fix: expose orientation to application module (#7832)

tests/app/application/application-tests-common.ts

@@ -21,3 +21,7 @@ export function testDisplayedEvent() {
     // global.isDisplayedEventFired flag is set in app.ts application.displayedEvent handler
     TKUnit.assert((<any>global).isDisplayedEventFired, "application.displayedEvent not fired");
 }
+
+export function testOrientation() {
+    TKUnit.assert(app.orientation, "Orientation not initialized.");
+}

tns-core-modules/application/application.android.ts

@@ -248,6 +248,10 @@ export function getNativeApplication(): android.app.Application {
     return nativeApp;
 }
 
+export function orientation(): "portrait" | "landscape" | "unknown" {
+    return androidApp.orientation;
+}
+
 on(orientationChangedEvent, (args: OrientationChangedEventData) => {
     const rootView = getRootView();
     if (rootView) {

tns-core-modules/application/application.d.ts

@@ -285,6 +285,12 @@ export function on(event: "discardedError", callback: (args: DiscardedErrorEvent
  */
 export function on(event: "orientationChanged", callback: (args: OrientationChangedEventData) => void, thisArg?: any);
 
+/**
+ * Gets the orientation of the application.
+ * Available values: "portrait", "landscape", "unknown".
+ */
+export function orientation(): "portrait" | "landscape" | "unknown";
+
 /**
  * This is the Android-specific application object instance.
  * Encapsulates methods and properties specific to the Android platform.

tns-core-modules/application/application.ios.ts

@@ -415,6 +415,10 @@ function setViewControllerView(view: View): void {
     }
 }
 
+export function orientation(): "portrait" | "landscape" | "unknown" {
+    return iosApp.orientation;
+}
+
 on(orientationChangedEvent, (args: OrientationChangedEventData) => {
     const rootView = getRootView();
     if (rootView) {