| // 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. |
| |
| #include "content/common/input/web_touch_event_traits.h" |
| |
| #include "base/logging.h" |
| |
| using blink::WebInputEvent; |
| using blink::WebTouchEvent; |
| using blink::WebTouchPoint; |
| |
| namespace content { |
| |
| bool WebTouchEventTraits::AllTouchPointsHaveState( |
| const WebTouchEvent& event, |
| blink::WebTouchPoint::State state) { |
| if (!event.touchesLength) |
| return false; |
| for (size_t i = 0; i < event.touchesLength; ++i) { |
| if (event.touches[i].state != state) |
| return false; |
| } |
| return true; |
| } |
| |
| bool WebTouchEventTraits::IsTouchSequenceStart(const WebTouchEvent& event) { |
| DCHECK(event.touchesLength); |
| if (event.type != WebInputEvent::TouchStart) |
| return false; |
| return AllTouchPointsHaveState(event, blink::WebTouchPoint::StatePressed); |
| } |
| |
| void WebTouchEventTraits::ResetType(WebInputEvent::Type type, |
| double timestamp_sec, |
| WebTouchEvent* event) { |
| DCHECK(WebInputEvent::isTouchEventType(type)); |
| event->type = type; |
| event->cancelable = (type != WebInputEvent::TouchCancel); |
| event->timeStampSeconds = timestamp_sec; |
| } |
| |
| void WebTouchEventTraits::ResetTypeAndTouchStates(WebInputEvent::Type type, |
| double timestamp_sec, |
| WebTouchEvent* event) { |
| ResetType(type, timestamp_sec, event); |
| |
| WebTouchPoint::State newState = WebTouchPoint::StateUndefined; |
| switch (event->type) { |
| case WebInputEvent::TouchStart: |
| newState = WebTouchPoint::StatePressed; |
| break; |
| case WebInputEvent::TouchMove: |
| newState = WebTouchPoint::StateMoved; |
| break; |
| case WebInputEvent::TouchEnd: |
| newState = WebTouchPoint::StateReleased; |
| break; |
| case WebInputEvent::TouchCancel: |
| newState = WebTouchPoint::StateCancelled; |
| break; |
| default: |
| NOTREACHED(); |
| break; |
| } |
| for (size_t i = 0; i < event->touchesLength; ++i) |
| event->touches[i].state = newState; |
| } |
| |
| } // namespace content |