mirror of
https://github.com/classilla/tenfourfox.git
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203 lines
4.3 KiB
C++
203 lines
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* 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 "mozilla/dom/TimeRanges.h"
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#include "mozilla/dom/TimeRangesBinding.h"
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#include "mozilla/dom/HTMLMediaElement.h"
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#include "nsError.h"
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namespace mozilla {
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namespace dom {
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(TimeRanges, mParent)
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NS_IMPL_CYCLE_COLLECTING_ADDREF(TimeRanges)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(TimeRanges)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(TimeRanges)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_INTERFACE_MAP_ENTRY(nsIDOMTimeRanges)
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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TimeRanges::TimeRanges()
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: mParent(nullptr)
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{
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}
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TimeRanges::TimeRanges(nsISupports* aParent)
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: mParent(aParent)
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{
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}
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TimeRanges::~TimeRanges()
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{
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}
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NS_IMETHODIMP
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TimeRanges::GetLength(uint32_t* aLength)
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{
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*aLength = Length();
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return NS_OK;
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}
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double
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TimeRanges::Start(uint32_t aIndex, ErrorResult& aRv)
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{
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if (aIndex >= mRanges.Length()) {
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aRv = NS_ERROR_DOM_INDEX_SIZE_ERR;
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return 0;
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}
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return mRanges[aIndex].mStart;
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}
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NS_IMETHODIMP
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TimeRanges::Start(uint32_t aIndex, double* aTime)
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{
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ErrorResult rv;
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*aTime = Start(aIndex, rv);
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return rv.StealNSResult();
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}
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double
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TimeRanges::End(uint32_t aIndex, ErrorResult& aRv)
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{
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if (aIndex >= mRanges.Length()) {
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aRv = NS_ERROR_DOM_INDEX_SIZE_ERR;
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return 0;
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}
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return mRanges[aIndex].mEnd;
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}
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NS_IMETHODIMP
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TimeRanges::End(uint32_t aIndex, double* aTime)
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{
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ErrorResult rv;
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*aTime = End(aIndex, rv);
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return rv.StealNSResult();
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}
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void
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TimeRanges::Add(double aStart, double aEnd)
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{
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if (aStart > aEnd) {
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NS_WARNING("Can't add a range if the end is older that the start.");
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return;
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}
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mRanges.AppendElement(TimeRange(aStart,aEnd));
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}
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double
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TimeRanges::GetStartTime()
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{
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if (mRanges.IsEmpty()) {
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return -1.0;
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}
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return mRanges[0].mStart;
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}
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double
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TimeRanges::GetEndTime()
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{
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if (mRanges.IsEmpty()) {
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return -1.0;
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}
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return mRanges[mRanges.Length() - 1].mEnd;
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}
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void
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TimeRanges::Normalize(double aTolerance)
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{
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if (mRanges.Length() >= 2) {
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nsAutoTArray<TimeRange,4> normalized;
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mRanges.Sort(CompareTimeRanges());
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// This merges the intervals.
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TimeRange current(mRanges[0]);
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for (uint32_t i = 1; i < mRanges.Length(); i++) {
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if (current.mStart <= mRanges[i].mStart &&
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current.mEnd >= mRanges[i].mEnd) {
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continue;
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}
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if (current.mEnd + aTolerance >= mRanges[i].mStart) {
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current.mEnd = mRanges[i].mEnd;
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} else {
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normalized.AppendElement(current);
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current = mRanges[i];
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}
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}
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normalized.AppendElement(current);
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mRanges = normalized;
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}
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}
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void
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TimeRanges::Union(const TimeRanges* aOtherRanges, double aTolerance)
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{
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mRanges.AppendElements(aOtherRanges->mRanges);
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Normalize(aTolerance);
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}
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void
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TimeRanges::Intersection(const TimeRanges* aOtherRanges)
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{
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nsAutoTArray<TimeRange,4> intersection;
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const nsTArray<TimeRange>& otherRanges = aOtherRanges->mRanges;
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for (index_type i = 0, j = 0; i < mRanges.Length() && j < otherRanges.Length();) {
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double start = std::max(mRanges[i].mStart, otherRanges[j].mStart);
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double end = std::min(mRanges[i].mEnd, otherRanges[j].mEnd);
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if (start < end) {
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intersection.AppendElement(TimeRange(start, end));
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}
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if (mRanges[i].mEnd < otherRanges[j].mEnd) {
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i += 1;
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} else {
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j += 1;
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}
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}
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mRanges = intersection;
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}
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TimeRanges::index_type
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TimeRanges::Find(double aTime, double aTolerance /* = 0 */)
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{
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for (index_type i = 0; i < mRanges.Length(); ++i) {
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if (aTime < mRanges[i].mEnd && (aTime + aTolerance) >= mRanges[i].mStart) {
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return i;
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}
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}
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return NoIndex;
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}
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JSObject*
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TimeRanges::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return TimeRangesBinding::Wrap(aCx, this, aGivenProto);
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}
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nsISupports*
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TimeRanges::GetParentObject() const
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{
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return mParent;
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}
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void
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TimeRanges::Shift(double aOffset)
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{
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for (index_type i = 0; i < mRanges.Length(); ++i) {
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mRanges[i].mStart += aOffset;
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mRanges[i].mEnd += aOffset;
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}
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}
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} // namespace dom
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} // namespace mozilla
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