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// Copyright 2017 The Chromium Authors
// 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/common/input/web_pointer_event.h"
#include "base/check_op.h"
#include "base/notreached.h"
namespace blink {
namespace {
WebInputEvent::Type PointerEventTypeForTouchPointState(
WebTouchPoint::State state) {
switch (state) {
case WebTouchPoint::State::kStateReleased:
return WebInputEvent::Type::kPointerUp;
case WebTouchPoint::State::kStateCancelled:
return WebInputEvent::Type::kPointerCancel;
case WebTouchPoint::State::kStatePressed:
return WebInputEvent::Type::kPointerDown;
case WebTouchPoint::State::kStateMoved:
return WebInputEvent::Type::kPointerMove;
case WebTouchPoint::State::kStateStationary:
default:
NOTREACHED();
}
}
} // namespace
WebPointerEvent::WebPointerEvent(const WebTouchEvent& touch_event,
const WebTouchPoint& touch_point)
: WebInputEvent(PointerEventTypeForTouchPointState(touch_point.state),
touch_event.GetModifiers(),
touch_event.TimeStamp()),
WebPointerProperties(touch_point),
hovering(touch_event.hovering),
width(touch_point.radius_x * 2.f),
height(touch_point.radius_y * 2.f) {
// WebInutEvent attributes
SetFrameScale(touch_event.FrameScale());
SetFrameTranslate(touch_event.FrameTranslate());
// WebTouchEvent attributes
dispatch_type = touch_event.dispatch_type;
moved_beyond_slop_region = touch_event.moved_beyond_slop_region;
touch_start_or_first_touch_move = touch_event.touch_start_or_first_touch_move;
unique_touch_event_id = touch_event.unique_touch_event_id;
// WebTouchPoint attributes
rotation_angle = touch_point.rotation_angle;
// TODO(crbug.com/816504): Touch point button is not set at this point yet.
button = (GetType() == WebInputEvent::Type::kPointerDown ||
GetType() == WebInputEvent::Type::kPointerUp)
? WebPointerProperties::Button::kLeft
: WebPointerProperties::Button::kNoButton;
if (touch_event.GetPreventCountingAsInteraction()) {
SetPreventCountingAsInteractionTrue();
}
}
WebPointerEvent::WebPointerEvent(WebInputEvent::Type type,
const WebMouseEvent& mouse_event)
: WebInputEvent(type, mouse_event.GetModifiers(), mouse_event.TimeStamp()),
WebPointerProperties(mouse_event),
hovering(true),
width(std::numeric_limits<float>::quiet_NaN()),
height(std::numeric_limits<float>::quiet_NaN()) {
DCHECK_GE(type, WebInputEvent::Type::kPointerTypeFirst);
DCHECK_LE(type, WebInputEvent::Type::kPointerTypeLast);
SetFrameScale(mouse_event.FrameScale());
SetFrameTranslate(mouse_event.FrameTranslate());
if (mouse_event.GetPreventCountingAsInteraction()) {
SetPreventCountingAsInteractionTrue();
}
}
std::unique_ptr<WebInputEvent> WebPointerEvent::Clone() const {
return std::make_unique<WebPointerEvent>(*this);
}
bool WebPointerEvent::CanCoalesce(const WebInputEvent& event) const {
if (!IsPointerEventType(event.GetType()))
return false;
const WebPointerEvent& pointer_event =
static_cast<const WebPointerEvent&>(event);
return (GetType() == WebInputEvent::Type::kPointerMove ||
GetType() == WebInputEvent::Type::kPointerRawUpdate) &&
GetType() == event.GetType() &&
GetModifiers() == event.GetModifiers() && id == pointer_event.id &&
pointer_type == pointer_event.pointer_type;
}
void WebPointerEvent::Coalesce(const WebInputEvent& event) {
DCHECK(CanCoalesce(event));
const WebPointerEvent& pointer_event =
static_cast<const WebPointerEvent&>(event);
// Accumulate movement deltas.
int x = movement_x;
int y = movement_y;
*this = pointer_event;
movement_x += x;
movement_y += y;
}
WebPointerEvent WebPointerEvent::CreatePointerCausesUaActionEvent(
WebPointerProperties::PointerType type,
base::TimeTicks time_stamp) {
WebPointerEvent event;
event.pointer_type = type;
event.SetTimeStamp(time_stamp);
event.SetType(WebInputEvent::Type::kPointerCausedUaAction);
return event;
}
WebPointerEvent WebPointerEvent::WebPointerEventInRootFrame() const {
WebPointerEvent transformed_event = *this;
if (HasWidth())
transformed_event.width /= frame_scale_;
if (HasHeight())
transformed_event.height /= frame_scale_;
transformed_event.position_in_widget_ =
gfx::ScalePoint(transformed_event.PositionInWidget(), 1 / frame_scale_) +
frame_translate_;
return transformed_event;
}
} // namespace blink
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