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
28namespace WebCore {
29
30class 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.
35class RenderButton : public RenderFlexibleBox {
36public:
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
61private:
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
78inline RenderButton* toRenderButton(RenderObject* object)
79{
80    ASSERT(!object || object->isRenderButton());
81    return static_cast<RenderButton*>(object);
82}
83
84inline 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.
91void toRenderButton(const RenderButton*);
92
93} // namespace WebCore
94
95#endif // RenderButton_h
96