lisp/frame.el

   1 ;;; frame.el --- multi-frame management independent of window systems.
   2
   3 ;; Copyright (C) 1993, 1994, 1996, 1997, 2000 Free Software Foundation, Inc.
   4
   5 ;; Maintainer: FSF
   6 ;; Keywords: internal
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software; you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation; either version 2, or (at your option)
  13 ;; any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23 ;; Boston, MA 02111-1307, USA.
  24
  25 ;;; Code:
  26
  27 (defvar frame-creation-function nil
  28   "Window-system dependent function to call to create a new frame.
  29 The window system startup file should set this to its frame creation
  30 function, which should take an alist of parameters as its argument.")
  31
  32 ;;; The initial value given here for used to ask for a minibuffer.
  33 ;;; But that's not necessary, because the default is to have one.
  34 ;;; By not specifying it here, we let an X resource specify it.
  35 (defcustom initial-frame-alist nil
  36   "*Alist of frame parameters for creating the initial X window frame.
  37 You can set this in your `.emacs' file; for example,
  38  (setq initial-frame-alist '((top . 1) (left . 1) (width . 80) (height . 55)))
  39 Parameters specified here supersede the values given in `default-frame-alist'.
  40
  41 If the value calls for a frame without a minibuffer, and you have not created
  42 a minibuffer frame on your own, one is created according to
  43 `minibuffer-frame-alist'.
  44
  45 You can specify geometry-related options for just the initial frame
  46 by setting this variable in your `.emacs' file; however, they won't
  47 take effect until Emacs reads `.emacs', which happens after first creating
  48 the frame.  If you want the frame to have the proper geometry as soon
  49 as it appears, you need to use this three-step process:
  50 * Specify X resources to give the geometry you want.
  51 * Set `default-frame-alist' to override these options so that they
  52   don't affect subsequent frames.
  53 * Set `initial-frame-alist' in a way that matches the X resources,
  54   to override what you put in `default-frame-alist'."
  55   :type '(repeat (cons :format "%v"
  56                        (symbol :tag "Parameter")
  57                        (sexp :tag "Value")))
  58   :group 'frames)
  59
  60 (defcustom minibuffer-frame-alist '((width . 80) (height . 2))
  61   "*Alist of frame parameters for initially creating a minibuffer frame.
  62 You can set this in your `.emacs' file; for example,
  63  (setq minibuffer-frame-alist
  64    '((top . 1) (left . 1) (width . 80) (height . 2)))
  65 Parameters specified here supersede the values given in
  66 `default-frame-alist', for a minibuffer frame."
  67   :type '(repeat (cons :format "%v"
  68                        (symbol :tag "Parameter")
  69                        (sexp :tag "Value")))
  70   :group 'frames)
  71
  72 (defcustom pop-up-frame-alist nil
  73   "*Alist of frame parameters used when creating pop-up frames.
  74 Pop-up frames are used for completions, help, and the like.
  75 This variable can be set in your init file, like this:
  76   (setq pop-up-frame-alist '((width . 80) (height . 20)))
  77 These supersede the values given in `default-frame-alist',
  78 for pop-up frames."
  79   :type '(repeat (cons :format "%v"
  80                        (symbol :tag "Parameter")
  81                        (sexp :tag "Value")))
  82   :group 'frames)
  83
  84 (setq pop-up-frame-function
  85       (function (lambda ()
  86                   (make-frame pop-up-frame-alist))))
  87
  88 (defcustom special-display-frame-alist
  89   '((height . 14) (width . 80) (unsplittable . t))
  90   "*Alist of frame parameters used when creating special frames.
  91 Special frames are used for buffers whose names are in
  92 `special-display-buffer-names' and for buffers whose names match
  93 one of the regular expressions in `special-display-regexps'.
  94 This variable can be set in your init file, like this:
  95   (setq special-display-frame-alist '((width . 80) (height . 20)))
  96 These supersede the values given in `default-frame-alist'."
  97   :type '(repeat (cons :format "%v"
  98                          (symbol :tag "Parameter")
  99                          (sexp :tag "Value")))
 100   :group 'frames)
 101
 102 (defun special-display-popup-frame (buffer &optional args)
 103   "Display BUFFER in its own frame, reusing an existing window if any.
 104 Return the window chosen.
 105 Currently we do not insist on selecting the window within its frame.
 106 If ARGS is an alist, use it as a list of frame parameter specs.
 107 If ARGS is a list whose car is a symbol,
 108 use (car ARGS) as a function to do the work.
 109 Pass it BUFFER as first arg, and (cdr ARGS) gives the rest of the args."
 110   (if (and args (symbolp (car args)))
 111       (apply (car args) buffer (cdr args))
 112     (let ((window (get-buffer-window buffer t)))
 113       (if window
 114           ;; If we have a window already, make it visible.
 115           (let ((frame (window-frame window)))
 116             (make-frame-visible frame)
 117             (raise-frame frame)
 118             window)
 119         ;; If no window yet, make one in a new frame.
 120         (let ((frame (make-frame (append args special-display-frame-alist))))
 121           (set-window-buffer (frame-selected-window frame) buffer)
 122           (set-window-dedicated-p (frame-selected-window frame) t)
 123           (frame-selected-window frame))))))
 124
 125 (defun handle-delete-frame (event)
 126   "Handle delete-frame events from the X server."
 127   (interactive "e")
 128   (let ((frame (posn-window (event-start event)))
 129         (i 0)
 130         (tail (frame-list)))
 131     (while tail
 132       (and (frame-visible-p (car tail))
 133            (not (eq (car tail) frame))
 134           (setq i (1+ i)))
 135       (setq tail (cdr tail)))
 136     (if (> i 0)
 137         (delete-frame frame t)
 138       ;; Gildea@x.org says it is ok to ask questions before terminating.
 139       (save-buffers-kill-emacs))))
 140 \f
 141 ;;;; Arrangement of frames at startup
 142
 143 ;;; 1) Load the window system startup file from the lisp library and read the
 144 ;;; high-priority arguments (-q and the like).  The window system startup
 145 ;;; file should create any frames specified in the window system defaults.
 146 ;;;
 147 ;;; 2) If no frames have been opened, we open an initial text frame.
 148 ;;;
 149 ;;; 3) Once the init file is done, we apply any newly set parameters
 150 ;;; in initial-frame-alist to the frame.
 151
 152 ;; These are now called explicitly at the proper times,
 153 ;; since that is easier to understand.
 154 ;; Actually using hooks within Emacs is bad for future maintenance. --rms.
 155 ;; (add-hook 'before-init-hook 'frame-initialize)
 156 ;; (add-hook 'window-setup-hook 'frame-notice-user-settings)
 157
 158 ;;; If we create the initial frame, this is it.
 159 (defvar frame-initial-frame nil)
 160
 161 ;; Record the parameters used in frame-initialize to make the initial frame.
 162 (defvar frame-initial-frame-alist)
 163
 164 (defvar frame-initial-geometry-arguments nil)
 165
 166 ;;; startup.el calls this function before loading the user's init
 167 ;;; file - if there is no frame with a minibuffer open now, create
 168 ;;; one to display messages while loading the init file.
 169 (defun frame-initialize ()
 170   "Create an in initial frame if necessary."
 171   ;; Are we actually running under a window system at all?
 172   (if (and window-system (not noninteractive) (not (eq window-system 'pc)))
 173       (progn
 174         ;; Turn on special-display processing only if there's a window system.
 175         (setq special-display-function 'special-display-popup-frame)
 176
 177         ;; If there is no frame with a minibuffer besides the terminal
 178         ;; frame, then we need to create the opening frame.  Make sure
 179         ;; it has a minibuffer, but let initial-frame-alist omit the
 180         ;; minibuffer spec.
 181         (or (delq terminal-frame (minibuffer-frame-list))
 182             (progn
 183               (setq frame-initial-frame-alist
 184                     (append initial-frame-alist default-frame-alist nil))
 185               (or (assq 'horizontal-scroll-bars frame-initial-frame-alist)
 186                   (setq frame-initial-frame-alist
 187                         (cons '(horizontal-scroll-bars . t)
 188                               frame-initial-frame-alist)))
 189               (setq default-minibuffer-frame
 190                     (setq frame-initial-frame
 191                           (make-frame frame-initial-frame-alist)))
 192               ;; Delete any specifications for window geometry parameters
 193               ;; so that we won't reapply them in frame-notice-user-settings.
 194               ;; It would be wrong to reapply them then,
 195               ;; because that would override explicit user resizing.
 196               (setq initial-frame-alist
 197                     (frame-remove-geometry-params initial-frame-alist))))
 198         ;; At this point, we know that we have a frame open, so we
 199         ;; can delete the terminal frame.
 200         (delete-frame terminal-frame)
 201         (setq terminal-frame nil))
 202
 203     ;; No, we're not running a window system.  Use make-terminal-frame if
 204     ;; we support that feature, otherwise arrange to cause errors.
 205     (or (eq window-system 'pc)
 206         (setq frame-creation-function
 207               (if (fboundp 'tty-create-frame-with-faces)
 208                   'tty-create-frame-with-faces
 209                 (function
 210                  (lambda (parameters)
 211                    (error
 212                     "Can't create multiple frames without a window system"))))))))
 213
 214 (defvar frame-notice-user-settings t
 215   "Non-nil means function `frame-notice-user-settings' wasn't run yet.")
 216
 217 ;;; startup.el calls this function after loading the user's init
 218 ;;; file.  Now default-frame-alist and initial-frame-alist contain
 219 ;;; information to which we must react; do what needs to be done.
 220 (defun frame-notice-user-settings ()
 221   "Act on user's init file settings of frame parameters.
 222 React to settings of `default-frame-alist', `initial-frame-alist' there."
 223   ;; Make menu-bar-mode and default-frame-alist consistent.
 224   (when (boundp 'menu-bar-mode)
 225     (let ((default (assq 'menu-bar-lines default-frame-alist)))
 226       (if default
 227           (setq menu-bar-mode (not (eq (cdr default) 0)))
 228         (setq default-frame-alist
 229               (cons (cons 'menu-bar-lines (if menu-bar-mode 1 0))
 230                     default-frame-alist)))))
 231
 232   ;; Make tool-bar-mode and default-frame-alist consistent.  Don't do
 233   ;; it in batch mode since that would leave a tool-bar-lines
 234   ;; parameter in default-frame-alist in a dumped Emacs, which is not
 235   ;; what we want.  For some reason, menu-bar-mode is not bound
 236   ;; in this case, but tool-bar-mode is.
 237   (when (and (boundp 'tool-bar-mode)
 238              (not noninteractive))
 239     (let ((default (assq 'tool-bar-lines default-frame-alist)))
 240       (if default
 241           (setq tool-bar-mode (not (eq (cdr default) 0)))
 242         (setq default-frame-alist
 243               (cons (cons 'tool-bar-lines (if tool-bar-mode 1 0))
 244                     default-frame-alist)))))
 245
 246   ;; Creating and deleting frames may shift the selected frame around,
 247   ;; and thus the current buffer.  Protect against that.  We don't
 248   ;; want to use save-excursion here, because that may also try to set
 249   ;; the buffer of the selected window, which fails when the selected
 250   ;; window is the minibuffer.
 251   (let ((old-buffer (current-buffer)))
 252
 253     (when (and frame-notice-user-settings
 254                (null frame-initial-frame))
 255       ;; This case happens when we don't have a window system.
 256       (let ((parms (frame-parameters frame-initial-frame)))
 257         ;; Don't change the frame names.
 258         (setq parms (delq (assq 'name parms) parms))
 259         ;; Can't modify the minibuffer parameter, so don't try.
 260         (setq parms (delq (assq 'minibuffer parms) parms))
 261         (modify-frame-parameters nil
 262                                  (append initial-frame-alist
 263                                          default-frame-alist
 264                                          parms
 265                                          nil))))
 266
 267     ;; If the initial frame is still around, apply initial-frame-alist
 268     ;; and default-frame-alist to it.
 269     (if (frame-live-p frame-initial-frame)
 270
 271         ;; The initial frame we create above always has a minibuffer.
 272         ;; If the user wants to remove it, or make it a minibuffer-only
 273         ;; frame, then we'll have to delete the current frame and make a
 274         ;; new one; you can't remove or add a root window to/from an
 275         ;; existing frame.
 276         ;;
 277         ;; NOTE: default-frame-alist was nil when we created the
 278         ;; existing frame.  We need to explicitly include
 279         ;; default-frame-alist in the parameters of the screen we
 280         ;; create here, so that its new value, gleaned from the user's
 281         ;; .emacs file, will be applied to the existing screen.
 282         (if (not (eq (cdr (or (assq 'minibuffer initial-frame-alist)
 283                               (assq 'minibuffer default-frame-alist)
 284                               '(minibuffer . t)))
 285                      t))
 286             ;; Create the new frame.
 287             (let (parms new)
 288               ;; If the frame isn't visible yet, wait till it is.
 289               ;; If the user has to position the window,
 290               ;; Emacs doesn't know its real position until
 291               ;; the frame is seen to be visible.
 292               (while (not (cdr (assq 'visibility
 293                                      (frame-parameters frame-initial-frame))))
 294                 (sleep-for 1))
 295               (setq parms (frame-parameters frame-initial-frame))
 296               ;; Get rid of `name' unless it was specified explicitly before.
 297               (or (assq 'name frame-initial-frame-alist)
 298                   (setq parms (delq (assq 'name parms) parms)))
 299               (setq parms (append initial-frame-alist
 300                                   default-frame-alist
 301                                   parms
 302                                   nil))
 303               ;; Get rid of `reverse', because that was handled
 304               ;; when we first made the frame.
 305               (setq parms (cons '(reverse) (delq (assq 'reverse parms) parms)))
 306               (if (assq 'height frame-initial-geometry-arguments)
 307                   (setq parms (assq-delete-all 'height parms)))
 308               (if (assq 'width frame-initial-geometry-arguments)
 309                   (setq parms (assq-delete-all 'width parms)))
 310               (if (assq 'left frame-initial-geometry-arguments)
 311                   (setq parms (assq-delete-all 'left parms)))
 312               (if (assq 'top frame-initial-geometry-arguments)
 313                   (setq parms (assq-delete-all 'top parms)))
 314               (setq new
 315                     (make-frame
 316                      ;; Use the geometry args that created the existing
 317                      ;; frame, rather than the parms we get for it.
 318                      (append frame-initial-geometry-arguments
 319                              '((user-size . t) (user-position . t))
 320                              parms)))
 321               ;; The initial frame, which we are about to delete, may be
 322               ;; the only frame with a minibuffer.  If it is, create a
 323               ;; new one.
 324               (or (delq frame-initial-frame (minibuffer-frame-list))
 325                   (make-initial-minibuffer-frame nil))
 326
 327               ;; If the initial frame is serving as a surrogate
 328               ;; minibuffer frame for any frames, we need to wean them
 329               ;; onto a new frame.  The default-minibuffer-frame
 330               ;; variable must be handled similarly.
 331               (let ((users-of-initial
 332                      (filtered-frame-list
 333                       (function (lambda (frame)
 334                                   (and (not (eq frame frame-initial-frame))
 335                                        (eq (window-frame
 336                                             (minibuffer-window frame))
 337                                            frame-initial-frame)))))))
 338                 (if (or users-of-initial
 339                         (eq default-minibuffer-frame frame-initial-frame))
 340
 341                     ;; Choose an appropriate frame.  Prefer frames which
 342                     ;; are only minibuffers.
 343                     (let* ((new-surrogate
 344                             (car
 345                              (or (filtered-frame-list
 346                                   (function
 347                                    (lambda (frame)
 348                                      (eq (cdr (assq 'minibuffer
 349                                                     (frame-parameters frame)))
 350                                          'only))))
 351                                  (minibuffer-frame-list))))
 352                            (new-minibuffer (minibuffer-window new-surrogate)))
 353
 354                       (if (eq default-minibuffer-frame frame-initial-frame)
 355                           (setq default-minibuffer-frame new-surrogate))
 356
 357                       ;; Wean the frames using frame-initial-frame as
 358                       ;; their minibuffer frame.
 359                       (mapcar
 360                        (function
 361                         (lambda (frame)
 362                           (modify-frame-parameters
 363                            frame (list (cons 'minibuffer new-minibuffer)))))
 364                        users-of-initial))))
 365
 366               ;; Redirect events enqueued at this frame to the new frame.
 367               ;; Is this a good idea?
 368               (redirect-frame-focus frame-initial-frame new)
 369
 370               ;; Finally, get rid of the old frame.
 371               (delete-frame frame-initial-frame t))
 372
 373           ;; Otherwise, we don't need all that rigamarole; just apply
 374           ;; the new parameters.
 375           (let (newparms allparms tail)
 376             (setq allparms (append initial-frame-alist
 377                                    default-frame-alist nil))
 378             (if (assq 'height frame-initial-geometry-arguments)
 379                 (setq allparms (assq-delete-all 'height allparms)))
 380             (if (assq 'width frame-initial-geometry-arguments)
 381                 (setq allparms (assq-delete-all 'width allparms)))
 382             (if (assq 'left frame-initial-geometry-arguments)
 383                 (setq allparms (assq-delete-all 'left allparms)))
 384             (if (assq 'top frame-initial-geometry-arguments)
 385                 (setq allparms (assq-delete-all 'top allparms)))
 386             (setq tail allparms)
 387             ;; Find just the parms that have changed since we first
 388             ;; made this frame.  Those are the ones actually set by
 389             ;; the init file.  For those parms whose values we already knew
 390             ;; (such as those spec'd by command line options)
 391             ;; it is undesirable to specify the parm again
 392             ;; once the user has seen the frame and been able to alter it
 393             ;; manually.
 394             (while tail
 395               (let (newval oldval)
 396                 (setq oldval (assq (car (car tail))
 397                                    frame-initial-frame-alist))
 398                 (setq newval (cdr (assq (car (car tail)) allparms)))
 399                 (or (and oldval (eq (cdr oldval) newval))
 400                     (setq newparms
 401                           (cons (cons (car (car tail)) newval) newparms))))
 402               (setq tail (cdr tail)))
 403             (setq newparms (nreverse newparms))
 404             (modify-frame-parameters frame-initial-frame
 405                                      newparms)
 406             ;; If we changed the background color,
 407             ;; we need to update the background-mode parameter
 408             ;; and maybe some faces too.
 409             (when (assq 'background-color newparms)
 410               (unless (assq 'background-mode newparms)
 411                 (frame-set-background-mode frame-initial-frame))
 412               (face-set-after-frame-default frame-initial-frame)))))
 413
 414     ;; Restore the original buffer.
 415     (set-buffer old-buffer)
 416
 417     ;; Make sure the initial frame can be GC'd if it is ever deleted.
 418     ;; Make sure frame-notice-user-settings does nothing if called twice.
 419     (setq frame-notice-user-settings nil)
 420     (setq frame-initial-frame nil)))
 421
 422 (defun make-initial-minibuffer-frame (display)
 423   (let ((parms (append minibuffer-frame-alist '((minibuffer . only)))))
 424     (if display
 425         (make-frame-on-display display parms)
 426       (make-frame parms))))
 427
 428 ;;;; Creation of additional frames, and other frame miscellanea
 429
 430 (defun get-other-frame ()
 431   "Return some frame other than the current frame.
 432 Create one if necessary.  Note that the minibuffer frame, if separate,
 433 is not considered (see `next-frame')."
 434   (let ((s (if (equal (next-frame (selected-frame)) (selected-frame))
 435                (make-frame)
 436              (next-frame (selected-frame)))))
 437     s))
 438
 439 (defun next-multiframe-window ()
 440   "Select the next window, regardless of which frame it is on."
 441   (interactive)
 442   (select-window (next-window (selected-window)
 443                               (> (minibuffer-depth) 0)
 444                               t)))
 445
 446 (defun previous-multiframe-window ()
 447   "Select the previous window, regardless of which frame it is on."
 448   (interactive)
 449   (select-window (previous-window (selected-window)
 450                                   (> (minibuffer-depth) 0)
 451                                   t)))
 452
 453 (defun make-frame-on-display (display &optional parameters)
 454   "Make a frame on display DISPLAY.
 455 The optional second argument PARAMETERS specifies additional frame parameters."
 456   (interactive "sMake frame on display: ")
 457   (or (string-match "\\`[^:]*:[0-9]+\\(\\.[0-9]+\\)?\\'" display)
 458       (error "Invalid display, not HOST:SERVER or HOST:SERVER.SCREEN"))
 459   (make-frame (cons (cons 'display display) parameters)))
 460
 461 (defun make-frame-command ()
 462   "Make a new frame, and select it if the terminal displays only one frame."
 463   (interactive)
 464   (if (and window-system (not (eq window-system 'pc)))
 465       (make-frame)
 466     (select-frame (make-frame))))
 467
 468 (defvar before-make-frame-hook nil
 469   "Functions to run before a frame is created.")
 470
 471 (defvar after-make-frame-functions nil
 472   "Functions to run after a frame is created.
 473 The functions are run with one arg, the newly created frame.")
 474
 475 (defvar after-setting-font-hooks nil
 476   "Functions to run after a frame's font has been changed.")
 477
 478 ;; Alias, kept temporarily.
 479 (defalias 'new-frame 'make-frame)
 480
 481 (defun make-frame (&optional parameters)
 482   "Return a newly created frame displaying the current buffer.
 483 Optional argument PARAMETERS is an alist of parameters for the new frame.
 484 Each element of PARAMETERS should have the form (NAME . VALUE), for example:
 485
 486  (name . STRING)        The frame should be named STRING.
 487
 488  (width . NUMBER)       The frame should be NUMBER characters in width.
 489  (height . NUMBER)      The frame should be NUMBER text lines high.
 490
 491 You cannot specify either `width' or `height', you must use neither or both.
 492
 493  (minibuffer . t)       The frame should have a minibuffer.
 494  (minibuffer . nil)     The frame should have no minibuffer.
 495  (minibuffer . only)    The frame should contain only a minibuffer.
 496  (minibuffer . WINDOW)  The frame should use WINDOW as its minibuffer window.
 497
 498 Before the frame is created (via `frame-creation-function'), functions on the
 499 hook `before-make-frame-hook' are run.  After the frame is created, functions
 500 on `after-make-frame-functions' are run with one arg, the newly created frame."
 501   (interactive)
 502   (run-hooks 'before-make-frame-hook)
 503   (let ((frame (funcall frame-creation-function parameters)))
 504     (run-hook-with-args 'after-make-frame-functions frame)
 505     frame))
 506
 507 (defun filtered-frame-list (predicate)
 508   "Return a list of all live frames which satisfy PREDICATE."
 509   (let* ((frames (frame-list))
 510          (list frames))
 511     (while (consp frames)
 512       (unless (funcall predicate (car frames))
 513         (setcar frames nil))
 514       (setq frames (cdr frames)))
 515     (delq nil list)))
 516
 517 (defun minibuffer-frame-list ()
 518   "Return a list of all frames with their own minibuffers."
 519   (filtered-frame-list
 520    (function (lambda (frame)
 521                (eq frame (window-frame (minibuffer-window frame)))))))
 522
 523 (defun frames-on-display-list (&optional display)
 524   "Return a list of all frames on DISPLAY.
 525 DISPLAY is a name of a display, a string of the form HOST:SERVER.SCREEN.
 526 If DISPLAY is omitted or nil, it defaults to the selected frame's display."
 527   (let* ((display (or display (frame-parameter nil 'display)))
 528          (func #'(lambda (frame)
 529                    (eq (frame-parameter frame 'display) display))))
 530     (filtered-frame-list func)))
 531
 532 (defun framep-on-display (&optional display)
 533   "Return the type of frames on DISPLAY.
 534 DISPLAY may be a display name or a frame.  If it is a frame, its type is
 535 returned.
 536 If DISPLAY is omitted or nil, it defaults to the selected frame's display.
 537 All frames on a given display are of the same type."
 538   (or (framep display)
 539       (framep (car (frames-on-display-list display)))))
 540
 541 (defun frame-remove-geometry-params (param-list)
 542   "Return the parameter list PARAM-LIST, but with geometry specs removed.
 543 This deletes all bindings in PARAM-LIST for `top', `left', `width',
 544 `height', `user-size' and `user-position' parameters.
 545 Emacs uses this to avoid overriding explicit moves and resizings from
 546 the user during startup."
 547   (setq param-list (cons nil param-list))
 548   (let ((tail param-list))
 549     (while (consp (cdr tail))
 550       (if (and (consp (car (cdr tail)))
 551                (memq (car (car (cdr tail)))
 552                      '(height width top left user-position user-size)))
 553           (progn
 554             (setq frame-initial-geometry-arguments
 555                   (cons (car (cdr tail)) frame-initial-geometry-arguments))
 556             (setcdr tail (cdr (cdr tail))))
 557         (setq tail (cdr tail)))))
 558   (setq frame-initial-geometry-arguments
 559         (nreverse frame-initial-geometry-arguments))
 560   (cdr param-list))
 561
 562
 563 (defcustom focus-follows-mouse t
 564   "*Non-nil if window system changes focus when you move the mouse."
 565   :type 'boolean
 566   :group 'frames
 567   :version "20.3")
 568
 569 (defun other-frame (arg)
 570   "Select the ARG'th different visible frame, and raise it.
 571 All frames are arranged in a cyclic order.
 572 This command selects the frame ARG steps away in that order.
 573 A negative ARG moves in the opposite order."
 574   (interactive "p")
 575   (let ((frame (selected-frame)))
 576     (while (> arg 0)
 577       (setq frame (next-frame frame))
 578       (while (not (eq (frame-visible-p frame) t))
 579         (setq frame (next-frame frame)))
 580       (setq arg (1- arg)))
 581     (while (< arg 0)
 582       (setq frame (previous-frame frame))
 583       (while (not (eq (frame-visible-p frame) t))
 584         (setq frame (previous-frame frame)))
 585       (setq arg (1+ arg)))
 586     (select-frame frame)
 587     (raise-frame frame)
 588     ;; Ensure, if possible, that frame gets input focus.
 589     (when (eq window-system 'w32)
 590       (w32-focus-frame frame))
 591     (cond (focus-follows-mouse
 592            (unless (eq window-system 'w32)
 593              (set-mouse-position (selected-frame) (1- (frame-width)) 0)))
 594           (t
 595            (when (eq window-system 'x)
 596              (x-focus-frame frame))))))
 597
 598 (defun make-frame-names-alist ()
 599   (let* ((current-frame (selected-frame))
 600          (falist
 601           (cons
 602            (cons (frame-parameter current-frame 'name) current-frame) nil))
 603          (frame (next-frame nil t)))
 604     (while (not (eq frame current-frame))
 605       (progn
 606         (setq falist (cons (cons (frame-parameter frame 'name) frame) falist))
 607         (setq frame (next-frame frame t))))
 608     falist))
 609
 610 (defvar frame-name-history nil)
 611 (defun select-frame-by-name (name)
 612   "Select the frame whose name is NAME and raise it.
 613 If there is no frame by that name, signal an error."
 614   (interactive
 615    (let* ((frame-names-alist (make-frame-names-alist))
 616            (default (car (car frame-names-alist)))
 617            (input (completing-read
 618                    (format "Select Frame (default %s): " default)
 619                    frame-names-alist nil t nil 'frame-name-history)))
 620      (if (= (length input) 0)
 621          (list default)
 622        (list input))))
 623   (let* ((frame-names-alist (make-frame-names-alist))
 624          (frame (cdr (assoc name frame-names-alist))))
 625     (or frame
 626         (error "There is no frame named `%s'" name))
 627     (make-frame-visible frame)
 628     (raise-frame frame)
 629     (select-frame frame)
 630     ;; Ensure, if possible, that frame gets input focus.
 631     (if (eq window-system 'w32)
 632         (w32-focus-frame frame)
 633       (when focus-follows-mouse
 634         (set-mouse-position (selected-frame) (1- (frame-width)) 0)))))
 635 \f
 636 ;;;; Frame configurations
 637
 638 (defun current-frame-configuration ()
 639   "Return a list describing the positions and states of all frames.
 640 Its car is `frame-configuration'.
 641 Each element of the cdr is a list of the form (FRAME ALIST WINDOW-CONFIG),
 642 where
 643   FRAME is a frame object,
 644   ALIST is an association list specifying some of FRAME's parameters, and
 645   WINDOW-CONFIG is a window configuration object for FRAME."
 646   (cons 'frame-configuration
 647         (mapcar (function
 648                  (lambda (frame)
 649                    (list frame
 650                          (frame-parameters frame)
 651                          (current-window-configuration frame))))
 652                 (frame-list))))
 653
 654 (defun set-frame-configuration (configuration &optional nodelete)
 655   "Restore the frames to the state described by CONFIGURATION.
 656 Each frame listed in CONFIGURATION has its position, size, window
 657 configuration, and other parameters set as specified in CONFIGURATION.
 658 Ordinarily, this function deletes all existing frames not
 659 listed in CONFIGURATION.  But if optional second argument NODELETE
 660 is given and non-nil, the unwanted frames are iconified instead."
 661   (or (frame-configuration-p configuration)
 662       (signal 'wrong-type-argument
 663               (list 'frame-configuration-p configuration)))
 664   (let ((config-alist (cdr configuration))
 665         frames-to-delete)
 666     (mapcar (function
 667              (lambda (frame)
 668                (let ((parameters (assq frame config-alist)))
 669                  (if parameters
 670                      (progn
 671                        (modify-frame-parameters
 672                         frame
 673                         ;; Since we can't set a frame's minibuffer status,
 674                         ;; we might as well omit the parameter altogether.
 675                         (let* ((parms (nth 1 parameters))
 676                                (mini (assq 'minibuffer parms)))
 677                           (if mini (setq parms (delq mini parms)))
 678                           parms))
 679                        (set-window-configuration (nth 2 parameters)))
 680                    (setq frames-to-delete (cons frame frames-to-delete))))))
 681             (frame-list))
 682     (if nodelete
 683         ;; Note: making frames invisible here was tried
 684         ;; but led to some strange behavior--each time the frame
 685         ;; was made visible again, the window manager asked afresh
 686         ;; for where to put it.
 687         (mapcar 'iconify-frame frames-to-delete)
 688       (mapcar 'delete-frame frames-to-delete))))
 689 \f
 690 ;;;; Convenience functions for accessing and interactively changing
 691 ;;;; frame parameters.
 692
 693 (defun frame-height (&optional frame)
 694   "Return number of lines available for display on FRAME.
 695 If FRAME is omitted, describe the currently selected frame."
 696   (cdr (assq 'height (frame-parameters frame))))
 697
 698 (defun frame-width (&optional frame)
 699   "Return number of columns available for display on FRAME.
 700 If FRAME is omitted, describe the currently selected frame."
 701   (cdr (assq 'width (frame-parameters frame))))
 702
 703 (defalias 'set-default-font 'set-frame-font)
 704 (defun set-frame-font (font-name)
 705   "Set the font of the selected frame to FONT-NAME.
 706 When called interactively, prompt for the name of the font to use.
 707 To get the frame's current default font, use `frame-parameters'."
 708   (interactive
 709    (list
 710     (let ((completion-ignore-case t))
 711       (completing-read "Font name: "
 712                        (mapcar #'list
 713                                ;; x-list-fonts will fail with an error
 714                                ;; if this frame doesn't support fonts.
 715                                (x-list-fonts "*" nil (selected-frame)))))))
 716   (modify-frame-parameters (selected-frame)
 717                            (list (cons 'font font-name)))
 718   (run-hooks 'after-setting-font-hooks))
 719
 720 (defun set-background-color (color-name)
 721   "Set the background color of the selected frame to COLOR-NAME.
 722 When called interactively, prompt for the name of the color to use.
 723 To get the frame's current background color, use `frame-parameters'."
 724   (interactive (list (facemenu-read-color)))
 725   (modify-frame-parameters (selected-frame)
 726                            (list (cons 'background-color color-name))))
 727
 728 (defun set-foreground-color (color-name)
 729   "Set the foreground color of the selected frame to COLOR-NAME.
 730 When called interactively, prompt for the name of the color to use.
 731 To get the frame's current foreground color, use `frame-parameters'."
 732   (interactive (list (facemenu-read-color)))
 733   (modify-frame-parameters (selected-frame)
 734                            (list (cons 'foreground-color color-name))))
 735
 736 (defun set-cursor-color (color-name)
 737   "Set the text cursor color of the selected frame to COLOR-NAME.
 738 When called interactively, prompt for the name of the color to use.
 739 To get the frame's current cursor color, use `frame-parameters'."
 740   (interactive (list (facemenu-read-color)))
 741   (modify-frame-parameters (selected-frame)
 742                            (list (cons 'cursor-color color-name))))
 743
 744 (defun set-mouse-color (color-name)
 745   "Set the color of the mouse pointer of the selected frame to COLOR-NAME.
 746 When called interactively, prompt for the name of the color to use.
 747 To get the frame's current mouse color, use `frame-parameters'."
 748   (interactive (list (facemenu-read-color)))
 749   (modify-frame-parameters (selected-frame)
 750                            (list (cons 'mouse-color
 751                                        (or color-name
 752                                            (cdr (assq 'mouse-color
 753                                                       (frame-parameters))))))))
 754
 755 (defun set-border-color (color-name)
 756   "Set the color of the border of the selected frame to COLOR-NAME.
 757 When called interactively, prompt for the name of the color to use.
 758 To get the frame's current border color, use `frame-parameters'."
 759   (interactive (list (facemenu-read-color)))
 760   (modify-frame-parameters (selected-frame)
 761                            (list (cons 'border-color color-name))))
 762
 763 (defun auto-raise-mode (arg)
 764   "Toggle whether or not the selected frame should auto-raise.
 765 With arg, turn auto-raise mode on if and only if arg is positive.
 766 Note that this controls Emacs's own auto-raise feature.
 767 Some window managers allow you to enable auto-raise for certain windows.
 768 You can use that for Emacs windows if you wish, but if you do,
 769 that is beyond the control of Emacs and this command has no effect on it."
 770   (interactive "P")
 771   (if (null arg)
 772       (setq arg
 773             (if (cdr (assq 'auto-raise (frame-parameters (selected-frame))))
 774                 -1 1)))
 775   (if (> arg 0)
 776       (raise-frame (selected-frame)))
 777   (modify-frame-parameters (selected-frame)
 778                            (list (cons 'auto-raise (> arg 0)))))
 779
 780 (defun auto-lower-mode (arg)
 781   "Toggle whether or not the selected frame should auto-lower.
 782 With arg, turn auto-lower mode on if and only if arg is positive.
 783 Note that this controls Emacs's own auto-lower feature.
 784 Some window managers allow you to enable auto-lower for certain windows.
 785 You can use that for Emacs windows if you wish, but if you do,
 786 that is beyond the control of Emacs and this command has no effect on it."
 787   (interactive "P")
 788   (if (null arg)
 789       (setq arg
 790             (if (cdr (assq 'auto-lower (frame-parameters (selected-frame))))
 791                 -1 1)))
 792   (modify-frame-parameters (selected-frame)
 793                            (list (cons 'auto-lower (> arg 0)))))
 794 (defun set-frame-name (name)
 795   "Set the name of the selected frame to NAME.
 796 When called interactively, prompt for the name of the frame.
 797 The frame name is displayed on the modeline if the terminal displays only
 798 one frame, otherwise the name is displayed on the frame's caption bar."
 799   (interactive "sFrame name: ")
 800   (modify-frame-parameters (selected-frame)
 801                            (list (cons 'name name))))
 802 \f
 803 ;;;; Frame/display capabilities.
 804 (defun display-mouse-p (&optional display)
 805   "Return non-nil if DISPLAY has a mouse available.
 806 DISPLAY can be a display name, a frame, or nil (meaning the selected
 807 frame's display)."
 808   (let ((frame-type (framep-on-display display)))
 809     (cond
 810      ((eq frame-type 'pc)
 811       (msdos-mouse-p))
 812      ((eq system-type 'windows-nt)
 813       (> w32-num-mouse-buttons 0))
 814      ((memq frame-type '(x mac))
 815       t)    ;; We assume X and Mac *always* have a pointing device
 816      (t
 817       (or (and (featurep 'xt-mouse)
 818                xterm-mouse-mode)
 819           ;; t-mouse is distributed with the GPM package.  It doesn't have
 820           ;; a toggle.
 821           (featurep 't-mouse))))))
 822
 823 (defun display-popup-menus-p (&optional display)
 824   "Return non-nil if popup menus are supported on DISPLAY.
 825 DISPLAY can be a display name, a frame, or nil (meaning the selected
 826 frame's display).
 827 Support for popup menus requires that the mouse be available."
 828   (and
 829    (let ((frame-type (framep-on-display display)))
 830      (memq frame-type '(x w32 pc mac)))
 831    (display-mouse-p display)))
 832
 833 (defun display-graphic-p (&optional display)
 834   "Return non-nil if DISPLAY is a graphic display.
 835 Graphical displays are those which are capable of displaying several
 836 frames and several different fonts at once.  This is true for displays
 837 that use a window system such as X, and false for text-only terminals.
 838 DISPLAY can be a display name, a frame, or nil (meaning the selected
 839 frame's display)."
 840   (not (null (memq (framep-on-display display) '(x w32 mac)))))
 841
 842 (defalias 'display-multi-frame-p 'display-graphic-p)
 843 (defalias 'display-multi-font-p 'display-graphic-p)
 844
 845 (defun display-selections-p (&optional display)
 846   "Return non-nil if DISPLAY supports selections.
 847 A selection is a way to transfer text or other data between programs
 848 via special system buffers called `selection' or `cut buffer' or
 849 `clipboard'.
 850 DISPLAY can be a display name, a frame, or nil (meaning the selected
 851 frame's display)."
 852   (let ((frame-type (framep-on-display display)))
 853     (cond
 854      ((eq frame-type 'pc)
 855       ;; MS-DOG frames support selections when Emacs runs inside
 856       ;; the Windows' DOS Box.
 857       (not (null dos-windows-version)))
 858      ((memq frame-type '(x w32 mac))
 859       t)    ;; FIXME?
 860      (t
 861       nil))))
 862
 863 (defun display-screens (&optional display)
 864   "Return the number of screens associated with DISPLAY."
 865   (let ((frame-type (framep-on-display display)))
 866     (cond
 867      ((memq frame-type '(x w32))
 868       (x-display-screens display))
 869      (t ;; FIXME: is this correct for the Mac?
 870       1))))
 871
 872 (defun display-pixel-height (&optional display)
 873   "Return the height of DISPLAY's screen in pixels.
 874 For character terminals, each character counts as a single pixel."
 875   (let ((frame-type (framep-on-display display)))
 876     (cond
 877      ((memq frame-type '(x w32 mac))
 878       (x-display-pixel-height display))
 879      (t
 880       (frame-height (if (framep display) display (selected-frame)))))))
 881
 882 (defun display-pixel-width (&optional display)
 883   "Return the width of DISPLAY's screen in pixels.
 884 For character terminals, each character counts as a single pixel."
 885   (let ((frame-type (framep-on-display display)))
 886     (cond
 887      ((memq frame-type '(x w32 mac))
 888       (x-display-pixel-width display))
 889      (t
 890       (frame-width (if (framep display) display (selected-frame)))))))
 891
 892 (defun display-mm-height (&optional display)
 893   "Return the height of DISPLAY's screen in millimeters.
 894 If the information is unavailable, value is nil."
 895   (and (memq (framep-on-display display) '(x w32 mac))
 896        (x-display-mm-height display)))
 897
 898 (defun display-mm-width (&optional display)
 899   "Return the width of DISPLAY's screen in millimeters.
 900 If the information is unavailable, value is nil."
 901   (and (memq (framep-on-display display) '(x w32 mac))
 902        (x-display-mm-width display)))
 903
 904 (defun display-backing-store (&optional display)
 905   "Return the backing store capability of DISPLAY's screen.
 906 The value may be `always', `when-mapped', `not-useful', or nil if
 907 the question is inapplicable to a certain kind of display."
 908   (let ((frame-type (framep-on-display display)))
 909     (cond
 910      ((memq frame-type '(x w32 mac))
 911       (x-display-backing-store display))
 912      (t
 913       'not-useful))))
 914
 915 (defun display-save-under (&optional display)
 916   "Return non-nil if DISPLAY's screen supports the SaveUnder feature."
 917   (let ((frame-type (framep-on-display display)))
 918     (cond
 919      ((memq frame-type '(x w32 mac))
 920       (x-display-save-under display))
 921      (t
 922       'not-useful))))
 923
 924 (defun display-planes (&optional display)
 925   "Return the number of planes supported by DISPLAY."
 926   (let ((frame-type (framep-on-display display)))
 927     (cond
 928      ((memq frame-type '(x w32 mac))
 929       (x-display-planes display))
 930      ((eq frame-type 'pc)
 931       4)
 932      (t
 933       (truncate (log (length (tty-color-alist)) 2))))))
 934
 935 (defun display-color-cells (&optional display)
 936   "Return the number of color cells supported by DISPLAY."
 937   (let ((frame-type (framep-on-display display)))
 938     (cond
 939      ((memq frame-type '(x w32 mac))
 940       (x-display-color-cells display))
 941      ((eq frame-type 'pc)
 942       16)
 943      (t
 944       (length (tty-color-alist))))))
 945
 946 (defun display-visual-class (&optional display)
 947   "Returns the visual class of DISPLAY.
 948 The value is one of the symbols `static-gray', `gray-scale',
 949 `static-color', `pseudo-color', `true-color', or `direct-color'."
 950   (let ((frame-type (framep-on-display display)))
 951     (cond
 952      ((memq frame-type '(x w32 mac))
 953       (x-display-visual-class display))
 954      ((and (memq frame-type '(pc t))
 955            (tty-display-color-p display))
 956       'static-color)
 957      (t
 958       'static-gray))))
 959
 960 \f
 961 ;;;; Aliases for backward compatibility with Emacs 18.
 962 (defalias 'screen-height 'frame-height)
 963 (defalias 'screen-width 'frame-width)
 964
 965 (defun set-screen-width (cols &optional pretend)
 966   "Obsolete function to change the size of the screen to COLS columns.
 967 Optional second arg non-nil means that redisplay should use COLS columns
 968 but that the idea of the actual width of the frame should not be changed.
 969 This function is provided only for compatibility with Emacs 18; new code
 970 should use `set-frame-width instead'."
 971   (set-frame-width (selected-frame) cols pretend))
 972
 973 (defun set-screen-height (lines &optional pretend)
 974   "Obsolete function to change the height of the screen to LINES lines.
 975 Optional second arg non-nil means that redisplay should use LINES lines
 976 but that the idea of the actual height of the screen should not be changed.
 977 This function is provided only for compatibility with Emacs 18; new code
 978 should use `set-frame-height' instead."
 979   (set-frame-height (selected-frame) lines pretend))
 980
 981 (defun delete-other-frames (&optional frame)
 982   "Delete all frames except FRAME.
 983 FRAME nil or omitted means delete all frames except the selected frame."
 984   (interactive)
 985   (unless frame
 986     (setq frame (selected-frame)))
 987   (mapcar 'delete-frame (delq frame (frame-list))))
 988
 989
 990 (make-obsolete 'screen-height 'frame-height) ;before 19.15
 991 (make-obsolete 'screen-width  'frame-width) ;before 19.15
 992 (make-obsolete 'set-screen-width 'set-frame-width) ;before 19.15
 993 (make-obsolete 'set-screen-height 'set-frame-height) ;before 19.15
 994
 995 \f
 996 ;;; Highlighting trailing whitespace.
 997
 998 (make-variable-buffer-local 'show-trailing-whitespace)
 999
1000 (defcustom show-trailing-whitespace nil
1001   "*Non-nil means highlight trailing whitespace in face `trailing-whitespace'."
1002   :tag "Highlight trailing whitespace."
1003   :set #'(lambda (symbol value) (set-default symbol value))
1004   :type 'boolean
1005   :group 'font-lock)
1006
1007
1008 \f
1009 ;;; Scrolling
1010
1011 (defgroup scrolling nil
1012   "Scrolling windows."
1013   :version "21.1"
1014   :group 'frames)
1015
1016 (defcustom automatic-hscrolling t
1017   "*Allow or disallow autmatic scrolling windows horizontally.
1018 If non-nil, windows are automatically scrolled horizontally to make
1019 point visible."
1020   :version "21.1"
1021   :type 'boolean
1022   :group 'scrolling)
1023
1024 \f
1025 ;;; Blinking cursor
1026
1027 (defgroup cursor nil
1028   "Displaying text cursors."
1029   :version "21.1"
1030   :group 'frames)
1031
1032 (defcustom blink-cursor-delay 0.5
1033   "*Seconds of idle time after which cursor starts to blink."
1034   :tag "Delay in seconds."
1035   :type 'number
1036   :group 'cursor)
1037
1038 (defcustom blink-cursor-interval 0.5
1039   "*Length of cursor blink interval in seconds."
1040   :tag "Blink interval in seconds."
1041   :type 'number
1042   :group 'cursor)
1043
1044 (defvar blink-cursor-idle-timer nil
1045   "Timer started after `blink-cursor-delay' seconds of Emacs idle time.
1046 The function `blink-cursor-start' is called when the timer fires.")
1047
1048 (defvar blink-cursor-timer nil
1049   "Timer started from `blink-cursor-start'.
1050 This timer calls `blink-cursor' every `blink-cursor-interval' seconds.")
1051
1052 (defvar blink-cursor-mode nil
1053   "Non-nil means blinking cursor is active.")
1054
1055 (defun blink-cursor-mode (arg)
1056   "Toggle blinking cursor mode.
1057 With arg, turn blinking cursor mode on iff arg is positive.
1058 When blinking cursor mode is enabled, the cursor of the selected
1059 window blinks."
1060   (interactive "P")
1061   (let ((on-p (if (null arg)
1062                   (not blink-cursor-mode)
1063                 (> (prefix-numeric-value arg) 0))))
1064     (if blink-cursor-idle-timer
1065         (cancel-timer blink-cursor-idle-timer))
1066     (if blink-cursor-timer
1067         (cancel-timer blink-cursor-timer))
1068     (setq blink-cursor-idle-timer nil
1069           blink-cursor-timer nil
1070           blink-cursor-mode nil)
1071     (if on-p
1072         (progn
1073           ;; Hide the cursor.
1074           ;(internal-show-cursor nil nil)
1075           (setq blink-cursor-idle-timer
1076                 (run-with-idle-timer blink-cursor-delay
1077                                      blink-cursor-delay
1078                                      'blink-cursor-start))
1079           (setq blink-cursor-mode t))
1080       (internal-show-cursor nil t))))
1081
1082 ;; Note that this is really initialized from startup.el before
1083 ;; the init-file is read.
1084
1085 (defcustom blink-cursor nil
1086   "*Non-nil means blinking cursor mode is active."
1087   :group 'cursor
1088   :tag "Blinking cursor"
1089   :type 'boolean
1090   :set #'(lambda (symbol value)
1091            (set-default symbol value)
1092            (blink-cursor-mode (or value 0))))
1093
1094 (defun blink-cursor-start ()
1095   "Timer function called from the timer `blink-cursor-idle-timer'.
1096 This starts the timer `blink-cursor-timer', which makes the cursor blink
1097 if appropriate.  It also arranges to cancel that timer when the next
1098 command starts, by installing a pre-command hook."
1099   (when (null blink-cursor-timer)
1100     (add-hook 'pre-command-hook 'blink-cursor-end)
1101     (setq blink-cursor-timer
1102           (run-with-timer blink-cursor-interval blink-cursor-interval
1103                           'blink-cursor-timer-function))))
1104
1105 (defun blink-cursor-timer-function ()
1106   "Timer function of timer `blink-cursor-timer'."
1107   (internal-show-cursor nil (not (internal-show-cursor-p))))
1108
1109 (defun blink-cursor-end ()
1110   "Stop cursor blinking.
1111 This is installed as a pre-command hook by `blink-cursor-start'.
1112 When run, it cancels the timer `blink-cursor-timer' and removes
1113 itself as a pre-command hook."
1114   (remove-hook 'pre-command-hook 'blink-cursor-end)
1115   (internal-show-cursor nil t)
1116   (cancel-timer blink-cursor-timer)
1117   (setq blink-cursor-timer nil))
1118
1119
1120 \f
1121 ;;; Busy-cursor.
1122
1123 (defcustom busy-cursor t
1124   "*Non-nil means show a busy-cursor when running under a window system."
1125   :tag "Busy-cursor"
1126   :type 'boolean
1127   :group 'cursor
1128   :get #'(lambda (symbol) display-busy-cursor)
1129   :set #'(lambda (symbol value)
1130            (set-default symbol value)
1131            (setq display-busy-cursor value)))
1132
1133 (defcustom busy-cursor-delay-seconds 1
1134   "*Seconds to wait before displaying a busy-cursor."
1135   :tag "Busy-cursor delay"
1136   :type 'number
1137   :group 'cursor
1138   :get #'(lambda (symbol) busy-cursor-delay)
1139   :set #'(lambda (symbol value)
1140            (set-default symbol value)
1141            (setq busy-cursor-delay value)))
1142
1143 \f
1144 (defcustom show-cursor-in-non-selected-windows t
1145   "*Non-nil means show a hollow box cursor in non-selected-windows.
1146 If nil, don't show a cursor except in the selected window."
1147   :tag "Cursor in non-selected windows"
1148   :type 'boolean
1149   :group 'cursor
1150   :get #'(lambda (symbol) cursor-in-non-selected-windows)
1151   :set #'(lambda (symbol value)
1152            (set-default symbol value)
1153            (setq cursor-in-non-selected-windows value)
1154            (force-mode-line-update t)))
1155
1156 \f
1157 ;;;; Key bindings
1158
1159 (define-key ctl-x-5-map "2" 'make-frame-command)
1160 (define-key ctl-x-5-map "1" 'delete-other-frames)
1161 (define-key ctl-x-5-map "0" 'delete-frame)
1162 (define-key ctl-x-5-map "o" 'other-frame)
1163
1164 (provide 'frame)
1165
1166 ;;; frame.el ends here
1167 (frame-notice-user-settings):