react-native/React/Views/RCTComponentData.m

322 lines
10 KiB
Objective-C

/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
#import "RCTComponentData.h"
#import <objc/message.h>
#import "RCTBridge.h"
#import "RCTShadowView.h"
#import "RCTViewManager.h"
typedef void (^RCTPropBlock)(id<RCTComponent> view, id json);
@interface RCTComponentProp : NSObject
@property (nonatomic, copy, readonly) NSString *type;
@property (nonatomic, copy) RCTPropBlock propBlock;
@end
@implementation RCTComponentProp
- (instancetype)initWithType:(NSString *)type
{
if ((self = [super init])) {
_type = [type copy];
}
return self;
}
@end
@implementation RCTComponentData
{
id<RCTComponent> _defaultView;
RCTShadowView *_defaultShadowView;
NSMutableDictionary *_viewPropBlocks;
NSMutableDictionary *_shadowPropBlocks;
}
- (instancetype)initWithManager:(RCTViewManager *)manager
{
if ((self = [super init])) {
_manager = manager;
_viewPropBlocks = [[NSMutableDictionary alloc] init];
_shadowPropBlocks = [[NSMutableDictionary alloc] init];
_name = RCTBridgeModuleNameForClass([manager class]);
RCTAssert(_name.length, @"Invalid moduleName '%@'", _name);
if ([_name hasSuffix:@"Manager"]) {
_name = [_name substringToIndex:_name.length - @"Manager".length];
}
}
return self;
}
RCT_NOT_IMPLEMENTED(-init)
- (id<RCTComponent>)createViewWithTag:(NSNumber *)tag
{
RCTAssertMainThread();
id<RCTComponent> view = (id<RCTComponent>)[_manager view];
view.reactTag = tag;
if ([view isKindOfClass:[UIView class]]) {
((UIView *)view).multipleTouchEnabled = YES;
((UIView *)view).userInteractionEnabled = YES; // required for touch handling
((UIView *)view).layer.allowsGroupOpacity = YES; // required for touch handling
}
return view;
}
- (RCTShadowView *)createShadowViewWithTag:(NSNumber *)tag
{
RCTShadowView *shadowView = [_manager shadowView];
shadowView.reactTag = tag;
shadowView.viewName = _name;
return shadowView;
}
- (RCTPropBlock)propBlockForKey:(NSString *)name defaultView:(id)defaultView
{
BOOL shadowView = [defaultView isKindOfClass:[RCTShadowView class]];
NSMutableDictionary *propBlocks = shadowView ? _shadowPropBlocks : _viewPropBlocks;
RCTPropBlock propBlock = propBlocks[name];
if (!propBlock) {
__weak RCTComponentData *weakSelf = self;
// Get type
SEL type = NULL;
NSString *keyPath = nil;
SEL selector = NSSelectorFromString([NSString stringWithFormat:@"propConfig%@_%@", shadowView ? @"Shadow" : @"", name]);
Class managerClass = [_manager class];
if ([managerClass respondsToSelector:selector]) {
NSArray *typeAndKeyPath = ((NSArray *(*)(id, SEL))objc_msgSend)(managerClass, selector);
type = NSSelectorFromString([typeAndKeyPath[0] stringByAppendingString:@":"]);
keyPath = typeAndKeyPath.count > 1 ? typeAndKeyPath[1] : nil;
} else {
propBlock = ^(__unused id view, __unused id json) {};
propBlocks[name] = propBlock;
return propBlock;
}
// Check for custom setter
if ([keyPath isEqualToString:@"__custom__"]) {
// Get custom setter
SEL customSetter = NSSelectorFromString([NSString stringWithFormat:@"set_%@:for%@View:withDefaultView:", name, shadowView ? @"Shadow" : @""]);
propBlock = ^(id<RCTComponent> view, id json) {
((void (*)(id, SEL, id, id, id))objc_msgSend)(
weakSelf.manager, customSetter, json == (id)kCFNull ? nil : json, view, defaultView
);
};
} else {
// Disect keypath
NSString *key = name;
NSArray *parts = [keyPath componentsSeparatedByString:@"."];
if (parts) {
key = [parts lastObject];
parts = [parts subarrayWithRange:(NSRange){0, parts.count - 1}];
}
// Get property getter
SEL getter = NSSelectorFromString(key);
// Get property setter
SEL setter = NSSelectorFromString([NSString stringWithFormat:@"set%@%@:",
[[key substringToIndex:1] uppercaseString],
[key substringFromIndex:1]]);
// Build setter block
void (^setterBlock)(id target, id source, id json) = nil;
NSMethodSignature *typeSignature = [[RCTConvert class] methodSignatureForSelector:type];
switch (typeSignature.methodReturnType[0]) {
#define RCT_CASE(_value, _type) \
case _value: { \
_type (*convert)(id, SEL, id) = (typeof(convert))objc_msgSend; \
_type (*get)(id, SEL) = (typeof(get))objc_msgSend; \
void (*set)(id, SEL, _type) = (typeof(set))objc_msgSend; \
setterBlock = ^(id target, id source, id json) { \
set(target, setter, json ? convert([RCTConvert class], type, json) : get(source, getter)); \
}; \
break; \
}
RCT_CASE(_C_SEL, SEL)
RCT_CASE(_C_CHARPTR, const char *)
RCT_CASE(_C_CHR, char)
RCT_CASE(_C_UCHR, unsigned char)
RCT_CASE(_C_SHT, short)
RCT_CASE(_C_USHT, unsigned short)
RCT_CASE(_C_INT, int)
RCT_CASE(_C_UINT, unsigned int)
RCT_CASE(_C_LNG, long)
RCT_CASE(_C_ULNG, unsigned long)
RCT_CASE(_C_LNG_LNG, long long)
RCT_CASE(_C_ULNG_LNG, unsigned long long)
RCT_CASE(_C_FLT, float)
RCT_CASE(_C_DBL, double)
RCT_CASE(_C_BOOL, BOOL)
RCT_CASE(_C_PTR, void *)
RCT_CASE(_C_ID, id)
case _C_STRUCT_B:
default: {
NSInvocation *typeInvocation = [NSInvocation invocationWithMethodSignature:typeSignature];
[typeInvocation setSelector:type];
[typeInvocation setTarget:[RCTConvert class]];
__block NSInvocation *sourceInvocation = nil;
__block NSInvocation *targetInvocation = nil;
setterBlock = ^(id target, id source, id json) { \
// Get value
void *value = malloc(typeSignature.methodReturnLength);
if (json) {
[typeInvocation setArgument:&json atIndex:2];
[typeInvocation invoke];
[typeInvocation getReturnValue:value];
} else {
if (!sourceInvocation && source) {
NSMethodSignature *signature = [source methodSignatureForSelector:getter];
sourceInvocation = [NSInvocation invocationWithMethodSignature:signature];
[sourceInvocation setSelector:getter];
}
[sourceInvocation invokeWithTarget:source];
[sourceInvocation getReturnValue:value];
}
// Set value
if (!targetInvocation && target) {
NSMethodSignature *signature = [target methodSignatureForSelector:setter];
targetInvocation = [NSInvocation invocationWithMethodSignature:signature];
[targetInvocation setSelector:setter];
}
[targetInvocation setArgument:value atIndex:2];
[targetInvocation invokeWithTarget:target];
free(value);
};
break;
}
}
propBlock = ^(__unused id view, __unused id json) {
// Follow keypath
id target = view;
for (NSString *part in parts) {
target = [target valueForKey:part];
}
if (json == (id)kCFNull) {
// Copy default property
id source = defaultView;
for (NSString *part in parts) {
source = [source valueForKey:part];
}
setterBlock(target, source, nil);
} else {
// Set property with json
setterBlock(target, nil, json);
}
};
}
if (RCT_DEBUG) {
// Provide more useful log feedback if there's an error
RCTPropBlock unwrappedBlock = propBlock;
propBlock = ^(id<RCTComponent> view, id json) {
NSString *logPrefix = [NSString stringWithFormat:
@"Error setting property '%@' of %@ with tag #%@: ",
name, weakSelf.name, view.reactTag];
RCTPerformBlockWithLogPrefix(^{ unwrappedBlock(view, json); }, logPrefix);
};
}
propBlocks[name] = [propBlock copy];
}
return propBlock;
}
- (void)setProps:(NSDictionary *)props forView:(id<RCTComponent>)view
{
if (!view) {
return;
}
if (!_defaultView) {
_defaultView = [self createViewWithTag:nil];
}
[props enumerateKeysAndObjectsUsingBlock:^(NSString *key, id json, __unused BOOL *stop) {
[self propBlockForKey:key defaultView:_defaultView](view, json);
}];
}
- (void)setProps:(NSDictionary *)props forShadowView:(RCTShadowView *)shadowView
{
if (!shadowView) {
return;
}
if (!_defaultShadowView) {
_defaultShadowView = [self createShadowViewWithTag:nil];
}
[props enumerateKeysAndObjectsUsingBlock:^(NSString *key, id json, __unused BOOL *stop) {
[self propBlockForKey:key defaultView:_defaultShadowView](shadowView, json);
}];
[shadowView updateLayout];
}
- (NSDictionary *)viewConfig
{
Class managerClass = [_manager class];
NSMutableDictionary *propTypes = [[NSMutableDictionary alloc] init];
unsigned int count = 0;
Method *methods = class_copyMethodList(object_getClass(managerClass), &count);
for (unsigned int i = 0; i < count; i++) {
Method method = methods[i];
SEL selector = method_getName(method);
NSString *methodName = NSStringFromSelector(selector);
if ([methodName hasPrefix:@"propConfig"]) {
NSRange nameRange = [methodName rangeOfString:@"_"];
if (nameRange.length) {
NSString *name = [methodName substringFromIndex:nameRange.location + 1];
NSString *type = ((NSArray *(*)(id, SEL))objc_msgSend)(managerClass, selector)[0];
if (RCT_DEBUG && propTypes[name] && ![propTypes[name] isEqualToString:type]) {
RCTLogError(@"Property '%@' of component '%@' redefined from '%@' "
"to '%@'", name, _name, propTypes[name], type);
}
propTypes[name] = type;
}
}
}
free(methods);
return propTypes;
}
@end