added iOS source code

[wl-app.git] / iOS / Pods / GoogleUtilities / GoogleUtilities / MethodSwizzler / Private / GULSwizzler.h

diff --git a/iOS/Pods/GoogleUtilities/GoogleUtilities/MethodSwizzler/Private/GULSwizzler.h b/iOS/Pods/GoogleUtilities/GoogleUtilities/MethodSwizzler/Private/GULSwizzler.h
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+++ b/iOS/Pods/GoogleUtilities/GoogleUtilities/MethodSwizzler/Private/GULSwizzler.h
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+/*
+ * Copyright 2018 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/** This class handles the runtime manipulation necessary to instrument selectors. It stores the
+ *  classes and selectors that have been swizzled, and runs all operations on its own queue.
+ */
+@interface GULSwizzler : NSObject
+
+/** Manipulates the Objective-C runtime to replace the original IMP with the supplied block.
+ *
+ *  @param aClass The class to swizzle.
+ *  @param selector The selector of the class to swizzle.
+ *  @param isClassSelector A BOOL specifying whether the selector is a class or instance selector.
+ *  @param block The block that replaces the original IMP.
+ */
++ (void)swizzleClass:(Class)aClass
+            selector:(SEL)selector
+     isClassSelector:(BOOL)isClassSelector
+           withBlock:(nullable id)block;
+
+/** Restores the original implementation.
+ *
+ *  @param aClass The class to unswizzle.
+ *  @param selector The selector to restore the original implementation of.
+ *  @param isClassSelector A BOOL specifying whether the selector is a class or instance selector.
+ */
++ (void)unswizzleClass:(Class)aClass selector:(SEL)selector isClassSelector:(BOOL)isClassSelector;
+
+/** Returns the current IMP for the given class and selector.
+ *
+ *  @param aClass The class to use.
+ *  @param selector The selector to find the implementation of.
+ *  @param isClassSelector A BOOL specifying whether the selector is a class or instance selector.
+ *  @return The implementation of the selector in the runtime.
+ */
++ (nullable IMP)currentImplementationForClass:(Class)aClass
+                                     selector:(SEL)selector
+                              isClassSelector:(BOOL)isClassSelector;
+
+/** Returns the original IMP for the given class and selector.
+ *
+ *  @param aClass The class to use.
+ *  @param selector The selector to find the implementation of.
+ *  @param isClassSelector A BOOL specifying whether the selector is a class or instance selector.
+ *  @return The implementation of the selector in the runtime before any consumer or GULSwizzler
+ *          swizzled.
+ */
++ (nullable IMP)originalImplementationForClass:(Class)aClass
+                                      selector:(SEL)selector
+                               isClassSelector:(BOOL)isClassSelector;
+
+/** Checks the runtime to see if a selector exists on a class. If a property is declared as
+ *  @dynamic, we have a reverse swizzling situation, where the implementation of a method exists
+ *  only in concrete subclasses, and NOT in the superclass. We can detect that situation using
+ *  this helper method. Similarly, we can detect situations where a class doesn't implement a
+ *  protocol method.
+ *
+ *  @param selector The selector to check for.
+ *  @param aClass The class to check.
+ *  @param isClassSelector A BOOL specifying whether the selector is a class or instance selector.
+ *  @return YES if the method was found in this selector/class combination, NO otherwise.
+ */
++ (BOOL)selector:(SEL)selector existsInClass:(Class)aClass isClassSelector:(BOOL)isClassSelector;
+
+/** Returns a list of all Objective-C (and not primitive) ivars contained by the given object.
+ *
+ *  @param object The object whose ivars will be iterated.
+ *  @return The list of ivar objects.
+ */
++ (NSArray<id> *)ivarObjectsForObject:(id)object;
+
+@end
+
+NS_ASSUME_NONNULL_END