summaryrefslogtreecommitdiffstats
path: root/src/dbus/qdbuspendingreply.h
blob: 0cdec7346d7bd6dee1c6e077c51068430b0f71b2 (plain)
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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtDBus module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QDBUSPENDINGREPLY_H
#define QDBUSPENDINGREPLY_H

#include <QtCore/qglobal.h>
#include <QtDBus/qdbusmacros.h>
#include <QtDBus/qdbusargument.h>
#include <QtDBus/qdbuspendingcall.h>

#ifndef QT_NO_DBUS

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE


class Q_DBUS_EXPORT QDBusPendingReplyData: public QDBusPendingCall
{
protected:
    QDBusPendingReplyData();
    ~QDBusPendingReplyData();
    void assign(const QDBusPendingCall &call);
    void assign(const QDBusMessage &message);

    QVariant argumentAt(int index) const;
    void setMetaTypes(int count, const int *metaTypes);
};

namespace QDBusPendingReplyTypes {
    template<int Index,
             typename T1, typename T2, typename T3, typename T4,
             typename T5, typename T6, typename T7, typename T8>
    struct Select
    {
        typedef Select<Index - 1, T2, T3, T4, T5, T6, T7, T8, void> Next;
        typedef typename Next::Type Type;
    };
    template<typename T1, typename T2, typename T3, typename T4,
             typename T5, typename T6, typename T7, typename T8>
    struct Select<0, T1, T2, T3, T4, T5, T6, T7, T8>
    {
        typedef T1 Type;
    };

    template<typename T1> inline int metaTypeFor(T1 * = 0)
    { return qMetaTypeId<T1>(); }
    // specialize for QVariant, allowing it to be used in place of QDBusVariant
    template<> inline int metaTypeFor<QVariant>(QVariant *)
    { return qMetaTypeId<QDBusVariant>(); }

    template<typename T1, typename T2, typename T3, typename T4,
             typename T5, typename T6, typename T7, typename T8>
    struct ForEach
    {
        typedef ForEach<T2, T3, T4, T5, T6, T7, T8, void> Next;
        enum { Total = Next::Total + 1 };
        static inline void fillMetaTypes(int *p)
        {
            *p = metaTypeFor<T1>(0);
            Next::fillMetaTypes(++p);
        }
    };
    template<>
    struct ForEach<void, void, void, void,   void, void, void, void>
    {
        enum { Total = 0 };
        static inline void fillMetaTypes(int *)
        { }
    };
} // namespace QDBusPendingReplyTypes

template<typename T1 = void, typename T2 = void, typename T3 = void, typename T4 = void,
         typename T5 = void, typename T6 = void, typename T7 = void, typename T8 = void>
class QDBusPendingReply:
#ifdef Q_QDOC
    public QDBusPendingCall
#else
    public QDBusPendingReplyData
#endif
{
    typedef QDBusPendingReplyTypes::ForEach<T1, T2, T3, T4, T5, T6, T7, T8> ForEach;
    template<int Index> struct Select :
    QDBusPendingReplyTypes::Select<Index, T1, T2, T3, T4, T5, T6, T7, T8>
    {
    };

public:
    enum { Count = ForEach::Total };

    inline QDBusPendingReply()
    { }
    inline QDBusPendingReply(const QDBusPendingReply &other)
        : QDBusPendingReplyData(other)
    { }
    inline /*implicit*/ QDBusPendingReply(const QDBusPendingCall &call) // required by qdbusxml2cpp-generated code
    { *this = call; }
    inline /*implicit*/ QDBusPendingReply(const QDBusMessage &message)
    { *this = message; }
    inline QDBusPendingReply &operator=(const QDBusPendingReply &other)
    { assign(other); return *this; }
    inline QDBusPendingReply &operator=(const QDBusPendingCall &call)
    { assign(call); return *this; }
    inline QDBusPendingReply &operator=(const QDBusMessage &message)
    { assign(message); return *this; }

    inline int count() const { return Count; }

#if defined(Q_QDOC) || defined(Q_NO_USING_KEYWORD)
    inline QVariant argumentAt(int index) const
    { return QDBusPendingReplyData::argumentAt(index); }
#else
    using QDBusPendingReplyData::argumentAt;
#endif

#if defined(Q_QDOC)
    bool isFinished() const;
    void waitForFinished();

    bool isValid() const;
    bool isError() const;
    QDBusError error() const;
    QDBusMessage reply() const;

    template<int Index> inline Type argumentAt() const;
    inline T1 value() const;
    inline operator T1() const;
#else
    template<int Index> inline
    const typename Select<Index>::Type argumentAt() const
    {
        // static assert?
        Q_ASSERT_X(Index < count() && Index >= 0, "QDBusPendingReply::argumentAt",
                   "Index out of bounds");
        typedef typename Select<Index>::Type ResultType;
        return qdbus_cast<ResultType>(argumentAt(Index), 0);
    }

    inline typename Select<0>::Type value() const
    {
        return argumentAt<0>();
    }

    inline operator typename Select<0>::Type() const
    {
        return argumentAt<0>();
    }
#endif

private:
    inline void calculateMetaTypes()
    {
        if (!d) return;
        int typeIds[Count > 0 ? Count : 1]; // use at least one since zero-sized arrays aren't valid
        ForEach::fillMetaTypes(typeIds);
        setMetaTypes(Count, typeIds);
    }

    inline void assign(const QDBusPendingCall &call)
    {
        QDBusPendingReplyData::assign(call);
        calculateMetaTypes();
    }

    inline void assign(const QDBusMessage &message)
    {
        QDBusPendingReplyData::assign(message);
        calculateMetaTypes();
    }
};

QT_END_NAMESPACE

QT_END_HEADER

#endif // QT_NO_DBUS
#endif