;;; 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 ()
(make-frame)
(select-frame (make-frame))))
+(defvar before-make-frame-hook nil
+ "Functions to run before a frame is created.")
+
+(defvar after-make-frame-functions nil
+ "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)
-(defun make-frame (&optional parameters)
- "Create a new frame, displaying the current buffer.
-Optional argument PARAMETERS is an alist of parameters for the new
-frame. Specifically, PARAMETERS is a list of pairs, each having
-the form (NAME . VALUE).
+(defun make-frame (&optional parameters)
+ "Return a newly created frame displaying the current buffer.
+Optional argument PARAMETERS is an alist of parameters for the new frame.
+Each element of PARAMETERS should have the form (NAME . VALUE), for example:
-Here are some of the parameters allowed (not a complete list):
+ (name . STRING) The frame should be named STRING.
-\(name . STRING) - The frame should be named STRING.
+ (width . NUMBER) The frame should be NUMBER characters in width.
+ (height . NUMBER) The frame should be NUMBER text lines high.
-\(height . NUMBER) - The frame should be NUMBER text lines high. If
- this parameter is present, the width parameter must also be
- given.
+You cannot specify either `width' or `height', you must use neither or both.
-\(width . NUMBER) - The frame should be NUMBER characters in width.
- If this parameter is present, the height parameter must also
- be given.
+ (minibuffer . t) The frame should have a minibuffer.
+ (minibuffer . nil) The frame should have no minibuffer.
+ (minibuffer . only) The frame should contain only a minibuffer.
+ (minibuffer . WINDOW) The frame should use WINDOW as its minibuffer window.
-\(minibuffer . t) - the frame should have a minibuffer
-\(minibuffer . nil) - the frame should have no minibuffer
-\(minibuffer . only) - the frame should contain only a minibuffer
-\(minibuffer . WINDOW) - the frame should use WINDOW as its minibuffer window."
+Before the frame is created (via `frame-creation-function'), functions on the
+hook `before-make-frame-hook' are run. After the frame is created, functions
+on `after-make-frame-functions' are run with one arg, the newly created frame."
(interactive)
- (let ((nframe))
- (run-hooks 'before-make-frame-hook)
- (setq nframe (funcall frame-creation-function parameters))
- (run-hooks 'after-make-frame-hook)
- nframe))
+ (run-hooks 'before-make-frame-hook)
+ (let ((frame (funcall frame-creation-function parameters)))
+ (run-hook-with-args 'after-make-frame-functions frame)
+ frame))
(defun filtered-frame-list (predicate)
"Return a list of all live frames which satisfy PREDICATE."
(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."
If FRAME is omitted, describe the currently selected frame."
(cdr (assq 'width (frame-parameters frame))))
-(defun set-default-font (font-name)
- "Set the font of the selected frame to FONT.
+(defalias 'set-default-font 'set-frame-font)
+(defun set-frame-font (font-name)
+ "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\
-should use `set-frame-width' instead."
+ "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):
HCoop / bpt / emacs.git / blobdiff