third_party/WebKit/Source/core/html/HTMLEmbedElement.cpp

   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, 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 "core/html/HTMLEmbedElement.h"
  26
  27 #include "core/CSSPropertyNames.h"
  28 #include "core/HTMLNames.h"
  29 #include "core/dom/Attribute.h"
  30 #include "core/dom/ElementTraversal.h"
  31 #include "core/dom/shadow/ShadowRoot.h"
  32 #include "core/html/HTMLImageLoader.h"
  33 #include "core/html/HTMLObjectElement.h"
  34 #include "core/html/PluginDocument.h"
  35 #include "core/html/parser/HTMLParserIdioms.h"
  36 #include "core/layout/LayoutEmbeddedObject.h"
  37 #include "core/layout/LayoutPart.h"
  38
  39 namespace blink {
  40
  41 using namespace HTMLNames;
  42
  43 inline HTMLEmbedElement::HTMLEmbedElement(Document& document, bool createdByParser)
  44     : HTMLPlugInElement(embedTag, document, createdByParser, ShouldPreferPlugInsForImages)
  45 {
  46 }
  47
  48 PassRefPtrWillBeRawPtr<HTMLEmbedElement> HTMLEmbedElement::create(Document& document, bool createdByParser)
  49 {
  50     RefPtrWillBeRawPtr<HTMLEmbedElement> element = adoptRefWillBeNoop(new HTMLEmbedElement(document, createdByParser));
  51     element->ensureClosedShadowRoot();
  52     return element.release();
  53 }
  54
  55 static inline LayoutPart* findPartRenderer(const Node* n)
  56 {
  57     if (!n->renderer())
  58         n = Traversal<HTMLObjectElement>::firstAncestor(*n);
  59
  60     if (n && n->renderer() && n->renderer()->isLayoutPart())
  61         return toLayoutPart(n->renderer());
  62
  63     return nullptr;
  64 }
  65
  66 LayoutPart* HTMLEmbedElement::existingLayoutPart() const
  67 {
  68     return findPartRenderer(this);
  69 }
  70
  71 bool HTMLEmbedElement::isPresentationAttribute(const QualifiedName& name) const
  72 {
  73     if (name == hiddenAttr)
  74         return true;
  75     return HTMLPlugInElement::isPresentationAttribute(name);
  76 }
  77
  78 void HTMLEmbedElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStylePropertySet* style)
  79 {
  80     if (name == hiddenAttr) {
  81         if (equalIgnoringCase(value, "yes") || equalIgnoringCase(value, "true")) {
  82             addPropertyToPresentationAttributeStyle(style, CSSPropertyWidth, 0, CSSPrimitiveValue::CSS_PX);
  83             addPropertyToPresentationAttributeStyle(style, CSSPropertyHeight, 0, CSSPrimitiveValue::CSS_PX);
  84         }
  85     } else {
  86         HTMLPlugInElement::collectStyleForPresentationAttribute(name, value, style);
  87     }
  88 }
  89
  90 void HTMLEmbedElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
  91 {
  92     if (name == typeAttr) {
  93         m_serviceType = value.lower();
  94         size_t pos = m_serviceType.find(";");
  95         if (pos != kNotFound)
  96             m_serviceType = m_serviceType.left(pos);
  97         if (!renderer())
  98             requestPluginCreationWithoutRendererIfPossible();
  99     } else if (name == codeAttr) {
 100         m_url = stripLeadingAndTrailingHTMLSpaces(value);
 101     } else if (name == srcAttr) {
 102         m_url = stripLeadingAndTrailingHTMLSpaces(value);
 103         if (renderer() && isImageType()) {
 104             if (!m_imageLoader)
 105                 m_imageLoader = HTMLImageLoader::create(this);
 106             m_imageLoader->updateFromElement(ImageLoader::UpdateIgnorePreviousError);
 107         }
 108     } else {
 109         HTMLPlugInElement::parseAttribute(name, value);
 110     }
 111 }
 112
 113 void HTMLEmbedElement::parametersForPlugin(Vector<String>& paramNames, Vector<String>& paramValues)
 114 {
 115     AttributeCollection attributes = this->attributes();
 116     for (const Attribute& attribute : attributes) {
 117         paramNames.append(attribute.localName().string());
 118         paramValues.append(attribute.value().string());
 119     }
 120 }
 121
 122 // FIXME: This should be unified with HTMLObjectElement::updateWidget and
 123 // moved down into HTMLPluginElement.cpp
 124 void HTMLEmbedElement::updateWidgetInternal()
 125 {
 126     ASSERT(!layoutEmbeddedObject()->showsUnavailablePluginIndicator());
 127     ASSERT(needsWidgetUpdate());
 128     setNeedsWidgetUpdate(false);
 129
 130     if (m_url.isEmpty() && m_serviceType.isEmpty())
 131         return;
 132
 133     // Note these pass m_url and m_serviceType to allow better code sharing with
 134     // <object> which modifies url and serviceType before calling these.
 135     if (!allowedToLoadFrameURL(m_url))
 136         return;
 137
 138     // FIXME: These should be joined into a PluginParameters class.
 139     Vector<String> paramNames;
 140     Vector<String> paramValues;
 141     parametersForPlugin(paramNames, paramValues);
 142
 143     RefPtrWillBeRawPtr<HTMLEmbedElement> protect(this); // Loading the plugin might remove us from the document.
 144
 145     // FIXME: Can we not have renderer here now that beforeload events are gone?
 146     if (!renderer())
 147         return;
 148
 149     requestObject(m_url, m_serviceType, paramNames, paramValues);
 150 }
 151
 152 bool HTMLEmbedElement::layoutObjectIsNeeded(const LayoutStyle& style)
 153 {
 154     if (isImageType())
 155         return HTMLPlugInElement::layoutObjectIsNeeded(style);
 156
 157     // If my parent is an <object> and is not set to use fallback content, I
 158     // should be ignored and not get a renderer.
 159     ContainerNode* p = parentNode();
 160     if (isHTMLObjectElement(p)) {
 161         ASSERT(p->renderer());
 162         if (!toHTMLObjectElement(p)->useFallbackContent()) {
 163             ASSERT(!p->renderer()->isEmbeddedObject());
 164             return false;
 165         }
 166     }
 167     return HTMLPlugInElement::layoutObjectIsNeeded(style);
 168 }
 169
 170 bool HTMLEmbedElement::isURLAttribute(const Attribute& attribute) const
 171 {
 172     return attribute.name() == srcAttr || HTMLPlugInElement::isURLAttribute(attribute);
 173 }
 174
 175 const QualifiedName& HTMLEmbedElement::subResourceAttributeName() const
 176 {
 177     return srcAttr;
 178 }
 179
 180 bool HTMLEmbedElement::isInteractiveContent() const
 181 {
 182     return true;
 183 }
 184
 185 bool HTMLEmbedElement::isExposed() const
 186 {
 187     // http://www.whatwg.org/specs/web-apps/current-work/#exposed
 188     for (HTMLObjectElement* object = Traversal<HTMLObjectElement>::firstAncestor(*this); object; object = Traversal<HTMLObjectElement>::firstAncestor(*object)) {
 189         if (object->isExposed())
 190             return false;
 191     }
 192     return true;
 193 }
 194
 195 }