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dom/smil/nsSMILInterval.cpp@b8a032363ba2 (annotated)

dom/smil/nsSMILInterval.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Thu, 22 Jan 2015 13:21:57 +0100

branch

TOR_BUG_9701

changeset 15

b8a032363ba2

permissions

-rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

michael@0	1	/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0	2	/* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	3	* License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0	4	* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	5
michael@0	6	#include "nsSMILInterval.h"
michael@0	7
michael@0	8	nsSMILInterval::nsSMILInterval()
michael@0	9	:
michael@0	10	mBeginFixed(false),
michael@0	11	mEndFixed(false)
michael@0	12	{
michael@0	13	}
michael@0	14
michael@0	15	nsSMILInterval::nsSMILInterval(const nsSMILInterval& aOther)
michael@0	16	:
michael@0	17	mBegin(aOther.mBegin),
michael@0	18	mEnd(aOther.mEnd),
michael@0	19	mBeginFixed(false),
michael@0	20	mEndFixed(false)
michael@0	21	{
michael@0	22	NS_ABORT_IF_FALSE(aOther.mDependentTimes.IsEmpty(),
michael@0	23	"Attempting to copy-construct an interval with dependent times, "
michael@0	24	"this will lead to instance times being shared between intervals.");
michael@0	25
michael@0	26	// For the time being we don't allow intervals with fixed endpoints to be
michael@0	27	// copied since we only ever copy-construct to establish a new current
michael@0	28	// interval. If we ever need to copy historical intervals we may need to move
michael@0	29	// the ReleaseFixedEndpoint calls from Unlink to the dtor.
michael@0	30	NS_ABORT_IF_FALSE(!aOther.mBeginFixed && !aOther.mEndFixed,
michael@0	31	"Attempting to copy-construct an interval with fixed endpoints");
michael@0	32	}
michael@0	33
michael@0	34	nsSMILInterval::~nsSMILInterval()
michael@0	35	{
michael@0	36	NS_ABORT_IF_FALSE(mDependentTimes.IsEmpty(),
michael@0	37	"Destroying interval without disassociating dependent instance times. "
michael@0	38	"Unlink was not called");
michael@0	39	}
michael@0	40
michael@0	41	void
michael@0	42	nsSMILInterval::Unlink(bool aFiltered)
michael@0	43	{
michael@0	44	for (int32_t i = mDependentTimes.Length() - 1; i >= 0; --i) {
michael@0	45	if (aFiltered) {
michael@0	46	mDependentTimes[i]->HandleFilteredInterval();
michael@0	47	} else {
michael@0	48	mDependentTimes[i]->HandleDeletedInterval();
michael@0	49	}
michael@0	50	}
michael@0	51	mDependentTimes.Clear();
michael@0	52	if (mBegin && mBeginFixed) {
michael@0	53	mBegin->ReleaseFixedEndpoint();
michael@0	54	}
michael@0	55	mBegin = nullptr;
michael@0	56	if (mEnd && mEndFixed) {
michael@0	57	mEnd->ReleaseFixedEndpoint();
michael@0	58	}
michael@0	59	mEnd = nullptr;
michael@0	60	}
michael@0	61
michael@0	62	nsSMILInstanceTime*
michael@0	63	nsSMILInterval::Begin()
michael@0	64	{
michael@0	65	NS_ABORT_IF_FALSE(mBegin && mEnd,
michael@0	66	"Requesting Begin() on un-initialized interval.");
michael@0	67	return mBegin;
michael@0	68	}
michael@0	69
michael@0	70	nsSMILInstanceTime*
michael@0	71	nsSMILInterval::End()
michael@0	72	{
michael@0	73	NS_ABORT_IF_FALSE(mBegin && mEnd,
michael@0	74	"Requesting End() on un-initialized interval.");
michael@0	75	return mEnd;
michael@0	76	}
michael@0	77
michael@0	78	void
michael@0	79	nsSMILInterval::SetBegin(nsSMILInstanceTime& aBegin)
michael@0	80	{
michael@0	81	NS_ABORT_IF_FALSE(aBegin.Time().IsDefinite(),
michael@0	82	"Attempting to set unresolved or indefinite begin time on interval");
michael@0	83	NS_ABORT_IF_FALSE(!mBeginFixed,
michael@0	84	"Attempting to set begin time but the begin point is fixed");
michael@0	85	// Check that we're not making an instance time dependent on itself. Such an
michael@0	86	// arrangement does not make intuitive sense and should be detected when
michael@0	87	// creating or updating intervals.
michael@0	88	NS_ABORT_IF_FALSE(!mBegin || aBegin.GetBaseTime() != mBegin,
michael@0	89	"Attempting to make self-dependent instance time");
michael@0	90
michael@0	91	mBegin = &aBegin;
michael@0	92	}
michael@0	93
michael@0	94	void
michael@0	95	nsSMILInterval::SetEnd(nsSMILInstanceTime& aEnd)
michael@0	96	{
michael@0	97	NS_ABORT_IF_FALSE(!mEndFixed,
michael@0	98	"Attempting to set end time but the end point is fixed");
michael@0	99	// As with SetBegin, check we're not making an instance time dependent on
michael@0	100	// itself.
michael@0	101	NS_ABORT_IF_FALSE(!mEnd || aEnd.GetBaseTime() != mEnd,
michael@0	102	"Attempting to make self-dependent instance time");
michael@0	103
michael@0	104	mEnd = &aEnd;
michael@0	105	}
michael@0	106
michael@0	107	void
michael@0	108	nsSMILInterval::FixBegin()
michael@0	109	{
michael@0	110	NS_ABORT_IF_FALSE(mBegin && mEnd,
michael@0	111	"Fixing begin point on un-initialized interval");
michael@0	112	NS_ABORT_IF_FALSE(!mBeginFixed, "Duplicate calls to FixBegin()");
michael@0	113	mBeginFixed = true;
michael@0	114	mBegin->AddRefFixedEndpoint();
michael@0	115	}
michael@0	116
michael@0	117	void
michael@0	118	nsSMILInterval::FixEnd()
michael@0	119	{
michael@0	120	NS_ABORT_IF_FALSE(mBegin && mEnd,
michael@0	121	"Fixing end point on un-initialized interval");
michael@0	122	NS_ABORT_IF_FALSE(mBeginFixed,
michael@0	123	"Fixing the end of an interval without a fixed begin");
michael@0	124	NS_ABORT_IF_FALSE(!mEndFixed, "Duplicate calls to FixEnd()");
michael@0	125	mEndFixed = true;
michael@0	126	mEnd->AddRefFixedEndpoint();
michael@0	127	}
michael@0	128
michael@0	129	void
michael@0	130	nsSMILInterval::AddDependentTime(nsSMILInstanceTime& aTime)
michael@0	131	{
michael@0	132	nsRefPtr<nsSMILInstanceTime>* inserted =
michael@0	133	mDependentTimes.InsertElementSorted(&aTime);
michael@0	134	if (!inserted) {
michael@0	135	NS_WARNING("Insufficient memory to insert instance time.");
michael@0	136	}
michael@0	137	}
michael@0	138
michael@0	139	void
michael@0	140	nsSMILInterval::RemoveDependentTime(const nsSMILInstanceTime& aTime)
michael@0	141	{
michael@0	142	#ifdef DEBUG
michael@0	143	bool found =
michael@0	144	#endif
michael@0	145	mDependentTimes.RemoveElementSorted(&aTime);
michael@0	146	NS_ABORT_IF_FALSE(found, "Couldn't find instance time to delete.");
michael@0	147	}
michael@0	148
michael@0	149	void
michael@0	150	nsSMILInterval::GetDependentTimes(InstanceTimeList& aTimes)
michael@0	151	{
michael@0	152	aTimes = mDependentTimes;
michael@0	153	}
michael@0	154
michael@0	155	bool
michael@0	156	nsSMILInterval::IsDependencyChainLink() const
michael@0	157	{
michael@0	158	if (!mBegin || !mEnd)
michael@0	159	return false; // Not yet initialised so it can't be part of a chain
michael@0	160
michael@0	161	if (mDependentTimes.IsEmpty())
michael@0	162	return false; // No dependents, chain end
michael@0	163
michael@0	164	// So we have dependents, but we're still only a link in the chain (as opposed
michael@0	165	// to the end of the chain) if one of our endpoints is dependent on an
michael@0	166	// interval other than ourselves.
michael@0	167	return (mBegin->IsDependent() && mBegin->GetBaseInterval() != this) ||
michael@0	168	(mEnd->IsDependent() && mEnd->GetBaseInterval() != this);
michael@0	169	}