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4 ** Copyright (C) 2015 Klaralvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author David Faure <david.faure@kdab.com>
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40 
41 #ifndef QMIMEDATABASE_P_H
42 #define QMIMEDATABASE_P_H
43 
44 //
45 //  W A R N I N G
46 //  -------------
47 //
48 // This file is not part of the Qt API.  It exists purely as an
49 // implementation detail.  This header file may change from version to
50 // version without notice, or even be removed.
51 //
52 // We mean it.
53 //
54 
55 #include "qmimetype.h"
56 
57 QT_REQUIRE_CONFIG(mimetype);
58 
59 #include "qmimetype_p.h"
60 #include "qmimeglobpattern_p.h"
61 
62 #include <QtCore/qelapsedtimer.h>
63 #include <QtCore/qmutex.h>
64 #include <QtCore/qvector.h>
65 
66 #include <memory>
67 
68 QT_BEGIN_NAMESPACE
69 
70 class QIODevice;
71 class QMimeDatabase;
72 class QMimeProviderBase;
73 
74 class QMimeDatabasePrivate
75 {
76 public:
77     Q_DISABLE_COPY_MOVE(QMimeDatabasePrivate)
78 
79     QMimeDatabasePrivate();
80     ~QMimeDatabasePrivate();
81 
82     static QMimeDatabasePrivate *instance();
83 
defaultMimeType()84     inline QString defaultMimeType() const { return m_defaultMimeType; }
85 
86     bool inherits(const QString &mime, const QString &parent);
87 
88     QList<QMimeType> allMimeTypes();
89 
90     QString resolveAlias(const QString &nameOrAlias);
91     QStringList parents(const QString &mimeName);
92     QMimeType mimeTypeForName(const QString &nameOrAlias);
93     QMimeType mimeTypeForFileNameAndData(const QString &fileName, QIODevice *device, int *priorityPtr);
94     QMimeType findByData(const QByteArray &data, int *priorityPtr);
95     QStringList mimeTypeForFileName(const QString &fileName);
96     QMimeGlobMatchResult findByFileName(const QString &fileName);
97 
98     // API for QMimeType. Takes care of locking the mutex.
99     void loadMimeTypePrivate(QMimeTypePrivate &mimePrivate);
100     void loadGenericIcon(QMimeTypePrivate &mimePrivate);
101     void loadIcon(QMimeTypePrivate &mimePrivate);
102     QStringList mimeParents(const QString &mimeName);
103     QStringList listAliases(const QString &mimeName);
104     bool mimeInherits(const QString &mime, const QString &parent);
105 
106 private:
107     using Providers = std::vector<std::unique_ptr<QMimeProviderBase>>;
108     const Providers &providers();
109     bool shouldCheck();
110     void loadProviders();
111 
112     mutable Providers m_providers;
113     QElapsedTimer m_lastCheck;
114 
115 public:
116     const QString m_defaultMimeType;
117     QMutex mutex;
118 };
119 
120 QT_END_NAMESPACE
121 
122 #endif // QMIMEDATABASE_P_H
123