forked from mirrors/gecko-dev
141 lines
4.8 KiB
C++
141 lines
4.8 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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ScrollMode aMode, ScrollOrigin aOrigin, nsPoint aDestination,
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ScrollTriggeredByScript aTriggeredByScript,
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UniquePtr<ScrollSnapTargetIds> aSnapTargetIds) {
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MOZ_ASSERT(aOrigin != ScrollOrigin::NotSpecified);
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MOZ_ASSERT(aOrigin != ScrollOrigin::None);
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MOZ_ASSERT(aMode == ScrollMode::Smooth || aMode == ScrollMode::SmoothMsd);
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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 = aMode;
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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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if (aSnapTargetIds) {
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ret.mSnapTargetIds = *aSnapTargetIds;
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}
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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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