Region ScrollingCoordinator::computeNonFastScrollableRegion(const Frame* frame, const IntPoint& frameLocation) const
{
#if ENABLE(IOS_TOUCH_EVENTS)
// On iOS, we use nonFastScrollableRegion to represent the region covered by elements with touch event handlers.
ASSERT(frame->isMainFrame());
UNUSED_PARAM(frameLocation);
Document* document = frame->document();
if (!document)
return Region();
Vector<IntRect> touchRects;
document->getTouchRects(touchRects);
Region touchRegion;
for (const auto& rect : touchRects)
touchRegion.unite(rect);
return touchRegion;
#else
Region nonFastScrollableRegion;
FrameView* frameView = frame->view();
if (!frameView)
return nonFastScrollableRegion;
IntPoint offset = frameLocation;
offset.moveBy(frameView->frameRect().location());
offset.move(0, frameView->topContentInset());
if (const FrameView::ScrollableAreaSet* scrollableAreas = frameView->scrollableAreas()) {
for (FrameView::ScrollableAreaSet::const_iterator it = scrollableAreas->begin(), end = scrollableAreas->end(); it != end; ++it) {
ScrollableArea* scrollableArea = *it;
// Composited scrollable areas can be scrolled off the main thread.
if (scrollableArea->usesCompositedScrolling())
continue;
IntRect box = scrollableArea->scrollableAreaBoundingBox();
box.moveBy(offset);
nonFastScrollableRegion.unite(box);
}
}
for (const auto& child : frameView->children()) {
if (!child->isPluginViewBase())
continue;
PluginViewBase* pluginViewBase = toPluginViewBase(child.get());
if (pluginViewBase->wantsWheelEvents())
nonFastScrollableRegion.unite(pluginViewBase->frameRect());
}
for (Frame* subframe = frame->tree().firstChild(); subframe; subframe = subframe->tree().nextSibling())
nonFastScrollableRegion.unite(computeNonFastScrollableRegion(subframe, offset));
return nonFastScrollableRegion;
#endif
}
// 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);
}
Region ScrollingCoordinator::computeNonFastScrollableRegion(const Frame* frame, const IntPoint& frameLocation) const
{
Region nonFastScrollableRegion;
FrameView* frameView = frame->view();
if (!frameView)
return nonFastScrollableRegion;
IntPoint offset = frameLocation;
offset.moveBy(frameView->frameRect().location());
if (const FrameView::ScrollableAreaSet* scrollableAreas = frameView->scrollableAreas()) {
for (FrameView::ScrollableAreaSet::const_iterator it = scrollableAreas->begin(), end = scrollableAreas->end(); it != end; ++it) {
ScrollableArea* scrollableArea = *it;
#if USE(ACCELERATED_COMPOSITING)
// Composited scrollable areas can be scrolled off the main thread.
if (scrollableArea->usesCompositedScrolling())
continue;
#endif
IntRect box = scrollableArea->scrollableAreaBoundingBox();
box.moveBy(offset);
nonFastScrollableRegion.unite(box);
}
}
for (auto it = frameView->children().begin(), end = frameView->children().end(); it != end; ++it) {
if (!(*it)->isPluginViewBase())
continue;
PluginViewBase* pluginViewBase = toPluginViewBase((*it).get());
if (pluginViewBase->wantsWheelEvents())
nonFastScrollableRegion.unite(pluginViewBase->frameRect());
}
for (Frame* subframe = frame->tree().firstChild(); subframe; subframe = subframe->tree().nextSibling())
nonFastScrollableRegion.unite(computeNonFastScrollableRegion(subframe, offset));
return nonFastScrollableRegion;
}
// 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));
}
}
}
}
void Page::collectPluginViews(Vector<RefPtr<PluginViewBase>, 32>& pluginViewBases)
{
for (Frame* frame = mainFrame(); frame; frame = frame->tree()->traverseNext()) {
FrameView* view = frame->view();
if (!view)
return;
const HashSet<RefPtr<Widget> >* children = view->children();
ASSERT(children);
HashSet<RefPtr<Widget> >::const_iterator end = children->end();
for (HashSet<RefPtr<Widget> >::const_iterator it = children->begin(); it != end; ++it) {
Widget* widget = (*it).get();
if (widget->isPluginViewBase())
pluginViewBases.append(toPluginViewBase(widget));
}
}
}