chrome/browser/resources/print_preview/print_header.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', function() {
   6   'use strict';
   7
   8   /**
   9    * Creates a PrintHeader object. This object encapsulates all the elements
  10    * and logic related to the top part of the left pane in print_preview.html.
  11    * @param {!print_preview.PrintTicketStore} printTicketStore Used to read
  12    *     information about the document.
  13    * @param {!print_preview.DestinationStore} destinationStore Used to get the
  14    *     selected destination.
  15    * @constructor
  16    * @extends {print_preview.Component}
  17    */
  18   function PrintHeader(printTicketStore, destinationStore) {
  19     print_preview.Component.call(this);
  20
  21     /**
  22      * Used to read information about the document.
  23      * @type {!print_preview.PrintTicketStore}
  24      * @private
  25      */
  26     this.printTicketStore_ = printTicketStore;
  27
  28     /**
  29      * Used to get the selected destination.
  30      * @type {!print_preview.DestinationStore}
  31      * @private
  32      */
  33     this.destinationStore_ = destinationStore;
  34
  35     /**
  36      * Whether the component is enabled.
  37      * @type {boolean}
  38      * @private
  39      */
  40     this.isEnabled_ = true;
  41
  42     /**
  43      * Whether the print button is enabled.
  44      * @type {boolean}
  45      * @private
  46      */
  47     this.isPrintButtonEnabled_ = true;
  48   };
  49
  50   /**
  51    * Event types dispatched by the print header.
  52    * @enum {string}
  53    */
  54   PrintHeader.EventType = {
  55     PRINT_BUTTON_CLICK: 'print_preview.PrintHeader.PRINT_BUTTON_CLICK',
  56     CANCEL_BUTTON_CLICK: 'print_preview.PrintHeader.CANCEL_BUTTON_CLICK'
  57   };
  58
  59   PrintHeader.prototype = {
  60     __proto__: print_preview.Component.prototype,
  61
  62     set isEnabled(isEnabled) {
  63       this.isEnabled_ = isEnabled;
  64       this.updatePrintButtonEnabledState_();
  65       this.isCancelButtonEnabled = isEnabled;
  66     },
  67
  68     get isPrintButtonEnabled() {
  69       return !this.getChildElement('button.print').disabled;
  70     },
  71
  72     set isPrintButtonEnabled(isEnabled) {
  73       this.isPrintButtonEnabled_ = isEnabled;
  74       this.updatePrintButtonEnabledState_();
  75     },
  76
  77     set isCancelButtonEnabled(isEnabled) {
  78       this.getChildElement('button.cancel').disabled = !isEnabled;
  79     },
  80
  81     /** @param {string} message Error message to display in the print header. */
  82     setErrorMessage: function(message) {
  83       var summaryEl = this.getChildElement('.summary');
  84       summaryEl.innerHTML = '';
  85       summaryEl.textContent = message;
  86       this.getChildElement('button.print').classList.toggle('loading', false);
  87       this.getChildElement('button.cancel').classList.toggle('loading', false);
  88     },
  89
  90     /** @override */
  91     decorateInternal: function() {
  92       cr.ui.reverseButtonStrips(this.getElement());
  93     },
  94
  95     /** @override */
  96     enterDocument: function() {
  97       print_preview.Component.prototype.enterDocument.call(this);
  98
  99       // User events
 100       this.tracker.add(
 101           this.getChildElement('button.cancel'),
 102           'click',
 103           this.onCancelButtonClick_.bind(this));
 104       this.tracker.add(
 105           this.getChildElement('button.print'),
 106           'click',
 107           this.onPrintButtonClick_.bind(this));
 108
 109       // Data events.
 110       this.tracker.add(
 111           this.printTicketStore_,
 112           print_preview.PrintTicketStore.EventType.INITIALIZE,
 113           this.onTicketChange_.bind(this));
 114       this.tracker.add(
 115           this.printTicketStore_,
 116           print_preview.PrintTicketStore.EventType.DOCUMENT_CHANGE,
 117           this.onTicketChange_.bind(this));
 118       this.tracker.add(
 119           this.printTicketStore_,
 120           print_preview.PrintTicketStore.EventType.TICKET_CHANGE,
 121           this.onTicketChange_.bind(this));
 122       this.tracker.add(
 123           this.destinationStore_,
 124           print_preview.DestinationStore.EventType.DESTINATION_SELECT,
 125           this.onDestinationSelect_.bind(this));
 126       this.tracker.add(
 127           this.printTicketStore_.copies,
 128           print_preview.ticket_items.TicketItem.EventType.CHANGE,
 129           this.onTicketChange_.bind(this));
 130       this.tracker.add(
 131           this.printTicketStore_.duplex,
 132           print_preview.ticket_items.TicketItem.EventType.CHANGE,
 133           this.onTicketChange_.bind(this));
 134       this.tracker.add(
 135           this.printTicketStore_.pageRange,
 136           print_preview.ticket_items.TicketItem.EventType.CHANGE,
 137           this.onTicketChange_.bind(this));
 138     },
 139
 140     /**
 141      * Updates Print Button state.
 142      * @private
 143      */
 144     updatePrintButtonEnabledState_: function() {
 145       this.getChildElement('button.print').disabled =
 146           this.destinationStore_.selectedDestination == null ||
 147           !this.isEnabled_ ||
 148           !this.isPrintButtonEnabled_ ||
 149           !this.printTicketStore_.isTicketValid();
 150     },
 151
 152     /**
 153      * Updates the summary element based on the currently selected user options.
 154      * @private
 155      */
 156     updateSummary_: function() {
 157       if (!this.printTicketStore_.isTicketValid()) {
 158         this.getChildElement('.summary').innerHTML = '';
 159         return;
 160       }
 161
 162       var summaryLabel =
 163           loadTimeData.getString('printPreviewSheetsLabelSingular');
 164       var pagesLabel = loadTimeData.getString('printPreviewPageLabelPlural');
 165
 166       var saveToPdf = this.destinationStore_.selectedDestination &&
 167           this.destinationStore_.selectedDestination.id ==
 168               print_preview.Destination.GooglePromotedId.SAVE_AS_PDF;
 169       if (saveToPdf) {
 170         summaryLabel = loadTimeData.getString('printPreviewPageLabelSingular');
 171       }
 172
 173       var numPages = this.printTicketStore_.pageRange.getPageNumberSet().size;
 174       var numSheets = numPages;
 175       if (!saveToPdf && this.printTicketStore_.duplex.getValue()) {
 176         numSheets = Math.ceil(numPages / 2);
 177       }
 178
 179       var copies = this.printTicketStore_.copies.getValueAsNumber();
 180       numSheets *= copies;
 181       numPages *= copies;
 182
 183       if (numSheets > 1) {
 184         summaryLabel = saveToPdf ? pagesLabel :
 185             loadTimeData.getString('printPreviewSheetsLabelPlural');
 186       }
 187
 188       var html;
 189       var label;
 190       if (numPages != numSheets) {
 191         html = loadTimeData.getStringF('printPreviewSummaryFormatLong',
 192                                        '<b>' + numSheets + '</b>',
 193                                        '<b>' + summaryLabel + '</b>',
 194                                        numPages,
 195                                        pagesLabel);
 196         label = loadTimeData.getStringF('printPreviewSummaryFormatLong',
 197                                         numSheets, summaryLabel,
 198                                         numPages, pagesLabel);
 199       } else {
 200         html = loadTimeData.getStringF('printPreviewSummaryFormatShort',
 201                                        '<b>' + numSheets + '</b>',
 202                                        '<b>' + summaryLabel + '</b>');
 203         label = loadTimeData.getStringF('printPreviewSummaryFormatShort',
 204                                         numSheets, summaryLabel);
 205       }
 206
 207       // Removing extra spaces from within the string.
 208       html = html.replace(/\s{2,}/g, ' ');
 209
 210       var summary = this.getChildElement('.summary');
 211       summary.innerHTML = html;
 212       summary.setAttribute('aria-label', label);
 213     },
 214
 215     /**
 216      * Called when the print button is clicked. Dispatches a PRINT_DOCUMENT
 217      * common event.
 218      * @private
 219      */
 220     onPrintButtonClick_: function() {
 221       if (this.destinationStore_.selectedDestination.id !=
 222           print_preview.Destination.GooglePromotedId.SAVE_AS_PDF) {
 223         this.getChildElement('button.print').classList.add('loading');
 224         this.getChildElement('button.cancel').classList.add('loading');
 225         this.getChildElement('.summary').innerHTML =
 226             loadTimeData.getString('printing');
 227       }
 228       cr.dispatchSimpleEvent(this, PrintHeader.EventType.PRINT_BUTTON_CLICK);
 229     },
 230
 231     /**
 232      * Called when the cancel button is clicked. Dispatches a
 233      * CLOSE_PRINT_PREVIEW event.
 234      * @private
 235      */
 236     onCancelButtonClick_: function() {
 237       cr.dispatchSimpleEvent(this, PrintHeader.EventType.CANCEL_BUTTON_CLICK);
 238     },
 239
 240     /**
 241      * Called when a new destination is selected. Updates the text on the print
 242      * button.
 243      * @private
 244      */
 245     onDestinationSelect_: function() {
 246       var isSaveLabel = this.destinationStore_.selectedDestination &&
 247           (this.destinationStore_.selectedDestination.id ==
 248                print_preview.Destination.GooglePromotedId.SAVE_AS_PDF ||
 249            this.destinationStore_.selectedDestination.id ==
 250                print_preview.Destination.GooglePromotedId.DOCS);
 251       this.getChildElement('button.print').textContent =
 252           loadTimeData.getString(isSaveLabel ? 'saveButton' : 'printButton');
 253       if (this.destinationStore_.selectedDestination) {
 254         this.getChildElement('button.print').focus();
 255       }
 256     },
 257
 258     /**
 259      * Called when the print ticket has changed. Disables the print button if
 260      * any of the settings are invalid.
 261      * @private
 262      */
 263     onTicketChange_: function() {
 264       this.updatePrintButtonEnabledState_();
 265       this.updateSummary_();
 266       if (document.activeElement == null ||
 267           document.activeElement == document.body) {
 268         this.getChildElement('button.print').focus();
 269       }
 270     }
 271   };
 272
 273   // Export
 274   return {
 275     PrintHeader: PrintHeader
 276   };
 277 });