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      1 /*
      2  * Copyright (C) 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
      3  *
      4  * This library is free software; you can redistribute it and/or
      5  * modify it under the terms of the GNU Library General Public
      6  * License as published by the Free Software Foundation; either
      7  * version 2 of the License, or (at your option) any later version.
      8  *
      9  * This library is distributed in the hope that it will be useful,
     10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  * Library General Public License for more details.
     13  *
     14  * You should have received a copy of the GNU Library General Public License
     15  * along with this library; see the file COPYING.LIB.  If not, write to
     16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     17  * Boston, MA 02110-1301, USA.
     18  *
     19  */
     20 
     21 #ifndef HTMLPlugInImageElement_h
     22 #define HTMLPlugInImageElement_h
     23 
     24 #include "core/html/HTMLPlugInElement.h"
     25 
     26 #include "core/platform/MIMETypeFromURL.h"
     27 #include "core/rendering/style/RenderStyle.h"
     28 #include "wtf/OwnPtr.h"
     29 
     30 namespace WebCore {
     31 
     32 class HTMLImageLoader;
     33 class FrameLoader;
     34 class Image;
     35 class MouseEvent;
     36 class Widget;
     37 
     38 enum PluginCreationOption {
     39     CreateAnyWidgetType,
     40     CreateOnlyNonNetscapePlugins,
     41 };
     42 
     43 enum PreferPlugInsForImagesOption {
     44     ShouldPreferPlugInsForImages,
     45     ShouldNotPreferPlugInsForImages
     46 };
     47 
     48 // Base class for HTMLObjectElement and HTMLEmbedElement
     49 class HTMLPlugInImageElement : public HTMLPlugInElement {
     50 public:
     51     virtual ~HTMLPlugInImageElement();
     52 
     53     RenderEmbeddedObject* renderEmbeddedObject() const;
     54 
     55     virtual void setDisplayState(DisplayState) OVERRIDE;
     56 
     57     virtual void updateWidget(PluginCreationOption) = 0;
     58 
     59     const String& serviceType() const { return m_serviceType; }
     60     const String& url() const { return m_url; }
     61     const KURL& loadedUrl() const { return m_loadedUrl; }
     62 
     63     const String loadedMimeType() const
     64     {
     65         String mimeType = serviceType();
     66         if (mimeType.isEmpty())
     67             mimeType = mimeTypeFromURL(m_loadedUrl);
     68         return mimeType;
     69     }
     70 
     71     bool shouldPreferPlugInsForImages() const { return m_shouldPreferPlugInsForImages; }
     72 
     73     // Public for FrameView::addWidgetToUpdate()
     74     bool needsWidgetUpdate() const { return m_needsWidgetUpdate; }
     75     void setNeedsWidgetUpdate(bool needsWidgetUpdate) { m_needsWidgetUpdate = needsWidgetUpdate; }
     76 
     77 protected:
     78     HTMLPlugInImageElement(const QualifiedName& tagName, Document*, bool createdByParser, PreferPlugInsForImagesOption);
     79 
     80     bool isImageType();
     81 
     82     OwnPtr<HTMLImageLoader> m_imageLoader;
     83     String m_serviceType;
     84     String m_url;
     85     KURL m_loadedUrl;
     86 
     87     static void updateWidgetCallback(Node*);
     88     virtual void attach(const AttachContext& = AttachContext()) OVERRIDE;
     89     virtual void detach(const AttachContext& = AttachContext()) OVERRIDE;
     90 
     91     bool allowedToLoadFrameURL(const String& url);
     92     bool wouldLoadAsNetscapePlugin(const String& url, const String& serviceType);
     93 
     94     virtual void didMoveToNewDocument(Document* oldDocument) OVERRIDE;
     95 
     96     bool requestObject(const String& url, const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues);
     97     bool shouldUsePlugin(const KURL&, const String& mimeType, bool hasFallback, bool& useFallback);
     98 
     99 private:
    100     virtual RenderObject* createRenderer(RenderStyle*);
    101     virtual void willRecalcStyle(StyleChange) OVERRIDE FINAL;
    102 
    103     virtual void finishParsingChildren();
    104 
    105     void updateWidgetIfNecessary();
    106 
    107     void swapRendererTimerFired(Timer<HTMLPlugInImageElement>*);
    108 
    109     void restartSimilarPlugIns();
    110 
    111     bool loadPlugin(const KURL&, const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues, bool useFallback);
    112     bool pluginIsLoadable(const KURL&, const String& mimeType);
    113 
    114     virtual bool isPlugInImageElement() const OVERRIDE { return true; }
    115 
    116     bool m_needsWidgetUpdate;
    117     bool m_shouldPreferPlugInsForImages;
    118     bool m_createdDuringUserGesture;
    119 };
    120 
    121 inline HTMLPlugInImageElement* toHTMLPlugInImageElement(Node* node)
    122 {
    123     ASSERT_WITH_SECURITY_IMPLICATION(!node || node->isPluginElement());
    124     HTMLPlugInElement* plugInElement = static_cast<HTMLPlugInElement*>(node);
    125     ASSERT_WITH_SECURITY_IMPLICATION(plugInElement->isPlugInImageElement());
    126     return static_cast<HTMLPlugInImageElement*>(plugInElement);
    127 }
    128 
    129 inline const HTMLPlugInImageElement* toHTMLPlugInImageElement(const Node* node)
    130 {
    131     ASSERT_WITH_SECURITY_IMPLICATION(!node || node->isPluginElement());
    132     const HTMLPlugInElement* plugInElement = static_cast<const HTMLPlugInElement*>(node);
    133     ASSERT_WITH_SECURITY_IMPLICATION(plugInElement->isPlugInImageElement());
    134     return static_cast<const HTMLPlugInImageElement*>(plugInElement);
    135 }
    136 
    137 // This will catch anyone doing an unnecessary cast.
    138 void toHTMLPlugInImageElement(const HTMLPlugInImageElement*);
    139 
    140 } // namespace WebCore
    141 
    142 #endif // HTMLPlugInImageElement_h
    143