/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (info@qt.nokia.com)
**
**
** 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.
**
** 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at info@qt.nokia.com.
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**************************************************************************/

#ifndef IFILE_H
#define IFILE_H

#include "core_global.h"
#include <QtCore/QObject>

namespace Core {

class MimeType;
class InfoBar;

class CORE_EXPORT IFile : public QObject
{
    Q_OBJECT

public:
    // This enum must match the indexes of the reloadBehavior widget
    // in generalsettings.ui
    enum ReloadSetting {
        AlwaysAsk = 0,
        ReloadUnmodified = 1,
        IgnoreAll = 2
    };

    enum Utf8BomSetting {
        AlwaysAdd = 0,
        OnlyKeep = 1,
        AlwaysDelete = 2
    };

    enum ChangeTrigger {
        TriggerInternal,
        TriggerExternal
    };

    enum ChangeType {
        TypeContents,
        TypePermissions,
        TypeRemoved
    };

    enum ReloadBehavior {
        BehaviorAsk,
        BehaviorSilent
    };

    enum ReloadFlag {
        FlagReload,
        FlagIgnore
    };

    IFile(QObject *parent = 0);
    virtual ~IFile();

    virtual bool save(QString *errorString, const QString &fileName = QString(), bool autoSave = false) = 0;
    virtual QString fileName() const = 0;

    virtual QString defaultPath() const = 0;
    virtual QString suggestedFileName() const = 0;
    virtual QString mimeType() const = 0;

    virtual bool shouldAutoSave() const;
    virtual bool isModified() const = 0;
    virtual bool isReadOnly() const = 0;
    virtual bool isSaveAsAllowed() const = 0;

    virtual ReloadBehavior reloadBehavior(ChangeTrigger state, ChangeType type) const;
    virtual bool reload(QString *errorString, ReloadFlag flag, ChangeType type) = 0;
    virtual void rename(const QString &newName) = 0;

    virtual void checkPermissions();

    bool autoSave(QString *errorString, const QString &fileName);
    void setRestoredFrom(const QString &name);
    void removeAutoSaveFile();

    bool hasWriteWarning() const { return m_hasWriteWarning; }
    void setWriteWarning(bool has) { m_hasWriteWarning = has; }

    InfoBar *infoBar();

signals:
    void changed();

    void aboutToReload();
    void reloaded();

private:
    QString m_autoSaveName;
    InfoBar *m_infoBar;
    bool m_hasWriteWarning;
    bool m_restored;
};

} // namespace Core

#endif // IFILE_H
