Add interface versioning. Methods queryVersion and requireVersion.

mojo/public/js/bindings.js

 // Copyright 2014 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.
 
 define("mojo/public/js/bindings", [
   "mojo/public/js/core",
   "mojo/public/js/interface_types",
   "mojo/public/js/router",
-], function(core, types, router) {
+  "mojo/public/js/lib/control_message_proxy",
+], function(core, types, router, controlMessageProxy) {
 
   // ---------------------------------------------------------------------------
 
   function makeRequest(interfacePtr) {
     var pipe = core.createMessagePipe();
     interfacePtr.ptr.bind(new types.InterfacePtrInfo(pipe.handle0, 0));
     return new types.InterfaceRequest(pipe.handle1);
   }
 
   // ---------------------------------------------------------------------------
 
   // Operations used to setup/configure an interface pointer. Exposed as the
   // |ptr| field of generated interface pointer classes.
   // |ptrInfoOrHandle| could be omitted and passed into bind() later.
   function InterfacePtrController(interfaceType, ptrInfoOrHandle) {
     this.version = 0;
 
     this.interfaceType_ = interfaceType;
     this.router_ = null;
     this.proxy_ = null;
 
     // |router_| is lazily initialized. |handle_| is valid between bind() and
     // the initialization of |router_|.
     this.handle_ = null;
+    this.controlMessageProxy_ = new controlMessageProxy.ControlMessageProxy();
 
     if (ptrInfoOrHandle)
       this.bind(ptrInfoOrHandle);
   }
 
   InterfacePtrController.prototype.bind = function(ptrInfoOrHandle) {
     this.reset();
 
     if (ptrInfoOrHandle instanceof types.InterfacePtrInfo) {
       this.version = ptrInfoOrHandle.version;
@@ skipping 59 matching lines @@
     return this.router_.enableTestingMode();
   };
 
   InterfacePtrController.prototype.configureProxyIfNecessary_ = function() {
     if (!this.handle_)
       return;
 
     this.router_ = new router.Router(this.handle_);
     this.handle_ = null;
     this.router_ .setPayloadValidators([this.interfaceType_.validateResponse]);
+    this.controlMessageProxy_.receiver = this.router_;
 
     this.proxy_ = new this.interfaceType_.proxyClass(this.router_);
   };
 
-  // TODO(yzshen): Implement the following methods.
-  //   InterfacePtrController.prototype.queryVersion
-  //   InterfacePtrController.prototype.requireVersion
+  InterfacePtrController.prototype.queryVersion = function() {
+    this.configureProxyIfNecessary_();
+    return this.controlMessageProxy_.queryVersion().then(function(version) {
+      this.version = version;
+      return version;
+    });
+  };
+
+  InterfacePtrController.prototype.requireVersion = function(version) {
+    this.configureProxyIfNecessary_();
+
+    if (this.version >= version) {
+      return;
+    }
+    this.version = version;
+    this.controlMessageProxy_.requireVersion(version);
+  };
 
   // ---------------------------------------------------------------------------
 
   // |request| could be omitted and passed into bind() later.
   //
   // Example:
   //
   //    // FooImpl implements mojom.Foo.
   //    function FooImpl() { ... }
   //    FooImpl.prototype.fooMethod1 = function() { ... }
@@ skipping 124 matching lines @@
   var exports = {};
   exports.InterfacePtrInfo = types.InterfacePtrInfo;
   exports.InterfaceRequest = types.InterfaceRequest;
   exports.makeRequest = makeRequest;
   exports.InterfacePtrController = InterfacePtrController;
   exports.Binding = Binding;
   exports.BindingSet = BindingSet;
 
   return exports;
 });