1/* 2 * Copyright (C) 2006, 2007, 2009 Apple Inc. All rights reserved. 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public License 15 * along with this library; see the file COPYING.LIB. If not, write to 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 * 19 */ 20 21#include "config.h" 22#include "HTMLFrameOwnerElement.h" 23 24#include "DOMWindow.h" 25#include "ExceptionCode.h" 26#include "Frame.h" 27#include "FrameLoader.h" 28#include "RenderWidget.h" 29#include "ShadowRoot.h" 30#include "SVGDocument.h" 31#include <wtf/Ref.h> 32 33namespace WebCore { 34 35HTMLFrameOwnerElement::HTMLFrameOwnerElement(const QualifiedName& tagName, Document& document) 36 : HTMLElement(tagName, document) 37 , m_contentFrame(0) 38 , m_sandboxFlags(SandboxNone) 39{ 40} 41 42RenderWidget* HTMLFrameOwnerElement::renderWidget() const 43{ 44 // HTMLObjectElement and HTMLEmbedElement may return arbitrary renderers 45 // when using fallback content. 46 if (!renderer() || !renderer()->isWidget()) 47 return 0; 48 return toRenderWidget(renderer()); 49} 50 51void HTMLFrameOwnerElement::setContentFrame(Frame* frame) 52{ 53 // Make sure we will not end up with two frames referencing the same owner element. 54 ASSERT(!m_contentFrame || m_contentFrame->ownerElement() != this); 55 ASSERT(frame); 56 // Disconnected frames should not be allowed to load. 57 ASSERT(inDocument()); 58 m_contentFrame = frame; 59 60 for (ContainerNode* node = this; node; node = node->parentOrShadowHostNode()) 61 node->incrementConnectedSubframeCount(); 62} 63 64void HTMLFrameOwnerElement::clearContentFrame() 65{ 66 if (!m_contentFrame) 67 return; 68 69 m_contentFrame = 0; 70 71 for (ContainerNode* node = this; node; node = node->parentOrShadowHostNode()) 72 node->decrementConnectedSubframeCount(); 73} 74 75void HTMLFrameOwnerElement::disconnectContentFrame() 76{ 77 // FIXME: Currently we don't do this in removedFrom because this causes an 78 // unload event in the subframe which could execute script that could then 79 // reach up into this document and then attempt to look back down. We should 80 // see if this behavior is really needed as Gecko does not allow this. 81 if (Frame* frame = contentFrame()) { 82 Ref<Frame> protect(*frame); 83 frame->loader().frameDetached(); 84 frame->disconnectOwnerElement(); 85 } 86} 87 88HTMLFrameOwnerElement::~HTMLFrameOwnerElement() 89{ 90 if (m_contentFrame) 91 m_contentFrame->disconnectOwnerElement(); 92} 93 94Document* HTMLFrameOwnerElement::contentDocument() const 95{ 96 return m_contentFrame ? m_contentFrame->document() : 0; 97} 98 99DOMWindow* HTMLFrameOwnerElement::contentWindow() const 100{ 101 return m_contentFrame ? m_contentFrame->document()->domWindow() : 0; 102} 103 104void HTMLFrameOwnerElement::setSandboxFlags(SandboxFlags flags) 105{ 106 m_sandboxFlags = flags; 107} 108 109bool HTMLFrameOwnerElement::isKeyboardFocusable(KeyboardEvent* event) const 110{ 111 return m_contentFrame && HTMLElement::isKeyboardFocusable(event); 112} 113 114SVGDocument* HTMLFrameOwnerElement::getSVGDocument(ExceptionCode& ec) const 115{ 116 Document* doc = contentDocument(); 117 if (doc && doc->isSVGDocument()) 118 return toSVGDocument(doc); 119 // Spec: http://www.w3.org/TR/SVG/struct.html#InterfaceGetSVGDocument 120 ec = NOT_SUPPORTED_ERR; 121 return 0; 122} 123 124void HTMLFrameOwnerElement::scheduleSetNeedsStyleRecalc(StyleChangeType changeType) 125{ 126 if (Style::postResolutionCallbacksAreSuspended()) { 127 RefPtr<HTMLFrameOwnerElement> element = this; 128 Style::queuePostResolutionCallback([element, changeType]{ 129 element->setNeedsStyleRecalc(changeType); 130 }); 131 } else 132 setNeedsStyleRecalc(changeType); 133} 134 135bool SubframeLoadingDisabler::canLoadFrame(HTMLFrameOwnerElement& owner) 136{ 137 for (ContainerNode* node = &owner; node; node = node->parentOrShadowHostNode()) { 138 if (disabledSubtreeRoots().contains(node)) 139 return false; 140 } 141 return true; 142} 143 144} // namespace WebCore 145