1 | /**************************************************************************** |
2 | ** |
3 | ** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies). |
4 | ** Contact: http://www.qt-project.org/legal |
5 | ** |
6 | ** This file is part of the QtDBus module of the Qt Toolkit. |
7 | ** |
8 | ** $QT_BEGIN_LICENSE:LGPL$ |
9 | ** Commercial License Usage |
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15 | ** use the contact form at http://qt.digia.com/contact-us. |
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17 | ** GNU Lesser General Public License Usage |
18 | ** Alternatively, this file may be used under the terms of the GNU Lesser |
19 | ** General Public License version 2.1 as published by the Free Software |
20 | ** Foundation and appearing in the file LICENSE.LGPL included in the |
21 | ** packaging of this file. Please review the following information to |
22 | ** ensure the GNU Lesser General Public License version 2.1 requirements |
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24 | ** |
25 | ** In addition, as a special exception, Digia gives you certain additional |
26 | ** rights. These rights are described in the Digia Qt LGPL Exception |
27 | ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
28 | ** |
29 | ** GNU General Public License Usage |
30 | ** Alternatively, this file may be used under the terms of the GNU |
31 | ** General Public License version 3.0 as published by the Free Software |
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33 | ** packaging of this file. Please review the following information to |
34 | ** ensure the GNU General Public License version 3.0 requirements will be |
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36 | ** |
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38 | ** $QT_END_LICENSE$ |
39 | ** |
40 | ****************************************************************************/ |
41 | |
42 | #ifndef QDBUSPENDINGREPLY_H |
43 | #define QDBUSPENDINGREPLY_H |
44 | |
45 | #include <QtCore/qglobal.h> |
46 | #include <QtDBus/qdbusmacros.h> |
47 | #include <QtDBus/qdbusargument.h> |
48 | #include <QtDBus/qdbuspendingcall.h> |
49 | |
50 | #ifndef QT_NO_DBUS |
51 | |
52 | QT_BEGIN_HEADER |
53 | |
54 | QT_BEGIN_NAMESPACE |
55 | |
56 | QT_MODULE(DBus) |
57 | |
58 | class Q_DBUS_EXPORT QDBusPendingReplyData: public QDBusPendingCall |
59 | { |
60 | protected: |
61 | QDBusPendingReplyData(); |
62 | ~QDBusPendingReplyData(); |
63 | void assign(const QDBusPendingCall &call); |
64 | void assign(const QDBusMessage &message); |
65 | |
66 | QVariant argumentAt(int index) const; |
67 | void setMetaTypes(int count, const int *metaTypes); |
68 | }; |
69 | |
70 | namespace QDBusPendingReplyTypes { |
71 | template<int Index, |
72 | typename T1, typename T2, typename T3, typename T4, |
73 | typename T5, typename T6, typename T7, typename T8> |
74 | struct Select |
75 | { |
76 | typedef Select<Index - 1, T2, T3, T4, T5, T6, T7, T8, void> Next; |
77 | typedef typename Next::Type Type; |
78 | }; |
79 | template<typename T1, typename T2, typename T3, typename T4, |
80 | typename T5, typename T6, typename T7, typename T8> |
81 | struct Select<0, T1, T2, T3, T4, T5, T6, T7, T8> |
82 | { |
83 | typedef T1 Type; |
84 | }; |
85 | |
86 | template<typename T1> inline int metaTypeFor(T1 * = 0) |
87 | { return qMetaTypeId<T1>(); } |
88 | // specialize for QVariant, allowing it to be used in place of QDBusVariant |
89 | template<> inline int metaTypeFor<QVariant>(QVariant *) |
90 | { return qMetaTypeId<QDBusVariant>(); } |
91 | |
92 | template<typename T1, typename T2, typename T3, typename T4, |
93 | typename T5, typename T6, typename T7, typename T8> |
94 | struct ForEach |
95 | { |
96 | typedef ForEach<T2, T3, T4, T5, T6, T7, T8, void> Next; |
97 | enum { Total = Next::Total + 1 }; |
98 | static inline void fillMetaTypes(int *p) |
99 | { |
100 | *p = metaTypeFor<T1>(0); |
101 | Next::fillMetaTypes(++p); |
102 | } |
103 | }; |
104 | template<> |
105 | struct ForEach<void, void, void, void, void, void, void, void> |
106 | { |
107 | enum { Total = 0 }; |
108 | static inline void fillMetaTypes(int *) |
109 | { } |
110 | }; |
111 | } // namespace QDBusPendingReplyTypes |
112 | |
113 | template<typename T1 = void, typename T2 = void, typename T3 = void, typename T4 = void, |
114 | typename T5 = void, typename T6 = void, typename T7 = void, typename T8 = void> |
115 | class QDBusPendingReply: |
116 | #ifdef Q_QDOC |
117 | public QDBusPendingCall |
118 | #else |
119 | public QDBusPendingReplyData |
120 | #endif |
121 | { |
122 | typedef QDBusPendingReplyTypes::ForEach<T1, T2, T3, T4, T5, T6, T7, T8> ForEach; |
123 | template<int Index> struct Select : |
124 | QDBusPendingReplyTypes::Select<Index, T1, T2, T3, T4, T5, T6, T7, T8> |
125 | { |
126 | }; |
127 | |
128 | public: |
129 | enum { Count = ForEach::Total }; |
130 | |
131 | inline QDBusPendingReply() |
132 | { } |
133 | inline QDBusPendingReply(const QDBusPendingReply &other) |
134 | : QDBusPendingReplyData(other) |
135 | { } |
136 | inline QDBusPendingReply(const QDBusPendingCall &call) |
137 | { *this = call; } |
138 | inline QDBusPendingReply(const QDBusMessage &message) |
139 | { *this = message; } |
140 | inline QDBusPendingReply &operator=(const QDBusPendingReply &other) |
141 | { assign(other); return *this; } |
142 | inline QDBusPendingReply &operator=(const QDBusPendingCall &call) |
143 | { assign(call); return *this; } |
144 | inline QDBusPendingReply &operator=(const QDBusMessage &message) |
145 | { assign(message); return *this; } |
146 | |
147 | inline int count() const { return Count; } |
148 | |
149 | #if defined(Q_QDOC) || defined(Q_NO_USING_KEYWORD) |
150 | inline QVariant argumentAt(int index) const |
151 | { return QDBusPendingReplyData::argumentAt(index); } |
152 | #else |
153 | using QDBusPendingReplyData::argumentAt; |
154 | #endif |
155 | |
156 | #if defined(Q_QDOC) |
157 | bool isFinished() const; |
158 | void waitForFinished(); |
159 | |
160 | bool isValid() const; |
161 | bool isError() const; |
162 | QDBusError error() const; |
163 | QDBusMessage reply() const; |
164 | |
165 | template<int Index> inline Type argumentAt() const; |
166 | inline T1 value() const; |
167 | inline operator T1() const; |
168 | #else |
169 | template<int Index> inline |
170 | const typename Select<Index>::Type argumentAt() const |
171 | { |
172 | // static assert? |
173 | Q_ASSERT_X(Index < count() && Index >= 0, "QDBusPendingReply::argumentAt" , |
174 | "Index out of bounds" ); |
175 | typedef typename Select<Index>::Type ResultType; |
176 | return qdbus_cast<ResultType>(argumentAt(Index), 0); |
177 | } |
178 | |
179 | inline typename Select<0>::Type value() const |
180 | { |
181 | return argumentAt<0>(); |
182 | } |
183 | |
184 | inline operator typename Select<0>::Type() const |
185 | { |
186 | return argumentAt<0>(); |
187 | } |
188 | #endif |
189 | |
190 | private: |
191 | inline void calculateMetaTypes() |
192 | { |
193 | if (!d) return; |
194 | int typeIds[Count > 0 ? Count : 1]; // use at least one since zero-sized arrays aren't valid |
195 | ForEach::fillMetaTypes(typeIds); |
196 | setMetaTypes(Count, typeIds); |
197 | } |
198 | |
199 | inline void assign(const QDBusPendingCall &call) |
200 | { |
201 | QDBusPendingReplyData::assign(call); |
202 | calculateMetaTypes(); |
203 | } |
204 | |
205 | inline void assign(const QDBusMessage &message) |
206 | { |
207 | QDBusPendingReplyData::assign(message); |
208 | calculateMetaTypes(); |
209 | } |
210 | }; |
211 | |
212 | QT_END_NAMESPACE |
213 | |
214 | QT_END_HEADER |
215 | |
216 | #endif // QT_NO_DBUS |
217 | #endif |
218 | |