// Return a set of rectangles that should not be overdrawn by the
// plugin ("cutouts"). This helps implement the "iframe shim"
// technique of overlaying a windowed plugin with content from the
// page. In a nutshell, iframe elements should occlude plugins when
// they occur higher in the stacking order.
void getPluginOcclusions(Element* element, Widget* parentWidget, const IntRect& frameRect, Vector<IntRect>& occlusions)
{
RenderObject* pluginNode = element->renderer();
ASSERT(pluginNode);
if (!pluginNode->style())
return;
Vector<const RenderObject*> pluginZstack;
Vector<const RenderObject*> iframeZstack;
getObjectStack(pluginNode, &pluginZstack);
if (!parentWidget->isFrameView())
return;
FrameView* parentFrameView = toFrameView(parentWidget);
// Occlusions by iframes.
const FrameView::ChildrenWidgetSet* children = parentFrameView->children();
for (FrameView::ChildrenWidgetSet::const_iterator it = children->begin(); it != children->end(); ++it) {
// We only care about FrameView's because iframes show up as FrameViews.
if (!(*it)->isFrameView())
continue;
const FrameView* frameView = toFrameView(it->get());
// Check to make sure we can get both the element and the RenderObject
// for this FrameView, if we can't just move on to the next object.
// FIXME: Plugin occlusion by remote frames is probably broken.
HTMLElement* element = frameView->frame().deprecatedLocalOwner();
if (!element || !element->renderer())
continue;
RenderObject* iframeRenderer = element->renderer();
if (isHTMLIFrameElement(*element) && intersectsRect(iframeRenderer, frameRect)) {
getObjectStack(iframeRenderer, &iframeZstack);
if (iframeIsAbovePlugin(iframeZstack, pluginZstack))
addToOcclusions(toRenderBox(iframeRenderer), occlusions);
}
}
// Occlusions by top layer elements.
// FIXME: There's no handling yet for the interaction between top layer and
// iframes. For example, a plugin in the top layer will be occluded by an
// iframe. And a plugin inside an iframe in the top layer won't be respected
// as being in the top layer.
const Element* ancestor = topLayerAncestor(element);
Document* document = parentFrameView->frame().document();
const WillBeHeapVector<RefPtrWillBeMember<Element> >& elements = document->topLayerElements();
size_t start = ancestor ? elements.find(ancestor) + 1 : 0;
for (size_t i = start; i < elements.size(); ++i)
addTreeToOcclusions(elements[i]->renderer(), frameRect, occlusions);
}
// Return a set of rectangles that should not be overdrawn by the
// plugin ("cutouts"). This helps implement the "iframe shim"
// technique of overlaying a windowed plugin with content from the
// page. In a nutshell, iframe elements should occlude plugins when
// they occur higher in the stacking order.
void WebPluginContainerImpl::windowCutOutRects(const IntRect& frameRect,
Vector<IntRect>& cutOutRects)
{
RenderObject* pluginNode = m_element->renderer();
ASSERT(pluginNode);
if (!pluginNode->style())
return;
Vector<const RenderObject*> pluginZstack;
Vector<const RenderObject*> iframeZstack;
getObjectStack(pluginNode, &pluginZstack);
// Get the parent widget
Widget* parentWidget = this->parent();
if (!parentWidget->isFrameView())
return;
FrameView* parentFrameView = static_cast<FrameView*>(parentWidget);
const HashSet<RefPtr<Widget> >* children = parentFrameView->children();
for (HashSet<RefPtr<Widget> >::const_iterator it = children->begin(); it != children->end(); ++it) {
// We only care about FrameView's because iframes show up as FrameViews.
if (!(*it)->isFrameView())
continue;
const FrameView* frameView =
static_cast<const FrameView*>((*it).get());
// Check to make sure we can get both the element and the RenderObject
// for this FrameView, if we can't just move on to the next object.
if (!frameView->frame() || !frameView->frame()->ownerElement()
|| !frameView->frame()->ownerElement()->renderer())
continue;
HTMLElement* element = frameView->frame()->ownerElement();
RenderObject* iframeRenderer = element->renderer();
if (element->hasTagName(HTMLNames::iframeTag)
&& iframeRenderer->absoluteBoundingBoxRect().intersects(frameRect)
&& (!iframeRenderer->style() || iframeRenderer->style()->visibility() == VISIBLE)) {
getObjectStack(iframeRenderer, &iframeZstack);
if (checkStackOnTop(iframeZstack, pluginZstack)) {
IntPoint point =
roundedIntPoint(iframeRenderer->localToAbsolute());
RenderBox* rbox = toRenderBox(iframeRenderer);
IntSize size(rbox->width(), rbox->height());
cutOutRects.append(IntRect(point, size));
}
}
}
}
