Dart: Adds optional named arguments for creating bindings.

mojo/public/tools/bindings/generators/dart_templates/interface_definition.tmpl

Index: mojo/public/tools/bindings/generators/dart_templates/interface_definition.tmpl
diff --git a/mojo/public/tools/bindings/generators/dart_templates/interface_definition.tmpl b/mojo/public/tools/bindings/generators/dart_templates/interface_definition.tmpl
index cbd39ef51c051574d0a550745bd6babeff920c7a..16004f106cfeb22601d73f08cf78d2bd752fe6aa 100644
--- a/mojo/public/tools/bindings/generators/dart_templates/interface_definition.tmpl
+++ b/mojo/public/tools/bindings/generators/dart_templates/interface_definition.tmpl
@@ -38,10 +38,13 @@ abstract class {{interface|name}} {
 
 class {{interface|name}}ProxyImpl extends bindings.Proxy {
   {{interface|name}}ProxyImpl.fromEndpoint(
-      core.MojoMessagePipeEndpoint endpoint) : super(endpoint);
+      core.MojoMessagePipeEndpoint endpoint,
+      {bool doListen: true, Function onClosed}) :
+      super.fromEndpoint(endpoint, doListen: doListen, onClosed: onClosed);
 
-  {{interface|name}}ProxyImpl.fromHandle(core.MojoHandle handle) :
-      super.fromHandle(handle);
+  {{interface|name}}ProxyImpl.fromHandle(core.MojoHandle handle,
+      {bool doListen: true, Function onClosed}) :
+      super.fromHandle(handle, doListen: doListen, onClosed: onClosed);
 
   {{interface|name}}ProxyImpl.unbound() : super.unbound();
 
@@ -89,6 +92,7 @@ class _{{interface|name}}ProxyCalls implements {{interface|name}} {
   {%- endfor -%}
   {%- set request_struct = method|struct_from_method -%}
     ) {
+      assert(_proxyImpl.isBound);
       var params = new {{request_struct|name}}();
   {%- for parameter in method.parameters %}
       params.{{parameter|name}} = {{parameter|name}};
@@ -103,6 +107,7 @@ class _{{interface|name}}ProxyCalls implements {{interface|name}} {
       {{parameter.kind|dart_type}} {{parameter|name}},
   {%- endfor -%}
       [Function responseFactory = null]) {
+      assert(_proxyImpl.isBound);
       var params = new {{request_struct|name}}();
   {%- for parameter in method.parameters %}
       params.{{parameter|name}} = {{parameter|name}};
@@ -128,13 +133,17 @@ class {{interface|name}}Proxy implements bindings.ProxyBase {
       ptr = new _{{interface|name}}ProxyCalls(proxyImpl);
 
   {{interface|name}}Proxy.fromEndpoint(
-      core.MojoMessagePipeEndpoint endpoint) :
-      impl = new {{interface|name}}ProxyImpl.fromEndpoint(endpoint) {
+      core.MojoMessagePipeEndpoint endpoint,
+      {bool doListen: true, Function onClosed}) :
+      impl = new {{interface|name}}ProxyImpl.fromEndpoint(
+          endpoint, doListen: doListen, onClosed: onClosed) {
     ptr = new _{{interface|name}}ProxyCalls(impl);
   }
 
-  {{interface|name}}Proxy.fromHandle(core.MojoHandle handle) :
-      impl = new {{interface|name}}ProxyImpl.fromHandle(handle) {
+  {{interface|name}}Proxy.fromHandle(core.MojoHandle handle,
+      {bool doListen: true, Function onClosed}) :
+      impl = new {{interface|name}}ProxyImpl.fromHandle(
+          handle, doListen: doListen, onClosed: onClosed) {
     ptr = new _{{interface|name}}ProxyCalls(impl);
   }
 
@@ -152,19 +161,37 @@ class {{interface|name}}Proxy implements bindings.ProxyBase {
 
 
 class {{interface|name}}Stub extends bindings.Stub {
-  {{interface|name}} _delegate = null;
-
-  {{interface|name}}Stub.fromEndpoint(core.MojoMessagePipeEndpoint endpoint) :
-      super(endpoint);
+  {{interface|name}} _impl = null;
+
+  {{interface|name}}Stub.fromEndpoint(core.MojoMessagePipeEndpoint endpoint,
+      { {{interface|name}} impl, bool doListen: true, Function onClosed}) :
+      super.fromEndpoint(endpoint, doListen: false) {
+    assert(!doListen || (impl != null));
+    if (impl != null) {
+      this._impl = impl;
+    }
+    if (doListen) {
+      listen(onClosed: onClosed);
+    }
+  }
 
-  {{interface|name}}Stub.fromHandle(core.MojoHandle handle) :
-      super.fromHandle(handle);
+  {{interface|name}}Stub.fromHandle(core.MojoHandle handle,
+      { {{interface|name}} impl, bool doListen: true, Function onClosed}) :
+      super.fromHandle(handle, doListen: false) {
+    assert(!doListen || (impl != null));
+    if (impl != null) {
+      this._impl = impl;
+    }
+    if (doListen) {
+      listen(onClosed: onClosed);
+    }
+  }
 
   {{interface|name}}Stub.unbound() : super.unbound();
 
   static {{interface|name}}Stub newFromEndpoint(
       core.MojoMessagePipeEndpoint endpoint) =>
-      new {{interface|name}}Stub.fromEndpoint(endpoint);
+      new {{interface|name}}Stub.fromEndpoint(endpoint, doListen: false);
 
   static const String name = {{interface|name}}Name;
 
@@ -186,7 +213,7 @@ class {{interface|name}}Stub extends bindings.Stub {
 {%- endfor %}
 
   Future<bindings.Message> handleMessage(bindings.ServiceMessage message) {
-    assert(_delegate != null);
+    assert(_impl != null);
     switch (message.header.type) {
 {%- for method in interface.methods %}
 {%- set request_struct = method|struct_from_method %}
@@ -194,14 +221,14 @@ class {{interface|name}}Stub extends bindings.Stub {
         var params = {{request_struct|name}}.deserialize(
             message.payload);
 {%- if method.response_parameters == None %}
-        _delegate.{{method|name}}(
+        _impl.{{method|name}}(
           {%- for parameter in method.parameters -%}
               params.{{parameter|name}}{% if not loop.last %}, {% endif %}
           {%- endfor -%}
         );
 {%- else %}
 {%- set response_struct = method|response_struct_from_method %}
-        return _delegate.{{method|name}}(
+        return _impl.{{method|name}}(
           {%- for parameter in method.parameters -%}
               params.{{parameter|name}},
           {%- endfor -%}
@@ -224,9 +251,9 @@ class {{interface|name}}Stub extends bindings.Stub {
     return null;
   }
 
-  {{interface|name}} get delegate => _delegate;
-      set delegate({{interface|name}} d) {
-    assert(_delegate == null);
-    _delegate = d;
+  {{interface|name}} get impl => _impl;
+      set impl({{interface|name}} d) {
+    assert(_impl == null);
+    _impl = d;
   }
 }