[Media Router] Add MediaSink subtypes

chrome/browser/media/router/mojo/media_router_struct_traits.cc

 // 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 "chrome/browser/media/router/mojo/media_router_struct_traits.h"
 
 #include "chrome/browser/media/router/media_source.h"
+#include "url/mojo/url_gurl_struct_traits.h"
 
 namespace mojo {
 
 // static
 bool StructTraits<media_router::mojom::IssueDataView, media_router::IssueInfo>::
     Read(media_router::mojom::IssueDataView data,
          media_router::IssueInfo* out) {
   if (!data.ReadTitle(&out->title))
     return false;
 
@@ skipping 18 matching lines @@
 
   out->route_id = route_id.value_or(std::string());
 
   out->is_blocking = data.is_blocking();
   out->help_page_id = data.help_page_id();
 
   return true;
 }
 
 // static
-bool StructTraits<
-    media_router::mojom::MediaSinkDataView,
-    media_router::MediaSink>::Read(media_router::mojom::MediaSinkDataView data,
-                                   media_router::MediaSink* out) {
+bool StructTraits<media_router::mojom::IPAddressDataView, net::IPAddress>::Read(
+    media_router::mojom::IPAddressDataView data,
+    net::IPAddress* out) {
+  std::vector<uint8_t> bytes;
+  if (!data.ReadAddress(&bytes))
+    return false;
+
+  *out = net::IPAddress(bytes);
+  return true;
+}
+
+// static
+media_router::mojom::MediaSinkExtraDataDataView::Tag
+UnionTraits<media_router::mojom::MediaSinkExtraDataDataView,
+            media_router::MediaSinkInternal>::
+    GetTag(const media_router::MediaSinkInternal& sink) {
+  if (sink.is_dial_sink()) {
+    return media_router::mojom::MediaSinkExtraDataDataView::Tag::
+        DIAL_MEDIA_SINK;
+  } else if (sink.is_cast_sink()) {
+    return media_router::mojom::MediaSinkExtraDataDataView::Tag::
+        CAST_MEDIA_SINK;
+  }
+  NOTREACHED();
+  return media_router::mojom::MediaSinkExtraDataDataView::Tag::CAST_MEDIA_SINK;
+}
+
+// static
+bool StructTraits<media_router::mojom::MediaSinkDataView,
+                  media_router::MediaSinkInternal>::
+    Read(media_router::mojom::MediaSinkDataView data,
+         media_router::MediaSinkInternal* out) {
   media_router::MediaSink::Id id;
-  if (!data.ReadSinkId(&id))
+  if (!data.ReadSinkId(&id) ||
+      !media_router::MediaSinkInternal::IsValidSinkId(id)) {
     return false;
+  }
 
   out->set_sink_id(id);
 
   std::string name;
   if (!data.ReadName(&name))
     return false;
 
   out->set_name(name);
 
   base::Optional<std::string> description;
   if (!data.ReadDescription(&description))
     return false;
 
   if (description)
     out->set_description(*description);
 
   base::Optional<std::string> domain;
   if (!data.ReadDomain(&domain))
     return false;
 
   if (domain)
     out->set_domain(*domain);
 
   media_router::MediaSink::IconType icon_type;
   if (!data.ReadIconType(&icon_type))
     return false;
 
   out->set_icon_type(icon_type);
 
+  media_router::mojom::MediaSinkExtraDataDataView extra_data_data_view;
+  data.GetExtraDataDataView(&extra_data_data_view);
+
+  if (extra_data_data_view.is_null()) {

[dcheng, 2017/03/06 23:02:05]

Is it possible to:
- name the new union instead of making it anonymous
- add a typemap entry for it

then we can just use the struct traits automatic dispatching instead of having
to manually dispatch here.

[zhaobin, 2017/03/07 19:28:49]

Done.

+    return true;
+  } else if (extra_data_data_view.is_dial_media_sink()) {
+    media_router::DialSinkExtraData extra_data;
+    if (!extra_data_data_view.ReadDialMediaSink(&extra_data))
+      return false;
+
+    out->set_dial_data(extra_data);
+  } else if (extra_data_data_view.is_cast_media_sink()) {
+    media_router::CastSinkExtraData extra_data;
+    if (!extra_data_data_view.ReadCastMediaSink(&extra_data))
+      return false;
+
+    out->set_cast_data(extra_data);
+  }
+
   return true;
 }
 
 // static
+bool StructTraits<media_router::mojom::DialMediaSinkDataView,
+                  media_router::DialSinkExtraData>::
+    Read(media_router::mojom::DialMediaSinkDataView data,
+         media_router::DialSinkExtraData* out) {
+  if (!data.ReadIpAddress(&out->ip_address))
+    return false;
+
+  if (!data.ReadModelName(&out->model_name))
+    return false;
+
+  if (!data.ReadAppUrl(&out->app_url))
+    return false;
+
+  return true;
+}
+
+// static
+bool StructTraits<media_router::mojom::CastMediaSinkDataView,
+                  media_router::CastSinkExtraData>::
+    Read(media_router::mojom::CastMediaSinkDataView data,
+         media_router::CastSinkExtraData* out) {
+  if (!data.ReadIpAddress(&out->ip_address))
+    return false;
+
+  if (!data.ReadModelName(&out->model_name))
+    return false;
+
+  out->capabilities = data.capabilities();
+  out->cast_channel_id = data.cast_channel_id();
+
+  return true;
+}
+
 bool StructTraits<media_router::mojom::MediaRouteDataView,
                   media_router::MediaRoute>::
     Read(media_router::mojom::MediaRouteDataView data,
          media_router::MediaRoute* out) {
   media_router::MediaRoute::Id media_route_id;
   if (!data.ReadMediaRouteId(&media_route_id))
     return false;
 
   out->set_media_route_id(media_route_id);
 
@@ skipping 25 matching lines @@
 
   out->set_local(data.is_local());
   out->set_for_display(data.for_display());
   out->set_incognito(data.is_incognito());
   out->set_offscreen_presentation(data.is_offscreen_presentation());
 
   return true;
 }
 
 }  // namespace mojo