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// Copyright 2016 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/WebGestureEvent.h"
namespace blink {
float WebGestureEvent::deltaXInRootFrame() const {
if (m_type == WebInputEvent::GestureScrollBegin)
return data.scrollBegin.deltaXHint / m_frameScale;
DCHECK(m_type == WebInputEvent::GestureScrollUpdate);
return data.scrollUpdate.deltaX / m_frameScale;
}
float WebGestureEvent::deltaYInRootFrame() const {
if (m_type == WebInputEvent::GestureScrollBegin)
return data.scrollBegin.deltaYHint / m_frameScale;
DCHECK(m_type == WebInputEvent::GestureScrollUpdate);
return data.scrollUpdate.deltaY / m_frameScale;
}
WebGestureEvent::ScrollUnits WebGestureEvent::deltaUnits() const {
if (m_type == WebInputEvent::GestureScrollBegin)
return data.scrollBegin.deltaHintUnits;
if (m_type == WebInputEvent::GestureScrollUpdate)
return data.scrollUpdate.deltaUnits;
DCHECK(m_type == WebInputEvent::GestureScrollEnd);
return data.scrollEnd.deltaUnits;
}
float WebGestureEvent::pinchScale() const {
DCHECK(m_type == WebInputEvent::GesturePinchUpdate);
return data.pinchUpdate.scale;
}
WebGestureEvent::InertialPhaseState WebGestureEvent::inertialPhase() const {
if (m_type == WebInputEvent::GestureScrollBegin)
return data.scrollBegin.inertialPhase;
if (m_type == WebInputEvent::GestureScrollUpdate)
return data.scrollUpdate.inertialPhase;
DCHECK(m_type == WebInputEvent::GestureScrollEnd);
return data.scrollEnd.inertialPhase;
}
bool WebGestureEvent::synthetic() const {
if (m_type == WebInputEvent::GestureScrollBegin)
return data.scrollBegin.synthetic;
DCHECK(m_type == WebInputEvent::GestureScrollEnd);
return data.scrollEnd.synthetic;
}
float WebGestureEvent::velocityX() const {
if (m_type == WebInputEvent::GestureScrollUpdate)
return data.scrollUpdate.velocityX;
DCHECK(m_type == WebInputEvent::GestureFlingStart);
return data.flingStart.velocityX;
}
float WebGestureEvent::velocityY() const {
if (m_type == WebInputEvent::GestureScrollUpdate)
return data.scrollUpdate.velocityY;
DCHECK(m_type == WebInputEvent::GestureFlingStart);
return data.flingStart.velocityY;
}
WebFloatSize WebGestureEvent::tapAreaInRootFrame() const {
if (m_type == WebInputEvent::GestureTwoFingerTap) {
return WebFloatSize(data.twoFingerTap.firstFingerWidth / m_frameScale,
data.twoFingerTap.firstFingerHeight / m_frameScale);
} else if (m_type == WebInputEvent::GestureLongPress ||
m_type == WebInputEvent::GestureLongTap) {
return WebFloatSize(data.longPress.width / m_frameScale,
data.longPress.height / m_frameScale);
} else if (m_type == WebInputEvent::GestureTap ||
m_type == WebInputEvent::GestureTapUnconfirmed) {
return WebFloatSize(data.tap.width / m_frameScale,
data.tap.height / m_frameScale);
} else if (m_type == WebInputEvent::GestureTapDown) {
return WebFloatSize(data.tapDown.width / m_frameScale,
data.tapDown.height / m_frameScale);
} else if (m_type == WebInputEvent::GestureShowPress) {
return WebFloatSize(data.showPress.width / m_frameScale,
data.showPress.height / m_frameScale);
}
// This function is called for all gestures and determined if the tap
// area is empty or not; so return an empty rect here.
return WebFloatSize();
}
WebFloatPoint WebGestureEvent::positionInRootFrame() const {
return WebFloatPoint((x / m_frameScale) + m_frameTranslate.x,
(y / m_frameScale) + m_frameTranslate.y);
}
int WebGestureEvent::tapCount() const {
DCHECK(m_type == WebInputEvent::GestureTap);
return data.tap.tapCount;
}
void WebGestureEvent::applyTouchAdjustment(WebFloatPoint rootFrameCoords) {
// Update the window-relative position of the event so that the node that
// was ultimately hit is under this point (i.e. elementFromPoint for the
// client co-ordinates in a 'click' event should yield the target). The
// global position is intentionally left unmodified because it's intended to
// reflect raw co-ordinates unrelated to any content.
m_frameTranslate.x = rootFrameCoords.x - (x / m_frameScale);
m_frameTranslate.y = rootFrameCoords.y - (y / m_frameScale);
}
void WebGestureEvent::flattenTransform() {
if (m_frameScale != 1) {
switch (m_type) {
case WebInputEvent::GestureScrollBegin:
data.scrollBegin.deltaXHint /= m_frameScale;
data.scrollBegin.deltaYHint /= m_frameScale;
break;
case WebInputEvent::GestureScrollUpdate:
data.scrollUpdate.deltaX /= m_frameScale;
data.scrollUpdate.deltaY /= m_frameScale;
break;
case WebInputEvent::GestureTwoFingerTap:
data.twoFingerTap.firstFingerWidth /= m_frameScale;
data.twoFingerTap.firstFingerHeight /= m_frameScale;
break;
case WebInputEvent::GestureLongPress:
case WebInputEvent::GestureLongTap:
data.longPress.width /= m_frameScale;
data.longPress.height /= m_frameScale;
break;
case WebInputEvent::GestureTap:
case WebInputEvent::GestureTapUnconfirmed:
data.tap.width /= m_frameScale;
data.tap.height /= m_frameScale;
break;
case WebInputEvent::GestureTapDown:
data.tapDown.width /= m_frameScale;
data.tapDown.height /= m_frameScale;
break;
case WebInputEvent::GestureShowPress:
data.showPress.width /= m_frameScale;
data.showPress.height /= m_frameScale;
break;
default:
break;
}
}
x = (x / m_frameScale) + m_frameTranslate.x;
y = (y / m_frameScale) + m_frameTranslate.y;
m_frameTranslate.x = 0;
m_frameTranslate.y = 0;
m_frameScale = 1;
}
} // namespace blink
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