From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 02:47:55 +0200 Subject: Adding upstream version 124.0.1. Signed-off-by: Daniel Baumann --- dom/smil/SMILInstanceTime.cpp | 188 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 188 insertions(+) create mode 100644 dom/smil/SMILInstanceTime.cpp (limited to 'dom/smil/SMILInstanceTime.cpp') diff --git a/dom/smil/SMILInstanceTime.cpp b/dom/smil/SMILInstanceTime.cpp new file mode 100644 index 0000000000..7f38b8c1d7 --- /dev/null +++ b/dom/smil/SMILInstanceTime.cpp @@ -0,0 +1,188 @@ +/* -*- 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 "SMILInstanceTime.h" + +#include "mozilla/AutoRestore.h" +#include "mozilla/SMILInterval.h" +#include "mozilla/SMILTimeValueSpec.h" + +namespace mozilla { + +//---------------------------------------------------------------------- +// Implementation + +SMILInstanceTime::SMILInstanceTime(const SMILTimeValue& aTime, + SMILInstanceTimeSource aSource, + SMILTimeValueSpec* aCreator, + SMILInterval* aBaseInterval) + : mTime(aTime), + mFlags(0), + mVisited(false), + mFixedEndpointRefCnt(0), + mSerial(0), + mCreator(aCreator), + mBaseInterval(nullptr) // This will get set to aBaseInterval in a call to + // SetBaseInterval() at end of constructor +{ + switch (aSource) { + case SOURCE_NONE: + // No special flags + break; + + case SOURCE_DOM: + mFlags = kDynamic | kFromDOM; + break; + + case SOURCE_SYNCBASE: + mFlags = kMayUpdate; + break; + + case SOURCE_EVENT: + mFlags = kDynamic; + break; + } + + SetBaseInterval(aBaseInterval); +} + +SMILInstanceTime::~SMILInstanceTime() { + MOZ_ASSERT(!mBaseInterval, + "Destroying instance time without first calling Unlink()"); + MOZ_ASSERT(mFixedEndpointRefCnt == 0, + "Destroying instance time that is still used as the fixed " + "endpoint of an interval"); +} + +void SMILInstanceTime::Unlink() { + RefPtr deathGrip(this); + if (mBaseInterval) { + mBaseInterval->RemoveDependentTime(*this); + mBaseInterval = nullptr; + } + mCreator = nullptr; +} + +void SMILInstanceTime::HandleChangedInterval( + const SMILTimeContainer* aSrcContainer, bool aBeginObjectChanged, + bool aEndObjectChanged) { + // It's possible a sequence of notifications might cause our base interval to + // be updated and then deleted. Furthermore, the delete might happen whilst + // we're still in the queue to be notified of the change. In any case, if we + // don't have a base interval, just ignore the change. + if (!mBaseInterval) return; + + MOZ_ASSERT(mCreator, "Base interval is set but creator is not."); + + if (mVisited) { + // Break the cycle here + Unlink(); + return; + } + + bool objectChanged = + mCreator->DependsOnBegin() ? aBeginObjectChanged : aEndObjectChanged; + + RefPtr deathGrip(this); + mozilla::AutoRestore setVisited(mVisited); + mVisited = true; + + mCreator->HandleChangedInstanceTime(*GetBaseTime(), aSrcContainer, *this, + objectChanged); +} + +void SMILInstanceTime::HandleDeletedInterval() { + MOZ_ASSERT(mBaseInterval, + "Got call to HandleDeletedInterval on an independent instance " + "time"); + MOZ_ASSERT(mCreator, "Base interval is set but creator is not"); + + mBaseInterval = nullptr; + mFlags &= ~kMayUpdate; // Can't update without a base interval + + RefPtr deathGrip(this); + mCreator->HandleDeletedInstanceTime(*this); + mCreator = nullptr; +} + +void SMILInstanceTime::HandleFilteredInterval() { + MOZ_ASSERT(mBaseInterval, + "Got call to HandleFilteredInterval on an independent instance " + "time"); + + mBaseInterval = nullptr; + mFlags &= ~kMayUpdate; // Can't update without a base interval + mCreator = nullptr; +} + +bool SMILInstanceTime::ShouldPreserve() const { + return mFixedEndpointRefCnt > 0 || (mFlags & kWasDynamicEndpoint); +} + +void SMILInstanceTime::UnmarkShouldPreserve() { + mFlags &= ~kWasDynamicEndpoint; +} + +void SMILInstanceTime::AddRefFixedEndpoint() { + MOZ_ASSERT(mFixedEndpointRefCnt < UINT16_MAX, + "Fixed endpoint reference count upper limit reached"); + ++mFixedEndpointRefCnt; + mFlags &= ~kMayUpdate; // Once fixed, always fixed +} + +void SMILInstanceTime::ReleaseFixedEndpoint() { + MOZ_ASSERT(mFixedEndpointRefCnt > 0, "Duplicate release"); + --mFixedEndpointRefCnt; + if (mFixedEndpointRefCnt == 0 && IsDynamic()) { + mFlags |= kWasDynamicEndpoint; + } +} + +bool SMILInstanceTime::IsDependentOn(const SMILInstanceTime& aOther) const { + if (mVisited) return false; + + const SMILInstanceTime* myBaseTime = GetBaseTime(); + if (!myBaseTime) return false; + + if (myBaseTime == &aOther) return true; + + mozilla::AutoRestore setVisited(mVisited); + mVisited = true; + return myBaseTime->IsDependentOn(aOther); +} + +const SMILInstanceTime* SMILInstanceTime::GetBaseTime() const { + if (!mBaseInterval) { + return nullptr; + } + + MOZ_ASSERT(mCreator, "Base interval is set but there is no creator."); + if (!mCreator) { + return nullptr; + } + + return mCreator->DependsOnBegin() ? mBaseInterval->Begin() + : mBaseInterval->End(); +} + +void SMILInstanceTime::SetBaseInterval(SMILInterval* aBaseInterval) { + MOZ_ASSERT(!mBaseInterval, + "Attempting to reassociate an instance time with a different " + "interval."); + + if (aBaseInterval) { + MOZ_ASSERT(mCreator, + "Attempting to create a dependent instance time without " + "reference to the creating SMILTimeValueSpec object."); + if (!mCreator) return; + + aBaseInterval->AddDependentTime(*this); + } + + mBaseInterval = aBaseInterval; +} + +} // namespace mozilla -- cgit v1.2.3