;;; frame.el --- multi-frame management independent of window systems.
-;; Copyright (C) 1993, 1994 Free Software Foundation, Inc.
+;; Copyright (C) 1993, 1994, 1996, 1997, 2000 Free Software Foundation, Inc.
;; Maintainer: FSF
;; Keywords: internal
;;; The initial value given here for used to ask for a minibuffer.
;;; But that's not necessary, because the default is to have one.
;;; By not specifying it here, we let an X resource specify it.
-(defvar initial-frame-alist nil
- "Alist of frame parameters for creating the initial X window frame.
+(defcustom initial-frame-alist nil
+ "*Alist of frame parameters for creating the initial X window frame.
You can set this in your `.emacs' file; for example,
(setq initial-frame-alist '((top . 1) (left . 1) (width . 80) (height . 55)))
Parameters specified here supersede the values given in `default-frame-alist'.
* Set `default-frame-alist' to override these options so that they
don't affect subsequent frames.
* Set `initial-frame-alist' in a way that matches the X resources,
- to override what you put in `default-frame-alist'.")
-
-(defvar minibuffer-frame-alist '((width . 80) (height . 2))
- "Alist of frame parameters for initially creating a minibuffer frame.
+ to override what you put in `default-frame-alist'."
+ :type '(repeat (cons :format "%v"
+ (symbol :tag "Parameter")
+ (sexp :tag "Value")))
+ :group 'frames)
+
+(defcustom minibuffer-frame-alist '((width . 80) (height . 2))
+ "*Alist of frame parameters for initially creating a minibuffer frame.
You can set this in your `.emacs' file; for example,
(setq minibuffer-frame-alist
'((top . 1) (left . 1) (width . 80) (height . 2)))
Parameters specified here supersede the values given in
-`default-frame-alist'.")
-
-(defvar pop-up-frame-alist nil
- "Alist of frame parameters used when creating pop-up frames.
+`default-frame-alist', for a minibuffer frame."
+ :type '(repeat (cons :format "%v"
+ (symbol :tag "Parameter")
+ (sexp :tag "Value")))
+ :group 'frames)
+
+(defcustom pop-up-frame-alist nil
+ "*Alist of frame parameters used when creating pop-up frames.
Pop-up frames are used for completions, help, and the like.
This variable can be set in your init file, like this:
(setq pop-up-frame-alist '((width . 80) (height . 20)))
-These supersede the values given in `default-frame-alist'.")
+These supersede the values given in `default-frame-alist',
+for pop-up frames."
+ :type '(repeat (cons :format "%v"
+ (symbol :tag "Parameter")
+ (sexp :tag "Value")))
+ :group 'frames)
(setq pop-up-frame-function
(function (lambda ()
(make-frame pop-up-frame-alist))))
-(defvar special-display-frame-alist
+(defcustom special-display-frame-alist
'((height . 14) (width . 80) (unsplittable . t))
"*Alist of frame parameters used when creating special frames.
Special frames are used for buffers whose names are in
one of the regular expressions in `special-display-regexps'.
This variable can be set in your init file, like this:
(setq special-display-frame-alist '((width . 80) (height . 20)))
-These supersede the values given in `default-frame-alist'.")
-
-;; Display BUFFER in its own frame, reusing an existing window if any.
-;; Return the window chosen.
-;; Currently we do not insist on selecting the window within its frame.
-;; If ARGS is an alist, use it as a list of frame parameter specs.
-;; If ARGS is a list whose car is a symbol,
-;; use (car ARGS) as a function to do the work.
-;; Pass it BUFFER as first arg, and (cdr ARGS) gives the rest of the args.
+These supersede the values given in `default-frame-alist'."
+ :type '(repeat (cons :format "%v"
+ (symbol :tag "Parameter")
+ (sexp :tag "Value")))
+ :group 'frames)
+
(defun special-display-popup-frame (buffer &optional args)
+ "Display BUFFER in its own frame, reusing an existing window if any.
+Return the window chosen.
+Currently we do not insist on selecting the window within its frame.
+If ARGS is an alist, use it as a list of frame parameter specs.
+If ARGS is a list whose car is a symbol,
+use (car ARGS) as a function to do the work.
+Pass it BUFFER as first arg, and (cdr ARGS) gives the rest of the args."
(if (and args (symbolp (car args)))
(apply (car args) buffer (cdr args))
(let ((window (get-buffer-window buffer t)))
(set-window-dedicated-p (frame-selected-window frame) t)
(frame-selected-window frame))))))
-;; Handle delete-frame events from the X server.
(defun handle-delete-frame (event)
+ "Handle delete-frame events from the X server."
(interactive "e")
(let ((frame (posn-window (event-start event)))
(i 0)
;;; file - if there is no frame with a minibuffer open now, create
;;; one to display messages while loading the init file.
(defun frame-initialize ()
-
+ "Create an in initial frame if necessary."
;; Are we actually running under a window system at all?
(if (and window-system (not noninteractive) (not (eq window-system 'pc)))
(progn
(or (delq terminal-frame (minibuffer-frame-list))
(progn
(setq frame-initial-frame-alist
- (append initial-frame-alist default-frame-alist))
- ;; Record these with their default values
- ;; if they don't have any values explicitly.
- (or (assq 'vertical-scroll-bars frame-initial-frame-alist)
- (setq frame-initial-frame-alist
- (cons '(vertical-scroll-bars . t)
- frame-initial-frame-alist)))
+ (append initial-frame-alist default-frame-alist nil))
(or (assq 'horizontal-scroll-bars frame-initial-frame-alist)
(setq frame-initial-frame-alist
(cons '(horizontal-scroll-bars . t)
frame-initial-frame-alist)))
(setq default-minibuffer-frame
(setq frame-initial-frame
- (make-frame initial-frame-alist)))
+ (make-frame frame-initial-frame-alist)))
;; Delete any specifications for window geometry parameters
;; so that we won't reapply them in frame-notice-user-settings.
;; It would be wrong to reapply them then,
;; we support that feature, otherwise arrange to cause errors.
(or (eq window-system 'pc)
(setq frame-creation-function
- (if (fboundp 'make-terminal-frame)
- 'make-terminal-frame
+ (if (fboundp 'tty-create-frame-with-faces)
+ 'tty-create-frame-with-faces
(function
(lambda (parameters)
(error
"Can't create multiple frames without a window system"))))))))
+(defvar frame-notice-user-settings t
+ "Non-nil means function `frame-notice-user-settings' wasn't run yet.")
+
;;; startup.el calls this function after loading the user's init
;;; file. Now default-frame-alist and initial-frame-alist contain
;;; information to which we must react; do what needs to be done.
(defun frame-notice-user-settings ()
-
+ "Act on user's init file settings of frame parameters.
+React to settings of `default-frame-alist', `initial-frame-alist' there."
;; Make menu-bar-mode and default-frame-alist consistent.
(if (boundp 'menu-bar-mode)
(let ((default (assq 'menu-bar-lines default-frame-alist)))
;; window is the minibuffer.
(let ((old-buffer (current-buffer)))
+ (when (and frame-notice-user-settings
+ (null frame-initial-frame))
+ ;; This case happens when we don't have a window system.
+ (let ((parms (frame-parameters frame-initial-frame)))
+ ;; Don't change the frame names.
+ (setq parms (delq (assq 'name parms) parms))
+ ;; Can't modify the minibuffer parameter, so don't try.
+ (setq parms (delq (assq 'minibuffer parms) parms))
+ (modify-frame-parameters nil
+ (append initial-frame-alist
+ default-frame-alist
+ parms
+ nil))))
+
;; If the initial frame is still around, apply initial-frame-alist
;; and default-frame-alist to it.
(if (frame-live-p frame-initial-frame)
;; when we first made the frame.
(setq parms (cons '(reverse) (delq (assq 'reverse parms) parms)))
(if (assq 'height frame-initial-geometry-arguments)
- (setq parms (frame-delete-all 'height parms)))
+ (setq parms (assq-delete-all 'height parms)))
(if (assq 'width frame-initial-geometry-arguments)
- (setq parms (frame-delete-all 'width parms)))
+ (setq parms (assq-delete-all 'width parms)))
(if (assq 'left frame-initial-geometry-arguments)
- (setq parms (frame-delete-all 'left parms)))
+ (setq parms (assq-delete-all 'left parms)))
(if (assq 'top frame-initial-geometry-arguments)
- (setq parms (frame-delete-all 'top parms)))
+ (setq parms (assq-delete-all 'top parms)))
(setq new
(make-frame
;; Use the geometry args that created the existing
(setq allparms (append initial-frame-alist
default-frame-alist))
(if (assq 'height frame-initial-geometry-arguments)
- (setq allparms (frame-delete-all 'height allparms)))
+ (setq allparms (assq-delete-all 'height allparms)))
(if (assq 'width frame-initial-geometry-arguments)
- (setq allparms (frame-delete-all 'width allparms)))
+ (setq allparms (assq-delete-all 'width allparms)))
(if (assq 'left frame-initial-geometry-arguments)
- (setq allparms (frame-delete-all 'left allparms)))
+ (setq allparms (assq-delete-all 'left allparms)))
(if (assq 'top frame-initial-geometry-arguments)
- (setq allparms (frame-delete-all 'top allparms)))
+ (setq allparms (assq-delete-all 'top allparms)))
(setq tail allparms)
;; Find just the parms that have changed since we first
;; made this frame. Those are the ones actually set by
(setq newparms (nreverse newparms))
(modify-frame-parameters frame-initial-frame
newparms)
+ ;; If we changed the background color,
+ ;; we need to update the background-mode parameter
+ ;; and maybe some faces too.
+ (when (assq 'background-color newparms)
+ (unless (assq 'background-mode newparms)
+ (frame-set-background-mode frame-initial-frame))
+ (face-set-after-frame-default frame-initial-frame))
(if (assq 'font newparms)
(frame-update-faces frame-initial-frame)))))
;; Make sure the initial frame can be GC'd if it is ever deleted.
;; Make sure frame-notice-user-settings does nothing if called twice.
+ (setq frame-notice-user-settings nil)
(setq frame-initial-frame nil)))
(defun make-initial-minibuffer-frame (display)
(make-frame-on-display display parms)
(make-frame parms))))
-;; Delete from ALIST all elements whose car is KEY.
-;; Return the modified alist.
-(defun frame-delete-all (key alist)
- (setq alist (copy-sequence alist))
- (let ((tail alist))
- (while tail
- (if (eq (car (car tail)) key)
- (setq alist (delq (car tail) alist)))
- (setq tail (cdr tail)))
- alist))
-\f
;;;; Creation of additional frames, and other frame miscellanea
-;;; Return some frame other than the current frame, creating one if
-;;; necessary. Note that the minibuffer frame, if separate, is not
-;;; considered (see next-frame).
(defun get-other-frame ()
+ "Return some frame other than the current frame.
+Create one if necessary. Note that the minibuffer frame, if separate,
+is not considered (see `next-frame')."
(let ((s (if (equal (next-frame (selected-frame)) (selected-frame))
(make-frame)
(next-frame (selected-frame)))))
"Make a frame on display DISPLAY.
The optional second argument PARAMETERS specifies additional frame parameters."
(interactive "sMake frame on display: ")
+ (or (string-match "\\`[^:]*:[0-9]+\\(\\.[0-9]+\\)?\\'" display)
+ (error "Invalid display, not HOST:SERVER or HOST:SERVER.SCREEN"))
(make-frame (cons (cons 'display display) parameters)))
(defun make-frame-command ()
"Functions to run after a frame is created.
The functions are run with one arg, the newly created frame.")
+(defvar after-setting-font-hooks nil
+ "Functions to run after a frame's font has been changed.")
+
;; Alias, kept temporarily.
(defalias 'new-frame 'make-frame)
(interactive)
(run-hooks 'before-make-frame-hook)
(let ((frame (funcall frame-creation-function parameters)))
- (custom-initialize-frame frame)
(run-hook-with-args 'after-make-frame-functions frame)
frame))
(function (lambda (frame)
(eq frame (window-frame (minibuffer-window frame)))))))
+(defun frames-on-display-list (&optional display)
+ "Return a list of all frames on DISPLAY.
+DISPLAY is a name of a display, a string of the form HOST:SERVER.SCREEN.
+If DISPLAY is omitted or nil, it defaults to the selected frame's display."
+ (let* ((display (or display
+ (cdr (assoc 'display (frame-parameters)))))
+ (func
+ (function (lambda (frame)
+ (eq (cdr (assoc 'display (frame-parameters frame)))
+ display)))))
+ (filtered-frame-list func)))
+
+(defun framep-on-display (&optional display)
+ "Return the type of frames on DISPLAY.
+DISPLAY may be a display name or a frame. If it is a frame, its type is
+returned.
+If DISPLAY is omitted or nil, it defaults to the selected frame's display.
+All frames on a given display are of the same type."
+ (or (framep display)
+ (framep (car (frames-on-display-list display)))))
+
(defun frame-remove-geometry-params (param-list)
"Return the parameter list PARAM-LIST, but with geometry specs removed.
This deletes all bindings in PARAM-LIST for `top', `left', `width',
(cdr param-list))
+(defcustom focus-follows-mouse t
+ "*Non-nil if window system changes focus when you move the mouse."
+ :type 'boolean
+ :group 'frames
+ :version "20.3")
+
(defun other-frame (arg)
"Select the ARG'th different visible frame, and raise it.
All frames are arranged in a cyclic order.
(while (not (eq (frame-visible-p frame) t))
(setq frame (previous-frame frame)))
(setq arg (1+ arg)))
+ (select-frame frame)
+ (raise-frame frame)
+ ;; Ensure, if possible, that frame gets input focus.
+ (when (eq window-system 'w32)
+ (w32-focus-frame frame))
+ (cond (focus-follows-mouse
+ (unless (eq window-system 'w32)
+ (set-mouse-position (selected-frame) (1- (frame-width)) 0)))
+ (t
+ (when (eq window-system 'x)
+ (x-focus-frame frame))))))
+
+(defun make-frame-names-alist ()
+ (let* ((current-frame (selected-frame))
+ (falist
+ (cons
+ (cons (frame-parameter current-frame 'name) current-frame) nil))
+ (frame (next-frame nil t)))
+ (while (not (eq frame current-frame))
+ (progn
+ (setq falist (cons (cons (frame-parameter frame 'name) frame) falist))
+ (setq frame (next-frame frame t))))
+ falist))
+
+(defvar frame-name-history nil)
+(defun select-frame-by-name (name)
+ "Select the frame whose name is NAME and raise it.
+If there is no frame by that name, signal an error."
+ (interactive
+ (let* ((frame-names-alist (make-frame-names-alist))
+ (default (car (car frame-names-alist)))
+ (input (completing-read
+ (format "Select Frame (default %s): " default)
+ frame-names-alist nil t nil 'frame-name-history)))
+ (if (= (length input) 0)
+ (list default)
+ (list input))))
+ (let* ((frame-names-alist (make-frame-names-alist))
+ (frame (cdr (assoc name frame-names-alist))))
+ (or frame
+ (error "There is no frame named `%s'" name))
+ (make-frame-visible frame)
(raise-frame frame)
(select-frame frame)
- (set-mouse-position (selected-frame) (1- (frame-width)) 0)))
+ ;; Ensure, if possible, that frame gets input focus.
+ (if (eq window-system 'w32)
+ (w32-focus-frame frame)
+ (when focus-follows-mouse
+ (set-mouse-position (selected-frame) (1- (frame-width)) 0)))))
\f
;;;; Frame configurations
;;;; Convenience functions for accessing and interactively changing
;;;; frame parameters.
+(defun frame-parameter (frame parameter)
+ "Return FRAME's value for parameter PARAMETER.
+If FRAME is nil, describe the currently selected frame."
+ (cdr (assq parameter (frame-parameters frame))))
+
(defun frame-height (&optional frame)
"Return number of lines available for display on FRAME.
If FRAME is omitted, describe the currently selected frame."
(defalias 'set-default-font 'set-frame-font)
(defun set-frame-font (font-name)
- "Set the font of the selected frame to FONT.
+ "Set the font of the selected frame to FONT-NAME.
When called interactively, prompt for the name of the font to use.
To get the frame's current default font, use `frame-parameters'."
(interactive "sFont name: ")
(modify-frame-parameters (selected-frame)
(list (cons 'font font-name)))
;; Update faces that want a bold or italic version of the default font.
- (frame-update-faces (selected-frame)))
+ (frame-update-faces (selected-frame))
+ (run-hooks 'after-setting-font-hooks))
(defun set-background-color (color-name)
- "Set the background color of the selected frame to COLOR.
+ "Set the background color of the selected frame to COLOR-NAME.
When called interactively, prompt for the name of the color to use.
To get the frame's current background color, use `frame-parameters'."
- (interactive "sColor: ")
+ (interactive (list (facemenu-read-color)))
(modify-frame-parameters (selected-frame)
(list (cons 'background-color color-name)))
(frame-update-face-colors (selected-frame)))
(defun set-foreground-color (color-name)
- "Set the foreground color of the selected frame to COLOR.
+ "Set the foreground color of the selected frame to COLOR-NAME.
When called interactively, prompt for the name of the color to use.
To get the frame's current foreground color, use `frame-parameters'."
- (interactive "sColor: ")
+ (interactive (list (facemenu-read-color)))
(modify-frame-parameters (selected-frame)
(list (cons 'foreground-color color-name)))
(frame-update-face-colors (selected-frame)))
(defun set-cursor-color (color-name)
- "Set the text cursor color of the selected frame to COLOR.
+ "Set the text cursor color of the selected frame to COLOR-NAME.
When called interactively, prompt for the name of the color to use.
To get the frame's current cursor color, use `frame-parameters'."
- (interactive "sColor: ")
+ (interactive (list (facemenu-read-color)))
(modify-frame-parameters (selected-frame)
(list (cons 'cursor-color color-name))))
(defun set-mouse-color (color-name)
- "Set the color of the mouse pointer of the selected frame to COLOR.
+ "Set the color of the mouse pointer of the selected frame to COLOR-NAME.
When called interactively, prompt for the name of the color to use.
To get the frame's current mouse color, use `frame-parameters'."
- (interactive "sColor: ")
+ (interactive (list (facemenu-read-color)))
(modify-frame-parameters (selected-frame)
- (list (cons 'mouse-color color-name))))
+ (list (cons 'mouse-color
+ (or color-name
+ (cdr (assq 'mouse-color
+ (frame-parameters))))))))
(defun set-border-color (color-name)
- "Set the color of the border of the selected frame to COLOR.
+ "Set the color of the border of the selected frame to COLOR-NAME.
When called interactively, prompt for the name of the color to use.
To get the frame's current border color, use `frame-parameters'."
- (interactive "sColor: ")
+ (interactive (list (facemenu-read-color)))
(modify-frame-parameters (selected-frame)
(list (cons 'border-color color-name))))
(setq arg
(if (cdr (assq 'auto-raise (frame-parameters (selected-frame))))
-1 1)))
+ (if (> arg 0)
+ (raise-frame (selected-frame)))
(modify-frame-parameters (selected-frame)
(list (cons 'auto-raise (> arg 0)))))
-1 1)))
(modify-frame-parameters (selected-frame)
(list (cons 'auto-lower (> arg 0)))))
-
-(defvar scroll-bar-side 'left
- "*Specify which side scroll bars should be on. Value is `left' or `right'.")
-
-(defun toggle-scroll-bar (arg)
- "Toggle whether or not the selected frame has vertical scroll bars.
-With arg, turn vertical scroll bars on if and only if arg is positive."
- (interactive "P")
- (if (null arg)
- (setq arg
- (if (cdr (assq 'vertical-scroll-bars
- (frame-parameters (selected-frame))))
- -1 1)))
+(defun set-frame-name (name)
+ "Set the name of the selected frame to NAME.
+When called interactively, prompt for the name of the frame.
+The frame name is displayed on the modeline if the terminal displays only
+one frame, otherwise the name is displayed on the frame's caption bar."
+ (interactive "sFrame name: ")
(modify-frame-parameters (selected-frame)
- (list (cons 'vertical-scroll-bars
- (if (> arg 0)
- scroll-bar-side)))))
-
-(defun toggle-horizontal-scroll-bar (arg)
- "Toggle whether or not the selected frame has horizontal scroll bars.
-With arg, turn horizontal scroll bars on if and only if arg is positive.
-Horizontal scroll bars aren't implemented yet."
- (interactive "P")
- (error "Horizontal scroll bars aren't implemented yet"))
+ (list (cons 'name name))))
+\f
+;;;; Frame/display capabilities.
+(defun display-mouse-p (&optional display)
+ "Return non-nil if DISPLAY has a mouse available.
+DISPLAY can be a display name, a frame, or nil (meaning the selected
+frame's display)."
+ (let ((frame-type (framep-on-display display)))
+ (cond
+ ((eq frame-type 'pc)
+ (msdos-mouse-p))
+ ((eq system-type 'windows-nt)
+ (> w32-num-mouse-buttons 0))
+ ((memq frame-type '(x mac))
+ t) ;; We assume X and Mac *always* have a pointing device
+ (t
+ (or (and (featurep 'xt-mouse)
+ xterm-mouse-mode)
+ ;; t-mouse is distributed with the GPM package. It doesn't have
+ ;; a toggle.
+ (featurep 't-mouse))))))
+
+(defun display-popup-menus-p (&optional display)
+ "Return non-nil if popup menus are supported on DISPLAY.
+DISPLAY can be a display name, a frame, or nil (meaning the selected
+frame's display).
+Support for popup menus requires that the mouse be available."
+ (and
+ (let ((frame-type (framep-on-display display)))
+ (memq frame-type '(x w32 pc mac)))
+ (display-mouse-p display)))
+
+(defun display-graphic-p (&optional display)
+ "Return non-nil if DISPLAY is a graphic display.
+Graphical displays are those which are capable of displaying several
+frames and several different fonts at once. This is true for displays
+that use a window system such as X, and false for text-only terminals.
+DISPLAY can be a display name, a frame, or nil (meaning the selected
+frame's display)."
+ (not (null (memq (framep-on-display display) '(x w32 mac)))))
+
+(defun display-selections-p (&optional display)
+ "Return non-nil if DISPLAY supports selections.
+A selection is a way to transfer text or other data between programs
+via special system buffers called `selection' or `cut buffer' or
+`clipboard'.
+DISPLAY can be a display name, a frame, or nil (meaning the selected
+frame's display)."
+ (let ((frame-type (framep-on-display display)))
+ (cond
+ ((eq frame-type 'pc)
+ ;; MS-DOG frames support selections when Emacs runs inside
+ ;; the Windows' DOS Box.
+ (not (null dos-windows-version)))
+ ((memq frame-type '(x w32 mac))
+ t) ;; FIXME?
+ (t
+ nil))))
+
+(defun display-screens (&optional display)
+ "Return the number of screens associated with DISPLAY."
+ (let ((frame-type (framep-on-display display)))
+ (cond
+ ((memq frame-type '(x w32))
+ (x-display-screens display))
+ (t ;; FIXME: is this correct for the Mac?
+ 1))))
+
+(defun display-pixel-height (&optional display)
+ "Return the height of DISPLAY's screen in pixels.
+For character terminals, each character counts as a single pixel."
+ (let ((frame-type (framep-on-display display)))
+ (cond
+ ((memq frame-type '(x w32 mac))
+ (x-display-pixel-height display))
+ (t
+ (frame-height (if (framep display) display (selected-frame)))))))
+
+(defun display-pixel-width (&optional display)
+ "Return the width of DISPLAY's screen in pixels.
+For character terminals, each character counts as a single pixel."
+ (let ((frame-type (framep-on-display display)))
+ (cond
+ ((memq frame-type '(x w32 mac))
+ (x-display-pixel-width display))
+ (t
+ (frame-width (if (framep display) display (selected-frame)))))))
+
+(defun display-mm-height (&optional display)
+ "Return the height of DISPLAY's screen in millimeters.
+If the information is unavailable, value is nil."
+ (and (memq (framep-on-display display) '(x w32 mac))
+ (x-display-mm-height display)))
+
+(defun display-mm-width (&optional display)
+ "Return the width of DISPLAY's screen in millimeters.
+If the information is unavailable, value is nil."
+ (and (memq (framep-on-display display) '(x w32 mac))
+ (x-display-mm-width display)))
+
+(defun display-backing-store (&optional display)
+ "Return the backing store capability of DISPLAY's screen.
+The value may be `always', `when-mapped', `not-useful', or nil if
+the question is inapplicable to a certain kind of display."
+ (let ((frame-type (framep-on-display display)))
+ (cond
+ ((memq frame-type '(x w32 mac))
+ (x-display-backing-store display))
+ (t
+ 'not-useful))))
+
+(defun display-save-under (&optional display)
+ "Return non-nil if DISPLAY's screen supports the SaveUnder feature."
+ (let ((frame-type (framep-on-display display)))
+ (cond
+ ((memq frame-type '(x w32 mac))
+ (x-display-save-under display))
+ (t
+ 'not-useful))))
+
+(defun display-planes (&optional display)
+ "Return the number of planes supported by DISPLAY."
+ (let ((frame-type (framep-on-display display)))
+ (cond
+ ((memq frame-type '(x w32 mac))
+ (x-display-planes display))
+ ((eq frame-type 'pc)
+ 4)
+ (t
+ (truncate (log (length (tty-color-alist)) 2))))))
+
+(defun display-color-cells (&optional display)
+ "Return the number of color cells supported by DISPLAY."
+ (let ((frame-type (framep-on-display display)))
+ (cond
+ ((memq frame-type '(x w32 mac))
+ (x-display-color-cells display))
+ ((eq frame-type 'pc)
+ 16)
+ (t
+ (length (tty-color-alist))))))
+
+(defun display-visual-class (&optional display)
+ "Returns the visual class of DISPLAY.
+The value is one of the symbols `static-gray', `gray-scale',
+`static-color', `pseudo-color', `true-color', or `direct-color'."
+ (let ((frame-type (framep-on-display display)))
+ (cond
+ ((memq frame-type '(x w32 mac))
+ (x-display-visual-class display))
+ ((and (memq frame-type '(pc t))
+ (tty-display-color-p display))
+ 'static-color)
+ (t
+ 'static-gray))))
\f
;;;; Aliases for backward compatibility with Emacs 18.
(defalias 'screen-width 'frame-width)
(defun set-screen-width (cols &optional pretend)
- "Obsolete function to change the size of the screen to COLS columns.\n\
-Optional second arg non-nil means that redisplay should use COLS columns\n\
-but that the idea of the actual width of the frame should not be changed.\n\
-This function is provided only for compatibility with Emacs 18; new code\n\
+ "Obsolete function to change the size of the screen to COLS columns.
+Optional second arg non-nil means that redisplay should use COLS columns
+but that the idea of the actual width of the frame should not be changed.
+This function is provided only for compatibility with Emacs 18; new code
should use `set-frame-width instead'."
(set-frame-width (selected-frame) cols pretend))
(defun set-screen-height (lines &optional pretend)
- "Obsolete function to change the height of the screen to LINES lines.\n\
-Optional second arg non-nil means that redisplay should use LINES lines\n\
-but that the idea of the actual height of the screen should not be changed.\n\
-This function is provided only for compatibility with Emacs 18; new code\n\
+ "Obsolete function to change the height of the screen to LINES lines.
+Optional second arg non-nil means that redisplay should use LINES lines
+but that the idea of the actual height of the screen should not be changed.
+This function is provided only for compatibility with Emacs 18; new code
should use `set-frame-height' instead."
(set-frame-height (selected-frame) lines pretend))
+(defun delete-other-frames (&optional frame)
+ "Delete all frames except FRAME.
+FRAME nil or omitted means delete all frames except the selected frame."
+ (interactive)
+ (unless frame
+ (setq frame (selected-frame)))
+ (mapcar 'delete-frame (delq frame (frame-list))))
+
+
(make-obsolete 'screen-height 'frame-height)
(make-obsolete 'screen-width 'frame-width)
(make-obsolete 'set-screen-width 'set-frame-width)
(make-obsolete 'set-screen-height 'set-frame-height)
\f
+;;; Highlighting trailing whitespace.
+
+(make-variable-buffer-local 'show-trailing-whitespace)
+
+(defcustom show-trailing-whitespace nil
+ "*Non-nil means highlight trailing whitespace in face `trailing-whitespace'."
+ :tag "Highlight trailing whitespace."
+ :set #'(lambda (symbol value) (set-default symbol value))
+ :type 'boolean
+ :group 'font-lock)
+
+
+\f
+;;; Scrolling
+
+(defgroup scrolling nil
+ "Scrolling windows."
+ :version "21.1"
+ :group 'frames)
+
+(defcustom automatic-hscrolling t
+ "*Allow or disallow autmatic scrolling windows horizontally.
+If non-nil, windows are autmatically scrolled horizontally to make
+point visible."
+ :version "21.1"
+ :type 'boolean
+ :group 'scrolling)
+
+\f
+;;; Blinking cursor
+
+(defgroup cursor nil
+ "Displaying text cursors."
+ :version "21.1"
+ :group 'frames)
+
+(defcustom blink-cursor-delay 0.5
+ "*Seconds of idle time after which cursor starts to blink."
+ :tag "Delay in seconds."
+ :type 'number
+ :group 'cursor)
+
+(defcustom blink-cursor-interval 0.5
+ "*Length of cursor blink interval in seconds."
+ :tag "Blink interval in seconds."
+ :type 'number
+ :group 'cursor)
+
+(defvar blink-cursor-idle-timer nil
+ "Timer started after `blink-cursor-delay' seconds of Emacs idle time.
+The function `blink-cursor-start' is called when the timer fires.")
+
+(defvar blink-cursor-timer nil
+ "Timer started from `blink-cursor-start'.
+This timer calls `blink-cursor' every `blink-cursor-interval' seconds.")
+
+(defvar blink-cursor-mode nil
+ "Non-nil means blinking cursor is active.")
+
+(defun blink-cursor-mode (arg)
+ "Toggle blinking cursor mode.
+With arg, turn blinking cursor mode on iff arg is positive.
+When blinking cursor mode is enabled, the cursor of the selected
+window blinks."
+ (interactive "P")
+ (let ((on-p (if (null arg)
+ (not blink-cursor-mode)
+ (> (prefix-numeric-value arg) 0))))
+ (if blink-cursor-idle-timer
+ (cancel-timer blink-cursor-idle-timer))
+ (if blink-cursor-timer
+ (cancel-timer blink-cursor-timer))
+ (setq blink-cursor-idle-timer nil
+ blink-cursor-timer nil
+ blink-cursor-mode nil)
+ (if on-p
+ (progn
+ ;; Hide the cursor.
+ (internal-show-cursor nil nil)
+ (setq blink-cursor-idle-timer
+ (run-with-idle-timer blink-cursor-delay
+ blink-cursor-delay
+ 'blink-cursor-start))
+ (setq blink-cursor-mode t))
+ (internal-show-cursor nil t))))
+
+(defcustom blink-cursor (not (eq system-type 'ms-dos))
+ "*Non-nil means blinking cursor mode is active."
+ :tag "Blinking cursor"
+ :type 'boolean
+ :group 'cursor
+ :set #'(lambda (symbol value)
+ (set-default symbol value)
+ (blink-cursor-mode (or value 0))))
+
+(defun blink-cursor-start ()
+ "Timer function called from the timer `blink-cursor-idle-timer'.
+This starts the timer `blink-cursor-timer', which makes the cursor blink
+if appropriate. It also arranges to cancel that timer when the next
+command starts, by installing a pre-command hook."
+ (when (null blink-cursor-timer)
+ (add-hook 'pre-command-hook 'blink-cursor-end)
+ (setq blink-cursor-timer
+ (run-with-timer blink-cursor-interval blink-cursor-interval
+ 'blink-cursor-timer-function))))
+
+(defun blink-cursor-timer-function ()
+ "Timer function of timer `blink-cursor-timer'."
+ (internal-show-cursor nil (not (internal-show-cursor-p))))
+
+(defun blink-cursor-end ()
+ "Stop cursor blinking.
+This is installed as a pre-command hook by `blink-cursor-start'.
+When run, it cancels the timer `blink-cursor-timer' and removes
+itself as a pre-command hook."
+ (remove-hook 'pre-command-hook 'blink-cursor-end)
+ (internal-show-cursor nil t)
+ (cancel-timer blink-cursor-timer)
+ (setq blink-cursor-timer nil))
+
+
+\f
+;;; Busy-cursor.
+
+(defcustom busy-cursor t
+ "*Non-nil means show a busy-cursor when running under a window system."
+ :tag "Busy-cursor"
+ :type 'boolean
+ :group 'cursor
+ :get #'(lambda (symbol) display-busy-cursor)
+ :set #'(lambda (symbol value)
+ (set-default symbol value)
+ (setq display-busy-cursor value)))
+
+(defcustom busy-cursor-delay-seconds 1
+ "*Seconds to wait before displaying a busy-cursor."
+ :tag "Busy-cursor delay"
+ :type 'number
+ :group 'cursor
+ :get #'(lambda (symbol) busy-cursor-delay)
+ :set #'(lambda (symbol value)
+ (set-default symbol value)
+ (setq busy-cursor-delay value)))
+
+\f
+(defcustom show-cursor-in-non-selected-windows t
+ "*Non-nil means show a hollow box cursor in non-selected-windows.
+If nil, don't show a cursor except in the selected window."
+ :tag "Cursor in non-selected windows"
+ :type 'boolean
+ :group 'cursor
+ :get #'(lambda (symbol) cursor-in-non-selected-windows)
+ :set #'(lambda (symbol value)
+ (set-default symbol value)
+ (setq cursor-in-non-selected-windows value)
+ (force-mode-line-update t)))
+
+\f
;;;; Key bindings
(define-key ctl-x-5-map "2" 'make-frame-command)
+(define-key ctl-x-5-map "1" 'delete-other-frames)
(define-key ctl-x-5-map "0" 'delete-frame)
(define-key ctl-x-5-map "o" 'other-frame)
(provide 'frame)
;;; frame.el ends here
+(frame-notice-user-settings):