Merge to XFA: Add type cast definitions for CPDF_Array.

core/src/fpdfapi/fpdf_edit/fpdf_edit_content.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "../../../include/fpdfapi/fpdf_page.h"
 #include "../../../include/fpdfapi/fpdf_serial.h"
 #include "../../../include/fpdfapi/fpdf_module.h"
 #include "../fpdf_page/pageint.h"
@@ skipping 102 matching lines @@
   matrix.TransformRect(bbox);
   pFormDict->SetAtRect("BBox", bbox);
   pStream->InitStream((uint8_t*)data, size, pFormDict);
   buf << "q " << matrix << " cm ";
   CFX_ByteString name = RealizeResource(pStream, "XObject");
   buf << "/" << PDF_NameEncode(name) << " Do Q\n";
 }
 void CPDF_PageContentGenerate::TransformContent(CFX_Matrix& matrix) {
   CPDF_Dictionary* pDict = m_pPage->m_pFormDict;
   CPDF_Object* pContent = pDict ? pDict->GetElementValue("Contents") : NULL;
-  if (!pContent) {
+  if (!pContent)
     return;
-  }
+
   CFX_ByteTextBuf buf;
-  int type = pContent->GetType();
-  if (type == PDFOBJ_ARRAY) {
-    CPDF_Array* pArray = (CPDF_Array*)pContent;
+  if (CPDF_Array* pArray = pContent->AsArray()) {
     int iCount = pArray->GetCount();
     CPDF_StreamAcc** pContentArray = FX_Alloc(CPDF_StreamAcc*, iCount);
     int size = 0;
     int i = 0;
     for (i = 0; i < iCount; ++i) {
       pContent = pArray->GetElement(i);
       if (!pContent || pContent->GetType() != PDFOBJ_STREAM) {
         continue;
       }
       CPDF_StreamAcc* pStream = new CPDF_StreamAcc();
       pStream->LoadAllData((CPDF_Stream*)pContent);
       pContentArray[i] = pStream;
       size += pContentArray[i]->GetSize() + 1;
     }
     int pos = 0;
     uint8_t* pBuf = FX_Alloc(uint8_t, size);
     for (i = 0; i < iCount; ++i) {
       FXSYS_memcpy(pBuf + pos, pContentArray[i]->GetData(),
                    pContentArray[i]->GetSize());
       pos += pContentArray[i]->GetSize() + 1;
       pBuf[pos - 1] = ' ';
       delete pContentArray[i];
     }
     ProcessForm(buf, pBuf, size, matrix);
     FX_Free(pBuf);
     FX_Free(pContentArray);
-  } else if (type == PDFOBJ_STREAM) {
+  } else if (pContent->GetType() == PDFOBJ_STREAM) {
     CPDF_StreamAcc contentStream;
     contentStream.LoadAllData((CPDF_Stream*)pContent);
     ProcessForm(buf, contentStream.GetData(), contentStream.GetSize(), matrix);
   }
   CPDF_Stream* pStream = new CPDF_Stream(NULL, 0, NULL);
   pStream->SetData(buf.GetBuffer(), buf.GetLength(), FALSE, FALSE);
   m_pDocument->AddIndirectObject(pStream);
   m_pPage->m_pFormDict->SetAtReference("Contents", m_pDocument,
                                        pStream->GetObjNum());
 }