Move many files that were suffixed Win.cpp to Chromium.cpp, and place them in...

webkit/port/platform/PlatformScrollBar.h

-/*
- * Copyright (C) 2004, 2005, 2006, 2007 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 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 PlatformScrollbar_h
-#define PlatformScrollbar_h
-
-#include <windows.h>
-
-#include "Widget.h"
-#include "ScrollBar.h"
-#include "Timer.h"
-
-namespace gfx {
-class PlatformCanvasWin;
-}
-
-namespace WebCore {
-
-// IMPORTANT NOTES ABOUT SCROLLBARS
-//
-// WebKit uses scrollbars in two ways.  The first way is as a scroll control
-// for a ScrollView.  This scrollbar sits inside the ScrollView's rect and
-// modifies its scrollOffset.  Because it is inside the ScrollView's rect, it
-// is a child of the ScrollView, but because it is not really part of the
-// scrollView's content, it doesn't move as the scrollOffset changes.
-//
-// The second use is as a scroll control for things other than a ScrollView,
-// e.g. a <select>.  A <select> is not a ScrollView, so the scrollbar is not a
-// child of it -- instead, it is a child of the ScrollView representing the
-// frame in which the <select> (and the scrollbar) are located.  In this case,
-// the scrollbar IS part of the ScrollView's content, and it moves when the
-// scrollOffset changes.
-//
-// ScrollViewWin distinguishes these two cases in its convertChildToSelf and
-// convertSelfToChild methods, which are used when converting coordinates
-// between the ScrollBar's coordinate system and that of the native window.
-
-class PlatformScrollbar : public Widget, public Scrollbar {
-public:
-    static PassRefPtr<PlatformScrollbar> create(ScrollbarClient* client, ScrollbarOrientation orientation, ScrollbarControlSize size)
-    {
-        return adoptRef(new PlatformScrollbar(client, orientation, size));
-    }
-    virtual ~PlatformScrollbar();
-
-    virtual bool isWidget() const { return true; }
-
-    virtual int width() const;
-    virtual int height() const;
-    virtual void setRect(const IntRect&);
-    virtual void setEnabled(bool);
-    virtual bool isEnabled() const { return m_enabled; }
-    virtual void paint(GraphicsContext*, const IntRect& damageRect);
-
-    virtual void setFrameGeometry(const IntRect& rect);
-
-    // All mouse handler functions below receive mouse events in window
-    // coordinates.
-
-    // NOTE: These may be called after we've been removed from the widget/
-    // window hierarchy, for example because the EventHandler keeps a reference
-    // around and tries to feed us MouseOut events.  In this case, doing
-    // something would be not only pointless but dangerous, as without a
-    // parent() we will end up failing an ASSERT().  So bail early if we get to
-    // any of these with no parent().
-    virtual bool handleMouseMoveEvent(const PlatformMouseEvent&);
-    virtual bool handleMouseOutEvent(const PlatformMouseEvent&);
-    virtual bool handleMousePressEvent(const PlatformMouseEvent&);
-    virtual bool handleMouseReleaseEvent(const PlatformMouseEvent&);
-
-    virtual IntRect windowClipRect() const;
-
-    static void themeChanged();
-    static int horizontalScrollbarHeight(ScrollbarControlSize size = RegularScrollbar);
-    static int verticalScrollbarWidth(ScrollbarControlSize size = RegularScrollbar);
-
-    // Scrolls the page when auto-repeat scrolling.
-    void autoscrollTimerFired(Timer<PlatformScrollbar>*);
-
-    // This function receives events in window coordinates.
-    void handleMouseMoveEventWhenCapturing(const PlatformMouseEvent& e);
-
-protected:
-    virtual void updateThumbPosition();
-    virtual void updateThumbProportion();
-
-private:
-    PlatformScrollbar(ScrollbarClient*, ScrollbarOrientation, ScrollbarControlSize);
-
-    // Scroll bar segment identifiers
-    enum Segment {
-        Arrow1 = 0,
-        Track,        // Only used when scrollbar does not contain a thumb
-        BeforeThumb,  // -|
-        Thumb,        // -+ Only used when scrollbar contains a thumb
-        AfterThumb,   // -|
-        Arrow2,
-        None,
-        NumSegments = None
-    };
-
-    // Turns on/off whether we have mouse capture.  This is only for tracking,
-    // as the EventHandler is what controls the actual capture.
-    void setCapturingMouse(bool capturing);
-
-    // Returns the girth of the scrollbar arrow button for layout, given the
-    // system metrics code for the desired direction's button and a limiting
-    // height (for vertical scroll bars) or width (for horizontal scrollbars).
-    // Also computes the background span (available remaining space).
-    int scrollButtonGirth(int systemMetricsCode, int limit,
-                          int* backgroundSpan);
-
-    // Returns the girth of the scrollbar thumb for layout, given the system
-    // metrics code for the desired direction's thumb and the background span
-    // (space remaining after the buttons are drawn).
-    int scrollThumbGirth(int systemMetricsCode, int backgroundSpan);
-
-    // Computes the layout of the scroll bar given its current configuration.
-    void layout();
-
-    // Sets the current mouse position to the coordinates in |event|.
-    void updateMousePosition(int x, int y);
-
-    // Helper routine for updateMousePosition(), used to bypass layout().
-    void updateMousePositionInternal();
-
-    // Returns the correct state for the theme engine to draw a segment.
-    int getThemeState(Segment target) const;
-    int getThemeArrowState(Segment target) const;
-    int getClassicThemeState(Segment target) const;
-
-    // Draws the tick-marks on the scrollbar. The tick-marks are visual
-    // indicators showing the results from a find-in-page operation.
-    void DrawTickmarks(GraphicsContext* context) const;
-
-    IntPoint m_lastNativePos;   // The last (native) mouse coordinate received.
-    struct {
-        int thumbPos;           // Relevant (window) mouse coordinate, and...
-        int scrollVal;          // ...current scrollvalue, when...
-    } m_dragOrigin;             // ...user begins dragging the thumb.
-    RECT m_segmentRects[NumSegments];
-                                // The native coordinates of the scrollbar
-                                // segments.
-    Segment m_mouseOver;        // The scrollbar segment the mouse is over.
-    Segment m_captureStart;     // The segment on which we started capture.
-    Timer<PlatformScrollbar> m_autorepeatTimer;
-                                // Timer to start and continue auto-repeat
-                                // scrolling when the button is held down.
-    bool m_enabled;             // True when the scrollbar is enabled.
-    bool m_needsLayout;         // True when cached geometry may have changed
-
-    // Multipliers against scrollbar thickness that determine how far away from
-    // the scrollbar track the cursor can go before the thumb "snaps back"
-    static const int kOffSideMultiplier;
-    static const int kOffEndMultiplier;
-
-    // Auto-repeat delays, in seconds
-    static const double kAutorepeatInitialDelay;
-    static const double kAutorepeatRepeatInterval;
-};
-
-}
-
-#endif // PlatformScrollbar_h
-