Print Preview: Fix data/ errors

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.exportPath('print_preview');
+
+/**
+ * Enumeration of field names for serialized app state.
+ * @enum {string}
+ */
+print_preview.AppStateField = {
+  VERSION: 'version',
+  RECENT_DESTINATIONS: 'recentDestinations',
+  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',
+  IS_FIT_TO_PAGE_ENABLED: 'isFitToPageEnabled',
+  IS_CSS_BACKGROUND_ENABLED: 'isCssBackgroundEnabled',
+  SCALING: 'scaling',
+  VENDOR_OPTIONS: 'vendorOptions'
+};
+
+/**
+ * Object used to represent a recent destination in the app state.
+ * @constructor
+ * @struct
+ */
+function RecentDestination(destination) {
+  /**
+   * ID of the RecentDestination.
+   * @type {string}
+   */
+  this.id = destination.id;
+
+  /**
+   * Origin of the RecentDestination.
+   * @type {string}
+   */
+  this.origin = destination.origin;
+
+  /**
+   * Account the RecentDestination is registered for.
+   * @type {string}
+   */
+  this.account = destination.account || '';
+
+  /**
+   * CDD of the RecentDestination.
+   * @type {print_preview.Cdd}
+   */
+  this.capabilities = destination.capabilities;
+
+  /**
+   * Name of the RecentDestination.
+   * @type {string}
+   */
+  this.name = destination.name || '';
+
+  /**
+   * Extension ID associated with the RecentDestination.
+   * @type {string}
+   */
+  this.extensionId = destination.extension_id || '';
+
+  /**
+   * Extension name associated with the RecentDestination.
+   * @type {string}
+   */
+  this.extensionName = destination.extension_name || '';
+}
+
 cr.define('print_preview', function() {
   'use strict';
 
   /**
-   * Object used to represent a recent destination in the app state.
-   * @constructor
-   */
-  function RecentDestination(destination) {
-    /**
-     * ID of the RecentDestination.
-     * @type {string}
-     */
-    this.id = destination.id;
-
-    /**
-     * Origin of the RecentDestination.
-     * @type {string}
-     */
-    this.origin = destination.origin;
-
-    /**
-     * Account the RecentDestination is registered for.
-     * @type {string}
-     */
-    this.account = destination.account || '';
-
-    /**
-     * CDD of the RecentDestination.
-     * @type {print_preview.Cdd}
-     */
-    this.capabilities = destination.capabilities;
-
-    /**
-     * Name of the RecentDestination.
-     * @type {string}
-     */
-    this.name = destination.name || '';
-
-    /**
-     * Extension ID associated with the RecentDestination.
-     * @type {string}
-     */
-    this.extensionId = destination.extension_id || '';
-
-    /**
-     * Extension name associated with the RecentDestination.
-     * @type {string}
-     */
-    this.extensionName = destination.extension_name || '';
-  };
-
-  /**
    * Object used to get and persist the print preview application state.
    * @constructor
    */
   function AppState() {
     /**
      * Internal representation of application state.
      * @type {Object}
      * @private
      */
     this.state_ = {};
-    this.state_[AppState.Field.VERSION] = AppState.VERSION_;
-    this.state_[AppState.Field.IS_GCP_PROMO_DISMISSED] = true;
-    this.state_[AppState.Field.RECENT_DESTINATIONS] = [];
+    this.state_[print_preview.AppStateField.VERSION] = AppState.VERSION_;
+    this.state_[print_preview.AppStateField.IS_GCP_PROMO_DISMISSED] = true;
+    this.state_[print_preview.AppStateField.RECENT_DESTINATIONS] = [];
 
     /**
      * Whether the app state has been initialized. The app state will ignore all
      * writes until it has been initialized.
      * @type {boolean}
      * @private
      */
     this.isInitialized_ = false;
-  };
+  }
 
   /**
    * Number of recent print destinations to store across browser sessions.
    * @const {number}
    */
   AppState.NUM_DESTINATIONS_ = 3;
 
-
-  /**
-   * Enumeration of field names for serialized app state.
-   * @enum {string}
-   */
-  AppState.Field = {
-    VERSION: 'version',
-    RECENT_DESTINATIONS: 'recentDestinations',
-    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',
-    IS_FIT_TO_PAGE_ENABLED: 'isFitToPageEnabled',
-    IS_CSS_BACKGROUND_ENABLED: 'isCssBackgroundEnabled',
-    SCALING: 'scaling',
-    VENDOR_OPTIONS: 'vendorOptions'
-  };
-
   /**
    * Current version of the app state. This value helps to understand how to
    * parse earlier versions of the app state.
    * @type {number}
    * @const
    * @private
    */
   AppState.VERSION_ = 2;
 
   /**
    * Name of C++ layer function to persist app state.
    * @type {string}
    * @const
    * @private
    */
   AppState.NATIVE_FUNCTION_NAME_ = 'saveAppState';
 
   AppState.prototype = {
     /**
-     * @return {?RecentDestination} The most recent destination, which is
-     *     currently the selected destination.
+     * @return {?RecentDestination} The most recent destination,
+     *     which is currently the selected destination.
      */
     get selectedDestination() {
-      return (this.state_[AppState.Field.RECENT_DESTINATIONS].length > 0) ?
-          this.state_[AppState.Field.RECENT_DESTINATIONS][0] : null;
+      return  (this.state_[print_preview.AppStateField.RECENT_DESTINATIONS].
+                 length > 0) ?
+          this.state_[print_preview.AppStateField.RECENT_DESTINATIONS][0] :
+          null;
     },
 
     /**
      * @return {boolean} Whether the selected destination is valid.
      */
     isSelectedDestinationValid: function() {
-      return this.selectedDestination &&
-             this.selectedDestination.id &&
-             this.selectedDestination.origin;
+      return !!this.selectedDestination &&
+             !!this.selectedDestination.id &&
+             !!this.selectedDestination.origin;
     },
 
     /**
-     * @return {?Array<!RecentDestination>} The AppState.NUM_DESTINATIONS_ most
-     *     recent destinations.
+     * @return {?Array<!RecentDestination>} The
+     *     AppState.NUM_DESTINATIONS_ most recent destinations.
      */
     get recentDestinations() {
-      return this.state_[AppState.Field.RECENT_DESTINATIONS];
+      return this.state_[print_preview.AppStateField.RECENT_DESTINATIONS];
     },
 
     /** @return {boolean} Whether the GCP promotion has been dismissed. */
     get isGcpPromoDismissed() {
-      return this.state_[AppState.Field.IS_GCP_PROMO_DISMISSED];
+      return this.state_[print_preview.AppStateField.IS_GCP_PROMO_DISMISSED];
     },
 
     /**
-     * @param {!print_preview.AppState.Field} field App state field to check if
+     * @param {!print_preview.AppStateField} field App state field to check if
      *     set.
      * @return {boolean} Whether a field has been set in the app state.
      */
     hasField: function(field) {
       return this.state_.hasOwnProperty(field);
     },
 
     /**
-     * @param {!print_preview.AppState.Field} field App state field to get.
+     * @param {!print_preview.AppStateField} field App state field to get.
      * @return {?} Value of the app state field.
      */
     getField: function(field) {
-      if (field == AppState.Field.CUSTOM_MARGINS) {
+      if (field == print_preview.AppStateField.CUSTOM_MARGINS) {
         return this.state_[field] ?
             print_preview.Margins.parse(this.state_[field]) : null;
       } else {
         return this.state_[field];
       }
     },
 
     /**
      * Initializes the app state from a serialized string returned by the native
      * layer.
      * @param {?string} serializedAppStateStr Serialized string representation
      *     of the app state.
      */
     init: function(serializedAppStateStr) {
       if (serializedAppStateStr) {
         try {
           var state = JSON.parse(serializedAppStateStr);
-          if (state[AppState.Field.VERSION] == AppState.VERSION_) {
-            this.state_ = state;
+          if (state[print_preview.AppStateField.VERSION] == AppState.VERSION_) {
+            this.state_ = /** @type {Object} */(state);
           }
         } catch(e) {
           console.error('Unable to parse state: ' + e);
           // Proceed with default state.
         }
       } else {
         // Set some state defaults.
-        this.state_[AppState.Field.IS_GCP_PROMO_DISMISSED] = false;
-        this.state_[AppState.Field.RECENT_DESTINATIONS] = [];
+        this.state_[print_preview.AppStateField.IS_GCP_PROMO_DISMISSED] = false;
+        this.state_[print_preview.AppStateField.RECENT_DESTINATIONS] = [];
       }
-      if (!this.state_[AppState.Field.RECENT_DESTINATIONS]) {
-        this.state_[AppState.Field.RECENT_DESTINATIONS] = [];
-      } else if (!(this.state_[AppState.Field.RECENT_DESTINATIONS] instanceof
-            Array)) {
-        var tmp = this.state_[AppState.Field.RECENT_DESTINATIONS];
-        this.state_[AppState.Field.RECENT_DESTINATIONS] = [tmp];
-      } else if (!this.state_[AppState.Field.RECENT_DESTINATIONS][0] ||
-          !this.state_[AppState.Field.RECENT_DESTINATIONS][0].id) {
+      if (!this.state_[print_preview.AppStateField.RECENT_DESTINATIONS]) {
+        this.state_[print_preview.AppStateField.RECENT_DESTINATIONS] = [];
+      } else if (!(this.state_[print_preview.AppStateField.RECENT_DESTINATIONS]
+                   instanceof Array)) {
+        var tmp = this.state_[print_preview.AppStateField.RECENT_DESTINATIONS];
+        this.state_[print_preview.AppStateField.RECENT_DESTINATIONS] = [tmp];
+      } else if (!this.state_[
+          print_preview.AppStateField.RECENT_DESTINATIONS][0] ||
+          !this.state_[print_preview.AppStateField.RECENT_DESTINATIONS][0].id) {
         // read in incorrectly
-        this.state_[AppState.Field.RECENT_DESTINATIONS] = [];
-      } else if (this.state_[AppState.Field.RECENT_DESTINATIONS].length >
-          AppState.NUM_DESTINATIONS_) {
-        this.state_[AppState.Field.RECENT_DESTINATIONS].length =
+        this.state_[print_preview.AppStateField.RECENT_DESTINATIONS] = [];
+      } else if (this.state_[print_preview.AppStateField.RECENT_DESTINATIONS].
+                 length > AppState.NUM_DESTINATIONS_) {
+        this.state_[print_preview.AppStateField.RECENT_DESTINATIONS].length =
             AppState.NUM_DESTINATIONS_;
       }
     },
 
     /**
      * Sets to initialized state. Now object will accept persist requests.
      */
     setInitialized: function() {
       this.isInitialized_ = true;
     },
 
     /**
      * Persists the given value for the given field.
-     * @param {!print_preview.AppState.Field} field Field to persist.
+     * @param {!print_preview.AppStateField} field Field to persist.
      * @param {?} value Value of field to persist.
      */
     persistField: function(field, value) {
       if (!this.isInitialized_)
         return;
-      if (field == AppState.Field.CUSTOM_MARGINS) {
+      if (field == print_preview.AppStateField.CUSTOM_MARGINS) {
         this.state_[field] = value ? value.serialize() : null;
       } else {
         this.state_[field] = value;
       }
       this.persist_();
     },
 
     /**
      * Persists the selected destination.
      * @param {!print_preview.Destination} dest Destination to persist.
      */
     persistSelectedDestination: function(dest) {
       if (!this.isInitialized_)
         return;
 
       // Determine if this destination is already in the recent destinations,
       // and where in the array it is located.
       var newDestination = new RecentDestination(dest);
       var indexFound = this.state_[
-          AppState.Field.RECENT_DESTINATIONS].findIndex(function(recent) {
-            return (newDestination.id == recent.id &&
-                    newDestination.origin == recent.origin);
-          });
+          print_preview.AppStateField.RECENT_DESTINATIONS].findIndex(
+              function(recent) {
+                return (newDestination.id == recent.id &&
+                        newDestination.origin == recent.origin);
+              });
 
       // No change
       if (indexFound == 0) {
         this.persist_();
         return;
       }
 
       // Shift the array so that the nth most recent destination is located at
       // index n.
       if (indexFound == -1 &&
-          this.state_[AppState.Field.RECENT_DESTINATIONS].length ==
+          this.state_[print_preview.AppStateField.RECENT_DESTINATIONS].length ==
           AppState.NUM_DESTINATIONS_) {
         indexFound = AppState.NUM_DESTINATIONS_ - 1;
       }
       if (indexFound != -1)
-        this.state_[AppState.Field.RECENT_DESTINATIONS].splice(indexFound, 1);
+        this.state_[print_preview.AppStateField.RECENT_DESTINATIONS].splice(
+            indexFound, 1);
 
       // Add the most recent destination
-      this.state_[AppState.Field.RECENT_DESTINATIONS].splice(
+      this.state_[print_preview.AppStateField.RECENT_DESTINATIONS].splice(
           0, 0, newDestination);
 
       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.state_[print_preview.AppStateField.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
   };
 });