1 /*

     2  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)

     3  *           (C) 1999 Antti Koivisto (koivisto@kde.org)

     4  *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)

     5  * Copyright (C) 2004, 2005, 2006, 2008, 2009 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 "CSSHelper.h"

    29 #include "CSSPropertyNames.h"

    30 #include "Frame.h"

    31 #include "HTMLDocument.h"

    32 #include "HTMLImageLoader.h"

    33 #include "HTMLNames.h"

    34 #include "HTMLObjectElement.h"

    35 #include "RenderEmbeddedObject.h"

    36 #include "RenderImage.h"

    37 #include "RenderWidget.h"

    38 #include "ScriptController.h"

    39 #include "Settings.h"

    40 

    41 namespace WebCore {

    42 

    43 using namespace HTMLNames;

    44 

    45 inline HTMLEmbedElement::HTMLEmbedElement(const QualifiedName& tagName, Document* document)

    46     : HTMLPlugInImageElement(tagName, document)

    47     , m_needWidgetUpdate(false)

    48 {

    49     ASSERT(hasTagName(embedTag));

    50 }

    51 

    52 PassRefPtr<HTMLEmbedElement> HTMLEmbedElement::create(const QualifiedName& tagName, Document* document)

    53 {

    54     return adoptRef(new HTMLEmbedElement(tagName, document));

    55 }

    56 

    57 static inline RenderWidget* findWidgetRenderer(const Node* n) 

    58 {

    59     if (!n->renderer())

    60         do

    61             n = n->parentNode();

    62         while (n && !n->hasTagName(objectTag));

    63 

    64     if (n && n->renderer() && n->renderer()->isWidget())

    65         return toRenderWidget(n->renderer());

    66 

    67     return 0;

    68 }

    69 

    70 RenderWidget* HTMLEmbedElement::renderWidgetForJSBindings() const

    71 {

    72     document()->updateLayoutIgnorePendingStylesheets();

    73     return findWidgetRenderer(this);

    74 }

    75 

    76 bool HTMLEmbedElement::mapToEntry(const QualifiedName& attrName, MappedAttributeEntry& result) const

    77 {

    78     if (attrName == hiddenAttr) {

    79         result = eUniversal;

    80         return false;

    81     }

    82         

    83     return HTMLPlugInElement::mapToEntry(attrName, result);

    84 }

    85 

    86 void HTMLEmbedElement::parseMappedAttribute(Attribute* attr)

    87 {

    88     const AtomicString& value = attr->value();

    89   

    90     if (attr->name() == typeAttr) {

    91         m_serviceType = value.string().lower();

    92         int pos = m_serviceType.find(";");

    93         if (pos != -1)

    94             m_serviceType = m_serviceType.left(pos);

    95         if (!isImageType() && m_imageLoader)

    96             m_imageLoader.clear();

    97     } else if (attr->name() == codeAttr)

    98         m_url = deprecatedParseURL(value.string());

    99     else if (attr->name() == srcAttr) {

   100         m_url = deprecatedParseURL(value.string());

   101         if (renderer() && isImageType()) {

   102             if (!m_imageLoader)

   103                 m_imageLoader.set(new HTMLImageLoader(this));

   104             m_imageLoader->updateFromElementIgnoringPreviousError();

   105         }

   106     } else if (attr->name() == hiddenAttr) {

   107         if (equalIgnoringCase(value.string(), "yes") || equalIgnoringCase(value.string(), "true")) {

   108             // FIXME: Not dynamic, since we add this but don't remove it, but it may be OK for now

   109             // that this rarely-used attribute won't work properly if you remove it.

   110             addCSSLength(attr, CSSPropertyWidth, "0");

   111             addCSSLength(attr, CSSPropertyHeight, "0");

   112         }

   113     } else if (attr->name() == nameAttr) {

   114         if (inDocument() && document()->isHTMLDocument()) {

   115             HTMLDocument* document = static_cast<HTMLDocument*>(this->document());

   116             document->removeNamedItem(m_name);

   117             document->addNamedItem(value);

   118         }

   119         m_name = value;

   120     } else

   121         HTMLPlugInElement::parseMappedAttribute(attr);

   122 }

   123 

   124 bool HTMLEmbedElement::rendererIsNeeded(RenderStyle* style)

   125 {

   126     if (isImageType())

   127         return HTMLPlugInElement::rendererIsNeeded(style);

   128 

   129     Frame* frame = document()->frame();

   130     if (!frame)

   131         return false;

   132 

   133     Node* p = parentNode();

   134     if (p && p->hasTagName(objectTag)) {

   135         ASSERT(p->renderer());

   136         return false;

   137     }

   138 

   139 #if ENABLE(DASHBOARD_SUPPORT)

   140     // Workaround for <rdar://problem/6642221>. 

   141     if (Settings* settings = frame->settings()) {

   142         if (settings->usesDashboardBackwardCompatibilityMode())

   143             return true;

   144     }

   145 #endif

   146 

   147     return HTMLPlugInElement::rendererIsNeeded(style);

   148 }

   149 

   150 RenderObject* HTMLEmbedElement::createRenderer(RenderArena* arena, RenderStyle*)

   151 {

   152     if (isImageType())

   153         return new (arena) RenderImage(this);

   154     return new (arena) RenderEmbeddedObject(this);

   155 }

   156 

   157 void HTMLEmbedElement::attach()

   158 {

   159     m_needWidgetUpdate = true;

   160 

   161     bool isImage = isImageType();

   162 

   163     if (!isImage)

   164         queuePostAttachCallback(&HTMLPlugInElement::updateWidgetCallback, this);

   165 

   166     HTMLPlugInElement::attach();

   167 

   168     if (isImage && renderer()) {

   169         if (!m_imageLoader)

   170             m_imageLoader.set(new HTMLImageLoader(this));

   171         m_imageLoader->updateFromElement();

   172 

   173         if (renderer())

   174             toRenderImage(renderer())->setCachedImage(m_imageLoader->image());

   175     }

   176 }

   177 

   178 void HTMLEmbedElement::updateWidget()

   179 {

   180     document()->updateStyleIfNeeded();

   181     if (m_needWidgetUpdate && renderer() && !isImageType())

   182         toRenderEmbeddedObject(renderer())->updateWidget(true);

   183 }

   184 

   185 void HTMLEmbedElement::insertedIntoDocument()

   186 {

   187     if (document()->isHTMLDocument())

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

   189 

   190     String width = getAttribute(widthAttr);

   191     String height = getAttribute(heightAttr);

   192     if (!width.isEmpty() || !height.isEmpty()) {

   193         Node* n = parent();

   194         while (n && !n->hasTagName(objectTag))

   195             n = n->parent();

   196         if (n) {

   197             if (!width.isEmpty())

   198                 static_cast<HTMLObjectElement*>(n)->setAttribute(widthAttr, width);

   199             if (!height.isEmpty())

   200                 static_cast<HTMLObjectElement*>(n)->setAttribute(heightAttr, height);

   201         }

   202     }

   203 

   204     HTMLPlugInElement::insertedIntoDocument();

   205 }

   206 

   207 void HTMLEmbedElement::removedFromDocument()

   208 {

   209     if (document()->isHTMLDocument())

   210         static_cast<HTMLDocument*>(document())->removeNamedItem(m_name);

   211 

   212     HTMLPlugInElement::removedFromDocument();

   213 }

   214 

   215 void HTMLEmbedElement::attributeChanged(Attribute* attr, bool preserveDecls)

   216 {

   217     HTMLPlugInElement::attributeChanged(attr, preserveDecls);

   218 

   219     if ((attr->name() == widthAttr || attr->name() == heightAttr) && !attr->isEmpty()) {

   220         Node* n = parent();

   221         while (n && !n->hasTagName(objectTag))

   222             n = n->parent();

   223         if (n)

   224             static_cast<HTMLObjectElement*>(n)->setAttribute(attr->name(), attr->value());

   225     }

   226 }

   227 

   228 bool HTMLEmbedElement::isURLAttribute(Attribute* attr) const

   229 {

   230     return attr->name() == srcAttr;

   231 }

   232 

   233 const QualifiedName& HTMLEmbedElement::imageSourceAttributeName() const

   234 {

   235     return srcAttr;

   236 }

   237 

   238 void HTMLEmbedElement::addSubresourceAttributeURLs(ListHashSet<KURL>& urls) const

   239 {

   240     HTMLPlugInImageElement::addSubresourceAttributeURLs(urls);

   241 

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

   243 }

   244 

   245 }