1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
// 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.
#ifndef COMPONENTS_INPUT_TOUCH_TIMEOUT_HANDLER_H_
#define COMPONENTS_INPUT_TOUCH_TIMEOUT_HANDLER_H_
#include <stddef.h>
#include <stdint.h>
#include "base/memory/raw_ptr.h"
#include "base/time/time.h"
#include "components/input/event_with_latency_info.h"
#include "components/input/timeout_monitor.h"
#include "third_party/blink/public/mojom/input/input_event_result.mojom-shared.h"
namespace input {
class PassthroughTouchEventQueue;
class TouchTimeoutHandler {
public:
TouchTimeoutHandler(PassthroughTouchEventQueue* touch_queue,
base::TimeDelta desktop_timeout_delay,
base::TimeDelta mobile_timeout_delay,
scoped_refptr<base::SequencedTaskRunner> task_runner);
~TouchTimeoutHandler();
void StartIfNecessary(const TouchEventWithLatencyInfo& event);
bool ConfirmTouchEvent(uint32_t unique_touch_event_id,
blink::mojom::InputEventResultState ack_result,
bool should_stop_timeout_monitor);
bool FilterEvent(const blink::WebTouchEvent& event);
void SetEnabled(bool enabled);
void SetUseMobileTimeout(bool use_mobile_timeout);
void StopTimeoutMonitor();
bool IsTimeoutTimerRunning() const { return timeout_monitor_.IsRunning(); }
bool IsEnabled() const { return enabled_ && !GetTimeoutDelay().is_zero(); }
private:
enum PendingAckState {
PENDING_ACK_NONE,
PENDING_ACK_ORIGINAL_EVENT,
PENDING_ACK_CANCEL_EVENT,
};
void OnTimeOut();
// Skip a cancel event if the timed-out event had no consumer and was the
// initial event in the gesture.
bool AckedTimeoutEventRequiresCancel(
blink::mojom::InputEventResultState ack_result) const;
void SetPendingAckState(PendingAckState new_pending_ack_state);
void LogSequenceStartForUMA();
void LogSequenceEndForUMAIfNecessary(bool timed_out);
base::TimeDelta GetTimeoutDelay() const;
bool HasTimeoutEvent() const;
raw_ptr<PassthroughTouchEventQueue> touch_queue_;
// How long to wait on a touch ack before cancelling the touch sequence.
const base::TimeDelta desktop_timeout_delay_;
const base::TimeDelta mobile_timeout_delay_;
bool use_mobile_timeout_;
// The touch event source for which we expect the next ack.
PendingAckState pending_ack_state_;
// The event for which the ack timeout is triggered.
TouchEventWithLatencyInfo timeout_event_;
// Provides timeout-based callback behavior.
TimeoutMonitor timeout_monitor_;
bool enabled_;
bool enabled_for_current_sequence_;
// Bookkeeping to classify and log whether a touch sequence times out.
bool sequence_awaiting_uma_update_;
bool sequence_using_mobile_timeout_;
};
} // namespace input
#endif // COMPONENTS_INPUT_TOUCH_TIMEOUT_HANDLER_H_
|
