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3** Copyright (C) 2016 The Qt Company Ltd.
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
57QT_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
68QT_BEGIN_NAMESPACE
69
70class QIODevice;
71class QMimeDatabase;
72class QMimeProviderBase;
73
74class QMimeDatabasePrivate
75{
76public:
77 Q_DISABLE_COPY_MOVE(QMimeDatabasePrivate)
78
79 QMimeDatabasePrivate();
80 ~QMimeDatabasePrivate();
81
82 static QMimeDatabasePrivate *instance();
83
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
106private:
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
115public:
116 const QString m_defaultMimeType;
117 QMutex mutex;
118};
119
120QT_END_NAMESPACE
121
122#endif // QMIMEDATABASE_P_H
123

source code of qtbase/src/corelib/mimetypes/qmimedatabase_p.h