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// 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"
#include "third_party/blink/public/platform/web_touch_event.h"
using blink::WebInputEvent;
using blink::WebTouchEvent;
using blink::WebTouchPoint;
namespace content {
bool WebTouchEventTraits::AllTouchPointsHaveState(
const WebTouchEvent& event,
blink::WebTouchPoint::State state) {
if (!event.touches_length)
return false;
for (size_t i = 0; i < event.touches_length; ++i) {
if (event.touches[i].state != state)
return false;
}
return true;
}
bool WebTouchEventTraits::IsTouchSequenceStart(const WebTouchEvent& event) {
DCHECK(event.touches_length ||
event.GetType() == WebInputEvent::kTouchScrollStarted);
if (event.GetType() != WebInputEvent::kTouchStart)
return false;
return AllTouchPointsHaveState(event, blink::WebTouchPoint::kStatePressed);
}
bool WebTouchEventTraits::IsTouchSequenceEnd(const WebTouchEvent& event) {
if (event.GetType() != WebInputEvent::kTouchEnd &&
event.GetType() != WebInputEvent::kTouchCancel)
return false;
if (!event.touches_length)
return true;
for (size_t i = 0; i < event.touches_length; ++i) {
if (event.touches[i].state != blink::WebTouchPoint::kStateReleased &&
event.touches[i].state != blink::WebTouchPoint::kStateCancelled)
return false;
}
return true;
}
void WebTouchEventTraits::ResetType(WebInputEvent::Type type,
base::TimeTicks timestamp,
WebTouchEvent* event) {
DCHECK(WebInputEvent::IsTouchEventType(type));
DCHECK(type != WebInputEvent::kTouchScrollStarted);
event->SetType(type);
event->dispatch_type = type == WebInputEvent::kTouchCancel
? WebInputEvent::kEventNonBlocking
: WebInputEvent::kBlocking;
event->SetTimeStamp(timestamp);
}
void WebTouchEventTraits::ResetTypeAndTouchStates(WebInputEvent::Type type,
base::TimeTicks timestamp,
WebTouchEvent* event) {
ResetType(type, timestamp, event);
WebTouchPoint::State newState = WebTouchPoint::kStateUndefined;
switch (event->GetType()) {
case WebInputEvent::kTouchStart:
newState = WebTouchPoint::kStatePressed;
break;
case WebInputEvent::kTouchMove:
newState = WebTouchPoint::kStateMoved;
break;
case WebInputEvent::kTouchEnd:
newState = WebTouchPoint::kStateReleased;
break;
case WebInputEvent::kTouchCancel:
newState = WebTouchPoint::kStateCancelled;
break;
default:
NOTREACHED();
break;
}
for (size_t i = 0; i < event->touches_length; ++i)
event->touches[i].state = newState;
}
} // namespace content
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