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716 lines
19 KiB
C++
716 lines
19 KiB
C++
/*
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* (c) Copyright Ascensio System SIA 2010-2018
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*
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* This program is a free software product. You can redistribute it and/or
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* modify it under the terms of the GNU Affero General Public License (AGPL)
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* version 3 as published by the Free Software Foundation. In accordance with
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* Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
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* that Ascensio System SIA expressly excludes the warranty of non-infringement
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* of any third-party rights.
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*
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* This program is distributed WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For
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* details, see the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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*
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* You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia,
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* EU, LV-1021.
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*
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* The interactive user interfaces in modified source and object code versions
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* of the Program must display Appropriate Legal Notices, as required under
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* Section 5 of the GNU AGPL version 3.
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*
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* Pursuant to Section 7(b) of the License you must retain the original Product
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* logo when distributing the program. Pursuant to Section 7(e) we decline to
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* grant you any rights under trademark law for use of our trademarks.
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*
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* All the Product's GUI elements, including illustrations and icon sets, as
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* well as technical writing content are licensed under the terms of the
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* Creative Commons Attribution-ShareAlike 4.0 International. See the License
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* terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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*
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*/
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#include "Objects.h"
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#include "Utils.h"
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#include "Types.h"
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#include "Encrypt.h"
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#include "Streams.h"
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#include "Document.h"
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// Если установлен бит OTYPE_DIRECT, значит данный объект принадлежит другому
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// объекту. Если установлен бит OTYPE_INDIRECT, значит объект управляется таблицей xref.
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#define FLAG_NONE 0x0
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#define FLAG_HIDDEN 0x1
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#define FLAG_INDIRECT 0x4
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#define FLAG_DIRECT 0x8
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//------ Значения относящиеся к объекту xref ------------------------------------
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#define FREE_ENTRY 'f'
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#define IN_USE_ENTRY 'n'
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#define RELEASE_OBJECT(pObject) \
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if (pObject && !pObject->IsIndirect())\
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delete pObject;\
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static const BYTE UNICODE_HEADER[] ={ 0xFE, 0xFF };
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namespace PdfWriter
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{
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//----------------------------------------------------------------------------------------
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// CObjectBase
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//----------------------------------------------------------------------------------------
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bool CObjectBase::IsHidden() const
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{
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return (m_unFlags & FLAG_HIDDEN ? true : false);
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}
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bool CObjectBase::IsDirect() const
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{
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return (m_unFlags & FLAG_DIRECT ? true : false);
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}
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bool CObjectBase::IsIndirect() const
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{
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return (m_unFlags & FLAG_INDIRECT ? true : false);
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}
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void CObjectBase::SetDirect()
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{
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m_unFlags |= FLAG_DIRECT;
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}
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void CObjectBase::SetIndirect()
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{
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m_unFlags |= FLAG_INDIRECT;
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}
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void CObjectBase::SetHidden()
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{
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m_unFlags |= FLAG_HIDDEN;
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}
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void CObjectBase::WriteValue(CStream* pStream, CEncrypt* pEncrypt)
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{
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switch (GetType())
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{
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case object_type_NAME: pStream->Write((CNameObject*)this); break;
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case object_type_NUMBER: pStream->Write((CNumberObject*)this); break;
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case object_type_REAL: pStream->Write((CRealObject*)this); break;
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case object_type_STRING: pStream->Write((CStringObject*)this, pEncrypt); break;
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case object_type_BINARY: pStream->Write((CBinaryObject*)this, pEncrypt); break;
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case object_type_ARRAY: pStream->Write((CArrayObject*)this, pEncrypt); break;
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case object_type_DICT: pStream->Write((CDictObject*)this, pEncrypt); break;
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case object_type_BOOLEAN:pStream->Write((CBoolObject*)this); break;
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case object_type_NULL: pStream->WriteStr("null"); break;
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}
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}
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void CObjectBase::Write (CStream* pStream, CEncrypt* pEncrypt)
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{
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if (IsHidden())
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return;
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if (object_type_PROXY == GetType())
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{
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char sBuf[SHORT_BUFFER_SIZE];
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char *pBuf = sBuf;
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char *pEndPtr = sBuf + SHORT_BUFFER_SIZE - 1;
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CObjectBase* pObject = ((CProxyObject*)this)->Get();
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pBuf = ItoA(pBuf, pObject->m_unObjId & 0x00FFFFFF, pEndPtr);
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*pBuf++ = ' ';
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pBuf = ItoA(pBuf, pObject->m_unGenNo, pEndPtr);
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StrCpy(pBuf, " R", pEndPtr);
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pStream->WriteStr(sBuf);
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}
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else
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{
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WriteValue(pStream, pEncrypt);
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}
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}
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//----------------------------------------------------------------------------------------
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// CNameObject
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//----------------------------------------------------------------------------------------
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void CNameObject::Set(const char* sValue)
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{
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if (!sValue || 0 == sValue[0])
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m_sValue[0] = 0;
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else
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{
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StrCpy(m_sValue, sValue, m_sValue + LIMIT_MAX_NAME_LEN);
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}
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}
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//----------------------------------------------------------------------------------------
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// CStringObject
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//----------------------------------------------------------------------------------------
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CStringObject::CStringObject(const char* sValue)
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{
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m_pValue = NULL;
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m_unLen = 0;
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Set(sValue);
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}
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CStringObject::~CStringObject()
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{
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if (m_pValue)
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delete[] m_pValue;
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}
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void CStringObject::Set(const char* sValue)
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{
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if (m_pValue)
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{
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delete[] m_pValue;
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m_unLen = 0;
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}
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unsigned int unLen = StrLen(sValue, LIMIT_MAX_STRING_LEN);
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m_pValue = new BYTE[unLen + 1];
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StrCpy((char*)m_pValue, (char*)sValue, (char*)(m_pValue + unLen));
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m_unLen = unLen;
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}
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//----------------------------------------------------------------------------------------
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// CBinaryObject
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//----------------------------------------------------------------------------------------
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CBinaryObject::CBinaryObject(const BYTE* pValue, unsigned int unLen)
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{
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m_pValue = NULL;
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m_unLen = 0;
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Set(pValue, unLen);
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}
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CBinaryObject::~CBinaryObject()
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{
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if (m_pValue)
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delete[] m_pValue;
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}
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void CBinaryObject::Set(const BYTE* pValue, unsigned int unLen)
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{
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unLen = std::min((unsigned int)LIMIT_MAX_STRING_LEN, unLen);
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if (m_pValue)
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{
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delete[] m_pValue;
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m_pValue = NULL;
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m_unLen = 0;
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}
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if (!pValue || !unLen)
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return;
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m_unLen = unLen;
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m_pValue = new BYTE[unLen];
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MemCpy(m_pValue, pValue, unLen);
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}
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//----------------------------------------------------------------------------------------
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// CArrayObject
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//----------------------------------------------------------------------------------------
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void CArrayObject::Add(CObjectBase* pObject)
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{
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if (!pObject)
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return;
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// Не даем писать сложные объекты в массив не по ссылке
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if (pObject->IsDirect())
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return;
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if (GetCount() >= LIMIT_MAX_ARRAY)
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{
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RELEASE_OBJECT(pObject);
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return;
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}
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if (pObject->IsIndirect())
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{
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CObjectBase* pProxy = new CProxyObject(pObject);
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if (!pProxy)
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{
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RELEASE_OBJECT(pObject);
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return;
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}
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pObject = pProxy;
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}
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pObject->SetDirect();
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m_arrList.push_back(pObject);
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}
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void CArrayObject::Add(bool bValue)
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{
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CObjectBase* pBool = new CBoolObject(bValue);
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if (pBool)
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Add(pBool);
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}
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void CArrayObject::Add(int nValue)
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{
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CObjectBase* pNumber = new CNumberObject(nValue);
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if (pNumber)
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Add(pNumber);
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}
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void CArrayObject::Add(unsigned int unValue)
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{
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CObjectBase* pNumber = new CNumberObject((int)unValue);
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if (pNumber)
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Add(pNumber);
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}
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void CArrayObject::Add(float fValue)
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{
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CObjectBase* pReal = new CRealObject(fValue);
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if (pReal)
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Add(pReal);
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}
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void CArrayObject::Add(const char* sName)
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{
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CObjectBase* pName = new CNameObject(sName);
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if (pName)
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Add(pName);
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}
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void CArrayObject::Add(double dValue)
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{
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CObjectBase* pReal = new CRealObject(dValue);
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if (pReal)
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Add(pReal);
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}
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void CArrayObject::Insert(CObjectBase *pTarget, CObjectBase* pObject)
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{
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if (!pObject)
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return;
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if (pObject->IsDirect())
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return;
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if (GetCount() >= LIMIT_MAX_ARRAY)
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{
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RELEASE_OBJECT(pObject);
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return;
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}
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if (pObject->IsIndirect())
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{
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CObjectBase* pProxy = new CProxyObject(pObject);
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if (!pProxy)
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{
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RELEASE_OBJECT(pObject);
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return;
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}
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pObject = pProxy;
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}
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pObject->SetDirect();
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//получаем target-object из списка
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//рассмотреть случай, когда указатель на содержимое списка
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//может быть proxy-object.
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for (int nIndex = 0, nCount = m_arrList.size(); nIndex < nCount; nIndex++)
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{
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CObjectBase* pObjectItem = m_arrList.at(nIndex);
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if (object_type_PROXY == pObjectItem->GetType())
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pObjectItem = ((CProxyObject*)pObjectItem)->Get();
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if (pObjectItem == pTarget)
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{
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m_arrList.insert(m_arrList.begin() + nIndex, pObject);
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return;
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}
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}
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// Дошли до сюда, значит не вставили данный объект, поэтому удаляем его
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RELEASE_OBJECT(pObject);
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}
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CObjectBase* CArrayObject::Get(unsigned int unIndex, bool bCheckProxy) const
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{
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if (unIndex >= m_arrList.size())
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return NULL;
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CObjectBase* pObject = m_arrList.at(unIndex);
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if (bCheckProxy && object_type_PROXY == pObject->GetType())
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pObject = ((CProxyObject*)pObject)->Get();
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return pObject;
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}
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void CArrayObject::Clear()
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{
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for (int nIndex = 0, nCount = m_arrList.size(); nIndex < nCount; nIndex++)
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{
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CObjectBase* pObject = m_arrList.at(nIndex);
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RELEASE_OBJECT(pObject);
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}
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m_arrList.clear();
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}
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CArrayObject* CArrayObject::CreateBox(const TBox& oBox)
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{
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CArrayObject* pArray = new CArrayObject();
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if (!pArray)
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return NULL;
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pArray->Add(oBox.fLeft);
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pArray->Add(oBox.fBottom);
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pArray->Add(oBox.fRight);
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pArray->Add(oBox.fTop);
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return pArray;
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}
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CArrayObject* CArrayObject::CreateBox(double dL, double dB, double dR, double dT)
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{
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CArrayObject* pArray = new CArrayObject();
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if (!pArray)
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return NULL;
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pArray->Add(dL);
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pArray->Add(dB);
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pArray->Add(dR);
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pArray->Add(dT);
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return pArray;
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}
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//----------------------------------------------------------------------------------------
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// CDictObject
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//----------------------------------------------------------------------------------------
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CDictObject::CDictObject()
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{
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m_unFilter = STREAM_FILTER_NONE;
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m_unPredictor = STREAM_PREDICTOR_NONE;
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m_pStream = NULL;
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}
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CDictObject::CDictObject(CXref* pXref)
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{
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m_unFilter = STREAM_FILTER_NONE;
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m_unPredictor = STREAM_PREDICTOR_NONE;
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m_pStream = NULL;
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CNumberObject* pLength = new CNumberObject(0);
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// Только stream object добавляются в таблицу xref автоматически
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pXref->Add((CObjectBase*)this);
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pXref->Add((CObjectBase*)pLength);
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Add("Length", (CObjectBase*)pLength);
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m_pStream = new CMemoryStream(STREAM_BUF_SIZ);
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}
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CDictObject::~CDictObject()
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{
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for (auto const &oIter : m_mList)
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{
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CObjectBase* pObject = oIter.second;
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RELEASE_OBJECT(pObject);
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}
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if (m_pStream)
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delete m_pStream;
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}
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CObjectBase* CDictObject::Get(const std::string& sKey) const
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{
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std::map<std::string, CObjectBase*>::const_iterator oIter = m_mList.find(sKey);
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if (m_mList.end() != oIter)
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{
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CObjectBase* pObject = oIter->second;
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if (pObject && object_type_PROXY == pObject->GetType())
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pObject = ((CProxyObject*)pObject)->Get();
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return pObject;
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}
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return NULL;
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}
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void CDictObject::Add(const std::string& sKey, CObjectBase* pObject)
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{
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if (!pObject)
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return;
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if (pObject->IsDirect())
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return;
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if (m_mList.size() >= LIMIT_MAX_DICT_ELEMENT)
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{
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RELEASE_OBJECT(pObject);
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return;
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}
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// Удаляем старую запись, если она была
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Remove(sKey);
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if (pObject->IsIndirect())
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{
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CObjectBase* pProxy = new CProxyObject(pObject);
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pObject = pProxy;
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}
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pObject->SetDirect();
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m_mList.insert(std::make_pair(sKey, pObject));
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}
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void CDictObject::Remove(const std::string& sKey)
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{
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std::map<std::string, CObjectBase*>::const_iterator pIter = m_mList.find(sKey);
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if (m_mList.end() != pIter)
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{
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CObjectBase* pObject = pIter->second;
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RELEASE_OBJECT(pObject);
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m_mList.erase(sKey);
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}
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}
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void CDictObject::Add(const std::string& sKey, const char* sName)
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{
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Add(sKey, new CNameObject(sName));
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}
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void CDictObject::Add(const std::string& sKey, int nNumber)
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{
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Add(sKey, new CNumberObject(nNumber));
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}
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void CDictObject::Add(const std::string& sKey, unsigned int unNumber)
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{
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Add(sKey, (int)unNumber);
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}
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void CDictObject::Add(const std::string& sKey, float fReal)
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{
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Add(sKey, new CRealObject(fReal));
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}
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void CDictObject::Add(const std::string& sKey, double dReal)
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{
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Add(sKey, new CRealObject(dReal));
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}
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void CDictObject::Add(const std::string& sKey, bool bBool)
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{
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Add(sKey, new CBoolObject(bBool));
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}
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const char* CDictObject::GetKey(CObjectBase* pObject)
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{
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for (auto const &oIter : m_mList)
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{
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CObjectBase* pListObject = oIter.second;
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if (pListObject && object_type_PROXY == pListObject->GetType())
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pListObject = ((CProxyObject*)pListObject)->Get();
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if (pListObject == pObject)
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return oIter.first.c_str();
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}
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return NULL;
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}
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void CDictObject::WriteToStream(CStream* pStream, CEncrypt* pEncrypt)
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{
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for (auto const &oIter : m_mList)
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{
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CObjectBase* pObject = oIter.second;
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if (!pObject)
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continue;
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if (pObject->IsHidden())
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{
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// ничего не делаем
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}
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else
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{
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pStream->WriteEscapeName(oIter.first.c_str());
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pStream->WriteChar(' ');
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pStream->Write(pObject, pEncrypt);
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pStream->WriteStr("\012");
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}
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}
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}
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void CDictObject::SetStream(CXref* pXref, CStream* pStream)
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{
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if (m_pStream)
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delete m_pStream;
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if (!Get("Length"))
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{
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CNumberObject* pLength = new CNumberObject(0);
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// Только stream object добавляются в таблицу xref автоматически
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pXref->Add((CObjectBase*)this);
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pXref->Add((CObjectBase*)pLength);
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Add("Length", (CObjectBase*)pLength);
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}
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m_pStream = pStream;
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}
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//----------------------------------------------------------------------------------------
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// CXref
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//----------------------------------------------------------------------------------------
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CXref::CXref(CDocument* pDocument, unsigned int unOffset)
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{
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m_pDocument = pDocument;
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m_unStartOffset = unOffset;
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m_unAddr = 0;
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m_pPrev = NULL;
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m_pTrailer = NULL;
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if (0 == m_unStartOffset)
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{
|
||
// Добавляем первый элемент в таблицу xref
|
||
// он должен иметь вид 0000000000 65535 f
|
||
TXrefEntry* pEntry = new TXrefEntry;
|
||
pEntry->nEntryType = FREE_ENTRY;
|
||
pEntry->unByteOffset = 0;
|
||
pEntry->unGenNo = MAX_GENERATION_NUM;
|
||
pEntry->pObject = NULL;
|
||
m_arrEntries.push_back(pEntry);
|
||
}
|
||
|
||
m_pTrailer = new CDictObject();
|
||
}
|
||
CXref::~CXref()
|
||
{
|
||
for (int nIndex = 0, nCount = m_arrEntries.size(); nIndex < nCount; nIndex++)
|
||
{
|
||
TXrefEntry* pEntry = m_arrEntries.at(nIndex);
|
||
if (pEntry)
|
||
{
|
||
CObjectBase* pObject = pEntry->pObject;
|
||
if (pObject)
|
||
delete pObject;
|
||
}
|
||
|
||
delete pEntry;
|
||
}
|
||
|
||
if (m_pTrailer)
|
||
delete m_pTrailer;
|
||
|
||
if (m_pPrev)
|
||
delete m_pPrev;
|
||
}
|
||
TXrefEntry* CXref::GetEntry(unsigned int unIndex) const
|
||
{
|
||
return m_arrEntries.at(unIndex);
|
||
}
|
||
TXrefEntry* CXref::GetEntryByObjectId(unsigned int nObjectId) const
|
||
{
|
||
const CXref* pXref = this;
|
||
|
||
while (pXref)
|
||
{
|
||
if (pXref->m_arrEntries.size() + pXref->m_unStartOffset > nObjectId)
|
||
return NULL;
|
||
|
||
if (pXref->m_unStartOffset < nObjectId)
|
||
{
|
||
for (unsigned int unIndex = 0, nCount = pXref->m_arrEntries.size(); unIndex < nCount; unIndex++)
|
||
{
|
||
if (pXref->m_unStartOffset + unIndex == nObjectId)
|
||
{
|
||
return pXref->GetEntry(unIndex);
|
||
}
|
||
}
|
||
}
|
||
|
||
pXref = (const CXref*)pXref->m_pPrev;
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
void CXref::Add(CObjectBase* pObject)
|
||
{
|
||
if (!pObject)
|
||
return;
|
||
|
||
if (pObject->IsDirect() || pObject->IsIndirect())
|
||
return;
|
||
|
||
if (m_arrEntries.size() >= LIMIT_MAX_XREF_ELEMENT)
|
||
{
|
||
RELEASE_OBJECT(pObject);
|
||
return;
|
||
}
|
||
|
||
|
||
// В случае ошибки r объектe нужно применить dispose
|
||
TXrefEntry* pEntry = new TXrefEntry;
|
||
if (NULL == pEntry)
|
||
{
|
||
RELEASE_OBJECT(pObject);
|
||
return;
|
||
}
|
||
|
||
m_arrEntries.push_back(pEntry);
|
||
|
||
pEntry->nEntryType = IN_USE_ENTRY;
|
||
pEntry->unByteOffset = 0;
|
||
pEntry->unGenNo = 0;
|
||
pEntry->pObject = pObject;
|
||
pObject->SetRef(m_unStartOffset + m_arrEntries.size() - 1, pEntry->unGenNo);
|
||
pObject->SetIndirect();
|
||
}
|
||
void CXref::WriteTrailer(CStream* pStream)
|
||
{
|
||
unsigned int unMaxObjId = m_arrEntries.size() + m_unStartOffset;
|
||
|
||
m_pTrailer->Add("Size", unMaxObjId);
|
||
if (m_pPrev)
|
||
m_pTrailer->Add("Prev", m_pPrev->m_unAddr);
|
||
|
||
pStream->WriteStr("trailer\012");
|
||
pStream->Write(m_pTrailer, NULL);
|
||
pStream->WriteStr("\012startxref\012");
|
||
pStream->WriteUInt(m_unAddr);
|
||
pStream->WriteStr("\012%%EOF\012");
|
||
}
|
||
void CXref::WriteToStream(CStream* pStream, CEncrypt* pEncrypt)
|
||
{
|
||
char sBuf[SHORT_BUFFER_SIZE];
|
||
char* pBuf;
|
||
char* pEndPtr = sBuf + SHORT_BUFFER_SIZE - 1;
|
||
|
||
CXref* pXref = this;
|
||
while (pXref)
|
||
{
|
||
unsigned int unStartIndex = (0 == pXref->m_unStartOffset ? 1 : 0);
|
||
for (unsigned int unIndex = unStartIndex, unCount = pXref->m_arrEntries.size(); unIndex < unCount; unIndex++)
|
||
{
|
||
TXrefEntry* pEntry = pXref->m_arrEntries.at(unIndex);
|
||
unsigned int unObjId = pXref->m_unStartOffset + unIndex;
|
||
unsigned int unGenNo = pEntry->unGenNo;
|
||
|
||
pEntry->unByteOffset = pStream->Tell();
|
||
|
||
if (pEncrypt)
|
||
pEncrypt->InitKey(unObjId, unGenNo);
|
||
|
||
pBuf = sBuf;
|
||
pBuf = ItoA(pBuf, unObjId, pEndPtr);
|
||
*pBuf++ = ' ';
|
||
pBuf = ItoA(pBuf, unGenNo, pEndPtr);
|
||
StrCpy(pBuf, " obj\012", pEndPtr);
|
||
|
||
pStream->WriteStr(sBuf);
|
||
pEntry->pObject->WriteValue(pStream, pEncrypt);
|
||
pStream->WriteStr("\012endobj\012");
|
||
}
|
||
pXref = pXref->m_pPrev;
|
||
}
|
||
|
||
// Записываем cross-reference table
|
||
pXref = this;
|
||
while (pXref)
|
||
{
|
||
pXref->m_unAddr = pStream->Tell();
|
||
|
||
pStream->WriteStr("xref\012");
|
||
pStream->WriteInt(pXref->m_unStartOffset);
|
||
pStream->WriteChar(' ');
|
||
pStream->WriteInt(pXref->m_arrEntries.size());
|
||
pStream->WriteChar('\012');
|
||
|
||
for (unsigned int unIndex = 0, unCount = pXref->m_arrEntries.size(); unIndex < unCount; unIndex++)
|
||
{
|
||
TXrefEntry* pEntry = pXref->GetEntry(unIndex);
|
||
|
||
pBuf = sBuf;
|
||
pBuf = ItoA2(pBuf, pEntry->unByteOffset, BYTE_OFFSET_LEN + 1);
|
||
*pBuf++ = ' ';
|
||
pBuf = ItoA2(pBuf, pEntry->unGenNo, GEN_NO_LEN + 1);
|
||
*pBuf++ = ' ';
|
||
*pBuf++ = pEntry->nEntryType;
|
||
StrCpy(pBuf, "\015\012", pEndPtr);
|
||
|
||
pStream->WriteStr(sBuf);
|
||
}
|
||
pXref = pXref->m_pPrev;
|
||
}
|
||
|
||
// Записываем Trailer
|
||
WriteTrailer(pStream);
|
||
}
|
||
bool CXref::IsPDFA() const
|
||
{
|
||
return m_pDocument->IsPDFA();
|
||
}
|
||
}
|