First step of PaintInvalidator implementation

third_party/WebKit/Source/core/layout/LayoutHTMLCanvas.cpp

 /*
  * Copyright (C) 2004, 2006, 2007 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 "core/layout/LayoutHTMLCanvas.h"
 
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/html/HTMLCanvasElement.h"
 #include "core/layout/LayoutView.h"
 #include "core/page/Page.h"
+#include "core/paint/HTMLCanvasPaintInvalidator.h"
 #include "core/paint/HTMLCanvasPainter.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
 LayoutHTMLCanvas::LayoutHTMLCanvas(HTMLCanvasElement* element)
     : LayoutReplaced(element, LayoutSize(element->size()))
 {
     view()->frameView()->setIsVisuallyNonEmpty();
@@ skipping 33 matching lines @@
         // check above is insufficient because updateLogical{Width,Height} just
         // used the override size. We actually have to mark ourselves as needing
         // layout so the flex algorithm can run and compute our size correctly.
         return;
     }
 
     if (!selfNeedsLayout())
         setNeedsLayout(LayoutInvalidationReason::SizeChanged);
 }
 
-PaintInvalidationReason LayoutHTMLCanvas::invalidatePaintIfNeeded(const PaintInvalidationState& paintInvalidationState)
+PaintInvalidationReason LayoutHTMLCanvas::invalidatePaintIfNeeded(const PaintInvalidatorContext& context) const
 {
-    PaintInvalidationReason reason = LayoutBox::invalidatePaintIfNeeded(paintInvalidationState);
-    HTMLCanvasElement* element = toHTMLCanvasElement(node());
-    if (element->isDirty()) {
-        element->doDeferredPaintInvalidation();
-        if (reason < PaintInvalidationRectangle)
-            reason = PaintInvalidationRectangle;
-    }
-    return reason;
+    return HTMLCanvasPaintInvalidator(*this, context).invalidatePaintIfNeeded();
 }
 
 CompositingReasons LayoutHTMLCanvas::additionalCompositingReasons() const
 {
     if (toHTMLCanvasElement(node())->shouldBeDirectComposited())
         return CompositingReasonCanvas;
     return CompositingReasonNone;
 }
 
 void LayoutHTMLCanvas::styleDidChange(StyleDifference diff, const ComputedStyle* oldStyle)
 {
     LayoutReplaced::styleDidChange(diff, oldStyle);
     toHTMLCanvasElement(node())->styleDidChange(oldStyle, styleRef());
 }
 
 } // namespace blink