Add touchEventHandlerRegion to Layer and LayerImpl

These will be used to keep track of JavaScript touch event handler on the compositor thread
and will be updated accordingly when there is a change involving adding/removing or changing
the layout of the nodes that contain the touch event handlers.

BUG=135818


Review URL: https://chromiumcodereview.appspot.com/11377013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@166561 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 20 insertions, 0 deletions

diff --git a/webkit/compositor_bindings/web_layer_impl.cc b/webkit/compositor_bindings/web_layer_impl.cc
index 0fcb74f..9d3f137 100644
--- a/webkit/compositor_bindings/web_layer_impl.cc
+++ b/webkit/compositor_bindings/web_layer_impl.cc
@@ -410,6 +410,24 @@ WebVector<WebRect> WebLayerImpl::nonFastScrollableRegion() const
     return result;
 }
 
+void WebLayerImpl::setTouchEventHandlerRegion(const WebVector<WebRect>& rects)
+{
+  cc::Region region;
+  for (size_t i = 0; i < rects.size(); ++i)
+      region.Union(rects[i]);
+  m_layer->setTouchEventHandlerRegion(region);
+
+}
+
+WebVector<WebRect> WebLayerImpl::touchEventHandlerRegion() const
+{
+  cc::Region::Iterator regionRects(m_layer->touchEventHandlerRegion());
+  WebVector<WebRect> result(regionRects.size());
+  for (size_t i = 0; regionRects.has_rect(); regionRects.next(), ++i)
+      result[i] = regionRects.rect();
+  return result;
+}
+
 void WebLayerImpl::setIsContainerForFixedPositionLayers(bool enable)
 {
     m_layer->setIsContainerForFixedPositionLayers(enable);
diff --git a/webkit/compositor_bindings/web_layer_impl.h b/webkit/compositor_bindings/web_layer_impl.h
index 24304b3..639baf1 100644
--- a/webkit/compositor_bindings/web_layer_impl.h
+++ b/webkit/compositor_bindings/web_layer_impl.h
@@ -88,6 +88,8 @@ public:
     virtual bool shouldScrollOnMainThread() const;
     virtual void setNonFastScrollableRegion(const WebVector<WebRect>&) OVERRIDE;
     virtual WebVector<WebRect> nonFastScrollableRegion() const;
+    virtual void setTouchEventHandlerRegion(const WebVector<WebRect>&);
+    virtual WebVector<WebRect> touchEventHandlerRegion() const;
     virtual void setIsContainerForFixedPositionLayers(bool) OVERRIDE;
     virtual bool isContainerForFixedPositionLayers() const;
     virtual void setFixedToContainerLayer(bool) OVERRIDE;