2 * Copyright (C) 2008, 2009 Apple Inc. All Rights Reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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.
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.
26 #ifndef RenderScrollbar_h
27 #define RenderScrollbar_h
29 #include "core/rendering/style/RenderStyleConstants.h"
30 #include "platform/heap/Handle.h"
31 #include "platform/scroll/Scrollbar.h"
32 #include "wtf/HashMap.h"
39 class RenderScrollbarPart;
42 class RenderScrollbar final : public Scrollbar {
44 USING_PRE_FINALIZER(RenderScrollbar, destroyParts);
47 static PassRefPtrWillBeRawPtr<Scrollbar> createCustomScrollbar(ScrollableArea*, ScrollbarOrientation, Node*, LocalFrame* owningFrame = 0);
48 virtual ~RenderScrollbar();
50 RenderBox* owningRenderer() const;
52 IntRect buttonRect(ScrollbarPart);
53 IntRect trackRect(int startLength, int endLength);
54 IntRect trackPieceRectWithMargins(ScrollbarPart, const IntRect&);
56 int minimumThumbLength();
58 virtual bool isOverlayScrollbar() const override { return false; }
60 RenderScrollbarPart* getPart(ScrollbarPart partType) { return m_parts.get(partType); }
62 virtual void trace(Visitor*) override;
65 RenderScrollbar(ScrollableArea*, ScrollbarOrientation, Node*, LocalFrame*);
68 friend class Scrollbar;
70 virtual void setParent(Widget*) override;
71 virtual void setEnabled(bool) override;
73 virtual void setHoveredPart(ScrollbarPart) override;
74 virtual void setPressedPart(ScrollbarPart) override;
76 virtual void styleChanged() override;
78 virtual bool isCustomScrollbar() const override { return true; }
80 void updateScrollbarParts(bool destroy = false);
82 PassRefPtr<RenderStyle> getScrollbarPseudoStyle(ScrollbarPart, PseudoId);
83 void updateScrollbarPart(ScrollbarPart, bool destroy = false);
87 // This Scrollbar(Widget) may outlive the DOM which created it (during tear down),
88 // so we keep a reference to the Node which caused this custom scrollbar creation.
89 // This will not create a reference cycle as the Widget tree is owned by our containing
90 // FrameView which this Node pointer can in no way keep alive. See webkit bug 80610.
91 RefPtrWillBeMember<Node> m_owner;
93 RawPtrWillBeMember<LocalFrame> m_owningFrame;
95 WillBeHeapHashMap<unsigned, RawPtrWillBeMember<RenderScrollbarPart> > m_parts;
98 DEFINE_TYPE_CASTS(RenderScrollbar, ScrollbarThemeClient, scrollbar, scrollbar->isCustomScrollbar(), scrollbar.isCustomScrollbar());
102 #endif // RenderScrollbar_h