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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 distributed in the hope that it will be useful,
- ;; but WITHOUT ANY WARRANTY. No author or distributor
- ;; accepts responsibility to anyone for the consequences of using it
- ;; or for whether it serves any particular purpose or works at all,
- ;; unless he says so in writing. Refer to the GNU Emacs General Public
- ;; License for full details.
- ;; Everyone is granted permission to copy, modify and redistribute
- ;; GNU Emacs, but only under the conditions described in the
- ;; GNU Emacs General Public License. A copy of this license is
- ;; supposed to have been given to you along with GNU Emacs so you
- ;; can know your rights and responsibilities. It should be in a
- ;; file named COPYING. Among other things, the copyright notice
- ;; and this notice must be preserved on all copies.
- ; 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 "\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))
- ;; 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.
- m -- mark buffer to be displayed.
- q -- select buffer of line point is on.
- Also show buffers marked with m in other windows.
- 1 -- select that buffer in full-screen window.
- 2 -- select that buffer in one window,
- together with buffer selected before this one in another window.
- f -- select that buffer in place of the buffer menu buffer.
- o -- select that buffer in another window,
- so the buffer menu buffer remains visible in its window.
- ~ -- clear modified-flag on that buffer.
- s -- mark that buffer to be saved, and move down.
- d or k -- mark that buffer to be deleted, and move down.
- C-d -- mark that buffer to be deleted, and move up.
- x -- delete or save marked buffers.
- u -- remove all kinds of marks from current line.
- Delete -- back up a line and remove marks.
- Precisely,\\{Buffer-menu-mode-map}"
- (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"))
- (defvar Buffer-menu-buffer-column nil)
- (defvar Buffer-menu-size-column nil)
- (defun Buffer-menu-buffer (error-if-non-existent-p)
- "Return buffer described by this line of buffer menu."
- (if (null Buffer-menu-buffer-column)
- (save-excursion
- (goto-char (point-min))
- (search-forward "Buffer")
- (backward-word 1)
- (setq Buffer-menu-buffer-column (current-column))
- (search-forward "Size")
- (backward-word 1)
- (setq Buffer-menu-size-column (current-column))))
- (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-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-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-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-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-save] or \\[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-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-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)))
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