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3 | ** Copyright (C) 2016 The Qt Company Ltd. |
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6 | ** This file is part of the QtDBus module of the Qt Toolkit. |
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38 | ****************************************************************************/ |
39 | |
40 | #ifndef QDBUSPENDINGREPLY_H |
41 | #define QDBUSPENDINGREPLY_H |
42 | |
43 | #include <QtDBus/qtdbusglobal.h> |
44 | #include <QtDBus/qdbusargument.h> |
45 | #include <QtDBus/qdbuspendingcall.h> |
46 | |
47 | #ifndef QT_NO_DBUS |
48 | |
49 | QT_BEGIN_NAMESPACE |
50 | |
51 | |
52 | class Q_DBUS_EXPORT QDBusPendingReplyData: public QDBusPendingCall |
53 | { |
54 | protected: |
55 | QDBusPendingReplyData(); |
56 | ~QDBusPendingReplyData(); |
57 | void assign(const QDBusPendingCall &call); |
58 | void assign(const QDBusMessage &message); |
59 | |
60 | QVariant argumentAt(int index) const; |
61 | void setMetaTypes(int count, const int *metaTypes); |
62 | }; |
63 | |
64 | namespace QDBusPendingReplyTypes { |
65 | template<int Index, |
66 | typename T1, typename T2, typename T3, typename T4, |
67 | typename T5, typename T6, typename T7, typename T8> |
68 | struct Select |
69 | { |
70 | typedef Select<Index - 1, T2, T3, T4, T5, T6, T7, T8, void> Next; |
71 | typedef typename Next::Type Type; |
72 | }; |
73 | template<typename T1, typename T2, typename T3, typename T4, |
74 | typename T5, typename T6, typename T7, typename T8> |
75 | struct Select<0, T1, T2, T3, T4, T5, T6, T7, T8> |
76 | { |
77 | typedef T1 Type; |
78 | }; |
79 | |
80 | template<typename T1> inline int metaTypeFor(T1 * = nullptr) |
81 | { return qMetaTypeId<T1>(); } |
82 | // specialize for QVariant, allowing it to be used in place of QDBusVariant |
83 | template<> inline int metaTypeFor<QVariant>(QVariant *) |
84 | { return qMetaTypeId<QDBusVariant>(); } |
85 | |
86 | template<typename T1, typename T2, typename T3, typename T4, |
87 | typename T5, typename T6, typename T7, typename T8> |
88 | struct ForEach |
89 | { |
90 | typedef ForEach<T2, T3, T4, T5, T6, T7, T8, void> Next; |
91 | enum { Total = Next::Total + 1 }; |
92 | static inline void fillMetaTypes(int *p) |
93 | { |
94 | *p = metaTypeFor<T1>(nullptr); |
95 | Next::fillMetaTypes(++p); |
96 | } |
97 | }; |
98 | template<> |
99 | struct ForEach<void, void, void, void, void, void, void, void> |
100 | { |
101 | enum { Total = 0 }; |
102 | static inline void fillMetaTypes(int *) |
103 | { } |
104 | }; |
105 | |
106 | struct TypeIsVoid {}; |
107 | template <typename T> struct NotVoid { typedef T Type; }; |
108 | template <> struct NotVoid<void> { typedef TypeIsVoid Type; }; |
109 | } // namespace QDBusPendingReplyTypes |
110 | |
111 | template<typename T1 = void, typename T2 = void, typename T3 = void, typename T4 = void, |
112 | typename T5 = void, typename T6 = void, typename T7 = void, typename T8 = void> |
113 | class QDBusPendingReply: |
114 | #ifdef Q_CLANG_QDOC |
115 | public QDBusPendingCall |
116 | #else |
117 | public QDBusPendingReplyData |
118 | #endif |
119 | { |
120 | typedef QDBusPendingReplyTypes::ForEach<T1, T2, T3, T4, T5, T6, T7, T8> ForEach; |
121 | template<int Index> struct Select : |
122 | QDBusPendingReplyTypes::Select<Index, T1, T2, T3, T4, T5, T6, T7, T8> |
123 | { |
124 | }; |
125 | |
126 | public: |
127 | enum { Count = ForEach::Total }; |
128 | |
129 | inline QDBusPendingReply() |
130 | { } |
131 | inline QDBusPendingReply(const QDBusPendingReply &other) |
132 | : QDBusPendingReplyData(other) |
133 | { } |
134 | inline /*implicit*/ QDBusPendingReply(const QDBusPendingCall &call) // required by qdbusxml2cpp-generated code |
135 | { *this = call; } |
136 | inline /*implicit*/ QDBusPendingReply(const QDBusMessage &message) |
137 | { *this = message; } |
138 | inline QDBusPendingReply &operator=(const QDBusPendingReply &other) |
139 | { assign(other); return *this; } |
140 | inline QDBusPendingReply &operator=(const QDBusPendingCall &call) |
141 | { assign(call); return *this; } |
142 | inline QDBusPendingReply &operator=(const QDBusMessage &message) |
143 | { assign(message); return *this; } |
144 | |
145 | inline int count() const { return Count; } |
146 | |
147 | #if defined(Q_CLANG_QDOC) |
148 | QVariant argumentAt(int index) const; |
149 | #else |
150 | using QDBusPendingReplyData::argumentAt; |
151 | #endif |
152 | |
153 | #ifndef Q_CLANG_QDOC |
154 | template<int Index> inline |
155 | const typename Select<Index>::Type argumentAt() const |
156 | { |
157 | Q_STATIC_ASSERT_X(Index >= 0 && Index < Count, "Index out of bounds" ); |
158 | typedef typename Select<Index>::Type ResultType; |
159 | return qdbus_cast<ResultType>(argumentAt(Index), nullptr); |
160 | } |
161 | #endif |
162 | |
163 | #if defined(Q_CLANG_QDOC) |
164 | bool isFinished() const; |
165 | void waitForFinished(); |
166 | |
167 | bool isValid() const; |
168 | bool isError() const; |
169 | QDBusError error() const; |
170 | QDBusMessage reply() const; |
171 | |
172 | inline T1 value() const; |
173 | inline operator T1() const; |
174 | #else |
175 | inline typename Select<0>::Type value() const |
176 | { |
177 | return argumentAt<0>(); |
178 | } |
179 | |
180 | inline operator typename QDBusPendingReplyTypes::NotVoid<T1>::Type() const |
181 | { |
182 | return argumentAt<0>(); |
183 | } |
184 | #endif |
185 | |
186 | private: |
187 | inline void calculateMetaTypes() |
188 | { |
189 | if (!d) return; |
190 | int typeIds[Count > 0 ? Count : 1]; // use at least one since zero-sized arrays aren't valid |
191 | ForEach::fillMetaTypes(typeIds); |
192 | setMetaTypes(count: Count, metaTypes: typeIds); |
193 | } |
194 | |
195 | inline void assign(const QDBusPendingCall &call) |
196 | { |
197 | QDBusPendingReplyData::assign(call); |
198 | calculateMetaTypes(); |
199 | } |
200 | |
201 | inline void assign(const QDBusMessage &message) |
202 | { |
203 | QDBusPendingReplyData::assign(message); |
204 | calculateMetaTypes(); |
205 | } |
206 | }; |
207 | |
208 | QT_END_NAMESPACE |
209 | |
210 | #endif // QT_NO_DBUS |
211 | #endif |
212 | |