Preliminary paint property walk implementation for SPv2

third_party/WebKit/Source/core/frame/FrameView.h

 /*
    Copyright (C) 1997 Martin Jones (mjones@kde.org)
              (C) 1998 Waldo Bastian (bastian@kde.org)
              (C) 1998, 1999 Torben Weis (weis@kde.org)
              (C) 1999 Lars Knoll (knoll@kde.org)
              (C) 1999 Antti Koivisto (koivisto@kde.org)
    Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
 
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
@@ skipping 19 matching lines @@
 #include "core/frame/FrameViewAutoSizeInfo.h"
 #include "core/frame/LayoutSubtreeRootList.h"
 #include "core/frame/RootFrameViewport.h"
 #include "core/layout/LayoutAnalyzer.h"
 #include "core/paint/PaintPhase.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/Widget.h"
 #include "platform/geometry/IntRect.h"
 #include "platform/geometry/LayoutRect.h"
 #include "platform/graphics/Color.h"
+#include "platform/graphics/paint/TransformPaintPropertyNode.h"
 #include "platform/scroll/ScrollTypes.h"
 #include "platform/scroll/ScrollableArea.h"
 #include "platform/scroll/Scrollbar.h"
 #include "public/platform/WebDisplayMode.h"
 #include "public/platform/WebRect.h"
 #include "wtf/Allocator.h"
 #include "wtf/Forward.h"
 #include "wtf/HashSet.h"
 #include "wtf/ListHashSet.h"
 #include "wtf/OwnPtr.h"
@@ skipping 513 matching lines @@
     bool frameTimingRequestsDirty() { return m_frameTimingRequestsDirty; }
 
     // Returns true if this frame should not render or schedule visual updates.
     bool shouldThrottleRendering() const;
 
     // Returns true if this frame could potentially skip rendering and avoid
     // scheduling visual updates.
     bool canThrottleRendering() const;
     bool isHiddenForThrottling() const { return m_hiddenForThrottling; }
 
+    // Paint properties for SPv2 Only.
+    void setPreTranslation(PassRefPtr<TransformPaintPropertyNode> preTranslation) { m_preTranslation = preTranslation; }
+    const TransformPaintPropertyNode* preTranslation() const { return m_preTranslation.get(); }
+
+    void setScrollTranslation(PassRefPtr<TransformPaintPropertyNode> scrollTranslation) { m_scrollTranslation = scrollTranslation; }
+    const TransformPaintPropertyNode* scrollTranslation() const { return m_scrollTranslation.get(); }
+
 protected:
     // Scroll the content via the compositor.
     bool scrollContentsFastPath(const IntSize& scrollDelta);
 
     // Scroll the content by invalidating everything.
     void scrollContentsSlowPath(const IntRect& updateRect);
 
     // These functions are used to create/destroy scrollbars.
     void setHasHorizontalScrollbar(bool);
     void setHasVerticalScrollbar(bool);
@@ skipping 277 matching lines @@
     // This frame's bounds in the root frame's content coordinates, clipped
     // recursively through every ancestor view.
     IntRect m_viewportIntersection;
     bool m_viewportIntersectionValid;
 
     // The following members control rendering pipeline throttling for this
     // frame. They are only updated in response to intersection observer
     // notifications, i.e., not in the middle of the lifecycle.
     bool m_hiddenForThrottling;
     bool m_crossOriginForThrottling;
+
+    // Paint properties for SPv2 Only.
+    // The hierarchy of transform subtree created by a FrameView.
+    // [ preTranslation ]               The offset from Widget::frameRect. Establishes viewport.
+    //     +---[ scrollTranslation ]    Frame scrolling. This is going away in favor of Settings::rootLayerScrolls.
+    RefPtr<TransformPaintPropertyNode> m_preTranslation;
+    RefPtr<TransformPaintPropertyNode> m_scrollTranslation;
 };
 
 inline void FrameView::incrementVisuallyNonEmptyCharacterCount(unsigned count)
 {
     if (m_isVisuallyNonEmpty)
         return;
     m_visuallyNonEmptyCharacterCount += count;
     // Use a threshold value to prevent very small amounts of visible content from triggering didMeaningfulLayout.
     // The first few hundred characters rarely contain the interesting content of the page.
     static const unsigned visualCharacterThreshold = 200;
@@ skipping 10 matching lines @@
     static const unsigned visualPixelThreshold = 32 * 32;
     if (m_visuallyNonEmptyPixelCount > visualPixelThreshold)
         setIsVisuallyNonEmpty();
 }
 
 DEFINE_TYPE_CASTS(FrameView, Widget, widget, widget->isFrameView(), widget.isFrameView());
 
 } // namespace blink
 
 #endif // FrameView_h