RenderLayer* LinkHighlight::computeEnclosingCompositingLayer()
{
if (!m_node || !m_node->renderer())
return 0;
// Find the nearest enclosing composited layer and attach to it. We may need to cross frame boundaries
// to find a suitable layer.
RenderObject* renderer = m_node->renderer();
RenderLayerModelObject* repaintContainer;
do {
repaintContainer = renderer->containerForRepaint();
if (!repaintContainer) {
renderer = renderer->frame()->ownerRenderer();
if (!renderer)
return 0;
}
} while (!repaintContainer);
RenderLayer* renderLayer = repaintContainer->layer();
if (!renderLayer || renderLayer->compositingState() == NotComposited)
return 0;
GraphicsLayer* newGraphicsLayer = renderLayer->compositedLayerMapping()->mainGraphicsLayer();
m_clipLayer->setSublayerTransform(SkMatrix44());
if (!newGraphicsLayer->drawsContent()) {
if (renderLayer->scrollableArea()->usesCompositedScrolling()) {
ASSERT(renderLayer->hasCompositedLayerMapping() && renderLayer->compositedLayerMapping()->scrollingContentsLayer());
newGraphicsLayer = renderLayer->compositedLayerMapping()->scrollingContentsLayer();
} else
ASSERT_NOT_REACHED();
}
if (m_currentGraphicsLayer != newGraphicsLayer) {
if (m_currentGraphicsLayer)
clearGraphicsLayerLinkHighlightPointer();
m_currentGraphicsLayer = newGraphicsLayer;
m_currentGraphicsLayer->addLinkHighlight(this);
}
return renderLayer;
}
RenderSelectionInfoBase::RenderSelectionInfoBase(RenderObject& renderer)
: m_renderer(renderer)
, m_repaintContainer(renderer.containerForRepaint())
, m_state(renderer.selectionState())
{
}
