Add minimum viable product

Headers/CALayer.h

@@ -0,0 +1,18 @@
+//
+//  CALayer.h
+//  ScreenShredder
+//
+//  Created by Spotlight Deveaux on 2021-11-14.
+//
+
+#ifndef CALayer_h
+#define CALayer_h
+
+@import QuartzCore;
+#import "CAState.h"
+
+@interface CALayer (PrivateDefinitions)
+@property(readonly) NSArray<CAState *> *_Nonnull states;
+@end
+
+#endif /* CALayer_h */

Headers/CAPackage.h

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+//
+//  CAPackage.h
+//  ScreenShredder
+//
+//  Created by Spotlight Deveaux on 2021-11-14.
+//
+
+#ifndef CAPackage_h
+#define CAPackage_h
+
+@import QuartzCore;
+
+extern NSString *_Nonnull kCAPackageTypeArchive;
+
+@interface CAPackage : NSObject
+
++ (CAPackage *_Nullable)packageWithContentsOfURL:(NSURL *_Nonnull)url
+                                            type:(NSString *_Nonnull)type
+                                         options:(NSDictionary *_Nullable)opts
+                                           error:(NSError *_Nullable *_Nullable)
+                                                     outError;
+
+- (NSArray<NSString *> *_Nonnull)publishedObjectNames;
+- (CALayer *_Nullable)publishedObjectWithName:(NSString *_Nonnull)name;
+
+@property(readonly, getter=isGeometryFlipped) BOOL geometryFlipped;
+@property(readonly) CALayer *_Nonnull rootLayer;
+
+@end
+
+#endif /* CAPackage_h */

Headers/CAState.h

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+//
+//  CAState.h
+//  ScreenShredder
+//
+//  Created by Spotlight Deveaux on 2021-11-14.
+//
+
+#ifndef CAState_h
+#define CAState_h
+
+@import QuartzCore;
+
+@interface CAState : NSObject
+
+// We most likely don't need to define its methods, as we use none directly.
+// Instead, we define this solely for type checking.
+// (I apologize if you were looking for them here.)
+
+@end
+
+#endif /* CAState_h */

Headers/CAStateController.h

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+//
+//  CAStateController.h
+//  ScreenShredder
+//
+//  Created by Spotlight Deveaux on 2021-11-14.
+//
+
+#ifndef CAStateController_h
+#define CAStateController_h
+
+@import QuartzCore;
+#import "CAState.h"
+
+@interface CAStateController : NSObject
+
+// TODO: Do we need to bother with delegates?
+//@property(__weak) NSObject *<CAStateControllerDelegate> delegate;
+//- (NSObject *<CAStateControllerDelegate>)delegate;
+//- (void)setDelegate:(NSObject *<CAStateControllerDelegate>)delegate;
+- (CALayer *_Nullable)layer;
+- (void)_removeTransition:(id _Nonnull)arg1 layer:(CALayer *_Nonnull)arg2;
+- (CAStateController *_Nonnull)initWithLayer:(CALayer *_Nonnull)layer;
+- (CAState *_Nonnull)stateOfLayer:(CALayer *_Nonnull)arg1;
+- (void)setState:(CAState *_Nonnull)state
+            ofLayer:(CALayer *_Nonnull)layer
+    transitionSpeed:(float)speed;
+- (void)setState:(CAState *_Nonnull)state ofLayer:(CALayer *_Nonnull)layer;
+- (void)setInitialStatesOfLayer:(CALayer *_Nonnull)layer
+                transitionSpeed:(float)speed;
+- (void)setInitialStatesOfLayer:(CALayer *_Nonnull)layer;
+
+// TODO: What type is id in the beneath here?
+- (id _Nonnull)removeAllStateChanges;
+- (void)restoreStateChanges:(id _Nonnull)arg1;
+- (void)cancelTimers;
+- (void)_nextStateTimer:(id _Nonnull)arg1;
+- (void)_addAnimation:(id _Nonnull)arg1
+               forKey:(id _Nonnull)arg2
+               target:(id _Nonnull)arg3
+                 undo:(id _Nonnull)arg4;
+@end
+
+#endif /* CAStateController_h */