chrome/browser/resources/print_preview/data/ticket_items/header_footer.js

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 cr.define('print_preview.ticket_items', function() {
   6   'use strict';
   7
   8   /**
   9    * Header-footer ticket item whose value is a {@code boolean} that indicates
  10    * whether the document should be printed with headers and footers.
  11    * @param {!print_preview.AppState} appState App state used to persist whether
  12    *     header-footer is enabled.
  13    * @param {!print_preview.DocumentInfo} documentInfo Information about the
  14    *     document to print.
  15    * @param {!print_preview.ticket_items.MarginsType} marginsType Ticket item
  16    *     that stores which predefined margins to print with.
  17    * @param {!print_preview.ticket_items.CustomMargins} customMargins Ticket
  18    *     item that stores custom margin values.
  19    * @constructor
  20    * @extends {print_preview.ticket_items.TicketItem}
  21    */
  22   function HeaderFooter(appState, documentInfo, marginsType, customMargins) {
  23     print_preview.ticket_items.TicketItem.call(
  24         this,
  25         appState,
  26         print_preview.AppState.Field.IS_HEADER_FOOTER_ENABLED,
  27         null /*destinationStore*/,
  28         documentInfo);
  29
  30     /**
  31      * Ticket item that stores which predefined margins to print with.
  32      * @type {!print_preview.ticket_items.MarginsType}
  33      * @private
  34      */
  35     this.marginsType_ = marginsType;
  36
  37     /**
  38      * Ticket item that stores custom margin values.
  39      * @type {!print_preview.ticket_items.CustomMargins}
  40      * @private
  41      */
  42     this.customMargins_ = customMargins;
  43
  44     this.addEventListeners_();
  45   };
  46
  47   HeaderFooter.prototype = {
  48     __proto__: print_preview.ticket_items.TicketItem.prototype,
  49
  50     /** @override */
  51     wouldValueBeValid: function(value) {
  52       return true;
  53     },
  54
  55     /** @override */
  56     isCapabilityAvailable: function() {
  57       if (!this.getDocumentInfoInternal().isModifiable) {
  58         return false;
  59       } else if (this.marginsType_.getValue() ==
  60           print_preview.ticket_items.MarginsType.Value.NO_MARGINS) {
  61         return false;
  62       } else if (this.marginsType_.getValue() ==
  63           print_preview.ticket_items.MarginsType.Value.MINIMUM) {
  64         return true;
  65       }
  66       var margins;
  67       if (this.marginsType_.getValue() ==
  68           print_preview.ticket_items.MarginsType.Value.CUSTOM) {
  69         if (!this.customMargins_.isValid()) {
  70           return false;
  71         }
  72         margins = this.customMargins_.getValue();
  73       } else {
  74         margins = this.getDocumentInfoInternal().margins;
  75       }
  76       var orientEnum = print_preview.ticket_items.CustomMargins.Orientation;
  77       return margins == null ||
  78              margins.get(orientEnum.TOP) > 0 ||
  79              margins.get(orientEnum.BOTTOM) > 0;
  80     },
  81
  82     /** @override */
  83     getDefaultValueInternal: function() {
  84       return true;
  85     },
  86
  87     /** @override */
  88     getCapabilityNotAvailableValueInternal: function() {
  89       return false;
  90     },
  91
  92     /**
  93      * Adds CHANGE listeners to dependent ticket items.
  94      * @private
  95      */
  96     addEventListeners_: function() {
  97       this.getTrackerInternal().add(
  98           this.marginsType_,
  99           print_preview.ticket_items.TicketItem.EventType.CHANGE,
 100           this.dispatchChangeEventInternal.bind(this));
 101       this.getTrackerInternal().add(
 102           this.customMargins_,
 103           print_preview.ticket_items.TicketItem.EventType.CHANGE,
 104           this.dispatchChangeEventInternal.bind(this));
 105     }
 106   };
 107
 108   // Export
 109   return {
 110     HeaderFooter: HeaderFooter
 111   };
 112 });