chrome/common/mac/objc_method_swizzle.h

   1 // Copyright (c) 2011 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_COMMON_MAC_OBJC_METHOD_SWIZZLE_H_
   6 #define CHROME_COMMON_MAC_OBJC_METHOD_SWIZZLE_H_
   7
   8 #import <objc/runtime.h>
   9
  10 // You should think twice every single time you use anything from this
  11 // namespace.
  12 namespace ObjcEvilDoers {
  13
  14 // This is similar to class_getInstanceMethod(), except that it
  15 // returns NULL if |aClass| does not directly implement |aSelector|.
  16 Method GetImplementedInstanceMethod(Class aClass, SEL aSelector);
  17
  18 // Exchanges the implementation of |originalSelector| and
  19 // |alternateSelector| within |aClass|.  Both selectors must be
  20 // implemented directly by |aClass|, not inherited.  The IMP returned
  21 // is for |originalSelector| (for purposes of forwarding).
  22 IMP SwizzleImplementedInstanceMethods(
  23     Class aClass, const SEL originalSelector, const SEL alternateSelector);
  24
  25 }  // namespace ObjcEvilDoers
  26
  27 #endif  // CHROME_COMMON_MAC_OBJC_METHOD_SWIZZLE_H_