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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 "third_party/blink/public/platform/web_gesture_event.h"
namespace blink {
float WebGestureEvent::DeltaXInRootFrame() const {
if (type_ == WebInputEvent::kGestureScrollBegin)
return data.scroll_begin.delta_x_hint / frame_scale_;
DCHECK(type_ == WebInputEvent::kGestureScrollUpdate);
return data.scroll_update.delta_x / frame_scale_;
}
float WebGestureEvent::DeltaYInRootFrame() const {
if (type_ == WebInputEvent::kGestureScrollBegin)
return data.scroll_begin.delta_y_hint / frame_scale_;
DCHECK(type_ == WebInputEvent::kGestureScrollUpdate);
return data.scroll_update.delta_y / frame_scale_;
}
WebGestureEvent::ScrollUnits WebGestureEvent::DeltaUnits() const {
if (type_ == WebInputEvent::kGestureScrollBegin)
return data.scroll_begin.delta_hint_units;
if (type_ == WebInputEvent::kGestureScrollUpdate)
return data.scroll_update.delta_units;
DCHECK(type_ == WebInputEvent::kGestureScrollEnd);
return data.scroll_end.delta_units;
}
float WebGestureEvent::PinchScale() const {
DCHECK(type_ == WebInputEvent::kGesturePinchUpdate);
return data.pinch_update.scale;
}
WebGestureEvent::InertialPhaseState WebGestureEvent::InertialPhase() const {
if (type_ == WebInputEvent::kGestureScrollBegin)
return data.scroll_begin.inertial_phase;
if (type_ == WebInputEvent::kGestureScrollUpdate)
return data.scroll_update.inertial_phase;
DCHECK(type_ == WebInputEvent::kGestureScrollEnd);
return data.scroll_end.inertial_phase;
}
bool WebGestureEvent::Synthetic() const {
if (type_ == WebInputEvent::kGestureScrollBegin)
return data.scroll_begin.synthetic;
DCHECK(type_ == WebInputEvent::kGestureScrollEnd);
return data.scroll_end.synthetic;
}
float WebGestureEvent::VelocityX() const {
if (type_ == WebInputEvent::kGestureScrollUpdate)
return data.scroll_update.velocity_x;
DCHECK(type_ == WebInputEvent::kGestureFlingStart);
return data.fling_start.velocity_x;
}
float WebGestureEvent::VelocityY() const {
if (type_ == WebInputEvent::kGestureScrollUpdate)
return data.scroll_update.velocity_y;
DCHECK(type_ == WebInputEvent::kGestureFlingStart);
return data.fling_start.velocity_y;
}
WebFloatSize WebGestureEvent::TapAreaInRootFrame() const {
if (type_ == WebInputEvent::kGestureTwoFingerTap) {
return WebFloatSize(data.two_finger_tap.first_finger_width / frame_scale_,
data.two_finger_tap.first_finger_height / frame_scale_);
} else if (type_ == WebInputEvent::kGestureLongPress ||
type_ == WebInputEvent::kGestureLongTap) {
return WebFloatSize(data.long_press.width / frame_scale_,
data.long_press.height / frame_scale_);
} else if (type_ == WebInputEvent::kGestureTap ||
type_ == WebInputEvent::kGestureTapUnconfirmed) {
return WebFloatSize(data.tap.width / frame_scale_,
data.tap.height / frame_scale_);
} else if (type_ == WebInputEvent::kGestureTapDown) {
return WebFloatSize(data.tap_down.width / frame_scale_,
data.tap_down.height / frame_scale_);
} else if (type_ == WebInputEvent::kGestureShowPress) {
return WebFloatSize(data.show_press.width / frame_scale_,
data.show_press.height / frame_scale_);
}
// 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(
(position_in_widget_.x / frame_scale_) + frame_translate_.x,
(position_in_widget_.y / frame_scale_) + frame_translate_.y);
}
int WebGestureEvent::TapCount() const {
DCHECK(type_ == WebInputEvent::kGestureTap);
return data.tap.tap_count;
}
void WebGestureEvent::ApplyTouchAdjustment(WebFloatPoint root_frame_coords) {
// 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.
frame_translate_.x =
root_frame_coords.x - (position_in_widget_.x / frame_scale_);
frame_translate_.y =
root_frame_coords.y - (position_in_widget_.y / frame_scale_);
}
void WebGestureEvent::FlattenTransform() {
if (frame_scale_ != 1) {
switch (type_) {
case WebInputEvent::kGestureScrollBegin:
data.scroll_begin.delta_x_hint /= frame_scale_;
data.scroll_begin.delta_y_hint /= frame_scale_;
break;
case WebInputEvent::kGestureScrollUpdate:
data.scroll_update.delta_x /= frame_scale_;
data.scroll_update.delta_y /= frame_scale_;
break;
case WebInputEvent::kGestureTwoFingerTap:
data.two_finger_tap.first_finger_width /= frame_scale_;
data.two_finger_tap.first_finger_height /= frame_scale_;
break;
case WebInputEvent::kGestureLongPress:
case WebInputEvent::kGestureLongTap:
data.long_press.width /= frame_scale_;
data.long_press.height /= frame_scale_;
break;
case WebInputEvent::kGestureTap:
case WebInputEvent::kGestureTapUnconfirmed:
data.tap.width /= frame_scale_;
data.tap.height /= frame_scale_;
break;
case WebInputEvent::kGestureTapDown:
data.tap_down.width /= frame_scale_;
data.tap_down.height /= frame_scale_;
break;
case WebInputEvent::kGestureShowPress:
data.show_press.width /= frame_scale_;
data.show_press.height /= frame_scale_;
break;
default:
break;
}
}
SetPositionInWidget(PositionInRootFrame());
frame_translate_.x = 0;
frame_translate_.y = 0;
frame_scale_ = 1;
}
} // namespace blink
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