List printers managed by extensions in print preview

chrome/browser/resources/print_preview/data/app_state.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';
 
   /**
    * Object used to get and persist the print preview application state.
    * @constructor
@@ skipping 21 matching lines @@
    * Enumeration of field names for serialized app state.
    * @enum {string}
    */
   AppState.Field = {
     VERSION: 'version',
     SELECTED_DESTINATION_ID: 'selectedDestinationId',
     SELECTED_DESTINATION_ACCOUNT: 'selectedDestinationAccount',
     SELECTED_DESTINATION_ORIGIN: 'selectedDestinationOrigin',
     SELECTED_DESTINATION_CAPABILITIES: 'selectedDestinationCapabilities',
     SELECTED_DESTINATION_NAME: 'selectedDestinationName',
+    SELECTED_DESTINATION_EXTENSION_ID: 'selectedDestinationExtensionId',
     IS_GCP_PROMO_DISMISSED: 'isGcpPromoDismissed',
     DPI: 'dpi',
     MEDIA_SIZE: 'mediaSize',
     MARGINS_TYPE: 'marginsType',
     CUSTOM_MARGINS: 'customMargins',
     IS_COLOR_ENABLED: 'isColorEnabled',
     IS_DUPLEX_ENABLED: 'isDuplexEnabled',
     IS_HEADER_FOOTER_ENABLED: 'isHeaderFooterEnabled',
     IS_LANDSCAPE_ENABLED: 'isLandscapeEnabled',
     IS_COLLATE_ENABLED: 'isCollateEnabled',
@@ skipping 40 matching lines @@
     /** @return {?print_preview.Cdd} CDD of the selected destination. */
     get selectedDestinationCapabilities() {
       return this.state_[AppState.Field.SELECTED_DESTINATION_CAPABILITIES];
     },
 
     /** @return {?string} Name of the selected destination. */
     get selectedDestinationName() {
       return this.state_[AppState.Field.SELECTED_DESTINATION_NAME];
     },
 
+    /**
+     * @return {?string} Extension ID associated with the selected destination.
+     */
+    get selectedDestinationExtensionId() {
+      return this.state_[AppState.Field.SELECTED_DESTINATION_EXTENSION_ID];
+    },
+
     /** @return {boolean} Whether the GCP promotion has been dismissed. */
     get isGcpPromoDismissed() {
       return this.state_[AppState.Field.IS_GCP_PROMO_DISMISSED];
     },
 
     /**
      * @param {!print_preview.AppState.Field} field App state field to check if
      *     set.
      * @return {boolean} Whether a field has been set in the app state.
      */
@@ skipping 74 matching lines @@
      */
     persistSelectedDestination: function(dest) {
       if (!this.isInitialized_)
         return;
       this.state_[AppState.Field.SELECTED_DESTINATION_ID] = dest.id;
       this.state_[AppState.Field.SELECTED_DESTINATION_ACCOUNT] = dest.account;
       this.state_[AppState.Field.SELECTED_DESTINATION_ORIGIN] = dest.origin;
       this.state_[AppState.Field.SELECTED_DESTINATION_CAPABILITIES] =
           dest.capabilities;
       this.state_[AppState.Field.SELECTED_DESTINATION_NAME] = dest.displayName;
+      this.state_[AppState.Field.SELECTED_DESTINATION_EXTENSION_ID] =
+          dest.extensionId;
       this.persist_();
     },
 
     /**
      * Persists whether the GCP promotion has been dismissed.
      * @param {boolean} isGcpPromoDismissed Whether the GCP promotion has been
      *     dismissed.
      */
     persistIsGcpPromoDismissed: function(isGcpPromoDismissed) {
       if (!this.isInitialized_)
         return;
       this.state_[AppState.Field.IS_GCP_PROMO_DISMISSED] = isGcpPromoDismissed;
       this.persist_();
     },
 
     /**
      * Calls into the native layer to persist the application state.
      * @private
      */
     persist_: function() {
       chrome.send(AppState.NATIVE_FUNCTION_NAME_,
                   [JSON.stringify(this.state_)]);
     }
   };
 
   return {
     AppState: AppState
   };
 });