Framelet Prototype 2016

content/common/input/web_touch_event_traits.cc

-// 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 <stddef.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);
-}
-
-bool WebTouchEventTraits::IsTouchSequenceEnd(const WebTouchEvent& event) {
-  if (event.type != WebInputEvent::TouchEnd &&
-      event.type != WebInputEvent::TouchCancel)
-    return false;
-  if (!event.touchesLength)
-    return true;
-  for (size_t i = 0; i < event.touchesLength; ++i) {
-    if (event.touches[i].state != blink::WebTouchPoint::StateReleased &&
-        event.touches[i].state != blink::WebTouchPoint::StateCancelled)
-      return false;
-  }
-  return true;
-}
-
-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