Home | History | Annotate | Download | only in rendering 
      1 /*
      2  * Copyright (C) 2004 Allan Sandfeld Jensen (kde (at) carewolf.com)
      3  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
      4  *
      5  * This library is free software; you can redistribute it and/or
      6  * modify it under the terms of the GNU Library General Public
      7  * License as published by the Free Software Foundation; either
      8  * version 2 of the License, or (at your option) any later version.
      9  *
     10  * This library is distributed in the hope that it will be useful,
     11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13  * Library General Public License for more details.
     14  *
     15  * You should have received a copy of the GNU Library General Public License
     16  * along with this library; see the file COPYING.LIB.  If not, write to
     17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     18  * Boston, MA 02110-1301, USA.
     19  *
     20  */
     21 
     22 #ifndef RenderCounter_h
     23 #define RenderCounter_h
     24 
     25 #include "core/rendering/RenderText.h"
     26 #include "core/rendering/style/CounterContent.h"
     27 
     28 namespace WebCore {
     29 
     30 class CounterNode;
     31 
     32 class RenderCounter FINAL : public RenderText {
     33 public:
     34     RenderCounter(Document*, const CounterContent&);
     35     virtual ~RenderCounter();
     36 
     37     static void destroyCounterNodes(RenderObject*);
     38     static void destroyCounterNode(RenderObject*, const AtomicString& identifier);
     39     static void rendererSubtreeAttached(RenderObject*);
     40     static void rendererRemovedFromTree(RenderObject*);
     41     static void rendererStyleChanged(RenderObject*, const RenderStyle* oldStyle, const RenderStyle* newStyle);
     42 
     43     void updateCounter();
     44 
     45 protected:
     46     virtual void willBeDestroyed();
     47 
     48 private:
     49     virtual const char* renderName() const;
     50     virtual bool isCounter() const;
     51     virtual PassRefPtr<StringImpl> originalText() const;
     52 
     53     virtual void computePreferredLogicalWidths(float leadWidth) OVERRIDE;
     54 
     55     // Removes the reference to the CounterNode associated with this renderer.
     56     // This is used to cause a counter display update when the CounterNode tree changes.
     57     void invalidate();
     58 
     59     CounterContent m_counter;
     60     CounterNode* m_counterNode;
     61     RenderCounter* m_nextForSameCounter;
     62     friend class CounterNode;
     63 };
     64 
     65 inline RenderCounter* toRenderCounter(RenderObject* object)
     66 {
     67     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isCounter());
     68     return static_cast<RenderCounter*>(object);
     69 }
     70 
     71 // This will catch anyone doing an unnecessary cast.
     72 void toRenderCounter(const RenderCounter*);
     73 
     74 } // namespace WebCore
     75 
     76 #ifndef NDEBUG
     77 // Outside the WebCore namespace for ease of invocation from gdb.
     78 void showCounterRendererTree(const WebCore::RenderObject*, const char* counterName = 0);
     79 #endif
     80 
     81 #endif // RenderCounter_h
     82