Initial mojo spy skeleton based on tvcm

mojo/spy/ui/spy_shell.js

Index: mojo/spy/ui/spy_shell.js
diff --git a/mojo/spy/ui/spy_shell.js b/mojo/spy/ui/spy_shell.js
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+++ b/mojo/spy/ui/spy_shell.js
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+// Copyright (c) 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.
+
+'use strict';
+
+tvcm.require('ui.spy');
+tvcm.require('tvcm.ui');
+tvcm.require('tvcm.ui.dom_helpers');
+tvcm.requireTemplate('ui.spy_shell');
+
+tvcm.exportTo('ui', function() {
+  /**
+   * @constructor
+   */
+  var SpyShell = tvcm.ui.define('x-spy-shell');
+
+  SpyShell.prototype = {
+    __proto__: HTMLUnknownElement.prototype,
+
+    decorate: function(socketURL) {
+      var node = tvcm.instantiateTemplate('#x-spy-shell-template');
+      this.appendChild(node);
+
+      this.socketURL_ = socketURL;
+      this.conn_ = undefined;
+
+      this.statusEl_ = this.querySelector('#status');
+      this.statusEl_.textContent = 'Not connected';
+
+      this.spy_ = this.querySelector('x-spy');
+      tvcm.ui.decorate(this.spy_, ui.Spy);
+
+      this.openConnection_();
+    },
+
+    get socketURL() {
+      return this.socketURL_;
+    },
+
+    openConnection_: function() {
+      if (!(this.conn_ == undefined ||
+            this.conn_.readyState === undefined ||
+            conn.readyState > 1)) {
+        return;
+      }
+
+      this.conn_ = new WebSocket(this.socketURL_);
+      this.conn_.onopen = function() {
+        this.statusEl_.textContent = 'connected at ' + this.socketURL_;
+        this.spy_.connection = this.conn_;
+      }.bind(this);
+
+      this.conn_.onclose = function(event) {
+        this.statusEl_.textContent = 'connection closed';
+        this.spy_.connection = undefined;
+      }.bind(this);
+      this.conn_.onerror = function(event) {
+        this.statusEl_.innerHTML = 'got error';
+      }.bind(this);
+    }
+
+  };
+
+  return {
+    SpyShell: SpyShell
+  };
+});