DevTools: Decouple shortcuts from actions, introduce shortcut contexts

Source/devtools/front_end/ActionRegistry.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
+ */
+WebInspector.ActionRegistry = function()
+{
+    /** @type {!StringMap.<!WebInspector.ModuleManager.Extension>} */
+    this._actionsById = new StringMap();
+    this._registerActions();
+}
+
+WebInspector.ActionRegistry.prototype = {
+    _registerActions: function()
+    {
+        WebInspector.moduleManager.extensions(WebInspector.ActionDelegate).forEach(registerExtension, this);
+
+        /**
+         * @param {!WebInspector.ModuleManager.Extension} extension
+         * @this {WebInspector.ActionRegistry}
+         */
+        function registerExtension(extension)
+        {
+            var actionId = extension.descriptor()["actionId"];
+            console.assert(actionId);
+            console.assert(!this._actionsById.get(actionId));
+            this._actionsById.put(actionId, extension);
+        }
+    },
+
+    /**
+     * @param {string} actionId
+     * @param {!Event} event
+     * @return {boolean}
+     */
+    execute: function(actionId, event)
+    {
+        var extension = this._actionsById.get(actionId);
+        console.assert(extension, "No action found for actionId '" + actionId + "'");
+        return extension.instance().handleAction(WebInspector.context, event);
+    }
+}
+
+/**
+ * @interface
+ */
+WebInspector.ActionDelegate = function()
+{
+}
+
+WebInspector.ActionDelegate.prototype = {
+    /**
+     * @param {!WebInspector.Context} context
+     * @param {!Event} event
+     * @return {boolean}
+     */
+    handleAction: function(context, event) {}
+}
+
+/** @type {!WebInspector.ActionRegistry} */
+WebInspector.actionRegistry;