Moving all the PlatformEvent subclasses from core/platform to platform

Source/platform/PlatformWheelEvent.h

+/*
+ * Copyright (C) 2004, 2005, 2006, 2009 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 PlatformWheelEvent_h
+#define PlatformWheelEvent_h
+
+#include "platform/PlatformEvent.h"
+#include "platform/geometry/IntPoint.h"
+
+namespace WebCore {
+
+class FloatPoint;
+class FloatSize;
+
+// Wheel events come in two flavors:
+// The ScrollByPixelWheelEvent is a fine-grained event that specifies the precise number of pixels to scroll. It is sent directly by MacBook touchpads on OS X,
+// and synthesized in other cases where platforms generate line-by-line scrolling events.
+// The ScrollByPageWheelEvent indicates that the wheel event should scroll an entire page. In this case WebCore's built in paging behavior is used to page
+// up and down (you get the same behavior as if the user was clicking in a scrollbar track to page up or page down).
+enum PlatformWheelEventGranularity {
+    ScrollByPageWheelEvent,
+    ScrollByPixelWheelEvent,
+};
+
+#if OS(MACOSX)
+enum PlatformWheelEventPhase {
+    PlatformWheelEventPhaseNone        = 0,
+    PlatformWheelEventPhaseBegan       = 1 << 0,
+    PlatformWheelEventPhaseStationary  = 1 << 1,
+    PlatformWheelEventPhaseChanged     = 1 << 2,
+    PlatformWheelEventPhaseEnded       = 1 << 3,
+    PlatformWheelEventPhaseCancelled   = 1 << 4,
+    PlatformWheelEventPhaseMayBegin    = 1 << 5,
+};
+#endif
+
+class PlatformWheelEvent : public PlatformEvent {
+public:
+    PlatformWheelEvent()
+        : PlatformEvent(PlatformEvent::Wheel)
+        , m_deltaX(0)
+        , m_deltaY(0)
+        , m_wheelTicksX(0)
+        , m_wheelTicksY(0)
+        , m_granularity(ScrollByPixelWheelEvent)
+        , m_directionInvertedFromDevice(false)
+        , m_hasPreciseScrollingDeltas(false)
+#if OS(MACOSX)
+        , m_phase(PlatformWheelEventPhaseNone)
+        , m_momentumPhase(PlatformWheelEventPhaseNone)
+        , m_scrollCount(0)
+        , m_unacceleratedScrollingDeltaX(0)
+        , m_unacceleratedScrollingDeltaY(0)
+#endif
+    {
+    }
+
+    PlatformWheelEvent(IntPoint position, IntPoint globalPosition, float deltaX, float deltaY, float wheelTicksX, float wheelTicksY, PlatformWheelEventGranularity granularity, bool shiftKey, bool ctrlKey, bool altKey, bool metaKey)
+        : PlatformEvent(PlatformEvent::Wheel, shiftKey, ctrlKey, altKey, metaKey, 0)
+        , m_position(position)
+        , m_globalPosition(globalPosition)
+        , m_deltaX(deltaX)
+        , m_deltaY(deltaY)
+        , m_wheelTicksX(wheelTicksX)
+        , m_wheelTicksY(wheelTicksY)
+        , m_granularity(granularity)
+        , m_directionInvertedFromDevice(false)
+        , m_hasPreciseScrollingDeltas(false)
+#if OS(MACOSX)
+        , m_phase(PlatformWheelEventPhaseNone)
+        , m_momentumPhase(PlatformWheelEventPhaseNone)
+        , m_scrollCount(0)
+        , m_unacceleratedScrollingDeltaX(0)
+        , m_unacceleratedScrollingDeltaY(0)
+#endif
+    {
+    }
+
+    PlatformWheelEvent copyTurningVerticalTicksIntoHorizontalTicks() const
+    {
+        PlatformWheelEvent copy = *this;
+
+        copy.m_deltaX = copy.m_deltaY;
+        copy.m_deltaY = 0;
+        copy.m_wheelTicksX = copy.m_wheelTicksY;
+        copy.m_wheelTicksY = 0;
+
+        return copy;
+    }
+
+    const IntPoint& position() const { return m_position; } // PlatformWindow coordinates.
+    const IntPoint& globalPosition() const { return m_globalPosition; } // Screen coordinates.
+
+    float deltaX() const { return m_deltaX; }
+    float deltaY() const { return m_deltaY; }
+
+    float wheelTicksX() const { return m_wheelTicksX; }
+    float wheelTicksY() const { return m_wheelTicksY; }
+
+    PlatformWheelEventGranularity granularity() const { return m_granularity; }
+
+    bool directionInvertedFromDevice() const { return m_directionInvertedFromDevice; }
+
+    bool hasPreciseScrollingDeltas() const { return m_hasPreciseScrollingDeltas; }
+    void setHasPreciseScrollingDeltas(bool b) { m_hasPreciseScrollingDeltas = b; }
+#if OS(MACOSX)
+    PlatformWheelEventPhase phase() const { return m_phase; }
+    PlatformWheelEventPhase momentumPhase() const { return m_momentumPhase; }
+    unsigned scrollCount() const { return m_scrollCount; }
+    float unacceleratedScrollingDeltaX() const { return m_unacceleratedScrollingDeltaX; }
+    float unacceleratedScrollingDeltaY() const { return m_unacceleratedScrollingDeltaY; }
+    bool useLatchedEventNode() const { return m_momentumPhase == PlatformWheelEventPhaseBegan || m_momentumPhase == PlatformWheelEventPhaseChanged; }
+#else
+    bool useLatchedEventNode() const { return false; }
+#endif
+
+protected:
+    IntPoint m_position;
+    IntPoint m_globalPosition;
+    float m_deltaX;
+    float m_deltaY;
+    float m_wheelTicksX;
+    float m_wheelTicksY;
+    PlatformWheelEventGranularity m_granularity;
+    bool m_directionInvertedFromDevice;
+    bool m_hasPreciseScrollingDeltas;
+#if OS(MACOSX)
+    PlatformWheelEventPhase m_phase;
+    PlatformWheelEventPhase m_momentumPhase;
+    unsigned m_scrollCount;
+    float m_unacceleratedScrollingDeltaX;
+    float m_unacceleratedScrollingDeltaY;
+#endif
+};
+
+} // namespace WebCore
+
+#endif // PlatformWheelEvent_h