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
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you 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 .
*/
#ifndef INCLUDED_COMPHELPER_SERVICEHELPER_HXX
#define INCLUDED_COMPHELPER_SERVICEHELPER_HXX
#include <rtl/uuid.h>
#include <com/sun/star/lang/XUnoTunnel.hpp>
#include <com/sun/star/uno/Sequence.hxx>
namespace comphelper {
// Class incapsulating UIDs used as e.g. tunnel IDs for css::lang::XUnoTunnel,
// or implementation IDs for css::lang::XTypeProvider
class UnoIdInit
{
private:
css::uno::Sequence< sal_Int8 > m_aSeq;
public:
UnoIdInit() : m_aSeq(16)
{
rtl_createUuid(reinterpret_cast<sal_uInt8*>(m_aSeq.getArray()), nullptr, true);
}
const css::uno::Sequence< sal_Int8 >& getSeq() const { return m_aSeq; }
};
inline sal_Int64 getSomething_cast(void* p)
{
return sal::static_int_cast<sal_Int64>(reinterpret_cast<sal_IntPtr>(p));
}
template<class T> inline T* getSomething_cast(sal_Int64 n)
{
return reinterpret_cast<T*>(sal::static_int_cast<sal_IntPtr>(n));
}
template <class T> T* getFromUnoTunnel(const css::uno::Reference<css::lang::XUnoTunnel>& xUT)
{
if (!xUT.is())
return nullptr;
return getSomething_cast<T>(xUT->getSomething(T::getUnoTunnelId()));
}
// Takes an interface
template <class T> T* getFromUnoTunnel(const css::uno::Reference<css::uno::XInterface>& xIface)
{
return getFromUnoTunnel<T>(
css::uno::Reference<css::lang::XUnoTunnel>{ xIface, css::uno::UNO_QUERY });
}
template <typename T>
inline bool isUnoTunnelId(const css::uno::Sequence< sal_Int8 >& rId)
{
return rId.getLength() == 16
&& memcmp(T::getUnoTunnelId().getConstArray(), rId.getConstArray(), 16) == 0;
}
template <class Base> struct FallbackToGetSomethingOf
{
static sal_Int64 get(const css::uno::Sequence<sal_Int8>& rId, Base* p)
{
return p->Base::getSomething(rId);
}
};
template <> struct FallbackToGetSomethingOf<void>
{
static sal_Int64 get(const css::uno::Sequence<sal_Int8>&, void*) { return 0; }
};
template <class T, class Base = void>
sal_Int64 getSomethingImpl(const css::uno::Sequence<sal_Int8>& rId, T* pThis,
FallbackToGetSomethingOf<Base> = {})
{
if (isUnoTunnelId<T>(rId))
return getSomething_cast(pThis);
return FallbackToGetSomethingOf<Base>::get(rId, pThis);
}
}
/** the UNO3_GETIMPLEMENTATION_* macros implement a static helper function
that gives access to your implementation for a given interface reference,
if possible.
Example:
MyClass* pClass = comphelper::getFromUnoTunnel<MyClass>( xRef );
Usage:
Put a UNO3_GETIMPLEMENTATION_DECL( classname ) inside your class
definition and UNO3_GETIMPLEMENTATION_IMPL( classname ) inside
your cxx file. Your class must inherit css::lang::XUnoTunnel
and export it with queryInterface. Implementation of XUnoTunnel is
done by this macro.
*/
#define UNO3_GETIMPLEMENTATION_DECL( classname ) \
static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId() noexcept; \
virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
#define UNO3_GETIMPLEMENTATION_BASE_IMPL( classname ) \
const css::uno::Sequence< sal_Int8 > & classname::getUnoTunnelId() noexcept \
{ \
static const comphelper::UnoIdInit aId; \
return aId.getSeq(); \
}
#define UNO3_GETIMPLEMENTATION_IMPL( classname )\
UNO3_GETIMPLEMENTATION_BASE_IMPL(classname)\
sal_Int64 SAL_CALL classname::getSomething( const css::uno::Sequence< sal_Int8 >& rId ) \
{ \
return comphelper::getSomethingImpl(rId, this); \
}
#define UNO3_GETIMPLEMENTATION2_IMPL( classname, baseclass )\
UNO3_GETIMPLEMENTATION_BASE_IMPL(classname)\
sal_Int64 SAL_CALL classname::getSomething( const css::uno::Sequence< sal_Int8 >& rId ) \
{ \
return comphelper::getSomethingImpl(rId, this, comphelper::FallbackToGetSomethingOf<baseclass>{}); \
}
#endif // INCLUDED_COMPHELPER_SERVICEHELPER_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
