Invalidate scrollbars when window activity changes if needed

third_party/WebKit/Source/platform/scroll/Scrollbar.cpp

 /*
  * Copyright (C) 2004, 2006, 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 12 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "platform/scroll/Scrollbar.h"
 
 #include <algorithm>
 #include "platform/PlatformGestureEvent.h"
 #include "platform/PlatformMouseEvent.h"
 #include "platform/graphics/paint/CullRect.h"
+// See windowActiveChangedForSnowLeopardOnly() below.
+// TODO(ellyjones): remove this when Snow Leopard support is gone.
+#if OS(MACOSX)
+#include "platform/mac/VersionUtilMac.h"
+#endif
 #include "platform/scroll/ScrollAnimatorBase.h"
 #include "platform/scroll/ScrollableArea.h"
 #include "platform/scroll/ScrollbarTheme.h"
 
 namespace blink {
 
 PassRefPtrWillBeRawPtr<Scrollbar> Scrollbar::create(ScrollableArea* scrollableArea, ScrollbarOrientation orientation, ScrollbarControlSize size)
 {
     return adoptRefWillBeNoop(new Scrollbar(scrollableArea, orientation, size));
 }
@@ skipping 443 matching lines @@
 }
 
 bool Scrollbar::shouldParticipateInHitTesting()
 {
     // Non-overlay scrollbars should always participate in hit testing.
     if (!isOverlayScrollbar())
         return true;
     return m_scrollableArea->scrollAnimator()->shouldScrollbarParticipateInHitTesting(this);
 }
 
+// Don't use this method. It will be removed later.
+// TODO(ellyjones): remove this method after Snow Leopard support drops.
+void Scrollbar::windowActiveChangedForSnowLeopardOnly()
+{
+#if OS(MACOSX)
+    // On Snow Leopard, scrollbars need to be invalidated when the window
+    // activity changes so that they take on the "inactive" scrollbar
+    // appearance. Later OS X releases do not have such an appearance.
+    if (m_theme && m_theme->invalidateOnWindowActiveChange()) {
+        ASSERT(IsOSSnowLeopard());
+        invalidate();
+    }
+#endif
+}
+
 bool Scrollbar::isWindowActive() const
 {
     return m_scrollableArea && m_scrollableArea->isActive();
 }
 
 IntRect Scrollbar::convertToContainingView(const IntRect& localRect) const
 {
     if (m_scrollableArea)
         return m_scrollableArea->convertFromScrollbarToContainingView(this, localRect);
 
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 {
     if (m_theme->shouldRepaintAllPartsOnInvalidation()) {
         m_trackNeedsRepaint = true;
         m_thumbNeedsRepaint = true;
     }
     if (m_scrollableArea)
         m_scrollableArea->setScrollbarNeedsPaintInvalidation(this);
 }
 
 } // namespace blink