1 files changed, 154 insertions, 0 deletions
diff --git a/dom/media/mediasession/MediaMetadata.cpp b/dom/media/mediasession/MediaMetadata.cpp
new file mode 100644
index 0000000000..8ee2c217ac
--- /dev/null
+++ b/dom/media/mediasession/MediaMetadata.cpp
@@ -0,0 +1,154 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* 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/MediaMetadata.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/MediaSessionBinding.h"
+#include "mozilla/dom/ScriptSettings.h"
+#include "mozilla/dom/ToJSValue.h"
+#include "nsNetUtil.h"
+
+namespace mozilla::dom {
+
+// Only needed for refcounted objects.
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(MediaMetadata, mParent)
+NS_IMPL_CYCLE_COLLECTING_ADDREF(MediaMetadata)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(MediaMetadata)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MediaMetadata)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+MediaMetadata::MediaMetadata(nsIGlobalObject* aParent, const nsString& aTitle,
+                             const nsString& aArtist, const nsString& aAlbum)
+    : MediaMetadataBase(aTitle, aArtist, aAlbum), mParent(aParent) {
+  MOZ_ASSERT(mParent);
+}
+
+nsIGlobalObject* MediaMetadata::GetParentObject() const { return mParent; }
+
+JSObject* MediaMetadata::WrapObject(JSContext* aCx,
+                                    JS::Handle<JSObject*> aGivenProto) {
+  return MediaMetadata_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+already_AddRefed<MediaMetadata> MediaMetadata::Constructor(
+    const GlobalObject& aGlobal, const MediaMetadataInit& aInit,
+    ErrorResult& aRv) {
+  nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
+  if (!global) {
+    aRv.Throw(NS_ERROR_FAILURE);
+    return nullptr;
+  }
+
+  RefPtr<MediaMetadata> mediaMetadata =
+      new MediaMetadata(global, aInit.mTitle, aInit.mArtist, aInit.mAlbum);
+  mediaMetadata->SetArtworkInternal(aInit.mArtwork, aRv);
+  return aRv.Failed() ? nullptr : mediaMetadata.forget();
+}
+
+void MediaMetadata::GetTitle(nsString& aRetVal) const { aRetVal = mTitle; }
+
+void MediaMetadata::SetTitle(const nsAString& aTitle) { mTitle = aTitle; }
+
+void MediaMetadata::GetArtist(nsString& aRetVal) const { aRetVal = mArtist; }
+
+void MediaMetadata::SetArtist(const nsAString& aArtist) { mArtist = aArtist; }
+
+void MediaMetadata::GetAlbum(nsString& aRetVal) const { aRetVal = mAlbum; }
+
+void MediaMetadata::SetAlbum(const nsAString& aAlbum) { mAlbum = aAlbum; }
+
+void MediaMetadata::GetArtwork(JSContext* aCx, nsTArray<JSObject*>& aRetVal,
+                               ErrorResult& aRv) const {
+  // Convert the MediaImages to JS Objects
+  if (!aRetVal.SetCapacity(mArtwork.Length(), fallible)) {
+    aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
+    return;
+  }
+
+  for (size_t i = 0; i < mArtwork.Length(); ++i) {
+    JS::Rooted<JS::Value> value(aCx);
+    if (!ToJSValue(aCx, mArtwork[i], &value)) {
+      aRv.NoteJSContextException(aCx);
+      return;
+    }
+
+    JS::Rooted<JSObject*> object(aCx, &value.toObject());
+    if (!JS_FreezeObject(aCx, object)) {
+      aRv.NoteJSContextException(aCx);
+      return;
+    }
+
+    aRetVal.AppendElement(object);
+  }
+}
+
+void MediaMetadata::SetArtwork(JSContext* aCx,
+                               const Sequence<JSObject*>& aArtwork,
+                               ErrorResult& aRv) {
+  // Convert the JS Objects to MediaImages
+  Sequence<MediaImage> artwork;
+  if (!artwork.SetCapacity(aArtwork.Length(), fallible)) {
+    aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
+    return;
+  }
+
+  for (JSObject* object : aArtwork) {
+    JS::Rooted<JS::Value> value(aCx, JS::ObjectValue(*object));
+
+    MediaImage* image = artwork.AppendElement(fallible);
+    MOZ_ASSERT(image, "The capacity is preallocated");
+    if (!image->Init(aCx, value)) {
+      aRv.NoteJSContextException(aCx);
+      return;
+    }
+  }
+
+  SetArtworkInternal(artwork, aRv);
+};
+
+static nsIURI* GetEntryBaseURL() {
+  nsCOMPtr<Document> doc = GetEntryDocument();
+  return doc ? doc->GetDocBaseURI() : nullptr;
+}
+
+// `aURL` is an inout parameter.
+static nsresult ResolveURL(nsString& aURL, nsIURI* aBaseURI) {
+  nsCOMPtr<nsIURI> uri;
+  nsresult rv = NS_NewURI(getter_AddRefs(uri), aURL,
+                          /* UTF-8 for charset */ nullptr, aBaseURI);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  nsAutoCString spec;
+  rv = uri->GetSpec(spec);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  CopyUTF8toUTF16(spec, aURL);
+  return NS_OK;
+}
+
+void MediaMetadata::SetArtworkInternal(const Sequence<MediaImage>& aArtwork,
+                                       ErrorResult& aRv) {
+  nsTArray<MediaImage> artwork;
+  artwork.Assign(aArtwork);
+
+  nsCOMPtr<nsIURI> baseURI = GetEntryBaseURL();
+  for (MediaImage& image : artwork) {
+    nsresult rv = ResolveURL(image.mSrc, baseURI);
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      aRv.ThrowTypeError<MSG_INVALID_URL>(NS_ConvertUTF16toUTF8(image.mSrc));
+      return;
+    }
+  }
+  mArtwork = std::move(artwork);
+}
+
+}  // namespace mozilla::dom