1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
/****************************************************************************
**
** Copyright (c) 2007-2008, Apple, Inc.
**
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are met:
**
** * Redistributions of source code must retain the above copyright notice,
** this list of conditions and the following disclaimer.
**
** * Redistributions in binary form must reproduce the above copyright notice,
** this list of conditions and the following disclaimer in the documentation
** and/or other materials provided with the distribution.
**
** * Neither the name of Apple, Inc. nor the names of its contributors
** may be used to endorse or promote products derived from this software
** without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
** EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
** PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
** LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
** NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
** SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**
****************************************************************************/
#include "qcocoaintrospection.h"
QT_BEGIN_NAMESPACE
void qt_cocoa_change_implementation(Class baseClass, SEL originalSel, Class proxyClass, SEL replacementSel, SEL backupSel)
{
// The following code replaces the _implementation_ for the selector we want to hack
// (originalSel) with the implementation found in proxyClass. Then it creates
// a new 'backup' method inside baseClass containing the old, original,
// implementation (fakeSel). You can let the proxy implementation of originalSel
// call fakeSel if needed (similar approach to calling a super class implementation).
// fakeSel must also be implemented in proxyClass, as the signature is used
// as template for the method one we add into baseClass.
// NB: You will typically never create any instances of proxyClass; we use it
// only for stealing its contents and put it into baseClass.
if (!replacementSel)
replacementSel = originalSel;
Method originalMethod = class_getInstanceMethod(baseClass, originalSel);
Method replacementMethod = class_getInstanceMethod(proxyClass, replacementSel);
IMP originalImp = method_setImplementation(originalMethod, method_getImplementation(replacementMethod));
if (backupSel) {
Method backupMethod = class_getInstanceMethod(proxyClass, backupSel);
class_addMethod(baseClass, backupSel, originalImp, method_getTypeEncoding(backupMethod));
}
}
void qt_cocoa_change_back_implementation(Class baseClass, SEL originalSel, SEL backupSel)
{
Method originalMethod = class_getInstanceMethod(baseClass, originalSel);
Method backupMethodInBaseClass = class_getInstanceMethod(baseClass, backupSel);
method_setImplementation(originalMethod, method_getImplementation(backupMethodInBaseClass));
}
QT_END_NAMESPACE
|
