1 /*
2 * Copyright (C) 2008, 2009 Apple Inc. All Rights Reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #ifndef RenderScrollbar_h
27 #define RenderScrollbar_h
28
29 #include "RenderStyleConstants.h"
30 #include "Scrollbar.h"
31 #include <wtf/HashMap.h>
32
33 namespace WebCore {
34
35 class RenderBox;
36 class RenderScrollbarPart;
37 class RenderStyle;
38
39 class RenderScrollbar : public Scrollbar {
40 protected:
41 RenderScrollbar(ScrollbarClient*, ScrollbarOrientation, RenderBox*);
42
43 public:
44 friend class Scrollbar;
45 static PassRefPtr<Scrollbar> createCustomScrollbar(ScrollbarClient*, ScrollbarOrientation, RenderBox*);
46 virtual ~RenderScrollbar();
47
48 static ScrollbarPart partForStyleResolve();
49 static RenderScrollbar* scrollbarForStyleResolve();
50
owningRenderer()51 RenderBox* owningRenderer() const { return m_owner; }
52
53 void paintPart(GraphicsContext*, ScrollbarPart, const IntRect&);
54
55 IntRect buttonRect(ScrollbarPart);
56 IntRect trackRect(int startLength, int endLength);
57 IntRect trackPieceRectWithMargins(ScrollbarPart, const IntRect&);
58
59 int minimumThumbLength();
60
61 private:
62 virtual void setParent(ScrollView*);
63 virtual void setEnabled(bool);
64
65 virtual void paint(GraphicsContext*, const IntRect& damageRect);
66
67 virtual void setHoveredPart(ScrollbarPart);
68 virtual void setPressedPart(ScrollbarPart);
69
70 virtual void styleChanged();
71
isCustomScrollbar()72 virtual bool isCustomScrollbar() const { return true; }
73
74 void updateScrollbarParts(bool destroy = false);
75
76 PassRefPtr<RenderStyle> getScrollbarPseudoStyle(ScrollbarPart, PseudoId);
77 void updateScrollbarPart(ScrollbarPart, bool destroy = false);
78
79 RenderBox* m_owner;
80 HashMap<unsigned, RenderScrollbarPart*> m_parts;
81 };
82
toRenderScrollbar(Scrollbar * scrollbar)83 inline RenderScrollbar* toRenderScrollbar(Scrollbar* scrollbar)
84 {
85 ASSERT(!scrollbar || scrollbar->isCustomScrollbar());
86 return static_cast<RenderScrollbar*>(scrollbar);
87 }
88
89 // This will catch anyone doing an unnecessary cast.
90 void toRenderScrollbar(const RenderScrollbar*);
91
92 } // namespace WebCore
93
94 #endif // RenderScrollbar_h
95