Framelet Prototype 2016

content/common/input/web_touch_event_traits.h

-// Copyright 2014 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 CONTENT_COMMON_INPUT_WEB_TOUCH_EVENT_TRAITS_H_
-#define CONTENT_COMMON_INPUT_WEB_TOUCH_EVENT_TRAITS_H_
-
-#include "content/common/input/scoped_web_input_event.h"
-#include "third_party/WebKit/public/web/WebInputEvent.h"
-
-namespace content {
-
-// Utility class for performing operations on and with WebTouchEvents.
-class CONTENT_EXPORT WebTouchEventTraits {
- public:
-  // Returns whether all touches in the event have the specified state.
-  static bool AllTouchPointsHaveState(const blink::WebTouchEvent& event,
-                                      blink::WebTouchPoint::State state);
-
-  // Returns whether this event represents a transition from no active
-  // touches to some active touches (the start of a new "touch sequence").
-  static bool IsTouchSequenceStart(const blink::WebTouchEvent& event);
-
-  // Returns whether this event represents a transition from active
-  // touches to no active touches (the end of a "touch sequence").
-  static bool IsTouchSequenceEnd(const blink::WebTouchEvent& event);
-
-  // Sets the type of |event| to |type|, resetting any other type-specific
-  // properties and updating the timestamp.
-  static void ResetType(blink::WebInputEvent::Type type,
-                        double timestamp_sec,
-                        blink::WebTouchEvent* event);
-
-  // Like ResetType but also resets the state of all active touches
-  // to match the event type.  This is particularly useful, for example,
-  // in sending a touchcancel for all active touches.
-  static void ResetTypeAndTouchStates(blink::WebInputEvent::Type type,
-                                      double timestamp_sec,
-                                      blink::WebTouchEvent* event);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_COMMON_INPUT_WEB_TOUCH_EVENT_TRAITS_H_