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//
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// FLEXPropertyAttributes.m
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// FLEX
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//
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// Derived from MirrorKit.
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// Created by Tanner on 7/5/15.
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// Copyright (c) 2020 FLEX Team. All rights reserved.
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//
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#import "FLEXPropertyAttributes.h"
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#import "FLEXRuntimeUtility.h"
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#import "NSString+ObjcRuntime.h"
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#import "NSDictionary+ObjcRuntime.h"
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#pragma mark FLEXPropertyAttributes
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@interface FLEXPropertyAttributes ()
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@property (nonatomic) NSString *backingIvar;
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@property (nonatomic) NSString *typeEncoding;
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@property (nonatomic) NSString *oldTypeEncoding;
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@property (nonatomic) SEL customGetter;
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@property (nonatomic) SEL customSetter;
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@property (nonatomic) BOOL isReadOnly;
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@property (nonatomic) BOOL isCopy;
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@property (nonatomic) BOOL isRetained;
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@property (nonatomic) BOOL isNonatomic;
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@property (nonatomic) BOOL isDynamic;
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@property (nonatomic) BOOL isWeak;
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@property (nonatomic) BOOL isGarbageCollectable;
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- (NSString *)buildFullDeclaration;
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@end
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@implementation FLEXPropertyAttributes
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@synthesize list = _list;
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#pragma mark Initializers
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+ (instancetype)attributesForProperty:(objc_property_t)property {
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return [self attributesFromDictionary:[NSDictionary attributesDictionaryForProperty:property]];
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}
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+ (instancetype)attributesFromDictionary:(NSDictionary *)attributes {
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return [[self alloc] initWithAttributesDictionary:attributes];
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}
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- (id)initWithAttributesDictionary:(NSDictionary *)attributes {
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NSParameterAssert(attributes);
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self = [super init];
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if (self) {
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_dictionary = attributes;
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_string = attributes.propertyAttributesString;
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_count = attributes.count;
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_typeEncoding = attributes[kFLEXPropertyAttributeKeyTypeEncoding];
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_backingIvar = attributes[kFLEXPropertyAttributeKeyBackingIvarName];
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_oldTypeEncoding = attributes[kFLEXPropertyAttributeKeyOldStyleTypeEncoding];
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_customGetterString = attributes[kFLEXPropertyAttributeKeyCustomGetter];
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_customSetterString = attributes[kFLEXPropertyAttributeKeyCustomSetter];
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_customGetter = NSSelectorFromString(_customGetterString);
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_customSetter = NSSelectorFromString(_customSetterString);
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_isReadOnly = attributes[kFLEXPropertyAttributeKeyReadOnly] != nil;
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_isCopy = attributes[kFLEXPropertyAttributeKeyCopy] != nil;
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_isRetained = attributes[kFLEXPropertyAttributeKeyRetain] != nil;
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_isNonatomic = attributes[kFLEXPropertyAttributeKeyNonAtomic] != nil;
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_isWeak = attributes[kFLEXPropertyAttributeKeyWeak] != nil;
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_isGarbageCollectable = attributes[kFLEXPropertyAttributeKeyGarbageCollectable] != nil;
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_fullDeclaration = [self buildFullDeclaration];
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}
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return self;
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}
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#pragma mark Misc
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- (NSString *)description {
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return [NSString
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stringWithFormat:@"<%@ \"%@\", ivar=%@, readonly=%d, nonatomic=%d, getter=%@, setter=%@>",
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NSStringFromClass(self.class),
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self.string,
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self.backingIvar ?: @"none",
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self.isReadOnly,
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self.isNonatomic,
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NSStringFromSelector(self.customGetter) ?: @"none",
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NSStringFromSelector(self.customSetter) ?: @"none"
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];
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}
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- (objc_property_attribute_t *)copyAttributesList:(unsigned int *)attributesCount {
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NSDictionary *attrs = self.string.propertyAttributes;
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objc_property_attribute_t *propertyAttributes = malloc(attrs.count * sizeof(objc_property_attribute_t));
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if (attributesCount) {
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*attributesCount = (unsigned int)attrs.count;
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}
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NSUInteger i = 0;
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for (NSString *key in attrs.allKeys) {
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FLEXPropertyAttribute c = (FLEXPropertyAttribute)[key characterAtIndex:0];
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switch (c) {
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case FLEXPropertyAttributeTypeEncoding: {
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objc_property_attribute_t pa = {
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kFLEXPropertyAttributeKeyTypeEncoding.UTF8String,
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self.typeEncoding.UTF8String
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};
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propertyAttributes[i] = pa;
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break;
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}
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case FLEXPropertyAttributeBackingIvarName: {
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objc_property_attribute_t pa = {
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kFLEXPropertyAttributeKeyBackingIvarName.UTF8String,
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self.backingIvar.UTF8String
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};
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propertyAttributes[i] = pa;
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break;
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}
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case FLEXPropertyAttributeCopy: {
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objc_property_attribute_t pa = {kFLEXPropertyAttributeKeyCopy.UTF8String, ""};
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propertyAttributes[i] = pa;
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break;
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}
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case FLEXPropertyAttributeCustomGetter: {
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objc_property_attribute_t pa = {
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kFLEXPropertyAttributeKeyCustomGetter.UTF8String,
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NSStringFromSelector(self.customGetter).UTF8String ?: ""
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};
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propertyAttributes[i] = pa;
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break;
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}
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case FLEXPropertyAttributeCustomSetter: {
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objc_property_attribute_t pa = {
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kFLEXPropertyAttributeKeyCustomSetter.UTF8String,
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NSStringFromSelector(self.customSetter).UTF8String ?: ""
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};
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propertyAttributes[i] = pa;
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break;
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}
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case FLEXPropertyAttributeDynamic: {
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objc_property_attribute_t pa = {kFLEXPropertyAttributeKeyDynamic.UTF8String, ""};
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propertyAttributes[i] = pa;
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break;
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}
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case FLEXPropertyAttributeGarbageCollectible: {
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objc_property_attribute_t pa = {kFLEXPropertyAttributeKeyGarbageCollectable.UTF8String, ""};
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propertyAttributes[i] = pa;
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break;
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}
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case FLEXPropertyAttributeNonAtomic: {
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objc_property_attribute_t pa = {kFLEXPropertyAttributeKeyNonAtomic.UTF8String, ""};
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propertyAttributes[i] = pa;
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break;
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}
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case FLEXPropertyAttributeOldTypeEncoding: {
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objc_property_attribute_t pa = {
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kFLEXPropertyAttributeKeyOldStyleTypeEncoding.UTF8String,
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self.oldTypeEncoding.UTF8String ?: ""
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};
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propertyAttributes[i] = pa;
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break;
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}
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case FLEXPropertyAttributeReadOnly: {
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objc_property_attribute_t pa = {kFLEXPropertyAttributeKeyReadOnly.UTF8String, ""};
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propertyAttributes[i] = pa;
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break;
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}
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case FLEXPropertyAttributeRetain: {
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objc_property_attribute_t pa = {kFLEXPropertyAttributeKeyRetain.UTF8String, ""};
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propertyAttributes[i] = pa;
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break;
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}
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case FLEXPropertyAttributeWeak: {
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objc_property_attribute_t pa = {kFLEXPropertyAttributeKeyWeak.UTF8String, ""};
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propertyAttributes[i] = pa;
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break;
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}
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}
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i++;
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}
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return propertyAttributes;
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}
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- (objc_property_attribute_t *)list {
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if (!_list) {
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_list = [self copyAttributesList:nil];
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}
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return _list;
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}
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- (NSString *)buildFullDeclaration {
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NSMutableString *decl = [NSMutableString new];
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[decl appendFormat:@"%@, ", _isNonatomic ? @"nonatomic" : @"atomic"];
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[decl appendFormat:@"%@, ", _isReadOnly ? @"readonly" : @"readwrite"];
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BOOL noExplicitMemorySemantics = YES;
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if (_isCopy) { noExplicitMemorySemantics = NO;
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[decl appendString:@"copy, "];
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}
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if (_isRetained) { noExplicitMemorySemantics = NO;
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[decl appendString:@"strong, "];
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}
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if (_isWeak) { noExplicitMemorySemantics = NO;
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[decl appendString:@"weak, "];
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}
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if ([_typeEncoding hasPrefix:@"@"] && noExplicitMemorySemantics) {
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// *probably* strong if this is an object; strong is the default.
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[decl appendString:@"strong, "];
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} else if (noExplicitMemorySemantics) {
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// *probably* assign if this is not an object
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[decl appendString:@"assign, "];
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}
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if (_customGetter) {
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[decl appendFormat:@"getter=%@, ", NSStringFromSelector(_customGetter)];
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}
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if (_customSetter) {
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[decl appendFormat:@"setter=%@, ", NSStringFromSelector(_customSetter)];
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}
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[decl deleteCharactersInRange:NSMakeRange(decl.length-2, 2)];
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return decl.copy;
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}
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- (void)dealloc {
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if (_list) {
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free(_list);
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_list = nil;
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}
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}
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#pragma mark Copying
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- (id)copyWithZone:(NSZone *)zone {
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return [[FLEXPropertyAttributes class] attributesFromDictionary:self.dictionary];
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}
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- (id)mutableCopyWithZone:(NSZone *)zone {
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return [[FLEXMutablePropertyAttributes class] attributesFromDictionary:self.dictionary];
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}
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@end
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#pragma mark FLEXMutablePropertyAttributes
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@interface FLEXMutablePropertyAttributes ()
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@property (nonatomic) BOOL countDelta;
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@property (nonatomic) BOOL stringDelta;
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@property (nonatomic) BOOL dictDelta;
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@property (nonatomic) BOOL listDelta;
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@property (nonatomic) BOOL declDelta;
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@end
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#define PropertyWithDeltaFlag(type, name, Name) @dynamic name; \
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- (void)set ## Name:(type)name { \
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if (name != _ ## name) { \
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_countDelta = _stringDelta = _dictDelta = _listDelta = _declDelta = YES; \
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_ ## name = name; \
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} \
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}
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@implementation FLEXMutablePropertyAttributes
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PropertyWithDeltaFlag(NSString *, backingIvar, BackingIvar);
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PropertyWithDeltaFlag(NSString *, typeEncoding, TypeEncoding);
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PropertyWithDeltaFlag(NSString *, oldTypeEncoding, OldTypeEncoding);
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PropertyWithDeltaFlag(SEL, customGetter, CustomGetter);
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PropertyWithDeltaFlag(SEL, customSetter, CustomSetter);
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PropertyWithDeltaFlag(BOOL, isReadOnly, IsReadOnly);
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PropertyWithDeltaFlag(BOOL, isCopy, IsCopy);
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PropertyWithDeltaFlag(BOOL, isRetained, IsRetained);
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PropertyWithDeltaFlag(BOOL, isNonatomic, IsNonatomic);
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PropertyWithDeltaFlag(BOOL, isDynamic, IsDynamic);
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PropertyWithDeltaFlag(BOOL, isWeak, IsWeak);
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PropertyWithDeltaFlag(BOOL, isGarbageCollectable, IsGarbageCollectable);
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+ (instancetype)attributes {
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return [self new];
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}
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- (void)setTypeEncodingChar:(char)type {
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self.typeEncoding = [NSString stringWithFormat:@"%c", type];
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}
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- (NSUInteger)count {
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// Recalculate attribute count after mutations
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if (self.countDelta) {
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self.countDelta = NO;
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_count = self.dictionary.count;
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}
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return _count;
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}
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- (objc_property_attribute_t *)list {
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// Regenerate list after mutations
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if (self.listDelta) {
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self.listDelta = NO;
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if (_list) {
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free(_list);
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_list = nil;
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}
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}
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// Super will generate the list if it isn't set
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return super.list;
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}
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- (NSString *)string {
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// Regenerate string after mutations
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if (self.stringDelta || !_string) {
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self.stringDelta = NO;
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_string = self.dictionary.propertyAttributesString;
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}
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return _string;
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}
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- (NSDictionary *)dictionary {
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// Regenerate dictionary after mutations
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if (self.dictDelta || !_dictionary) {
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// _stringa nd _dictionary depend on each other,
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// so we must generate ONE by hand using our properties.
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// We arbitrarily choose to generate the dictionary.
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NSMutableDictionary *attrs = [NSMutableDictionary new];
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if (self.typeEncoding)
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attrs[kFLEXPropertyAttributeKeyTypeEncoding] = self.typeEncoding;
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if (self.backingIvar)
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attrs[kFLEXPropertyAttributeKeyBackingIvarName] = self.backingIvar;
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if (self.oldTypeEncoding)
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attrs[kFLEXPropertyAttributeKeyOldStyleTypeEncoding] = self.oldTypeEncoding;
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if (self.customGetter)
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attrs[kFLEXPropertyAttributeKeyCustomGetter] = NSStringFromSelector(self.customGetter);
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if (self.customSetter)
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attrs[kFLEXPropertyAttributeKeyCustomSetter] = NSStringFromSelector(self.customSetter);
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if (self.isReadOnly) attrs[kFLEXPropertyAttributeKeyReadOnly] = @YES;
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if (self.isCopy) attrs[kFLEXPropertyAttributeKeyCopy] = @YES;
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if (self.isRetained) attrs[kFLEXPropertyAttributeKeyRetain] = @YES;
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if (self.isNonatomic) attrs[kFLEXPropertyAttributeKeyNonAtomic] = @YES;
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if (self.isDynamic) attrs[kFLEXPropertyAttributeKeyDynamic] = @YES;
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if (self.isWeak) attrs[kFLEXPropertyAttributeKeyWeak] = @YES;
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if (self.isGarbageCollectable) attrs[kFLEXPropertyAttributeKeyGarbageCollectable] = @YES;
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_dictionary = attrs.copy;
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}
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return _dictionary;
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}
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- (NSString *)fullDeclaration {
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if (self.declDelta || !_fullDeclaration) {
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_declDelta = NO;
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_fullDeclaration = [self buildFullDeclaration];
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}
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return _fullDeclaration;
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}
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- (NSString *)customGetterString {
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return _customGetter ? NSStringFromSelector(_customGetter) : nil;
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}
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- (NSString *)customSetterString {
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return _customSetter ? NSStringFromSelector(_customSetter) : nil;
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}
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@end
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