1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CHROME_BROWSER_UI_COCOA_OBJC_METHOD_SWIZZLE_H_ 6 #define CHROME_BROWSER_UI_COCOA_OBJC_METHOD_SWIZZLE_H_ 7 #pragma once 8 9 #import <objc/objc-class.h> 10 11 // You should think twice every single time you use anything from this 12 // namespace. 13 namespace ObjcEvilDoers { 14 15 // This is similar to class_getInstanceMethod(), except that it 16 // returns NULL if |aClass| does not directly implement |aSelector|. 17 Method GetImplementedInstanceMethod(Class aClass, SEL aSelector); 18 19 // Exchanges the implementation of |originalSelector| and 20 // |alternateSelector| within |aClass|. Both selectors must be 21 // implemented directly by |aClass|, not inherited. The IMP returned 22 // is for |originalSelector| (for purposes of forwarding). 23 IMP SwizzleImplementedInstanceMethods( 24 Class aClass, const SEL originalSelector, const SEL alternateSelector); 25 26 } // namespace ObjcEvilDoers 27 28 #endif // CHROME_BROWSER_UI_COCOA_OBJC_METHOD_SWIZZLE_H_ 29