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      1 /*
      2  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 1999 Antti Koivisto (koivisto (at) kde.org)
      4  *           (C) 2000 Stefan Schimanski (1Stein (at) gmx.de)
      5  * Copyright (C) 2004, 2005, 2006, 2008, 2009, 2011 Apple Inc. All rights reserved.
      6  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
      7  *
      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.
     12  *
     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.
     17  *
     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.
     22  */
     23 
     24 #include "config.h"
     25 #include "HTMLEmbedElement.h"
     26 
     27 #include "Attribute.h"
     28 #include "CSSPropertyNames.h"
     29 #include "DocumentLoader.h"
     30 #include "Frame.h"
     31 #include "HTMLDocument.h"
     32 #include "HTMLImageLoader.h"
     33 #include "HTMLNames.h"
     34 #include "HTMLObjectElement.h"
     35 #include "HTMLParserIdioms.h"
     36 #include "MainResourceLoader.h"
     37 #include "PluginDocument.h"
     38 #include "RenderEmbeddedObject.h"
     39 #include "RenderImage.h"
     40 #include "RenderWidget.h"
     41 #include "ScriptController.h"
     42 #include "Settings.h"
     43 
     44 namespace WebCore {
     45 
     46 using namespace HTMLNames;
     47 
     48 inline HTMLEmbedElement::HTMLEmbedElement(const QualifiedName& tagName, Document* document, bool createdByParser)
     49     : HTMLPlugInImageElement(tagName, document, createdByParser, ShouldPreferPlugInsForImages)
     50 {
     51     ASSERT(hasTagName(embedTag));
     52 }
     53 
     54 PassRefPtr<HTMLEmbedElement> HTMLEmbedElement::create(const QualifiedName& tagName, Document* document, bool createdByParser)
     55 {
     56     return adoptRef(new HTMLEmbedElement(tagName, document, createdByParser));
     57 }
     58 
     59 static inline RenderWidget* findWidgetRenderer(const Node* n)
     60 {
     61     if (!n->renderer())
     62         do
     63             n = n->parentNode();
     64         while (n && !n->hasTagName(objectTag));
     65 
     66     if (n && n->renderer() && n->renderer()->isWidget())
     67         return toRenderWidget(n->renderer());
     68 
     69     return 0;
     70 }
     71 
     72 RenderWidget* HTMLEmbedElement::renderWidgetForJSBindings() const
     73 {
     74     document()->updateLayoutIgnorePendingStylesheets();
     75     return findWidgetRenderer(this);
     76 }
     77 
     78 bool HTMLEmbedElement::mapToEntry(const QualifiedName& attrName, MappedAttributeEntry& result) const
     79 {
     80     if (attrName == hiddenAttr) {
     81         result = eUniversal;
     82         return false;
     83     }
     84 
     85     return HTMLPlugInImageElement::mapToEntry(attrName, result);
     86 }
     87 
     88 void HTMLEmbedElement::parseMappedAttribute(Attribute* attr)
     89 {
     90     const AtomicString& value = attr->value();
     91 
     92     if (attr->name() == typeAttr) {
     93         m_serviceType = value.string().lower();
     94         size_t pos = m_serviceType.find(";");
     95         if (pos != notFound)
     96             m_serviceType = m_serviceType.left(pos);
     97         if (!isImageType() && m_imageLoader)
     98             m_imageLoader.clear();
     99     } else if (attr->name() == codeAttr)
    100         m_url = stripLeadingAndTrailingHTMLSpaces(value.string());
    101     else if (attr->name() == srcAttr) {
    102         m_url = stripLeadingAndTrailingHTMLSpaces(value.string());
    103         if (renderer() && isImageType()) {
    104             if (!m_imageLoader)
    105                 m_imageLoader = adoptPtr(new HTMLImageLoader(this));
    106             m_imageLoader->updateFromElementIgnoringPreviousError();
    107         }
    108     } else if (attr->name() == hiddenAttr) {
    109         if (equalIgnoringCase(value.string(), "yes") || equalIgnoringCase(value.string(), "true")) {
    110             // FIXME: Not dynamic, since we add this but don't remove it, but it may be OK for now
    111             // that this rarely-used attribute won't work properly if you remove it.
    112             addCSSLength(attr, CSSPropertyWidth, "0");
    113             addCSSLength(attr, CSSPropertyHeight, "0");
    114         }
    115     } else if (attr->name() == nameAttr) {
    116         if (inDocument() && document()->isHTMLDocument()) {
    117             HTMLDocument* document = static_cast<HTMLDocument*>(this->document());
    118             document->removeNamedItem(m_name);
    119             document->addNamedItem(value);
    120         }
    121         m_name = value;
    122     } else
    123         HTMLPlugInImageElement::parseMappedAttribute(attr);
    124 }
    125 
    126 void HTMLEmbedElement::parametersForPlugin(Vector<String>& paramNames, Vector<String>& paramValues)
    127 {
    128     NamedNodeMap* attributes = this->attributes(true);
    129     if (!attributes)
    130         return;
    131 
    132     for (unsigned i = 0; i < attributes->length(); ++i) {
    133         Attribute* it = attributes->attributeItem(i);
    134         paramNames.append(it->localName().string());
    135         paramValues.append(it->value().string());
    136     }
    137 }
    138 
    139 // FIXME: This should be unified with HTMLObjectElement::updateWidget and
    140 // moved down into HTMLPluginImageElement.cpp
    141 void HTMLEmbedElement::updateWidget(PluginCreationOption pluginCreationOption)
    142 {
    143     ASSERT(!renderEmbeddedObject()->pluginCrashedOrWasMissing());
    144     // FIXME: We should ASSERT(needsWidgetUpdate()), but currently
    145     // FrameView::updateWidget() calls updateWidget(false) without checking if
    146     // the widget actually needs updating!
    147     setNeedsWidgetUpdate(false);
    148 
    149     if (m_url.isEmpty() && m_serviceType.isEmpty())
    150         return;
    151 
    152     // Note these pass m_url and m_serviceType to allow better code sharing with
    153     // <object> which modifies url and serviceType before calling these.
    154     if (!allowedToLoadFrameURL(m_url))
    155         return;
    156     // FIXME: It's sadness that we have this special case here.
    157     //        See http://trac.webkit.org/changeset/25128 and
    158     //        plugins/netscape-plugin-setwindow-size.html
    159     if (pluginCreationOption == CreateOnlyNonNetscapePlugins && wouldLoadAsNetscapePlugin(m_url, m_serviceType))
    160         return;
    161 
    162     // FIXME: These should be joined into a PluginParameters class.
    163     Vector<String> paramNames;
    164     Vector<String> paramValues;
    165     parametersForPlugin(paramNames, paramValues);
    166 
    167     ASSERT(!m_inBeforeLoadEventHandler);
    168     m_inBeforeLoadEventHandler = true;
    169     bool beforeLoadAllowedLoad = dispatchBeforeLoadEvent(m_url);
    170     m_inBeforeLoadEventHandler = false;
    171 
    172     if (!beforeLoadAllowedLoad) {
    173         if (document()->isPluginDocument()) {
    174             // Plugins inside plugin documents load differently than other plugins. By the time
    175             // we are here in a plugin document, the load of the plugin (which is the plugin document's
    176             // main resource) has already started. We need to explicitly cancel the main resource load here.
    177             toPluginDocument(document())->cancelManualPluginLoad();
    178         }
    179         return;
    180     }
    181 
    182     SubframeLoader* loader = document()->frame()->loader()->subframeLoader();
    183     // FIXME: beforeLoad could have detached the renderer!  Just like in the <object> case above.
    184     loader->requestObject(this, m_url, getAttribute(nameAttr), m_serviceType, paramNames, paramValues);
    185 }
    186 
    187 bool HTMLEmbedElement::rendererIsNeeded(RenderStyle* style)
    188 {
    189     if (isImageType())
    190         return HTMLPlugInImageElement::rendererIsNeeded(style);
    191 
    192     Frame* frame = document()->frame();
    193     if (!frame)
    194         return false;
    195 
    196     // If my parent is an <object> and is not set to use fallback content, I
    197     // should be ignored and not get a renderer.
    198     ContainerNode* p = parentNode();
    199     if (p && p->hasTagName(objectTag)) {
    200         ASSERT(p->renderer());
    201         if (!static_cast<HTMLObjectElement*>(p)->useFallbackContent()) {
    202             ASSERT(!p->renderer()->isEmbeddedObject());
    203             return false;
    204         }
    205     }
    206 
    207 #if ENABLE(DASHBOARD_SUPPORT)
    208     // Workaround for <rdar://problem/6642221>.
    209     if (Settings* settings = frame->settings()) {
    210         if (settings->usesDashboardBackwardCompatibilityMode())
    211             return true;
    212     }
    213 #endif
    214 
    215     return HTMLPlugInImageElement::rendererIsNeeded(style);
    216 }
    217 
    218 void HTMLEmbedElement::insertedIntoDocument()
    219 {
    220     HTMLPlugInImageElement::insertedIntoDocument();
    221     if (!inDocument())
    222         return;
    223 
    224     if (document()->isHTMLDocument())
    225         static_cast<HTMLDocument*>(document())->addNamedItem(m_name);
    226 
    227     String width = getAttribute(widthAttr);
    228     String height = getAttribute(heightAttr);
    229     if (!width.isEmpty() || !height.isEmpty()) {
    230         Node* n = parentNode();
    231         while (n && !n->hasTagName(objectTag))
    232             n = n->parentNode();
    233         if (n) {
    234             if (!width.isEmpty())
    235                 static_cast<HTMLObjectElement*>(n)->setAttribute(widthAttr, width);
    236             if (!height.isEmpty())
    237                 static_cast<HTMLObjectElement*>(n)->setAttribute(heightAttr, height);
    238         }
    239     }
    240 }
    241 
    242 void HTMLEmbedElement::removedFromDocument()
    243 {
    244     if (document()->isHTMLDocument())
    245         static_cast<HTMLDocument*>(document())->removeNamedItem(m_name);
    246 
    247     HTMLPlugInImageElement::removedFromDocument();
    248 }
    249 
    250 void HTMLEmbedElement::attributeChanged(Attribute* attr, bool preserveDecls)
    251 {
    252     HTMLPlugInImageElement::attributeChanged(attr, preserveDecls);
    253 
    254     if ((attr->name() == widthAttr || attr->name() == heightAttr) && !attr->isEmpty()) {
    255         ContainerNode* n = parentNode();
    256         while (n && !n->hasTagName(objectTag))
    257             n = n->parentNode();
    258         if (n)
    259             static_cast<HTMLObjectElement*>(n)->setAttribute(attr->name(), attr->value());
    260     }
    261 }
    262 
    263 bool HTMLEmbedElement::isURLAttribute(Attribute* attr) const
    264 {
    265     return attr->name() == srcAttr;
    266 }
    267 
    268 const QualifiedName& HTMLEmbedElement::imageSourceAttributeName() const
    269 {
    270     return srcAttr;
    271 }
    272 
    273 void HTMLEmbedElement::addSubresourceAttributeURLs(ListHashSet<KURL>& urls) const
    274 {
    275     HTMLPlugInImageElement::addSubresourceAttributeURLs(urls);
    276 
    277     addSubresourceURL(urls, document()->completeURL(getAttribute(srcAttr)));
    278 }
    279 
    280 }
    281