//
//  MPDrawable.h
//  MathPad
//
//  Created by Kim Wittenburg on 07.08.14.
//  Copyright (c) 2014 Kim Wittenburg. All rights reserved.
//

@import Cocoa;
#import "MPExpressionStorage.h"

#define MPNull [NSNull null]

@interface MPLayout : NSObject

#pragma mark Creation Methods
- (instancetype)init;
- (instancetype)initWithPath:(NSIndexPath *)path
                      parent:(MPLayout *)parent;

#pragma mark Text System Objects
@property (readonly, nonatomic, weak) MPExpressionStorage *expressionStorage;
@property (readonly, nonatomic, weak) NSLayoutManager *layoutManager;
@property (readonly, nonatomic, weak) NSTextContainer *textContainer;
@property (readonly, nonatomic, weak) NSTextStorage *textStorage;

#pragma mark Cache Tree
@property (readonly, nonatomic, weak) MPLayout *parent;
@property (readonly, nonatomic, strong) NSIndexPath *path;

#pragma mark Cache Methods
// Querying Caches
- (id)cachableObjectForIndex:(NSUInteger)index
                   generator:(id(^)())generator;

// Clearing Caches
- (void)clearCacheInRange:(NSRange)range
        replacementLength:(NSUInteger)replacementLength;
- (void)invalidate;

#pragma mark Calculation and Drawing Methods
// @property (nonatomic) BOOL usesSmallSize;
- (NSSize)size;

- (NSBezierPath *)bezierPath;
- (NSBezierPath *)bezierPathAtOrigin:(NSPoint)point;

- (void)drawAtPoint:(NSPoint)point;

@end

@interface MPLayout (MPSubclassImplement)
- (MPLayout *)childLayoutAtIndex:(NSUInteger)index; // To be implemented
- (NSSize)sizeForChildAtIndex:(NSUInteger)index; // To be implemented
- (NSBezierPath *)generateBezierPath; // To be implemented
@end