blob: e18e4abfda553fcbab6787a0315c128a3c92e3f1 [file] [log] [blame]
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#import <objc/runtime.h>
#include "base/base_export.h"
#include "base/macros.h"
namespace base {
namespace mac {
// Within a given scope, swaps method implementations of a class interface, or
// between two class interfaces. The argument and return types must match.
class BASE_EXPORT ScopedObjCClassSwizzler {
// Given two classes that each respond to |selector|, swap the implementations
// of those methods.
ScopedObjCClassSwizzler(Class target, Class source, SEL selector);
// Given two selectors on the same class interface, |target| (e.g. via
// inheritance or categories), swap the implementations of methods |original|
// and |alternate|.
ScopedObjCClassSwizzler(Class target, SEL original, SEL alternate);
// Return a callable function pointer for the replaced method. To call this
// from the replacing function, the first two arguments should be |self| and
// |_cmd|. These are followed by the (variadic) method arguments.
IMP GetOriginalImplementation();
// Delegated constructor.
void Init(Class target, Class source, SEL original, SEL alternate);
Method old_selector_impl_;
Method new_selector_impl_;
} // namespace mac
} // namespace base