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// Copyright 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#import <Foundation/Foundation.h>
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NS_ASSUME_NONNULL_BEGIN
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/** This class is used to manage the swizzling of selectors on classes. An instance of this class
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* should be created for every selector that is being swizzled.
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*/
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@interface FPRSelectorInstrumentor : NSObject
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/** The swizzled selector. */
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@property(nonatomic, readonly) SEL selector;
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/** Please use designated initializer. */
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- (instancetype)init NS_UNAVAILABLE;
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/** Initializes an instance of this class. The designated initializer.
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*
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* @note Capture the current IMP outside the replacing block which will be the originalIMP once we
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* swizzle.
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*
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* @param selector The selector pointer.
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* @param aClass The class to operate on.
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* @param isClassSelector YES specifies that the selector is a class selector.
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* @return An instance of this class.
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*/
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- (instancetype)initWithSelector:(SEL)selector
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class:(Class)aClass
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isClassSelector:(BOOL)isClassSelector NS_DESIGNATED_INITIALIZER;
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/** Sets the instrumentor's replacing block. To be used in conjunction with initWithSelector:.
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*
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* @param block The block to replace the original implementation with. Make sure to call
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* originalImp in your replacing block.
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*/
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- (void)setReplacingBlock:(id)block;
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/** The current IMP of the swizzled selector.
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*
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* @return The current IMP for the class, SEL of the FPRSelectorInstrumentor.
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*/
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- (IMP)currentIMP;
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/** Swizzles the selector. */
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- (void)swizzle;
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/** Causes the original implementation to be run. */
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- (void)unswizzle;
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@end
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NS_ASSUME_NONNULL_END
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