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content / public / browser / overscroll_configuration.h [blame]
// Copyright 2012 The Chromium Authors
// 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/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;
OverscrollConfig() = delete;
OverscrollConfig(const OverscrollConfig&) = delete;
OverscrollConfig& operator=(const OverscrollConfig&) = delete;
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();
};
} // namespace content
#endif // CONTENT_PUBLIC_BROWSER_OVERSCROLL_CONFIGURATION_H_