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     explicit RenderButton(Node*);
     38     virtual ~RenderButton();
     39 
     40     virtual const char* renderName() const { return "RenderButton"; }
     41     virtual bool isRenderButton() const { return true; }
     42 
     43     virtual void addChild(RenderObject* newChild, RenderObject *beforeChild = 0);
     44     virtual void removeChild(RenderObject*);
     45     virtual void removeLeftoverAnonymousBlock(RenderBlock*) { }
     46     virtual bool createsAnonymousWrapper() const { return true; }
     47 
     48     void setupInnerStyle(RenderStyle*);
     49     virtual void updateFromElement();
     50 
     51     virtual void updateBeforeAfterContent(PseudoId);
     52 
     53     virtual bool hasControlClip() const { return true; }
     54     virtual IntRect controlClipRect(int /*tx*/, int /*ty*/) const;
     55 
     56     void setText(const String&);
     57     String text() const;
     58 
     59     virtual bool canHaveChildren() const;
     60 
     61 private:
     62     virtual void styleWillChange(StyleDifference, const RenderStyle* newStyle);
     63     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
     64 
     65     virtual bool hasLineIfEmpty() const { return true; }
     66 
     67     virtual bool requiresForcedStyleRecalcPropagation() const { return true; }
     68 
     69     void timerFired(Timer<RenderButton>*);
     70 
     71     RenderTextFragment* m_buttonText;
     72     RenderBlock* m_inner;
     73 
     74     OwnPtr<Timer<RenderButton> > m_timer;
     75     bool m_default;
     76 };
     77 
     78 inline RenderButton* toRenderButton(RenderObject* object)
     79 {
     80     ASSERT(!object || object->isRenderButton());
     81     return static_cast<RenderButton*>(object);
     82 }
     83 
     84 inline const RenderButton* toRenderButton(const RenderObject* object)
     85 {
     86     ASSERT(!object || object->isRenderButton());
     87     return static_cast<const RenderButton*>(object);
     88 }
     89 
     90 // This will catch anyone doing an unnecessary cast.
     91 void toRenderButton(const RenderButton*);
     92 
     93 } // namespace WebCore
     94 
     95 #endif // RenderButton_h
     96