Reland: Mojo: add javascript bindings for request/response

mojo/public/bindings/generators/js_templates/interface_definition.tmpl

Index: mojo/public/bindings/generators/js_templates/interface_definition.tmpl
diff --git a/mojo/public/bindings/generators/js_templates/interface_definition.tmpl b/mojo/public/bindings/generators/js_templates/interface_definition.tmpl
index df1483d1063bac333be991a66e3a729bb4d19180..fc77059e76ce136790ada9529ba66248916b9a1e 100644
--- a/mojo/public/bindings/generators/js_templates/interface_definition.tmpl
+++ b/mojo/public/bindings/generators/js_templates/interface_definition.tmpl
@@ -10,18 +10,40 @@
   {{interface.name}}Proxy.prototype.{{method.name|stylize_method}} = function(
 {%- for parameter in method.parameters -%}
 {{parameter.name}}{% if not loop.last %}, {% endif %}
-{%- endfor %}) {
+{%- endfor -%}
+{%- if method.response_parameters != None -%}
+, closure
+{%- endif -%}
+) {
     var params = new {{interface.name}}_{{method.name}}_Params();
 {%- for parameter in method.parameters %}
     params.{{parameter.name}} = {{parameter.name}};
 {%- endfor %}
 
+{%- if method.response_parameters == None %}
     var builder = new codec.MessageBuilder(
         k{{interface.name}}_{{method.name}}_Name,
         codec.align({{interface.name}}_{{method.name}}_Params.encodedSize));
     builder.encodeStruct({{interface.name}}_{{method.name}}_Params, params);
     var message = builder.finish();
     this.receiver_.accept(message);
+{%- else %}
+    var builder = new codec.MessageWithRequestIDBuilder(
+        k{{interface.name}}_{{method.name}}_Name,
+        codec.align({{interface.name}}_{{method.name}}_Params.encodedSize),
+        codec.kMessageExpectsResponse, 0);
+    builder.encodeStruct({{interface.name}}_{{method.name}}_Params, params);
+    var message = builder.finish();
+    this.receiver_.acceptWithResponder(message, { accept: function(message) {
+      var reader = new codec.MessageReader(message);
+      var responseParams =
+          reader.decodeStruct({{interface.name}}_{{method.name}}_ResponseParams);
+      closure(
+{%- for parameter in method.response_parameters -%}
+responseParams.{{parameter.name}}{% if not loop.last %}, {% endif %}
+{%- endfor -%});
+    }});
+{%- endif %}
   };
 {%- endfor %}
 
@@ -32,6 +54,7 @@
     var reader = new codec.MessageReader(message);
     switch (reader.messageName) {
 {%- for method in interface.methods %}
+{%- if method.response_parameters == None %}
     case k{{interface.name}}_{{method.name}}_Name:
       var params = reader.decodeStruct({{interface.name}}_{{method.name}}_Params);
       this.{{method.name|stylize_method}}(
@@ -39,6 +62,44 @@
 params.{{parameter.name}}{% if not loop.last %}, {% endif %}
 {%- endfor %});
       return true;
+{%- endif %}
+{%- endfor %}
+    default:
+      return false;
+    }
+  };
+
+  {{interface.name}}Stub.prototype.acceptWithResponder =
+      function(message, responder) {
+    var reader = new codec.MessageReader(message);
+    switch (reader.messageName) {
+{%- for method in interface.methods %}
+{%- if method.response_parameters != None %}
+    case k{{interface.name}}_{{method.name}}_Name:
+      var params = reader.decodeStruct({{interface.name}}_{{method.name}}_Params);
+      this.{{method.name|stylize_method}}(
+{%- for parameter in method.parameters -%}
+params.{{parameter.name}},
+{%- endfor %} function (
+{%- for parameter in method.response_parameters -%}
+{{parameter.name}}{% if not loop.last %}, {% endif -%}
+{%- endfor -%}) {
+        var responseParams =
+            new {{interface.name}}_{{method.name}}_ResponseParams();
+{%-     for parameter in method.response_parameters %}
+        responseParams.{{parameter.name}} = {{parameter.name}};
+{%-     endfor %}
+        var builder = new codec.MessageWithRequestIDBuilder(
+            k{{interface.name}}_{{method.name}}_Name,
+            codec.align({{interface.name}}_{{method.name}}_ResponseParams.encodedSize),
+            codec.kMessageIsResponse, reader.requestID);
+        builder.encodeStruct({{interface.name}}_{{method.name}}_ResponseParams,
+                             responseParams);
+        var message = builder.finish();
+        responder.accept(message);
+      });
+      return true;
+{%- endif %}
 {%- endfor %}
     default:
       return false;