tor-browser

The Tor Browser
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MediaKeyStatusMap.cpp (3425B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
      5 * You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #include "mozilla/dom/MediaKeyStatusMap.h"
      8 
      9 #include "GMPUtils.h"
     10 #include "mozilla/EMEUtils.h"
     11 #include "mozilla/dom/BufferSourceBinding.h"
     12 #include "mozilla/dom/ToJSValue.h"
     13 #include "mozilla/dom/UnionTypes.h"
     14 #include "nsPIDOMWindow.h"
     15 
     16 namespace mozilla::dom {
     17 
     18 NS_IMPL_CYCLE_COLLECTING_ADDREF(MediaKeyStatusMap)
     19 NS_IMPL_CYCLE_COLLECTING_RELEASE(MediaKeyStatusMap)
     20 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MediaKeyStatusMap)
     21  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
     22  NS_INTERFACE_MAP_ENTRY(nsISupports)
     23 NS_INTERFACE_MAP_END
     24 NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(MediaKeyStatusMap, mParent)
     25 
     26 MediaKeyStatusMap::MediaKeyStatusMap(nsPIDOMWindowInner* aParent)
     27    : mParent(aParent) {}
     28 
     29 MediaKeyStatusMap::~MediaKeyStatusMap() = default;
     30 
     31 JSObject* MediaKeyStatusMap::WrapObject(JSContext* aCx,
     32                                        JS::Handle<JSObject*> aGivenProto) {
     33  return MediaKeyStatusMap_Binding::Wrap(aCx, this, aGivenProto);
     34 }
     35 
     36 nsPIDOMWindowInner* MediaKeyStatusMap::GetParentObject() const {
     37  return mParent;
     38 }
     39 
     40 const MediaKeyStatusMap::KeyStatus* MediaKeyStatusMap::FindKey(
     41    const BufferSource& aKey) const {
     42  MOZ_ASSERT(aKey.IsArrayBuffer() || aKey.IsArrayBufferView());
     43 
     44  return ProcessTypedArrays(aKey,
     45                            [&](const Span<const uint8_t>& aData,
     46                                JS::AutoCheckCannotGC&&) -> const KeyStatus* {
     47                              for (const KeyStatus& status : mStatuses) {
     48                                if (aData == Span(status.mKeyId)) {
     49                                  return &status;
     50                                }
     51                              }
     52                              return nullptr;
     53                            });
     54 }
     55 
     56 void MediaKeyStatusMap::Get(const BufferSource& aKey,
     57                            OwningMediaKeyStatusOrUndefined& aOutValue,
     58                            ErrorResult& aOutRv) const {
     59  const KeyStatus* status = FindKey(aKey);
     60  if (!status) {
     61    aOutValue.SetUndefined();
     62    return;
     63  }
     64 
     65  aOutValue.SetAsMediaKeyStatus() = status->mStatus;
     66 }
     67 
     68 bool MediaKeyStatusMap::Has(const BufferSource& aKey) const {
     69  return FindKey(aKey);
     70 }
     71 
     72 uint32_t MediaKeyStatusMap::GetIterableLength() const {
     73  return mStatuses.Length();
     74 }
     75 
     76 TypedArrayCreator<ArrayBuffer> MediaKeyStatusMap::GetKeyAtIndex(
     77    uint32_t aIndex) const {
     78  MOZ_ASSERT(aIndex < GetIterableLength());
     79  return TypedArrayCreator<ArrayBuffer>(mStatuses[aIndex].mKeyId);
     80 }
     81 
     82 nsString MediaKeyStatusMap::GetKeyIDAsHexString(uint32_t aIndex) const {
     83  MOZ_ASSERT(aIndex < GetIterableLength());
     84  return NS_ConvertUTF8toUTF16(ToHexString(mStatuses[aIndex].mKeyId));
     85 }
     86 
     87 MediaKeyStatus MediaKeyStatusMap::GetValueAtIndex(uint32_t aIndex) const {
     88  MOZ_ASSERT(aIndex < GetIterableLength());
     89  return mStatuses[aIndex].mStatus;
     90 }
     91 
     92 uint32_t MediaKeyStatusMap::Size() const { return mStatuses.Length(); }
     93 
     94 void MediaKeyStatusMap::Update(const nsTArray<CDMCaps::KeyStatus>& aKeys) {
     95  mStatuses.Clear();
     96  for (const auto& key : aKeys) {
     97    mStatuses.InsertElementSorted(KeyStatus(key.mId, key.mStatus));
     98  }
     99 }
    100 
    101 }  // namespace mozilla::dom