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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.
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** accordance with the commercial license agreement provided with the
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** 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
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****************************************************************************/

#ifndef IDOCUMENT_H
#define IDOCUMENT_H

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

namespace Core {

class MimeType;
class InfoBar;

class CORE_EXPORT IDocument : 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 ChangeTrigger {
        TriggerInternal,
        TriggerExternal
    };

    enum ChangeType {
        TypeContents,
        TypePermissions,
        TypeRemoved
    };

    enum ReloadBehavior {
        BehaviorAsk,
        BehaviorSilent
    };

    enum ReloadFlag {
        FlagReload,
        FlagIgnore
    };

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

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

    QString filePath() const { return m_filePath; }
    virtual void setFilePath(const QString &filePath);
    QString displayName() const;
    void setDisplayName(const QString &name);

    virtual bool isFileReadOnly() const;
    bool isTemporary() const;
    void setTemporary(bool temporary);

    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 isSaveAsAllowed() const = 0;

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

    virtual void checkPermissions();

    bool autoSave(QString *errorString, const QString &filePath);
    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 reloadFinished(bool success);

    void filePathChanged(const QString &oldName, const QString &newName);

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

} // namespace Core

#endif // IDOCUMENT_H