fix: set last/first page as idling when dragging (#682)

* fix: set last/first page as idling when dragging

* fix: adjust fabric implementation

Author: okwasniewski

ios/Fabric/RNCPagerViewComponentView.mm

@@ -260,6 +260,9 @@ - (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView {
 
 - (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset {
 
+    const auto strongEventEmitter = *std::dynamic_pointer_cast<const RNCViewPagerEventEmitter>(_eventEmitter);
+    strongEventEmitter.onPageScrollStateChanged(RNCViewPagerEventEmitter::OnPageScrollStateChanged{.pageScrollState =  RNCViewPagerEventEmitter::OnPageScrollStateChangedPageScrollState::Settling });
+    
     if (!_overdrag) {
         NSInteger maxIndex = _nativeChildrenViewControllers.count - 1;
         BOOL isFirstPage = [self isLtrLayout] ? _currentIndex == 0 : _currentIndex == maxIndex;
@@ -270,11 +273,12 @@ - (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoi
         if ((isFirstPage && contentOffset <= topBound) || (isLastPage && contentOffset >= topBound)) {
             CGPoint croppedOffset = [self isHorizontal] ? CGPointMake(topBound, 0) : CGPointMake(0, topBound);
             *targetContentOffset = croppedOffset;
+            
+            strongEventEmitter.onPageScrollStateChanged(RNCViewPagerEventEmitter::OnPageScrollStateChanged{.pageScrollState =  RNCViewPagerEventEmitter::OnPageScrollStateChangedPageScrollState::Idle });
         }
     }
 
-    const auto strongEventEmitter = *std::dynamic_pointer_cast<const RNCViewPagerEventEmitter>(_eventEmitter);
-    strongEventEmitter.onPageScrollStateChanged(RNCViewPagerEventEmitter::OnPageScrollStateChanged{.pageScrollState =  RNCViewPagerEventEmitter::OnPageScrollStateChangedPageScrollState::Settling });
+   
 }
 
 - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {

ios/ReactNativePageView.m

@@ -375,6 +375,8 @@ - (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoi
         if ((isFirstPage && contentOffset <= topBound) || (isLastPage && contentOffset >= topBound)) {
             CGPoint croppedOffset = [self isHorizontal] ? CGPointMake(topBound, 0) : CGPointMake(0, topBound);
             *targetContentOffset = croppedOffset;
+            
+            [self.eventDispatcher sendEvent:[[RCTOnPageScrollStateChanged alloc] initWithReactTag:self.reactTag state:@"idle" coalescingKey:_coalescingKey++]];
         }
     }
 }