DevTools: Introduce Target class which holds connection & models

Source/devtools/front_end/Target.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.
+ */
+
+/**
+ * @constructor
+ * @extends {WebInspector.Object}
+ * @param {!InspectorBackendClass.Connection} connection
+ */
+WebInspector.Target = function(connection)
+{
+    WebInspector.Object.call(this);
+    this._connection = connection;
+    this.canScreenCast = false;
+    this.canInspectWorkers = false;
+
+    connection.agent("Page").canScreencast(this._initializeCapability.bind(this, "canScreencast", null));
+    connection.agent("Worker").canInspectWorkers(this._initializeCapability.bind(this, "canInspectWorkers", this._loadedWithCapabilities.bind(this)));
+
+    // In case of loading as a web page with no bindings / harness, kick off initialization manually.
+    if (InspectorFrontendHost.isStub) {
+        // give a chance to add listeners of WebInspector.Target.Events.TargetIsReady
+        setTimeout(this._loadedWithCapabilities.bind(this), 0);
+    }
+}
+
+WebInspector.Target.Events = {
+    TargetIsReady: "TargetIsReady"
+}
+
+WebInspector.Target.prototype = {
+
+    _initializeCapability: function(name, callback, error, result)
+    {
+        this[name] = result;
+        if (callback)
+            callback();
+    },
+
+    _loadedWithCapabilities: function()
+    {
+        this.consoleModel = new WebInspector.ConsoleModel(this);
+        this.networkManager = new WebInspector.NetworkManager(this);
+        this.resourceTreeModel = new WebInspector.ResourceTreeModel(this);
+        this.debuggerModel = new WebInspector.DebuggerModel();
+        this.runtimeModel = new WebInspector.RuntimeModel(this);
+
+        this.dispatchEventToListeners(WebInspector.Target.Events.TargetIsReady);
+    },
+
+    /**
+     * @param {string} domain
+     * @param {!Object} dispatcher
+     */
+    registerDispatcher: function(domain, dispatcher)
+    {
+        this._connection.registerDispatcher(domain, dispatcher);
+    },
+
+    /**
+     * @param {string} domain
+     * @return {!InspectorBackendClass.AgentPrototype}
+     */
+    agent: function(domain)
+    {
+        return this._connection.agent(domain);
+    },
+
+    __proto__: WebInspector.Object.prototype
+}
+
+/**
+ * @constructor
+ * @extends {WebInspector.Object}
+ */
+WebInspector.TargetManager = function()
+{
+    /** @type {!Array.<!WebInspector.Target>} */
+    this._targets = [];
+}
+
+WebInspector.TargetManager.Events = {

[vsevik, 2014/03/05 12:34:49]

Let's add this event once it is at least dispatched somewhere.

[sergeyv, 2014/03/05 15:02:51]

Done.

+    TargetSwitched: "TargetSwitched"
+}
+
+WebInspector.TargetManager.prototype = {
+
+    /**
+     * @param {!InspectorBackendClass.Connection} connection
+     * @return {!WebInspector.Target}
+     */
+    newConnectionAvailable: function(connection)

[vsevik, 2014/03/05 12:34:49]

How about createTarget(connection, callback) where callback is function(Target)
that is called once the target is ready?

[sergeyv, 2014/03/05 15:02:51]

Done.

+    {
+        var newTarget = new WebInspector.Target(connection);
+        this._targets.push(newTarget);
+        return newTarget;
+    },
+
+    __proto__: WebInspector.Object.prototype
+}