blob: c4262178fda2575e359635c145d5e601f2a25922 (
plain)
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
|
// 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.
#ifndef CONTENT_PUBLIC_BROWSER_OVERSCROLL_CONFIGURATION_H_
#define CONTENT_PUBLIC_BROWSER_OVERSCROLL_CONFIGURATION_H_
#include "base/macros.h"
#include "base/time/time.h"
#include "content/common/content_export.h"
namespace content {
class CONTENT_EXPORT OverscrollConfig {
public:
// Determines pull-to-refresh mode according to --pull-to-refresh flag.
enum class PullToRefreshMode {
// Pull-to-refresh is disabled.
kDisabled,
// Pull-to-refresh is enabled for both touchscreen and touchpad.
kEnabled,
// Pull-to-refresh is enabled only for touchscreen.
kEnabledTouchschreen,
};
// These are percentages of the display size.
static const float kCompleteTouchpadThresholdPercent;
static const float kCompleteTouchscreenThresholdPercent;
static const float kStartTouchpadThresholdDips;
static const float kStartTouchscreenThresholdDips;
static PullToRefreshMode GetPullToRefreshMode();
static bool TouchpadOverscrollHistoryNavigationEnabled();
static base::TimeDelta MaxInertialEventsBeforeOverscrollCancellation();
private:
friend class ScopedPullToRefreshMode;
friend class OverscrollControllerTest;
// Helper functions used by |ScopedPullToRefreshMode| to set and reset mode in
// tests.
static void SetPullToRefreshMode(PullToRefreshMode mode);
static void ResetPullToRefreshMode();
// Helper functions to reset TouchpadOverscrollHistoryNavigationEnabled in
// tests.
static void ResetTouchpadOverscrollHistoryNavigationEnabled();
DISALLOW_IMPLICIT_CONSTRUCTORS(OverscrollConfig);
};
} // namespace content
#endif // CONTENT_PUBLIC_BROWSER_OVERSCROLL_CONFIGURATION_H_
|
