? after invocation to get help on commands available.
+Type q immediately to make the buffer menu go away."
+ (interactive "P")
+ (list-buffers arg)
+ (pop-to-buffer "*Buffer List*")
+ (forward-line 2)
+ (message
+ "Commands: d, s, x; 1, 2, m, u, q; delete; ~; ? for help."))
+
+(defun Buffer-menu-mark ()
+ "Mark buffer on this line for being displayed by \\<Buffer-menu-mode-map>\\[Buffer-menu-select] command."
+ (interactive)
+ (beginning-of-line)
+ (if (looking-at " [-M]")
+ (ding)
+ (let ((buffer-read-only nil))
+ (delete-char 1)
+ (insert ?>)
+ (forward-line 1))))
+
+(defun Buffer-menu-unmark ()
+ "Cancel all requested operations on buffer on this line."
+ (interactive)
+ (beginning-of-line)
+ (if (looking-at " [-M]")
+ (ding)
+ (let* ((buf (Buffer-menu-buffer t))
+ (mod (buffer-modified-p buf))
+ (readonly (save-excursion (set-buffer buf) buffer-read-only))
+ (buffer-read-only nil))
+ (delete-char 3)
+ (insert (if readonly (if mod " *%" " %") (if mod " * " " ")))))
+ (forward-line 1))
+
+(defun Buffer-menu-backup-unmark ()
+ "Move up and cancel all requested operations on buffer on line above."
+ (interactive)
+ (forward-line -1)
+ (Buffer-menu-unmark)
+ (forward-line -1))
+
+(defun Buffer-menu-delete ()
+ "Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command."
+ (interactive)
+ (beginning-of-line)
+ (if (looking-at " [-M]") ;header lines
+ (ding)
+ (let ((buffer-read-only nil))
+ (delete-char 1)
+ (insert ?D)
+ (forward-line 1))))
+
+(defun Buffer-menu-delete-backwards ()
+ "Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command
+and then move up one line"
+ (interactive)
+ (Buffer-menu-delete)
+ (forward-line -2)
+ (if (looking-at " [-M]") (forward-line 1)))
+
+(defun Buffer-menu-save ()
+ "Mark buffer on this line to be saved by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command."
+ (interactive)
+ (beginning-of-line)
+ (forward-char 1)
+ (if (looking-at " [-M]") ;header lines
+ (ding)
+ (let ((buffer-read-only nil))
+ (delete-char 1)
+ (insert ?S)
+ (forward-line 1))))
+
+(defun Buffer-menu-not-modified ()
+ "Mark buffer on this line as unmodified (no changes to save)."
+ (interactive)
+ (save-excursion
+ (set-buffer (Buffer-menu-buffer t))
+ (set-buffer-modified-p nil))
+ (save-excursion
+ (beginning-of-line)
+ (forward-char 1)
+ (if (looking-at "\\*")
+ (let ((buffer-read-only nil))
+ (delete-char 1)
+ (insert ? )))))
+
+(defun Buffer-menu-execute ()
+ "Save and/or delete buffers marked with \\<Buffer-menu-mode-map>\\[Buffer-menu-save] or \\<Buffer-menu-mode-map>\\[Buffer-menu-delete] commands."
+ (interactive)
+ (save-excursion
+ (goto-char (point-min))
+ (forward-line 1)
+ (while (re-search-forward "^.S" nil t)
+ (let ((modp nil))
+ (save-excursion
+ (set-buffer (Buffer-menu-buffer t))
+ (save-buffer)
+ (setq modp (buffer-modified-p)))
+ (let ((buffer-read-only nil))
+ (delete-char -1)
+ (insert (if modp ?* ? ))))))
+ (save-excursion
+ (goto-char (point-min))
+ (forward-line 1)
+ (let ((buff-menu-buffer (current-buffer))
+ (buffer-read-only nil))
+ (while (search-forward "\nD" nil t)
+ (forward-char -1)
+ (let ((buf (Buffer-menu-buffer nil)))
+ (or (eq buf nil)
+ (eq buf buff-menu-buffer)
+ (save-excursion (kill-buffer buf))))
+ (if (Buffer-menu-buffer nil)
+ (progn (delete-char 1)
+ (insert ? ))
+ (delete-region (point) (progn (forward-line 1) (point)))
+ (forward-char -1))))))
+
+(defun Buffer-menu-select ()
+ "Select this line's buffer; also display buffers marked with `>'.
+You can mark buffers with the \\<Buffer-menu-mode-map>\\[Buffer-menu-mark] command."
+ (interactive)
+ (let ((buff (Buffer-menu-buffer t))
+ (menu (current-buffer))
+ (others ())
+ tem)
+ (goto-char (point-min))
+ (while (search-forward "\n>" nil t)
+ (setq tem (Buffer-menu-buffer t))
+ (let ((buffer-read-only nil))
+ (delete-char -1)
+ (insert ?\ ))
+ (or (eq tem buff) (memq tem others) (setq others (cons tem others))))
+ (setq others (nreverse others)
+ tem (/ (1- (screen-height)) (1+ (length others))))
+ (delete-other-windows)
+ (switch-to-buffer buff)
+ (or (eq menu buff)
+ (bury-buffer menu))
+ (while others
+ (split-window nil tem)
+ (other-window 1)
+ (switch-to-buffer (car others))
+ (setq others (cdr others)))
+ (other-window 1))) ;back to the beginning!
+
+(defun Buffer-menu-visit-tags-table ()
+ "Visit the tags table in the buffer on this line. See `visit-tags-table'."
+ (interactive)
+ (let ((file (buffer-file-name (Buffer-menu-buffer t))))
+ (if file
+ (visit-tags-table file)
+ (error "Specified buffer has no file"))))
+
+(defun Buffer-menu-1-window ()
+ "Select this line's buffer, alone, in full screen."
+ (interactive)
+ (switch-to-buffer (Buffer-menu-buffer t))
+ (bury-buffer (other-buffer))
+ (delete-other-windows))
+
+(defun Buffer-menu-this-window ()
+ "Select this line's buffer in this window."
+ (interactive)
+ (switch-to-buffer (Buffer-menu-buffer t)))
+
+(defun Buffer-menu-other-window ()
+ "Select this line's buffer in other window, leaving buffer menu visible."
+ (interactive)
+ (switch-to-buffer-other-window (Buffer-menu-buffer t)))
+
+(defun Buffer-menu-2-window ()
+ "Select this line's buffer, with previous buffer in second window."
+ (interactive)
+ (let ((buff (Buffer-menu-buffer t))
+ (menu (current-buffer))
+ (pop-up-windows t))
+ (switch-to-buffer (other-buffer))
+ (pop-to-buffer buff)
+ (bury-buffer menu)))