Migrating MediaSession messages to mojo

content/common/media/media_session_struct_traits.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_COMMON_MEDIA_MEDIA_SESSION_STRUCT_TRAITS_H_
+#define CONTENT_COMMON_MEDIA_MEDIA_SESSION_STRUCT_TRAITS_H_
+
+#include "third_party/WebKit/public/platform/modules/mediasession/media_session.mojom.h"
+
+namespace mojo {
+
+template <>
+struct StructTraits<blink::mojom::MediaImageDataView,
+                    content::MediaMetadata::Artwork> {
+  static const GURL& src(const content::MediaMetadata::Artwork& artwork) {
+    return artwork.src;
+  }
+
+  static const base::string16& type(
+      const content::MediaMetadata::Artwork& artwork) {
+    return artwork.type;
+  }
+
+  static const std::vector<gfx::Size>& sizes(
+      const content::MediaMetadata::Artwork& artwork) {
+    return artwork.sizes;
+  }
+
+  static bool Read(blink::mojom::MediaImageDataView data,
+                   content::MediaMetadata::Artwork* out) {
+    if (!data.ReadSrc(&out->src))
+      return false;
+    if (!data.ReadType(&out->type))
+      return false;
+    if (!data.ReadSizes(&out->sizes))
+      return false;
+
+    return true;
+  }
+};
+
+template <>
+struct StructTraits<blink::mojom::MediaMetadataDataView,
+                    content::MediaMetadata> {
+  static const base::string16& title(const content::MediaMetadata& metadata) {
+    return metadata.title;
+  }
+
+  static const base::string16& artist(const content::MediaMetadata& metadata) {
+    return metadata.artist;
+  }
+
+  static const base::string16& album(const content::MediaMetadata& metadata) {
+    return metadata.album;
+  }
+
+  static const std::vector<content::MediaMetadata::Artwork>& artwork(
+      const content::MediaMetadata& metadata) {
+    return metadata.artwork;
+  }
+
+  static bool Read(blink::mojom::MediaMetadataDataView data,
+                   content::MediaMetadata* out) {
+    if (!data.ReadTitle(&out->title))
+      return false;
+    if (!data.ReadArtist(&out->artist))
+      return false;
+    if (!data.ReadAlbum(&out->album))
+      return false;
+    if (!data.ReadArtwork(&out->artwork))
+      return false;
+
+    return true;
+  }
+};
+
+}  // namespace mojo
+
+#endif  // CONTENT_COMMON_MEDIA_MEDIA_SESSION_STRUCT_TRAITS_H_