Remove ScrollableArea and Scrollbar

sky/engine/platform/scroll/Scrollbar.h

-/*
- * Copyright (C) 2004, 2006 Apple Computer, 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 COMPUTER, 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 COMPUTER, 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 SKY_ENGINE_PLATFORM_SCROLL_SCROLLBAR_H_
-#define SKY_ENGINE_PLATFORM_SCROLL_SCROLLBAR_H_
-
-#include "sky/engine/platform/Timer.h"
-#include "sky/engine/platform/Widget.h"
-#include "sky/engine/platform/scroll/ScrollTypes.h"
-#include "sky/engine/platform/scroll/Scrollbar.h"
-#include "sky/engine/wtf/MathExtras.h"
-#include "sky/engine/wtf/PassRefPtr.h"
-
-namespace blink {
-
-class GraphicsContext;
-class IntRect;
-class ScrollableArea;
-
-class PLATFORM_EXPORT Scrollbar final : public Widget {
-public:
-    static PassRefPtr<Scrollbar> create(ScrollableArea*, ScrollbarOrientation);
-
-    virtual ~Scrollbar();
-
-    bool isScrollableAreaActive() const;
-
-    ScrollbarOrientation orientation() const { return m_orientation; }
-    bool isLeftSideVerticalScrollbar() const;
-
-    int value() const { return lroundf(m_currentPos); }
-    float currentPos() const { return m_currentPos; }
-    int visibleSize() const { return m_visibleSize; }
-    int totalSize() const { return m_totalSize; }
-    int maximum() const { return m_totalSize - m_visibleSize; }
-
-    // Called by the ScrollableArea when the scroll offset changes.
-    void offsetDidChange();
-
-    void disconnectFromScrollableArea() { m_scrollableArea = 0; }
-    ScrollableArea* scrollableArea() const { return m_scrollableArea; }
-
-    int pressedPos() const { return m_pressedPos; }
-
-    void setHoveredPart(ScrollbarPart);
-    void setPressedPart(ScrollbarPart);
-
-    void setProportion(int visibleSize, int totalSize);
-    void setPressedPos(int p) { m_pressedPos = p; }
-
-    virtual void paint(GraphicsContext*, const IntRect& damageRect) override;
-
-    bool isOverlayScrollbar() const;
-    bool shouldParticipateInHitTesting();
-
-    virtual IntRect convertToContainingView(const IntRect&) const override;
-    virtual IntRect convertFromContainingView(const IntRect&) const override;
-
-    virtual IntPoint convertToContainingView(const IntPoint&) const override;
-    virtual IntPoint convertFromContainingView(const IntPoint&) const override;
-
-    void moveThumb(int pos);
-
-    static int scrollbarThickness();
-
-    // The position of the thumb relative to the track.
-    int thumbPosition();
-    // The length of the thumb along the axis of the scrollbar.
-    int thumbLength();
-    // The position of the track relative to the scrollbar.
-    int trackPosition();
-    // The length of the track along the axis of the scrollbar.
-    int trackLength();
-
-    IntRect trackRect();
-    IntRect thumbRect();
-    int thumbThickness();
-
-    int minimumThumbLength();
-
-    void splitTrack(const IntRect& track, IntRect& startTrack, IntRect& thumb, IntRect& endTrack);
-
-    void paintThumb(GraphicsContext*, const IntRect&);
-
-    double initialAutoscrollTimerDelay() { return 0.25; }
-    double autoscrollTimerDelay() { return 0.05; }
-
-protected:
-    Scrollbar(ScrollableArea*, ScrollbarOrientation);
-
-    void autoscrollTimerFired(Timer<Scrollbar>*);
-    void startTimerIfNeeded(double delay);
-    void stopTimerIfNeeded();
-    void autoscrollPressedPart(double delay);
-    ScrollDirection pressedPartScrollDirection();
-    ScrollGranularity pressedPartScrollGranularity();
-
-    ScrollableArea* m_scrollableArea;
-    ScrollbarOrientation m_orientation;
-
-    int m_visibleSize;
-    int m_totalSize;
-    float m_currentPos;
-    float m_dragOrigin;
-
-    // FIXME(sky): Does any of this hovered/pressed tracking do anything
-    // since we only have overlay scrollbars?
-    ScrollbarPart m_hoveredPart;
-    ScrollbarPart m_pressedPart;
-    int m_pressedPos;
-    float m_scrollPos;
-    int m_documentDragPos;
-
-    Timer<Scrollbar> m_scrollTimer;
-    bool m_overlapsResizer;
-
-private:
-    virtual bool isScrollbar() const override { return true; }
-
-    float scrollableAreaCurrentPos() const;
-};
-
-DEFINE_TYPE_CASTS(Scrollbar, Widget, widget, widget->isScrollbar(), widget.isScrollbar());
-
-} // namespace blink
-
-#endif  // SKY_ENGINE_PLATFORM_SCROLL_SCROLLBAR_H_