| commit | author | age | ||
| 454098 | 1 | /* |
| L | 2 | * Copyright 2018 Google LLC |
| 3 | * | |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 5 | * you may not use this file except in compliance with the License. | |
| 6 | * You may obtain a copy of the License at | |
| 7 | * | |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
| 9 | * | |
| 10 | * Unless required by applicable law or agreed to in writing, software | |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 13 | * See the License for the specific language governing permissions and | |
| 14 | * limitations under the License. | |
| 15 | */ | |
| 16 | ||
| 17 | #import <Foundation/Foundation.h> | |
| 18 | ||
| 19 | NS_ASSUME_NONNULL_BEGIN | |
| 20 | ||
| 21 | /** This class handles the runtime manipulation necessary to instrument selectors. It stores the | |
| 22 | * classes and selectors that have been swizzled, and runs all operations on its own queue. | |
| 23 | */ | |
| 24 | @interface GULSwizzler : NSObject | |
| 25 | ||
| 26 | /** Manipulates the Objective-C runtime to replace the original IMP with the supplied block. | |
| 27 | * | |
| 28 | * @param aClass The class to swizzle. | |
| 29 | * @param selector The selector of the class to swizzle. | |
| 30 | * @param isClassSelector A BOOL specifying whether the selector is a class or instance selector. | |
| 31 | * @param block The block that replaces the original IMP. | |
| 32 | */ | |
| 33 | + (void)swizzleClass:(Class)aClass | |
| 34 | selector:(SEL)selector | |
| 35 | isClassSelector:(BOOL)isClassSelector | |
| 36 | withBlock:(nullable id)block; | |
| 37 | ||
| 38 | /** Returns the current IMP for the given class and selector. | |
| 39 | * | |
| 40 | * @param aClass The class to use. | |
| 41 | * @param selector The selector to find the implementation of. | |
| 42 | * @param isClassSelector A BOOL specifying whether the selector is a class or instance selector. | |
| 43 | * @return The implementation of the selector in the runtime. | |
| 44 | */ | |
| 45 | + (nullable IMP)currentImplementationForClass:(Class)aClass | |
| 46 | selector:(SEL)selector | |
| 47 | isClassSelector:(BOOL)isClassSelector; | |
| 48 | ||
| 49 | /** Checks the runtime to see if a selector exists on a class. If a property is declared as | |
| 50 | * @dynamic, we have a reverse swizzling situation, where the implementation of a method exists | |
| 51 | * only in concrete subclasses, and NOT in the superclass. We can detect that situation using | |
| 52 | * this helper method. Similarly, we can detect situations where a class doesn't implement a | |
| 53 | * protocol method. | |
| 54 | * | |
| 55 | * @param selector The selector to check for. | |
| 56 | * @param aClass The class to check. | |
| 57 | * @param isClassSelector A BOOL specifying whether the selector is a class or instance selector. | |
| 58 | * @return YES if the method was found in this selector/class combination, NO otherwise. | |
| 59 | */ | |
| 60 | + (BOOL)selector:(SEL)selector existsInClass:(Class)aClass isClassSelector:(BOOL)isClassSelector; | |
| 61 | ||
| 62 | /** Returns a list of all Objective-C (and not primitive) ivars contained by the given object. | |
| 63 | * | |
| 64 | * @param object The object whose ivars will be iterated. | |
| 65 | * @return The list of ivar objects. | |
| 66 | */ | |
| 67 | + (NSArray<id> *)ivarObjectsForObject:(id)object; | |
| 68 | ||
| 69 | @end | |
| 70 | ||
| 71 | NS_ASSUME_NONNULL_END | |
