react-native/React/Base/RCTUtils.m

288 lines
8.2 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 "RCTUtils.h"
#import <mach/mach_time.h>
#import <objc/runtime.h>
#import <UIKit/UIKit.h>
#import <CommonCrypto/CommonCrypto.h>
#import "RCTLog.h"
NSString *RCTJSONStringify(id jsonObject, NSError **error)
{
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:jsonObject options:(NSJSONWritingOptions)NSJSONReadingAllowFragments error:error];
return jsonData ? [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding] : nil;
}
id RCTJSONParseWithOptions(NSString *jsonString, NSError **error, NSJSONReadingOptions options)
{
if (!jsonString) {
return nil;
}
NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:NO];
if (!jsonData) {
jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
if (jsonData) {
RCTLogWarn(@"RCTJSONParse received the following string, which could not be losslessly converted to UTF8 data: '%@'", jsonString);
} else {
RCTLogError(@"RCTJSONParse received invalid UTF8 data");
return nil;
}
}
return [NSJSONSerialization JSONObjectWithData:jsonData options:options error:error];
}
id RCTJSONParse(NSString *jsonString, NSError **error) {
return RCTJSONParseWithOptions(jsonString, error, NSJSONReadingAllowFragments);
}
id RCTJSONParseMutable(NSString *jsonString, NSError **error) {
return RCTJSONParseWithOptions(jsonString, error, NSJSONReadingMutableContainers|NSJSONReadingMutableLeaves);
}
id RCTJSONClean(id object)
{
static dispatch_once_t onceToken;
static NSSet *validLeafTypes;
dispatch_once(&onceToken, ^{
validLeafTypes = [[NSSet alloc] initWithArray:@[
[NSString class],
[NSMutableString class],
[NSNumber class],
[NSNull class],
]];
});
if ([validLeafTypes containsObject:[object classForCoder]]) {
return object;
}
if ([object isKindOfClass:[NSDictionary class]]) {
__block BOOL copy = NO;
NSMutableDictionary *values = [[NSMutableDictionary alloc] initWithCapacity:[object count]];
[object enumerateKeysAndObjectsUsingBlock:^(NSString *key, id item, __unused BOOL *stop) {
id value = RCTJSONClean(item);
values[key] = value;
copy |= value != item;
}];
return copy ? values : object;
}
if ([object isKindOfClass:[NSArray class]]) {
__block BOOL copy = NO;
__block NSArray *values = object;
[object enumerateObjectsUsingBlock:^(id item, NSUInteger idx, __unused BOOL *stop) {
id value = RCTJSONClean(item);
if (copy) {
[(NSMutableArray *)values addObject:value];
} else if (value != item) {
// Converted value is different, so we'll need to copy the array
values = [[NSMutableArray alloc] initWithCapacity:values.count];
for (NSUInteger i = 0; i < idx; i++) {
[(NSMutableArray *)values addObject:object[i]];
}
[(NSMutableArray *)values addObject:value];
copy = YES;
}
}];
return values;
}
return (id)kCFNull;
}
NSString *RCTMD5Hash(NSString *string)
{
const char *str = [string UTF8String];
unsigned char result[CC_MD5_DIGEST_LENGTH];
CC_MD5(str, (CC_LONG)strlen(str), result);
return [NSString stringWithFormat:@"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
result[0], result[1], result[2], result[3],
result[4], result[5], result[6], result[7],
result[8], result[9], result[10], result[11],
result[12], result[13], result[14], result[15]
];
}
CGFloat RCTScreenScale()
{
static CGFloat scale;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
if (![NSThread isMainThread]) {
dispatch_sync(dispatch_get_main_queue(), ^{
scale = [UIScreen mainScreen].scale;
});
} else {
scale = [UIScreen mainScreen].scale;
}
});
return scale;
}
CGSize RCTScreenSize()
{
static CGSize size;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
if (![NSThread isMainThread]) {
dispatch_sync(dispatch_get_main_queue(), ^{
size = [UIScreen mainScreen].bounds.size;
});
} else {
size = [UIScreen mainScreen].bounds.size;
}
});
return size;
}
CGFloat RCTRoundPixelValue(CGFloat value)
{
CGFloat scale = RCTScreenScale();
return round(value * scale) / scale;
}
CGFloat RCTCeilPixelValue(CGFloat value)
{
CGFloat scale = RCTScreenScale();
return ceil(value * scale) / scale;
}
CGFloat RCTFloorPixelValue(CGFloat value)
{
CGFloat scale = RCTScreenScale();
return floor(value * scale) / scale;
}
void RCTSwapClassMethods(Class cls, SEL original, SEL replacement)
{
Method originalMethod = class_getClassMethod(cls, original);
IMP originalImplementation = method_getImplementation(originalMethod);
const char *originalArgTypes = method_getTypeEncoding(originalMethod);
Method replacementMethod = class_getClassMethod(cls, replacement);
IMP replacementImplementation = method_getImplementation(replacementMethod);
const char *replacementArgTypes = method_getTypeEncoding(replacementMethod);
if (class_addMethod(cls, original, replacementImplementation, replacementArgTypes))
{
class_replaceMethod(cls, replacement, originalImplementation, originalArgTypes);
}
else
{
method_exchangeImplementations(originalMethod, replacementMethod);
}
}
void RCTSwapInstanceMethods(Class cls, SEL original, SEL replacement)
{
Method originalMethod = class_getInstanceMethod(cls, original);
IMP originalImplementation = method_getImplementation(originalMethod);
const char *originalArgTypes = method_getTypeEncoding(originalMethod);
Method replacementMethod = class_getInstanceMethod(cls, replacement);
IMP replacementImplementation = method_getImplementation(replacementMethod);
const char *replacementArgTypes = method_getTypeEncoding(replacementMethod);
if (class_addMethod(cls, original, replacementImplementation, replacementArgTypes))
{
class_replaceMethod(cls, replacement, originalImplementation, originalArgTypes);
}
else
{
method_exchangeImplementations(originalMethod, replacementMethod);
}
}
BOOL RCTClassOverridesClassMethod(Class cls, SEL selector)
{
return RCTClassOverridesInstanceMethod(object_getClass(cls), selector);
}
BOOL RCTClassOverridesInstanceMethod(Class cls, SEL selector)
{
unsigned int numberOfMethods;
Method *methods = class_copyMethodList(cls, &numberOfMethods);
for (unsigned int i = 0; i < numberOfMethods; i++)
{
if (method_getName(methods[i]) == selector)
{
free(methods);
return YES;
}
}
free(methods);
return NO;
}
NSDictionary *RCTMakeError(NSString *message, id toStringify, NSDictionary *extraData)
{
if (toStringify) {
message = [NSString stringWithFormat:@"%@%@", message, toStringify];
}
NSMutableDictionary *error = [@{@"message": message} mutableCopy];
if (extraData) {
[error addEntriesFromDictionary:extraData];
}
return error;
}
NSDictionary *RCTMakeAndLogError(NSString *message, id toStringify, NSDictionary *extraData)
{
id error = RCTMakeError(message, toStringify, extraData);
RCTLogError(@"\nError: %@", error);
return error;
}
BOOL RCTRunningInTestEnvironment(void)
{
static BOOL _isTestEnvironment = NO;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
_isTestEnvironment = (NSClassFromString(@"SenTestCase") != nil || NSClassFromString(@"XCTest") != nil);
});
return _isTestEnvironment;
}
BOOL RCTImageHasAlpha(CGImageRef image)
{
switch (CGImageGetAlphaInfo(image)) {
case kCGImageAlphaNone:
case kCGImageAlphaNoneSkipLast:
case kCGImageAlphaNoneSkipFirst:
return NO;
default:
return YES;
}
}
NSError *RCTErrorWithMessage(NSString *message)
{
NSDictionary *errorInfo = @{NSLocalizedDescriptionKey: message};
NSError *error = [[NSError alloc] initWithDomain:RCTErrorDomain code:0 userInfo:errorInfo];
return error;
}
id RCTNullIfNil(id value)
{
return value ?: (id)kCFNull;
}
id RCTNilIfNull(id value)
{
return value == (id)kCFNull ? nil : value;
}