/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact:  Qt Software Information (qt-info@nokia.com)
**
** Commercial Usage
**
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
**
**************************************************************************/

#ifndef IVERSIONCONTROL_H
#define IVERSIONCONTROL_H

#include "core_global.h"

#include <QtCore/QObject>
#include <QtCore/QString>

namespace Core {

class CORE_EXPORT IVersionControl : public QObject
{
    Q_OBJECT
public:
    enum Operation { AddOperation, DeleteOperation, OpenOperation };

    IVersionControl(QObject *parent = 0) : QObject(parent) {}
    virtual ~IVersionControl() {}

    virtual QString name() const = 0;

    // Enable the VCS, that is, make its menu actions visible.
    virtual bool isEnabled() const = 0;
    virtual void setEnabled(bool enabled) = 0;

    // Returns whether files in this directory should be managed with this
    // version control.
    virtual bool managesDirectory(const QString &filename) const = 0;

    // This function should return the topmost directory, for which this
    // IVersionControl should be used. The VCSManager assumes that all files
    // in the returned directory are managed by the same IVersionControl
    // Note that this is used as an optimization, so that the VCSManager
    // doesn't need to call managesDirectory(..) for each directory
    // This function is called after finding out that the directory is managed
    // by a specific version control.
    virtual QString findTopLevelForDirectory(const QString &directory) const = 0;

    // Called to query whether a VCS supports the respective operations.
    virtual bool supportsOperation(Operation operation) const = 0;

    // Called prior to save, if the file is read only. Should be implemented
    // if the scc requires a operation before editing the file, e.g. 'p4 edit'
    // Note: The EditorManager calls this for the editors.
    virtual bool vcsOpen(const QString &fileName) = 0;

    // Called after a file has been added to a project If the version control
    // needs to know which files it needs to track you should reimplement this
    // function, e.g. 'p4 add', 'cvs add', 'svn add'.
    // Note: This function should be called from IProject subclasses after
    // files are added to the project
    virtual bool vcsAdd(const QString &filename) = 0;

    // Called after a file has been removed from the project (if the user
    // wants), e.g. 'p4 delete', 'svn delete'.
    // You probably want to call VcsManager::showDeleteDialog, which asks the
    // user to confirm the deletion
    virtual bool vcsDelete(const QString &filename) = 0;

    // TODO: ADD A WAY TO DETECT WHETHER A FILE IS MANAGED, e.g
    // virtual bool sccManaged(const QStryng &filename) = 0;
};

} // namespace Core

#endif // IVERSIONCONTROL_H