Migrating MediaSession messages to mojo

third_party/WebKit/Source/modules/mediasession/MediaSessionStructTraits.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.
+
+#include "public/platform/modules/mediasession/media_session.mojom-blink.h"
+
+namespace mojo {
+
+template <>
+struct StructTraits<blink::mojom::blink::MediaImage::DataView,
+                    ::blink::MojoMediaArtwork> {
+  static const blink::KURL& src(const ::blink::MojoMediaArtwork& artwork) {
+    return artwork.src;
+  }
+
+  static const blink::WebString& type(
+      const ::blink::MojoMediaArtwork& artwork) {
+    return artwork.type;
+  }
+
+  static const WTF::Vector<blink::WebSize>& sizes(
+      const ::blink::MojoMediaArtwork& artwork) {
+    return artwork.sizes;
+  }
+
+  static bool Read(blink::mojom::blink::MediaImage::DataView data,
+                   ::blink::MojoMediaArtwork* 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::blink::MediaMetadata::DataView,
+                    ::blink::MojoMediaMetadata> {
+  static const blink::WebString& title(
+      const ::blink::MojoMediaMetadata& metadata) {
+    return metadata.title;
+  }
+
+  static const blink::WebString& artist(
+      const ::blink::MojoMediaMetadata& metadata) {
+    return metadata.artist;
+  }
+
+  static const blink::WebString& album(
+      const ::blink::MojoMediaMetadata& metadata) {
+    return metadata.album;
+  }
+
+  static const WTF::Vector<::blink::MojoMediaArtwork>& artwork(
+      const ::blink::MojoMediaMetadata& metadata) {
+    return metadata.artwork;
+  }
+
+  static bool Read(blink::mojom::blink::MediaMetadata::DataView data,
+                   ::blink::MojoMediaMetadata* 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