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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/. */
#ifndef mozilla_dom_MediaKeyStatuses_h
#define mozilla_dom_MediaKeyStatuses_h
#include "mozilla/ErrorResult.h"
#include "mozilla/Attributes.h"
#include "nsCycleCollectionParticipant.h"
#include "nsWrapperCache.h"
#include "mozilla/dom/TypedArray.h"
#include "mozilla/dom/MediaKeyStatusMapBinding.h"
#include "mozilla/CDMCaps.h"
class nsPIDOMWindowInner;
namespace mozilla {
namespace dom {
class ArrayBufferViewOrArrayBuffer;
// The MediaKeyStatusMap WebIDL interface; maps a keyId to its status.
// Note that the underlying "map" is stored in an array, since we assume
// that a MediaKeySession won't have many key statuses to report.
class MediaKeyStatusMap final : public nsISupports,
public nsWrapperCache
{
public:
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(MediaKeyStatusMap)
public:
explicit MediaKeyStatusMap(nsPIDOMWindowInner* aParent);
protected:
~MediaKeyStatusMap();
public:
nsPIDOMWindowInner* GetParentObject() const;
JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
void Get(JSContext* aCx,
const ArrayBufferViewOrArrayBuffer& aKey,
JS::MutableHandle<JS::Value> aOutValue,
ErrorResult& aOutRv) const;
bool Has(const ArrayBufferViewOrArrayBuffer& aKey) const;
uint32_t Size() const;
uint32_t GetIterableLength() const;
TypedArrayCreator<ArrayBuffer> GetKeyAtIndex(uint32_t aIndex) const;
MediaKeyStatus GetValueAtIndex(uint32_t aIndex) const;
void Update(const nsTArray<CDMCaps::KeyStatus>& keys);
private:
nsCOMPtr<nsPIDOMWindowInner> mParent;
struct KeyStatus {
KeyStatus(const nsTArray<uint8_t>& aKeyId,
MediaKeyStatus aStatus)
: mKeyId(aKeyId)
, mStatus(aStatus)
{
}
bool operator== (const KeyStatus& aOther) const {
return aOther.mKeyId == mKeyId;
}
bool operator<(const KeyStatus& aOther) const {
// Copy chromium and compare keys' bytes.
// Update once https://github.com/w3c/encrypted-media/issues/69
// is resolved.
const nsTArray<uint8_t>& other = aOther.mKeyId;
const nsTArray<uint8_t>& self = mKeyId;
size_t length = std::min<size_t>(other.Length(), self.Length());
int cmp = memcmp(self.Elements(), other.Elements(), length);
if (cmp != 0) {
return cmp < 0;
}
return self.Length() <= other.Length();
}
nsTArray<uint8_t> mKeyId;
MediaKeyStatus mStatus;
};
nsTArray<KeyStatus> mStatuses;
};
} // namespace dom
} // namespace mozilla
#endif
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