Trigger page view event when re-layout is finished

fpdfsdk/include/fpdfxfa/fpdfxfa_doc.h

 // 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
 
 #ifndef FPDFSDK_INCLUDE_FPDFXFA_FPDFXFA_DOC_H_
 #define FPDFSDK_INCLUDE_FPDFXFA_FPDFXFA_DOC_H_
 
 #include <vector>
@@ skipping 190 matching lines @@
                       CFX_WideString& csSubject,
                       CFX_WideString& csMsg);
   FX_BOOL _ExportSubmitFile(FPDF_FILEHANDLER* ppFileHandler,
                             int fileType,
                             FPDF_DWORD encodeType,
                             FPDF_DWORD flag = 0x01111111);
   void _ToXFAContentFlags(CFX_WideString csSrcContent, FPDF_DWORD& flag);
   void _ClearChangeMark();
 
  private:
+  enum LoadStatus {
+    FXFA_LOADSTATUS_PRELOAD = 0,
+    FXFA_LOADSTATUS_LOADING,
+    FXFA_LOADSTATUS_LOADED,
+    FXFA_LOADSTATUS_CLOSING,
+    FXFA_LOADSTATUS_CLOSED
+  };
   void CloseXFADoc(IXFA_DocHandler* pDoc) {
     if (pDoc) {
       pDoc->CloseDoc(m_pXFADoc);
       pDoc->ReleaseDoc(m_pXFADoc);
       m_pXFADoc = NULL;
       m_pXFADocView = NULL;
     }
   }
 
   int m_iDocType;
   CPDF_Document* m_pPDFDoc;
   CPDFSDK_Document* m_pSDKDoc;
   IXFA_Doc* m_pXFADoc;
   IXFA_DocView* m_pXFADocView;
   CPDFXFA_App* m_pApp;
   IJS_Context* m_pJSContext;
   CFX_ArrayTemplate<CPDFXFA_Page*> m_XFAPageList;
+  LoadStatus m_nLoadStatus;
+  int m_nPageCount;
 };
 
 #endif  // FPDFSDK_INCLUDE_FPDFXFA_FPDFXFA_DOC_H_