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52 lines
1.7 KiB
C++
52 lines
1.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_ScrollingMetrics_h
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#define mozilla_dom_ScrollingMetrics_h
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#include "Units.h"
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#include "mozilla/MozPromise.h"
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#include "mozilla/RefPtr.h"
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#include "mozilla/StaticPtr.h"
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namespace mozilla {
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/**
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* ScrollingMetrics records user-intiated scrolling interactions. These are
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* aggregrated along with other user interactions (e.g. typing, view time), in
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* the history metadata.
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*/
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class ScrollingMetrics {
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public:
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using ScrollingMetricsPromise =
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MozPromise<std::tuple<uint32_t, uint32_t>, bool, true>;
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static RefPtr<ScrollingMetricsPromise> CollectScrollingMetrics() {
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return GetSingleton()->CollectScrollingMetricsInternal();
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}
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// Return the tuple of <scrollingTimeInMilliseconds,
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// ScrollingDistanceInPixels>
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static std::tuple<uint32_t, uint32_t> CollectLocalScrollingMetrics() {
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return GetSingleton()->CollectLocalScrollingMetricsInternal();
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}
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// Report a new user-initiated scrolling interaction
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static void OnScrollingInteraction(CSSCoord distanceScrolled);
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static void OnScrollingInteractionEnded();
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private:
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static ScrollingMetrics* GetSingleton();
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static StaticAutoPtr<ScrollingMetrics> sSingleton;
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RefPtr<ScrollingMetricsPromise> CollectScrollingMetricsInternal();
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std::tuple<uint32_t, uint32_t> CollectLocalScrollingMetricsInternal();
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};
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} // namespace mozilla
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#endif /* mozilla_dom_ScrollingMetrics_h */
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