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544 lines
19 KiB
EmacsLisp
544 lines
19 KiB
EmacsLisp
;;; buff-menu.el --- buffer menu main function and support functions.
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;; Copyright (C) 1985, 86, 87, 93, 94, 95 Free Software Foundation, Inc.
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;; Maintainer: FSF
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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;;; Commentary:
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;; Edit, delete, or change attributes of all currently active Emacs
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;; buffers from a list summarizing their state. A good way to browse
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;; any special or scratch buffers you have loaded, since you can't find
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;; them by filename. The single entry point is `Buffer-menu-mode',
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;; normally bound to C-x C-b.
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;;; Change Log:
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;; Merged by esr with recent mods to Emacs 19 buff-menu, 23 Mar 1993
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;;
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;; Modified by Bob Weiner, Motorola, Inc., 4/14/89
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;;
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;; Added optional backup argument to 'Buffer-menu-unmark' to make it undelete
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;; current entry and then move to previous one.
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;;
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;; Based on FSF code dating back to 1985.
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;;; Code:
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;;;Trying to preserve the old window configuration works well in
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;;;simple scenarios, when you enter the buffer menu, use it, and exit it.
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;;;But it does strange things when you switch back to the buffer list buffer
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;;;with C-x b, later on, when the window configuration is different.
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;;;The choice seems to be, either restore the window configuration
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;;;in all cases, or in no cases.
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;;;I decided it was better not to restore the window config at all. -- rms.
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;;;But since then, I changed buffer-menu to use the selected window,
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;;;so q now once again goes back to the previous window configuration.
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;;;(defvar Buffer-menu-window-config nil
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;;; "Window configuration saved from entry to `buffer-menu'.")
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; Put buffer *Buffer List* into proper mode right away
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; so that from now on even list-buffers is enough to get a buffer menu.
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(defvar Buffer-menu-buffer-column nil)
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(defvar Buffer-menu-mode-map nil "")
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(if Buffer-menu-mode-map
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()
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(setq Buffer-menu-mode-map (make-keymap))
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(suppress-keymap Buffer-menu-mode-map t)
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(define-key Buffer-menu-mode-map "q" 'Buffer-menu-quit)
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(define-key Buffer-menu-mode-map "v" 'Buffer-menu-select)
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(define-key Buffer-menu-mode-map "2" 'Buffer-menu-2-window)
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(define-key Buffer-menu-mode-map "1" 'Buffer-menu-1-window)
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(define-key Buffer-menu-mode-map "f" 'Buffer-menu-this-window)
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(define-key Buffer-menu-mode-map "\C-m" 'Buffer-menu-this-window)
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(define-key Buffer-menu-mode-map "o" 'Buffer-menu-other-window)
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(define-key Buffer-menu-mode-map "\C-o" 'Buffer-menu-switch-other-window)
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(define-key Buffer-menu-mode-map "s" 'Buffer-menu-save)
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(define-key Buffer-menu-mode-map "d" 'Buffer-menu-delete)
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(define-key Buffer-menu-mode-map "k" 'Buffer-menu-delete)
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(define-key Buffer-menu-mode-map "\C-d" 'Buffer-menu-delete-backwards)
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(define-key Buffer-menu-mode-map "\C-k" 'Buffer-menu-delete)
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(define-key Buffer-menu-mode-map "x" 'Buffer-menu-execute)
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(define-key Buffer-menu-mode-map " " 'next-line)
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(define-key Buffer-menu-mode-map "n" 'next-line)
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(define-key Buffer-menu-mode-map "p" 'previous-line)
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(define-key Buffer-menu-mode-map "\177" 'Buffer-menu-backup-unmark)
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(define-key Buffer-menu-mode-map "~" 'Buffer-menu-not-modified)
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(define-key Buffer-menu-mode-map "?" 'describe-mode)
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(define-key Buffer-menu-mode-map "u" 'Buffer-menu-unmark)
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(define-key Buffer-menu-mode-map "m" 'Buffer-menu-mark)
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(define-key Buffer-menu-mode-map "t" 'Buffer-menu-visit-tags-table)
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(define-key Buffer-menu-mode-map "%" 'Buffer-menu-toggle-read-only)
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(define-key Buffer-menu-mode-map "g" 'revert-buffer)
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(define-key Buffer-menu-mode-map [mouse-2] 'Buffer-menu-mouse-select)
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)
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;; Buffer Menu mode is suitable only for specially formatted data.
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(put 'Buffer-menu-mode 'mode-class 'special)
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(defun Buffer-menu-mode ()
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"Major mode for editing a list of buffers.
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Each line describes one of the buffers in Emacs.
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Letters do not insert themselves; instead, they are commands.
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\\<Buffer-menu-mode-map>
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\\[Buffer-menu-mouse-select] -- select buffer you click on, in place of the buffer menu.
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\\[Buffer-menu-this-window] -- select current line's buffer in place of the buffer menu.
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\\[Buffer-menu-other-window] -- select that buffer in another window,
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so the buffer menu buffer remains visible in its window.
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\\[Buffer-menu-switch-other-window] -- make another window display that buffer.
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\\[Buffer-menu-mark] -- mark current line's buffer to be displayed.
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\\[Buffer-menu-select] -- select current line's buffer.
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Also show buffers marked with m, in other windows.
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\\[Buffer-menu-1-window] -- select that buffer in full-frame window.
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\\[Buffer-menu-2-window] -- select that buffer in one window,
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together with buffer selected before this one in another window.
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\\[Buffer-menu-visit-tags-table] -- visit-tags-table this buffer.
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\\[Buffer-menu-not-modified] -- clear modified-flag on that buffer.
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\\[Buffer-menu-save] -- mark that buffer to be saved, and move down.
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\\[Buffer-menu-delete] -- mark that buffer to be deleted, and move down.
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\\[Buffer-menu-delete-backwards] -- mark that buffer to be deleted, and move up.
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\\[Buffer-menu-execute] -- delete or save marked buffers.
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\\[Buffer-menu-unmark] -- remove all kinds of marks from current line.
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With prefix argument, also move up one line.
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\\[Buffer-menu-backup-unmark] -- back up a line and remove marks.
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\\[Buffer-menu-toggle-read-only] -- toggle read-only status of buffer on this line."
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(kill-all-local-variables)
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(use-local-map Buffer-menu-mode-map)
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(setq major-mode 'Buffer-menu-mode)
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(setq mode-name "Buffer Menu")
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(make-local-variable 'revert-buffer-function)
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(setq revert-buffer-function 'Buffer-menu-revert-function)
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(setq truncate-lines t)
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(setq buffer-read-only t)
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(run-hooks 'buffer-menu-mode-hook))
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(defun Buffer-menu-revert-function (ignore1 ignore2)
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(list-buffers))
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(defun Buffer-menu-buffer (error-if-non-existent-p)
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"Return buffer described by this line of buffer menu."
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(let* ((where (save-excursion
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(beginning-of-line)
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(+ (point) Buffer-menu-buffer-column)))
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(name (and (not (eobp)) (get-text-property where 'buffer-name))))
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(if name
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(or (get-buffer name)
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(if error-if-non-existent-p
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(error "No buffer named `%s'" name)
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nil))
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(if error-if-non-existent-p
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(error "No buffer on this line")
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nil))))
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(defun buffer-menu (&optional arg)
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"Make a menu of buffers so you can save, delete or select them.
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With argument, show only buffers that are visiting files.
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Type ? after invocation to get help on commands available.
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Type q immediately to make the buffer menu go away."
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(interactive "P")
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;;; (setq Buffer-menu-window-config (current-window-configuration))
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(switch-to-buffer (list-buffers-noselect arg))
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(message
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"Commands: d, s, x, u; f, o, 1, 2, m, v; ~, %%; q to quit; ? for help."))
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(defun buffer-menu-other-window (&optional arg)
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"Display a list of buffers in another window.
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With the buffer list buffer, you can save, delete or select the buffers.
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With argument, show only buffers that are visiting files.
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Type ? after invocation to get help on commands available.
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Type q immediately to make the buffer menu go away."
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(interactive "P")
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;;; (setq Buffer-menu-window-config (current-window-configuration))
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(switch-to-buffer-other-window (list-buffers-noselect arg))
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(message
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"Commands: d, s, x, u; f, o, 1, 2, m, v; ~, %%; q to quit; ? for help."))
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(defun Buffer-menu-quit ()
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"Quit the buffer menu."
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(interactive)
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(let ((buffer (current-buffer)))
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;; Switch away from the buffer menu and bury it.
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(switch-to-buffer (other-buffer))
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(bury-buffer buffer)))
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(defun Buffer-menu-mark ()
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"Mark buffer on this line for being displayed by \\<Buffer-menu-mode-map>\\[Buffer-menu-select] command."
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(interactive)
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(beginning-of-line)
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(if (looking-at " [-M]")
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(ding)
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(let ((buffer-read-only nil))
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(delete-char 1)
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(insert ?>)
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(forward-line 1))))
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(defun Buffer-menu-unmark (&optional backup)
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"Cancel all requested operations on buffer on this line and move down.
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Optional ARG means move up."
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(interactive "P")
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(beginning-of-line)
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(if (looking-at " [-M]")
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(ding)
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(let* ((buf (Buffer-menu-buffer t))
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(mod (buffer-modified-p buf))
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(readonly (save-excursion (set-buffer buf) buffer-read-only))
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(buffer-read-only nil))
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(delete-char 3)
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(insert (if readonly (if mod " *%" " %") (if mod " * " " ")))))
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(forward-line (if backup -1 1)))
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(defun Buffer-menu-backup-unmark ()
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"Move up and cancel all requested operations on buffer on line above."
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(interactive)
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(forward-line -1)
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(Buffer-menu-unmark)
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(forward-line -1))
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(defun Buffer-menu-delete (&optional arg)
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"Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command.
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Prefix arg is how many buffers to delete.
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Negative arg means delete backwards."
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(interactive "p")
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(beginning-of-line)
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(if (looking-at " [-M]") ;header lines
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(ding)
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(let ((buffer-read-only nil))
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(if (or (null arg) (= arg 0))
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(setq arg 1))
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(while (> arg 0)
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(delete-char 1)
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(insert ?D)
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(forward-line 1)
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(setq arg (1- arg)))
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(while (< arg 0)
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(delete-char 1)
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(insert ?D)
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(forward-line -1)
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(setq arg (1+ arg))))))
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(defun Buffer-menu-delete-backwards (&optional arg)
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"Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command
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and then move up one line. Prefix arg means move that many lines."
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(interactive "p")
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(Buffer-menu-delete (- (or arg 1)))
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(while (looking-at " [-M]")
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(forward-line 1)))
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(defun Buffer-menu-save ()
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"Mark buffer on this line to be saved by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command."
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(interactive)
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(beginning-of-line)
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(if (looking-at " [-M]") ;header lines
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(ding)
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(let ((buffer-read-only nil))
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(forward-char 1)
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(delete-char 1)
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(insert ?S)
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(forward-line 1))))
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(defun Buffer-menu-not-modified (&optional arg)
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"Mark buffer on this line as unmodified (no changes to save)."
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(interactive "P")
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(save-excursion
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(set-buffer (Buffer-menu-buffer t))
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(set-buffer-modified-p arg))
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(save-excursion
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(beginning-of-line)
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(forward-char 1)
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(if (= (char-after (point)) (if arg ? ?*))
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(let ((buffer-read-only nil))
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(delete-char 1)
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(insert (if arg ?* ? ))))))
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(defun Buffer-menu-execute ()
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"Save and/or delete buffers marked with \\<Buffer-menu-mode-map>\\[Buffer-menu-save] or \\<Buffer-menu-mode-map>\\[Buffer-menu-delete] commands."
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(interactive)
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(save-excursion
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(goto-char (point-min))
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(forward-line 1)
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(while (re-search-forward "^.S" nil t)
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(let ((modp nil))
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(save-excursion
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(set-buffer (Buffer-menu-buffer t))
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(save-buffer)
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(setq modp (buffer-modified-p)))
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(let ((buffer-read-only nil))
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(delete-char -1)
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(insert (if modp ?* ? ))))))
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(save-excursion
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(goto-char (point-min))
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(forward-line 1)
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(let ((buff-menu-buffer (current-buffer))
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(buffer-read-only nil))
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(while (search-forward "\nD" nil t)
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(forward-char -1)
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(let ((buf (Buffer-menu-buffer nil)))
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(or (eq buf nil)
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(eq buf buff-menu-buffer)
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(save-excursion (kill-buffer buf))))
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(if (Buffer-menu-buffer nil)
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(progn (delete-char 1)
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(insert ? ))
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(delete-region (point) (progn (forward-line 1) (point)))
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(forward-char -1))))))
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(defun Buffer-menu-select ()
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"Select this line's buffer; also display buffers marked with `>'.
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You can mark buffers with the \\<Buffer-menu-mode-map>\\[Buffer-menu-mark] command.
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This command deletes and replaces all the previously existing windows
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in the selected frame."
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(interactive)
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(let ((buff (Buffer-menu-buffer t))
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(menu (current-buffer))
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(others ())
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tem)
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(goto-char (point-min))
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(while (search-forward "\n>" nil t)
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(setq tem (Buffer-menu-buffer t))
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(let ((buffer-read-only nil))
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(delete-char -1)
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(insert ?\ ))
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(or (eq tem buff) (memq tem others) (setq others (cons tem others))))
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(setq others (nreverse others)
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tem (/ (1- (frame-height)) (1+ (length others))))
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(delete-other-windows)
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(switch-to-buffer buff)
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(or (eq menu buff)
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(bury-buffer menu))
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(if (equal (length others) 0)
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(progn
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;;; ;; Restore previous window configuration before displaying
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;;; ;; selected buffers.
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;;; (if Buffer-menu-window-config
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;;; (progn
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;;; (set-window-configuration Buffer-menu-window-config)
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;;; (setq Buffer-menu-window-config nil)))
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(switch-to-buffer buff))
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(while others
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(split-window nil tem)
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(other-window 1)
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(switch-to-buffer (car others))
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(setq others (cdr others)))
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(other-window 1) ;back to the beginning!
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)))
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(defun Buffer-menu-visit-tags-table ()
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"Visit the tags table in the buffer on this line. See `visit-tags-table'."
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(interactive)
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(let ((file (buffer-file-name (Buffer-menu-buffer t))))
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(if file
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(visit-tags-table file)
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(error "Specified buffer has no file"))))
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(defun Buffer-menu-1-window ()
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"Select this line's buffer, alone, in full frame."
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(interactive)
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(switch-to-buffer (Buffer-menu-buffer t))
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(bury-buffer (other-buffer))
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(delete-other-windows))
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(defun Buffer-menu-mouse-select (event)
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"Select the buffer whose line you click on."
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(interactive "e")
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(let (buffer)
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(save-excursion
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(set-buffer (window-buffer (posn-window (event-end event))))
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(save-excursion
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(goto-char (posn-point (event-end event)))
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(setq buffer (Buffer-menu-buffer t))))
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(select-window (posn-window (event-end event)))
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(if (and (window-dedicated-p (selected-window))
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(eq (selected-window) (frame-root-window)))
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(switch-to-buffer-other-frame buffer)
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(switch-to-buffer buffer))))
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(defun Buffer-menu-this-window ()
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"Select this line's buffer in this window."
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(interactive)
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(switch-to-buffer (Buffer-menu-buffer t)))
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(defun Buffer-menu-other-window ()
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"Select this line's buffer in other window, leaving buffer menu visible."
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(interactive)
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(switch-to-buffer-other-window (Buffer-menu-buffer t)))
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(defun Buffer-menu-switch-other-window ()
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"Make the other window select this line's buffer.
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The current window remains selected."
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(interactive)
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(display-buffer (Buffer-menu-buffer t)))
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(defun Buffer-menu-2-window ()
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"Select this line's buffer, with previous buffer in second window."
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(interactive)
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(let ((buff (Buffer-menu-buffer t))
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(menu (current-buffer))
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(pop-up-windows t))
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(delete-other-windows)
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(switch-to-buffer (other-buffer))
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(pop-to-buffer buff)
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(bury-buffer menu)))
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(defun Buffer-menu-toggle-read-only ()
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"Toggle read-only status of buffer on this line, perhaps via version control."
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(interactive)
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(let (char)
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(save-excursion
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(set-buffer (Buffer-menu-buffer t))
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(vc-toggle-read-only)
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(setq char (if buffer-read-only ?% ? )))
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(save-excursion
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(beginning-of-line)
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(forward-char 2)
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(if (/= (following-char) char)
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(let (buffer-read-only)
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(delete-char 1)
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(insert char))))))
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(define-key ctl-x-map "\C-b" 'list-buffers)
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(defun list-buffers (&optional files-only)
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"Display a list of names of existing buffers.
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The list is displayed in a buffer named `*Buffer List*'.
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Note that buffers with names starting with spaces are omitted.
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Non-null optional arg FILES-ONLY means mention only file buffers.
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The M column contains a * for buffers that are modified.
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The R column contains a % for buffers that are read-only."
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(interactive "P")
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(display-buffer (list-buffers-noselect files-only)))
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(defun list-buffers-noselect (&optional files-only)
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"Create and return a buffer with a list of names of existing buffers.
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The buffer is named `*Buffer List*'.
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Note that buffers with names starting with spaces are omitted.
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Non-null optional arg FILES-ONLY means mention only file buffers.
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The M column contains a * for buffers that are modified.
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The R column contains a % for buffers that are read-only."
|
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(let ((old-buffer (current-buffer))
|
||
(standard-output standard-output)
|
||
desired-point)
|
||
(save-excursion
|
||
(set-buffer (get-buffer-create "*Buffer List*"))
|
||
(setq buffer-read-only nil)
|
||
(erase-buffer)
|
||
(setq standard-output (current-buffer))
|
||
(princ "\
|
||
MR Buffer Size Mode File
|
||
-- ------ ---- ---- ----
|
||
")
|
||
;; Record the column where buffer names start.
|
||
(setq Buffer-menu-buffer-column 4)
|
||
(let ((bl (buffer-list)))
|
||
(while bl
|
||
(let* ((buffer (car bl))
|
||
(name (buffer-name buffer))
|
||
(file (buffer-file-name buffer))
|
||
this-buffer-line-start
|
||
this-buffer-read-only
|
||
this-buffer-size
|
||
this-buffer-mode-name
|
||
this-buffer-directory)
|
||
(save-excursion
|
||
(set-buffer buffer)
|
||
(setq this-buffer-read-only buffer-read-only)
|
||
(setq this-buffer-size (buffer-size))
|
||
(setq this-buffer-mode-name
|
||
(if (eq buffer standard-output)
|
||
"Buffer Menu" mode-name))
|
||
(or file
|
||
;; No visited file. Check local value of
|
||
;; list-buffers-directory.
|
||
(if (and (boundp 'list-buffers-directory)
|
||
list-buffers-directory)
|
||
(setq this-buffer-directory list-buffers-directory))))
|
||
(cond
|
||
;; Don't mention internal buffers.
|
||
((string= (substring name 0 1) " "))
|
||
;; Maybe don't mention buffers without files.
|
||
((and files-only (not file)))
|
||
;; Otherwise output info.
|
||
(t
|
||
(setq this-buffer-line-start (point))
|
||
;; Identify current buffer.
|
||
(if (eq buffer old-buffer)
|
||
(progn
|
||
(setq desired-point (point))
|
||
(princ "."))
|
||
(princ " "))
|
||
;; Identify modified buffers.
|
||
(princ (if (buffer-modified-p buffer) "*" " "))
|
||
;; Handle readonly status. The output buffer is special
|
||
;; cased to appear readonly; it is actually made so at a later
|
||
;; date.
|
||
(princ (if (or (eq buffer standard-output)
|
||
this-buffer-read-only)
|
||
"% "
|
||
" "))
|
||
(princ name)
|
||
;; Put the buffer name into a text property
|
||
;; so we don't have to extract it from the text.
|
||
;; This way we avoid problems with unusual buffer names.
|
||
(setq this-buffer-line-start
|
||
(+ this-buffer-line-start Buffer-menu-buffer-column))
|
||
(let ((name-end (point)))
|
||
(indent-to 17 2)
|
||
(put-text-property this-buffer-line-start name-end
|
||
'buffer-name name)
|
||
(put-text-property this-buffer-line-start name-end
|
||
'mouse-face 'highlight))
|
||
(let (size
|
||
mode
|
||
(excess (- (current-column) 17)))
|
||
(setq size (format "%8d" this-buffer-size))
|
||
;; Ack -- if looking at the *Buffer List* buffer,
|
||
;; always use "Buffer Menu" mode. Otherwise the
|
||
;; first time the buffer is created, the mode will be wrong.
|
||
(setq mode this-buffer-mode-name)
|
||
(while (and (> excess 0) (= (aref size 0) ?\ ))
|
||
(setq size (substring size 1))
|
||
(setq excess (1- excess)))
|
||
(princ size)
|
||
(indent-to 27 1)
|
||
(princ mode))
|
||
(indent-to 40 1)
|
||
(or file (setq file this-buffer-directory))
|
||
(if file
|
||
(princ file))
|
||
(princ "\n"))))
|
||
(setq bl (cdr bl))))
|
||
(Buffer-menu-mode)
|
||
;; DESIRED-POINT doesn't have to be set; it is not when the
|
||
;; current buffer is not displayed for some reason.
|
||
(and desired-point
|
||
(goto-char desired-point))
|
||
(current-buffer))))
|
||
|
||
;;; buff-menu.el ends here
|