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285 lines
10 KiB
EmacsLisp
285 lines
10 KiB
EmacsLisp
;; Buffer menu main function and support functions.
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;; Copyright (C) 1985, 1986, 1987 Free Software Foundation, Inc.
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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 1, 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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; 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-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-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 "o" 'Buffer-menu-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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;; 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-mark] -- mark buffer to be displayed.
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\\[Buffer-menu-select] -- select buffer of line point is on.
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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-screen 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-this-window] -- select that buffer in place of the buffer menu buffer.
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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-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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\\[Buffer-menu-backup-unmark] -- back up a line and remove marks."
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(kill-all-local-variables)
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(use-local-map Buffer-menu-mode-map)
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(setq truncate-lines t)
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(setq buffer-read-only t)
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(setq major-mode 'Buffer-menu-mode)
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(setq mode-name "Buffer Menu")
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(run-hooks 'buffer-menu-mode-hook))
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(defvar Buffer-menu-buffer-column 4)
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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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(save-excursion
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(beginning-of-line)
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(forward-char Buffer-menu-buffer-column)
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(let ((start (point))
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string)
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;; End of buffer name marked by tab or two spaces.
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(re-search-forward "\t\\| ")
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(skip-chars-backward " \t")
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(setq string (buffer-substring start (point)))
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(or (get-buffer string)
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(if error-if-non-existent-p
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(error "No buffer named \"%s\"" string)
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nil)))))
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(defun buffer-menu (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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(list-buffers arg)
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(pop-to-buffer "*Buffer List*")
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(forward-line 2)
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(message
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"Commands: d, s, x; 1, 2, m, u, q; delete; ~; ? for help."))
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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 ()
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"Cancel all requested operations on buffer on this line."
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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* ((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 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 ()
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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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(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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(delete-char 1)
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(insert ?D)
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(forward-line 1))))
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(defun Buffer-menu-delete-backwards ()
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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"
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(interactive)
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(Buffer-menu-delete)
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(forward-line -2)
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(if (looking-at " [-M]") (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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(forward-char 1)
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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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(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 ()
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"Mark buffer on this line as unmodified (no changes to save)."
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(interactive)
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(save-excursion
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(set-buffer (Buffer-menu-buffer t))
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(set-buffer-modified-p nil))
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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 (looking-at "\\*")
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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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(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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(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- (screen-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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(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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(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 screen."
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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-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-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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(switch-to-buffer (other-buffer))
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(pop-to-buffer buff)
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(bury-buffer menu)))
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