63 lines
1.6 KiB
Mathematica
63 lines
1.6 KiB
Mathematica
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// RABatchChangesEntity.m
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// RATreeView
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//
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// Created by Rafal Augustyniak on 17/11/15.
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// Copyright © 2015 Rafal Augustyniak. All rights reserved.
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//
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#import "RABatchChangeEntity.h"
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@implementation RABatchChangeEntity
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+ (instancetype)batchChangeEntityWithBlock:(void (^)())updates type:(RABatchChangeType)type ranking:(NSInteger)ranking
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{
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NSParameterAssert(updates);
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RABatchChangeEntity *entity = [RABatchChangeEntity new];
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entity.type = type;
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entity.ranking = ranking;
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entity.updatesBlock = updates;
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return entity;
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}
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- (NSComparisonResult)compare:(RABatchChangeEntity *)otherEntity
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{
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if ([self destructiveOperation]) {
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if (![otherEntity destructiveOperation]) {
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return NSOrderedAscending;
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} else {
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return [@(otherEntity.ranking) compare:@(self.ranking)];
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}
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} else if (self.type == RABatchChangeTypeItemMove && otherEntity.type != RABatchChangeTypeItemMove) {
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return [otherEntity destructiveOperation] ? NSOrderedAscending : NSOrderedDescending;
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} else if ([self constructiveOperation]) {
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if (![otherEntity constructiveOperation]) {
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return NSOrderedDescending;
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} else {
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return [@(self.ranking) compare:@(otherEntity.ranking)];
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}
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} else {
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return NSOrderedSame;
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}
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}
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- (BOOL)constructiveOperation
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{
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return self.type == RABatchChangeTypeItemRowExpansion
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|| self.type == RABatchChangeTypeItemRowInsertion;
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}
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- (BOOL)destructiveOperation
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{
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return self.type == RABatchChangeTypeItemRowCollapse
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|| self.type == RABatchChangeTypeItemRowDeletion;
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}
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@end
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