X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/085ef9b398c7ab58fd668aed202979e450540727..b08b261e8b7aabbc3a7647e620728a6dbe973652:/lisp/frame.el

diff --git a/lisp/frame.el b/lisp/frame.el
index b49da6db5b..3fac3b2849 100644
--- a/lisp/frame.el
+++ b/lisp/frame.el
@@ -1,6 +1,7 @@
-;;; frame.el --- multi-frame management independent of window systems.
+;;; frame.el --- multi-frame management independent of window systems
 
-;; Copyright (C) 1993, 1994, 1996, 1997, 2000 Free Software Foundation, Inc.
+;; Copyright (C) 1993, 1994, 1996, 1997, 2000, 2001
+;;   Free Software Foundation, Inc.
 
 ;; Maintainer: FSF
 ;; Keywords: internal
@@ -22,6 +23,8 @@
 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 ;; Boston, MA 02111-1307, USA.
 
+;;; Commentary:
+
 ;;; Code:
 
 (defvar frame-creation-function nil
@@ -29,9 +32,9 @@
 The window system startup file should set this to its frame creation
 function, which should take an alist of parameters as its argument.")
 
-;;; 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.
+;; The initial value given here 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.
 (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,
@@ -110,17 +113,30 @@ 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)))
-      (if window
-	  ;; If we have a window already, make it visible.
-	  (let ((frame (window-frame window)))
-	    (make-frame-visible frame)
-	    (raise-frame frame)
-	    window)
-	;; If no window yet, make one in a new frame.
-	(let ((frame (make-frame (append args special-display-frame-alist))))
-	  (set-window-buffer (frame-selected-window frame) buffer)
-	  (set-window-dedicated-p (frame-selected-window frame) t)
-	  (frame-selected-window frame))))))
+      (or
+       ;; If we have a window already, make it visible.
+       (when window
+	 (let ((frame (window-frame window)))
+	   (make-frame-visible frame)
+	   (raise-frame frame)
+	   window))
+       ;; Reuse the current window if the user requested it.
+       (when (cdr (assq 'same-window args))
+	 (condition-case nil
+	     (progn (switch-to-buffer buffer) (selected-window))
+	   (error nil)))
+       ;; Stay on the same frame if requested.
+       (when (or (cdr (assq 'same-frame args)) (cdr (assq 'same-window args)))
+	 (let* ((pop-up-frames nil) (pop-up-windows t)
+		special-display-regexps special-display-buffer-names
+		(window (display-buffer buffer)))
+	   ;; (set-window-dedicated-p window t)
+	   window))
+       ;; If no window yet, make one in a new frame.
+       (let ((frame (make-frame (append args special-display-frame-alist))))
+	 (set-window-buffer (frame-selected-window frame) buffer)
+	 (set-window-dedicated-p (frame-selected-window frame) t)
+	 (frame-selected-window frame))))))
 
 (defun handle-delete-frame (event)
   "Handle delete-frame events from the X server."
@@ -140,14 +156,14 @@ Pass it BUFFER as first arg, and (cdr ARGS) gives the rest of the args."
 
 ;;;; Arrangement of frames at startup
 
-;;; 1) Load the window system startup file from the lisp library and read the
-;;; high-priority arguments (-q and the like).  The window system startup
-;;; file should create any frames specified in the window system defaults.
-;;;
-;;; 2) If no frames have been opened, we open an initial text frame.
-;;;
-;;; 3) Once the init file is done, we apply any newly set parameters
-;;; in initial-frame-alist to the frame.
+;; 1) Load the window system startup file from the lisp library and read the
+;; high-priority arguments (-q and the like).  The window system startup
+;; file should create any frames specified in the window system defaults.
+;;
+;; 2) If no frames have been opened, we open an initial text frame.
+;;
+;; 3) Once the init file is done, we apply any newly set parameters
+;; in initial-frame-alist to the frame.
 
 ;; These are now called explicitly at the proper times,
 ;; since that is easier to understand.
@@ -155,7 +171,7 @@ Pass it BUFFER as first arg, and (cdr ARGS) gives the rest of the args."
 ;; (add-hook 'before-init-hook 'frame-initialize)
 ;; (add-hook 'window-setup-hook 'frame-notice-user-settings)
 
-;;; If we create the initial frame, this is it.
+;; If we create the initial frame, this is it.
 (defvar frame-initial-frame nil)
 
 ;; Record the parameters used in frame-initialize to make the initial frame.
@@ -163,9 +179,9 @@ Pass it BUFFER as first arg, and (cdr ARGS) gives the rest of the args."
 
 (defvar frame-initial-geometry-arguments nil)
 
-;;; startup.el calls this function before loading the user's init
-;;; file - if there is no frame with a minibuffer open now, create
-;;; one to display messages while loading the init file.
+;; startup.el calls this function before loading the user's init
+;; 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 initial frame if necessary."
   ;; Are we actually running under a window system at all?
@@ -214,9 +230,9 @@ Pass it BUFFER as first arg, and (cdr ARGS) gives the rest of the args."
 (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.
+;; 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."
@@ -228,7 +244,7 @@ React to settings of `default-frame-alist', `initial-frame-alist' there."
 	(setq default-frame-alist
 	      (cons (cons 'menu-bar-lines (if menu-bar-mode 1 0))
 		    default-frame-alist)))))
-  
+
   ;; Make tool-bar-mode and default-frame-alist consistent.  Don't do
   ;; it in batch mode since that would leave a tool-bar-lines
   ;; parameter in default-frame-alist in a dumped Emacs, which is not
@@ -291,11 +307,12 @@ React to settings of `default-frame-alist', `initial-frame-alist' there."
       (when (display-graphic-p)
 	(let ((tool-bar-lines (or (assq 'tool-bar-lines initial-frame-alist)
 				  (assq 'tool-bar-lines default-frame-alist))))
-	  (when (or (null tool-bar-lines)
-		    (null (cdr tool-bar-lines))
-		    (eq 0 (cdr tool-bar-lines)))
+	  (when (and tool-bar-originally-present
+                     (or (null tool-bar-lines)
+                         (null (cdr tool-bar-lines))
+                         (eq 0 (cdr tool-bar-lines))))
 	    (let* ((char-height (frame-char-height frame-initial-frame))
-		   (image-height 24)
+		   (image-height tool-bar-images-pixel-height)
 		   (margin (cond ((and (consp tool-bar-button-margin)
 				       (integerp (cdr tool-bar-button-margin))
 				       (> tool-bar-button-margin 0))
@@ -307,19 +324,19 @@ React to settings of `default-frame-alist', `initial-frame-alist' there."
 		   (relief (if (and (integerp tool-bar-button-relief)
 				    (> tool-bar-button-relief 0))
 			       tool-bar-button-relief 3))
-		   (lines (/ (+ image-height 
+		   (lines (/ (+ image-height
 				(* 2 margin)
 				(* 2 relief)
 				(1- char-height))
 			     char-height))
 		   (height (frame-parameter frame-initial-frame 'height))
 		   (newparms (list (cons 'height (- height lines))))
-		   (initial-top (cdr (assq 'top 
+		   (initial-top (cdr (assq 'top
 					   frame-initial-geometry-arguments)))
 		   (top (frame-parameter frame-initial-frame 'top)))
 	      (when (and (consp initial-top) (eq '- (car initial-top)))
-		(setq newparms 
-		      (append newparms 
+		(setq newparms
+		      (append newparms
 			      `((top . ,(+ top (* lines char-height))))
 			      nil)))
 	      (modify-frame-parameters frame-initial-frame newparms)
@@ -351,7 +368,7 @@ React to settings of `default-frame-alist', `initial-frame-alist' there."
 	      (sleep-for 1))
 	    (setq parms (frame-parameters frame-initial-frame))
 
-       ;; Get rid of `name' unless it was specified explicitly before.
+            ;; Get rid of `name' unless it was specified explicitly before.
 	    (or (assq 'name frame-initial-frame-alist)
 		(setq parms (delq (assq 'name parms) parms)))
 
@@ -447,10 +464,10 @@ React to settings of `default-frame-alist', `initial-frame-alist' there."
 	  (setq tail allparms)
 	  ;; Find just the parms that have changed since we first
 	  ;; made this frame.  Those are the ones actually set by
-       ;; the init file.  For those parms whose values we already knew
+          ;; the init file.  For those parms whose values we already knew
 	  ;; (such as those spec'd by command line options)
 	  ;; it is undesirable to specify the parm again
-	 ;; once the user has seen the frame and been able to alter it
+          ;; once the user has seen the frame and been able to alter it
 	  ;; manually.
 	  (while tail
 	    (let (newval oldval)
@@ -502,14 +519,16 @@ is not considered (see `next-frame')."
   (interactive)
   (select-window (next-window (selected-window)
 			      (> (minibuffer-depth) 0)
-			      t)))
+			      t))
+  (select-frame-set-input-focus (selected-frame)))
 
 (defun previous-multiframe-window ()
   "Select the previous window, regardless of which frame it is on."
   (interactive)
   (select-window (previous-window (selected-window)
 				  (> (minibuffer-depth) 0)
-				  t)))
+				  t))
+  (select-frame-set-input-focus (selected-frame)))
 
 (defun make-frame-on-display (display &optional parameters)
   "Make a frame on display DISPLAY.
@@ -587,7 +606,7 @@ 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 (frame-parameter nil 'display)))
 	 (func #'(lambda (frame)
-		   (eq (frame-parameter frame 'display) display))))
+		   (equal (frame-parameter frame 'display) display))))
     (filtered-frame-list func)))
 
 (defun framep-on-display (&optional display)
@@ -622,16 +641,37 @@ the user during startup."
 
 
 (defcustom focus-follows-mouse t
-  "*Non-nil if window system changes focus when you move the mouse."
+  "*Non-nil if window system changes focus when you move the mouse.
+You should set this variable to tell Emacs how your window manager
+handles focus, since there is no way in general for Emacs to find out
+automatically."
   :type 'boolean
   :group 'frames
   :version "20.3")
 
+(defun select-frame-set-input-focus (frame)
+  "Select FRAME, raise it, and set input focus, if possible."
+    (select-frame frame)
+    (raise-frame frame)
+    ;; Ensure, if possible, that frame gets input focus.
+    (cond ((eq window-system 'x)
+	   (x-focus-frame frame))
+	  ((eq window-system 'w32)
+	   (w32-focus-frame frame)))
+    (cond (focus-follows-mouse
+	   (set-mouse-position (selected-frame) (1- (frame-width)) 0))))
+
 (defun other-frame (arg)
-  "Select the ARG'th different visible frame, and raise it.
+  "Select the ARG'th different visible frame on current display, and raise it.
 All frames are arranged in a cyclic order.
 This command selects the frame ARG steps away in that order.
-A negative ARG moves in the opposite order."
+A negative ARG moves in the opposite order.
+
+To make this command work properly, you must tell Emacs
+how the system (or the window manager) generally handles
+focus-switching between windows.  If moving the mouse onto a window
+selects it (gives it focus), set `focus-follows-mouse' to t.
+Otherwise, that variable should be nil."
   (interactive "p")
   (let ((frame (selected-frame)))
     (while (> arg 0)
@@ -644,17 +684,7 @@ A negative ARG moves in the opposite 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))))))
+    (select-frame-set-input-focus frame)))
 
 (defun make-frame-names-alist ()
   (let* ((current-frame (selected-frame))
@@ -670,7 +700,7 @@ A negative ARG moves in the opposite order."
 
 (defvar frame-name-history nil)
 (defun select-frame-by-name (name)
-  "Select the frame whose name is NAME and raise it.
+  "Select the frame on the current terminal 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))
@@ -689,10 +719,12 @@ If there is no frame by that name, signal an error."
     (raise-frame frame)
     (select-frame frame)
     ;; 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)))))
+    (cond ((eq window-system 'x)
+	   (x-focus-frame frame))
+	  ((eq window-system 'w32)
+	   (w32-focus-frame frame)))
+    (when focus-follows-mouse
+      (set-mouse-position frame (1- (frame-width frame)) 0))))
 
 ;;;; Frame configurations
 
@@ -766,7 +798,7 @@ If FRAME is omitted, describe the currently selected frame."
   "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 
+  (interactive
    (list
     (let ((completion-ignore-case t))
       (completing-read "Font name: "
@@ -778,13 +810,18 @@ To get the frame's current default font, use `frame-parameters'."
 			   (list (cons 'font font-name)))
   (run-hooks 'after-setting-font-hook 'after-setting-font-hooks))
 
+(defun set-frame-parameter (frame parameter value)
+  (modify-frame-parameters frame (list (cons parameter value))))
+
 (defun set-background-color (color-name)
   "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 (list (facemenu-read-color)))
   (modify-frame-parameters (selected-frame)
-			   (list (cons 'background-color color-name))))
+			   (list (cons 'background-color color-name)))
+  (or window-system
+      (face-set-after-frame-default (selected-frame))))
 
 (defun set-foreground-color (color-name)
   "Set the foreground color of the selected frame to COLOR-NAME.
@@ -792,7 +829,9 @@ When called interactively, prompt for the name of the color to use.
 To get the frame's current foreground color, use `frame-parameters'."
   (interactive (list (facemenu-read-color)))
   (modify-frame-parameters (selected-frame)
-			   (list (cons 'foreground-color color-name))))
+			   (list (cons 'foreground-color color-name)))
+  (or window-system
+      (face-set-after-frame-default (selected-frame))))
 
 (defun set-cursor-color (color-name)
   "Set the text cursor color of the selected frame to COLOR-NAME.
@@ -900,6 +939,15 @@ 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-images-p (&optional display)
+  "Return non-nil if DISPLAY can display images.
+
+DISPLAY can be a display name, a frame, or nil (meaning the selected
+frame's display)."
+  (and (display-graphic-p display)
+       (fboundp 'image-mask-p)
+       (fboundp 'image-size)))
+
 (defalias 'display-multi-frame-p 'display-graphic-p)
 (defalias 'display-multi-font-p 'display-graphic-p)
 
@@ -1002,7 +1050,7 @@ the question is inapplicable to a certain kind of display."
      ((eq frame-type 'pc)
       16)
      (t
-      (length (tty-color-alist))))))
+      (tty-display-color-cells)))))
 
 (defun display-visual-class (&optional display)
   "Returns the visual class of DISPLAY.
@@ -1041,11 +1089,23 @@ should use `set-frame-height' instead."
 
 (defun delete-other-frames (&optional frame)
   "Delete all frames except FRAME.
-FRAME nil or omitted means delete all frames except the selected frame."
+If FRAME uses another frame's minibuffer, the minibuffer frame is
+left untouched.  FRAME nil or omitted means use the selected frame."
   (interactive)
   (unless frame
     (setq frame (selected-frame)))
-  (mapcar 'delete-frame (delq frame (frame-list))))
+  (let* ((mini-frame (window-frame (minibuffer-window frame)))
+	 (frames (delq mini-frame (delq frame (frame-list)))))
+    ;; Delete mon-minibuffer-only frames first, because `delete-frame'
+    ;; signals an error when trying to delete a mini-frame that's
+    ;; still in use by another frame.
+    (dolist (frame frames)
+      (unless (eq (frame-parameter frame 'minibuffer) 'only)
+	(delete-frame frame)))
+    ;; Delete minibuffer-only frames.
+    (dolist (frame frames)
+      (when (eq (frame-parameter frame 'minibuffer) 'only)
+	(delete-frame frame)))))
 
 
 (make-obsolete 'screen-height 'frame-height) ;before 19.15
@@ -1053,37 +1113,43 @@ FRAME nil or omitted means delete all frames except the selected frame."
 (make-obsolete 'set-screen-width 'set-frame-width) ;before 19.15
 (make-obsolete 'set-screen-height 'set-frame-height) ;before 19.15
 
+;; miscellaneous obsolescence declarations
+(defvaralias 'delete-frame-hook 'delete-frame-functions)
+(make-obsolete-variable 'delete-frame-hook 'delete-frame-functions "21.4")
+
 
-;;; Highlighting trailing whitespace.
+;; 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'."
+  "*Non-nil means highlight trailing whitespace in face `trailing-whitespace'.
+
+Setting this variable makes it local to the current buffer."
   :tag "Highlight trailing whitespace."
-  :set #'(lambda (symbol value) (set-default symbol value))
   :type 'boolean
   :group 'font-lock)
 
 
 
-;;; Scrolling
+;; Scrolling
 
 (defgroup scrolling nil
   "Scrolling windows."
   :version "21.1"
   :group 'frames)
 
-(defcustom automatic-hscrolling t
-  "*Allow or disallow autmatic scrolling windows horizontally.
+(defcustom auto-hscroll-mode t
+  "*Allow or disallow automatic scrolling windows horizontally.
 If non-nil, windows are automatically scrolled horizontally to make
 point visible."
   :version "21.1"
   :type 'boolean
   :group 'scrolling)
+(defvaralias 'automatic-hscrolling 'auto-hscroll-mode)
 
 
-;;; Blinking cursor
+;; Blinking cursor
 
 (defgroup cursor nil
   "Displaying text cursors."
@@ -1117,7 +1183,11 @@ This timer calls `blink-cursor' every `blink-cursor-interval' seconds.")
   "Toggle blinking cursor mode.
 With a numeric argument, turn blinking cursor mode on iff ARG is positive.
 When blinking cursor mode is enabled, the cursor of the selected
-window blinks."
+window blinks.
+
+Note that this command is effective only when Emacs
+displays through a window system, because then Emacs does its own
+cursor display.  On a text-only terminal, this is not implemented."
   (interactive "P")
   (let ((on-p (if (null arg)
 		  (not blink-cursor-mode)
@@ -1170,7 +1240,7 @@ command starts, by installing a pre-command hook."
 (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 
+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)
@@ -1179,43 +1249,32 @@ itself as a pre-command hook."
 
 
 
-;;; Busy-cursor.
+;; Hourglass pointer
 
-(defcustom busy-cursor t
-  "*Non-nil means show a busy-cursor when running under a window system."
-  :tag "Busy-cursor"
+(defcustom display-hourglass t
+  "*Non-nil means show an hourglass pointer when running under a window system."
+  :tag "Hourglass pointer"
   :type 'boolean
-  :group 'cursor
-  :get #'(lambda (symbol) display-busy-cursor)
-  :set #'(lambda (symbol value)
-	   (set-default symbol value)
-	   (setq display-busy-cursor value)))
+  :group 'cursor)
 
-(defcustom busy-cursor-delay-seconds 1
-  "*Seconds to wait before displaying a busy-cursor."
-  :tag "Busy-cursor delay"
+(defcustom hourglass-delay 1
+  "*Seconds to wait before displaying an hourglass pointer."
+  :tag "Hourglass delay"
   :type 'number
-  :group 'cursor
-  :get #'(lambda (symbol) busy-cursor-delay)
-  :set #'(lambda (symbol value)
-	   (set-default symbol value)
-	   (setq busy-cursor-delay value)))
+  :group 'cursor)
 
 
-(defcustom show-cursor-in-non-selected-windows t
+(defcustom 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.
-Setting this variable directly has no effect; use custom instead
-(or set the variable `cursor-in-non-selected-windows')."
+Use Custom to set this variable to get the display updated."
   :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)))
-  
+
 
 ;;;; Key bindings