Clamp window width to twice the X screen width (ditto for height). b=409006 r+sr=roc

widget/src/gtk2/nsCommonWidget.cpp

@@ -204,8 +204,7 @@ nsCommonWidget::Show(PRBool aState)
 NS_IMETHODIMP
 nsCommonWidget::Resize(PRInt32 aWidth, PRInt32 aHeight, PRBool aRepaint)
 {
-    mBounds.width = aWidth;
-    mBounds.height = aHeight;
+    mBounds.SizeTo(GetSafeWindowSize(nsSize(aWidth, aHeight)));
 
     if (!mCreated)
         return NS_OK;
@@ -278,8 +277,7 @@ nsCommonWidget::Resize(PRInt32 aX, PRInt32 aY, PRInt32 aWidth, PRInt32 aHeight,
 {
     mBounds.x = aX;
     mBounds.y = aY;
-    mBounds.width = aWidth;
-    mBounds.height = aHeight;
+    mBounds.SizeTo(GetSafeWindowSize(nsSize(aWidth, aHeight)));
 
     mPlaced = PR_TRUE;
 

widget/src/gtk2/nsCommonWidget.h

@@ -102,6 +102,8 @@ public:
 
     virtual void NativeShow  (PRBool  aAction) = 0;
 
+    virtual nsSize GetSafeWindowSize(nsSize aSize) = 0;
+
     // Some of the nsIWidget methods
     NS_IMETHOD         Show             (PRBool aState);
     NS_IMETHOD         Resize           (PRInt32 aWidth,

widget/src/gtk2/nsWindow.cpp

@@ -3572,6 +3572,32 @@ nsWindow::NativeShow (PRBool  aAction)
     }
 }
 
+nsSize
+nsWindow::GetSafeWindowSize(nsSize aSize)
+{
+    GdkScreen* screen = NULL;
+    if (mContainer) {
+        screen = gdk_drawable_get_screen(GTK_WIDGET(mContainer)->window);
+    }
+    else if (mDrawingarea) {
+        screen = gdk_drawable_get_screen(mDrawingarea->inner_window);
+    }
+
+    if (!screen)
+        return aSize;
+
+    nsSize result = aSize;
+    if (aSize.width > 2 * gdk_screen_get_width(screen)) {
+        NS_WARNING("Clamping huge window width");
+        result.width = 2 * gdk_screen_get_width(screen);
+    }
+    if (aSize.height > 2 * gdk_screen_get_height(screen)) {
+        NS_WARNING("Clamping huge window height");
+        result.height = 2 * gdk_screen_get_height(screen);
+    }
+    return result;
+}
+
 void
 nsWindow::EnsureGrabs(void)
 {

widget/src/gtk2/nsWindow.h

@@ -246,6 +246,7 @@ public:
                                     PRBool  aRepaint);
 
     void               NativeShow  (PRBool  aAction);
+    virtual nsSize     GetSafeWindowSize(nsSize aSize);
 
     void               EnsureGrabs  (void);
     void               GrabPointer  (void);