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       var hasAutoOrPortraitOption = false;
  63       var hasLandscapeOption = false;
  64       cap.option.forEach(function(option) {
  65         hasAutoOrPortraitOption = hasAutoOrPortraitOption ||
  66             option.type == 'AUTO' ||
  67             option.type == 'PORTRAIT';
  68         hasLandscapeOption = hasLandscapeOption || option.type == 'LANDSCAPE';
  69       });
  70       // TODO(rltoscano): Technically, the print destination can still change
  71       // the orientation of the print out (at least for cloud printers) if the
  72       // document is not modifiable. But the preview wouldn't update in this
  73       // case so it would be a bad user experience.
  74       return this.getDocumentInfoInternal().isModifiable &&
  75           !this.getDocumentInfoInternal().hasCssMediaStyles &&
  76           hasAutoOrPortraitOption &&
  77           hasLandscapeOption;
  78     },
  79
  80     /** @override */
  81     getDefaultValueInternal: function() {
  82       var cap = this.getPageOrientationCapability_();
  83       var defaultOptions = cap.option.filter(function(option) {
  84         return option.is_default;
  85       });
  86       return defaultOptions.length == 0 ? false :
  87                                           defaultOptions[0].type == 'LANDSCAPE';
  88     },
  89
  90     /** @override */
  91     getCapabilityNotAvailableValueInternal: function() {
  92       var doc = this.getDocumentInfoInternal();
  93       return doc.hasCssMediaStyles ?
  94           (doc.pageSize.width > doc.pageSize.height) :
  95           false;
  96     },
  97
  98     /** @override */
  99     updateValueInternal: function(value) {
 100       var updateMargins = !this.isValueEqual(value);
 101       print_preview.ticket_items.TicketItem.prototype.updateValueInternal.call(
 102           this, value);
 103       if (updateMargins) {
 104         // Reset the user set margins when page orientation changes.
 105         this.marginsType_.updateValue(
 106           print_preview.ticket_items.MarginsType.Value.DEFAULT);
 107         this.customMargins_.updateValue(null);
 108       }
 109     },
 110
 111     /**
 112      * @return {boolean} Whether capability contains the |value|.
 113      * @param {string} value Option to check.
 114      */
 115     hasOption: function(value) {
 116       var cap = this.getPageOrientationCapability_();
 117       if (!cap)
 118         return false;
 119       return cap.option.some(function(option) {
 120         return option.type == value;
 121       });
 122     },
 123
 124     /**
 125      * @return {Object} Page orientation capability of the selected destination.
 126      * @private
 127      */
 128     getPageOrientationCapability_: function() {
 129       var dest = this.getSelectedDestInternal();
 130       return (dest &&
 131               dest.capabilities &&
 132               dest.capabilities.printer &&
 133               dest.capabilities.printer.page_orientation) ||
 134              null;
 135     }
 136   };
 137
 138   // Export
 139   return {
 140     Landscape: Landscape
 141   };
 142 });