@class PXGDisplayAssetVideoPresentationController, PXUIMediaProvider, PXAssetReference, PXGDecoratingLayout, NSString, PXMessagesStackActivityIndicatorViewUserData, PXAssetsDataSource, PXLRUMemoryCache, NSSet, UIView, PXPhotosGridAssetDecorationSource, PXAssetsDataSourceManager, PXMessagesStackAdditionalItemsViewUserData, NSShadow, PXGView, PXEventCoalescer, PXMessagesStackPlaybackControlViewModel, UIPanGestureRecognizer, PXMessagesStackPlaybackControlUserData, UITapGestureRecognizer, PXMessagesStackItemsLayout;
@protocol PXDisplayAssetFetchResult, PXMessagesStackViewDelegate, PXTapbackStatusManager, UIViewControllerTransitioningDelegate;

@interface PXMessagesStackView : UIView <PXMessagesStackItemsLayoutPrimaryItemDelegate, PXGDisplayAssetSource, PXGSolidColorSource, PXAssetsDataSourceManagerObserver, PXMessagesStackItemsLayoutDelegate, PXScrollViewControllerObserver, PXGAssetBadgeDecorationSource, PXGSolidColorOverlayDecorationSource, PXGShadowSource, PXGSelectionDecorationSource, PXGTapbackDecorationSource, PXGViewSource, PXEventCoalescerObserver, UIViewControllerTransitioningDelegate, UIGestureRecognizerDelegate, PXPhotosGridStackTransitionEndpoint> {
    PXGView *_tungstenView;
    PXMessagesStackItemsLayout *_layout;
    PXGDecoratingLayout *_decoratingLayout;
    struct { BOOL didSelectAssetReference; BOOL didChangeCurrentAssetReference; BOOL shouldAutoplayAsset; BOOL didSelectAdditionalItems; } _delegateRespondsTo;
    struct _NSRange { unsigned long long location; unsigned long long length; } _cachedClampedItemRange;
    id<PXDisplayAssetFetchResult> _cachedClampedFetchResult;
    NSShadow *_centerItemShadow;
    PXEventCoalescer *_settledEventCoalescer;
    PXLRUMemoryCache *_videoPresentationControllersByItem;
    PXMessagesStackPlaybackControlUserData *_cachedPlaybackControlUserData;
    PXMessagesStackPlaybackControlViewModel *_playbackControlViewModel;
    PXPhotosGridAssetDecorationSource *_assetDecorationSource;
    long long _indexToRestore;
    struct PXSimpleIndexPath { long long dataSourceIdentifier; long long section; long long item; long long subitem; } _lastKnownPrimaryIndex;
    BOOL _isProgramaticallyScrolling;
    PXMessagesStackAdditionalItemsViewUserData *_cachedAdditionalItemsUserData;
    PXMessagesStackActivityIndicatorViewUserData *_activityIndicatorViewUserData;
}

@property (retain, nonatomic) PXAssetsDataSource *currentDataSource;
@property (nonatomic, getter=isSettled) BOOL settled;
@property (retain, nonatomic) PXGDisplayAssetVideoPresentationController *currentVideoPresentationController;
@property (retain, nonatomic) UIView *transitionPlaceholderView;
@property (nonatomic) BOOL debugColorModeEnabled;
@property (retain, nonatomic) PXAssetsDataSourceManager *dataSourceManager;
@property (retain, nonatomic) PXUIMediaProvider *mediaProvider;
@property (retain, nonatomic) id<PXTapbackStatusManager> tapbackStatusManager;
@property (weak, nonatomic) id<PXMessagesStackViewDelegate> delegate;
@property (readonly, nonatomic) unsigned long long currentIndex;
@property (readonly, nonatomic) PXAssetReference *currentAssetReference;
@property (copy, nonatomic) NSSet *hiddenAssetReferences;
@property (nonatomic) BOOL allowPlayableContentLoading;
@property (nonatomic) double verticalContentInsets;
@property (readonly, nonatomic) double horizontalContentMargin;
@property (nonatomic) double leftEdgeHorizontalContentMarginAdjustment;
@property (nonatomic) double rightEdgeHorizontalContentMarginAdjustment;
@property (readonly, nonatomic) UITapGestureRecognizer *tapGestureRecognizer;
@property (readonly, nonatomic) UIPanGestureRecognizer *panGestureRecognizer;
@property (readonly, nonatomic) id<UIViewControllerTransitioningDelegate> gridTransitioningDelegate;
@property (nonatomic) BOOL providesLoadingAppearanceAndBehavior;
@property (nonatomic) struct { unsigned long long count; long long type; } additionalItemsCount;
@property (nonatomic) BOOL selectionOverlayEnabled;
@property (nonatomic) BOOL useAspectTiles;
@property (nonatomic) long long horizontalAlignment;
@property (readonly) unsigned long long hash;
@property (readonly) Class superclass;
@property (readonly, copy) NSString *description;
@property (readonly, copy) NSString *debugDescription;

- (id)animationControllerForPresentedController:(id)a0 presentingController:(id)a1 sourceController:(id)a2;
- (id)interactionControllerForDismissal:(id)a0;
- (void)_updateDataSource;
- (struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })itemsLayout:(id)a0 bestCropRectForItem:(long long)a1 withAspectRatio:(double)a2;
- (id)animationControllerForDismissedController:(id)a0;
- (Class)viewClassForSpriteAtIndex:(unsigned int)a0 inLayout:(id)a1;
- (unsigned long long)supportedDisplayAssetPresentationStylesInLayout:(id)a0;
- (void)observable:(id)a0 didChange:(unsigned long long)a1 context:(void *)a2;
- (long long)itemsLayout:(id)a0 itemForObjectReference:(id)a1 options:(unsigned long long)a2;
- (void)_handleTap:(id)a0;
- (id)colorAtIndex:(unsigned int)a0 inLayout:(id)a1;
- (BOOL)wantsInteractiveFavoriteBadgesInLayout:(id)a0;
- (void)scrollViewControllerWillBeginScrolling:(id)a0;
- (BOOL)wantsAssetBadgeDecorationsInLayout:(id)a0;
- (unsigned long long)desiredPlaceholderStyleInLayout:(id)a0;
- (id)initWithFrame:(struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })a0;
- (long long)selectionDecorationStyleInLayout:(id)a0;
- (BOOL)gestureRecognizerShouldBegin:(id)a0;
- (struct PXAssetBadgeInfo { unsigned long long x0; double x1; long long x2; long long x3; })assetBadgeInfoForAsset:(id)a0 atSpriteIndex:(unsigned int)a1 inLayout:(id)a2;
- (struct { double x0; double x1; struct CGPoint { double x0; double x1; } x2; })tapbackConfigurationForProposedConfiguration:(struct { double x0; double x1; struct CGPoint { double x0; double x1; } x2; })a0 spriteIndex:(unsigned int)a1 inLayout:(id)a2;
- (void)prepareForDisplay;
- (BOOL)wantsTapbackDecorationInLayout:(id)a0;
- (BOOL)hasTapbacksForSpriteIndex:(unsigned int)a0 inLayout:(id)a1;
- (unsigned long long)selectionDecorationAdditionsInLayout:(id)a0;
- (void)scrollViewControllerDidEndScrolling:(id)a0;
- (double)cornerRadiusForShadowSpriteAtIndex:(unsigned int)a0 inLayout:(id)a1;
- (id)selectedSpriteIndexesInLayout:(id)a0;
- (void).cxx_destruct;
- (id)regionOfInterestForAssetReference:(id)a0;
- (id)itemsLayout:(id)a0 objectReferenceForItem:(long long)a1;
- (id)viewUserDataForSpriteAtIndex:(unsigned int)a0 inLayout:(id)a1;
- (id)displayAssetFetchResultForSpritesInRange:(struct _PXGSpriteIndexRange { unsigned int x0; unsigned int x1; })a0 inLayout:(id)a1;
- (BOOL)wantsFileSizeBadgesInLayout:(id)a0;
- (id)shadowForSpriteAtIndex:(unsigned int)a0 inLayout:(id)a1;
- (long long)overallSelectionOrderAtSpriteIndex:(unsigned int)a0 inLayout:(id)a1;
- (struct { float x0; float x1; float x2; float x3; })overlayInsetsForSpriteIndex:(unsigned int)a0 inLayout:(id)a1;
- (void)scrollViewControllerDidLayoutSubviews:(id)a0;
- (void)outputEventSignaledForCoalescer:(id)a0;
- (double)itemsLayout:(id)a0 aspectRatioForItem:(long long)a1;
- (void)layoutSubviews;
- (id)initWithCoder:(id)a0;
- (struct CGSize { double x0; double x1; })minSpriteSizeForPresentationStyle:(unsigned long long)a0;
- (double)horizontalContentMarginForSize:(struct CGSize { double x0; double x1; })a0;
- (id)installTransitionSnapshotViewForAssetReference:(id)a0 uncroppedImageFrame:(struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; } *)a1;
- (void)removeTransitionSnapshotView;
- (BOOL)scrollToAssetReference:(id)a0 animated:(BOOL)a1;
- (BOOL)scrollToIndex:(unsigned long long)a0 animated:(BOOL)a1;
- (void)setHiddenAssetReferences:(id)a0 animationType:(long long)a1;
- (BOOL)_isSpriteReferenceForPrimaryItem:(id)a0;
- (id)_presentationControllerForAsset:(id)a0;
- (id)_regionOfInterestForAssetReference:(id)a0 forTransitioning:(BOOL)a1;
- (BOOL)_shouldAutoplayAsset:(id)a0;
- (id)_trackingContainerViewForAssetReference:(id)a0;
- (void)_updateCurrentPresentationController;
- (Class)_viewClassForSpriteAtIndex:(unsigned int)a0 inDecoratingLayout:(id)a1;
- (id)_viewUserDataForSpriteAtIndex:(unsigned int)a0 inDecoratingLayout:(id)a1;
- (double)alphaForShadowAtSpriteIndex:(unsigned int)a0 inLayout:(id)a1;
- (void)primaryItemDidChangeForStackItemsLayout:(id)a0;
- (id)regionOfInterestForTransitioningAssetReference:(id)a0;
- (void)scrollViewControllerWillEndScrolling:(id)a0 withVelocity:(struct CGPoint { double x0; double x1; })a1 targetContentOffset:(inout struct CGPoint { double x0; double x1; } *)a2 currentContentOffset:(struct CGPoint { double x0; double x1; })a3;
- (double)solidColorOverlayAlphaForSpriteIndex:(unsigned int)a0 inLayout:(id)a1;
- (id)solidColorOverlayForLayout:(id)a0;
- (BOOL)stackItemsLayout:(id)a0 itemHasTapback:(long long)a1;
- (id)videoPresentationControllerForDisplayAsset:(id)a0 spriteIndex:(unsigned int)a1 inLayout:(id)a2;

@end