fpdfsdk/ differences with XFA (for didactic purposes only).

fpdfsdk/src/fpdftext.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 "public/fpdf_text.h"
 
+#ifdef PDF_ENABLE_XFA
+#include "../include/fpdfxfa/fpdfxfa_doc.h"
+#include "../include/fpdfxfa/fpdfxfa_page.h"
+#endif
 #include "core/include/fpdfdoc/fpdf_doc.h"
 #include "core/include/fpdftext/fpdf_text.h"
 #include "fpdfsdk/include/fsdk_define.h"
 
 #ifdef _WIN32
 #include <tchar.h>
 #endif
 
 DLLEXPORT FPDF_TEXTPAGE STDCALL FPDFText_LoadPage(FPDF_PAGE page) {
   CPDF_Page* pPDFPage = CPDFPageFromFPDFPage(page);
   if (!pPDFPage)
     return nullptr;
+#ifndef PDF_ENABLE_XFA
   CPDF_ViewerPreferences viewRef(pPDFPage->m_pDocument);
+#else
+  CPDFXFA_Page* pPage = (CPDFXFA_Page*)page;
+  CPDFXFA_Document* pDoc = pPage->GetDocument();
+  CPDF_ViewerPreferences viewRef(pDoc->GetPDFDoc());
+#endif
   IPDF_TextPage* textpage =
       IPDF_TextPage::CreateTextPage(pPDFPage, viewRef.IsDirectionR2L());
   textpage->ParseTextPage();
   return textpage;
 }
 DLLEXPORT void STDCALL FPDFText_ClosePage(FPDF_TEXTPAGE text_page) {
   delete (IPDF_TextPage*)text_page;
 }
 DLLEXPORT int STDCALL FPDFText_CountChars(FPDF_TEXTPAGE text_page) {
   if (!text_page)
@@ skipping 245 matching lines @@
     CFX_FloatRect rect = rectArray.GetAt(rect_index);
     *left = rect.left;
     *right = rect.right;
     *top = rect.top;
     *bottom = rect.bottom;
   }
 }
 DLLEXPORT void STDCALL FPDFLink_CloseWebLinks(FPDF_PAGELINK link_page) {
   delete (IPDF_LinkExtract*)link_page;
 }