C++ CPDF_Dictionary::RemoveAt方法代码示例

void RemoveInterFormFont(CPDF_Dictionary* pFormDict, const CPDF_Font* pFont) {
  if (!pFormDict || !pFont) {
    return;
  }
  CFX_ByteString csTag;
  if (!FindInterFormFont(pFormDict, pFont, csTag)) {
    return;
  }
  CPDF_Dictionary* pDR = pFormDict->GetDict("DR");
  CPDF_Dictionary* pFonts = pDR->GetDict("Font");
  pFonts->RemoveAt(csTag);
}

void CPDF_PageContentGenerate::GenerateContent() {
    CFX_ByteTextBuf buf;
    CPDF_Dictionary* pPageDict = m_pPage->m_pFormDict;
    for (int i = 0; i < m_pageObjects.GetSize(); ++i) {
        CPDF_PageObject* pPageObj = (CPDF_PageObject*)m_pageObjects[i];
        if (!pPageObj || pPageObj->m_Type != PDFPAGE_IMAGE) {
            continue;
        }
        ProcessImage(buf, (CPDF_ImageObject*)pPageObj);
    }
    CPDF_Object* pContent =
        pPageDict ? pPageDict->GetElementValue("Contents") : NULL;
    if (pContent != NULL) {
        pPageDict->RemoveAt("Contents");
    }
    CPDF_Stream* pStream = new CPDF_Stream(NULL, 0, NULL);
    pStream->SetData(buf.GetBuffer(), buf.GetLength(), FALSE, FALSE);
    m_pDocument->AddIndirectObject(pStream);
    pPageDict->SetAtReference("Contents", m_pDocument, pStream->GetObjNum());
}

FX_BOOL CPDF_PageOrganizer::ExportPage(CPDF_Document* pSrcPDFDoc,
                                       CFX_WordArray* nPageNum,
                                       CPDF_Document* pDestPDFDoc,
                                       int nIndex) {
  int curpage = nIndex;

  nonstd::unique_ptr<ObjectNumberMap> pObjNumberMap(new ObjectNumberMap);

  for (int i = 0; i < nPageNum->GetSize(); ++i) {
    CPDF_Dictionary* pCurPageDict = pDestPDFDoc->CreateNewPage(curpage);
    CPDF_Dictionary* pSrcPageDict = pSrcPDFDoc->GetPage(nPageNum->GetAt(i) - 1);
    if (!pSrcPageDict || !pCurPageDict)
      return FALSE;

    // Clone the page dictionary///////////
    FX_POSITION SrcPos = pSrcPageDict->GetStartPos();
    while (SrcPos) {
      CFX_ByteString cbSrcKeyStr;
      CPDF_Object* pObj = pSrcPageDict->GetNextElement(SrcPos, cbSrcKeyStr);
      if (cbSrcKeyStr.Compare(("Type")) && cbSrcKeyStr.Compare(("Parent"))) {
        if (pCurPageDict->KeyExist(cbSrcKeyStr))
          pCurPageDict->RemoveAt(cbSrcKeyStr);
        pCurPageDict->SetAt(cbSrcKeyStr, pObj->Clone());
      }
    }

    // inheritable item///////////////////////
    CPDF_Object* pInheritable = nullptr;
    // 1 MediaBox  //required
    if (!pCurPageDict->KeyExist("MediaBox")) {
      pInheritable = PageDictGetInheritableTag(pSrcPageDict, "MediaBox");
      if (!pInheritable) {
        // Search the "CropBox" from source page dictionary,
        // if not exists,we take the letter size.
        pInheritable = PageDictGetInheritableTag(pSrcPageDict, "CropBox");
        if (pInheritable) {
          pCurPageDict->SetAt("MediaBox", pInheritable->Clone());
        } else {
          // Make the default size to be letter size (8.5'x11')
          CPDF_Array* pArray = new CPDF_Array;
          pArray->AddNumber(0);
          pArray->AddNumber(0);
          pArray->AddNumber(612);
          pArray->AddNumber(792);
          pCurPageDict->SetAt("MediaBox", pArray);
        }
      } else {
        pCurPageDict->SetAt("MediaBox", pInheritable->Clone());
      }
    }
    // 2 Resources //required
    if (!pCurPageDict->KeyExist("Resources")) {
      pInheritable = PageDictGetInheritableTag(pSrcPageDict, "Resources");
      if (!pInheritable)
        return FALSE;
      pCurPageDict->SetAt("Resources", pInheritable->Clone());
    }
    // 3 CropBox  //Optional
    if (!pCurPageDict->KeyExist("CropBox")) {
      pInheritable = PageDictGetInheritableTag(pSrcPageDict, "CropBox");
      if (pInheritable)
        pCurPageDict->SetAt("CropBox", pInheritable->Clone());
    }
    // 4 Rotate  //Optional
    if (!pCurPageDict->KeyExist("Rotate")) {
      pInheritable = PageDictGetInheritableTag(pSrcPageDict, "Rotate");
      if (pInheritable)
        pCurPageDict->SetAt("Rotate", pInheritable->Clone());
    }

    /////////////////////////////////////////////
    // Update the reference
    FX_DWORD dwOldPageObj = pSrcPageDict->GetObjNum();
    FX_DWORD dwNewPageObj = pCurPageDict->GetObjNum();

    (*pObjNumberMap)[dwOldPageObj] = dwNewPageObj;

    UpdateReference(pCurPageDict, pDestPDFDoc, pObjNumberMap.get());
    ++curpage;
  }

  return TRUE;
}

FX_BOOL CPDF_PageOrganizer::UpdateReference(CPDF_Object* pObj,
                                            CPDF_Document* pDoc,
                                            ObjectNumberMap* pObjNumberMap) {
  switch (pObj->GetType()) {
    case PDFOBJ_REFERENCE: {
      CPDF_Reference* pReference = pObj->AsReference();
      FX_DWORD newobjnum = GetNewObjId(pDoc, pObjNumberMap, pReference);
      if (newobjnum == 0)
        return FALSE;
      pReference->SetRef(pDoc, newobjnum);
      break;
    }
    case PDFOBJ_DICTIONARY: {
      CPDF_Dictionary* pDict = pObj->AsDictionary();

      FX_POSITION pos = pDict->GetStartPos();
      while (pos) {
        CFX_ByteString key("");
        CPDF_Object* pNextObj = pDict->GetNextElement(pos, key);
        if (!FXSYS_strcmp(key, "Parent") || !FXSYS_strcmp(key, "Prev") ||
            !FXSYS_strcmp(key, "First")) {
          continue;
        }
        if (pNextObj) {
          if (!UpdateReference(pNextObj, pDoc, pObjNumberMap))
            pDict->RemoveAt(key);
        } else {
          return FALSE;
        }
      }
      break;
    }
    case PDFOBJ_ARRAY: {
      CPDF_Array* pArray = pObj->AsArray();
      FX_DWORD count = pArray->GetCount();
      for (FX_DWORD i = 0; i < count; ++i) {
        CPDF_Object* pNextObj = pArray->GetElement(i);
        if (!pNextObj)
          return FALSE;
        if (!UpdateReference(pNextObj, pDoc, pObjNumberMap))
          return FALSE;
      }
      break;
    }
    case PDFOBJ_STREAM: {
      CPDF_Stream* pStream = pObj->AsStream();
      CPDF_Dictionary* pDict = pStream->GetDict();
      if (pDict) {
        if (!UpdateReference(pDict, pDoc, pObjNumberMap))
          return FALSE;
      } else {
        return FALSE;
      }
      break;
    }
    default:
      break;
  }

  return TRUE;
}

//.........这里部分代码省略.........
		if (!pAnnotAP)continue;

		CPDF_Stream* pAPStream = pAnnotAP->GetStream("N");
		if (!pAPStream)
		{
			CPDF_Dictionary* pAPDic = pAnnotAP->GetDict("N");
			if (!pAPDic)continue;

			if (!sAnnotState.IsEmpty())
			{
				pAPStream = pAPDic->GetStream(sAnnotState);
			}
			else
			{
				FX_POSITION pos = pAPDic->GetStartPos();
				if (pos)
				{
					CFX_ByteString sKey;
					CPDF_Object* pFirstObj = pAPDic->GetNextElement(pos, sKey);
					if (pFirstObj)
					{
						if (pFirstObj->GetType() == PDFOBJ_REFERENCE)
							pFirstObj = pFirstObj->GetDirect();
						
						if (pFirstObj->GetType() != PDFOBJ_STREAM)
							continue;

						pAPStream = (CPDF_Stream*)pFirstObj;
					}
				}
			}
		}

		if (!pAPStream)continue;

		CPDF_Dictionary* pAPDic = pAPStream->GetDict();
		CFX_AffineMatrix matrix = pAPDic->GetMatrix("Matrix");

		CPDF_Rect rcStream;
		if (pAPDic->KeyExist("Rect"))
			rcStream = pAPDic->GetRect("Rect");
		else if (pAPDic->KeyExist("BBox"))
			rcStream = pAPDic->GetRect("BBox");

		if (rcStream.IsEmpty())continue;

		CPDF_Object* pObj = pAPStream;

		if (pObj)
		{		
			CPDF_Dictionary* pObjDic = pObj->GetDict();
			if (pObjDic)
			{
				pObjDic->SetAtName("Type", "XObject");
				pObjDic->SetAtName("Subtype", "Form");
			}
		}

		CPDF_Dictionary* pXObject = pNewXORes->GetDict("XObject");
		if (!pXObject)
		{
			pXObject = FX_NEW CPDF_Dictionary;
			pNewXORes->SetAt("XObject", pXObject);
		}

		CFX_ByteString sFormName;
		sFormName.Format("F%d", i);
		FX_DWORD dwObjNum = pDocument->AddIndirectObject(pObj);
		pXObject->SetAtReference(sFormName, pDocument, dwObjNum);

		CPDF_StreamAcc acc;
		acc.LoadAllData(pNewXObject);

		FX_LPCBYTE pData = acc.GetData();
		CFX_ByteString sStream(pData, acc.GetSize());
		CFX_ByteString sTemp;

		if (matrix.IsIdentity())
		{
			matrix.a = 1.0f;
			matrix.b = 0.0f;
			matrix.c = 0.0f;
			matrix.d = 1.0f;
			matrix.e = 0.0f;
			matrix.f = 0.0f;
		}

		CFX_AffineMatrix m = GetMatrix(rcAnnot, rcStream, matrix);
		sTemp.Format("q %f 0 0 %f %f %f cm /%s Do Q\n", m.a, m.d, m.e, m.f, sFormName.c_str());
		sStream += sTemp;

		pNewXObject->SetData((FX_LPCBYTE)sStream, sStream.GetLength(), FALSE, FALSE);
	}
	pPageDict->RemoveAt( "Annots" );

	ObjectArray.RemoveAll();
	RectArray.RemoveAll();

	return FLATTEN_SUCCESS;
}