60760b8b3d
- Combined MPExpression and MPMutableExpression - Abstracted children of MPExpression into MPExpressionElement protocol - Abstracted most of MPExpressionLayout and MPFunctionLayout into common superclass MPLayout
84 lines
2.7 KiB
Objective-C
84 lines
2.7 KiB
Objective-C
//
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// MPExpression.h
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// MathPad
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//
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// Created by Kim Wittenburg on 10.08.14.
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// Copyright (c) 2014 Kim Wittenburg. All rights reserved.
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//
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@import Foundation;
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#import "NSString+MPExpressionElement.h"
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@class MPExpression, MPFunction, MPRangePath;
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@protocol MPExpressionElement;
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@interface MPExpression : NSObject <NSCopying, NSCoding>
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#pragma mark Creation Methods
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- (instancetype)init; // Convenience
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- (instancetype)initWithElement:(id<MPExpressionElement>)element; // Convenience
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- (instancetype)initWithElements:(NSArray *)elements; // Designated Initializer
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#pragma mark Working With the Expression Tree
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@property (nonatomic, weak) MPFunction *parent; // Set automatically, nil for root expression
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- (void)fixElements; // Called automatically, removes empty elements, joins subsequent strings
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#pragma mark Primitive Methods
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- (NSUInteger)length;
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- (NSUInteger)numberOfElements;
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- (id<MPExpressionElement>)elementAtIndex:(NSUInteger)index;
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- (NSArray *)elementsInRange:(NSRange)range;
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- (NSUInteger)indexOfElement:(id<MPExpressionElement>)element;
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- (void)replaceElementsInRange:(NSRange)range withElements:(NSArray *)elements;
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// TODO: - (NSUInteger)indexOfElementAtLocation:(NSUInteger)location;
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- (double)doubleValue; // Evaluates Expression
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#pragma mark Notifications
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// All notification methods should create a new rangePath with the receiver's index added to the beginning of the path and then ascend the message to it's parent
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// TODO: More notifications
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- (void)didChangeElementsInRangePath:(MPRangePath *)rangePath
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replacementLength:(NSUInteger)replacementLength;
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#pragma mark Basic NSObject Methods
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- (BOOL)isEqualToExpression:(MPExpression *)anExpression;
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- (NSString *)description;
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- (NSUInteger)hash;
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@end
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@interface MPExpression (MPExpressionExtension)
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#pragma mark Working With the Expression Tree
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- (id)elementAtIndexPath:(NSIndexPath *)indexPath; // Returns an MPExpression or id<MPExpressionElement>
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- (NSArray *)elementsInRangePath:(MPRangePath *)rangePath;
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#pragma mark Working With Expressions
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- (MPExpression *)subexpressionFromLocation:(NSUInteger)from;
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- (MPExpression *)subexpressionToLocation:(NSUInteger)to;
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- (MPExpression *)subexpressionWithRange:(NSRange)range;
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#pragma mark Mutating Expressions
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- (void)appendElement:(id<MPExpressionElement>)anElement;
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- (void)appendElements:(NSArray *)elements;
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- (void)insertElement:(id<MPExpressionElement>)anElement atLocation:(NSUInteger)index;
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- (void)insertElements:(NSArray *)elements atLocation:(NSUInteger)index;
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- (void)deleteElementsInRange:(NSRange)range;
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#pragma mark Evaluating Expressions
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- (float)floatValue;
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- (int)intValue;
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- (NSInteger)integerValue;
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- (long long)longLongValue;
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#pragma mark Querying Expressions
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- (NSArray *)elements;
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@end
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