lisp/buff-menu.el

   1 ;;; buff-menu.el --- buffer menu main function and support functions -*- coding:utf-8 -*-
   2
   3 ;; Copyright (C) 1985, 1986, 1987, 1993, 1994, 1995, 2000, 2001, 2002, 2003,
   4 ;;   2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
   5
   6 ;; Maintainer: FSF
   7 ;; Keywords: convenience
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software: you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation, either version 3 of the License, or
  14 ;; (at your option) any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ;;; Commentary:
  25
  26 ;; Edit, delete, or change attributes of all currently active Emacs
  27 ;; buffers from a list summarizing their state.  A good way to browse
  28 ;; any special or scratch buffers you have loaded, since you can't find
  29 ;; them by filename.  The single entry point is `list-buffers',
  30 ;; normally bound to C-x C-b.
  31
  32 ;;; Change Log:
  33
  34 ;; Buffer-menu-view: New function
  35 ;; Buffer-menu-view-other-window: New function
  36
  37 ;; Merged by esr with recent mods to Emacs 19 buff-menu, 23 Mar 1993
  38 ;;
  39 ;; Modified by Bob Weiner, Motorola, Inc., 4/14/89
  40 ;;
  41 ;; Added optional backup argument to 'Buffer-menu-unmark' to make it undelete
  42 ;; current entry and then move to previous one.
  43 ;;
  44 ;; Based on FSF code dating back to 1985.
  45
  46 ;;; Code:
  47
  48 ;;Trying to preserve the old window configuration works well in
  49 ;;simple scenarios, when you enter the buffer menu, use it, and exit it.
  50 ;;But it does strange things when you switch back to the buffer list buffer
  51 ;;with C-x b, later on, when the window configuration is different.
  52 ;;The choice seems to be, either restore the window configuration
  53 ;;in all cases, or in no cases.
  54 ;;I decided it was better not to restore the window config at all. -- rms.
  55
  56 ;;But since then, I changed buffer-menu to use the selected window,
  57 ;;so q now once again goes back to the previous window configuration.
  58
  59 ;;(defvar Buffer-menu-window-config nil
  60 ;;  "Window configuration saved from entry to `buffer-menu'.")
  61
  62 ;; Put buffer *Buffer List* into proper mode right away
  63 ;; so that from now on even list-buffers is enough to get a buffer menu.
  64
  65 (defgroup Buffer-menu nil
  66   "Show a menu of all buffers in a buffer."
  67   :group 'tools
  68   :group 'convenience)
  69
  70 (defcustom Buffer-menu-use-header-line t
  71   "Non-nil means to use an immovable header-line."
  72   :type 'boolean
  73   :group 'Buffer-menu)
  74
  75 (defface buffer-menu-buffer
  76   '((t (:weight bold)))
  77   "Face used to highlight buffer names in the buffer menu."
  78   :group 'Buffer-menu)
  79 (put 'Buffer-menu-buffer 'face-alias 'buffer-menu-buffer)
  80
  81 (defcustom Buffer-menu-buffer+size-width 26
  82   "How wide to jointly make the buffer name and size columns."
  83   :type 'number
  84   :group 'Buffer-menu)
  85
  86 (defcustom Buffer-menu-mode-width 16
  87   "How wide to make the mode name column."
  88   :type 'number
  89   :group 'Buffer-menu)
  90
  91 (defcustom Buffer-menu-use-frame-buffer-list t
  92   "If non-nil, the Buffer Menu uses the selected frame's buffer list.
  93 Buffers that were never selected in that frame are listed at the end.
  94 If the value is nil, the Buffer Menu uses the global buffer list.
  95 This variable matters if the Buffer Menu is sorted by visited order,
  96 as it is by default."
  97   :type 'boolean
  98   :group 'Buffer-menu
  99   :version "22.1")
 100
 101 ;; This should get updated & resorted when you click on a column heading
 102 (defvar Buffer-menu-sort-column nil
 103   "Which column to sort the menu on.
 104 Use 2 to sort by buffer names, or 5 to sort by file names.
 105 A nil value means sort by visited order (the default).")
 106
 107 (defconst Buffer-menu-buffer-column 4)
 108
 109 (defvar Buffer-menu-files-only nil
 110   "Non-nil if the current buffer-menu lists only file buffers.
 111 This variable determines whether reverting the buffer lists only
 112 file buffers.  It affects both manual reverting and reverting by
 113 Auto Revert Mode.")
 114
 115 (make-variable-buffer-local 'Buffer-menu-files-only)
 116
 117 (defvar Info-current-file) ;; from info.el
 118 (defvar Info-current-node) ;; from info.el
 119
 120 (defvar Buffer-menu-mode-map
 121   (let ((map (make-keymap))
 122         (menu-map (make-sparse-keymap)))
 123     (suppress-keymap map t)
 124     (define-key map "v" 'Buffer-menu-select)
 125     (define-key map "2" 'Buffer-menu-2-window)
 126     (define-key map "1" 'Buffer-menu-1-window)
 127     (define-key map "f" 'Buffer-menu-this-window)
 128     (define-key map "e" 'Buffer-menu-this-window)
 129     (define-key map "\C-m" 'Buffer-menu-this-window)
 130     (define-key map "o" 'Buffer-menu-other-window)
 131     (define-key map "\C-o" 'Buffer-menu-switch-other-window)
 132     (define-key map "s" 'Buffer-menu-save)
 133     (define-key map "d" 'Buffer-menu-delete)
 134     (define-key map "k" 'Buffer-menu-delete)
 135     (define-key map "\C-d" 'Buffer-menu-delete-backwards)
 136     (define-key map "\C-k" 'Buffer-menu-delete)
 137     (define-key map "x" 'Buffer-menu-execute)
 138     (define-key map " " 'next-line)
 139     (define-key map "n" 'next-line)
 140     (define-key map "p" 'previous-line)
 141     (define-key map "\177" 'Buffer-menu-backup-unmark)
 142     (define-key map "~" 'Buffer-menu-not-modified)
 143     (define-key map "u" 'Buffer-menu-unmark)
 144     (define-key map "m" 'Buffer-menu-mark)
 145     (define-key map "t" 'Buffer-menu-visit-tags-table)
 146     (define-key map "%" 'Buffer-menu-toggle-read-only)
 147     (define-key map "b" 'Buffer-menu-bury)
 148     (define-key map "V" 'Buffer-menu-view)
 149     (define-key map "T" 'Buffer-menu-toggle-files-only)
 150     (define-key map [mouse-2] 'Buffer-menu-mouse-select)
 151     (define-key map [follow-link] 'mouse-face)
 152     (define-key map (kbd "M-s a C-s")   'Buffer-menu-isearch-buffers)
 153     (define-key map (kbd "M-s a M-C-s") 'Buffer-menu-isearch-buffers-regexp)
 154     (define-key map [menu-bar Buffer-menu-mode] (cons "Buffer Menu" menu-map))
 155     (define-key menu-map [quit]
 156       '(menu-item "Quit" quit-window
 157                  :help "Mark buffer on this line to be deleted by x command"))
 158     (define-key menu-map [rev]
 159       '(menu-item "Refresh" revert-buffer
 160                  :help "Refresh the *Buffer List* buffer contents"))
 161     (define-key menu-map [s0] '("--"))
 162     (define-key menu-map [tf]
 163       '(menu-item "Show only file buffers" Buffer-menu-toggle-files-only
 164                   :button (:toggle . Buffer-menu-files-only)
 165                   :help "Toggle whether the current buffer-menu displays only file buffers"))
 166     (define-key menu-map [s1] '("--"))
 167     ;; FIXME: The "Select" entries could use better names...
 168     (define-key menu-map [sel]
 169       '(menu-item "Select marked" Buffer-menu-select
 170                  :help "Select this line's buffer; also display buffers marked with `>'"))
 171     (define-key menu-map [bm2]
 172       '(menu-item "Select two" Buffer-menu-2-window
 173                  :help "Select this line's buffer, with previous buffer in second window"))
 174     (define-key menu-map [bm1]
 175       '(menu-item "Select current" Buffer-menu-1-window
 176                  :help "Select this line's buffer, alone, in full frame"))
 177     (define-key menu-map [ow]
 178       '(menu-item "Select in other window" Buffer-menu-other-window
 179                  :help "Select this line's buffer in other window, leaving buffer menu visible"))
 180     (define-key menu-map [tw]
 181       '(menu-item "Select in current window" Buffer-menu-this-window
 182                  :help "Select this line's buffer in this window"))
 183     (define-key menu-map [s2] '("--"))
 184     (define-key menu-map [is]
 185       '(menu-item "Regexp Isearch marked buffers" Buffer-menu-isearch-buffers-regexp
 186                  :help "Search for a regexp through all marked buffers using Isearch"))
 187     (define-key menu-map [ir]
 188       '(menu-item "Isearch marked buffers" Buffer-menu-isearch-buffers
 189                  :help "Search for a string through all marked buffers using Isearch"))
 190     (define-key menu-map [s3] '("--"))
 191     (define-key menu-map [by]
 192       '(menu-item "Bury" Buffer-menu-bury
 193                  :help "Bury the buffer listed on this line"))
 194     (define-key menu-map [vt]
 195       '(menu-item "Set unmodified" Buffer-menu-not-modified
 196                  :help "Mark buffer on this line as unmodified (no changes to save)"))
 197     (define-key menu-map [ex]
 198       '(menu-item "Execute" Buffer-menu-execute
 199                  :help "Save and/or delete buffers marked with s or k commands"))
 200     (define-key menu-map [s4] '("--"))
 201     (define-key menu-map [delb]
 202       '(menu-item "Mark for delete and move backwards" Buffer-menu-delete-backwards
 203                  :help "Mark buffer on this line to be deleted by x command and move up one line"))
 204     (define-key menu-map [del]
 205       '(menu-item "Mark for delete" Buffer-menu-delete
 206                  :help "Mark buffer on this line to be deleted by x command"))
 207
 208     (define-key menu-map [sv]
 209       '(menu-item "Mark for save" Buffer-menu-save
 210                  :help "Mark buffer on this line to be saved by x command"))
 211     (define-key menu-map [umk]
 212       '(menu-item "Unmark" Buffer-menu-unmark
 213                  :help "Cancel all requested operations on buffer on this line and move down"))
 214     (define-key menu-map [mk]
 215       '(menu-item "Mark" Buffer-menu-mark
 216                  :help "Mark buffer on this line for being displayed by v command"))
 217     map)
 218   "Local keymap for `Buffer-menu-mode' buffers.")
 219
 220 ;; Buffer Menu mode is suitable only for specially formatted data.
 221 (put 'Buffer-menu-mode 'mode-class 'special)
 222
 223 (define-derived-mode Buffer-menu-mode special-mode "Buffer Menu"
 224   "Major mode for editing a list of buffers.
 225 Each line describes one of the buffers in Emacs.
 226 Letters do not insert themselves; instead, they are commands.
 227 \\<Buffer-menu-mode-map>
 228 \\[Buffer-menu-mouse-select] -- select buffer you click on, in place of the buffer menu.
 229 \\[Buffer-menu-this-window] -- select current line's buffer in place of the buffer menu.
 230 \\[Buffer-menu-other-window] -- select that buffer in another window,
 231   so the buffer menu buffer remains visible in its window.
 232 \\[Buffer-menu-view] -- select current line's buffer, but in view-mode.
 233 \\[Buffer-menu-view-other-window] -- select that buffer in
 234   another window, in view-mode.
 235 \\[Buffer-menu-switch-other-window] -- make another window display that buffer.
 236 \\[Buffer-menu-mark] -- mark current line's buffer to be displayed.
 237 \\[Buffer-menu-select] -- select current line's buffer.
 238   Also show buffers marked with m, in other windows.
 239 \\[Buffer-menu-1-window] -- select that buffer in full-frame window.
 240 \\[Buffer-menu-2-window] -- select that buffer in one window,
 241   together with buffer selected before this one in another window.
 242 \\[Buffer-menu-isearch-buffers] -- Do incremental search in the marked buffers.
 243 \\[Buffer-menu-isearch-buffers-regexp] -- Isearch for regexp in the marked buffers.
 244 \\[Buffer-menu-visit-tags-table] -- visit-tags-table this buffer.
 245 \\[Buffer-menu-not-modified] -- clear modified-flag on that buffer.
 246 \\[Buffer-menu-save] -- mark that buffer to be saved, and move down.
 247 \\[Buffer-menu-delete] -- mark that buffer to be deleted, and move down.
 248 \\[Buffer-menu-delete-backwards] -- mark that buffer to be deleted, and move up.
 249 \\[Buffer-menu-execute] -- delete or save marked buffers.
 250 \\[Buffer-menu-unmark] -- remove all kinds of marks from current line.
 251   With prefix argument, also move up one line.
 252 \\[Buffer-menu-backup-unmark] -- back up a line and remove marks.
 253 \\[Buffer-menu-toggle-read-only] -- toggle read-only status of buffer on this line.
 254 \\[revert-buffer] -- update the list of buffers.
 255 \\[Buffer-menu-toggle-files-only] -- toggle whether the menu displays only file buffers.
 256 \\[Buffer-menu-bury] -- bury the buffer listed on this line."
 257   (set (make-local-variable 'revert-buffer-function)
 258        'Buffer-menu-revert-function)
 259   (set (make-local-variable 'buffer-stale-function)
 260        #'(lambda (&optional noconfirm) 'fast))
 261   (setq truncate-lines t)
 262   (setq buffer-read-only t))
 263
 264 (define-obsolete-variable-alias 'buffer-menu-mode-hook
 265   'Buffer-menu-mode-hook "23.1")
 266
 267 (defun Buffer-menu-revert-function (ignore1 ignore2)
 268   (or (eq buffer-undo-list t)
 269       (setq buffer-undo-list nil))
 270   ;; We can not use save-excursion here.  The buffer gets erased.
 271   (let ((opoint (point))
 272         (eobp (eobp))
 273         (ocol (current-column))
 274         (oline (progn (move-to-column 4)
 275                       (get-text-property (point) 'buffer)))
 276         (prop (point-min))
 277         ;; do not make undo records for the reversion.
 278         (buffer-undo-list t))
 279     ;; We can be called by Auto Revert Mode with the "*Buffer Menu*"
 280     ;; temporarily the current buffer.  Make sure that the
 281     ;; interactively current buffer is correctly identified with a `.'
 282     ;; by `list-buffers-noselect'.
 283     (with-current-buffer (window-buffer)
 284       (list-buffers-noselect Buffer-menu-files-only))
 285     (if oline
 286         (while (setq prop (next-single-property-change prop 'buffer))
 287           (when (eq (get-text-property prop 'buffer) oline)
 288             (goto-char prop)
 289             (move-to-column ocol)))
 290       (goto-char (if eobp (point-max) opoint)))))
 291
 292 (defun Buffer-menu-toggle-files-only (arg)
 293   "Toggle whether the current buffer-menu displays only file buffers.
 294 With a positive ARG display only file buffers.  With zero or
 295 negative ARG, display other buffers as well."
 296   (interactive "P")
 297   (setq Buffer-menu-files-only
 298         (cond ((not arg) (not Buffer-menu-files-only))
 299               ((> (prefix-numeric-value arg) 0) t)))
 300   (revert-buffer))
 301
 302 \f
 303 (defun Buffer-menu-buffer (error-if-non-existent-p)
 304   "Return buffer described by this line of buffer menu."
 305   (let* ((where (save-excursion
 306                   (beginning-of-line)
 307                   (+ (point) Buffer-menu-buffer-column)))
 308          (name (and (not (eobp)) (get-text-property where 'buffer-name)))
 309          (buf (and (not (eobp)) (get-text-property where 'buffer))))
 310     (if name
 311         (or (get-buffer name)
 312             (and buf (buffer-name buf) buf)
 313             (if error-if-non-existent-p
 314                 (error "No buffer named `%s'" name)
 315               nil))
 316       (or (and buf (buffer-name buf) buf)
 317           (if error-if-non-existent-p
 318               (error "No buffer on this line")
 319             nil)))))
 320 \f
 321 (defun buffer-menu (&optional arg)
 322   "Make a menu of buffers so you can save, delete or select them.
 323 With argument, show only buffers that are visiting files.
 324 Type ? after invocation to get help on commands available.
 325 Type q to remove the buffer menu from the display.
 326
 327 The first column shows `>' for a buffer you have
 328 marked to be displayed, `D' for one you have marked for
 329 deletion, and `.' for the current buffer.
 330
 331 The C column has a `.' for the buffer from which you came.
 332 The R column has a `%' if the buffer is read-only.
 333 The M column has a `*' if it is modified,
 334 or `S' if you have marked it for saving.
 335 After this come the buffer name, its size in characters,
 336 its major mode, and the visited file name (if any)."
 337   (interactive "P")
 338 ;;;  (setq Buffer-menu-window-config (current-window-configuration))
 339   (switch-to-buffer (list-buffers-noselect arg))
 340   (message
 341    "Commands: d, s, x, u; f, o, 1, 2, m, v; ~, %%; q to quit; ? for help."))
 342
 343 (defun buffer-menu-other-window (&optional arg)
 344   "Display a list of buffers in another window.
 345 With the buffer list buffer, you can save, delete or select the buffers.
 346 With argument, show only buffers that are visiting files.
 347 Type ? after invocation to get help on commands available.
 348 Type q to remove the buffer menu from the display.
 349 For more information, see the function `buffer-menu'."
 350   (interactive "P")
 351 ;;;  (setq Buffer-menu-window-config (current-window-configuration))
 352   (switch-to-buffer-other-window (list-buffers-noselect arg))
 353   (message
 354    "Commands: d, s, x, u; f, o, 1, 2, m, v; ~, %%; q to quit; ? for help."))
 355
 356 (defun Buffer-menu-no-header ()
 357   (beginning-of-line)
 358   (if (or Buffer-menu-use-header-line
 359           (not (eq (char-after) ?C)))
 360       t
 361     (ding)
 362     (forward-line 1)
 363     nil))
 364
 365 (defun Buffer-menu-mark ()
 366   "Mark buffer on this line for being displayed by \\<Buffer-menu-mode-map>\\[Buffer-menu-select] command."
 367   (interactive)
 368   (when (Buffer-menu-no-header)
 369     (let ((inhibit-read-only t))
 370       (delete-char 1)
 371       (insert ?>)
 372       (forward-line 1))))
 373
 374 (defun Buffer-menu-unmark (&optional backup)
 375   "Cancel all requested operations on buffer on this line and move down.
 376 Optional prefix arg means move up."
 377   (interactive "P")
 378   (when (Buffer-menu-no-header)
 379     (let* ((buf (Buffer-menu-buffer t))
 380            (mod (buffer-modified-p buf))
 381            (readonly (with-current-buffer buf buffer-read-only))
 382            (inhibit-read-only t))
 383       (delete-char 3)
 384       (insert (if readonly (if mod " %*" " % ") (if mod "  *" "   ")))))
 385   (forward-line (if backup -1 1)))
 386
 387 (defun Buffer-menu-backup-unmark ()
 388   "Move up and cancel all requested operations on buffer on line above."
 389   (interactive)
 390   (forward-line -1)
 391   (Buffer-menu-unmark)
 392   (forward-line -1))
 393
 394 (defun Buffer-menu-delete (&optional arg)
 395   "Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command.
 396 Prefix arg is how many buffers to delete.
 397 Negative arg means delete backwards."
 398   (interactive "p")
 399   (when (Buffer-menu-no-header)
 400     (let ((inhibit-read-only t))
 401       (if (or (null arg) (= arg 0))
 402           (setq arg 1))
 403       (while (> arg 0)
 404         (delete-char 1)
 405         (insert ?D)
 406         (forward-line 1)
 407         (setq arg (1- arg)))
 408       (while (and (< arg 0)
 409                   (Buffer-menu-no-header))
 410         (delete-char 1)
 411         (insert ?D)
 412         (forward-line -1)
 413         (setq arg (1+ arg))))))
 414
 415 (defun Buffer-menu-delete-backwards (&optional arg)
 416   "Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command
 417 and then move up one line.  Prefix arg means move that many lines."
 418   (interactive "p")
 419   (Buffer-menu-delete (- (or arg 1))))
 420
 421 (defun Buffer-menu-save ()
 422   "Mark buffer on this line to be saved by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command."
 423   (interactive)
 424   (when (Buffer-menu-no-header)
 425     (let ((inhibit-read-only t))
 426       (forward-char 2)
 427       (delete-char 1)
 428       (insert ?S)
 429       (forward-line 1))))
 430
 431 (defun Buffer-menu-not-modified (&optional arg)
 432   "Mark buffer on this line as unmodified (no changes to save)."
 433   (interactive "P")
 434   (with-current-buffer (Buffer-menu-buffer t)
 435     (set-buffer-modified-p arg))
 436   (save-excursion
 437    (beginning-of-line)
 438    (forward-char 2)
 439    (if (= (char-after) (if arg ?\s ?*))
 440        (let ((inhibit-read-only t))
 441          (delete-char 1)
 442          (insert (if arg ?* ?\s))))))
 443
 444 (defun Buffer-menu-beginning ()
 445   (goto-char (point-min))
 446   (unless Buffer-menu-use-header-line
 447     (forward-line)))
 448
 449 (defun Buffer-menu-execute ()
 450   "Save and/or delete buffers marked with \\<Buffer-menu-mode-map>\\[Buffer-menu-save] or \\<Buffer-menu-mode-map>\\[Buffer-menu-delete] commands."
 451   (interactive)
 452   (save-excursion
 453     (Buffer-menu-beginning)
 454     (while (re-search-forward "^..S" nil t)
 455       (let ((modp nil))
 456         (with-current-buffer (Buffer-menu-buffer t)
 457           (save-buffer)
 458           (setq modp (buffer-modified-p)))
 459         (let ((inhibit-read-only t))
 460           (delete-char -1)
 461           (insert (if modp ?* ?\s))))))
 462   (save-excursion
 463     (Buffer-menu-beginning)
 464     (let ((buff-menu-buffer (current-buffer))
 465           (inhibit-read-only t))
 466       (while (re-search-forward "^D" nil t)
 467         (forward-char -1)
 468         (let ((buf (Buffer-menu-buffer nil)))
 469           (or (eq buf nil)
 470               (eq buf buff-menu-buffer)
 471               (save-excursion (kill-buffer buf)))
 472           (if (and buf (buffer-name buf))
 473             (progn (delete-char 1)
 474                    (insert ?\s))
 475           (delete-region (point) (progn (forward-line 1) (point)))
 476             (unless (bobp)
 477               (forward-char -1))))))))
 478
 479 (defun Buffer-menu-select ()
 480   "Select this line's buffer; also display buffers marked with `>'.
 481 You can mark buffers with the \\<Buffer-menu-mode-map>\\[Buffer-menu-mark] command.
 482 This command deletes and replaces all the previously existing windows
 483 in the selected frame."
 484   (interactive)
 485   (let ((buff (Buffer-menu-buffer t))
 486         (menu (current-buffer))
 487         (others ())
 488         tem)
 489     (Buffer-menu-beginning)
 490     (while (re-search-forward "^>" nil t)
 491       (setq tem (Buffer-menu-buffer t))
 492       (let ((inhibit-read-only t))
 493         (delete-char -1)
 494         (insert ?\s))
 495       (or (eq tem buff) (memq tem others) (setq others (cons tem others))))
 496     (setq others (nreverse others)
 497           tem (/ (1- (frame-height)) (1+ (length others))))
 498     (delete-other-windows)
 499     (switch-to-buffer buff)
 500     (or (eq menu buff)
 501         (bury-buffer menu))
 502     (if (equal (length others) 0)
 503         (progn
 504 ;;;       ;; Restore previous window configuration before displaying
 505 ;;;       ;; selected buffers.
 506 ;;;       (if Buffer-menu-window-config
 507 ;;;           (progn
 508 ;;;             (set-window-configuration Buffer-menu-window-config)
 509 ;;;             (setq Buffer-menu-window-config nil)))
 510           (switch-to-buffer buff))
 511       (while others
 512         (split-window nil tem)
 513         (other-window 1)
 514         (switch-to-buffer (car others))
 515         (setq others (cdr others)))
 516       (other-window 1)                          ;back to the beginning!
 517 )))
 518
 519 (defun Buffer-menu-marked-buffers ()
 520   "Return a list of buffers marked with the \\<Buffer-menu-mode-map>\\[Buffer-menu-mark] command."
 521   (let (buffers)
 522     (Buffer-menu-beginning)
 523     (while (re-search-forward "^>" nil t)
 524       (setq buffers (cons (Buffer-menu-buffer t) buffers)))
 525     (nreverse buffers)))
 526
 527 (defun Buffer-menu-isearch-buffers ()
 528   "Search for a string through all marked buffers using Isearch."
 529   (interactive)
 530   (multi-isearch-buffers (Buffer-menu-marked-buffers)))
 531
 532 (defun Buffer-menu-isearch-buffers-regexp ()
 533   "Search for a regexp through all marked buffers using Isearch."
 534   (interactive)
 535   (multi-isearch-buffers-regexp (Buffer-menu-marked-buffers)))
 536
 537 \f
 538 (defun Buffer-menu-visit-tags-table ()
 539   "Visit the tags table in the buffer on this line.  See `visit-tags-table'."
 540   (interactive)
 541   (let ((file (buffer-file-name (Buffer-menu-buffer t))))
 542     (if file
 543         (visit-tags-table file)
 544       (error "Specified buffer has no file"))))
 545
 546 (defun Buffer-menu-1-window ()
 547   "Select this line's buffer, alone, in full frame."
 548   (interactive)
 549   (switch-to-buffer (Buffer-menu-buffer t))
 550   (bury-buffer (other-buffer))
 551   (delete-other-windows))
 552
 553 (defun Buffer-menu-mouse-select (event)
 554   "Select the buffer whose line you click on."
 555   (interactive "e")
 556   (let (buffer)
 557     (with-current-buffer (window-buffer (posn-window (event-end event)))
 558       (save-excursion
 559         (goto-char (posn-point (event-end event)))
 560         (setq buffer (Buffer-menu-buffer t))))
 561     (select-window (posn-window (event-end event)))
 562     (if (and (window-dedicated-p (selected-window))
 563              (eq (selected-window) (frame-root-window)))
 564         (switch-to-buffer-other-frame buffer)
 565       (switch-to-buffer buffer))))
 566
 567 (defun Buffer-menu-this-window ()
 568   "Select this line's buffer in this window."
 569   (interactive)
 570   (switch-to-buffer (Buffer-menu-buffer t)))
 571
 572 (defun Buffer-menu-other-window ()
 573   "Select this line's buffer in other window, leaving buffer menu visible."
 574   (interactive)
 575   (switch-to-buffer-other-window (Buffer-menu-buffer t)))
 576
 577 (defun Buffer-menu-switch-other-window ()
 578   "Make the other window select this line's buffer.
 579 The current window remains selected."
 580   (interactive)
 581   (let ((pop-up-windows t)
 582         same-window-buffer-names
 583         same-window-regexps)
 584     (display-buffer (Buffer-menu-buffer t))))
 585
 586 (defun Buffer-menu-2-window ()
 587   "Select this line's buffer, with previous buffer in second window."
 588   (interactive)
 589   (let ((buff (Buffer-menu-buffer t))
 590         (menu (current-buffer))
 591         (pop-up-windows t)
 592         same-window-buffer-names
 593         same-window-regexps)
 594     (delete-other-windows)
 595     (switch-to-buffer (other-buffer))
 596     (pop-to-buffer buff)
 597     (bury-buffer menu)))
 598
 599 (defun Buffer-menu-toggle-read-only ()
 600   "Toggle read-only status of buffer on this line, perhaps via version control."
 601   (interactive)
 602   (let (char)
 603     (with-current-buffer (Buffer-menu-buffer t)
 604       (toggle-read-only)
 605       (setq char (if buffer-read-only ?% ?\s)))
 606     (save-excursion
 607       (beginning-of-line)
 608       (forward-char 1)
 609       (if (/= (following-char) char)
 610           (let ((inhibit-read-only t))
 611             (delete-char 1)
 612             (insert char))))))
 613
 614 (defun Buffer-menu-bury ()
 615   "Bury the buffer listed on this line."
 616   (interactive)
 617   (when (Buffer-menu-no-header)
 618     (save-excursion
 619       (beginning-of-line)
 620       (bury-buffer (Buffer-menu-buffer t))
 621       (let ((line (buffer-substring (point) (progn (forward-line 1) (point))))
 622             (inhibit-read-only t))
 623         (delete-region (point) (progn (forward-line -1) (point)))
 624         (goto-char (point-max))
 625         (insert line))
 626       (message "Buried buffer moved to the end"))))
 627
 628
 629 (defun Buffer-menu-view ()
 630   "View this line's buffer in View mode."
 631   (interactive)
 632   (view-buffer (Buffer-menu-buffer t)))
 633
 634
 635 (defun Buffer-menu-view-other-window ()
 636   "View this line's buffer in View mode in another window."
 637   (interactive)
 638   (view-buffer-other-window (Buffer-menu-buffer t)))
 639 \f
 640
 641 (define-key ctl-x-map "\C-b" 'list-buffers)
 642
 643 (defun list-buffers (&optional files-only)
 644   "Display a list of names of existing buffers.
 645 The list is displayed in a buffer named `*Buffer List*'.
 646 Note that buffers with names starting with spaces are omitted.
 647 Non-null optional arg FILES-ONLY means mention only file buffers.
 648
 649 For more information, see the function `buffer-menu'."
 650   (interactive "P")
 651   (display-buffer (list-buffers-noselect files-only)))
 652
 653 (defconst Buffer-menu-short-ellipsis
 654   ;; This file is preloaded, so we can't use char-displayable-p here
 655   ;; because we don't know yet what display we're going to connect to.
 656   ":" ;; (if (char-displayable-p ?…) "…" ":")
 657   )
 658
 659 (defun Buffer-menu-buffer+size (name size &optional name-props size-props)
 660   (if (> (+ (string-width name) (string-width size) 2)
 661          Buffer-menu-buffer+size-width)
 662       (setq name
 663             (let ((tail
 664                    (if (string-match "<[0-9]+>$" name)
 665                        (match-string 0 name)
 666                      "")))
 667               (concat (truncate-string-to-width
 668                        name
 669                        (- Buffer-menu-buffer+size-width
 670                           (max (string-width size) 3)
 671                           (string-width tail)
 672                           2))
 673                       Buffer-menu-short-ellipsis
 674                       tail)))
 675     ;; Don't put properties on (buffer-name).
 676     (setq name (copy-sequence name)))
 677   (add-text-properties 0 (length name) name-props name)
 678   (add-text-properties 0 (length size) size-props size)
 679   (concat name
 680           (make-string (- Buffer-menu-buffer+size-width
 681                           (string-width name)
 682                           (string-width size))
 683                        ?\s)
 684           size))
 685
 686 (defun Buffer-menu-sort (column)
 687   "Sort the buffer menu by COLUMN."
 688   (interactive "P")
 689   (when column
 690     (setq column (prefix-numeric-value column))
 691     (if (< column 2) (setq column 2))
 692     (if (> column 5) (setq column 5)))
 693   (setq Buffer-menu-sort-column column)
 694   (let ((inhibit-read-only t) l buf m1 m2)
 695     (save-excursion
 696       (Buffer-menu-beginning)
 697       (while (not (eobp))
 698         (when (buffer-live-p (setq buf (get-text-property (+ (point) 4) 'buffer)))
 699           (setq m1 (char-after)
 700                 m1 (if (memq m1 '(?> ?D)) m1)
 701                 m2 (char-after (+ (point) 2))
 702                 m2 (if (eq m2 ?S) m2))
 703           (if (or m1 m2)
 704               (push (list buf m1 m2) l)))
 705         (forward-line)))
 706     (revert-buffer)
 707     (save-excursion
 708       (Buffer-menu-beginning)
 709       (while (not (eobp))
 710         (when (setq buf (assq (get-text-property (+ (point) 4) 'buffer) l))
 711           (setq m1 (cadr buf)
 712                 m2 (cadr (cdr buf)))
 713           (when m1
 714             (delete-char 1)
 715             (insert m1)
 716             (backward-char 1))
 717           (when m2
 718             (forward-char 2)
 719             (delete-char 1)
 720             (insert m2)))
 721         (forward-line)))))
 722
 723 (defun Buffer-menu-sort-by-column (&optional e)
 724   "Sort the buffer menu by the column clicked on."
 725   (interactive (list last-input-event))
 726   (if e (mouse-select-window e))
 727   (let* ((pos (event-start e))
 728          (obj (posn-object pos))
 729          (col (if obj
 730                   (get-text-property (cdr obj) 'column (car obj))
 731                 (get-text-property (posn-point pos) 'column))))
 732     (Buffer-menu-sort col)))
 733
 734 (defvar Buffer-menu-sort-button-map
 735   (let ((map (make-sparse-keymap)))
 736     ;; This keymap handles both nil and non-nil values for
 737     ;; Buffer-menu-use-header-line.
 738     (define-key map [header-line mouse-1] 'Buffer-menu-sort-by-column)
 739     (define-key map [header-line mouse-2] 'Buffer-menu-sort-by-column)
 740     (define-key map [mouse-2] 'Buffer-menu-sort-by-column)
 741     (define-key map [follow-link] 'mouse-face)
 742     (define-key map "\C-m" 'Buffer-menu-sort-by-column)
 743     map)
 744   "Local keymap for Buffer menu sort buttons.")
 745
 746 (defun Buffer-menu-make-sort-button (name column)
 747   (if (equal column Buffer-menu-sort-column) (setq column nil))
 748   (propertize name
 749               'column column
 750               'help-echo (concat
 751                           (if Buffer-menu-use-header-line
 752                               "mouse-1, mouse-2: sort by "
 753                             "mouse-2, RET: sort by ")
 754                           (if column (downcase name) "visited order"))
 755               'mouse-face 'highlight
 756               'keymap Buffer-menu-sort-button-map))
 757
 758 (defun list-buffers-noselect (&optional files-only buffer-list)
 759   "Create and return a buffer with a list of names of existing buffers.
 760 The buffer is named `*Buffer List*'.
 761 Note that buffers with names starting with spaces are omitted.
 762 Non-null optional arg FILES-ONLY means mention only file buffers.
 763
 764 If BUFFER-LIST is non-nil, it should be a list of buffers;
 765 it means list those buffers and no others.
 766
 767 For more information, see the function `buffer-menu'."
 768   (let* ((old-buffer (current-buffer))
 769          (standard-output standard-output)
 770          (mode-end (make-string (- Buffer-menu-mode-width 2) ?\s))
 771          (header (concat "CRM "
 772                          (Buffer-menu-buffer+size
 773                           (Buffer-menu-make-sort-button "Buffer" 2)
 774                           (Buffer-menu-make-sort-button "Size" 3))
 775                          "  "
 776                          (Buffer-menu-make-sort-button "Mode" 4) mode-end
 777                          (Buffer-menu-make-sort-button "File" 5) "\n"))
 778          list desired-point)
 779     (when Buffer-menu-use-header-line
 780       (let ((pos 0))
 781         ;; Turn whitespace chars in the header into stretch specs so
 782         ;; they work regardless of the header-line face.
 783         (while (string-match "[ \t\n]+" header pos)
 784           (setq pos (match-end 0))
 785           (put-text-property (match-beginning 0) pos 'display
 786                              ;; Assume fixed-size chars in the buffer.
 787                              (list 'space :align-to pos)
 788                              header)))
 789       ;; Try to better align the one-char headers.
 790       (put-text-property 0 3 'face 'fixed-pitch header)
 791       ;; Add a "dummy" leading space to align the beginning of the header
 792       ;; line with the beginning of the text (rather than with the left
 793       ;; scrollbar or the left fringe).  --Stef
 794       (setq header (concat (propertize " " 'display '(space :align-to 0))
 795                            header)))
 796     (with-current-buffer (get-buffer-create "*Buffer List*")
 797       (setq buffer-read-only nil)
 798       (erase-buffer)
 799       (setq standard-output (current-buffer))
 800       (unless Buffer-menu-use-header-line
 801         ;; Use U+2014 (EM DASH) to underline if possible, else use ASCII
 802         ;; (i.e. U+002D, HYPHEN-MINUS).
 803         (let ((underline (if (char-displayable-p ?\u2014) ?\u2014 ?-)))
 804           (insert header
 805                   (apply 'string
 806                          (mapcar (lambda (c)
 807                                    (if (memq c '(?\n ?\s)) c underline))
 808                                  header)))))
 809       ;; Collect info for every buffer we're interested in.
 810       (dolist (buffer (or buffer-list
 811                           (buffer-list
 812                            (when Buffer-menu-use-frame-buffer-list
 813                              (selected-frame)))))
 814         (with-current-buffer buffer
 815           (let ((name (buffer-name))
 816                 (file buffer-file-name))
 817             (unless (and (not buffer-list)
 818                          (or
 819                           ;; Don't mention internal buffers.
 820                           (and (string= (substring name 0 1) " ") (null file))
 821                           ;; Maybe don't mention buffers without files.
 822                           (and files-only (not file))
 823                           (string= name "*Buffer List*")))
 824               ;; Otherwise output info.
 825               (let ((mode (concat (format-mode-line mode-name nil nil buffer)
 826                                   (if mode-line-process
 827                                       (format-mode-line mode-line-process
 828                                                         nil nil buffer))))
 829                     (bits (string
 830                            (if (eq buffer old-buffer) ?. ?\s)
 831                            ;; Handle readonly status.  The output buffer
 832                            ;; is special cased to appear readonly; it is
 833                            ;; actually made so at a later date.
 834                            (if (or (eq buffer standard-output)
 835                                    buffer-read-only)
 836                                ?% ?\s)
 837                            ;; Identify modified buffers.
 838                            (if (buffer-modified-p) ?* ?\s)
 839                            ;; Space separator.
 840                            ?\s)))
 841                 (unless file
 842                   ;; No visited file.  Check local value of
 843                   ;; list-buffers-directory and, for Info buffers,
 844                   ;; Info-current-file.
 845                   (cond ((and (boundp 'list-buffers-directory)
 846                               list-buffers-directory)
 847                          (setq file list-buffers-directory))
 848                         ((eq major-mode 'Info-mode)
 849                          (setq file Info-current-file)
 850                          (cond
 851                           ((equal file "dir")
 852                            (setq file "*Info Directory*"))
 853                           ((eq file 'apropos)
 854                            (setq file "*Info Apropos*"))
 855                           ((eq file 'history)
 856                            (setq file "*Info History*"))
 857                           ((eq file 'toc)
 858                            (setq file "*Info TOC*"))
 859                           ((not (stringp file))  ;; avoid errors
 860                            (setq file nil))
 861                           (t
 862                            (setq file (concat "("
 863                                               (file-name-nondirectory file)
 864                                               ") "
 865                                               Info-current-node)))))))
 866                 (push (list buffer bits name (buffer-size) mode file)
 867                       list))))))
 868       ;; Preserve the original buffer-list ordering, just in case.
 869       (setq list (nreverse list))
 870       ;; Place the buffers's info in the output buffer, sorted if necessary.
 871       (dolist (buffer
 872                (if Buffer-menu-sort-column
 873                    (sort list
 874                          (if (eq Buffer-menu-sort-column 3)
 875                              (lambda (a b)
 876                                (< (nth Buffer-menu-sort-column a)
 877                                   (nth Buffer-menu-sort-column b)))
 878                            (lambda (a b)
 879                              (string< (nth Buffer-menu-sort-column a)
 880                                       (nth Buffer-menu-sort-column b)))))
 881                  list))
 882         (if (eq (car buffer) old-buffer)
 883             (setq desired-point (point)))
 884         (insert (cadr buffer)
 885                 ;; Put the buffer name into a text property
 886                 ;; so we don't have to extract it from the text.
 887                 ;; This way we avoid problems with unusual buffer names.
 888                 (let ((name (nth 2 buffer))
 889                       (size (int-to-string (nth 3 buffer))))
 890                       (Buffer-menu-buffer+size name size
 891                          `(buffer-name ,name
 892                                        buffer ,(car buffer)
 893                                        font-lock-face buffer-menu-buffer
 894                                        mouse-face highlight
 895                                        help-echo
 896                                        ,(if (>= (length name)
 897                                                 (- Buffer-menu-buffer+size-width
 898                                                    (max (length size) 3)
 899                                                    2))
 900                                             name
 901                                           "mouse-2: select this buffer"))))
 902                 "  "
 903                 (if (> (string-width (nth 4 buffer)) Buffer-menu-mode-width)
 904                     (truncate-string-to-width (nth 4 buffer)
 905                                               Buffer-menu-mode-width)
 906                   (nth 4 buffer)))
 907         (when (nth 5 buffer)
 908           (indent-to (+ Buffer-menu-buffer-column Buffer-menu-buffer+size-width
 909                         Buffer-menu-mode-width 4) 1)
 910           (princ (abbreviate-file-name (nth 5 buffer))))
 911         (princ "\n"))
 912       (Buffer-menu-mode)
 913       (when Buffer-menu-use-header-line
 914         (setq header-line-format header))
 915       ;; DESIRED-POINT doesn't have to be set; it is not when the
 916       ;; current buffer is not displayed for some reason.
 917       (and desired-point
 918            (goto-char desired-point))
 919       (setq Buffer-menu-files-only files-only)
 920       (set-buffer-modified-p nil)
 921       (current-buffer))))
 922
 923 ;; arch-tag: e7dfcfc9-6cb2-46e4-bf55-8ef1936d83c6
 924 ;;; buff-menu.el ends here