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// Copyright 2015 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.
#ifndef UI_EVENTS_BLINK_BLINK_EVENT_UTIL_H_
#define UI_EVENTS_BLINK_BLINK_EVENT_UTIL_H_
#include <memory>
#include "third_party/WebKit/public/platform/WebGestureEvent.h"
#include "third_party/WebKit/public/platform/WebInputEvent.h"
#include "third_party/WebKit/public/platform/WebTouchEvent.h"
#include "ui/events/gesture_detection/motion_event.h"
namespace gfx {
class PointF;
class Vector2d;
}
namespace ui {
enum class DomCode;
struct GestureEventData;
struct GestureEventDetails;
class MotionEvent;
bool CanCoalesce(const blink::WebInputEvent& event_to_coalesce,
const blink::WebInputEvent& event);
void Coalesce(const blink::WebInputEvent& event_to_coalesce,
blink::WebInputEvent* event);
bool IsCompatibleScrollorPinch(const blink::WebGestureEvent& new_event,
const blink::WebGestureEvent& event_in_queue);
// Coalesces 3 GestureScroll/PinchUpdate into 2 events.
// Returns <GestureScrollUpdate, GesturePinchUpdate>.
std::pair<blink::WebGestureEvent, blink::WebGestureEvent>
CoalesceScrollAndPinch(const blink::WebGestureEvent* second_last_event,
const blink::WebGestureEvent& last_event,
const blink::WebGestureEvent& new_event);
blink::WebTouchEvent CreateWebTouchEventFromMotionEvent(
const MotionEvent& event,
bool may_cause_scrolling);
blink::WebGestureEvent CreateWebGestureEvent(const GestureEventDetails& details,
base::TimeTicks timestamp,
const gfx::PointF& location,
const gfx::PointF& raw_location,
int flags,
uint32_t unique_touch_event_id);
// Convenience wrapper for |CreateWebGestureEvent| using the supplied |data|.
blink::WebGestureEvent CreateWebGestureEventFromGestureEventData(
const GestureEventData& data);
int EventFlagsToWebEventModifiers(int flags);
std::unique_ptr<blink::WebInputEvent> ScaleWebInputEvent(
const blink::WebInputEvent& event,
float scale);
// Transforms coordinates and other properties of |event|, by
// 1) translating / shifting by |delta| and
// 2) scaling by |scale|.
// If |event| does not need to change, returns nullptr.
// Otherwise, returns the transformed version of |event|.
std::unique_ptr<blink::WebInputEvent> TranslateAndScaleWebInputEvent(
const blink::WebInputEvent& event,
const gfx::Vector2d& delta,
float scale);
blink::WebInputEvent::Type ToWebMouseEventType(MotionEvent::Action action);
void SetWebPointerPropertiesFromMotionEventData(
blink::WebPointerProperties& webPointerProperties,
int pointer_id,
float pressure,
float orientation_rad,
float tilt_rad,
int android_buttons_changed,
int tool_type);
int WebEventModifiersToEventFlags(int modifiers);
blink::WebInputEvent::Modifiers DomCodeToWebInputEventModifiers(
ui::DomCode code);
bool IsGestureScrollOrFlingOrPinch(blink::WebInputEvent::Type);
bool IsContinuousGestureEvent(blink::WebInputEvent::Type);
inline const blink::WebGestureEvent& ToWebGestureEvent(
const blink::WebInputEvent& event) {
DCHECK(blink::WebInputEvent::IsGestureEventType(event.GetType()));
return static_cast<const blink::WebGestureEvent&>(event);
}
} // namespace ui
#endif // UI_EVENTS_BLINK_BLINK_EVENT_UTIL_H_