/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** No Commercial Usage
**
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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, 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**************************************************************************/

#ifndef BASETEXTDOCUMENT_H
#define BASETEXTDOCUMENT_H

#include "texteditor_global.h"
#include "storagesettings.h"
#include "itexteditor.h"
#include "tabsettings.h"

#include <coreplugin/ifile.h>

QT_BEGIN_NAMESPACE
class QTextCursor;
class QTextDocument;
QT_END_NAMESPACE

namespace TextEditor {

class SyntaxHighlighter;

class DocumentMarker : public ITextMarkable
{
    Q_OBJECT
public:
    DocumentMarker(QTextDocument *);

    // ITextMarkable
    bool addMark(ITextMark *mark, int line);
    TextMarks marksAt(int line) const;
    void removeMark(ITextMark *mark);
    bool hasMark(ITextMark *mark) const;
    void updateMark(ITextMark *mark);

private:
    QTextDocument *document;
};


class TEXTEDITOR_EXPORT BaseTextDocument : public Core::IFile
{
    Q_OBJECT

public:
    BaseTextDocument();
    ~BaseTextDocument();
    void setStorageSettings(const StorageSettings &storageSettings) { m_storageSettings = storageSettings; }
    void setTabSettings(const TabSettings &tabSettings) { m_tabSettings = tabSettings; }

    inline const StorageSettings &storageSettings() const { return m_storageSettings; }
    inline const TabSettings &tabSettings() const { return m_tabSettings; }

    DocumentMarker *documentMarker() const { return m_documentMarker; }

    //IFile
    virtual bool save(const QString &fileName = QString());
    virtual QString fileName() const { return m_fileName; }
    virtual bool isReadOnly() const;
    virtual bool isModified() const;
    virtual bool isSaveAsAllowed() const { return true; }
    virtual void checkPermissions();
    ReloadBehavior reloadBehavior(ChangeTrigger state, ChangeType type) const;
    void reload(ReloadFlag flag, ChangeType type);
    virtual QString mimeType() const;
    void setMimeType(const QString &mt);
    virtual void rename(const QString &newName);

    virtual QString defaultPath() const { return m_defaultPath; }
    virtual QString suggestedFileName() const { return m_suggestedFileName; }

    void setDefaultPath(const QString &defaultPath) {  m_defaultPath = defaultPath; }
    void setSuggestedFileName(const QString &suggestedFileName) { m_suggestedFileName = suggestedFileName; }

    virtual bool open(const QString &fileName = QString());
    virtual void reload();

    QTextDocument *document() const { return m_document; }
    void setSyntaxHighlighter(SyntaxHighlighter *highlighter);
    SyntaxHighlighter *syntaxHighlighter() const { return m_highlighter; }


    inline bool isBinaryData() const { return m_isBinaryData; }
    inline bool hasDecodingError() const { return m_hasDecodingError || m_isBinaryData; }
    inline QTextCodec *codec() const { return m_codec; }
    inline void setCodec(QTextCodec *c) { m_codec = c; }
    inline QByteArray decodingErrorSample() const { return m_decodingErrorSample; }

    void reload(QTextCodec *codec);

    void cleanWhitespace(const QTextCursor &cursor);

signals:
    void titleChanged(QString title);

private:
    QString m_fileName;
    QString m_defaultPath;
    QString m_suggestedFileName;
    QString m_mimeType;
    StorageSettings m_storageSettings;
    TabSettings m_tabSettings;
    QTextDocument *m_document;
    DocumentMarker *m_documentMarker;
    SyntaxHighlighter *m_highlighter;

    enum LineTerminatorMode {
        LFLineTerminator,
        CRLFLineTerminator,
        NativeLineTerminator =
#if defined (Q_OS_WIN)
        CRLFLineTerminator
#else
        LFLineTerminator
#endif
    };
    LineTerminatorMode m_lineTerminatorMode;
    QTextCodec *m_codec;

    bool m_fileIsReadOnly;
    bool m_isBinaryData;
    bool m_hasDecodingError;
    QByteArray m_decodingErrorSample;

    void cleanWhitespace(QTextCursor& cursor, bool cleanIndentation, bool inEntireDocument);
    void ensureFinalNewLine(QTextCursor& cursor);
    void documentClosing();
};

} // namespace TextEditor

#endif // BASETEXTDOCUMENT_H