| /* |
| * Copyright (C) 2014 Igalia S.L. |
| * |
| * 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. AND ITS CONTRIBUTORS ``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 ITS 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. |
| */ |
| |
| #pragma once |
| |
| #include <WebCore/FloatPoint.h> |
| #include <wtf/Noncopyable.h> |
| #include <wtf/RunLoop.h> |
| #include <wtf/glib/GRefPtr.h> |
| |
| typedef union _GdkEvent GdkEvent; |
| typedef struct _GdkEventTouch GdkEventTouch; |
| typedef struct _GdkEventSequence GdkEventSequence; |
| typedef struct _GtkGesture GtkGesture; |
| |
| namespace WebKit { |
| |
| class GestureControllerClient { |
| public: |
| virtual ~GestureControllerClient() = default; |
| |
| virtual void tap(GdkEventTouch*) = 0; |
| |
| virtual void startDrag(GdkEventTouch*, const WebCore::FloatPoint&) = 0; |
| virtual void drag(GdkEventTouch*, const WebCore::FloatPoint&, const WebCore::FloatPoint&) = 0; |
| virtual void cancelDrag() = 0; |
| |
| virtual void swipe(GdkEventTouch*, const WebCore::FloatPoint&) = 0; |
| |
| virtual void startZoom(const WebCore::IntPoint& center, double& initialScale, WebCore::IntPoint& initialPoint) = 0; |
| virtual void zoom(double scale, const WebCore::IntPoint& origin) = 0; |
| |
| virtual void longPress(GdkEventTouch*) = 0; |
| }; |
| |
| class GestureController { |
| WTF_MAKE_NONCOPYABLE(GestureController); |
| WTF_MAKE_FAST_ALLOCATED; |
| |
| public: |
| GestureController(GtkWidget*, std::unique_ptr<GestureControllerClient>&&); |
| |
| bool isProcessingGestures() const; |
| bool handleEvent(GdkEvent*); |
| |
| void reset() |
| { |
| m_dragGesture.reset(); |
| m_swipeGesture.reset(); |
| m_zoomGesture.reset(); |
| m_longpressGesture.reset(); |
| } |
| |
| private: |
| class Gesture { |
| public: |
| void reset(); |
| bool isActive() const; |
| void handleEvent(GdkEvent*); |
| |
| protected: |
| Gesture(GtkGesture*, GestureControllerClient&); |
| |
| GRefPtr<GtkGesture> m_gesture; |
| GestureControllerClient& m_client; |
| }; |
| |
| class DragGesture final : public Gesture { |
| public: |
| DragGesture(GtkWidget*, GestureControllerClient&); |
| |
| private: |
| // Notify that a drag started, allowing to stop kinetic deceleration. |
| void startDrag(GdkEvent*); |
| void handleDrag(GdkEvent*, double x, double y); |
| void cancelDrag(); |
| void handleTap(GdkEvent*); |
| void longPressFired(); |
| |
| static void begin(DragGesture*, double x, double y, GtkGesture*); |
| static void update(DragGesture*, double x, double y, GtkGesture*); |
| static void end(DragGesture*, GdkEventSequence*, GtkGesture*); |
| static void cancel(DragGesture*, GdkEventSequence*, GtkGesture*); |
| |
| WebCore::FloatPoint m_start; |
| WebCore::FloatPoint m_offset; |
| RunLoop::Timer<DragGesture> m_longPressTimeout; |
| GRefPtr<GtkGesture> m_longPress; |
| bool m_inDrag { false }; |
| }; |
| |
| class SwipeGesture final : public Gesture { |
| public: |
| SwipeGesture(GtkWidget*, GestureControllerClient&); |
| |
| private: |
| void startMomentumScroll(GdkEvent*, double velocityX, double velocityY); |
| |
| static void swipe(SwipeGesture*, double velocityX, double velocityY, GtkGesture*); |
| }; |
| |
| class ZoomGesture final : public Gesture { |
| public: |
| ZoomGesture(GtkWidget*, GestureControllerClient&); |
| |
| private: |
| WebCore::IntPoint center() const; |
| void startZoom(); |
| void handleZoom(); |
| |
| static void begin(ZoomGesture*, GdkEventSequence*, GtkGesture*); |
| static void scaleChanged(ZoomGesture*, double scale, GtkGesture*); |
| |
| double m_initialScale { 0 }; |
| double m_scale { 0 }; |
| WebCore::IntPoint m_initialPoint; |
| WebCore::IntPoint m_viewPoint; |
| RunLoop::Timer<ZoomGesture> m_idle; |
| }; |
| |
| class LongPressGesture final : public Gesture { |
| public: |
| LongPressGesture(GtkWidget*, GestureControllerClient&); |
| |
| private: |
| void longPressed(GdkEvent*); |
| |
| static void pressed(LongPressGesture*, double x, double y, GtkGesture*); |
| }; |
| |
| std::unique_ptr<GestureControllerClient> m_client; |
| DragGesture m_dragGesture; |
| SwipeGesture m_swipeGesture; |
| ZoomGesture m_zoomGesture; |
| LongPressGesture m_longpressGesture; |
| }; |
| |
| } // namespace WebKit |