2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 * (C) 2000 Simon Hausmann <hausmann@kde.org>
4 * (C) 2000 Stefan Schimanski (1Stein@gmx.de)
5 * Copyright (C) 2004, 2005, 2006, 2009 Apple Inc. All rights reserved.
6 * Copyright (C) Research In Motion Limited 2011. All rights reserved.
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public License
19 * along with this library; see the file COPYING.LIB. If not, write to
20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
26 #include "core/rendering/RenderPart.h"
28 #include "core/frame/FrameView.h"
29 #include "core/frame/LocalFrame.h"
30 #include "core/html/HTMLFrameElementBase.h"
31 #include "core/plugins/PluginView.h"
32 #include "core/rendering/HitTestResult.h"
33 #include "core/rendering/RenderLayer.h"
34 #include "core/rendering/RenderView.h"
35 #include "core/rendering/svg/RenderSVGRoot.h"
41 RenderPart::RenderPart(Element* node)
47 RenderPart::~RenderPart()
51 LayerType RenderPart::layerTypeRequired() const
53 LayerType type = RenderWidget::layerTypeRequired();
57 return requiresAcceleratedCompositing() ? NormalLayer : NoLayer;
60 bool RenderPart::requiresAcceleratedCompositing() const
62 // There are two general cases in which we can return true. First, if this is a plugin
63 // renderer and the plugin has a layer, then we need a layer. Second, if this is
64 // a renderer with a contentDocument and that document needs a layer, then we need
66 if (widget() && widget()->isPluginView() && toPluginView(widget())->platformLayer())
69 if (!node() || !node()->isFrameOwnerElement())
72 HTMLFrameOwnerElement* element = toHTMLFrameOwnerElement(node());
73 if (element->contentFrame() && element->contentFrame()->remotePlatformLayer())
76 if (Document* contentDocument = element->contentDocument()) {
77 if (RenderView* view = contentDocument->renderView())
78 return view->usesCompositing();
84 bool RenderPart::needsPreferredWidthsRecalculation() const
86 if (RenderWidget::needsPreferredWidthsRecalculation())
88 return embeddedContentBox();
91 bool RenderPart::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction action)
93 if (!widget() || !widget()->isFrameView() || !request.allowsChildFrameContent())
94 return RenderWidget::nodeAtPoint(request, result, locationInContainer, accumulatedOffset, action);
96 // FIXME: Until RemoteFrames use RemoteFrameViews, we need an explicit check here.
97 if (toFrameView(widget())->frame().isRemoteFrameTemporary())
98 return RenderWidget::nodeAtPoint(request, result, locationInContainer, accumulatedOffset, action);
100 FrameView* childFrameView = toFrameView(widget());
101 RenderView* childRoot = childFrameView->renderView();
104 LayoutPoint adjustedLocation = accumulatedOffset + location();
105 LayoutPoint contentOffset = LayoutPoint(borderLeft() + paddingLeft(), borderTop() + paddingTop()) - childFrameView->scrollOffset();
106 HitTestLocation newHitTestLocation(locationInContainer, -adjustedLocation - contentOffset);
107 HitTestRequest newHitTestRequest(request.type() | HitTestRequest::ChildFrameHitTest);
108 HitTestResult childFrameResult(newHitTestLocation);
110 bool isInsideChildFrame = childRoot->hitTest(newHitTestRequest, newHitTestLocation, childFrameResult);
112 if (newHitTestLocation.isRectBasedTest())
113 result.append(childFrameResult);
114 else if (isInsideChildFrame)
115 result = childFrameResult;
117 if (isInsideChildFrame)
120 if (request.allowsFrameScrollbars()) {
121 // ScrollView scrollbars are not the same as RenderLayer scrollbars tested by RenderLayer::hitTestOverflowControls,
122 // so we need to test ScrollView scrollbars separately here.
123 // FIXME: Consider if this test could be done unconditionally.
124 Scrollbar* frameScrollbar = childFrameView->scrollbarAtPoint(newHitTestLocation.roundedPoint());
126 result.setScrollbar(frameScrollbar);
130 return RenderWidget::nodeAtPoint(request, result, locationInContainer, accumulatedOffset, action);
133 CompositingReasons RenderPart::additionalCompositingReasons(CompositingTriggerFlags) const
135 if (requiresAcceleratedCompositing())
136 return CompositingReasonIFrame;
137 return CompositingReasonNone;