MD Settings: Network: Check managed properties for known networks menu

chrome/browser/resources/settings/internet_page/internet_known_networks_page.js

 // Copyright 2015 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.
 
 /**
  * @fileoverview
  * 'settings-internet-known-networks' is the settings subpage listing the
  * known networks for a type (currently always WiFi).
  */
 Polymer({
   is: 'settings-internet-known-networks-page',
 
+  behaviors: [CrPolicyNetworkBehavior],
+
   properties: {
     /**
      * The type of networks to list.
      * @type {chrome.networkingPrivate.NetworkType}
      */
     networkType: {
       type: String,
       observer: 'networkTypeChanged_',
     },
 
     /**
      * Interface for networkingPrivate calls, passed from internet_page.
      * @type {NetworkingPrivate}
      */
     networkingPrivate: Object,
 
     /**
      * List of all network state data for the network type.
      * @private {!Array<!CrOnc.NetworkStateProperties>}
      */
     networkStateList_: {
       type: Array,
       value: function() {
         return [];
       }
     },
+
+    /** @private */
+    showAddPreferred_: Boolean,
+
+    /** @private */
+    showRemovePreferred_: Boolean,
   },
 
   /** @private {string} */
   selectedGuid_: '',
 
-  /** @private {boolean} */
-  selectedIsPreferred_: false,
-
   /**
    * Listener function for chrome.networkingPrivate.onNetworksChanged event.
    * @type {function(!Array<string>)}
    * @private
    */
   networksChangedListener_: function() {},
 
   /** @override */
   attached: function() {
     this.networksChangedListener_ = this.onNetworksChangedEvent_.bind(this);
@@ skipping 80 matching lines @@
 
   /**
    * @param {!Event} event
    * @private
    */
   onMenuButtonTap_: function(event) {
     var button = /** @type {!HTMLElement} */ (event.target);
     this.selectedGuid_ =
         /** @type {!{model: !{item: !CrOnc.NetworkStateProperties}}} */ (event)
             .model.item.GUID;
-    this.selectedIsPreferred_ = button.hasAttribute('preferred');
-    /** @type {!CrActionMenuElement} */ (this.$.dotsMenu).showAt(button);
+    // We need to make a round trip to Chrome in order to retrieve the managed
+    // properties for the network. The delay is not noticeable (~5ms) and is
+    // preferable to initiating a query for every known network at load time.
+    this.networkingPrivate.getManagedProperties(
+        this.selectedGuid_, function(properties) {
+          var preferred = button.hasAttribute('preferred');
+          if (this.isNetworkPolicyEnforced(properties.Priority)) {
+            this.showAddPreferred_ = false;
+            this.showRemovePreferred_ = false;
+          } else {
+            this.showAddPreferred_ = !preferred;
+            this.showRemovePreferred_ = preferred;
+          }
+          /** @type {!CrActionMenuElement} */ (this.$.dotsMenu).showAt(button);
+        }.bind(this));
     event.stopPropagation();
   },
 
   /** @private */
   onRemovePreferredTap_: function() {
     this.networkingPrivate.setProperties(this.selectedGuid_, {Priority: 0});
     /** @type {!CrActionMenuElement} */ (this.$.dotsMenu).close();
   },
 
   /** @private */
@@ skipping 15 matching lines @@
    * @private
    */
   fireShowDetails_: function(event) {
     var state =
         /** @type {!{model: !{item: !CrOnc.NetworkStateProperties}}} */ (event)
             .model.item;
     this.fire('show-detail', state);
     event.stopPropagation();
   },
 });