Show destination offline status in the print preview.

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

Index: chrome/browser/resources/print_preview/data/destination.js
diff --git a/chrome/browser/resources/print_preview/data/destination.js b/chrome/browser/resources/print_preview/data/destination.js
index f97266428f915f666c751461fd5791208681cb13..e37427ce3cc5d757c585ad99476143acb836a114 100644
--- a/chrome/browser/resources/print_preview/data/destination.js
+++ b/chrome/browser/resources/print_preview/data/destination.js
@@ -252,6 +252,7 @@ cr.define('print_preview', function() {
      */
     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(
@@ -302,6 +303,32 @@ cr.define('print_preview', function() {
       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.