575 lines
20 KiB
Plaintext
575 lines
20 KiB
Plaintext
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import "RCTModuleMethod.h"
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#import <objc/message.h>
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#import "RCTAssert.h"
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#import "RCTBridge+Private.h"
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#import "RCTBridge.h"
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#import "RCTConvert.h"
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#import "RCTCxxConvert.h"
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#import "RCTLog.h"
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#import "RCTManagedPointer.h"
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#import "RCTParserUtils.h"
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#import "RCTProfile.h"
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#import "RCTUtils.h"
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typedef BOOL (^RCTArgumentBlock)(RCTBridge *, NSUInteger, id);
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/**
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* Get the converter function for the specified type
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*/
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static SEL selectorForType(NSString *type)
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{
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const char *input = type.UTF8String;
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return NSSelectorFromString([RCTParseType(&input) stringByAppendingString:@":"]);
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}
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@implementation RCTMethodArgument
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- (instancetype)initWithType:(NSString *)type
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nullability:(RCTNullability)nullability
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unused:(BOOL)unused
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{
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if (self = [super init]) {
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_type = [type copy];
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_nullability = nullability;
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_unused = unused;
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}
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return self;
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}
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@end
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@implementation RCTModuleMethod
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{
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Class _moduleClass;
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const RCTMethodInfo *_methodInfo;
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NSString *_JSMethodName;
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SEL _selector;
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NSInvocation *_invocation;
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NSArray<RCTArgumentBlock> *_argumentBlocks;
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NSMutableArray *_retainedObjects;
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}
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static void RCTLogArgumentError(RCTModuleMethod *method, NSUInteger index,
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id valueOrType, const char *issue)
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{
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RCTLogError(@"Argument %tu (%@) of %@.%s %s", index, valueOrType,
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RCTBridgeModuleNameForClass(method->_moduleClass),
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method.JSMethodName, issue);
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}
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RCT_NOT_IMPLEMENTED(- (instancetype)init)
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RCT_EXTERN_C_BEGIN
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// returns YES if the selector ends in a colon (indicating that there is at
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// least one argument, and maybe more selector parts) or NO if it doesn't.
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static BOOL RCTParseSelectorPart(const char **input, NSMutableString *selector)
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{
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NSString *selectorPart;
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if (RCTParseSelectorIdentifier(input, &selectorPart)) {
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[selector appendString:selectorPart];
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}
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RCTSkipWhitespace(input);
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if (RCTReadChar(input, ':')) {
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[selector appendString:@":"];
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RCTSkipWhitespace(input);
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return YES;
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}
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return NO;
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}
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static BOOL RCTParseUnused(const char **input)
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{
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return RCTReadString(input, "__unused") ||
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RCTReadString(input, "__attribute__((unused))");
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}
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static RCTNullability RCTParseNullability(const char **input)
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{
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if (RCTReadString(input, "nullable")) {
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return RCTNullable;
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} else if (RCTReadString(input, "nonnull")) {
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return RCTNonnullable;
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}
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return RCTNullabilityUnspecified;
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}
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static RCTNullability RCTParseNullabilityPostfix(const char **input)
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{
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if (RCTReadString(input, "_Nullable")) {
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return RCTNullable;
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} else if (RCTReadString(input, "_Nonnull")) {
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return RCTNonnullable;
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}
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return RCTNullabilityUnspecified;
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}
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// returns YES if execution is safe to proceed (enqueue callback invocation), NO if callback has already been invoked
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#if RCT_DEBUG
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static BOOL checkCallbackMultipleInvocations(BOOL *didInvoke) {
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if (*didInvoke) {
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RCTFatal(RCTErrorWithMessage(@"Illegal callback invocation from native module. This callback type only permits a single invocation from native code."));
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return NO;
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} else {
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*didInvoke = YES;
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return YES;
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}
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}
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#endif
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extern NSString *RCTParseMethodSignature(const char *input, NSArray<RCTMethodArgument *> **arguments);
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NSString *RCTParseMethodSignature(const char *input, NSArray<RCTMethodArgument *> **arguments)
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{
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RCTSkipWhitespace(&input);
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NSMutableArray *args;
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NSMutableString *selector = [NSMutableString new];
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while (RCTParseSelectorPart(&input, selector)) {
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if (!args) {
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args = [NSMutableArray new];
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}
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// Parse type
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if (RCTReadChar(&input, '(')) {
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RCTSkipWhitespace(&input);
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BOOL unused = RCTParseUnused(&input);
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RCTSkipWhitespace(&input);
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RCTNullability nullability = RCTParseNullability(&input);
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RCTSkipWhitespace(&input);
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NSString *type = RCTParseType(&input);
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RCTSkipWhitespace(&input);
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if (nullability == RCTNullabilityUnspecified) {
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nullability = RCTParseNullabilityPostfix(&input);
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}
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[args addObject:[[RCTMethodArgument alloc] initWithType:type
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nullability:nullability
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unused:unused]];
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RCTSkipWhitespace(&input);
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RCTReadChar(&input, ')');
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RCTSkipWhitespace(&input);
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} else {
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// Type defaults to id if unspecified
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[args addObject:[[RCTMethodArgument alloc] initWithType:@"id"
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nullability:RCTNullable
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unused:NO]];
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}
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// Argument name
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RCTParseArgumentIdentifier(&input, NULL);
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RCTSkipWhitespace(&input);
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}
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*arguments = [args copy];
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return selector;
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}
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RCT_EXTERN_C_END
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- (instancetype)initWithExportedMethod:(const RCTMethodInfo *)exportedMethod
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moduleClass:(Class)moduleClass
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{
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if (self = [super init]) {
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_moduleClass = moduleClass;
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_methodInfo = exportedMethod;
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}
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return self;
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}
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- (void)processMethodSignature
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{
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NSArray<RCTMethodArgument *> *arguments;
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_selector = NSSelectorFromString(RCTParseMethodSignature(_methodInfo->objcName, &arguments));
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RCTAssert(_selector, @"%s is not a valid selector", _methodInfo->objcName);
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// Create method invocation
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NSMethodSignature *methodSignature = [_moduleClass instanceMethodSignatureForSelector:_selector];
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RCTAssert(methodSignature, @"%s is not a recognized Objective-C method.", sel_getName(_selector));
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NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:methodSignature];
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invocation.selector = _selector;
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_invocation = invocation;
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NSMutableArray *retainedObjects = [NSMutableArray array];
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_retainedObjects = retainedObjects;
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// Process arguments
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NSUInteger numberOfArguments = methodSignature.numberOfArguments;
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NSMutableArray<RCTArgumentBlock> *argumentBlocks =
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[[NSMutableArray alloc] initWithCapacity:numberOfArguments - 2];
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#if RCT_DEBUG
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__weak RCTModuleMethod *weakSelf = self;
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#endif
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#define RCT_RETAINED_ARG_BLOCK(_logic) \
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[argumentBlocks addObject:^(__unused RCTBridge *bridge, NSUInteger index, id json) { \
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_logic \
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[invocation setArgument:&value atIndex:(index) + 2]; \
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if (value) { \
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[retainedObjects addObject:value]; \
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} \
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return YES; \
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}]
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#define __PRIMITIVE_CASE(_type, _nullable) { \
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isNullableType = _nullable; \
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_type (*convert)(id, SEL, id) = (__typeof__(convert))objc_msgSend; \
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[argumentBlocks addObject:^(__unused RCTBridge *bridge, NSUInteger index, id json) { \
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_type value = convert([RCTConvert class], selector, json); \
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[invocation setArgument:&value atIndex:(index) + 2]; \
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return YES; \
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}]; \
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break; \
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}
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#define PRIMITIVE_CASE(_type) __PRIMITIVE_CASE(_type, NO)
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#define NULLABLE_PRIMITIVE_CASE(_type) __PRIMITIVE_CASE(_type, YES)
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// Explicitly copy the block
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#define __COPY_BLOCK(block...) \
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id value = [block copy]; \
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if (value) { \
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[retainedObjects addObject:value]; \
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} \
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#if RCT_DEBUG
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#define BLOCK_CASE(_block_args, _block) RCT_RETAINED_ARG_BLOCK( \
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if (json && ![json isKindOfClass:[NSNumber class]]) { \
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RCTLogArgumentError(weakSelf, index, json, "should be a function"); \
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return NO; \
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} \
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__block BOOL didInvoke = NO; \
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__COPY_BLOCK(^_block_args { \
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if (checkCallbackMultipleInvocations(&didInvoke)) _block \
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}); \
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)
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#else
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#define BLOCK_CASE(_block_args, _block) \
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RCT_RETAINED_ARG_BLOCK( __COPY_BLOCK(^_block_args { _block }); )
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#endif
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for (NSUInteger i = 2; i < numberOfArguments; i++) {
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const char *objcType = [methodSignature getArgumentTypeAtIndex:i];
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BOOL isNullableType = NO;
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RCTMethodArgument *argument = arguments[i - 2];
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NSString *typeName = argument.type;
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SEL selector = selectorForType(typeName);
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if ([RCTConvert respondsToSelector:selector]) {
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switch (objcType[0]) {
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// Primitives
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case _C_CHR: PRIMITIVE_CASE(char)
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case _C_UCHR: PRIMITIVE_CASE(unsigned char)
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case _C_SHT: PRIMITIVE_CASE(short)
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case _C_USHT: PRIMITIVE_CASE(unsigned short)
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case _C_INT: PRIMITIVE_CASE(int)
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case _C_UINT: PRIMITIVE_CASE(unsigned int)
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case _C_LNG: PRIMITIVE_CASE(long)
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case _C_ULNG: PRIMITIVE_CASE(unsigned long)
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case _C_LNG_LNG: PRIMITIVE_CASE(long long)
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case _C_ULNG_LNG: PRIMITIVE_CASE(unsigned long long)
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case _C_FLT: PRIMITIVE_CASE(float)
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case _C_DBL: PRIMITIVE_CASE(double)
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case _C_BOOL: PRIMITIVE_CASE(BOOL)
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case _C_SEL: NULLABLE_PRIMITIVE_CASE(SEL)
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case _C_CHARPTR: NULLABLE_PRIMITIVE_CASE(const char *)
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case _C_PTR: NULLABLE_PRIMITIVE_CASE(void *)
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case _C_ID: {
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isNullableType = YES;
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id (*convert)(id, SEL, id) = (__typeof__(convert))objc_msgSend;
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RCT_RETAINED_ARG_BLOCK(
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id value = convert([RCTConvert class], selector, json);
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);
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break;
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}
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case _C_STRUCT_B: {
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NSMethodSignature *typeSignature = [RCTConvert methodSignatureForSelector:selector];
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NSInvocation *typeInvocation = [NSInvocation invocationWithMethodSignature:typeSignature];
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typeInvocation.selector = selector;
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typeInvocation.target = [RCTConvert class];
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[argumentBlocks addObject:^(__unused RCTBridge *bridge, NSUInteger index, id json) {
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void *returnValue = malloc(typeSignature.methodReturnLength);
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[typeInvocation setArgument:&json atIndex:2];
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[typeInvocation invoke];
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[typeInvocation getReturnValue:returnValue];
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[invocation setArgument:returnValue atIndex:index + 2];
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free(returnValue);
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return YES;
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}];
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break;
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}
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default: {
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static const char *blockType = @encode(__typeof__(^{}));
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if (!strcmp(objcType, blockType)) {
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BLOCK_CASE((NSArray *args), {
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[bridge enqueueCallback:json args:args];
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});
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} else {
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RCTLogError(@"Unsupported argument type '%@' in method %@.",
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typeName, [self methodName]);
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}
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}
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}
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} else if ([typeName isEqualToString:@"RCTResponseSenderBlock"]) {
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BLOCK_CASE((NSArray *args), {
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[bridge enqueueCallback:json args:args];
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});
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} else if ([typeName isEqualToString:@"RCTResponseErrorBlock"]) {
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BLOCK_CASE((NSError *error), {
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[bridge enqueueCallback:json args:@[RCTJSErrorFromNSError(error)]];
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});
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} else if ([typeName isEqualToString:@"RCTPromiseResolveBlock"]) {
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RCTAssert(i == numberOfArguments - 2,
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@"The RCTPromiseResolveBlock must be the second to last parameter in %@",
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[self methodName]);
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BLOCK_CASE((id result), {
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[bridge enqueueCallback:json args:result ? @[result] : @[]];
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});
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} else if ([typeName isEqualToString:@"RCTPromiseRejectBlock"]) {
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RCTAssert(i == numberOfArguments - 1,
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@"The RCTPromiseRejectBlock must be the last parameter in %@",
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[self methodName]);
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BLOCK_CASE((NSString *code, NSString *message, NSError *error), {
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NSDictionary *errorJSON = RCTJSErrorFromCodeMessageAndNSError(code, message, error);
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[bridge enqueueCallback:json args:@[errorJSON]];
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});
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} else if ([typeName hasPrefix:@"JS::"]) {
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NSString *selectorNameForCxxType =
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[[typeName stringByReplacingOccurrencesOfString:@"::" withString:@"_"]
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stringByAppendingString:@":"];
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selector = NSSelectorFromString(selectorNameForCxxType);
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[argumentBlocks addObject:^(__unused RCTBridge *bridge, NSUInteger index, id json) {
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RCTManagedPointer *(*convert)(id, SEL, id) = (__typeof__(convert))objc_msgSend;
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RCTManagedPointer *box = convert([RCTCxxConvert class], selector, json);
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void *pointer = box.voidPointer;
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[invocation setArgument:&pointer atIndex:index + 2];
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[retainedObjects addObject:box];
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return YES;
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}];
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} else {
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// Unknown argument type
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RCTLogError(@"Unknown argument type '%@' in method %@. Extend RCTConvert to support this type.",
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typeName, [self methodName]);
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}
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#if RCT_DEBUG
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RCTNullability nullability = argument.nullability;
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if (!isNullableType) {
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if (nullability == RCTNullable) {
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RCTLogArgumentError(weakSelf, i - 2, typeName, "is marked as "
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"nullable, but is not a nullable type.");
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}
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nullability = RCTNonnullable;
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}
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/**
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* Special case - Numbers are not nullable in Android, so we
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* don't support this for now. In future we may allow it.
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*/
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if ([typeName isEqualToString:@"NSNumber"]) {
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BOOL unspecified = (nullability == RCTNullabilityUnspecified);
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if (!argument.unused && (nullability == RCTNullable || unspecified)) {
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RCTLogArgumentError(weakSelf, i - 2, typeName,
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[unspecified ? @"has unspecified nullability" : @"is marked as nullable"
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stringByAppendingString: @" but React requires that all NSNumber "
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"arguments are explicitly marked as `nonnull` to ensure "
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"compatibility with Android."].UTF8String);
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}
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nullability = RCTNonnullable;
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}
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if (nullability == RCTNonnullable) {
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RCTArgumentBlock oldBlock = argumentBlocks[i - 2];
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argumentBlocks[i - 2] = ^(RCTBridge *bridge, NSUInteger index, id json) {
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if (json != nil) {
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if (!oldBlock(bridge, index, json)) {
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return NO;
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}
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if (isNullableType) {
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// Check converted value wasn't null either, as method probably
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// won't gracefully handle a nil vallue for a nonull argument
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void *value;
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[invocation getArgument:&value atIndex:index + 2];
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if (value == NULL) {
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return NO;
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}
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}
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return YES;
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}
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RCTLogArgumentError(weakSelf, index, typeName, "must not be null");
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return NO;
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};
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}
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#endif
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}
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#if RCT_DEBUG
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const char *objcType = _invocation.methodSignature.methodReturnType;
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if (_methodInfo->isSync && objcType[0] != _C_ID) {
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RCTLogError(@"Return type of %@.%s should be (id) as the method is \"sync\"",
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RCTBridgeModuleNameForClass(_moduleClass), self.JSMethodName);
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}
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#endif
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_argumentBlocks = argumentBlocks;
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}
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- (SEL)selector
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{
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if (_selector == NULL) {
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RCT_PROFILE_BEGIN_EVENT(RCTProfileTagAlways, @"", (@{ @"module": NSStringFromClass(_moduleClass),
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@"method": @(_methodInfo->objcName) }));
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[self processMethodSignature];
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RCT_PROFILE_END_EVENT(RCTProfileTagAlways, @"");
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}
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return _selector;
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}
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- (const char *)JSMethodName
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{
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NSString *methodName = _JSMethodName;
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if (!methodName) {
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const char *jsName = _methodInfo->jsName;
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if (jsName && strlen(jsName) > 0) {
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methodName = @(jsName);
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} else {
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methodName = @(_methodInfo->objcName);
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NSRange colonRange = [methodName rangeOfString:@":"];
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if (colonRange.location != NSNotFound) {
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methodName = [methodName substringToIndex:colonRange.location];
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}
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methodName = [methodName stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
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RCTAssert(methodName.length, @"%s is not a valid JS function name, please"
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" supply an alternative using RCT_REMAP_METHOD()", _methodInfo->objcName);
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}
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_JSMethodName = methodName;
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}
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return methodName.UTF8String;
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}
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- (RCTFunctionType)functionType
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{
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if (strstr(_methodInfo->objcName, "RCTPromise") != NULL) {
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RCTAssert(!_methodInfo->isSync, @"Promises cannot be used in sync functions");
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return RCTFunctionTypePromise;
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} else if (_methodInfo->isSync) {
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return RCTFunctionTypeSync;
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} else {
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return RCTFunctionTypeNormal;
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}
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}
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- (id)invokeWithBridge:(RCTBridge *)bridge
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module:(id)module
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arguments:(NSArray *)arguments
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{
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if (_argumentBlocks == nil) {
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[self processMethodSignature];
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}
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#if RCT_DEBUG
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// Sanity check
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RCTAssert([module class] == _moduleClass, @"Attempted to invoke method \
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%@ on a module of class %@", [self methodName], [module class]);
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|
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// Safety check
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if (arguments.count != _argumentBlocks.count) {
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NSInteger actualCount = arguments.count;
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NSInteger expectedCount = _argumentBlocks.count;
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// Subtract the implicit Promise resolver and rejecter functions for implementations of async functions
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if (self.functionType == RCTFunctionTypePromise) {
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actualCount -= 2;
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expectedCount -= 2;
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}
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RCTLogError(@"%@.%s was called with %lld arguments but expects %lld arguments. "
|
|
@"If you haven\'t changed this method yourself, this usually means that "
|
|
@"your versions of the native code and JavaScript code are out of sync. "
|
|
@"Updating both should make this error go away.",
|
|
RCTBridgeModuleNameForClass(_moduleClass), self.JSMethodName,
|
|
(long long)actualCount, (long long)expectedCount);
|
|
return nil;
|
|
}
|
|
#endif
|
|
|
|
// Set arguments
|
|
NSUInteger index = 0;
|
|
for (id json in arguments) {
|
|
RCTArgumentBlock block = _argumentBlocks[index];
|
|
if (!block(bridge, index, RCTNilIfNull(json))) {
|
|
// Invalid argument, abort
|
|
RCTLogArgumentError(self, index, json, "could not be processed. Aborting method call.");
|
|
return nil;
|
|
}
|
|
index++;
|
|
}
|
|
|
|
// Invoke method
|
|
#ifdef RCT_MAIN_THREAD_WATCH_DOG_THRESHOLD
|
|
if (RCTIsMainQueue()) {
|
|
CFTimeInterval start = CACurrentMediaTime();
|
|
[_invocation invokeWithTarget:module];
|
|
CFTimeInterval duration = CACurrentMediaTime() - start;
|
|
if (duration > RCT_MAIN_THREAD_WATCH_DOG_THRESHOLD) {
|
|
RCTLogWarn(
|
|
@"Main Thread Watchdog: Invocation of %@ blocked the main thread for %dms. "
|
|
"Consider using background-threaded modules and asynchronous calls "
|
|
"to spend less time on the main thread and keep the app's UI responsive.",
|
|
[self methodName],
|
|
(int)(duration * 1000)
|
|
);
|
|
}
|
|
} else {
|
|
[_invocation invokeWithTarget:module];
|
|
}
|
|
#else
|
|
[_invocation invokeWithTarget:module];
|
|
#endif
|
|
|
|
index = 2;
|
|
[_retainedObjects removeAllObjects];
|
|
|
|
if (_methodInfo->isSync) {
|
|
void *returnValue;
|
|
[_invocation getReturnValue:&returnValue];
|
|
return (__bridge id)returnValue;
|
|
}
|
|
return nil;
|
|
}
|
|
|
|
- (NSString *)methodName
|
|
{
|
|
if (!_selector) {
|
|
[self processMethodSignature];
|
|
}
|
|
return [NSString stringWithFormat:@"-[%@ %s]", _moduleClass, sel_getName(_selector)];
|
|
}
|
|
|
|
- (NSString *)description
|
|
{
|
|
return [NSString stringWithFormat:@"<%@: %p; exports %@ as %s(); type: %s>",
|
|
[self class], self, [self methodName], self.JSMethodName, RCTFunctionDescriptorFromType(self.functionType)];
|
|
}
|
|
|
|
@end
|