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// Copyright 2013 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 CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_SMOOTH_MOVE_GESTURE_H_
#define CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_SMOOTH_MOVE_GESTURE_H_
#include <vector>
#include "base/macros.h"
#include "base/time/time.h"
#include "content/browser/renderer_host/input/synthetic_gesture.h"
#include "content/browser/renderer_host/input/synthetic_gesture_target.h"
#include "content/browser/renderer_host/input/synthetic_pointer_driver.h"
#include "content/common/content_export.h"
#include "content/common/input/synthetic_smooth_drag_gesture_params.h"
#include "content/common/input/synthetic_smooth_scroll_gesture_params.h"
#include "third_party/blink/public/platform/web_input_event.h"
#include "ui/gfx/geometry/vector2d.h"
#include "ui/gfx/geometry/vector2d_f.h"
namespace content {
class CONTENT_EXPORT SyntheticSmoothMoveGestureParams {
public:
SyntheticSmoothMoveGestureParams();
SyntheticSmoothMoveGestureParams(
const SyntheticSmoothMoveGestureParams& other);
~SyntheticSmoothMoveGestureParams();
enum InputType { MOUSE_DRAG_INPUT, MOUSE_WHEEL_INPUT, TOUCH_INPUT };
InputType input_type;
gfx::PointF start_point;
std::vector<gfx::Vector2dF> distances;
int speed_in_pixels_s;
int fling_velocity_x;
int fling_velocity_y;
bool prevent_fling;
bool add_slop;
bool precise_scrolling_deltas;
bool scroll_by_page;
};
// This class is used as helper class for simulation of scroll and drag.
// Simulates scrolling/dragging given a sequence of distances as a continuous
// gestures (i.e. when synthesizing touch or mouse drag events, the pointer is
// not lifted when changing scroll direction).
// If no distance is provided or the first one is 0, no touch events are
// generated.
// When synthesizing touch events for scrolling, the first distance is extended
// to compensate for the touch slop.
class CONTENT_EXPORT SyntheticSmoothMoveGesture : public SyntheticGesture {
public:
explicit SyntheticSmoothMoveGesture(SyntheticSmoothMoveGestureParams params);
~SyntheticSmoothMoveGesture() override;
// SyntheticGesture implementation:
SyntheticGesture::Result ForwardInputEvents(
const base::TimeTicks& timestamp,
SyntheticGestureTarget* target) override;
private:
enum GestureState {
SETUP,
STARTED,
MOVING,
STOPPING,
DONE
};
void ForwardTouchInputEvents(
const base::TimeTicks& timestamp, SyntheticGestureTarget* target);
void ForwardMouseWheelInputEvents(
const base::TimeTicks& timestamp, SyntheticGestureTarget* target);
void ForwardMouseClickInputEvents(
const base::TimeTicks& timestamp, SyntheticGestureTarget* target);
void ForwardMouseWheelEvent(SyntheticGestureTarget* target,
const gfx::Vector2dF& delta,
const blink::WebMouseWheelEvent::Phase phase,
const base::TimeTicks& timestamp) const;
void ForwardFlingGestureEvent(SyntheticGestureTarget* target,
const blink::WebInputEvent::Type type) const;
void PressPoint(SyntheticGestureTarget* target,
const base::TimeTicks& timestamp);
void MovePoint(SyntheticGestureTarget* target,
const gfx::Vector2dF& delta,
const base::TimeTicks& timestamp);
void ReleasePoint(SyntheticGestureTarget* target,
const base::TimeTicks& timestamp);
void AddTouchSlopToFirstDistance(SyntheticGestureTarget* target);
gfx::Vector2dF GetPositionDeltaAtTime(const base::TimeTicks& timestamp) const;
void ComputeNextMoveSegment();
base::TimeTicks ClampTimestamp(const base::TimeTicks& timestamp) const;
bool FinishedCurrentMoveSegment(const base::TimeTicks& timestamp) const;
bool IsLastMoveSegment() const;
bool MoveIsNoOp() const;
SyntheticSmoothMoveGestureParams params_;
std::unique_ptr<SyntheticPointerDriver> synthetic_pointer_driver_;
// Used for mouse input.
gfx::Vector2dF current_move_segment_total_delta_;
// Used for touch input.
gfx::PointF current_move_segment_start_position_;
GestureState state_;
int current_move_segment_;
base::TimeTicks current_move_segment_start_time_;
base::TimeTicks current_move_segment_stop_time_;
// Used to set phase information for synthetic wheel events.
bool needs_scroll_begin_;
DISALLOW_COPY_AND_ASSIGN(SyntheticSmoothMoveGesture);
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_SMOOTH_MOVE_GESTURE_H_
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