From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- gfx/layers/apz/util/ScrollLinkedEffectDetector.cpp | 48 ++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 gfx/layers/apz/util/ScrollLinkedEffectDetector.cpp (limited to 'gfx/layers/apz/util/ScrollLinkedEffectDetector.cpp') diff --git a/gfx/layers/apz/util/ScrollLinkedEffectDetector.cpp b/gfx/layers/apz/util/ScrollLinkedEffectDetector.cpp new file mode 100644 index 0000000000..eb456fa243 --- /dev/null +++ b/gfx/layers/apz/util/ScrollLinkedEffectDetector.cpp @@ -0,0 +1,48 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "ScrollLinkedEffectDetector.h" + +#include "mozilla/dom/Document.h" +#include "nsThreadUtils.h" + +namespace mozilla { +namespace layers { + +uint32_t ScrollLinkedEffectDetector::sDepth = 0; +bool ScrollLinkedEffectDetector::sFoundScrollLinkedEffect = false; + +/* static */ +void ScrollLinkedEffectDetector::PositioningPropertyMutated() { + MOZ_ASSERT(NS_IsMainThread()); + + if (sDepth > 0) { + // We are inside a scroll event dispatch + sFoundScrollLinkedEffect = true; + } +} + +ScrollLinkedEffectDetector::ScrollLinkedEffectDetector( + dom::Document* aDoc, const TimeStamp& aTimeStamp) + : mDocument(aDoc), mTimeStamp(aTimeStamp) { + MOZ_ASSERT(NS_IsMainThread()); + sDepth++; +} + +ScrollLinkedEffectDetector::~ScrollLinkedEffectDetector() { + sDepth--; + if (sDepth == 0) { + // We have exited all (possibly-nested) scroll event dispatches, + // record whether or not we found an effect, and reset state + if (sFoundScrollLinkedEffect) { + mDocument->ReportHasScrollLinkedEffect(mTimeStamp); + sFoundScrollLinkedEffect = false; + } + } +} + +} // namespace layers +} // namespace mozilla -- cgit v1.2.3