chrome/browser/resources/print_preview/data/ticket_items/landscape.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    * Landscape ticket item whose value is a {@code boolean} that indicates
  10    * whether the document should be printed in landscape orientation.
  11    * @param {!print_preview.AppState} appState App state object used to persist
  12    *     ticket item values.
  13    * @param {!print_preview.DestinationStore} destinationStore Destination store
  14    *     used to determine the default landscape value and if landscape
  15    *     printing is available.
  16    * @param {!print_preview.DocumentInfo} documentInfo Information about the
  17    *     document to print.
  18    * @param {!print_preview.ticket_items.MarginsType} marginsType Reset when
  19    *     landscape value changes.
  20    * @param {!print_preview.ticket_items.CustomMargins} customMargins Reset when
  21    *     landscape value changes.
  22    * @constructor
  23    * @extends {print_preview.ticket_items.TicketItem}
  24    */
  25   function Landscape(appState, destinationStore, documentInfo, marginsType,
  26                      customMargins) {
  27     print_preview.ticket_items.TicketItem.call(
  28         this,
  29         appState,
  30         print_preview.AppState.Field.IS_LANDSCAPE_ENABLED,
  31         destinationStore,
  32         documentInfo);
  33
  34     /**
  35      * Margins ticket item. Reset when landscape ticket item changes.
  36      * @type {!print_preview.ticket_items.MarginsType}
  37      * @private
  38      */
  39     this.marginsType_ = marginsType;
  40
  41     /**
  42      * Custom margins ticket item. Reset when landscape ticket item changes.
  43      * @type {!print_preview.ticket_items.CustomMargins}
  44      * @private
  45      */
  46     this.customMargins_ = customMargins;
  47   };
  48
  49   Landscape.prototype = {
  50     __proto__: print_preview.ticket_items.TicketItem.prototype,
  51
  52     /** @override */
  53     wouldValueBeValid: function(value) {
  54       return true;
  55     },
  56
  57     /** @override */
  58     isCapabilityAvailable: function() {
  59       var cap = this.getPageOrientationCapability_();
  60       if (!cap) {
  61         return false;
  62       }
  63       var hasAutoOrPortraitOption = false;
  64       var hasLandscapeOption = false;
  65       cap.option.forEach(function(option) {
  66         hasAutoOrPortraitOption = hasAutoOrPortraitOption ||
  67             option.type == 'AUTO' ||
  68             option.type == 'PORTRAIT';
  69         hasLandscapeOption = hasLandscapeOption || option.type == 'LANDSCAPE';
  70       });
  71       // TODO(rltoscano): Technically, the print destination can still change
  72       // the orientation of the print out (at least for cloud printers) if the
  73       // document is not modifiable. But the preview wouldn't update in this
  74       // case so it would be a bad user experience.
  75       return this.getDocumentInfoInternal().isModifiable &&
  76           !this.getDocumentInfoInternal().hasCssMediaStyles &&
  77           hasAutoOrPortraitOption &&
  78           hasLandscapeOption;
  79     },
  80
  81     /** @override */
  82     getDefaultValueInternal: function() {
  83       var cap = this.getPageOrientationCapability_();
  84       var defaultOptions = cap.option.filter(function(option) {
  85         return option.is_default;
  86       });
  87       return defaultOptions.length == 0 ? false :
  88                                           defaultOptions[0].type == 'LANDSCAPE';
  89     },
  90
  91     /** @override */
  92     getCapabilityNotAvailableValueInternal: function() {
  93       var doc = this.getDocumentInfoInternal();
  94       return doc.hasCssMediaStyles ?
  95           (doc.pageSize.width > doc.pageSize.height) :
  96           false;
  97     },
  98
  99     /** @override */
 100     updateValueInternal: function(value) {
 101       var updateMargins = !this.isValueEqual(value);
 102       print_preview.ticket_items.TicketItem.prototype.updateValueInternal.call(
 103           this, value);
 104       if (updateMargins) {
 105         // Reset the user set margins when page orientation changes.
 106         this.marginsType_.updateValue(
 107           print_preview.ticket_items.MarginsType.Value.DEFAULT);
 108         this.customMargins_.updateValue(null);
 109       }
 110     },
 111
 112     /**
 113      * @return {Object} Page orientation capability of the selected destination.
 114      * @private
 115      */
 116     getPageOrientationCapability_: function() {
 117       var dest = this.getSelectedDestInternal();
 118       return (dest &&
 119               dest.capabilities &&
 120               dest.capabilities.printer &&
 121               dest.capabilities.printer.page_orientation) ||
 122              null;
 123     }
 124   };
 125
 126   // Export
 127   return {
 128     Landscape: Landscape
 129   };
 130 });