1/* 2 * Copyright (C) 2008, 2011 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 "HTMLPlugInImageElement.h" 23 24#include "Frame.h" 25#include "FrameLoader.h" 26#include "FrameLoaderClient.h" 27#include "HTMLImageLoader.h" 28#include "HTMLNames.h" 29#include "Image.h" 30#include "Page.h" 31#include "RenderEmbeddedObject.h" 32#include "RenderImage.h" 33 34namespace WebCore { 35 36HTMLPlugInImageElement::HTMLPlugInImageElement(const QualifiedName& tagName, Document* document, bool createdByParser, PreferPlugInsForImagesOption preferPlugInsForImagesOption) 37 : HTMLPlugInElement(tagName, document) 38 // m_needsWidgetUpdate(!createdByParser) allows HTMLObjectElement to delay 39 // widget updates until after all children are parsed. For HTMLEmbedElement 40 // this delay is unnecessary, but it is simpler to make both classes share 41 // the same codepath in this class. 42 , m_needsWidgetUpdate(!createdByParser) 43 , m_shouldPreferPlugInsForImages(preferPlugInsForImagesOption == ShouldPreferPlugInsForImages) 44{ 45} 46 47RenderEmbeddedObject* HTMLPlugInImageElement::renderEmbeddedObject() const 48{ 49 // HTMLObjectElement and HTMLEmbedElement may return arbitrary renderers 50 // when using fallback content. 51 if (!renderer() || !renderer()->isEmbeddedObject()) 52 return 0; 53 return toRenderEmbeddedObject(renderer()); 54} 55 56bool HTMLPlugInImageElement::isImageType() 57{ 58 if (m_serviceType.isEmpty() && protocolIs(m_url, "data")) 59 m_serviceType = mimeTypeFromDataURL(m_url); 60 61 if (Frame* frame = document()->frame()) { 62 KURL completedURL = frame->loader()->completeURL(m_url); 63 return frame->loader()->client()->objectContentType(completedURL, m_serviceType, shouldPreferPlugInsForImages()) == ObjectContentImage; 64 } 65 66 return Image::supportsType(m_serviceType); 67} 68 69// We don't use m_url, as it may not be the final URL that the object loads, 70// depending on <param> values. 71bool HTMLPlugInImageElement::allowedToLoadFrameURL(const String& url) 72{ 73 ASSERT(document()); 74 ASSERT(document()->frame()); 75 if (document()->frame()->page()->frameCount() >= Page::maxNumberOfFrames) 76 return false; 77 78 // We allow one level of self-reference because some sites depend on that. 79 // But we don't allow more than one. 80 KURL completeURL = document()->completeURL(url); 81 bool foundSelfReference = false; 82 for (Frame* frame = document()->frame(); frame; frame = frame->tree()->parent()) { 83 if (equalIgnoringFragmentIdentifier(frame->document()->url(), completeURL)) { 84 if (foundSelfReference) 85 return false; 86 foundSelfReference = true; 87 } 88 } 89 return true; 90} 91 92// We don't use m_url, or m_serviceType as they may not be the final values 93// that <object> uses depending on <param> values. 94bool HTMLPlugInImageElement::wouldLoadAsNetscapePlugin(const String& url, const String& serviceType) 95{ 96 ASSERT(document()); 97 ASSERT(document()->frame()); 98 FrameLoader* frameLoader = document()->frame()->loader(); 99 ASSERT(frameLoader); 100 KURL completedURL; 101 if (!url.isEmpty()) 102 completedURL = frameLoader->completeURL(url); 103 104 if (frameLoader->client()->objectContentType(completedURL, serviceType, shouldPreferPlugInsForImages()) == ObjectContentNetscapePlugin) 105 return true; 106 return false; 107} 108 109RenderObject* HTMLPlugInImageElement::createRenderer(RenderArena* arena, RenderStyle* style) 110{ 111 // Fallback content breaks the DOM->Renderer class relationship of this 112 // class and all superclasses because createObject won't necessarily 113 // return a RenderEmbeddedObject, RenderPart or even RenderWidget. 114 if (useFallbackContent()) 115 return RenderObject::createObject(this, style); 116 if (isImageType()) { 117 RenderImage* image = new (arena) RenderImage(this); 118 image->setImageResource(RenderImageResource::create()); 119 return image; 120 } 121 return new (arena) RenderEmbeddedObject(this); 122} 123 124void HTMLPlugInImageElement::recalcStyle(StyleChange ch) 125{ 126 // FIXME: Why is this necessary? Manual re-attach is almost always wrong. 127 if (!useFallbackContent() && needsWidgetUpdate() && renderer() && !isImageType()) { 128 detach(); 129 attach(); 130 } 131 HTMLPlugInElement::recalcStyle(ch); 132} 133 134void HTMLPlugInImageElement::attach() 135{ 136 bool isImage = isImageType(); 137 138 if (!isImage) 139 queuePostAttachCallback(&HTMLPlugInImageElement::updateWidgetCallback, this); 140 141 HTMLPlugInElement::attach(); 142 143 if (isImage && renderer() && !useFallbackContent()) { 144 if (!m_imageLoader) 145 m_imageLoader = adoptPtr(new HTMLImageLoader(this)); 146 m_imageLoader->updateFromElement(); 147 } 148} 149 150void HTMLPlugInImageElement::detach() 151{ 152 // FIXME: Because of the insanity that is HTMLPlugInImageElement::recalcStyle, 153 // we can end up detaching during an attach() call, before we even have a 154 // renderer. In that case, don't mark the widget for update. 155 if (attached() && renderer() && !useFallbackContent()) 156 // Update the widget the next time we attach (detaching destroys the plugin). 157 setNeedsWidgetUpdate(true); 158 HTMLPlugInElement::detach(); 159} 160 161void HTMLPlugInImageElement::updateWidgetIfNecessary() 162{ 163 document()->updateStyleIfNeeded(); 164 165 if (!needsWidgetUpdate() || useFallbackContent() || isImageType()) 166 return; 167 168 if (!renderEmbeddedObject() || renderEmbeddedObject()->pluginCrashedOrWasMissing()) 169 return; 170 171 updateWidget(CreateOnlyNonNetscapePlugins); 172} 173 174void HTMLPlugInImageElement::finishParsingChildren() 175{ 176 HTMLPlugInElement::finishParsingChildren(); 177 if (useFallbackContent()) 178 return; 179 180 setNeedsWidgetUpdate(true); 181 if (inDocument()) 182 setNeedsStyleRecalc(); 183} 184 185void HTMLPlugInImageElement::willMoveToNewOwnerDocument() 186{ 187 if (m_imageLoader) 188 m_imageLoader->elementWillMoveToNewOwnerDocument(); 189 HTMLPlugInElement::willMoveToNewOwnerDocument(); 190} 191 192void HTMLPlugInImageElement::updateWidgetCallback(Node* n) 193{ 194 static_cast<HTMLPlugInImageElement*>(n)->updateWidgetIfNecessary(); 195} 196 197} // namespace WebCore 198