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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "nsSMILInterval.h"
nsSMILInterval::nsSMILInterval()
:
mBeginFixed(false),
mEndFixed(false)
{
}
nsSMILInterval::nsSMILInterval(const nsSMILInterval& aOther)
:
mBegin(aOther.mBegin),
mEnd(aOther.mEnd),
mBeginFixed(false),
mEndFixed(false)
{
MOZ_ASSERT(aOther.mDependentTimes.IsEmpty(),
"Attempt to copy-construct an interval with dependent times; this "
"will lead to instance times being shared between intervals.");
// For the time being we don't allow intervals with fixed endpoints to be
// copied since we only ever copy-construct to establish a new current
// interval. If we ever need to copy historical intervals we may need to move
// the ReleaseFixedEndpoint calls from Unlink to the dtor.
MOZ_ASSERT(!aOther.mBeginFixed && !aOther.mEndFixed,
"Attempt to copy-construct an interval with fixed endpoints");
}
nsSMILInterval::~nsSMILInterval()
{
MOZ_ASSERT(mDependentTimes.IsEmpty(),
"Destroying interval without disassociating dependent instance "
"times. Unlink was not called");
}
void
nsSMILInterval::Unlink(bool aFiltered)
{
for (int32_t i = mDependentTimes.Length() - 1; i >= 0; --i) {
if (aFiltered) {
mDependentTimes[i]->HandleFilteredInterval();
} else {
mDependentTimes[i]->HandleDeletedInterval();
}
}
mDependentTimes.Clear();
if (mBegin && mBeginFixed) {
mBegin->ReleaseFixedEndpoint();
}
mBegin = nullptr;
if (mEnd && mEndFixed) {
mEnd->ReleaseFixedEndpoint();
}
mEnd = nullptr;
}
nsSMILInstanceTime*
nsSMILInterval::Begin()
{
MOZ_ASSERT(mBegin && mEnd,
"Requesting Begin() on un-initialized interval.");
return mBegin;
}
nsSMILInstanceTime*
nsSMILInterval::End()
{
MOZ_ASSERT(mBegin && mEnd,
"Requesting End() on un-initialized interval.");
return mEnd;
}
void
nsSMILInterval::SetBegin(nsSMILInstanceTime& aBegin)
{
MOZ_ASSERT(aBegin.Time().IsDefinite(),
"Attempt to set unresolved or indefinite begin time on interval");
MOZ_ASSERT(!mBeginFixed,
"Attempt to set begin time but the begin point is fixed");
// Check that we're not making an instance time dependent on itself. Such an
// arrangement does not make intuitive sense and should be detected when
// creating or updating intervals.
MOZ_ASSERT(!mBegin || aBegin.GetBaseTime() != mBegin,
"Attempt to make self-dependent instance time");
mBegin = &aBegin;
}
void
nsSMILInterval::SetEnd(nsSMILInstanceTime& aEnd)
{
MOZ_ASSERT(!mEndFixed,
"Attempt to set end time but the end point is fixed");
// As with SetBegin, check we're not making an instance time dependent on
// itself.
MOZ_ASSERT(!mEnd || aEnd.GetBaseTime() != mEnd,
"Attempting to make self-dependent instance time");
mEnd = &aEnd;
}
void
nsSMILInterval::FixBegin()
{
MOZ_ASSERT(mBegin && mEnd,
"Fixing begin point on un-initialized interval");
MOZ_ASSERT(!mBeginFixed, "Duplicate calls to FixBegin()");
mBeginFixed = true;
mBegin->AddRefFixedEndpoint();
}
void
nsSMILInterval::FixEnd()
{
MOZ_ASSERT(mBegin && mEnd,
"Fixing end point on un-initialized interval");
MOZ_ASSERT(mBeginFixed,
"Fixing the end of an interval without a fixed begin");
MOZ_ASSERT(!mEndFixed, "Duplicate calls to FixEnd()");
mEndFixed = true;
mEnd->AddRefFixedEndpoint();
}
void
nsSMILInterval::AddDependentTime(nsSMILInstanceTime& aTime)
{
RefPtr<nsSMILInstanceTime>* inserted =
mDependentTimes.InsertElementSorted(&aTime);
if (!inserted) {
NS_WARNING("Insufficient memory to insert instance time.");
}
}
void
nsSMILInterval::RemoveDependentTime(const nsSMILInstanceTime& aTime)
{
#ifdef DEBUG
bool found =
#endif
mDependentTimes.RemoveElementSorted(&aTime);
MOZ_ASSERT(found, "Couldn't find instance time to delete.");
}
void
nsSMILInterval::GetDependentTimes(InstanceTimeList& aTimes)
{
aTimes = mDependentTimes;
}
bool
nsSMILInterval::IsDependencyChainLink() const
{
if (!mBegin || !mEnd)
return false; // Not yet initialised so it can't be part of a chain
if (mDependentTimes.IsEmpty())
return false; // No dependents, chain end
// So we have dependents, but we're still only a link in the chain (as opposed
// to the end of the chain) if one of our endpoints is dependent on an
// interval other than ourselves.
return (mBegin->IsDependent() && mBegin->GetBaseInterval() != this) ||
(mEnd->IsDependent() && mEnd->GetBaseInterval() != this);
}
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