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/*
* Copyright (C) 2008 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 THIRD_PARTY_BLINK_RENDERER_CORE_PAINT_CUSTOM_SCROLLBAR_THEME_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_PAINT_CUSTOM_SCROLLBAR_THEME_H_
#include "third_party/blink/renderer/core/scroll/scrollbar_theme.h"
namespace blink {
class CustomScrollbar;
class LayoutCustomScrollbarPart;
class WebMouseEvent;
struct PhysicalOffset;
struct PhysicalRect;
class CustomScrollbarTheme final : public ScrollbarTheme {
public:
~CustomScrollbarTheme() override = default;
int ScrollbarThickness(ScrollbarControlSize control_size) override {
return GetTheme().ScrollbarThickness(control_size);
}
WebScrollbarButtonsPlacement ButtonsPlacement() const override {
return GetTheme().ButtonsPlacement();
}
void PaintScrollCorner(GraphicsContext&,
const Scrollbar* vertical_scrollbar,
const DisplayItemClient&,
const IntRect& corner_rect,
WebColorScheme color_scheme) override;
bool ShouldCenterOnThumb(const Scrollbar& scrollbar,
const WebMouseEvent& event) override {
return GetTheme().ShouldCenterOnThumb(scrollbar, event);
}
bool ShouldSnapBackToDragOrigin(const Scrollbar& scrollbar,
const WebMouseEvent& event) override {
return GetTheme().ShouldSnapBackToDragOrigin(scrollbar, event);
}
base::TimeDelta InitialAutoscrollTimerDelay() override {
return GetTheme().InitialAutoscrollTimerDelay();
}
base::TimeDelta AutoscrollTimerDelay() override {
return GetTheme().AutoscrollTimerDelay();
}
void RegisterScrollbar(Scrollbar& scrollbar) override {
return GetTheme().RegisterScrollbar(scrollbar);
}
int MinimumThumbLength(const Scrollbar&) override;
void ButtonSizesAlongTrackAxis(const Scrollbar&,
int& before_size,
int& after_size);
static CustomScrollbarTheme* GetCustomScrollbarTheme();
static void PaintIntoRect(const LayoutCustomScrollbarPart&,
GraphicsContext&,
const PhysicalOffset& paint_offset,
const PhysicalRect&,
const CustomScrollbar* = nullptr);
protected:
bool HasButtons(const Scrollbar&) override;
bool HasThumb(const Scrollbar&) override;
IntRect BackButtonRect(const Scrollbar&, ScrollbarPart) override;
IntRect ForwardButtonRect(const Scrollbar&, ScrollbarPart) override;
IntRect TrackRect(const Scrollbar&) override;
void PaintTrackAndButtons(GraphicsContext&,
const Scrollbar&,
const IntPoint&) override;
void PaintButton(GraphicsContext&,
const Scrollbar&,
const IntRect&,
ScrollbarPart) override;
void PaintThumb(GraphicsContext&, const Scrollbar&, const IntRect&) override;
void PaintTickmarks(GraphicsContext&,
const Scrollbar&,
const IntRect&) override;
IntRect ConstrainTrackRectToTrackPieces(const Scrollbar&,
const IntRect&) override;
private:
void PaintScrollbarBackground(GraphicsContext&, const Scrollbar&);
void PaintTrackBackground(GraphicsContext&, const Scrollbar&, const IntRect&);
void PaintTrackPiece(GraphicsContext&,
const Scrollbar&,
const IntRect&,
ScrollbarPart);
void PaintPart(GraphicsContext&,
const Scrollbar&,
const IntRect&,
ScrollbarPart);
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_PAINT_CUSTOM_SCROLLBAR_THEME_H_
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