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->ensureUserAgentShadowRoot();
  52     return element.release();
  53 }
  54
  55 static inline LayoutPart* findPartLayoutObject(const Node* n)
  56 {
  57     if (!n->layoutObject())
  58         n = Traversal<HTMLObjectElement>::firstAncestor(*n);
  59
  60     if (n && n->layoutObject() && n->layoutObject()->isLayoutPart())
  61         return toLayoutPart(n->layoutObject());
  62
  63     return nullptr;
  64 }
  65
  66 LayoutPart* HTMLEmbedElement::existingLayoutPart() const
  67 {
  68     return findPartLayoutObject(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::UnitType::Pixels);
  83             addPropertyToPresentationAttributeStyle(style, CSSPropertyHeight, 0, CSSPrimitiveValue::UnitType::Pixels);
  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 (layoutObject()) {
  98             setNeedsWidgetUpdate(true);
  99             layoutObject()->setNeedsLayoutAndFullPaintInvalidation("Embed type changed");
 100         } else {
 101             requestPluginCreationWithoutLayoutObjectIfPossible();
 102         }
 103     } else if (name == codeAttr) { // TODO(schenney): Remove this? It's not in the spec and we're not in the HTMLAppletElement hierarchy
 104         m_url = stripLeadingAndTrailingHTMLSpaces(value);
 105     } else if (name == srcAttr) {
 106         m_url = stripLeadingAndTrailingHTMLSpaces(value);
 107         if (layoutObject() && isImageType()) {
 108             if (!m_imageLoader)
 109                 m_imageLoader = HTMLImageLoader::create(this);
 110             m_imageLoader->updateFromElement(ImageLoader::UpdateIgnorePreviousError);
 111         }
 112     } else {
 113         HTMLPlugInElement::parseAttribute(name, value);
 114     }
 115 }
 116
 117 void HTMLEmbedElement::parametersForPlugin(Vector<String>& paramNames, Vector<String>& paramValues)
 118 {
 119     AttributeCollection attributes = this->attributes();
 120     for (const Attribute& attribute : attributes) {
 121         paramNames.append(attribute.localName().string());
 122         paramValues.append(attribute.value().string());
 123     }
 124 }
 125
 126 // FIXME: This should be unified with HTMLObjectElement::updateWidget and
 127 // moved down into HTMLPluginElement.cpp
 128 void HTMLEmbedElement::updateWidgetInternal()
 129 {
 130     ASSERT(!layoutEmbeddedObject()->showsUnavailablePluginIndicator());
 131     ASSERT(needsWidgetUpdate());
 132     setNeedsWidgetUpdate(false);
 133
 134     if (m_url.isEmpty() && m_serviceType.isEmpty())
 135         return;
 136
 137     // Note these pass m_url and m_serviceType to allow better code sharing with
 138     // <object> which modifies url and serviceType before calling these.
 139     if (!allowedToLoadFrameURL(m_url))
 140         return;
 141
 142     // FIXME: These should be joined into a PluginParameters class.
 143     Vector<String> paramNames;
 144     Vector<String> paramValues;
 145     parametersForPlugin(paramNames, paramValues);
 146
 147     RefPtrWillBeRawPtr<HTMLEmbedElement> protect(this); // Loading the plugin might remove us from the document.
 148
 149     // FIXME: Can we not have layoutObject here now that beforeload events are gone?
 150     if (!layoutObject())
 151         return;
 152
 153     requestObject(m_url, m_serviceType, paramNames, paramValues);
 154 }
 155
 156 bool HTMLEmbedElement::layoutObjectIsNeeded(const ComputedStyle& style)
 157 {
 158     if (isImageType())
 159         return HTMLPlugInElement::layoutObjectIsNeeded(style);
 160
 161     // If my parent is an <object> and is not set to use fallback content, I
 162     // should be ignored and not get a layoutObject.
 163     ContainerNode* p = parentNode();
 164     if (isHTMLObjectElement(p)) {
 165         ASSERT(p->layoutObject());
 166         if (!toHTMLObjectElement(p)->useFallbackContent()) {
 167             ASSERT(!p->layoutObject()->isEmbeddedObject());
 168             return false;
 169         }
 170     }
 171     return HTMLPlugInElement::layoutObjectIsNeeded(style);
 172 }
 173
 174 bool HTMLEmbedElement::isURLAttribute(const Attribute& attribute) const
 175 {
 176     return attribute.name() == srcAttr || HTMLPlugInElement::isURLAttribute(attribute);
 177 }
 178
 179 const QualifiedName& HTMLEmbedElement::subResourceAttributeName() const
 180 {
 181     return srcAttr;
 182 }
 183
 184 bool HTMLEmbedElement::isInteractiveContent() const
 185 {
 186     return true;
 187 }
 188
 189 bool HTMLEmbedElement::isExposed() const
 190 {
 191     // http://www.whatwg.org/specs/web-apps/current-work/#exposed
 192     for (HTMLObjectElement* object = Traversal<HTMLObjectElement>::firstAncestor(*this); object; object = Traversal<HTMLObjectElement>::firstAncestor(*object)) {
 193         if (object->isExposed())
 194             return false;
 195     }
 196     return true;
 197 }
 198
 199 }