Create GestureManager class and move related logic

third_party/WebKit/Source/core/input/GestureManager.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef GestureManager_h
+#define GestureManager_h
+
+#include "core/CoreExport.h"
+#include "core/frame/LocalFrame.h"
+#include "core/layout/HitTestRequest.h"
+#include "core/page/EventWithHitTestResults.h"
+#include "platform/PlatformEvent.h"
+#include "public/platform/WebInputEventResult.h"
+
+namespace blink {
+
+class ScrollManager;
+class SelectionController;
+class PointerEventManager;
+
+// This class takes care of gestures and delegating the action based on the
+// gesture to the responsible class.
+class CORE_EXPORT GestureManager {
+    WTF_MAKE_NONCOPYABLE(GestureManager);
+    DISALLOW_NEW();
+
+public:
+    GestureManager(LocalFrame*, ScrollManager*, PointerEventManager*,
+        SelectionController*);
+    ~GestureManager();
+    DECLARE_TRACE();
+
+    void clear();
+
+    HitTestRequest::HitTestRequestType getHitTypeForGestureType(PlatformEvent::EventType);
+    WebInputEventResult handleGestureEventInFrame(const GestureEventWithHitTestResults&);
+
+    // TODO(nzolghadr): This can probably be hidden and the related logic
+    // be moved to this class (see crrev.com/112023010). Since that might cause
+    // regression it's better to move that logic in another change.
+    double getLastShowPressTimestamp() const;
+
+private:
+    WebInputEventResult handleGestureShowPress();
+    WebInputEventResult handleGestureTapDown(const GestureEventWithHitTestResults&);
+    WebInputEventResult handleGestureTap(const GestureEventWithHitTestResults&);
+    WebInputEventResult handleGestureLongPress(const GestureEventWithHitTestResults&);
+    WebInputEventResult handleGestureLongTap(const GestureEventWithHitTestResults&);
+
+    FrameHost* frameHost() const;
+
+    // NOTE: If adding a new field to this class please ensure that it is
+    // cleared if needed in |GestureManager::clear()|.
+
+    const Member<LocalFrame> m_frame;
+
+    ScrollManager* m_scrollManager;
+    PointerEventManager* m_pointerEventManager;
+
+    // Set on GestureTapDown if the |pointerdown| event corresponding to the
+    // triggering |touchstart| event was canceled. This suppresses mouse event
+    // firing for the current gesture sequence (i.e. until next GestureTapDown).
+    bool m_suppressMouseEventsFromGestures;
+
+    bool m_longTapShouldInvokeContextMenu;
+
+    const Member<SelectionController> m_selectionController;
+
+    double m_lastShowPressTimestamp;
+};
+
+} // namespace blink
+
+#endif // GestureManager_h