Rework compositor touch hit testing

Source/core/rendering/svg/RenderSVGModelObject.cpp

 /*
  * Copyright (c) 2009, Google 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:
  * 
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 
 #include "core/rendering/svg/RenderSVGModelObject.h"
 
 #include "SVGNames.h"
+#include "core/rendering/svg/RenderSVGRoot.h"
 #include "core/rendering/svg/SVGResourcesCache.h"
 #include "core/svg/SVGStyledElement.h"
 
 namespace WebCore {
 
 RenderSVGModelObject::RenderSVGModelObject(SVGStyledElement* node)
     : RenderObject(node)
     , m_hasSVGShadow(false)
 {
 }
@@ skipping 41 matching lines @@
 {
     quads.append(localToAbsoluteQuad(strokeBoundingBox(), 0 /* mode */, wasFixed));
 }
 
 void RenderSVGModelObject::willBeDestroyed()
 {
     SVGResourcesCache::clientDestroyed(this);
     RenderObject::willBeDestroyed();
 }
 
+void RenderSVGModelObject::computeLayerHitTestRects(LayerHitTestRects& rects) const
+{
+    // Using just the rect for the SVGRoot is good enough for now.
+    SVGRenderSupport::findTreeRootObject(this)->computeLayerHitTestRects(rects);
+}
+
+void RenderSVGModelObject::addLayerHitTestRects(LayerHitTestRects&, const RenderLayer* currentLayer, const LayoutPoint& layerOffset) const
+{
+    // We don't walk into SVG trees at all - just report their container.
+}
+
 void RenderSVGModelObject::styleWillChange(StyleDifference diff, const RenderStyle* newStyle)
 {
     if (diff == StyleDifferenceLayout) {
         setNeedsBoundariesUpdate();
         if (newStyle->hasTransform())
             setNeedsTransformUpdate();
     }
     RenderObject::styleWillChange(diff, newStyle);
 }
 
@@ skipping 83 matching lines @@
     if (!isGraphicsElement(renderer))
         return false;
     AffineTransform ctm;
     SVGElement* svgElement = toSVGElement(renderer->node());
     getElementCTM(svgElement, ctm);
     ASSERT(svgElement->renderer());
     return rect.contains(ctm.mapRect(svgElement->renderer()->repaintRectInLocalCoordinates()));
 }
 
 } // namespace WebCore