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/* -*- 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 "mozilla/dom/TimeRanges.h"
#include "mozilla/dom/TimeRangesBinding.h"
#include "mozilla/dom/HTMLMediaElement.h"
#include "nsError.h"
namespace mozilla {
namespace dom {
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(TimeRanges, mParent)
NS_IMPL_CYCLE_COLLECTING_ADDREF(TimeRanges)
NS_IMPL_CYCLE_COLLECTING_RELEASE(TimeRanges)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(TimeRanges)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsIDOMTimeRanges)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
TimeRanges::TimeRanges()
: mParent(nullptr)
{
}
TimeRanges::TimeRanges(nsISupports* aParent)
: mParent(aParent)
{
}
TimeRanges::~TimeRanges()
{
}
NS_IMETHODIMP
TimeRanges::GetLength(uint32_t* aLength)
{
*aLength = Length();
return NS_OK;
}
double
TimeRanges::Start(uint32_t aIndex, ErrorResult& aRv)
{
if (aIndex >= mRanges.Length()) {
aRv = NS_ERROR_DOM_INDEX_SIZE_ERR;
return 0;
}
return mRanges[aIndex].mStart;
}
NS_IMETHODIMP
TimeRanges::Start(uint32_t aIndex, double* aTime)
{
ErrorResult rv;
*aTime = Start(aIndex, rv);
return rv.StealNSResult();
}
double
TimeRanges::End(uint32_t aIndex, ErrorResult& aRv)
{
if (aIndex >= mRanges.Length()) {
aRv = NS_ERROR_DOM_INDEX_SIZE_ERR;
return 0;
}
return mRanges[aIndex].mEnd;
}
NS_IMETHODIMP
TimeRanges::End(uint32_t aIndex, double* aTime)
{
ErrorResult rv;
*aTime = End(aIndex, rv);
return rv.StealNSResult();
}
void
TimeRanges::Add(double aStart, double aEnd)
{
if (aStart > aEnd) {
NS_WARNING("Can't add a range if the end is older that the start.");
return;
}
mRanges.AppendElement(TimeRange(aStart,aEnd));
}
double
TimeRanges::GetStartTime()
{
if (mRanges.IsEmpty()) {
return -1.0;
}
return mRanges[0].mStart;
}
double
TimeRanges::GetEndTime()
{
if (mRanges.IsEmpty()) {
return -1.0;
}
return mRanges[mRanges.Length() - 1].mEnd;
}
void
TimeRanges::Normalize(double aTolerance)
{
if (mRanges.Length() >= 2) {
AutoTArray<TimeRange,4> normalized;
mRanges.Sort(CompareTimeRanges());
// This merges the intervals.
TimeRange current(mRanges[0]);
for (uint32_t i = 1; i < mRanges.Length(); i++) {
if (current.mStart <= mRanges[i].mStart &&
current.mEnd >= mRanges[i].mEnd) {
continue;
}
if (current.mEnd + aTolerance >= mRanges[i].mStart) {
current.mEnd = mRanges[i].mEnd;
} else {
normalized.AppendElement(current);
current = mRanges[i];
}
}
normalized.AppendElement(current);
mRanges = normalized;
}
}
void
TimeRanges::Union(const TimeRanges* aOtherRanges, double aTolerance)
{
mRanges.AppendElements(aOtherRanges->mRanges);
Normalize(aTolerance);
}
void
TimeRanges::Intersection(const TimeRanges* aOtherRanges)
{
AutoTArray<TimeRange,4> intersection;
const nsTArray<TimeRange>& otherRanges = aOtherRanges->mRanges;
for (index_type i = 0, j = 0; i < mRanges.Length() && j < otherRanges.Length();) {
double start = std::max(mRanges[i].mStart, otherRanges[j].mStart);
double end = std::min(mRanges[i].mEnd, otherRanges[j].mEnd);
if (start < end) {
intersection.AppendElement(TimeRange(start, end));
}
if (mRanges[i].mEnd < otherRanges[j].mEnd) {
i += 1;
} else {
j += 1;
}
}
mRanges = intersection;
}
TimeRanges::index_type
TimeRanges::Find(double aTime, double aTolerance /* = 0 */)
{
for (index_type i = 0; i < mRanges.Length(); ++i) {
if (aTime < mRanges[i].mEnd && (aTime + aTolerance) >= mRanges[i].mStart) {
return i;
}
}
return NoIndex;
}
JSObject*
TimeRanges::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return TimeRangesBinding::Wrap(aCx, this, aGivenProto);
}
nsISupports*
TimeRanges::GetParentObject() const
{
return mParent;
}
void
TimeRanges::Shift(double aOffset)
{
for (index_type i = 0; i < mRanges.Length(); ++i) {
mRanges[i].mStart += aOffset;
mRanges[i].mEnd += aOffset;
}
}
} // namespace dom
} // namespace mozilla
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