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// Copyright (c) 2012 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/browser/renderer_host/ui_events_helper.h"
#include <stdint.h>
#include "content/common/input/web_touch_event_traits.h"
#include "third_party/blink/public/platform/web_input_event.h"
#include "ui/events/base_event_utils.h"
#include "ui/events/blink/blink_event_util.h"
#include "ui/events/event.h"
#include "ui/events/event_constants.h"
namespace {
ui::EventType WebTouchPointStateToEventType(
blink::WebTouchPoint::State state) {
switch (state) {
case blink::WebTouchPoint::kStateReleased:
return ui::ET_TOUCH_RELEASED;
case blink::WebTouchPoint::kStatePressed:
return ui::ET_TOUCH_PRESSED;
case blink::WebTouchPoint::kStateMoved:
return ui::ET_TOUCH_MOVED;
case blink::WebTouchPoint::kStateCancelled:
return ui::ET_TOUCH_CANCELLED;
default:
return ui::ET_UNKNOWN;
}
}
} // namespace
namespace content {
bool MakeUITouchEventsFromWebTouchEvents(
const TouchEventWithLatencyInfo& touch_with_latency,
std::vector<std::unique_ptr<ui::TouchEvent>>* list,
TouchEventCoordinateSystem coordinate_system) {
const blink::WebTouchEvent& touch = touch_with_latency.event;
ui::EventType type = ui::ET_UNKNOWN;
switch (touch.GetType()) {
case blink::WebInputEvent::kTouchStart:
type = ui::ET_TOUCH_PRESSED;
break;
case blink::WebInputEvent::kTouchEnd:
type = ui::ET_TOUCH_RELEASED;
break;
case blink::WebInputEvent::kTouchMove:
type = ui::ET_TOUCH_MOVED;
break;
case blink::WebInputEvent::kTouchCancel:
type = ui::ET_TOUCH_CANCELLED;
break;
default:
NOTREACHED();
return false;
}
int flags = ui::WebEventModifiersToEventFlags(touch.GetModifiers());
base::TimeTicks timestamp = touch.TimeStamp();
for (unsigned i = 0; i < touch.touches_length; ++i) {
const blink::WebTouchPoint& point = touch.touches[i];
if (WebTouchPointStateToEventType(point.state) != type)
continue;
// ui events start in the co-ordinate space of the EventDispatcher.
gfx::PointF location;
if (coordinate_system == LOCAL_COORDINATES)
location = point.PositionInWidget();
else
location = point.PositionInScreen();
auto uievent = std::make_unique<ui::TouchEvent>(
type, gfx::Point(), timestamp,
ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, point.id,
point.radius_x, point.radius_y, point.force),
flags, point.rotation_angle);
uievent->set_location_f(location);
uievent->set_root_location_f(location);
uievent->set_latency(touch_with_latency.latency);
list->push_back(std::move(uievent));
}
return true;
}
bool InputEventAckStateIsSetNonBlocking(InputEventAckState ack_state) {
switch (ack_state) {
case INPUT_EVENT_ACK_STATE_SET_NON_BLOCKING:
case INPUT_EVENT_ACK_STATE_SET_NON_BLOCKING_DUE_TO_FLING:
return true;
default:
return false;
}
}
} // namespace content
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