Fix pointer warp between screens.

In certain situations (pointer entering root on new screen)
the focus would not be properly set on the new screen.

SVN revision: 47768

src/focus.c

@@ -521,13 +521,56 @@ FocusNewDesk(void)
    XUngrabKeyboard(disp, CurrentTime);
 }
 
-void
-FocusCheckScreen(void)
+static void
+_FocusScreenSendEvent(Window xwin, int x, int y, Time t, int enter)
 {
-   if (EQueryPointer(NULL, NULL, NULL, NULL, NULL))
-      return;			/* On screen */
+   XEvent              xe;
 
-   FocusToEWin(NULL, FOCUS_DESK_LEAVE);
+   xe.type = (enter) ? EnterNotify : LeaveNotify;
+   xe.xcrossing.window = xwin;
+   xe.xcrossing.root = xwin;
+   xe.xcrossing.subwindow = 0;
+   xe.xcrossing.time = t;
+   xe.xcrossing.x = xe.xcrossing.x_root = x;
+   xe.xcrossing.y = xe.xcrossing.y_root = y;
+   xe.xcrossing.mode = NotifyNormal;
+   xe.xcrossing.detail = NotifyNonlinear;
+   xe.xcrossing.same_screen = (enter) ? True : False;
+   xe.xcrossing.focus = (enter) ? False : True;
+   xe.xcrossing.state = 0;
+
+   XSendEvent(disp, xwin, False, EnterWindowMask | LeaveWindowMask, &xe);
+}
+
+void
+FocusScreen(int scr)
+{
+   Window              xwin;
+   Time                t;
+   int                 x, y;
+
+   if (scr < 0 || scr >= ScreenCount(disp))
+      return;
+
+   /* IIRC warping to a different screen once did cause
+    * LeaveNotify's on the current root window. This does not
+    * happen in xorg 1.5.3 (and probably other versions).
+    * So, send LeaveNotify to current root and EnterNotify
+    * to new root. */
+
+   t = EGetTimestamp();
+
+   /* Report LeaveNotify on current root window */
+   xwin = WinGetXwin(VROOT);
+   EXQueryPointer(xwin, &x, &y, NULL, NULL);
+   _FocusScreenSendEvent(xwin, x, y, t, 0);
+
+   /* Do warp and report EnterNotify on new root window */
+   xwin = RootWindow(disp, scr);
+   x = DisplayWidth(disp, scr) / 2;
+   y = DisplayHeight(disp, scr) / 2;
+   EXWarpPointer(xwin, x, y);
+   _FocusScreenSendEvent(xwin, x, y, t, 1);
 }
 
 static void

src/focus.h

@@ -1,6 +1,6 @@
 /*
  * Copyright (C) 2000-2007 Carsten Haitzler, Geoff Harrison and various contributors
- * Copyright (C) 2004-2009 Kim Woelders
+ * Copyright (C) 2004-2010 Kim Woelders
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to
@@ -49,7 +49,7 @@ void                FocusHandleChange(EWin * ewin, XEvent * ev);
 void                FocusHandleClick(EWin * ewin, Win win);
 void                FocusNewDeskBegin(void);
 void                FocusNewDesk(void);
-void                FocusCheckScreen(void);
+void                FocusScreen(int scr);
 
 void                ClickGrabsUpdate(void);
 

src/ipc.c

@@ -1266,16 +1266,7 @@ IPC_Warp(const char *params)
      {
 	x = (Dpy.screen + 1) % ScreenCount(disp);
 	sscanf(params, "%*s %i", &x);
-	if (x >= 0 && x < ScreenCount(disp))
-	  {
-	     EXWarpPointer(RootWindow(disp, x), DisplayWidth(disp, x) / 2,
-			   DisplayHeight(disp, x) / 2);
-	     /* IIRC warping to a different screen once did cause
-	      * LeaveNotify's on the current root window. This does not
-	      * happen in xorg 1.5.3 (and probably other versions).
-	      * So, check and focus out if left. */
-	     FocusCheckScreen();
-	  }
+	FocusScreen(x);
      }
    else
      {

src/x.c

@@ -1135,7 +1135,7 @@ EXWarpPointer(Window xwin, int x, int y)
    XWarpPointer(disp, None, xwin, 0, 0, 0, 0, x, y);
 }
 
-static              Bool
+Bool
 EXQueryPointer(Window xwin, int *px, int *py, Window * pchild,
 	       unsigned int *pmask)
 {

src/xwin.h

@@ -221,6 +221,8 @@ Pixmap              EWindowGetShapePixmapInverted(Win win);
 
 Bool                EQueryPointer(Win win, int *px, int *py,
 				  Window * pchild, unsigned int *pmask);
+Bool                EXQueryPointer(Window xwin, int *px, int *py,
+				   Window * pchild, unsigned int *pmask);
 
 unsigned int        EAllocColor(Colormap cmap, unsigned int argb);