/****************************************************************************
**
** Copyright (C) 2012 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://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.
**
****************************************************************************/

#ifndef SETTINGSTUTILS_H
#define SETTINGSTUTILS_H

#include "utils_global.h"

QT_BEGIN_NAMESPACE
class QStringList;
QT_END_NAMESPACE

namespace Utils {

// Create a usable settings key from a category,
// for example Editor|C++ -> Editor_C__
QTCREATOR_UTILS_EXPORT QString settingsKey(const QString &category);

// Return the common prefix part of a string list:
// "C:\foo\bar1" "C:\foo\bar2"  -> "C:\foo\bar"
QTCREATOR_UTILS_EXPORT QString commonPrefix(const QStringList &strings);

// Return the common path of a list of files:
// "C:\foo\bar1" "C:\foo\bar2"  -> "C:\foo"
QTCREATOR_UTILS_EXPORT QString commonPath(const QStringList &files);

// On Linux/Mac replace user's home path with ~
// Uses cleaned path and tries to use absolute path of "path" if possible
// If path is not sub of home path, or when running on Windows, returns the input
QTCREATOR_UTILS_EXPORT QString withTildeHomePath(const QString &path);

class QTCREATOR_UTILS_EXPORT AbstractMacroExpander {
public:
    virtual ~AbstractMacroExpander() {}
    // Not const, as it may change the state of the expander.
    //! Find an expando to replace and provide a replacement string.
    //! \param str The string to scan
    //! \param pos Position to start scan on input, found position on output
    //! \param ret Replacement string on output
    //! \return Length of string part to replace, zero if no (further) matches found
    virtual int findMacro(const QString &str, int *pos, QString *ret) = 0;
};

class QTCREATOR_UTILS_EXPORT AbstractQtcMacroExpander : public AbstractMacroExpander {
public:
    virtual int findMacro(const QString &str, int *pos, QString *ret);
    //! Provide a replacement string for an expando
    //! \param name The name of the expando
    //! \param ret Replacement string on output
    //! \return True if the expando was found
    virtual bool resolveMacro(const QString &name, QString *ret) = 0;
};

QTCREATOR_UTILS_EXPORT void expandMacros(QString *str, AbstractMacroExpander *mx);
QTCREATOR_UTILS_EXPORT QString expandMacros(const QString &str, AbstractMacroExpander *mx);

} // namespace Utils

#endif // SETTINGSTUTILS_H