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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** 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://www.qt.io/licensing.  For further information
** use the contact form at http://www.qt.io/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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file.  Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** 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.
**
****************************************************************************/

#ifndef UTILS_MACROEXPANDER_H
#define UTILS_MACROEXPANDER_H

#include "utils_global.h"

#include <functional>

#include <QList>
#include <QVector>
#include <QCoreApplication>

namespace Utils {

namespace Internal { class MacroExpanderPrivate; }

class MacroExpander;
typedef std::function<MacroExpander *()> MacroExpanderProvider;
typedef QVector<MacroExpander *> MacroExpanders;

class QTCREATOR_UTILS_EXPORT MacroExpander
{
    Q_DECLARE_TR_FUNCTIONS(Utils::MacroExpander)
    Q_DISABLE_COPY(MacroExpander)

public:
    explicit MacroExpander();
    ~MacroExpander();

    bool resolveMacro(const QString &name, QString *ret) const;

    QString value(const QByteArray &variable, bool *found = 0) const;

    QString expand(const QString &stringWithVariables) const;
    QByteArray expand(const QByteArray &stringWithVariables) const;

    QString expandProcessArgs(const QString &argsWithVariables) const;

    typedef std::function<QString(QString)> PrefixFunction;
    typedef std::function<bool(QString, QString *)> ResolverFunction;
    typedef std::function<QString()> StringFunction;
    typedef std::function<int()> IntFunction;

    void registerPrefix(const QByteArray &prefix,
        const QString &description, const PrefixFunction &value);

    void registerVariable(const QByteArray &variable,
        const QString &description, const StringFunction &value,
        bool visibleInChooser = true);

    void registerIntVariable(const QByteArray &variable,
        const QString &description, const IntFunction &value);

    void registerFileVariables(const QByteArray &prefix,
        const QString &heading, const StringFunction &value,
        bool visibleInChooser = true);

    void registerExtraResolver(const ResolverFunction &value);

    QList<QByteArray> visibleVariables() const;
    QString variableDescription(const QByteArray &variable) const;

    MacroExpanders subExpanders() const;

    QString displayName() const;
    void setDisplayName(const QString &displayName);

    void registerSubProvider(const MacroExpanderProvider &provider);

    bool isAccumulating() const;
    void setAccumulating(bool on);

private:
    friend class Internal::MacroExpanderPrivate;
    Internal::MacroExpanderPrivate *d;
};

QTCREATOR_UTILS_EXPORT MacroExpander *globalMacroExpander();

} // namespace Utils

#endif // UTILS_MACROEXPANDER_H