core/MsBinaryFile/DocFile/OfficeArtContent.cpp

/*
 * Copyright (C) Ascensio System SIA, 2009-2026
 *
 * This program is a free software product. You can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License (AGPL)
 * version 3 as published by the Free Software Foundation, together with the
 * additional terms provided in the LICENSE file.
 *
 * This program is distributed WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For
 * details, see the GNU AGPL at: https://www.gnu.org/licenses/agpl-3.0.html
 *
 * You can contact Ascensio System SIA by email at info@onlyoffice.com
 * or by postal mail at 20A-6 Ernesta Birznieka-Upisha Street, Riga,
 * LV-1050, Latvia, European Union.
 *
 * The interactive user interfaces in modified versions of the Program
 * are required to display Appropriate Legal Notices in accordance with
 * Section 5 of the GNU AGPL version 3.
 *
 * No trademark rights are granted under this License.
 *
 * All non-code elements of the Product, including illustrations,
 * icon sets, and technical writing content, are licensed under the
 * Creative Commons Attribution-ShareAlike 4.0 International License:
 * https://creativecommons.org/licenses/by-sa/4.0/legalcode
 *
 * This license applies only to such non-code elements and does not
 * modify or replace the licensing terms applicable to the Program's
 * source code, which remains licensed under the GNU Affero General
 * Public License v3.
 *
 * SPDX-License-Identifier: AGPL-3.0-only
 */

#include "OfficeArtContent.h"

namespace DocFileFormat
{
	OfficeArtContent::OfficeArtContent (const FileInformationBlock* pFIB, POLE::Stream* pStream): m_pDrawingGroupData(NULL), m_pBackgroud(NULL), m_uLastShapeId(1024)
	{
		VirtualStreamReader oStearmReader(pStream, 0 , pFIB->m_nWordVersion);

		if (pFIB->m_FibWord97.fcDggInfo > oStearmReader.GetSize()) return;

		oStearmReader.Seek (pFIB->m_FibWord97.fcDggInfo, 0/*STREAM_SEEK_SET*/);

		if (pFIB->m_FibWord97.lcbDggInfo > 0)
		{
			unsigned int maxPosition	=	(int)(pFIB->m_FibWord97.fcDggInfo + pFIB->m_FibWord97.lcbDggInfo);

			// read the DrawingGroupData
			m_pDrawingGroupData = dynamic_cast<DrawingGroup*>(RecordFactory::ReadRecord (&oStearmReader, 0));

			while (oStearmReader.GetPosition() < maxPosition)
			{
				OfficeArtWordDrawing drawing;
				drawing.dgglbl = (DrawingType)oStearmReader.ReadByte();
				drawing.container =	dynamic_cast<DrawingContainer*>(RecordFactory::ReadRecord (&oStearmReader, 0));

				for (size_t i = 0; drawing.container && i < drawing.container->Children.size(); ++i)
				{
					Record* groupChild = drawing.container->Children[i];
					if (groupChild)
					{
						if (GroupContainer::TYPE_CODE_0xF003 == groupChild->TypeCode)
						{
							GroupContainer* group = dynamic_cast<GroupContainer*>(groupChild);
							if (group)
							{
								group->Index =	(int)i;
							}
						}
						else if (ShapeContainer::TYPE_CODE_0xF004 == groupChild->TypeCode)
						{
							ShapeContainer* shape = dynamic_cast<ShapeContainer*>(groupChild);
							if (shape)
							{
								shape->m_nIndex = (int)i;
								if (shape->m_bBackground)
								{
									m_pBackgroud = shape;
								}
							}
						}
						else if (DrawingRecord::TYPE_CODE_0xF008 == groupChild->TypeCode)
						{
							DrawingRecord* dr = dynamic_cast<DrawingRecord*>(groupChild);
							if (dr)
							{
								m_uLastShapeId = dr->spidCur;
							}
						}
					}
				}

				m_arrDrawings.push_back( drawing );
			}
		}
	}
	OfficeArtContent::~OfficeArtContent()
	{
		RELEASEOBJECT (m_pDrawingGroupData);

		for (auto& iter : m_arrDrawings)
			RELEASEOBJECT(iter.container);
	}

	ShapeContainer* OfficeArtContent::GetShapeContainer (int spid)
	{
		ShapeContainer* ret = NULL;

		for (auto& iter : m_arrDrawings)
		{
			if (iter.container)
			{
				GroupContainer* group = iter.container->FirstChildWithType<GroupContainer>();
				if (group)
				{
					for (size_t i = 1; i < group->Children.size(); ++i)
					{
						Record* groupChild = group->Children[i];

						if (groupChild->TypeCode == GroupContainer::TYPE_CODE_0xF003)
						{
							//It's a group of shapes
							GroupContainer* subgroup = dynamic_cast<GroupContainer*>(groupChild);

							//the referenced shape must be the first shape in the group
							ShapeContainer* container = subgroup ? dynamic_cast<ShapeContainer*>(subgroup->Children[0]) : NULL;
							Shape* shape = container ? dynamic_cast<Shape*>(container->Children[1]) : NULL;

							if (shape && shape->GetShapeID() == spid)
							{
								ret = container;
								break;
							}
						}
						else if (groupChild->TypeCode == ShapeContainer::TYPE_CODE_0xF004)
						{
							//It's a singe shape
							ShapeContainer* container = dynamic_cast<ShapeContainer*>(groupChild);
							Shape* shape = container ? dynamic_cast<Shape*>(container->Children[0]) : NULL;

							if (shape && shape->GetShapeID() == spid)
							{
								ret = container;
								break;
							}
						}
					}
				}
				else
				{
					continue;
				}

				if (ret)
					break;
			}
		}

		return ret;
	}
	const DrawingGroup* OfficeArtContent::GetDrawingGroup () const
	{
		return m_pDrawingGroupData;
	}
}