feat(android): parity for Tab.popToRootWindow()

android/modules/ui/src/java/ti/modules/titanium/ui/TabProxy.java

@@ -253,6 +253,12 @@ public void onPropertyChanged(String name, Object value)
 		}
 	}
 
+	@Kroll.method
+	public void popToRootWindow()
+	{
+		TiApplication.getInstance().popToRootWindow();
+	}
+
 	@Override
 	public String getApiName()
 	{

android/titanium/src/java/org/appcelerator/titanium/TiApplication.java

@@ -45,6 +45,7 @@
 import org.json.JSONException;
 import org.json.JSONObject;
 import ti.modules.titanium.TitaniumModule;
+import ti.modules.titanium.ui.TabGroupProxy;
 
 import java.io.File;
 import java.lang.Thread.UncaughtExceptionHandler;
@@ -1004,4 +1005,35 @@ public AccessibilityManager getAccessibilityManager()
 	public void verifyCustomModules(TiRootActivity rootActivity)
 	{
 	}
+
+	public void popToRootWindow()
+	{
+		/**
+		 * emulates the iOS Tab.popToRootWindow() by closing all windows above a TabGroup.
+		 */
+		int tabGroupPosition = -1;
+		boolean isTabGroup = false;
+
+		for (int i = 0; i <= activityStack.size(); ++i) {
+			isTabGroup = (activityStack.get(i).get() instanceof TiActivity)
+				&& ((TiActivity) activityStack.get(i).get()).getWindowProxy() instanceof TabGroupProxy;
+			if (isTabGroup) {
+				tabGroupPosition = i;
+				break;
+			}
+		}
+
+		// no TabGroup - don't do anything
+		if (!isTabGroup || tabGroupPosition == -1) {
+			return;
+		}
+
+		// finish all activities above our TabGroup
+		for (int i = activityStack.size() - 1; i > tabGroupPosition; --i) {
+			if (activityStack.get(i).get() instanceof TiActivity) {
+				TiActivity currentActivity = (TiActivity) activityStack.get(i).get();
+				currentActivity.finish();
+			}
+		}
+	}
 }

apidoc/Titanium/UI/Tab.yml

@@ -130,19 +130,18 @@ methods:
       notes: Set the value of the [window](Titanium.UI.Tab.window) property directly.
 
   - name: popToRootWindow
-    # FIXME: I don't think this exists on Android!
     summary: Closes all windows that are currently opened inside the tab.
     description: Note that only the `close` event of the most recently opened window is fired.
     parameters:
       - name: options
         summary: |
-            Options supporting a single `animated` boolean property to determine whether the windows
+            iOS only: Options supporting a single `animated` boolean property to determine whether the windows
             will be animated while being closed (default: false).
         type: AnimatedOptions
         optional: true
         default: "{ animated: false }"
-    since: "6.2.0"
-    platforms: [iphone, ipad, macos]
+    since: {android: "12.4.0", iphone: "6.2.0", ipad: "6.2.0", macos: "9.2.0"}
+    platforms: [android, iphone, ipad, macos]
 
 properties:
   - name: active