Import QMimeType / QMimeDatabase into QtCore.

History of the development before the import:
ssh://codereview.qt-project.org/playground/mimetypes.git

Mimetype definitions come from shared-mime-info where available (UNIX systems),
loaded using a mmap'ed binary cache generated by update-mime-database.
As a fallback if no cache is found, we parse the raw XML files otherwise.

This makes the MIME type support fast and with very low memory usage on UNIX,
and it makes it easy to use on Windows (no dependency on shared-mime-info,
Qt even includes a freedesktop.xml file to use if none are found on the system).

Change-Id: I27b05008216ff936dc463bd80d3893422bfb940e
Reviewed-by: Richard J. Moore <rich@kde.org>

1 files changed, 142 insertions, 0 deletions

diff --git a/src/corelib/mimetypes/qmimetypeparser_p.h b/src/corelib/mimetypes/qmimetypeparser_p.h
new file mode 100644
index 0000000000..455c07063c
--- /dev/null
+++ b/src/corelib/mimetypes/qmimetypeparser_p.h
@@ -0,0 +1,142 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the QtCore 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 MIMETYPEPARSER_P_H
+#define MIMETYPEPARSER_P_H
+
+#include "qmimedatabase_p.h"
+#include "qmimeprovider_p.h"
+
+QT_BEGIN_NAMESPACE
+
+class QIODevice;
+
+// XML tags in MIME files
+extern const char *const mimeInfoTagC;
+extern const char *const mimeTypeTagC;
+extern const char *const mimeTypeAttributeC;
+extern const char *const subClassTagC;
+extern const char *const commentTagC;
+extern const char *const genericIconTagC;
+extern const char *const nameAttributeC;
+extern const char *const globTagC;
+extern const char *const aliasTagC;
+extern const char *const patternAttributeC;
+extern const char *const weightAttributeC;
+extern const char *const caseSensitiveAttributeC;
+extern const char *const localeAttributeC;
+
+extern const char *const magicTagC;
+extern const char *const priorityAttributeC;
+
+extern const char *const matchTagC;
+extern const char *const matchValueAttributeC;
+extern const char *const matchTypeAttributeC;
+extern const char *const matchOffsetAttributeC;
+extern const char *const matchMaskAttributeC;
+
+class QMimeTypeParserBase
+{
+    Q_DISABLE_COPY(QMimeTypeParserBase)
+
+public:
+    QMimeTypeParserBase() {}
+    virtual ~QMimeTypeParserBase() {}
+
+    bool parse(QIODevice *dev, const QString &fileName, QString *errorMessage);
+
+protected:
+    virtual bool process(const QMimeType &t, QString *errorMessage) = 0;
+    virtual bool process(const QMimeGlobPattern &t, QString *errorMessage) = 0;
+    virtual void processParent(const QString &child, const QString &parent) = 0;
+    virtual void processAlias(const QString &alias, const QString &name) = 0;
+    virtual void processMagicMatcher(const QMimeMagicRuleMatcher &matcher) = 0;
+
+private:
+    enum ParseState {
+        ParseBeginning,
+        ParseMimeInfo,
+        ParseMimeType,
+        ParseComment,
+        ParseGenericIcon,
+        ParseIcon,
+        ParseGlobPattern,
+        ParseSubClass,
+        ParseAlias,
+        ParseMagic,
+        ParseMagicMatchRule,
+        ParseOtherMimeTypeSubTag,
+        ParseError
+    };
+
+    static ParseState nextState(ParseState currentState, const QStringRef &startElement);
+};
+
+
+class QMimeTypeParser : public QMimeTypeParserBase
+{
+public:
+    explicit QMimeTypeParser(QMimeXMLProvider &provider) : m_provider(provider) {}
+
+protected:
+    inline bool process(const QMimeType &t, QString *)
+    { m_provider.addMimeType(t); return true; }
+
+    inline bool process(const QMimeGlobPattern &glob, QString *)
+    { m_provider.addGlobPattern(glob); return true; }
+
+    inline void processParent(const QString &child, const QString &parent)
+    { m_provider.addParent(child, parent); }
+
+    inline void processAlias(const QString &alias, const QString &name)
+    { m_provider.addAlias(alias, name); }
+
+    inline void processMagicMatcher(const QMimeMagicRuleMatcher &matcher)
+    { m_provider.addMagicMatcher(matcher); }
+
+private:
+    QMimeXMLProvider &m_provider;
+};
+
+QT_END_NAMESPACE
+
+#endif // MIMETYPEPARSER_P_H