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      1 /*
      2  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 2000 Simon Hausmann <hausmann (at) kde.org>
      4  * Copyright (C) 2004, 2005, 2006, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
      5  *
      6  * This library is free software; you can redistribute it and/or
      7  * modify it under the terms of the GNU Library General Public
      8  * License as published by the Free Software Foundation; either
      9  * version 2 of the License, or (at your option) any later version.
     10  *
     11  * This library is distributed in the hope that it will be useful,
     12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14  * Library General Public License for more details.
     15  *
     16  * You should have received a copy of the GNU Library General Public License
     17  * along with this library; see the file COPYING.LIB.  If not, write to
     18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     19  * Boston, MA 02110-1301, USA.
     20  *
     21  */
     22 
     23 #ifndef RenderEmbeddedObject_h
     24 #define RenderEmbeddedObject_h
     25 
     26 #include "core/rendering/RenderPart.h"
     27 
     28 namespace WebCore {
     29 
     30 class MouseEvent;
     31 class TextRun;
     32 
     33 // Renderer for embeds and objects, often, but not always, rendered via plug-ins.
     34 // For example, <embed src="foo.html"> does not invoke a plug-in.
     35 class RenderEmbeddedObject : public RenderPart {
     36 public:
     37     RenderEmbeddedObject(Element*);
     38     virtual ~RenderEmbeddedObject();
     39 
     40     enum PluginUnavailabilityReason {
     41         PluginMissing,
     42         PluginBlockedByContentSecurityPolicy,
     43     };
     44     void setPluginUnavailabilityReason(PluginUnavailabilityReason);
     45     bool showsUnavailablePluginIndicator() const;
     46 
     47     // FIXME: This belongs on HTMLObjectElement.
     48     bool hasFallbackContent() const { return m_hasFallbackContent; }
     49     void setHasFallbackContent(bool hasFallbackContent) { m_hasFallbackContent = hasFallbackContent; }
     50 
     51     bool allowsAcceleratedCompositing() const;
     52 
     53 protected:
     54     virtual void paintReplaced(PaintInfo&, const LayoutPoint&) OVERRIDE FINAL;
     55     virtual void paint(PaintInfo&, const LayoutPoint&) OVERRIDE FINAL;
     56 
     57     const RenderObjectChildList* children() const { return &m_children; }
     58     RenderObjectChildList* children() { return &m_children; }
     59 
     60 protected:
     61     virtual void layout() OVERRIDE FINAL;
     62 
     63 private:
     64     virtual const char* renderName() const { return "RenderEmbeddedObject"; }
     65     virtual bool isEmbeddedObject() const OVERRIDE FINAL { return true; }
     66 
     67     void paintSnapshotImage(PaintInfo&, const LayoutPoint&, Image*);
     68     virtual void paintContents(PaintInfo&, const LayoutPoint&) OVERRIDE FINAL;
     69 
     70     virtual bool requiresLayer() const OVERRIDE FINAL;
     71 
     72     virtual void viewCleared() OVERRIDE FINAL;
     73 
     74     virtual bool scroll(ScrollDirection, ScrollGranularity, float multiplier, Node** stopNode) OVERRIDE FINAL;
     75     virtual bool logicalScroll(ScrollLogicalDirection, ScrollGranularity, float multiplier, Node** stopNode) OVERRIDE FINAL;
     76 
     77     bool getReplacementTextGeometry(const LayoutPoint& accumulatedOffset, FloatRect& contentRect, Path&, FloatRect& replacementTextRect, Font&, TextRun&, float& textWidth) const;
     78 
     79     virtual bool canHaveChildren() const OVERRIDE FINAL;
     80     virtual RenderObjectChildList* virtualChildren() OVERRIDE FINAL { return children(); }
     81     virtual const RenderObjectChildList* virtualChildren() const OVERRIDE FINAL { return children(); }
     82 
     83     bool m_hasFallbackContent; // FIXME: This belongs on HTMLObjectElement.
     84 
     85     bool m_showsUnavailablePluginIndicator;
     86     PluginUnavailabilityReason m_pluginUnavailabilityReason;
     87     String m_unavailablePluginReplacementText;
     88     RenderObjectChildList m_children;
     89 };
     90 
     91 inline RenderEmbeddedObject* toRenderEmbeddedObject(RenderObject* object)
     92 {
     93     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isEmbeddedObject());
     94     return static_cast<RenderEmbeddedObject*>(object);
     95 }
     96 
     97 // This will catch anyone doing an unnecessary cast.
     98 void toRenderEmbeddedObject(const RenderEmbeddedObject*);
     99 
    100 } // namespace WebCore
    101 
    102 #endif // RenderEmbeddedObject_h
    103