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emacs/lisp/buff-menu.el
2005-09-07 18:48:34 +00:00

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;;; buff-menu.el --- buffer menu main function and support functions -*- coding:utf-8 -*-
;; Copyright (C) 1985, 1986, 1987, 1993, 1994, 1995, 2000, 2001, 2002, 2003,
;; 2004, 2005 Free Software Foundation, Inc.
;; Maintainer: FSF
;; Keywords: convenience
;; 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 2, 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, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; Edit, delete, or change attributes of all currently active Emacs
;; buffers from a list summarizing their state. A good way to browse
;; any special or scratch buffers you have loaded, since you can't find
;; them by filename. The single entry point is `list-buffers',
;; normally bound to C-x C-b.
;;; Change Log:
;; Buffer-menu-view: New function
;; Buffer-menu-view-other-window: New function
;; Merged by esr with recent mods to Emacs 19 buff-menu, 23 Mar 1993
;;
;; Modified by Bob Weiner, Motorola, Inc., 4/14/89
;;
;; Added optional backup argument to 'Buffer-menu-unmark' to make it undelete
;; current entry and then move to previous one.
;;
;; Based on FSF code dating back to 1985.
;;; Code:
;;Trying to preserve the old window configuration works well in
;;simple scenarios, when you enter the buffer menu, use it, and exit it.
;;But it does strange things when you switch back to the buffer list buffer
;;with C-x b, later on, when the window configuration is different.
;;The choice seems to be, either restore the window configuration
;;in all cases, or in no cases.
;;I decided it was better not to restore the window config at all. -- rms.
;;But since then, I changed buffer-menu to use the selected window,
;;so q now once again goes back to the previous window configuration.
;;(defvar Buffer-menu-window-config nil
;; "Window configuration saved from entry to `buffer-menu'.")
;; Put buffer *Buffer List* into proper mode right away
;; so that from now on even list-buffers is enough to get a buffer menu.
(defgroup Buffer-menu nil
"Show a menu of all buffers in a buffer."
:group 'tools
:group 'convenience)
(defcustom Buffer-menu-use-header-line t
"*Non-nil means to use an immovable header-line."
:type 'boolean
:group 'Buffer-menu)
(defface Buffer-menu-buffer
'((t (:weight bold)))
"Face used to highlight buffer name."
:group 'Buffer-menu
:group 'font-lock-highlighting-faces)
(defcustom Buffer-menu-buffer+size-width 26
"*How wide to jointly make the buffer name and size columns."
:type 'number
:group 'Buffer-menu)
(defcustom Buffer-menu-mode-width 16
"*How wide to make the mode name column."
:type 'number
:group 'Buffer-menu)
;; This should get updated & resorted when you click on a column heading
(defvar Buffer-menu-sort-column nil
"*2 for sorting by buffer names. 5 for sorting by file names.
nil for default sorting by visited order.")
(defconst Buffer-menu-buffer-column 4)
(defvar Buffer-menu-mode-map nil
"Local keymap for `Buffer-menu-mode' buffers.")
(defvar Buffer-menu-files-only nil
"Non-nil if the current buffer-menu lists only file buffers.
This variable determines whether reverting the buffer lists only
file buffers. It affects both manual reverting and reverting by
Auto Revert Mode.")
(make-variable-buffer-local 'Buffer-menu-files-only)
(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" 'quit-window)
(define-key Buffer-menu-mode-map "v" '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 "e" 'Buffer-menu-this-window)
(define-key Buffer-menu-mode-map "\C-m" 'Buffer-menu-this-window)
(define-key Buffer-menu-mode-map "o" 'Buffer-menu-other-window)
(define-key Buffer-menu-mode-map "\C-o" 'Buffer-menu-switch-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)
(define-key Buffer-menu-mode-map "%" 'Buffer-menu-toggle-read-only)
(define-key Buffer-menu-mode-map "b" 'Buffer-menu-bury)
(define-key Buffer-menu-mode-map "g" 'Buffer-menu-revert)
(define-key Buffer-menu-mode-map "V" 'Buffer-menu-view)
(define-key Buffer-menu-mode-map "T" 'Buffer-menu-toggle-files-only)
(define-key Buffer-menu-mode-map [mouse-2] 'Buffer-menu-mouse-select)
(define-key Buffer-menu-mode-map [follow-link] 'mouse-face)
)
;; 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-mouse-select] -- select buffer you click on, in place of the buffer menu.
\\[Buffer-menu-this-window] -- select current line's buffer in place of the buffer menu.
\\[Buffer-menu-other-window] -- select that buffer in another window,
so the buffer menu buffer remains visible in its window.
\\[Buffer-menu-view] -- select current line's buffer, but in view-mode.
\\[Buffer-menu-view-other-window] -- select that buffer in
another window, in view-mode.
\\[Buffer-menu-switch-other-window] -- make another window display that buffer.
\\[Buffer-menu-mark] -- mark current line's buffer to be displayed.
\\[Buffer-menu-select] -- select current line's buffer.
Also show buffers marked with m, in other windows.
\\[Buffer-menu-1-window] -- select that buffer in full-frame window.
\\[Buffer-menu-2-window] -- select that buffer in one window,
together with buffer selected before this one in another 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.
With prefix argument, also move up one line.
\\[Buffer-menu-backup-unmark] -- back up a line and remove marks.
\\[Buffer-menu-toggle-read-only] -- toggle read-only status of buffer on this line.
\\[Buffer-menu-revert] -- update the list of buffers.
\\[Buffer-menu-toggle-files-only] -- toggle whether the menu displays only file buffers.
\\[Buffer-menu-bury] -- bury the buffer listed on this line."
(kill-all-local-variables)
(use-local-map Buffer-menu-mode-map)
(setq major-mode 'Buffer-menu-mode)
(setq mode-name "Buffer Menu")
(set (make-local-variable 'revert-buffer-function)
'Buffer-menu-revert-function)
(set (make-local-variable 'buffer-stale-function)
#'(lambda (&optional noconfirm) 'fast))
(setq truncate-lines t)
(setq buffer-read-only t)
(run-mode-hooks 'buffer-menu-mode-hook))
;; This function exists so we can make the doc string of Buffer-menu-mode
;; look nice.
(defun Buffer-menu-revert ()
"Update the list of buffers."
(interactive)
(revert-buffer))
(defun Buffer-menu-revert-function (ignore1 ignore2)
(or (eq buffer-undo-list t)
(setq buffer-undo-list nil))
;; We can not use save-excursion here. The buffer gets erased.
(let ((opoint (point))
(eobp (eobp))
(ocol (current-column))
(oline (progn (move-to-column 4)
(get-text-property (point) 'buffer)))
(prop (point-min))
;; do not make undo records for the reversion.
(buffer-undo-list t))
(list-buffers-noselect Buffer-menu-files-only)
(if oline
(while (setq prop (next-single-property-change prop 'buffer))
(when (eq (get-text-property prop 'buffer) oline)
(goto-char prop)
(move-to-column ocol)))
(goto-char (if eobp (point-max) opoint)))))
(defun Buffer-menu-toggle-files-only (arg)
"Toggle whether the current buffer-menu displays only file buffers.
With a positive ARG display only file buffers. With zero or
negative ARG, display other buffers as well."
(interactive "P")
(setq Buffer-menu-files-only
(cond ((not arg) (not Buffer-menu-files-only))
((> (prefix-numeric-value arg) 0) t)))
(revert-buffer))
(defun Buffer-menu-buffer (error-if-non-existent-p)
"Return buffer described by this line of buffer menu."
(let* ((where (save-excursion
(beginning-of-line)
(+ (point) Buffer-menu-buffer-column)))
(name (and (not (eobp)) (get-text-property where 'buffer-name)))
(buf (and (not (eobp)) (get-text-property where 'buffer))))
(if name
(or (get-buffer name)
(and buf (buffer-name buf) buf)
(if error-if-non-existent-p
(error "No buffer named `%s'" name)
nil))
(or (and buf (buffer-name buf) buf)
(if error-if-non-existent-p
(error "No buffer on this line")
nil)))))
(defun buffer-menu (&optional 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 to remove the buffer menu from the display.
The first column shows `>' for a buffer you have
marked to be displayed, `D' for one you have marked for
deletion, and `.' for the current buffer.
The C column has a `.' for the buffer from which you came.
The R column has a `%' if the buffer is read-only.
The M column has a `*' if it is modified,
or `S' if you have marked it for saving.
After this come the buffer name, its size in characters,
its major mode, and the visited file name (if any)."
(interactive "P")
;;; (setq Buffer-menu-window-config (current-window-configuration))
(switch-to-buffer (list-buffers-noselect arg))
(message
"Commands: d, s, x, u; f, o, 1, 2, m, v; ~, %%; q to quit; ? for help."))
(defun buffer-menu-other-window (&optional arg)
"Display a list of buffers in another window.
With the buffer list buffer, you can save, delete or select the buffers.
With argument, show only buffers that are visiting files.
Type ? after invocation to get help on commands available.
Type q to remove the buffer menu from the display.
For more information, see the function `buffer-menu'."
(interactive "P")
;;; (setq Buffer-menu-window-config (current-window-configuration))
(switch-to-buffer-other-window (list-buffers-noselect arg))
(message
"Commands: d, s, x, u; f, o, 1, 2, m, v; ~, %%; q to quit; ? for help."))
(defun Buffer-menu-no-header ()
(beginning-of-line)
(if (or Buffer-menu-use-header-line
(not (eq (char-after) ?C)))
t
(ding)
(forward-line 1)
nil))
(defun Buffer-menu-mark ()
"Mark buffer on this line for being displayed by \\<Buffer-menu-mode-map>\\[Buffer-menu-select] command."
(interactive)
(when (Buffer-menu-no-header)
(let ((buffer-read-only nil))
(delete-char 1)
(insert ?>)
(forward-line 1))))
(defun Buffer-menu-unmark (&optional backup)
"Cancel all requested operations on buffer on this line and move down.
Optional prefix arg means move up."
(interactive "P")
(when (Buffer-menu-no-header)
(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 (if backup -1 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 (&optional arg)
"Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command.
Prefix arg is how many buffers to delete.
Negative arg means delete backwards."
(interactive "p")
(when (Buffer-menu-no-header)
(let ((buffer-read-only nil))
(if (or (null arg) (= arg 0))
(setq arg 1))
(while (> arg 0)
(delete-char 1)
(insert ?D)
(forward-line 1)
(setq arg (1- arg)))
(while (and (< arg 0)
(Buffer-menu-no-header))
(delete-char 1)
(insert ?D)
(forward-line -1)
(setq arg (1+ arg))))))
(defun Buffer-menu-delete-backwards (&optional arg)
"Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command
and then move up one line. Prefix arg means move that many lines."
(interactive "p")
(Buffer-menu-delete (- (or arg 1))))
(defun Buffer-menu-save ()
"Mark buffer on this line to be saved by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command."
(interactive)
(when (Buffer-menu-no-header)
(let ((buffer-read-only nil))
(forward-char 2)
(delete-char 1)
(insert ?S)
(forward-line 1))))
(defun Buffer-menu-not-modified (&optional arg)
"Mark buffer on this line as unmodified (no changes to save)."
(interactive "P")
(save-excursion
(set-buffer (Buffer-menu-buffer t))
(set-buffer-modified-p arg))
(save-excursion
(beginning-of-line)
(forward-char 2)
(if (= (char-after) (if arg ?\s ?*))
(let ((buffer-read-only nil))
(delete-char 1)
(insert (if arg ?* ?\s))))))
(defun Buffer-menu-beginning ()
(goto-char (point-min))
(unless Buffer-menu-use-header-line
(forward-line)))
(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
(Buffer-menu-beginning)
(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 ?* ?\s))))))
(save-excursion
(Buffer-menu-beginning)
(let ((buff-menu-buffer (current-buffer))
(buffer-read-only nil))
(while (re-search-forward "^D" 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 (and buf (buffer-name buf))
(progn (delete-char 1)
(insert ?\s))
(delete-region (point) (progn (forward-line 1) (point)))
(unless (bobp)
(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.
This command deletes and replaces all the previously existing windows
in the selected frame."
(interactive)
(let ((buff (Buffer-menu-buffer t))
(menu (current-buffer))
(others ())
tem)
(Buffer-menu-beginning)
(while (re-search-forward "^>" nil t)
(setq tem (Buffer-menu-buffer t))
(let ((buffer-read-only nil))
(delete-char -1)
(insert ?\s))
(or (eq tem buff) (memq tem others) (setq others (cons tem others))))
(setq others (nreverse others)
tem (/ (1- (frame-height)) (1+ (length others))))
(delete-other-windows)
(switch-to-buffer buff)
(or (eq menu buff)
(bury-buffer menu))
(if (equal (length others) 0)
(progn
;;; ;; Restore previous window configuration before displaying
;;; ;; selected buffers.
;;; (if Buffer-menu-window-config
;;; (progn
;;; (set-window-configuration Buffer-menu-window-config)
;;; (setq Buffer-menu-window-config nil)))
(switch-to-buffer buff))
(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 frame."
(interactive)
(switch-to-buffer (Buffer-menu-buffer t))
(bury-buffer (other-buffer))
(delete-other-windows))
(defun Buffer-menu-mouse-select (event)
"Select the buffer whose line you click on."
(interactive "e")
(let (buffer)
(save-excursion
(set-buffer (window-buffer (posn-window (event-end event))))
(save-excursion
(goto-char (posn-point (event-end event)))
(setq buffer (Buffer-menu-buffer t))))
(select-window (posn-window (event-end event)))
(if (and (window-dedicated-p (selected-window))
(eq (selected-window) (frame-root-window)))
(switch-to-buffer-other-frame buffer)
(switch-to-buffer buffer))))
(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-switch-other-window ()
"Make the other window select this line's buffer.
The current window remains selected."
(interactive)
(let ((pop-up-windows t)
same-window-buffer-names
same-window-regexps)
(display-buffer (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)
same-window-buffer-names
same-window-regexps)
(delete-other-windows)
(switch-to-buffer (other-buffer))
(pop-to-buffer buff)
(bury-buffer menu)))
(defun Buffer-menu-toggle-read-only ()
"Toggle read-only status of buffer on this line, perhaps via version control."
(interactive)
(let (char)
(save-excursion
(set-buffer (Buffer-menu-buffer t))
(vc-toggle-read-only)
(setq char (if buffer-read-only ?% ?\s)))
(save-excursion
(beginning-of-line)
(forward-char 1)
(if (/= (following-char) char)
(let (buffer-read-only)
(delete-char 1)
(insert char))))))
(defun Buffer-menu-bury ()
"Bury the buffer listed on this line."
(interactive)
(when (Buffer-menu-no-header)
(save-excursion
(beginning-of-line)
(bury-buffer (Buffer-menu-buffer t))
(let ((line (buffer-substring (point) (progn (forward-line 1) (point))))
(buffer-read-only nil))
(delete-region (point) (progn (forward-line -1) (point)))
(goto-char (point-max))
(insert line))
(message "Buried buffer moved to the end"))))
(defun Buffer-menu-view ()
"View this line's buffer in View mode."
(interactive)
(view-buffer (Buffer-menu-buffer t)))
(defun Buffer-menu-view-other-window ()
"View this line's buffer in View mode in another window."
(interactive)
(view-buffer-other-window (Buffer-menu-buffer t)))
(define-key ctl-x-map "\C-b" 'list-buffers)
(defun list-buffers (&optional files-only)
"Display a list of names of existing buffers.
The list is displayed in a buffer named `*Buffer List*'.
Note that buffers with names starting with spaces are omitted.
Non-null optional arg FILES-ONLY means mention only file buffers.
For more information, see the function `buffer-menu'."
(interactive "P")
(display-buffer (list-buffers-noselect files-only)))
(defun Buffer-menu-buffer+size (name size &optional name-props size-props)
(if (> (+ (length name) (length size) 2) Buffer-menu-buffer+size-width)
(setq name
(if (string-match "<[0-9]+>$" name)
(concat (substring name 0
(- Buffer-menu-buffer+size-width
(max (length size) 3)
(match-end 0)
(- (match-beginning 0))
2))
":" ; narrow ellipsis
(match-string 0 name))
(concat (substring name 0
(- Buffer-menu-buffer+size-width
(max (length size) 3)
2))
":"))) ; narrow ellipsis
;; Don't put properties on (buffer-name).
(setq name (copy-sequence name)))
(add-text-properties 0 (length name) name-props name)
(add-text-properties 0 (length size) size-props size)
(concat name
(make-string (- Buffer-menu-buffer+size-width
(length name)
(length size))
?\s)
size))
(defun Buffer-menu-sort (column)
"Sort the buffer menu by COLUMN."
(interactive "P")
(when column
(setq column (prefix-numeric-value column))
(if (< column 2) (setq column 2))
(if (> column 5) (setq column 5)))
(setq Buffer-menu-sort-column column)
(let (buffer-read-only l buf m1 m2)
(save-excursion
(Buffer-menu-beginning)
(while (not (eobp))
(when (buffer-live-p (setq buf (get-text-property (+ (point) 4) 'buffer)))
(setq m1 (char-after)
m1 (if (memq m1 '(?> ?D)) m1)
m2 (char-after (+ (point) 2))
m2 (if (eq m2 ?S) m2))
(if (or m1 m2)
(push (list buf m1 m2) l)))
(forward-line)))
(Buffer-menu-revert)
(setq buffer-read-only)
(save-excursion
(Buffer-menu-beginning)
(while (not (eobp))
(when (setq buf (assq (get-text-property (+ (point) 4) 'buffer) l))
(setq m1 (cadr buf)
m2 (cadr (cdr buf)))
(when m1
(delete-char 1)
(insert m1)
(backward-char 1))
(when m2
(forward-char 2)
(delete-char 1)
(insert m2)))
(forward-line)))))
(defun Buffer-menu-sort-by-column (&optional e)
"Sort the buffer menu by the column clicked on."
(interactive (list last-input-event))
(if e (mouse-select-window e))
(let* ((pos (event-start e))
(obj (posn-object pos))
(col (if obj
(get-text-property (cdr obj) 'column (car obj))
(get-text-property (posn-point pos) 'column))))
(Buffer-menu-sort col)))
(defvar Buffer-menu-sort-button-map
(let ((map (make-sparse-keymap)))
;; This keymap handles both nil and non-nil values for
;; Buffer-menu-use-header-line.
(define-key map [header-line mouse-1] 'Buffer-menu-sort-by-column)
(define-key map [header-line mouse-2] 'Buffer-menu-sort-by-column)
(define-key map [mouse-2] 'Buffer-menu-sort-by-column)
(define-key map [follow-link] 'mouse-face)
(define-key map "\C-m" 'Buffer-menu-sort-by-column)
map)
"Local keymap for Buffer menu sort buttons.")
(defun Buffer-menu-make-sort-button (name column)
(if (equal column Buffer-menu-sort-column) (setq column nil))
(propertize name
'column column
'help-echo (concat
(if Buffer-menu-use-header-line
"mouse-1, mouse-2: sort by "
"mouse-2, RET: sort by ")
(if column (downcase name) "visited order"))
'mouse-face 'highlight
'keymap Buffer-menu-sort-button-map))
(defun list-buffers-noselect (&optional files-only buffer-list)
"Create and return a buffer with a list of names of existing buffers.
The buffer is named `*Buffer List*'.
Note that buffers with names starting with spaces are omitted.
Non-null optional arg FILES-ONLY means mention only file buffers.
If BUFFER-LIST is non-nil, it should be a list of buffers;
it means list those buffers and no others.
For more information, see the function `buffer-menu'."
(let* ((old-buffer (current-buffer))
(standard-output standard-output)
(mode-end (make-string (- Buffer-menu-mode-width 2) ?\s))
(header (concat "CRM "
(Buffer-menu-buffer+size
(Buffer-menu-make-sort-button "Buffer" 2)
(Buffer-menu-make-sort-button "Size" 3))
" "
(Buffer-menu-make-sort-button "Mode" 4) mode-end
(Buffer-menu-make-sort-button "File" 5) "\n"))
list desired-point)
(when Buffer-menu-use-header-line
(let ((pos 0))
;; Turn spaces in the header into stretch specs so they work
;; regardless of the header-line face.
(while (string-match "[ \t]+" header pos)
(setq pos (match-end 0))
(put-text-property (match-beginning 0) pos 'display
;; Assume fixed-size chars in the buffer.
(list 'space :align-to pos)
header)))
;; Try to better align the one-char headers.
(put-text-property 0 3 'face 'fixed-pitch header)
;; Add a "dummy" leading space to align the beginning of the header
;; line with the beginning of the text (rather than with the left
;; scrollbar or the left fringe). -Stef
(setq header (concat (propertize " " 'display '(space :align-to 0))
header)))
(with-current-buffer (get-buffer-create "*Buffer List*")
(setq buffer-read-only nil)
(erase-buffer)
(setq standard-output (current-buffer))
(unless Buffer-menu-use-header-line
(let ((underline (if (char-displayable-p ?—) ?— ?-)))
(insert header
(apply 'string
(mapcar (lambda (c)
(if (memq c '(?\n ?\s)) c underline))
header)))))
;; Collect info for every buffer we're interested in.
(dolist (buffer (or buffer-list (buffer-list)))
(with-current-buffer buffer
(let ((name (buffer-name))
(file buffer-file-name))
(unless (and (not buffer-list)
(or
;; Don't mention internal buffers.
(and (string= (substring name 0 1) " ") (null file))
;; Maybe don't mention buffers without files.
(and files-only (not file))
(string= name "*Buffer List*")))
;; Otherwise output info.
(let ((mode (concat (format-mode-line mode-name nil nil buffer)
(if mode-line-process
(format-mode-line mode-line-process
nil nil buffer))))
(bits (string
(if (eq buffer old-buffer) ?. ?\s)
;; Handle readonly status. The output buffer
;; is special cased to appear readonly; it is
;; actually made so at a later date.
(if (or (eq buffer standard-output)
buffer-read-only)
?% ?\s)
;; Identify modified buffers.
(if (buffer-modified-p) ?* ?\s)
;; Space separator.
?\s)))
(unless file
;; No visited file. Check local value of
;; list-buffers-directory.
(when (and (boundp 'list-buffers-directory)
list-buffers-directory)
(setq file list-buffers-directory)))
(push (list buffer bits name (buffer-size) mode file)
list))))))
;; Preserve the original buffer-list ordering, just in case.
(setq list (nreverse list))
;; Place the buffers's info in the output buffer, sorted if necessary.
(dolist (buffer
(if Buffer-menu-sort-column
(sort list
(if (eq Buffer-menu-sort-column 3)
(lambda (a b)
(< (nth Buffer-menu-sort-column a)
(nth Buffer-menu-sort-column b)))
(lambda (a b)
(string< (nth Buffer-menu-sort-column a)
(nth Buffer-menu-sort-column b)))))
list))
(if (eq (car buffer) old-buffer)
(setq desired-point (point)))
(insert (cadr buffer)
;; 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.
(Buffer-menu-buffer+size (nth 2 buffer)
(int-to-string (nth 3 buffer))
`(buffer-name ,(nth 2 buffer)
buffer ,(car buffer)
font-lock-face Buffer-menu-buffer
mouse-face highlight
help-echo "mouse-2: select this buffer"))
" "
(if (> (length (nth 4 buffer)) Buffer-menu-mode-width)
(substring (nth 4 buffer) 0 Buffer-menu-mode-width)
(nth 4 buffer)))
(when (nth 5 buffer)
(indent-to (+ Buffer-menu-buffer-column Buffer-menu-buffer+size-width
Buffer-menu-mode-width 4) 1)
(princ (abbreviate-file-name (nth 5 buffer))))
(princ "\n"))
(Buffer-menu-mode)
(when Buffer-menu-use-header-line
(setq header-line-format header))
;; 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))
(setq Buffer-menu-files-only files-only)
(set-buffer-modified-p nil)
(current-buffer))))
;; arch-tag: e7dfcfc9-6cb2-46e4-bf55-8ef1936d83c6
;;; buff-menu.el ends here