OOP PDF: Allow print preview to handle key events when the plugin has focus

chrome/browser/resources/pdf/pdf.js

 // Copyright 2013 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.
 
 'use strict';
 
 /**
  * @return {number} Width of a scrollbar in pixels
  */
 function getScrollbarWidth() {
@@ skipping 147 matching lines @@
 PDFViewer.prototype = {
   /**
    * @private
    * Handle key events. These may come from the user directly or via the
    * scripting API.
    * @param {KeyboardEvent} e the event to handle.
    */
   handleKeyEvent_: function(e) {
     var position = this.viewport_.position;
     // Certain scroll events may be sent from outside of the extension.
-    var fromScriptingAPI = e.type == 'scriptingKeypress';
+    var fromScriptingAPI = e.fromScriptingAPI;
 
     var pageUpHandler = function() {
       // Go to the previous page if we are fit-to-page.
       if (this.viewport_.fittingType == Viewport.FittingType.FIT_TO_PAGE) {
         this.viewport_.goToPage(this.viewport_.getMostVisiblePage() - 1);
         // Since we do the movement of the page.
         e.preventDefault();
       } else if (fromScriptingAPI) {
         position.y -= this.viewport.size.height;
         this.viewport.position = position;
@@ skipping 84 matching lines @@
         }
         return;
       case 221:  // right bracket.
         if (e.ctrlKey) {
           this.plugin_.postMessage({
             type: 'rotateClockwise'
           });
         }
         return;
     }
+
+    // Give print preview a chance to handle the key event.
+    if (!fromScriptingAPI && this.isPrintPreview_) {
+      this.sendScriptingMessage_({
+        type: 'sendKeyEvent',
+        keyEvent: SerializeKeyEvent(e)
+      });
+    }
   },
 
   /**
    * @private
    * Notify the plugin to print.
    */
   print_: function() {
     this.plugin_.postMessage({
       type: 'print'
     });
@@ skipping 347 matching lines @@
           type: 'resetPrintPreviewMode',
           url: message.data.url,
           grayscale: message.data.grayscale,
           // If the PDF isn't modifiable we send 0 as the page count so that no
           // blank placeholder pages get appended to the PDF.
           pageCount: (message.data.modifiable ?
                       message.data.pageNumbers.length : 0)
         });
         return true;
       case 'sendKeyEvent':
-        var e = document.createEvent('Event');
-        e.initEvent('scriptingKeypress');
-        e.keyCode = message.data.keyCode;
-        this.handleKeyEvent_(e);
+        this.handleKeyEvent_(DeserializeKeyEvent(message.data.keyEvent));
         return true;
     }
 
     return false;
   },
 
   /**
    * @private
    * Send a scripting message outside the extension (typically to
    * PDFScriptingAPI in a page containing the extension).
@@ skipping 26 matching lines @@
    * Each bookmark is an Object containing a:
    * - title
    * - page (optional)
    * - array of children (themselves bookmarks)
    * @type {Array} the top-level bookmarks of the PDF.
    */
   get bookmarks() {
     return this.bookmarks_;
   }
 };