lisp/buff-menu.el

   1 ;;; buff-menu.el --- buffer menu main function and support functions.
   2
   3 ;; Copyright (C) 1985, 86, 87, 93, 94, 95, 2000 Free Software Foundation, Inc.
   4
   5 ;; Maintainer: FSF
   6
   7 ;; This file is part of GNU Emacs.
   8
   9 ;; GNU Emacs is free software; you can redistribute it and/or modify
  10 ;; it under the terms of the GNU General Public License as published by
  11 ;; the Free Software Foundation; either version 2, or (at your option)
  12 ;; any later version.
  13
  14 ;; GNU Emacs is distributed in the hope that it will be useful,
  15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 ;; GNU General Public License for more details.
  18
  19 ;; You should have received a copy of the GNU General Public License
  20 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  22 ;; Boston, MA 02111-1307, USA.
  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 `Buffer-menu-mode',
  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 (defvar Buffer-menu-buffer-column nil)
  66
  67 (defvar Buffer-menu-mode-map nil "")
  68
  69 (if Buffer-menu-mode-map
  70     ()
  71   (setq Buffer-menu-mode-map (make-keymap))
  72   (suppress-keymap Buffer-menu-mode-map t)
  73   (define-key Buffer-menu-mode-map "q" 'quit-window)
  74   (define-key Buffer-menu-mode-map "v" 'Buffer-menu-select)
  75   (define-key Buffer-menu-mode-map "2" 'Buffer-menu-2-window)
  76   (define-key Buffer-menu-mode-map "1" 'Buffer-menu-1-window)
  77   (define-key Buffer-menu-mode-map "f" 'Buffer-menu-this-window)
  78   (define-key Buffer-menu-mode-map "e" 'Buffer-menu-this-window)
  79   (define-key Buffer-menu-mode-map "\C-m" 'Buffer-menu-this-window)
  80   (define-key Buffer-menu-mode-map "o" 'Buffer-menu-other-window)
  81   (define-key Buffer-menu-mode-map "\C-o" 'Buffer-menu-switch-other-window)
  82   (define-key Buffer-menu-mode-map "s" 'Buffer-menu-save)
  83   (define-key Buffer-menu-mode-map "d" 'Buffer-menu-delete)
  84   (define-key Buffer-menu-mode-map "k" 'Buffer-menu-delete)
  85   (define-key Buffer-menu-mode-map "\C-d" 'Buffer-menu-delete-backwards)
  86   (define-key Buffer-menu-mode-map "\C-k" 'Buffer-menu-delete)
  87   (define-key Buffer-menu-mode-map "x" 'Buffer-menu-execute)
  88   (define-key Buffer-menu-mode-map " " 'next-line)
  89   (define-key Buffer-menu-mode-map "n" 'next-line)
  90   (define-key Buffer-menu-mode-map "p" 'previous-line)
  91   (define-key Buffer-menu-mode-map "\177" 'Buffer-menu-backup-unmark)
  92   (define-key Buffer-menu-mode-map "~" 'Buffer-menu-not-modified)
  93   (define-key Buffer-menu-mode-map "?" 'describe-mode)
  94   (define-key Buffer-menu-mode-map "u" 'Buffer-menu-unmark)
  95   (define-key Buffer-menu-mode-map "m" 'Buffer-menu-mark)
  96   (define-key Buffer-menu-mode-map "t" 'Buffer-menu-visit-tags-table)
  97   (define-key Buffer-menu-mode-map "%" 'Buffer-menu-toggle-read-only)
  98   (define-key Buffer-menu-mode-map "b" 'Buffer-menu-bury)
  99   (define-key Buffer-menu-mode-map "g" 'Buffer-menu-revert)
 100   (define-key Buffer-menu-mode-map "V" 'Buffer-menu-view)
 101   (define-key Buffer-menu-mode-map [mouse-2] 'Buffer-menu-mouse-select)
 102 )
 103
 104 ;; Buffer Menu mode is suitable only for specially formatted data.
 105 (put 'Buffer-menu-mode 'mode-class 'special)
 106
 107 (defun Buffer-menu-mode ()
 108   "Major mode for editing a list of buffers.
 109 Each line describes one of the buffers in Emacs.
 110 Letters do not insert themselves; instead, they are commands.
 111 \\<Buffer-menu-mode-map>
 112 \\[Buffer-menu-mouse-select] -- select buffer you click on, in place of the buffer menu.
 113 \\[Buffer-menu-this-window] -- select current line's buffer in place of the buffer menu.
 114 \\[Buffer-menu-other-window] -- select that buffer in another window,
 115   so the buffer menu buffer remains visible in its window.
 116 \\[Buffer-menu-view] -- select current line's buffer, but in view-mode.
 117 \\[Buffer-menu-view-other-window] -- select that buffer in
 118   another window, in view-mode.
 119 \\[Buffer-menu-switch-other-window] -- make another window display that buffer.
 120 \\[Buffer-menu-mark] -- mark current line's buffer to be displayed.
 121 \\[Buffer-menu-select] -- select current line's buffer.
 122   Also show buffers marked with m, in other windows.
 123 \\[Buffer-menu-1-window] -- select that buffer in full-frame window.
 124 \\[Buffer-menu-2-window] -- select that buffer in one window,
 125   together with buffer selected before this one in another window.
 126 \\[Buffer-menu-visit-tags-table] -- visit-tags-table this buffer.
 127 \\[Buffer-menu-not-modified] -- clear modified-flag on that buffer.
 128 \\[Buffer-menu-save] -- mark that buffer to be saved, and move down.
 129 \\[Buffer-menu-delete] -- mark that buffer to be deleted, and move down.
 130 \\[Buffer-menu-delete-backwards] -- mark that buffer to be deleted, and move up.
 131 \\[Buffer-menu-execute] -- delete or save marked buffers.
 132 \\[Buffer-menu-unmark] -- remove all kinds of marks from current line.
 133   With prefix argument, also move up one line.
 134 \\[Buffer-menu-backup-unmark] -- back up a line and remove marks.
 135 \\[Buffer-menu-toggle-read-only] -- toggle read-only status of buffer on this line.
 136 \\[Buffer-menu-revert] -- update the list of buffers.
 137 \\[Buffer-menu-bury] -- bury the buffer listed on this line."
 138   (kill-all-local-variables)
 139   (use-local-map Buffer-menu-mode-map)
 140   (setq major-mode 'Buffer-menu-mode)
 141   (setq mode-name "Buffer Menu")
 142   (make-local-variable 'revert-buffer-function)
 143   (setq revert-buffer-function 'Buffer-menu-revert-function)
 144   (setq truncate-lines t)
 145   (setq buffer-read-only t)
 146   (run-hooks 'buffer-menu-mode-hook))
 147
 148 (defun Buffer-menu-revert ()
 149   "Update the list of buffers."
 150   (interactive)
 151   (revert-buffer))
 152
 153 (defun Buffer-menu-revert-function (ignore1 ignore2)
 154   (list-buffers))
 155 \f
 156 (defun Buffer-menu-buffer (error-if-non-existent-p)
 157   "Return buffer described by this line of buffer menu."
 158   (let* ((where (save-excursion
 159                   (beginning-of-line)
 160                   (+ (point) Buffer-menu-buffer-column)))
 161          (name (and (not (eobp)) (get-text-property where 'buffer-name)))
 162          (buf (and (not (eobp)) (get-text-property where 'buffer))))
 163     (if name
 164         (or (get-buffer name)
 165             (and buf (buffer-name buf) buf)
 166             (if error-if-non-existent-p
 167                 (error "No buffer named `%s'" name)
 168               nil))
 169       (or (and buf (buffer-name buf) buf)
 170       (if error-if-non-existent-p
 171           (error "No buffer on this line")
 172             nil)))))
 173 \f
 174 (defun buffer-menu (&optional arg)
 175   "Make a menu of buffers so you can save, delete or select them.
 176 With argument, show only buffers that are visiting files.
 177 Type ? after invocation to get help on commands available.
 178 Type q immediately to make the buffer menu go away."
 179   (interactive "P")
 180 ;;;  (setq Buffer-menu-window-config (current-window-configuration))
 181   (switch-to-buffer (list-buffers-noselect arg))
 182   (message
 183    "Commands: d, s, x, u; f, o, 1, 2, m, v; ~, %%; q to quit; ? for help."))
 184
 185 (defun buffer-menu-other-window (&optional arg)
 186   "Display a list of buffers in another window.
 187 With the buffer list buffer, you can save, delete or select the buffers.
 188 With argument, show only buffers that are visiting files.
 189 Type ? after invocation to get help on commands available.
 190 Type q immediately to make the buffer menu go away."
 191   (interactive "P")
 192 ;;;  (setq Buffer-menu-window-config (current-window-configuration))
 193   (switch-to-buffer-other-window (list-buffers-noselect arg))
 194   (message
 195    "Commands: d, s, x, u; f, o, 1, 2, m, v; ~, %%; q to quit; ? for help."))
 196
 197 (defun Buffer-menu-mark ()
 198   "Mark buffer on this line for being displayed by \\<Buffer-menu-mode-map>\\[Buffer-menu-select] command."
 199   (interactive)
 200   (beginning-of-line)
 201   (if (looking-at " [-M]")
 202       (ding)
 203     (let ((buffer-read-only nil))
 204       (delete-char 1)
 205       (insert ?>)
 206       (forward-line 1))))
 207
 208 (defun Buffer-menu-unmark (&optional backup)
 209   "Cancel all requested operations on buffer on this line and move down.
 210 Optional ARG means move up."
 211   (interactive "P")
 212   (beginning-of-line)
 213   (if (looking-at " [-M]")
 214       (ding)
 215     (let* ((buf (Buffer-menu-buffer t))
 216            (mod (buffer-modified-p buf))
 217            (readonly (save-excursion (set-buffer buf) buffer-read-only))
 218            (buffer-read-only nil))
 219       (delete-char 3)
 220       (insert (if readonly (if mod " *%" "  %") (if mod " * " "   ")))))
 221   (forward-line (if backup -1 1)))
 222
 223 (defun Buffer-menu-backup-unmark ()
 224   "Move up and cancel all requested operations on buffer on line above."
 225   (interactive)
 226   (forward-line -1)
 227   (Buffer-menu-unmark)
 228   (forward-line -1))
 229
 230 (defun Buffer-menu-delete (&optional arg)
 231   "Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command.
 232 Prefix arg is how many buffers to delete.
 233 Negative arg means delete backwards."
 234   (interactive "p")
 235   (beginning-of-line)
 236   (if (looking-at " [-M]")              ;header lines
 237       (ding)
 238     (let ((buffer-read-only nil))
 239       (if (or (null arg) (= arg 0))
 240           (setq arg 1))
 241       (while (> arg 0)
 242         (delete-char 1)
 243         (insert ?D)
 244         (forward-line 1)
 245         (setq arg (1- arg)))
 246       (while (< arg 0)
 247         (delete-char 1)
 248         (insert ?D)
 249         (forward-line -1)
 250         (setq arg (1+ arg))))))
 251
 252 (defun Buffer-menu-delete-backwards (&optional arg)
 253   "Mark buffer on this line to be deleted by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command
 254 and then move up one line.  Prefix arg means move that many lines."
 255   (interactive "p")
 256   (Buffer-menu-delete (- (or arg 1)))
 257   (while (looking-at " [-M]")
 258     (forward-line 1)))
 259
 260 (defun Buffer-menu-save ()
 261   "Mark buffer on this line to be saved by \\<Buffer-menu-mode-map>\\[Buffer-menu-execute] command."
 262   (interactive)
 263   (beginning-of-line)
 264   (if (looking-at " [-M]")              ;header lines
 265       (ding)
 266     (let ((buffer-read-only nil))
 267       (forward-char 1)
 268       (delete-char 1)
 269       (insert ?S)
 270       (forward-line 1))))
 271
 272 (defun Buffer-menu-not-modified (&optional arg)
 273   "Mark buffer on this line as unmodified (no changes to save)."
 274   (interactive "P")
 275   (save-excursion
 276     (set-buffer (Buffer-menu-buffer t))
 277     (set-buffer-modified-p arg))
 278   (save-excursion
 279    (beginning-of-line)
 280    (forward-char 1)
 281    (if (= (char-after (point)) (if arg ?  ?*))
 282        (let ((buffer-read-only nil))
 283          (delete-char 1)
 284          (insert (if arg ?* ? ))))))
 285
 286 (defun Buffer-menu-execute ()
 287   "Save and/or delete buffers marked with \\<Buffer-menu-mode-map>\\[Buffer-menu-save] or \\<Buffer-menu-mode-map>\\[Buffer-menu-delete] commands."
 288   (interactive)
 289   (save-excursion
 290     (goto-char (point-min))
 291     (forward-line 1)
 292     (while (re-search-forward "^.S" nil t)
 293       (let ((modp nil))
 294         (save-excursion
 295           (set-buffer (Buffer-menu-buffer t))
 296           (save-buffer)
 297           (setq modp (buffer-modified-p)))
 298         (let ((buffer-read-only nil))
 299           (delete-char -1)
 300           (insert (if modp ?* ? ))))))
 301   (save-excursion
 302     (goto-char (point-min))
 303     (forward-line 1)
 304     (let ((buff-menu-buffer (current-buffer))
 305           (buffer-read-only nil))
 306       (while (search-forward "\nD" nil t)
 307         (forward-char -1)
 308         (let ((buf (Buffer-menu-buffer nil)))
 309           (or (eq buf nil)
 310               (eq buf buff-menu-buffer)
 311               (save-excursion (kill-buffer buf)))
 312           (if (and buf (buffer-name buf))
 313             (progn (delete-char 1)
 314                    (insert ? ))
 315           (delete-region (point) (progn (forward-line 1) (point)))
 316             (forward-char -1)))))))
 317
 318 (defun Buffer-menu-select ()
 319   "Select this line's buffer; also display buffers marked with `>'.
 320 You can mark buffers with the \\<Buffer-menu-mode-map>\\[Buffer-menu-mark] command.
 321 This command deletes and replaces all the previously existing windows
 322 in the selected frame."
 323   (interactive)
 324   (let ((buff (Buffer-menu-buffer t))
 325         (menu (current-buffer))
 326         (others ())
 327         tem)
 328     (goto-char (point-min))
 329     (while (search-forward "\n>" nil t)
 330       (setq tem (Buffer-menu-buffer t))
 331       (let ((buffer-read-only nil))
 332         (delete-char -1)
 333         (insert ?\ ))
 334       (or (eq tem buff) (memq tem others) (setq others (cons tem others))))
 335     (setq others (nreverse others)
 336           tem (/ (1- (frame-height)) (1+ (length others))))
 337     (delete-other-windows)
 338     (switch-to-buffer buff)
 339     (or (eq menu buff)
 340         (bury-buffer menu))
 341     (if (equal (length others) 0)
 342         (progn
 343 ;;;       ;; Restore previous window configuration before displaying
 344 ;;;       ;; selected buffers.
 345 ;;;       (if Buffer-menu-window-config
 346 ;;;           (progn
 347 ;;;             (set-window-configuration Buffer-menu-window-config)
 348 ;;;             (setq Buffer-menu-window-config nil)))
 349           (switch-to-buffer buff))
 350       (while others
 351         (split-window nil tem)
 352         (other-window 1)
 353         (switch-to-buffer (car others))
 354         (setq others (cdr others)))
 355       (other-window 1)                          ;back to the beginning!
 356 )))
 357
 358
 359 \f
 360 (defun Buffer-menu-visit-tags-table ()
 361   "Visit the tags table in the buffer on this line.  See `visit-tags-table'."
 362   (interactive)
 363   (let ((file (buffer-file-name (Buffer-menu-buffer t))))
 364     (if file
 365         (visit-tags-table file)
 366       (error "Specified buffer has no file"))))
 367
 368 (defun Buffer-menu-1-window ()
 369   "Select this line's buffer, alone, in full frame."
 370   (interactive)
 371   (switch-to-buffer (Buffer-menu-buffer t))
 372   (bury-buffer (other-buffer))
 373   (delete-other-windows))
 374
 375 (defun Buffer-menu-mouse-select (event)
 376   "Select the buffer whose line you click on."
 377   (interactive "e")
 378   (let (buffer)
 379     (save-excursion
 380       (set-buffer (window-buffer (posn-window (event-end event))))
 381       (save-excursion
 382         (goto-char (posn-point (event-end event)))
 383         (setq buffer (Buffer-menu-buffer t))))
 384     (select-window (posn-window (event-end event)))
 385     (if (and (window-dedicated-p (selected-window))
 386              (eq (selected-window) (frame-root-window)))
 387         (switch-to-buffer-other-frame buffer)
 388       (switch-to-buffer buffer))))
 389
 390 (defun Buffer-menu-this-window ()
 391   "Select this line's buffer in this window."
 392   (interactive)
 393   (switch-to-buffer (Buffer-menu-buffer t)))
 394
 395 (defun Buffer-menu-other-window ()
 396   "Select this line's buffer in other window, leaving buffer menu visible."
 397   (interactive)
 398   (switch-to-buffer-other-window (Buffer-menu-buffer t)))
 399
 400 (defun Buffer-menu-switch-other-window ()
 401   "Make the other window select this line's buffer.
 402 The current window remains selected."
 403   (interactive)
 404   (display-buffer (Buffer-menu-buffer t)))
 405
 406 (defun Buffer-menu-2-window ()
 407   "Select this line's buffer, with previous buffer in second window."
 408   (interactive)
 409   (let ((buff (Buffer-menu-buffer t))
 410         (menu (current-buffer))
 411         (pop-up-windows t))
 412     (delete-other-windows)
 413     (switch-to-buffer (other-buffer))
 414     (pop-to-buffer buff)
 415     (bury-buffer menu)))
 416
 417 (defun Buffer-menu-toggle-read-only ()
 418   "Toggle read-only status of buffer on this line, perhaps via version control."
 419   (interactive)
 420   (let (char)
 421     (save-excursion
 422       (set-buffer (Buffer-menu-buffer t))
 423       (vc-toggle-read-only)
 424       (setq char (if buffer-read-only ?% ? )))
 425     (save-excursion
 426       (beginning-of-line)
 427       (forward-char 2)
 428       (if (/= (following-char) char)
 429           (let (buffer-read-only)
 430             (delete-char 1)
 431             (insert char))))))
 432
 433 (defun Buffer-menu-bury ()
 434   "Bury the buffer listed on this line."
 435   (interactive)
 436   (beginning-of-line)
 437   (if (looking-at " [-M]")              ;header lines
 438       (ding)
 439     (save-excursion
 440       (beginning-of-line)
 441       (bury-buffer (Buffer-menu-buffer t))
 442       (let ((line (buffer-substring (point) (progn (forward-line 1) (point))))
 443             (buffer-read-only nil))
 444         (delete-region (point) (progn (forward-line -1) (point)))
 445         (goto-char (point-max))
 446         (insert line))
 447       (message "Buried buffer moved to the end"))))
 448
 449
 450 (defun Buffer-menu-view ()
 451   "View this line's buffer in View mode."
 452   (interactive)
 453   (view-buffer (Buffer-menu-buffer t)))
 454
 455
 456 (defun Buffer-menu-view-other-window ()
 457   "View this line's buffer in View mode in another window."
 458   (interactive)
 459   (view-buffer-other-window (Buffer-menu-buffer t)))
 460 \f
 461
 462 (define-key ctl-x-map "\C-b" 'list-buffers)
 463
 464 (defun list-buffers (&optional files-only)
 465   "Display a list of names of existing buffers.
 466 The list is displayed in a buffer named `*Buffer List*'.
 467 Note that buffers with names starting with spaces are omitted.
 468 Non-null optional arg FILES-ONLY means mention only file buffers.
 469
 470 The M column contains a * for buffers that are modified.
 471 The R column contains a % for buffers that are read-only."
 472   (interactive "P")
 473   (display-buffer (list-buffers-noselect files-only)))
 474
 475 (defun list-buffers-noselect (&optional files-only)
 476   "Create and return a buffer with a list of names of existing buffers.
 477 The buffer is named `*Buffer List*'.
 478 Note that buffers with names starting with spaces are omitted.
 479 Non-null optional arg FILES-ONLY means mention only file buffers.
 480
 481 The M column contains a * for buffers that are modified.
 482 The R column contains a % for buffers that are read-only."
 483   (let ((old-buffer (current-buffer))
 484         (standard-output standard-output)
 485         desired-point)
 486     (save-excursion
 487       (set-buffer (get-buffer-create "*Buffer List*"))
 488       (setq buffer-read-only nil)
 489       (erase-buffer)
 490       (setq standard-output (current-buffer))
 491       (princ "\
 492  MR Buffer           Size  Mode         File
 493  -- ------           ----  ----         ----
 494 ")
 495       ;; Record the column where buffer names start.
 496       (setq Buffer-menu-buffer-column 4)
 497       (dolist (buffer (buffer-list))
 498         (let ((name (buffer-name buffer))
 499               (file (buffer-file-name buffer))
 500               this-buffer-line-start
 501               this-buffer-read-only
 502               (this-buffer-size (buffer-size buffer))
 503               this-buffer-mode-name
 504               this-buffer-directory)
 505           (with-current-buffer buffer
 506             (setq this-buffer-read-only buffer-read-only
 507                   this-buffer-mode-name mode-name)
 508             (unless file
 509               ;; No visited file.  Check local value of
 510               ;; list-buffers-directory.
 511               (when (and (boundp 'list-buffers-directory)
 512                          list-buffers-directory)
 513                 (setq this-buffer-directory list-buffers-directory))))
 514           (cond
 515             ;; Don't mention internal buffers.
 516             ((string= (substring name 0 1) " "))
 517             ;; Maybe don't mention buffers without files.
 518             ((and files-only (not file)))
 519             ((string= name "*Buffer List*"))
 520             ;; Otherwise output info.
 521             (t
 522              (setq this-buffer-line-start (point))
 523              ;; Identify current buffer.
 524              (if (eq buffer old-buffer)
 525                  (progn
 526                    (setq desired-point (point))
 527                    (princ "."))
 528                (princ " "))
 529              ;; Identify modified buffers.
 530              (princ (if (buffer-modified-p buffer) "*" " "))
 531              ;; Handle readonly status.  The output buffer is special
 532              ;; cased to appear readonly; it is actually made so at a
 533              ;; later date.
 534              (princ (if (or (eq buffer standard-output)
 535                             this-buffer-read-only)
 536                         "% "
 537                       "  "))
 538              (princ name)
 539              ;; Put the buffer name into a text property
 540              ;; so we don't have to extract it from the text.
 541              ;; This way we avoid problems with unusual buffer names.
 542              (setq this-buffer-line-start
 543                    (+ this-buffer-line-start Buffer-menu-buffer-column))
 544              (let ((name-end (point)))
 545                (indent-to 17 2)
 546                (put-text-property this-buffer-line-start name-end
 547                                   'buffer-name name)
 548                (put-text-property this-buffer-line-start (point)
 549                                   'buffer buffer)
 550                (put-text-property this-buffer-line-start name-end
 551                                   'mouse-face 'highlight))
 552              (let ((size (format "%8d" this-buffer-size))
 553                    (mode this-buffer-mode-name)
 554                    (excess (- (current-column) 17)))
 555                (while (and (> excess 0) (= (aref size 0) ?\ ))
 556                  (setq size (substring size 1)
 557                        excess (1- excess)))
 558                (princ size)
 559                (indent-to 27 1)
 560                (princ mode))
 561              (indent-to 40 1)
 562              (or file (setq file this-buffer-directory))
 563              (when file
 564                (princ (abbreviate-file-name file)))
 565              (princ "\n")))))
 566       (Buffer-menu-mode)
 567       ;; DESIRED-POINT doesn't have to be set; it is not when the
 568       ;; current buffer is not displayed for some reason.
 569       (and desired-point
 570            (goto-char desired-point))
 571       (current-buffer))))
 572
 573 ;;; buff-menu.el ends here