Show destination offline status in the print preview.

chrome/browser/resources/print_preview/data/destination.js

 // Copyright (c) 2012 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.
 
 cr.define('print_preview', function() {
   'use strict';
 
   /**
    * Print destination data object that holds data for both local and cloud
    * destinations.
@@ skipping 234 matching lines @@
     get isPrivet() {
       return this.origin_ == Destination.Origin.PRIVET;
     },
 
     /**
      * @return {string} The location of the destination, or an empty string if
      *     the location is unknown.
      */
     get location() {
       if (this.location_ == null) {
+        this.location_ = '';

[Vitaly Buka (NO REVIEWS), 2014/02/12 00:39:19]

Why do we initialize this in null in first place?

[Toscano, 2014/02/12 22:10:29]

Agreed, I think that would be simpler.

[Aleksey Shlyapnikov, 2014/02/13 19:10:18]

Null indicates that we have not tried to look it up yet. Empty string means that
there's no location specified for this printer and we won't run this for loop
next time get location is called.

         for (var tag, i = 0; tag = this.tags_[i]; i++) {
           if (tag.indexOf(Destination.LOCATION_TAG_PREFIX) == 0) {
             this.location_ = tag.substring(
                 Destination.LOCATION_TAG_PREFIX.length) || '';
             break;
           }
         }
       }
       return this.location_;
     },
@@ skipping 30 matching lines @@
     },
 
     /**
      * @param {!print_preview.Destination.ConnectionStatus} status Connection
      *     status of the print destination.
      */
     set connectionStatus(status) {
       this.connectionStatus_ = status;
     },
 
+    /** @return {boolean} Whether the destination is considered offline. */
+    get isOffline() {
+      return arrayContains([print_preview.Destination.ConnectionStatus.OFFLINE,
+                            print_preview.Destination.ConnectionStatus.DORMANT],
+                            this.connectionStatus_);
+    },
+
+    /** @return {string} Human readable status for offline destination. */
+    get offlineStatusText() {
+      if (!this.isOffline) {
+        return '';
+      }
+      var offlineDurationMs = Date.now() - this.lastAccessTime_;
+      var offlineMessageId;
+      if (offlineDurationMs > 31622400000.0) {  // One year.
+        offlineMessageId = 'offlineForYear';
+      } else if (offlineDurationMs > 2678400000.0) {  // One month.
+        offlineMessageId = 'offlineForMonth';
+      } else if (offlineDurationMs > 604800000.0) {  // One week.
+        offlineMessageId = 'offlineForWeek';
+      } else {
+        offlineMessageId = 'offline';
+      }
+      return localStrings.getString(offlineMessageId);
+    },
+
     /**
      * @return {number} Number of milliseconds since the epoch when the printer
      *     was last accessed.
      */
     get lastAccessTime() {
       return this.lastAccessTime_;
     },
 
     /** @return {string} Relative URL of the destination's icon. */
     get iconUrl() {
@@ skipping 72 matching lines @@
    * }}
    */
   var Cdd = Object;
 
   // Export
   return {
     Destination: Destination,
     Cdd: Cdd
   };
 });