[Mobile] Add classes to body

Add classes describing device characteristics to the
body of the current document at start-up. Refactor
device matchers out of the mct-device directive for
reuse and consistency here.

https://github.com/nasa/openmctweb/issues/169

platform/commonUI/mobile/src/DeviceClassifier.js

@@ -0,0 +1,58 @@
+/*****************************************************************************
+ * Open MCT Web, Copyright (c) 2014-2015, United States Government
+ * as represented by the Administrator of the National Aeronautics and Space
+ * Administration. All rights reserved.
+ *
+ * Open MCT Web is licensed under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ * Open MCT Web includes source code licensed under additional open source
+ * licenses. See the Open Source Licenses file (LICENSES.md) included with
+ * this source code distribution or the Licensing information page available
+ * at runtime from the About dialog for additional information.
+ *****************************************************************************/
+/*global define,Promise*/
+
+define(
+    ['./DeviceMatchers'],
+    function (DeviceMatchers) {
+        'use strict';
+
+        /**
+         * Runs at application startup and adds a subset of the following
+         * CSS classes to the body of the document, depending on device
+         * attributes:
+         *
+         * * `mobile`: Phones or tablets.
+         * * `phone`: Phones specifically.
+         * * `tablet`: Tablets specifically.
+         * * `desktop`: Non-mobile devices.
+         * * `portrait`: Devices in a portrait-style orientation.
+         * * `landscape`: Devices in a landscape-style orientation.
+         *
+         * @param {platform/commonUI/mobile.AgentService} agentService
+         *        the service used to examine the user agent
+         * @param $document Angular's jqLite-wrapped document element
+         * @constructor
+         */
+        function MobileClassifier(agentService, $document) {
+            var body = $document.find('body');
+            Object.keys(DeviceMatchers).forEach(function (key) {
+                if (DeviceMatchers[key](agentService)) {
+                    body.addClass(key);
+                }
+            });
+        }
+
+        return MobileClassifier;
+
+    }
+);