feat(ios): add Ti.UI.Window.focused property

attempt to make logic of TabGroup fall in line with Window, so the initial focus event happens after open like for Window

Fixes TIMOB-27711

iphone/Classes/TiUITabGroup.m

@@ -99,6 +99,8 @@ - (void)handleDidShowTab:(TiUITabProxy *)newFocus
     return;
   }
 
+  // FIXME: COmbine with focusEvent! That one builds the very first focus event
+  // This builds later ones
   NSMutableDictionary *event = [NSMutableDictionary dictionaryWithCapacity:4];
 
   NSArray *tabArray = [controller viewControllers];
@@ -596,20 +598,6 @@ - (void)open:(id)args
   UIView *view = [self tabController].view;
   [view setFrame:[self bounds]];
   [self addSubview:view];
-
-  // on an open, make sure we send the focus event to focused tab
-  NSArray *tabArray = [controller viewControllers];
-  NSInteger index = 0;
-  if (focusedTabProxy != nil) {
-    index = [tabArray indexOfObject:[(TiUITabProxy *)focusedTabProxy controller]];
-  }
-  NSDictionary *event = [NSDictionary dictionaryWithObjectsAndKeys:focusedTabProxy, @"tab", NUMINTEGER(index), @"index", NUMINT(-1), @"previousIndex", [NSNull null], @"previousTab", nil];
-  if ([self.proxy _hasListeners:@"focus"]) {
-    [self.proxy fireEvent:@"focus" withObject:event];
-  }
-
-  // Tab has already been focused by the tab controller delegate
-  //[focused handleDidFocus:event];
 }
 
 - (void)close:(id)args
@@ -620,6 +608,24 @@ - (void)close:(id)args
   RELEASE_TO_NIL(controller);
 }
 
+// This is the focus event we fire on initial open, or when the TabGroup gets focus
+// Note that handleDidShowTab builds the more complex event for switching tabs
+// (and also fires a blur event)
+- (NSDictionary *)focusEvent
+{
+  NSArray *tabArray = [controller viewControllers];
+  NSInteger index = 0;
+  if (focusedTabProxy != nil) {
+    index = [tabArray indexOfObject:[(TiUITabProxy *)focusedTabProxy controller]];
+  }
+  return @{
+    @"tab" : focusedTabProxy,
+    @"index" : NUMINTEGER(index),
+    @"previousIndex" : NUMINT(-1),
+    @"previousTab" : [NSNull null]
+  };
+}
+
 @end
 
 #endif

iphone/Classes/TiUITabGroupProxy.m

@@ -169,6 +169,15 @@ - (BOOL)handleFocusEvents
   return NO;
 }
 
+- (void)fireFocusEvent
+{
+  if ([self _hasListeners:@"focus"]) {
+    // on an open, make sure we send the focus event to focused tab
+    NSDictionary *event = [((TiUITabGroup *)self.view)focusEvent];
+    [self fireEvent:@"focus" withObject:event];
+  }
+}
+
 - (void)gainFocus
 {
   if (!focussed) {

iphone/TitaniumKit/TitaniumKit/Sources/API/TiWindowProxy.m

@@ -99,17 +99,22 @@ - (void)windowWillOpen
   }
 }
 
+- (void)fireFocusEvent
+{
+  if ([self _hasListeners:@"focus"]) {
+    [self fireEvent:@"focus" withObject:nil withSource:self propagate:NO reportSuccess:NO errorCode:0 message:nil];
+  }
+}
+
 - (void)windowDidOpen
 {
   opening = NO;
   opened = YES;
   if ([self _hasListeners:@"open"]) {
     [self fireEvent:@"open" withObject:nil withSource:self propagate:NO reportSuccess:NO errorCode:0 message:nil];
   }
-  if (focussed && [self handleFocusEvents]) {
-    if ([self _hasListeners:@"focus"]) {
-      [self fireEvent:@"focus" withObject:nil withSource:self propagate:NO reportSuccess:NO errorCode:0 message:nil];
-    }
+  if (focussed) {
+    [self fireFocusEvent];
   }
   [super windowDidOpen];
   [self forgetProxy:openAnimation];
@@ -337,6 +342,11 @@ - (NSNumber *)closed
   return NUMBOOL(!opening && !opened && !closing);
 }
 
+- (NSNumber *)focused
+{
+  return NUMBOOL(focussed);
+}
+
 - (BOOL)_handleOpen:(id)args
 {
   TiRootViewController *theController = [[TiApp app] controller];
@@ -437,10 +447,8 @@ - (void)gainFocus
 {
   if (!focussed) {
     focussed = YES;
-    if ([self handleFocusEvents] && opened) {
-      if ([self _hasListeners:@"focus"]) {
-        [self fireEvent:@"focus" withObject:nil withSource:self propagate:NO reportSuccess:NO errorCode:0 message:nil];
-      }
+    if (opened) {
+      [self fireFocusEvent];
     }
     UIAccessibilityPostNotification(UIAccessibilityScreenChangedNotification, nil);
     [[self view] setAccessibilityElementsHidden:NO];