Source/WebCore/html/HTMLEmbedElement.cpp - platform/external/webkit - Git at Google

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
  * Copyright (C) 2004, 2005, 2006, 2008, 2009, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * 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 "HTMLEmbedElement.h"

 #include "Attribute.h"
 #include "CSSPropertyNames.h"
 #include "DocumentLoader.h"
 #include "Frame.h"
 #include "HTMLDocument.h"
 #include "HTMLImageLoader.h"
 #include "HTMLNames.h"
 #include "HTMLObjectElement.h"
 #include "HTMLParserIdioms.h"
 #include "MainResourceLoader.h"
 #include "PluginDocument.h"
 #include "RenderEmbeddedObject.h"
 #include "RenderImage.h"
 #include "RenderWidget.h"
 #include "ScriptController.h"
 #include "Settings.h"

 namespace WebCore {

 using namespace HTMLNames;

 inline HTMLEmbedElement::HTMLEmbedElement(const QualifiedName& tagName, Document* document, bool createdByParser)
     : HTMLPlugInImageElement(tagName, document, createdByParser, ShouldPreferPlugInsForImages)
 {
     ASSERT(hasTagName(embedTag));
 }

 PassRefPtr<HTMLEmbedElement> HTMLEmbedElement::create(const QualifiedName& tagName, Document* document, bool createdByParser)
 {
     return adoptRef(new HTMLEmbedElement(tagName, document, createdByParser));
 }

 static inline RenderWidget* findWidgetRenderer(const Node* n)
 {
     if (!n->renderer())
         do
             n = n->parentNode();
         while (n && !n->hasTagName(objectTag));

     if (n && n->renderer() && n->renderer()->isWidget())
         return toRenderWidget(n->renderer());

     return 0;
 }

 RenderWidget* HTMLEmbedElement::renderWidgetForJSBindings() const
 {
     document()->updateLayoutIgnorePendingStylesheets();
     return findWidgetRenderer(this);
 }

 bool HTMLEmbedElement::mapToEntry(const QualifiedName& attrName, MappedAttributeEntry& result) const
 {
     if (attrName == hiddenAttr) {
         result = eUniversal;
         return false;
     }

     return HTMLPlugInImageElement::mapToEntry(attrName, result);
 }

 void HTMLEmbedElement::parseMappedAttribute(Attribute* attr)
 {
     const AtomicString& value = attr->value();

     if (attr->name() == typeAttr) {
         m_serviceType = value.string().lower();
         size_t pos = m_serviceType.find(";");
         if (pos != notFound)
             m_serviceType = m_serviceType.left(pos);
         if (!isImageType() && m_imageLoader)
             m_imageLoader.clear();
     } else if (attr->name() == codeAttr)
         m_url = stripLeadingAndTrailingHTMLSpaces(value.string());
     else if (attr->name() == srcAttr) {
         m_url = stripLeadingAndTrailingHTMLSpaces(value.string());
         if (renderer() && isImageType()) {
             if (!m_imageLoader)
                 m_imageLoader = adoptPtr(new HTMLImageLoader(this));
             m_imageLoader->updateFromElementIgnoringPreviousError();
         }
     } else if (attr->name() == hiddenAttr) {
         if (equalIgnoringCase(value.string(), "yes") || equalIgnoringCase(value.string(), "true")) {
             // FIXME: Not dynamic, since we add this but don't remove it, but it may be OK for now
             // that this rarely-used attribute won't work properly if you remove it.
             addCSSLength(attr, CSSPropertyWidth, "0");
             addCSSLength(attr, CSSPropertyHeight, "0");
         }
     } else if (attr->name() == nameAttr) {
         if (inDocument() && document()->isHTMLDocument()) {
             HTMLDocument* document = static_cast<HTMLDocument*>(this->document());
             document->removeNamedItem(m_name);
             document->addNamedItem(value);
         }
         m_name = value;
     } else
         HTMLPlugInImageElement::parseMappedAttribute(attr);
 }

 void HTMLEmbedElement::parametersForPlugin(Vector<String>& paramNames, Vector<String>& paramValues)
 {
     NamedNodeMap* attributes = this->attributes(true);
     if (!attributes)
         return;

     for (unsigned i = 0; i < attributes->length(); ++i) {
         Attribute* it = attributes->attributeItem(i);
         paramNames.append(it->localName().string());
         paramValues.append(it->value().string());
     }
 }

 // FIXME: This should be unified with HTMLObjectElement::updateWidget and
 // moved down into HTMLPluginImageElement.cpp
 void HTMLEmbedElement::updateWidget(PluginCreationOption pluginCreationOption)
 {
     ASSERT(!renderEmbeddedObject()->pluginCrashedOrWasMissing());
     // FIXME: We should ASSERT(needsWidgetUpdate()), but currently
     // FrameView::updateWidget() calls updateWidget(false) without checking if
     // the widget actually needs updating!
     setNeedsWidgetUpdate(false);

     if (m_url.isEmpty() && m_serviceType.isEmpty())
         return;

     // Note these pass m_url and m_serviceType to allow better code sharing with
     // <object> which modifies url and serviceType before calling these.
     if (!allowedToLoadFrameURL(m_url))
         return;
     // FIXME: It's sadness that we have this special case here.
     //        See http://trac.webkit.org/changeset/25128 and
     //        plugins/netscape-plugin-setwindow-size.html
     if (pluginCreationOption == CreateOnlyNonNetscapePlugins && wouldLoadAsNetscapePlugin(m_url, m_serviceType))
         return;

     // FIXME: These should be joined into a PluginParameters class.
     Vector<String> paramNames;
     Vector<String> paramValues;
     parametersForPlugin(paramNames, paramValues);

     ASSERT(!m_inBeforeLoadEventHandler);
     m_inBeforeLoadEventHandler = true;
     bool beforeLoadAllowedLoad = dispatchBeforeLoadEvent(m_url);
     m_inBeforeLoadEventHandler = false;

     if (!beforeLoadAllowedLoad) {
         if (document()->isPluginDocument()) {
             // Plugins inside plugin documents load differently than other plugins. By the time
             // we are here in a plugin document, the load of the plugin (which is the plugin document's
             // main resource) has already started. We need to explicitly cancel the main resource load here.
             toPluginDocument(document())->cancelManualPluginLoad();
         }
         return;
     }

     SubframeLoader* loader = document()->frame()->loader()->subframeLoader();
     // FIXME: beforeLoad could have detached the renderer!  Just like in the <object> case above.
     loader->requestObject(this, m_url, getAttribute(nameAttr), m_serviceType, paramNames, paramValues);
 }

 bool HTMLEmbedElement::rendererIsNeeded(RenderStyle* style)
 {
     if (isImageType())
         return HTMLPlugInImageElement::rendererIsNeeded(style);

     Frame* frame = document()->frame();
     if (!frame)
         return false;

     // If my parent is an <object> and is not set to use fallback content, I
     // should be ignored and not get a renderer.
     ContainerNode* p = parentNode();
     if (p && p->hasTagName(objectTag)) {
         ASSERT(p->renderer());
         if (!static_cast<HTMLObjectElement*>(p)->useFallbackContent()) {
             ASSERT(!p->renderer()->isEmbeddedObject());
             return false;
         }
     }

 #if ENABLE(DASHBOARD_SUPPORT)
     // Workaround for <rdar://problem/6642221>.
     if (Settings* settings = frame->settings()) {
         if (settings->usesDashboardBackwardCompatibilityMode())
             return true;
     }
 #endif

     return HTMLPlugInImageElement::rendererIsNeeded(style);
 }

 void HTMLEmbedElement::insertedIntoDocument()
 {
     HTMLPlugInImageElement::insertedIntoDocument();
     if (!inDocument())
         return;

     if (document()->isHTMLDocument())
         static_cast<HTMLDocument*>(document())->addNamedItem(m_name);

     String width = getAttribute(widthAttr);
     String height = getAttribute(heightAttr);
     if (!width.isEmpty() || !height.isEmpty()) {
         Node* n = parentNode();
         while (n && !n->hasTagName(objectTag))
             n = n->parentNode();
         if (n) {
             if (!width.isEmpty())
                 static_cast<HTMLObjectElement*>(n)->setAttribute(widthAttr, width);
             if (!height.isEmpty())
                 static_cast<HTMLObjectElement*>(n)->setAttribute(heightAttr, height);
         }
     }
 }

 void HTMLEmbedElement::removedFromDocument()
 {
     if (document()->isHTMLDocument())
         static_cast<HTMLDocument*>(document())->removeNamedItem(m_name);

     HTMLPlugInImageElement::removedFromDocument();
 }

 void HTMLEmbedElement::attributeChanged(Attribute* attr, bool preserveDecls)
 {
     HTMLPlugInImageElement::attributeChanged(attr, preserveDecls);

     if ((attr->name() == widthAttr || attr->name() == heightAttr) && !attr->isEmpty()) {
         ContainerNode* n = parentNode();
         while (n && !n->hasTagName(objectTag))
             n = n->parentNode();
         if (n)
             static_cast<HTMLObjectElement*>(n)->setAttribute(attr->name(), attr->value());
     }
 }

 bool HTMLEmbedElement::isURLAttribute(Attribute* attr) const
 {
     return attr->name() == srcAttr;
 }

 const QualifiedName& HTMLEmbedElement::imageSourceAttributeName() const
 {
     return srcAttr;
 }

 void HTMLEmbedElement::addSubresourceAttributeURLs(ListHashSet<KURL>& urls) const
 {
     HTMLPlugInImageElement::addSubresourceAttributeURLs(urls);

     addSubresourceURL(urls, document()->completeURL(getAttribute(srcAttr)));
 }

 }
	/*
	* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
	* (C) 1999 Antti Koivisto (koivisto@kde.org)
	* (C) 2000 Stefan Schimanski (1Stein@gmx.de)
	* Copyright (C) 2004, 2005, 2006, 2008, 2009, 2011 Apple Inc. All rights reserved.
	* Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
	*
	* 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
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* 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 "HTMLEmbedElement.h"

	#include "Attribute.h"
	#include "CSSPropertyNames.h"
	#include "DocumentLoader.h"
	#include "Frame.h"
	#include "HTMLDocument.h"
	#include "HTMLImageLoader.h"
	#include "HTMLNames.h"
	#include "HTMLObjectElement.h"
	#include "HTMLParserIdioms.h"
	#include "MainResourceLoader.h"
	#include "PluginDocument.h"
	#include "RenderEmbeddedObject.h"
	#include "RenderImage.h"
	#include "RenderWidget.h"
	#include "ScriptController.h"
	#include "Settings.h"

	namespace WebCore {

	using namespace HTMLNames;

	inline HTMLEmbedElement::HTMLEmbedElement(const QualifiedName& tagName, Document* document, bool createdByParser)
	: HTMLPlugInImageElement(tagName, document, createdByParser, ShouldPreferPlugInsForImages)
	{
	ASSERT(hasTagName(embedTag));
	}

	PassRefPtr<HTMLEmbedElement> HTMLEmbedElement::create(const QualifiedName& tagName, Document* document, bool createdByParser)
	{
	return adoptRef(new HTMLEmbedElement(tagName, document, createdByParser));
	}

	static inline RenderWidget* findWidgetRenderer(const Node* n)
	{
	if (!n->renderer())
	do
	n = n->parentNode();
	while (n && !n->hasTagName(objectTag));

	if (n && n->renderer() && n->renderer()->isWidget())
	return toRenderWidget(n->renderer());

	return 0;
	}

	RenderWidget* HTMLEmbedElement::renderWidgetForJSBindings() const
	{
	document()->updateLayoutIgnorePendingStylesheets();
	return findWidgetRenderer(this);
	}

	bool HTMLEmbedElement::mapToEntry(const QualifiedName& attrName, MappedAttributeEntry& result) const
	{
	if (attrName == hiddenAttr) {
	result = eUniversal;
	return false;
	}

	return HTMLPlugInImageElement::mapToEntry(attrName, result);
	}

	void HTMLEmbedElement::parseMappedAttribute(Attribute* attr)
	{
	const AtomicString& value = attr->value();

	if (attr->name() == typeAttr) {
	m_serviceType = value.string().lower();
	size_t pos = m_serviceType.find(";");
	if (pos != notFound)
	m_serviceType = m_serviceType.left(pos);
	if (!isImageType() && m_imageLoader)
	m_imageLoader.clear();
	} else if (attr->name() == codeAttr)
	m_url = stripLeadingAndTrailingHTMLSpaces(value.string());
	else if (attr->name() == srcAttr) {
	m_url = stripLeadingAndTrailingHTMLSpaces(value.string());
	if (renderer() && isImageType()) {
	if (!m_imageLoader)
	m_imageLoader = adoptPtr(new HTMLImageLoader(this));
	m_imageLoader->updateFromElementIgnoringPreviousError();
	}
	} else if (attr->name() == hiddenAttr) {
	if (equalIgnoringCase(value.string(), "yes") \|\| equalIgnoringCase(value.string(), "true")) {
	// FIXME: Not dynamic, since we add this but don't remove it, but it may be OK for now
	// that this rarely-used attribute won't work properly if you remove it.
	addCSSLength(attr, CSSPropertyWidth, "0");
	addCSSLength(attr, CSSPropertyHeight, "0");
	}
	} else if (attr->name() == nameAttr) {
	if (inDocument() && document()->isHTMLDocument()) {
	HTMLDocument* document = static_cast<HTMLDocument*>(this->document());
	document->removeNamedItem(m_name);
	document->addNamedItem(value);
	}
	m_name = value;
	} else
	HTMLPlugInImageElement::parseMappedAttribute(attr);
	}

	void HTMLEmbedElement::parametersForPlugin(Vector<String>& paramNames, Vector<String>& paramValues)
	{
	NamedNodeMap* attributes = this->attributes(true);
	if (!attributes)
	return;

	for (unsigned i = 0; i < attributes->length(); ++i) {
	Attribute* it = attributes->attributeItem(i);
	paramNames.append(it->localName().string());
	paramValues.append(it->value().string());
	}
	}

	// FIXME: This should be unified with HTMLObjectElement::updateWidget and
	// moved down into HTMLPluginImageElement.cpp
	void HTMLEmbedElement::updateWidget(PluginCreationOption pluginCreationOption)
	{
	ASSERT(!renderEmbeddedObject()->pluginCrashedOrWasMissing());
	// FIXME: We should ASSERT(needsWidgetUpdate()), but currently
	// FrameView::updateWidget() calls updateWidget(false) without checking if
	// the widget actually needs updating!
	setNeedsWidgetUpdate(false);

	if (m_url.isEmpty() && m_serviceType.isEmpty())
	return;

	// Note these pass m_url and m_serviceType to allow better code sharing with
	// <object> which modifies url and serviceType before calling these.
	if (!allowedToLoadFrameURL(m_url))
	return;
	// FIXME: It's sadness that we have this special case here.
	// See http://trac.webkit.org/changeset/25128 and
	// plugins/netscape-plugin-setwindow-size.html
	if (pluginCreationOption == CreateOnlyNonNetscapePlugins && wouldLoadAsNetscapePlugin(m_url, m_serviceType))
	return;

	// FIXME: These should be joined into a PluginParameters class.
	Vector<String> paramNames;
	Vector<String> paramValues;
	parametersForPlugin(paramNames, paramValues);

	ASSERT(!m_inBeforeLoadEventHandler);
	m_inBeforeLoadEventHandler = true;
	bool beforeLoadAllowedLoad = dispatchBeforeLoadEvent(m_url);
	m_inBeforeLoadEventHandler = false;

	if (!beforeLoadAllowedLoad) {
	if (document()->isPluginDocument()) {
	// Plugins inside plugin documents load differently than other plugins. By the time
	// we are here in a plugin document, the load of the plugin (which is the plugin document's
	// main resource) has already started. We need to explicitly cancel the main resource load here.
	toPluginDocument(document())->cancelManualPluginLoad();
	}
	return;
	}

	SubframeLoader* loader = document()->frame()->loader()->subframeLoader();
	// FIXME: beforeLoad could have detached the renderer! Just like in the <object> case above.
	loader->requestObject(this, m_url, getAttribute(nameAttr), m_serviceType, paramNames, paramValues);
	}

	bool HTMLEmbedElement::rendererIsNeeded(RenderStyle* style)
	{
	if (isImageType())
	return HTMLPlugInImageElement::rendererIsNeeded(style);

	Frame* frame = document()->frame();
	if (!frame)
	return false;

	// If my parent is an <object> and is not set to use fallback content, I
	// should be ignored and not get a renderer.
	ContainerNode* p = parentNode();
	if (p && p->hasTagName(objectTag)) {
	ASSERT(p->renderer());
	if (!static_cast<HTMLObjectElement*>(p)->useFallbackContent()) {
	ASSERT(!p->renderer()->isEmbeddedObject());
	return false;
	}
	}

	#if ENABLE(DASHBOARD_SUPPORT)
	// Workaround for <rdar://problem/6642221>.
	if (Settings* settings = frame->settings()) {
	if (settings->usesDashboardBackwardCompatibilityMode())
	return true;
	}
	#endif

	return HTMLPlugInImageElement::rendererIsNeeded(style);
	}

	void HTMLEmbedElement::insertedIntoDocument()
	{
	HTMLPlugInImageElement::insertedIntoDocument();
	if (!inDocument())
	return;

	if (document()->isHTMLDocument())
	static_cast<HTMLDocument*>(document())->addNamedItem(m_name);

	String width = getAttribute(widthAttr);
	String height = getAttribute(heightAttr);
	if (!width.isEmpty() \|\| !height.isEmpty()) {
	Node* n = parentNode();
	while (n && !n->hasTagName(objectTag))
	n = n->parentNode();
	if (n) {
	if (!width.isEmpty())
	static_cast<HTMLObjectElement*>(n)->setAttribute(widthAttr, width);
	if (!height.isEmpty())
	static_cast<HTMLObjectElement*>(n)->setAttribute(heightAttr, height);
	}
	}
	}

	void HTMLEmbedElement::removedFromDocument()
	{
	if (document()->isHTMLDocument())
	static_cast<HTMLDocument*>(document())->removeNamedItem(m_name);

	HTMLPlugInImageElement::removedFromDocument();
	}

	void HTMLEmbedElement::attributeChanged(Attribute* attr, bool preserveDecls)
	{
	HTMLPlugInImageElement::attributeChanged(attr, preserveDecls);

	if ((attr->name() == widthAttr \|\| attr->name() == heightAttr) && !attr->isEmpty()) {
	ContainerNode* n = parentNode();
	while (n && !n->hasTagName(objectTag))
	n = n->parentNode();
	if (n)
	static_cast<HTMLObjectElement*>(n)->setAttribute(attr->name(), attr->value());
	}
	}

	bool HTMLEmbedElement::isURLAttribute(Attribute* attr) const
	{
	return attr->name() == srcAttr;
	}

	const QualifiedName& HTMLEmbedElement::imageSourceAttributeName() const
	{
	return srcAttr;
	}

	void HTMLEmbedElement::addSubresourceAttributeURLs(ListHashSet<KURL>& urls) const
	{
	HTMLPlugInImageElement::addSubresourceAttributeURLs(urls);

	addSubresourceURL(urls, document()->completeURL(getAttribute(srcAttr)));
	}

	}