//
//  MPRange.h
//  MathPad
//
//  Created by Kim Wittenburg on 18.04.14.
//  Copyright (c) 2014 Kim Wittenburg. All rights reserved.
//

#import "MPExpression.h"

@interface MPRangePath : NSObject <NSCopying, NSCoding>

#pragma mark Creation Methods

- (instancetype)init;
- (instancetype)initWithLocation:(NSIndexPath *)location
                          length:(NSUInteger)length;
- (instancetype)initWithRange:(NSRange)aRange;

+ (instancetype)emptyRangePath;
+ (instancetype)rangePathWithLocation:(NSIndexPath *)location
                           length:(NSUInteger)length;
+ (instancetype)rangePathWithRange:(NSRange)aRange;

#pragma mark Properties

@property (nonatomic, strong) NSIndexPath *location;
@property (nonatomic) NSUInteger length;

- (NSIndexPath *)maxRangePath;
- (NSRange)rangeAtLastIndex;

#pragma mark Working with Ranges

- (BOOL)containsRangePath:(MPRangePath *)aRangePath;
- (BOOL)containsLocation:(NSIndexPath *)location;

- (BOOL)isEqual:(id)object;
- (BOOL)isEqualToRangePath:(MPRangePath *)aRangePath;

@end

@interface MPExpression (MPRangeExtension)

- (MPExpression *)subexpressionWithRangePath:(MPRangePath *)aRangePath; // If location points to expression (in function) nil is returned

@end