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