| // Copyright 2017 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 "public/platform/WebTouchEvent.h" |
| |
| namespace blink { |
| |
| WebTouchEvent WebTouchEvent::flattenTransform() const { |
| WebTouchEvent transformedEvent = *this; |
| for (unsigned i = 0; i < touchesLength; ++i) { |
| transformedEvent.touches[i] = touchPointInRootFrame(i); |
| } |
| transformedEvent.m_frameTranslate.x = 0; |
| transformedEvent.m_frameTranslate.y = 0; |
| transformedEvent.m_frameScale = 1; |
| |
| return transformedEvent; |
| } |
| |
| WebTouchPoint WebTouchEvent::touchPointInRootFrame(unsigned point) const { |
| DCHECK_LT(point, touchesLength); |
| if (point >= touchesLength) |
| return WebTouchPoint(); |
| |
| WebTouchPoint transformedPoint = touches[point]; |
| transformedPoint.radiusX /= m_frameScale; |
| transformedPoint.radiusY /= m_frameScale; |
| transformedPoint.movementX /= m_frameScale; |
| transformedPoint.movementY /= m_frameScale; |
| transformedPoint.position.x = |
| (transformedPoint.position.x / m_frameScale) + m_frameTranslate.x; |
| transformedPoint.position.y = |
| (transformedPoint.position.y / m_frameScale) + m_frameTranslate.y; |
| return transformedPoint; |
| } |
| |
| } // namespace blink |
