forked from mirrors/gecko-dev
124 lines
3.9 KiB
C++
124 lines
3.9 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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#include "ScrollingMetrics.h"
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#include "mozilla/dom/ContentParent.h"
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#include "mozilla/StaticPrefs_browser.h"
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namespace mozilla {
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static TimeStamp gScrollingStartTime;
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static TimeStamp gScrollingEndTime;
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static uint32_t gScrollDistanceCSSPixels = 0;
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static dom::InteractionData gScrollingInteraction = {};
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void ScrollingMetrics::OnScrollingInteractionEnded() {
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// We are only interested in content process scrolling
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if (XRE_IsParentProcess()) {
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return;
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}
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if (!gScrollingStartTime.IsNull() && !gScrollingEndTime.IsNull()) {
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gScrollingInteraction.mInteractionCount++;
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gScrollingInteraction.mInteractionTimeInMilliseconds +=
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static_cast<uint32_t>(
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(gScrollingEndTime - gScrollingStartTime).ToMilliseconds());
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gScrollingInteraction.mScrollingDistanceInPixels +=
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gScrollDistanceCSSPixels;
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}
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gScrollDistanceCSSPixels = 0;
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gScrollingStartTime = TimeStamp();
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gScrollingEndTime = TimeStamp();
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}
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void ScrollingMetrics::OnScrollingInteraction(CSSCoord distanceScrolled) {
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// We are only interested in content process scrolling
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if (XRE_IsParentProcess()) {
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return;
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}
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TimeStamp now = TimeStamp::Now();
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if (gScrollingEndTime.IsNull()) {
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gScrollingEndTime = now;
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}
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TimeDuration delay = now - gScrollingEndTime;
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// Has it been too long since the last scroll input event to consider it part
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// of the same interaction?
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if (delay >
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TimeDuration::FromMilliseconds(
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StaticPrefs::browser_places_interactions_scrolling_timeout_ms())) {
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OnScrollingInteractionEnded();
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}
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if (gScrollingStartTime.IsNull()) {
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gScrollingStartTime = now;
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}
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gScrollingEndTime = now;
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gScrollDistanceCSSPixels += static_cast<uint32_t>(distanceScrolled);
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}
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StaticAutoPtr<ScrollingMetrics> ScrollingMetrics::sSingleton;
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ScrollingMetrics* ScrollingMetrics::GetSingleton() {
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if (!sSingleton) {
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sSingleton = new ScrollingMetrics;
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}
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return sSingleton.get();
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}
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struct ScrollingMetricsCollector {
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void AppendScrollingMetrics(const std::tuple<uint32_t, uint32_t>& aMetrics,
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dom::ContentParent* aParent) {
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mTimeScrolledMS += std::get<0>(aMetrics);
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mDistanceScrolledPixels += std::get<1>(aMetrics);
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}
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~ScrollingMetricsCollector() {
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mPromiseHolder.Resolve(
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std::make_tuple(mTimeScrolledMS, mDistanceScrolledPixels), __func__);
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}
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uint32_t mTimeScrolledMS = 0;
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uint32_t mDistanceScrolledPixels = 0;
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MozPromiseHolder<ScrollingMetrics::ScrollingMetricsPromise> mPromiseHolder;
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};
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auto ScrollingMetrics::CollectScrollingMetricsInternal()
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-> RefPtr<ScrollingMetrics::ScrollingMetricsPromise> {
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std::shared_ptr<ScrollingMetricsCollector> collector =
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std::make_shared<ScrollingMetricsCollector>();
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nsTArray<dom::ContentParent*> contentParents;
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dom::ContentParent::GetAll(contentParents);
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for (dom::ContentParent* parent : contentParents) {
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RefPtr<dom::ContentParent> parentRef = parent;
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parent->SendCollectScrollingMetrics(
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[collector, parentRef](const std::tuple<uint32_t, uint32_t>& aMetrics) {
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collector->AppendScrollingMetrics(aMetrics, parentRef.get());
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},
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[](mozilla::ipc::ResponseRejectReason) {});
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}
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return collector->mPromiseHolder.Ensure(__func__);
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}
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std::tuple<uint32_t, uint32_t>
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ScrollingMetrics::CollectLocalScrollingMetricsInternal() {
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OnScrollingInteractionEnded();
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std::tuple<uint32_t, uint32_t> metrics =
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std::make_tuple(gScrollingInteraction.mInteractionTimeInMilliseconds,
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gScrollingInteraction.mScrollingDistanceInPixels);
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gScrollingInteraction = {};
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return metrics;
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}
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} // namespace mozilla
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