Home | History | Annotate | Download | only in rendering 
      1 /*
      2  * Copyright (C) 2005 Apple Computer
      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 RenderButton_h
     22 #define RenderButton_h
     23 
     24 #include "RenderFlexibleBox.h"
     25 #include "Timer.h"
     26 #include <wtf/OwnPtr.h>
     27 
     28 namespace WebCore {
     29 
     30 class RenderTextFragment;
     31 
     32 // RenderButtons are just like normal flexboxes except that they will generate an anonymous block child.
     33 // For inputs, they will also generate an anonymous RenderText and keep its style and content up
     34 // to date as the button changes.
     35 class RenderButton : public RenderFlexibleBox {
     36 public:
     37     RenderButton(Node*);
     38 
     39     virtual const char* renderName() const { return "RenderButton"; }
     40     virtual bool isRenderButton() const { return true; }
     41 
     42     virtual void addChild(RenderObject* newChild, RenderObject *beforeChild = 0);
     43     virtual void removeChild(RenderObject*);
     44     virtual void removeLeftoverAnonymousBlock(RenderBlock*) { }
     45     virtual bool createsAnonymousWrapper() const { return true; }
     46 
     47     void setupInnerStyle(RenderStyle*);
     48     virtual void updateFromElement();
     49 
     50     virtual void updateBeforeAfterContent(PseudoId);
     51 
     52     virtual bool hasControlClip() const { return true; }
     53     virtual IntRect controlClipRect(int /*tx*/, int /*ty*/) const;
     54 
     55     void setText(const String&);
     56     String text() const;
     57 
     58     virtual bool canHaveChildren() const;
     59 
     60 protected:
     61     virtual void styleWillChange(StyleDifference, const RenderStyle* newStyle);
     62     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
     63 
     64     virtual bool hasLineIfEmpty() const { return true; }
     65 
     66     void timerFired(Timer<RenderButton>*);
     67 
     68     RenderTextFragment* m_buttonText;
     69     RenderBlock* m_inner;
     70 
     71     OwnPtr<Timer<RenderButton> > m_timer;
     72     bool m_default;
     73 };
     74 
     75 inline RenderButton* toRenderButton(RenderObject* object)
     76 {
     77     ASSERT(!object || object->isRenderButton());
     78     return static_cast<RenderButton*>(object);
     79 }
     80 
     81 inline const RenderButton* toRenderButton(const RenderObject* object)
     82 {
     83     ASSERT(!object || object->isRenderButton());
     84     return static_cast<const RenderButton*>(object);
     85 }
     86 
     87 // This will catch anyone doing an unnecessary cast.
     88 void toRenderButton(const RenderButton*);
     89 
     90 } // namespace WebCore
     91 
     92 #endif // RenderButton_h
     93