Add facade for consistent access to underlying native JavaScript window

src/Default/default.ts

@@ -107,6 +107,10 @@ export class DefaultContainerWindow extends ContainerWindow {
     protected detachListener(eventName: string, listener: (...args: any[]) => void): void {
         this.innerWindow.removeEventListener(windowEventMap[eventName] || eventName, listener);
     }
+
+    public get nativeWindow(): Window {
+        return this.innerWindow;
+    }
 }
 
 /**

src/Electron/electron.ts

@@ -193,6 +193,11 @@ export class ElectronContainerWindow extends ContainerWindow {
     protected detachListener(eventName: string, listener: (...args: any[]) => void): void {
         this.innerWindow.removeListener(windowEventMap[eventName] || eventName, listener);
     }
+
+    public get nativeWindow(): Window {
+        // For Electron we can only return in and for current renderer
+        return this.window || window;
+    }
 }
 
 /**

src/OpenFin/openfin.ts

@@ -193,6 +193,10 @@ export class OpenFinContainerWindow extends ContainerWindow {
     protected detachListener(eventName: string, listener: (...args: any[]) => void): any {
         this.innerWindow.removeEventListener(windowEventMap[eventName] || eventName, listener);
     }
+
+    public get nativeWindow(): Window {
+        return this.innerWindow.getNativeWindow();
+    }
 }
 
 /**

src/window.ts

@@ -141,6 +141,13 @@ export abstract class ContainerWindow extends EventEmitter {
 
     public abstract getOptions(): Promise<any>;
 
+    /** Gets the underlying native JavaScript window object. As some containers
+     * do not support native access, check for undefined.
+     */
+    public get nativeWindow(): Window {
+        return undefined;
+    }
+
     /**
      * Override to provide custom container logic for adding an event handler.
      */

tests/unit/Default/default.spec.ts

@@ -190,6 +190,13 @@ describe("DefaultContainerWindow", () => {
             });
         });
     });
+
+    it("nativeWindow returns wrapped window", () => {
+        const innerWindow = {};
+        const nativeWindow = new DefaultContainerWindow(innerWindow).nativeWindow;
+        expect(nativeWindow).toBeDefined();
+        expect(nativeWindow).toEqual(<any>innerWindow);
+    });
 });
 
 describe("DefaultContainer", () => {

tests/unit/Electron/electron.spec.ts

@@ -268,6 +268,12 @@ describe("ElectronContainerWindow", () => {
             win.removeListener("move", () => {});
             expect(win.innerWindow.removeListener).toHaveBeenCalledWith("move", jasmine.any(Function));
         });
+
+        it("nativeWindow returns window", () => {
+            var window = {};
+            const win = new ElectronContainerWindow(innerWin, container, <any>window);
+            expect(win.nativeWindow).toEqual(<any>window);
+        });
     });
 
     describe("window grouping", () => {

tests/unit/OpenFin/openfin.spec.ts

@@ -57,6 +57,7 @@ class MockInterApplicationBus {
 
 class MockWindow {
     static singleton: MockWindow = new MockWindow("Singleton");
+    public nativeWindow: Window = jasmine.createSpyObj("window", ["location"]);
 
     constructor(name?: string) {
         this.name = name;
@@ -68,7 +69,7 @@ class MockWindow {
 
     getParentWindow(): any { return MockWindow.singleton; }
 
-    getNativeWindow(): any { return jasmine.createSpyObj("window", ["location"]); }
+    getNativeWindow(): any { return this.nativeWindow; }
 
     focus(callback: () => void, error: (reason) => void): any {
         callback();
@@ -175,6 +176,14 @@ describe("OpenFinContainerWindow", () => {
         expect(win.name).toEqual("NAME");
     });
 
+    it ("nativeWindow invokes underlying getNativeWindow", () => {
+        spyOn(innerWin, "getNativeWindow").and.callThrough();
+        const nativeWin = win.nativeWindow;
+        expect(innerWin.getNativeWindow).toHaveBeenCalled();
+        expect(nativeWin).toBeDefined();
+        expect(nativeWin).toEqual(innerWin.nativeWindow);
+    });
+
     it("focus", (done) => {
         spyOn(innerWin, "focus").and.callThrough();
         win.focus().then(() => {

tests/unit/window.spec.ts

@@ -12,6 +12,12 @@ class MockWindow extends ContainerWindow {
     public restore(): Promise<void> { return Promise.resolve(); }
 }
 
+describe ("ContainerWindow", () => {
+    it("nativeWindow returns undefined", () => {
+        expect(new MockWindow(undefined).nativeWindow).toBeUndefined();
+    });
+});
+
 describe ("static events", () => {
     let container: TestContainer;