qgsmimedatautils.h

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/***************************************************************************
    qgsmimedatautils.h
    ---------------------
    begin                : November 2011
    copyright            : (C) 2011 by Martin Dobias
    email                : wonder dot sk at gmail dot com
 ***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
#ifndef QGSMIMEDATAUTILS_H
#define QGSMIMEDATAUTILS_H

#include <QMimeData>
#include <QStringList>

#include "qgis_core.h"

class QgsLayerItem;
class QgsLayerTreeNode;
class QgsVectorLayer;
class QgsRasterLayer;
class QgsMeshLayer;

class CORE_EXPORT QgsMimeDataUtils
{
  public:

    struct CORE_EXPORT Uri
    {
      Uri() = default;
      explicit Uri( QString &encData );

      bool isValid() const { return !layerType.isEmpty(); }

      QString data() const;

      QgsVectorLayer *vectorLayer( bool &owner, QString &error ) const;

      QgsRasterLayer *rasterLayer( bool &owner, QString &error ) const;

      QgsMeshLayer *meshLayer( bool &owner, QString &error ) const;

      QString layerType;

      QString providerKey;
      QString name;
      QString uri;
      QStringList supportedCrs;
      QStringList supportedFormats;
    };
    typedef QList<QgsMimeDataUtils::Uri> UriList;

    static QMimeData *encodeUriList( const UriList &layers );

    static bool isUriList( const QMimeData *data );

    static UriList decodeUriList( const QMimeData *data );

    static QByteArray layerTreeNodesToUriList( const QList<QgsLayerTreeNode *> &nodes );

  private:
    static QString encode( const QStringList &items );
    static QStringList decode( const QString &encoded );
    static QByteArray uriListToByteArray( const UriList &layers );


    friend class TestQgsMimeDataUtils;

};

Q_DECLARE_METATYPE( QgsMimeDataUtils::UriList )

#endif // QGSMIMEDATAUTILS_H