void ScrollView::scrollTo(const IntSize& newOffset)
{
IntSize scrollDelta = newOffset - m_scrollOffset;
if (scrollDelta == IntSize())
return;
m_scrollOffset = newOffset;
#if PLATFORM(ANDROID)
if (parent()) {
FrameView* frameView = this->frameView();
// IFrames are composited on a layer, we do not need to repaint them
// when scrolling
if (frameView) {
RenderView* renderer = frameView->frame()->contentRenderer();
if (renderer) {
RenderLayer* layer = renderer->layer();
if (layer->backing()) {
GraphicsLayerAndroid* backing = static_cast<GraphicsLayerAndroid*>(
layer->backing()->graphicsLayer());
backing->updateScrollOffset();
}
}
return;
}
}
#endif
if (scrollbarsSuppressed())
return;
repaintFixedElementsAfterScrolling();
scrollContents(scrollDelta);
}
void GraphicsLayerAndroid::gatherRootLayers(Vector<const RenderLayer*>& list)
{
RenderLayer* renderLayer = renderLayerFromClient(m_client);
if (renderLayer) {
const RenderLayer* rootLayer = renderLayer->root();
bool found = false;
for (unsigned int i = 0; i < list.size(); i++) {
const RenderLayer* current = list[i];
if (current == rootLayer) {
found = true;
break;
}
}
if (!found)
list.append(rootLayer);
}
for (unsigned int i = 0; i < m_children.size(); i++) {
GraphicsLayerAndroid* layer = static_cast<GraphicsLayerAndroid*>(m_children[i]);
layer->gatherRootLayers(list);
}
}
WebCore::GraphicsLayer* ChromeClientAndroid::layersSync()
{
if (m_rootGraphicsLayer && m_needsLayerSync && m_webFrame) {
// We may have more than one frame, so let's first update all of them
// (webkit may want to update the GraphicsLayer tree, and we do *not* want
// to find this out when we are painting, as it means we could be summarily
// deallocated while painting...)
GraphicsLayerAndroid* rootLayer = static_cast<GraphicsLayerAndroid*>(m_rootGraphicsLayer);
Vector<const RenderLayer*> listRootLayers;
rootLayer->gatherRootLayers(listRootLayers);
for (unsigned int i = 0; i < listRootLayers.size(); i++) {
RenderLayer* layer = const_cast<RenderLayer*>(listRootLayers[i]);
layer->compositor()->updateCompositingLayers();
}
Frame* frame = m_webFrame->page()->mainFrame();
if (FrameView* frameView = frame->view())
frameView->syncCompositingStateIncludingSubframes();
}
m_needsLayerSync = false;
return m_rootGraphicsLayer;
}
