Moving GraphicsContext and dependencies from core to platform.

Source/core/platform/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 Scrollbar_h
-#define Scrollbar_h
-
-#include "platform/Timer.h"
-#include "platform/Widget.h"
-#include "platform/scroll/ScrollTypes.h"
-#include "platform/scroll/ScrollbarThemeClient.h"
-#include "wtf/MathExtras.h"
-#include "wtf/PassRefPtr.h"
-
-namespace WebCore {
-
-class GraphicsContext;
-class IntRect;
-class PlatformGestureEvent;
-class PlatformMouseEvent;
-class ScrollableArea;
-class ScrollbarTheme;
-class ScrollView;
-
-class Scrollbar : public Widget,
-                  public ScrollbarThemeClient {
-
-public:
-    static PassRefPtr<Scrollbar> create(ScrollableArea*, ScrollbarOrientation, ScrollbarControlSize);
-
-    virtual ~Scrollbar();
-
-    // ScrollbarThemeClient implementation.
-    virtual int x() const { return Widget::x(); }
-    virtual int y() const { return Widget::y(); }
-    virtual int width() const { return Widget::width(); }
-    virtual int height() const { return Widget::height(); }
-    virtual IntSize size() const { return Widget::size(); }
-    virtual IntPoint location() const { return Widget::location(); }
-
-    virtual Widget* parent() const { return Widget::parent(); }
-    virtual Widget* root() const { return Widget::root(); }
-
-    void removeFromParent();
-    ScrollView* parentScrollView() const;
-    ScrollView* rootScrollView() const;
-
-    virtual void setFrameRect(const IntRect&);
-    virtual IntRect frameRect() const { return Widget::frameRect(); }
-
-    virtual void invalidate() { Widget::invalidate(); }
-    virtual void invalidateRect(const IntRect&);
-
-    virtual ScrollbarOverlayStyle scrollbarOverlayStyle() const;
-    virtual void getTickmarks(Vector<IntRect>&) const;
-    virtual bool isScrollableAreaActive() const;
-    virtual bool isScrollViewScrollbar() const;
-
-    virtual IntPoint convertFromContainingWindow(const IntPoint& windowPoint) { return Widget::convertFromContainingWindow(windowPoint); }
-
-    virtual bool isCustomScrollbar() const { return false; }
-    virtual ScrollbarOrientation orientation() const { return m_orientation; }
-    virtual bool isLeftSideVerticalScrollbar() const;
-
-    virtual int value() const { return lroundf(m_currentPos); }
-    virtual float currentPos() const { return m_currentPos; }
-    virtual int visibleSize() const { return m_visibleSize; }
-    virtual int totalSize() const { return m_totalSize; }
-    virtual int maximum() const { return m_totalSize - m_visibleSize; }
-    virtual ScrollbarControlSize controlSize() const { return m_controlSize; }
-
-    virtual ScrollbarPart pressedPart() const { return m_pressedPart; }
-    virtual ScrollbarPart hoveredPart() const { return m_hoveredPart; }
-
-    virtual void styleChanged() { }
-
-    virtual bool enabled() const { return m_enabled; }
-    virtual void setEnabled(bool);
-
-    // 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; }
-
-    virtual void setHoveredPart(ScrollbarPart);
-    virtual void setPressedPart(ScrollbarPart);
-
-    void setProportion(int visibleSize, int totalSize);
-    void setPressedPos(int p) { m_pressedPos = p; }
-
-    virtual void paint(GraphicsContext*, const IntRect& damageRect);
-
-    virtual bool isOverlayScrollbar() const;
-    bool shouldParticipateInHitTesting();
-
-    bool isWindowActive() const;
-
-    bool gestureEvent(const PlatformGestureEvent&);
-
-    // These methods are used for platform scrollbars to give :hover feedback.  They will not get called
-    // when the mouse went down in a scrollbar, since it is assumed the scrollbar will start
-    // grabbing all events in that case anyway.
-    void mouseMoved(const PlatformMouseEvent&);
-    void mouseEntered();
-    void mouseExited();
-
-    // Used by some platform scrollbars to know when they've been released from capture.
-    void mouseUp(const PlatformMouseEvent&);
-    void mouseDown(const PlatformMouseEvent&);
-
-    ScrollbarTheme* theme() const { return m_theme; }
-
-    virtual void setParent(Widget*) OVERRIDE;
-
-    bool suppressInvalidation() const { return m_suppressInvalidation; }
-    void setSuppressInvalidation(bool s) { m_suppressInvalidation = s; }
-
-    virtual IntRect convertToContainingView(const IntRect&) const;
-    virtual IntRect convertFromContainingView(const IntRect&) const;
-
-    virtual IntPoint convertToContainingView(const IntPoint&) const;
-    virtual IntPoint convertFromContainingView(const IntPoint&) const;
-
-    void moveThumb(int pos, bool draggingDocument = false);
-
-    virtual bool isAlphaLocked() const { return m_isAlphaLocked; }
-    virtual void setIsAlphaLocked(bool flag) { m_isAlphaLocked = flag; }
-
-protected:
-    Scrollbar(ScrollableArea*, ScrollbarOrientation, ScrollbarControlSize, ScrollbarTheme* = 0);
-
-    void updateThumb();
-    virtual void updateThumbPosition();
-    virtual void updateThumbProportion();
-
-    void autoscrollTimerFired(Timer<Scrollbar>*);
-    void startTimerIfNeeded(double delay);
-    void stopTimerIfNeeded();
-    void autoscrollPressedPart(double delay);
-    ScrollDirection pressedPartScrollDirection();
-    ScrollGranularity pressedPartScrollGranularity();
-
-    ScrollableArea* m_scrollableArea;
-    ScrollbarOrientation m_orientation;
-    ScrollbarControlSize m_controlSize;
-    ScrollbarTheme* m_theme;
-
-    int m_visibleSize;
-    int m_totalSize;
-    float m_currentPos;
-    float m_dragOrigin;
-
-    ScrollbarPart m_hoveredPart;
-    ScrollbarPart m_pressedPart;
-    int m_pressedPos;
-    float m_scrollPos;
-    bool m_draggingDocument;
-    int m_documentDragPos;
-
-    bool m_enabled;
-
-    Timer<Scrollbar> m_scrollTimer;
-    bool m_overlapsResizer;
-
-    bool m_suppressInvalidation;
-
-    bool m_isAlphaLocked;
-
-private:
-    virtual bool isScrollbar() const { return true; }
-
-    float scrollableAreaCurrentPos() const;
-};
-
-inline Scrollbar* toScrollbar(Widget* widget)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!widget || widget->isScrollbar());
-    return static_cast<Scrollbar*>(widget);
-}
-
-inline const Scrollbar* toScrollbar(const Widget* widget)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!widget || widget->isScrollbar());
-    return static_cast<const Scrollbar*>(widget);
-}
-
-// This will catch anyone doing an unnecessary cast.
-void toScrollbar(const Scrollbar*);
-
-} // namespace WebCore
-
-#endif // Scrollbar_h