| /* |
| * Copyright (C) 2008, 2009 Apple Inc. All Rights Reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef LayoutScrollbar_h |
| #define LayoutScrollbar_h |
| |
| #include "core/style/ComputedStyleConstants.h" |
| #include "platform/heap/Handle.h" |
| #include "platform/scroll/Scrollbar.h" |
| #include "wtf/HashMap.h" |
| |
| namespace blink { |
| |
| class ComputedStyle; |
| class Element; |
| class LayoutBox; |
| class LayoutScrollbarPart; |
| |
| class LayoutScrollbar final : public Scrollbar { |
| public: |
| static Scrollbar* createCustomScrollbar(ScrollableArea*, |
| ScrollbarOrientation, |
| Element*); |
| ~LayoutScrollbar() override; |
| |
| // The LayoutBox that supplies our style information. If the scrollbar is for |
| // a document, this is either the <body> or <html> element. Otherwise, it is |
| // the element that owns our PaintLayerScrollableArea. |
| LayoutBox* styleSource() const; |
| |
| IntRect buttonRect(ScrollbarPart) const; |
| IntRect trackRect(int startLength, int endLength) const; |
| IntRect trackPieceRectWithMargins(ScrollbarPart, const IntRect&) const; |
| |
| int minimumThumbLength() const; |
| |
| bool isOverlayScrollbar() const override { return false; } |
| |
| LayoutScrollbarPart* getPart(ScrollbarPart partType) { |
| return m_parts.at(partType); |
| } |
| const LayoutScrollbarPart* getPart(ScrollbarPart partType) const { |
| return m_parts.at(partType); |
| } |
| |
| void invalidateDisplayItemClientsOfScrollbarParts(); |
| |
| void setVisualRect(const LayoutRect&) final; |
| |
| DECLARE_VIRTUAL_TRACE(); |
| |
| protected: |
| LayoutScrollbar(ScrollableArea*, ScrollbarOrientation, Element*); |
| |
| private: |
| friend class Scrollbar; |
| |
| void setParent(FrameViewBase*) override; |
| void setEnabled(bool) override; |
| |
| void setHoveredPart(ScrollbarPart) override; |
| void setPressedPart(ScrollbarPart) override; |
| |
| void styleChanged() override; |
| |
| bool isCustomScrollbar() const override { return true; } |
| |
| void updateScrollbarParts(bool destroy = false); |
| |
| PassRefPtr<ComputedStyle> getScrollbarPseudoStyle(ScrollbarPart, PseudoId); |
| void updateScrollbarPart(ScrollbarPart, bool destroy = false); |
| |
| // The element that supplies our style information. |
| Member<Element> m_styleSource; |
| |
| HashMap<unsigned, LayoutScrollbarPart*> m_parts; |
| }; |
| |
| DEFINE_TYPE_CASTS(LayoutScrollbar, |
| ScrollbarThemeClient, |
| scrollbar, |
| scrollbar->isCustomScrollbar(), |
| scrollbar.isCustomScrollbar()); |
| |
| } // namespace blink |
| |
| #endif // LayoutScrollbar_h |
