1
0
mirror of https://git.savannah.gnu.org/git/emacs.git synced 2024-11-22 07:09:54 +00:00
emacs/lisp/buff-menu.el
Richard M. Stallman bd7602f2ae (list-buffers-noselect): Don't let space after buf name
inherit the text props from it.
1995-06-15 20:07:56 +00:00

544 lines
19 KiB
EmacsLisp
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

;;; buff-menu.el --- buffer menu main function and support functions.
;; Copyright (C) 1985, 86, 87, 93, 94, 95 Free Software Foundation, Inc.
;; Maintainer: FSF
;; 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, 675 Mass Ave, Cambridge, MA 02139, 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 `Buffer-menu-mode',
;; normally bound to C-x C-b.
;;; Change Log:
;; 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.
(defvar Buffer-menu-buffer-column nil)
(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-quit)
(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 "\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 "g" 'revert-buffer)
(define-key Buffer-menu-mode-map [mouse-2] 'Buffer-menu-mouse-select)
)
;; 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-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."
(kill-all-local-variables)
(use-local-map Buffer-menu-mode-map)
(setq major-mode 'Buffer-menu-mode)
(setq mode-name "Buffer Menu")
(make-local-variable 'revert-buffer-function)
(setq revert-buffer-function 'Buffer-menu-revert-function)
(setq truncate-lines t)
(setq buffer-read-only t)
(run-hooks 'buffer-menu-mode-hook))
(defun Buffer-menu-revert-function (ignore1 ignore2)
(list-buffers))
(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))))
(if name
(or (get-buffer name)
(if error-if-non-existent-p
(error "No buffer named `%s'" name)
nil))
(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 immediately to make the buffer menu go away."
(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 immediately to make the buffer menu go away."
(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-quit ()
"Quit the buffer menu."
(interactive)
(let ((buffer (current-buffer)))
;; Switch away from the buffer menu and bury it.
(switch-to-buffer (other-buffer))
(bury-buffer buffer)))
(defun Buffer-menu-mark ()
"Mark buffer on this line for being displayed by \\<Buffer-menu-mode-map>\\[Buffer-menu-select] command."
(interactive)
(beginning-of-line)
(if (looking-at " [-M]")
(ding)
(let ((buffer-read-only nil))
(delete-char 1)
(insert ?>)
(forward-line 1))))
(defun Buffer-menu-unmark (&optional backup)
"Cancel all requested operations on buffer on this line and move down.
Optional ARG means move up."
(interactive "P")
(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 (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")
(beginning-of-line)
(if (looking-at " [-M]") ;header lines
(ding)
(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 (< arg 0)
(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)))
(while (looking-at " [-M]")
(forward-line 1)))
(defun Buffer-menu-save ()
"Mark buffer on this line to be saved by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command."
(interactive)
(beginning-of-line)
(if (looking-at " [-M]") ;header lines
(ding)
(let ((buffer-read-only nil))
(forward-char 1)
(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 1)
(if (= (char-after (point)) (if arg ? ?*))
(let ((buffer-read-only nil))
(delete-char 1)
(insert (if arg ?* ? ))))))
(defun Buffer-menu-execute ()
"Save and/or delete buffers marked with \\<Buffer-menu-mode-map>\\[Buffer-menu-save] or \\<Buffer-menu-mode-map>\\[Buffer-menu-delete] commands."
(interactive)
(save-excursion
(goto-char (point-min))
(forward-line 1)
(while (re-search-forward "^.S" nil t)
(let ((modp nil))
(save-excursion
(set-buffer (Buffer-menu-buffer t))
(save-buffer)
(setq modp (buffer-modified-p)))
(let ((buffer-read-only nil))
(delete-char -1)
(insert (if modp ?* ? ))))))
(save-excursion
(goto-char (point-min))
(forward-line 1)
(let ((buff-menu-buffer (current-buffer))
(buffer-read-only nil))
(while (search-forward "\nD" nil t)
(forward-char -1)
(let ((buf (Buffer-menu-buffer nil)))
(or (eq buf nil)
(eq buf buff-menu-buffer)
(save-excursion (kill-buffer buf))))
(if (Buffer-menu-buffer nil)
(progn (delete-char 1)
(insert ? ))
(delete-region (point) (progn (forward-line 1) (point)))
(forward-char -1))))))
(defun Buffer-menu-select ()
"Select this line's buffer; also display buffers marked with `>'.
You can mark buffers with the \\<Buffer-menu-mode-map>\\[Buffer-menu-mark] command.
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)
(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- (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)
(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))
(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 ?% ? )))
(save-excursion
(beginning-of-line)
(forward-char 2)
(if (/= (following-char) char)
(let (buffer-read-only)
(delete-char 1)
(insert char))))))
(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.
The M column contains a * for buffers that are modified.
The R column contains a % for buffers that are read-only."
(interactive "P")
(display-buffer (list-buffers-noselect files-only)))
(defun list-buffers-noselect (&optional files-only)
"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.
The M column contains a * for buffers that are modified.
The R column contains a % for buffers that are read-only."
(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