Remove ScrollableArea and Scrollbar

sky/engine/platform/scroll/ScrollableArea.h

Index: sky/engine/platform/scroll/ScrollableArea.h
diff --git a/sky/engine/platform/scroll/ScrollableArea.h b/sky/engine/platform/scroll/ScrollableArea.h
deleted file mode 100644
index 0eb0ef4a4078ff8b873c19f26bdd473e1d081287..0000000000000000000000000000000000000000
--- a/sky/engine/platform/scroll/ScrollableArea.h
+++ /dev/null
@@ -1,189 +0,0 @@
-/*
- * Copyright (C) 2008, 2011 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 SKY_ENGINE_PLATFORM_SCROLL_SCROLLABLEAREA_H_
-#define SKY_ENGINE_PLATFORM_SCROLL_SCROLLABLEAREA_H_
-
-#include "sky/engine/platform/PlatformExport.h"
-#include "sky/engine/platform/scroll/ScrollAnimator.h"
-#include "sky/engine/platform/scroll/Scrollbar.h"
-#include "sky/engine/wtf/Noncopyable.h"
-#include "sky/engine/wtf/Vector.h"
-
-namespace blink {
-
-class FloatPoint;
-class HostWindow;
-class ScrollAnimator;
-
-enum ScrollBehavior {
-    ScrollBehaviorAuto,
-    ScrollBehaviorInstant,
-    ScrollBehaviorSmooth,
-};
-
-enum IncludeScrollbarsInRect {
-    ExcludeScrollbars,
-    IncludeScrollbars,
-};
-
-class PLATFORM_EXPORT ScrollableArea {
-    WTF_MAKE_NONCOPYABLE(ScrollableArea);
-public:
-    static int pixelsPerLineStep();
-    static float minFractionToStepWhenPaging();
-    static int maxOverlapBetweenPages();
-
-    // The window that hosts the ScrollView. The ScrollView will communicate scrolls and repaints to the
-    // host window in the window's coordinate space.
-    virtual HostWindow* hostWindow() const = 0;
-
-    bool scroll(ScrollDirection, ScrollGranularity, float delta = 1);
-    void scrollToOffsetWithoutAnimation(const FloatPoint&);
-    void scrollToOffsetWithoutAnimation(ScrollbarOrientation, float offset);
-
-    static bool scrollBehaviorFromString(const String&, ScrollBehavior&);
-
-    // Functions for controlling if you can scroll past the end of the document.
-    bool constrainsScrollingToContentEdge() const { return m_constrainsScrollingToContentEdge; }
-    void setConstrainsScrollingToContentEdge(bool constrainsScrollingToContentEdge) { m_constrainsScrollingToContentEdge = constrainsScrollingToContentEdge; }
-
-    void setVerticalScrollElasticity(ScrollElasticity scrollElasticity) { m_verticalScrollElasticity = scrollElasticity; }
-    ScrollElasticity verticalScrollElasticity() const { return static_cast<ScrollElasticity>(m_verticalScrollElasticity); }
-
-    void setHorizontalScrollElasticity(ScrollElasticity scrollElasticity) { m_horizontalScrollElasticity = scrollElasticity; }
-    ScrollElasticity horizontalScrollElasticity() const { return static_cast<ScrollElasticity>(m_horizontalScrollElasticity); }
-
-    void contentAreaDidShow() const;
-    void contentAreaDidHide() const;
-
-    void finishCurrentScrollAnimations() const;
-
-    void didAddScrollbar(Scrollbar*, ScrollbarOrientation);
-    void willRemoveScrollbar(Scrollbar*, ScrollbarOrientation);
-
-    void contentsResized();
-
-    bool hasOverlayScrollbars() const;
-
-    // This getter will create a ScrollAnimator if it doesn't already exist.
-    ScrollAnimator* scrollAnimator() const;
-
-    // This getter will return null if the ScrollAnimator hasn't been created yet.
-    ScrollAnimator* existingScrollAnimator() const { return m_animators ? m_animators->scrollAnimator.get() : 0; }
-
-    const IntPoint& scrollOrigin() const { return m_scrollOrigin; }
-    bool scrollOriginChanged() const { return m_scrollOriginChanged; }
-
-    // FIXME(bokan): Meaningless name, rename to isActiveFocus
-    virtual bool isActive() const = 0;
-    virtual int scrollSize(ScrollbarOrientation) const = 0;
-
-    // Convert points and rects between the scrollbar and its containing view.
-    // The client needs to implement these in order to be aware of layout effects
-    // like CSS transforms.
-    virtual IntRect convertFromScrollbarToContainingView(const Scrollbar*, const IntRect&) const = 0;
-    virtual IntRect convertFromContainingViewToScrollbar(const Scrollbar*, const IntRect&) const = 0;
-    virtual IntPoint convertFromScrollbarToContainingView(const Scrollbar*, const IntPoint&) const = 0;
-    virtual IntPoint convertFromContainingViewToScrollbar(const Scrollbar*, const IntPoint&) const = 0;
-
-    virtual Scrollbar* horizontalScrollbar() const = 0;
-    virtual Scrollbar* verticalScrollbar() const = 0;
-
-    // scrollPosition is relative to the scrollOrigin. i.e. If the page is RTL
-    // then scrollPosition will be negative.
-    virtual IntPoint scrollPosition() const = 0;
-    virtual IntPoint minimumScrollPosition() const = 0;
-    virtual IntPoint maximumScrollPosition() const = 0;
-
-    virtual IntSize contentsSize() const = 0;
-
-    bool shouldSuspendScrollAnimations() const { return true; }
-
-    IntPoint clampScrollPosition(const IntPoint&) const;
-
-    // Returns true if the GraphicsLayer tree needs to be rebuilt.
-    virtual bool updateAfterCompositingChange() = 0;
-
-    virtual bool userInputScrollable(ScrollbarOrientation) const = 0;
-    virtual bool shouldPlaceVerticalScrollbarOnLeft() const = 0;
-
-    int scrollPosition(ScrollbarOrientation orientation) { return orientation == HorizontalScrollbar ? scrollPosition().x() : scrollPosition().y(); }
-    int minimumScrollPosition(ScrollbarOrientation orientation) { return orientation == HorizontalScrollbar ? minimumScrollPosition().x() : minimumScrollPosition().y(); }
-    int maximumScrollPosition(ScrollbarOrientation orientation) { return orientation == HorizontalScrollbar ? maximumScrollPosition().x() : maximumScrollPosition().y(); }
-    int clampScrollPosition(ScrollbarOrientation orientation, int pos)  { return std::max(std::min(pos, maximumScrollPosition(orientation)), minimumScrollPosition(orientation)); }
-
-protected:
-    ScrollableArea();
-    virtual ~ScrollableArea();
-
-    void setScrollOrigin(const IntPoint&);
-    void resetScrollOriginChanged() { m_scrollOriginChanged = false; }
-
-private:
-    void scrollPositionChanged(const IntPoint&);
-
-    // NOTE: Only called from the ScrollAnimator.
-    friend class ScrollAnimator;
-    void setScrollOffsetFromAnimation(const IntPoint&);
-
-    // This function should be overriden by subclasses to perform the actual
-    // scroll of the content.
-    virtual void setScrollOffset(const IntPoint&) = 0;
-
-    int lineStep(ScrollbarOrientation) const;
-    int documentStep(ScrollbarOrientation) const;
-    virtual int pageStep(ScrollbarOrientation) const = 0;
-    float pixelStep(ScrollbarOrientation) const;
-
-    struct ScrollableAreaAnimators {
-        OwnPtr<ScrollAnimator> scrollAnimator;
-    };
-
-    mutable OwnPtr<ScrollableAreaAnimators> m_animators;
-    unsigned m_constrainsScrollingToContentEdge : 1;
-
-    unsigned m_verticalScrollElasticity : 2; // ScrollElasticity
-    unsigned m_horizontalScrollElasticity : 2; // ScrollElasticity
-
-    unsigned m_scrollOriginChanged : 1;
-
-    // There are 8 possible combinations of writing mode and direction. Scroll origin will be non-zero in the x or y axis
-    // if there is any reversed direction or writing-mode. The combinations are:
-    // writing-mode / direction     scrollOrigin.x() set    scrollOrigin.y() set
-    // horizontal-tb / ltr          NO                      NO
-    // horizontal-tb / rtl          YES                     NO
-    // horizontal-bt / ltr          NO                      YES
-    // horizontal-bt / rtl          YES                     YES
-    // vertical-lr / ltr            NO                      NO
-    // vertical-lr / rtl            NO                      YES
-    // vertical-rl / ltr            YES                     NO
-    // vertical-rl / rtl            YES                     YES
-    IntPoint m_scrollOrigin;
-};
-
-} // namespace blink
-
-#endif  // SKY_ENGINE_PLATFORM_SCROLL_SCROLLABLEAREA_H_