Import qlogger framework

Merge most parts of the qlogger framework from

git://gitorious.org/qtplayground/qlogger.git

The categorized logging feature is a replacement for qDebug, qWarning and
friends. With logging statements in an app/library, a developer can
turn on the statements they care about and turn off the ones they don't.

Most work for this was done by Wolfgang Beck and Lincoln Ramsay.

Task-number: QTBUG-25694
Change-Id: Ib0cdfbbf3694f86ad9ec553b2ea36f09a477cded
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 135 insertions, 0 deletions

diff --git a/src/corelib/io/qloggingregistry_p.h b/src/corelib/io/qloggingregistry_p.h
new file mode 100644
index 0000000000..cbf7aecc4f
--- /dev/null
+++ b/src/corelib/io/qloggingregistry_p.h
@@ -0,0 +1,135 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QLOGGINGREGISTRY_P_H
+#define QLOGGINGREGISTRY_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of a number of Qt sources files.  This header file may change from
+// version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtCore/qloggingcategory.h>
+#include <QtCore/qmap.h>
+#include <QtCore/qmutex.h>
+#include <QtCore/qstring.h>
+#include <QtCore/qtextstream.h>
+#include <QtCore/qvector.h>
+
+QT_BEGIN_NAMESPACE
+
+class QLoggingRule
+{
+public:
+    QLoggingRule();
+    QLoggingRule(const QString &pattern, bool enabled);
+    int pass(const QString &categoryName, QtMsgType type) const;
+
+    enum PatternFlag {
+        Invalid = 0x0,
+        FullText = 0x1,
+        LeftFilter = 0x2,
+        RightFilter = 0x4,
+        MidFilter = LeftFilter |  RightFilter
+    };
+    Q_DECLARE_FLAGS(PatternFlags, PatternFlag)
+
+    QString pattern;
+    PatternFlags flags;
+    bool enabled;
+
+private:
+    void parse();
+};
+
+Q_DECLARE_OPERATORS_FOR_FLAGS(QLoggingRule::PatternFlags)
+Q_DECLARE_TYPEINFO(QLoggingRule, Q_MOVABLE_TYPE);
+
+class QLoggingRulesParser
+{
+private:
+    explicit QLoggingRulesParser(class QLoggingRegistry *logging);
+
+public:
+    void setRules(const QString &content);
+
+private:
+    void parseRules(QTextStream &stream);
+    QLoggingRegistry *registry;
+
+    friend class QLoggingRegistry;
+};
+
+class QLoggingRegistry
+{
+public:
+    QLoggingRegistry();
+
+    void registerCategory(QLoggingCategory *category);
+    void unregisterCategory(QLoggingCategory *category);
+
+    void setRules(const QVector<QLoggingRule> &rules);
+
+    QLoggingCategory::CategoryFilter
+    installFilter(QLoggingCategory::CategoryFilter filter);
+
+    static QLoggingRegistry *instance();
+
+    QLoggingRulesParser rulesParser;
+
+private:
+    static void defaultCategoryFilter(QLoggingCategory *category);
+
+    QMutex registryMutex;
+    QVector<QLoggingRule> rules;
+    QList<QLoggingCategory*> categories;
+    QLoggingCategory::CategoryFilter categoryFilter;
+};
+
+QT_END_NAMESPACE
+
+#endif // QLOGGINGREGISTRY_P_H