blob: 33db879892691d68b3f0ce64515ea8630b8b1be1 [file] [log] [blame]
* Copyright (C) 1999 Lars Knoll (
* (C) 2000 Simon Hausmann <>
* (C) 2000 Stefan Schimanski (
* Copyright (C) 2004, 2005, 2006, 2009 Apple Inc. All rights reserved.
* Copyright (C) Research In Motion Limited 2011. All rights reserved.
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* Library General Public License for more details.
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
#include "config.h"
#include "core/rendering/RenderPart.h"
#include "core/html/HTMLFrameElementBase.h"
#include "core/frame/FrameView.h"
#include "core/plugins/PluginView.h"
#include "core/rendering/HitTestResult.h"
#include "core/rendering/RenderLayer.h"
#include "core/rendering/RenderView.h"
#include "core/rendering/svg/RenderSVGRoot.h"
using namespace std;
namespace WebCore {
RenderPart::RenderPart(Element* node)
: RenderWidget(node)
void RenderPart::setWidget(PassRefPtr<Widget> widget)
if (widget == this->widget())
// make sure the scrollbars are set correctly for restore
// ### find better fix
void RenderPart::viewCleared()
bool RenderPart::requiresLayer() const
if (RenderWidget::requiresLayer())
return true;
return requiresAcceleratedCompositing();
bool RenderPart::requiresAcceleratedCompositing() const
// There are two general cases in which we can return true. First, if this is a plugin
// renderer and the plugin has a layer, then we need a layer. Second, if this is
// a renderer with a contentDocument and that document needs a layer, then we need
// a layer.
if (widget() && widget()->isPluginView() && toPluginView(widget())->platformLayer())
return true;
if (!node() || !node()->isFrameOwnerElement())
return false;
HTMLFrameOwnerElement* element = toHTMLFrameOwnerElement(node());
if (Document* contentDocument = element->contentDocument()) {
if (RenderView* view = contentDocument->renderView())
return view->usesCompositing();
return false;
bool RenderPart::needsPreferredWidthsRecalculation() const
if (RenderWidget::needsPreferredWidthsRecalculation())
return true;
return embeddedContentBox();
RenderBox* RenderPart::embeddedContentBox() const
if (!node() || !widget() || !widget()->isFrameView())
return 0;
return toFrameView(widget())->embeddedContentBox();
bool RenderPart::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction action)
if (!widget() || !widget()->isFrameView() || !request.allowsChildFrameContent())
return RenderWidget::nodeAtPoint(request, result, locationInContainer, accumulatedOffset, action);
FrameView* childFrameView = toFrameView(widget());
RenderView* childRoot = childFrameView->renderView();
if (childRoot) {
LayoutPoint adjustedLocation = accumulatedOffset + location();
LayoutPoint contentOffset = LayoutPoint(borderLeft() + paddingLeft(), borderTop() + paddingTop()) - childFrameView->scrollOffset();
HitTestLocation newHitTestLocation(locationInContainer, -adjustedLocation - contentOffset);
HitTestRequest newHitTestRequest(request.type() | HitTestRequest::ChildFrameHitTest);
HitTestResult childFrameResult(newHitTestLocation);
bool isInsideChildFrame = childRoot->hitTest(newHitTestRequest, newHitTestLocation, childFrameResult);
if (newHitTestLocation.isRectBasedTest())
else if (isInsideChildFrame)
result = childFrameResult;
if (isInsideChildFrame)
return true;
if (request.allowsFrameScrollbars()) {
// ScrollView scrollbars are not the same as RenderLayer scrollbars tested by RenderLayer::hitTestOverflowControls,
// so we need to test ScrollView scrollbars separately here.
// FIXME: Consider if this test could be done unconditionally.
Scrollbar* frameScrollbar = childFrameView->scrollbarAtPoint(newHitTestLocation.roundedPoint());
if (frameScrollbar)
return RenderWidget::nodeAtPoint(request, result, locationInContainer, accumulatedOffset, action);