Add type strings to derived and base classes.

Signed-off-by: Gökay Şatır <gokaysatir@gmail.com>
Change-Id: Id071599b60febd88f0c1c276613b1805644ea375

Author: gokaysatir

browser/mocha_tests/CanvasSectionContainer.test.ts

@@ -16,6 +16,7 @@
 /// <reference path="../src/app/TilesMiddleware.ts" />
 /// <reference path="../src/app/Rectangle.ts" />
 /// <reference path="../src/app/LOUtil.ts" />
+/// <reference path="../src/app/ViewLayout.ts" />
 /// <reference path="../src/app/ViewLayoutMultiPage.ts" />
 /// <reference path="./helper/canvasContainerSetup.ts" />
 /// <reference path="./helper/rectUtil.ts" />

browser/src/app/DocumentBase.ts

@@ -11,6 +11,7 @@
  */
 
 class DocumentBase {
+	public readonly type: string = 'DocumentBase';
 	public activeView: ViewLayoutBase;
 	protected _fileSize: cool.SimplePoint;
 

browser/src/app/ViewLayout.ts

@@ -10,6 +10,7 @@
  */
 
 class ViewLayoutBase {
+	public readonly type: string = 'ViewLayoutBase';
 	protected _viewedRectangle: cool.SimpleRectangle;
 	private lastViewedRectangle: cool.SimpleRectangle;
 	protected clientVisibleAreaCommand: string = '';

browser/src/app/ViewLayoutMultiPage.ts

@@ -18,6 +18,7 @@ class LayoutPageRectangle extends cool.SimpleRectangle {
 }
 
 class MultiPageViewLayout extends ViewLayoutBase {
+	public readonly type: string = 'MultiPageViewLayout';
 	public gapBetweenPages = 20; // Core pixels.
 	public availableWidth = 0;
 	private maxRowsSize = 2;