fa499d299c
Added MPDisplayExtension Category to MPExpression and MPFunction Added Methods to Invalidate the Cache to MPExpressionLayout and MPFunctionLayout
38 lines
1005 B
Objective-C
38 lines
1005 B
Objective-C
//
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// NSIndexPath+MPRemoveFirstIndex.m
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// MathPad
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//
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// Created by Kim Wittenburg on 23.04.14.
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// Copyright (c) 2014 Kim Wittenburg. All rights reserved.
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//
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#import "NSIndexPath+MPReverseIndexPath.h"
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@implementation NSIndexPath (MPReverseIndexPath)
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- (NSIndexPath *)indexPathByRemovingFirstIndex
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{
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if (self.length <= 1) {
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return [[NSIndexPath alloc] init];
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}
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NSUInteger indexes[self.length];
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[self getIndexes:indexes];
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NSUInteger newIndexes[self.length-1];
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for (NSUInteger i = 0; i < self.length-1; i++) {
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newIndexes[i] = indexes[i+1];
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}
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return [[NSIndexPath alloc] initWithIndexes:newIndexes length:self.length-1];
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}
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- (NSIndexPath *)indexPathByPrecedingIndex:(NSUInteger)index
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{
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NSUInteger newIndexes[self.length+1];
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newIndexes[0] = index;
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for (NSUInteger i = 0; i < self.length; i++) {
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newIndexes[i+1] = [self indexAtPosition:i];
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}
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return [[NSIndexPath alloc] initWithIndexes:newIndexes length:self.length+1];
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}
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@end
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