Add a "Simplify Page" option to the print preview dialog

chrome/browser/resources/print_preview/native_layer.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');
 
 /**
  * @typedef {{selectSaveAsPdfDestination: boolean,
  *            layoutSettings.portrait: boolean,
  *            pageRange: string,
@@ skipping 49 matching lines @@
         this.onPrivetCapabilitiesSet_.bind(this);
     global.onPrivetPrintFailed = this.onPrivetPrintFailed_.bind(this);
     global.onExtensionPrintersAdded =
         this.onExtensionPrintersAdded_.bind(this);
     global.onExtensionCapabilitiesSet =
         this.onExtensionCapabilitiesSet_.bind(this);
     global.onEnableManipulateSettingsForTest =
         this.onEnableManipulateSettingsForTest_.bind(this);
     global.printPresetOptionsFromDocument =
         this.onPrintPresetOptionsFromDocument_.bind(this);
+   global.detectDistillablePage =
+        this.detectDistillablePage_.bind(this);
     global.onProvisionalPrinterResolved =
         this.onProvisionalDestinationResolved_.bind(this);
     global.failedToResolveProvisionalPrinter =
         this.failedToResolveProvisionalDestination_.bind(this);
   };
 
   /**
    * Event types dispatched from the Chromium native layer.
    * @enum {string}
    * @const
    */
   NativeLayer.EventType = {
     ACCESS_TOKEN_READY: 'print_preview.NativeLayer.ACCESS_TOKEN_READY',
+    ALLOW_DISTILL_PAGE: 'print_preview.NativeLayer.ALLOW_DISTILL_PAGE',
     CAPABILITIES_SET: 'print_preview.NativeLayer.CAPABILITIES_SET',
     CLOUD_PRINT_ENABLE: 'print_preview.NativeLayer.CLOUD_PRINT_ENABLE',
     DESTINATIONS_RELOAD: 'print_preview.NativeLayer.DESTINATIONS_RELOAD',
     DISABLE_SCALING: 'print_preview.NativeLayer.DISABLE_SCALING',
     FILE_SELECTION_CANCEL: 'print_preview.NativeLayer.FILE_SELECTION_CANCEL',
     FILE_SELECTION_COMPLETE:
         'print_preview.NativeLayer.FILE_SELECTION_COMPLETE',
     GET_CAPABILITIES_FAIL: 'print_preview.NativeLayer.GET_CAPABILITIES_FAIL',
     INITIAL_SETTINGS_SET: 'print_preview.NativeLayer.INITIAL_SETTINGS_SET',
     LOCAL_DESTINATIONS_SET: 'print_preview.NativeLayer.LOCAL_DESTINATIONS_SET',
@@ skipping 173 matching lines @@
         destination, printTicketStore, documentInfo, requestId) {
       assert(printTicketStore.isTicketValidForPreview(),
              'Trying to generate preview when ticket is not valid');
 
       var ticket = {
         'pageRange': printTicketStore.pageRange.getDocumentPageRanges(),
         'mediaSize': printTicketStore.mediaSize.getValue(),
         'landscape': printTicketStore.landscape.getValue(),
         'color': this.getNativeColorModel_(destination, printTicketStore.color),
         'headerFooterEnabled': printTicketStore.headerFooter.getValue(),
+        'distillPage': printTicketStore.distillPage.getValue(),
         'marginsType': printTicketStore.marginsType.getValue(),
         'isFirstRequest': requestId == 0,
         'requestID': requestId,
         'previewModifiable': documentInfo.isModifiable,
         'printToPDF':
             destination != null &&
             destination.id ==
                 print_preview.Destination.GooglePromotedId.SAVE_AS_PDF,
         'printWithCloudPrint': destination != null && !destination.isLocal,
         'printWithPrivet': destination != null && destination.isPrivet,
@@ skipping 443 matching lines @@
      * @private
      */
     onPrintPresetOptionsFromDocument_: function(options) {
       var printPresetOptionsEvent = new Event(
           NativeLayer.EventType.PRINT_PRESET_OPTIONS);
       printPresetOptionsEvent.optionsFromDocument = options;
       this.dispatchEvent(printPresetOptionsEvent);
     },
 
     /**
+      * Updates the interface to show the "Distill Page" option
+      * when PrintPreviewHandler::HandleIsPageDistillableResult
+      * determines that this page can be distilled with the
+      * DOM Distiller.
+      * @private
+      */
+     detectDistillablePage_: function() {
+       var allowDistillPageEvent = new Event(
+           NativeLayer.EventType.ALLOW_DISTILL_PAGE);
+       this.dispatchEvent(allowDistillPageEvent);
+     },
+
+    /**
      * Simulates a user click on the print preview dialog cancel button. Used
      * only for testing.
      * @private
      */
     autoCancelForTesting_: function() {
       var properties = {view: window, bubbles: true, cancelable: true};
       var click = new MouseEvent('click', properties);
       document.querySelector('#print-header .cancel').dispatchEvent(click);
     },
 
@@ skipping 339 matching lines @@
       return this.serializedAppStateStr_;
     }
   };
 
   // Export
   return {
     NativeInitialSettings: NativeInitialSettings,
     NativeLayer: NativeLayer
   };
 });