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
34 namespace WebCore {
35
HTMLPlugInImageElement(const QualifiedName & tagName,Document * document,bool createdByParser,PreferPlugInsForImagesOption preferPlugInsForImagesOption)36 HTMLPlugInImageElement::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
renderEmbeddedObject() const47 RenderEmbeddedObject* 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
isImageType()56 bool 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.
allowedToLoadFrameURL(const String & url)71 bool 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.
wouldLoadAsNetscapePlugin(const String & url,const String & serviceType)94 bool 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
createRenderer(RenderArena * arena,RenderStyle * style)109 RenderObject* 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
recalcStyle(StyleChange ch)124 void 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
attach()134 void 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
detach()150 void 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
updateWidgetIfNecessary()161 void 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
finishParsingChildren()174 void HTMLPlugInImageElement::finishParsingChildren()
175 {
176 HTMLPlugInElement::finishParsingChildren();
177 if (useFallbackContent())
178 return;
179
180 setNeedsWidgetUpdate(true);
181 if (inDocument())
182 setNeedsStyleRecalc();
183 }
184
willMoveToNewOwnerDocument()185 void HTMLPlugInImageElement::willMoveToNewOwnerDocument()
186 {
187 if (m_imageLoader)
188 m_imageLoader->elementWillMoveToNewOwnerDocument();
189 HTMLPlugInElement::willMoveToNewOwnerDocument();
190 }
191
updateWidgetCallback(Node * n)192 void HTMLPlugInImageElement::updateWidgetCallback(Node* n)
193 {
194 static_cast<HTMLPlugInImageElement*>(n)->updateWidgetIfNecessary();
195 }
196
197 } // namespace WebCore
198