forked from mirrors/gecko-dev
562a98e9cc
The reason why the global ScrollGeneration::sCounter doesn't work for the APZ case is the APZ sampler thread is per our top level browser window, so if there are multiple browser windows at the same time, the sCounter will be muted from different sampler threads. Differential Revision: https://phabricator.services.mozilla.com/D133439
136 lines
4.6 KiB
C++
136 lines
4.6 KiB
C++
/* 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 "ScrollPositionUpdate.h"
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#include <ostream>
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#include "mozilla/Assertions.h"
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namespace mozilla {
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static ScrollGenerationCounter sGenerationCounter;
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ScrollPositionUpdate::ScrollPositionUpdate()
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: mType(ScrollUpdateType::Absolute),
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mScrollMode(ScrollMode::Normal),
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mScrollOrigin(ScrollOrigin::None),
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mTriggeredByScript(ScrollTriggeredByScript::No) {}
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/*static*/
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ScrollPositionUpdate ScrollPositionUpdate::NewScrollframe(
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nsPoint aInitialPosition) {
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ScrollPositionUpdate ret;
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ret.mScrollGeneration = sGenerationCounter.NewMainThreadGeneration();
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ret.mScrollMode = ScrollMode::Instant;
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ret.mDestination = CSSPoint::FromAppUnits(aInitialPosition);
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return ret;
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}
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/*static*/
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ScrollPositionUpdate ScrollPositionUpdate::NewScroll(ScrollOrigin aOrigin,
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nsPoint aDestination) {
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MOZ_ASSERT(aOrigin != ScrollOrigin::NotSpecified);
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MOZ_ASSERT(aOrigin != ScrollOrigin::None);
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ScrollPositionUpdate ret;
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ret.mScrollGeneration = sGenerationCounter.NewMainThreadGeneration();
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ret.mType = ScrollUpdateType::Absolute;
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ret.mScrollMode = ScrollMode::Instant;
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ret.mScrollOrigin = aOrigin;
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ret.mDestination = CSSPoint::FromAppUnits(aDestination);
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return ret;
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}
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/*static*/
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ScrollPositionUpdate ScrollPositionUpdate::NewRelativeScroll(
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nsPoint aSource, nsPoint aDestination) {
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ScrollPositionUpdate ret;
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ret.mScrollGeneration = sGenerationCounter.NewMainThreadGeneration();
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ret.mType = ScrollUpdateType::Relative;
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ret.mScrollMode = ScrollMode::Instant;
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ret.mScrollOrigin = ScrollOrigin::Relative;
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ret.mDestination = CSSPoint::FromAppUnits(aDestination);
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ret.mSource = CSSPoint::FromAppUnits(aSource);
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return ret;
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}
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/*static*/
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ScrollPositionUpdate ScrollPositionUpdate::NewSmoothScroll(
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ScrollOrigin aOrigin, nsPoint aDestination,
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ScrollTriggeredByScript aTriggeredByScript) {
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MOZ_ASSERT(aOrigin != ScrollOrigin::NotSpecified);
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MOZ_ASSERT(aOrigin != ScrollOrigin::None);
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ScrollPositionUpdate ret;
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ret.mScrollGeneration = sGenerationCounter.NewMainThreadGeneration();
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ret.mType = ScrollUpdateType::Absolute;
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ret.mScrollMode = ScrollMode::SmoothMsd;
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ret.mScrollOrigin = aOrigin;
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ret.mDestination = CSSPoint::FromAppUnits(aDestination);
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ret.mTriggeredByScript = aTriggeredByScript;
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return ret;
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}
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/*static*/
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ScrollPositionUpdate ScrollPositionUpdate::NewPureRelativeScroll(
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ScrollOrigin aOrigin, ScrollMode aMode, const nsPoint& aDelta) {
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MOZ_ASSERT(aOrigin != ScrollOrigin::NotSpecified);
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MOZ_ASSERT(aOrigin != ScrollOrigin::None);
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ScrollPositionUpdate ret;
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ret.mScrollGeneration = sGenerationCounter.NewMainThreadGeneration();
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ret.mType = ScrollUpdateType::PureRelative;
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ret.mScrollMode = aMode;
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ret.mScrollOrigin = aOrigin;
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ret.mDelta = CSSPoint::FromAppUnits(aDelta);
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return ret;
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}
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bool ScrollPositionUpdate::operator==(
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const ScrollPositionUpdate& aOther) const {
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// instances are immutable, and all the fields are set when the generation
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// is set. So if the generation matches, these instances are identical.
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return mScrollGeneration == aOther.mScrollGeneration;
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}
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MainThreadScrollGeneration ScrollPositionUpdate::GetGeneration() const {
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return mScrollGeneration;
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}
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ScrollUpdateType ScrollPositionUpdate::GetType() const { return mType; }
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ScrollMode ScrollPositionUpdate::GetMode() const { return mScrollMode; }
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ScrollOrigin ScrollPositionUpdate::GetOrigin() const { return mScrollOrigin; }
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CSSPoint ScrollPositionUpdate::GetDestination() const {
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MOZ_ASSERT(mType == ScrollUpdateType::Absolute ||
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mType == ScrollUpdateType::Relative);
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return mDestination;
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}
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CSSPoint ScrollPositionUpdate::GetSource() const {
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MOZ_ASSERT(mType == ScrollUpdateType::Relative);
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return mSource;
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}
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CSSPoint ScrollPositionUpdate::GetDelta() const {
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MOZ_ASSERT(mType == ScrollUpdateType::PureRelative);
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return mDelta;
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}
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std::ostream& operator<<(std::ostream& aStream,
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const ScrollPositionUpdate& aUpdate) {
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aStream << "{ gen=" << aUpdate.mScrollGeneration
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<< ", type=" << (int)aUpdate.mType
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<< ", mode=" << (int)aUpdate.mScrollMode
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<< ", origin=" << (int)aUpdate.mScrollOrigin
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<< ", dst=" << aUpdate.mDestination << ", src=" << aUpdate.mSource
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<< ", delta=" << aUpdate.mDelta
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<< ", triggered by script=" << aUpdate.WasTriggeredByScript() << " }";
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return aStream;
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}
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} // namespace mozilla
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