blob: 098d291c6c2ba115606791756512278d8147ed40 [file] [log] [blame]
// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#import "FWFObjectHostApi.h"
#import <objc/runtime.h>
#import "FWFDataConverters.h"
#import "FWFURLHostApi.h"
@interface FWFObjectFlutterApiImpl ()
// BinaryMessenger must be weak to prevent a circular reference with the host API it
// references.
@property(nonatomic, weak) id<FlutterBinaryMessenger> binaryMessenger;
// InstanceManager must be weak to prevent a circular reference with the object it stores.
@property(nonatomic, weak) FWFInstanceManager *instanceManager;
@end
@implementation FWFObjectFlutterApiImpl
- (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
instanceManager:(FWFInstanceManager *)instanceManager {
self = [self initWithBinaryMessenger:binaryMessenger];
if (self) {
_binaryMessenger = binaryMessenger;
_instanceManager = instanceManager;
}
return self;
}
- (long)identifierForObject:(NSObject *)instance {
return [self.instanceManager identifierWithStrongReferenceForInstance:instance];
}
- (void)observeValueForObject:(NSObject *)instance
keyPath:(NSString *)keyPath
object:(NSObject *)object
change:(NSDictionary<NSKeyValueChangeKey, id> *)change
completion:(void (^)(FlutterError *_Nullable))completion {
NSMutableArray<FWFNSKeyValueChangeKeyEnumData *> *changeKeys = [NSMutableArray array];
NSMutableArray<id> *changeValues = [NSMutableArray array];
[change enumerateKeysAndObjectsUsingBlock:^(NSKeyValueChangeKey key, id value, BOOL *stop) {
[changeKeys addObject:FWFNSKeyValueChangeKeyEnumDataFromNativeNSKeyValueChangeKey(key)];
BOOL isIdentifier = NO;
if ([self.instanceManager containsInstance:value]) {
isIdentifier = YES;
} else if (object_getClass(value) == [NSURL class]) {
FWFURLFlutterApiImpl *flutterApi =
[[FWFURLFlutterApiImpl alloc] initWithBinaryMessenger:self.binaryMessenger
instanceManager:self.instanceManager];
[flutterApi create:value
completion:^(FlutterError *error) {
NSAssert(!error, @"%@", error);
}];
isIdentifier = YES;
}
id returnValue = isIdentifier
? @([self.instanceManager identifierWithStrongReferenceForInstance:value])
: value;
[changeValues addObject:[FWFObjectOrIdentifier makeWithValue:returnValue
isIdentifier:isIdentifier]];
}];
NSInteger objectIdentifier =
[self.instanceManager identifierWithStrongReferenceForInstance:object];
[self observeValueForObjectWithIdentifier:[self identifierForObject:instance]
keyPath:keyPath
objectIdentifier:objectIdentifier
changeKeys:changeKeys
changeValues:changeValues
completion:completion];
}
@end
@implementation FWFObject
- (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
instanceManager:(FWFInstanceManager *)instanceManager {
self = [self init];
if (self) {
_objectApi = [[FWFObjectFlutterApiImpl alloc] initWithBinaryMessenger:binaryMessenger
instanceManager:instanceManager];
}
return self;
}
- (void)observeValueForKeyPath:(NSString *)keyPath
ofObject:(id)object
change:(NSDictionary<NSKeyValueChangeKey, id> *)change
context:(void *)context {
[self.objectApi observeValueForObject:self
keyPath:keyPath
object:object
change:change
completion:^(FlutterError *error) {
NSAssert(!error, @"%@", error);
}];
}
@end
@interface FWFObjectHostApiImpl ()
// InstanceManager must be weak to prevent a circular reference with the object it stores.
@property(nonatomic, weak) FWFInstanceManager *instanceManager;
@end
@implementation FWFObjectHostApiImpl
- (instancetype)initWithInstanceManager:(FWFInstanceManager *)instanceManager {
self = [self init];
if (self) {
_instanceManager = instanceManager;
}
return self;
}
- (NSObject *)objectForIdentifier:(NSInteger)identifier {
return (NSObject *)[self.instanceManager instanceForIdentifier:identifier];
}
- (void)addObserverForObjectWithIdentifier:(NSInteger)identifier
observerIdentifier:(NSInteger)observer
keyPath:(nonnull NSString *)keyPath
options:
(nonnull NSArray<FWFNSKeyValueObservingOptionsEnumData *> *)
options
error:(FlutterError *_Nullable *_Nonnull)error {
NSKeyValueObservingOptions optionsInt = 0;
for (FWFNSKeyValueObservingOptionsEnumData *data in options) {
optionsInt |= FWFNativeNSKeyValueObservingOptionsFromEnumData(data);
}
[[self objectForIdentifier:identifier] addObserver:[self objectForIdentifier:observer]
forKeyPath:keyPath
options:optionsInt
context:nil];
}
- (void)removeObserverForObjectWithIdentifier:(NSInteger)identifier
observerIdentifier:(NSInteger)observer
keyPath:(nonnull NSString *)keyPath
error:(FlutterError *_Nullable *_Nonnull)error {
[[self objectForIdentifier:identifier] removeObserver:[self objectForIdentifier:observer]
forKeyPath:keyPath];
}
- (void)disposeObjectWithIdentifier:(NSInteger)identifier
error:(FlutterError *_Nullable *_Nonnull)error {
[self.instanceManager removeInstanceWithIdentifier:identifier];
}
@end