Convert XFA_ELEMENT to an enum class

xfa/fxfa/parser/cxfa_event.cpp

 // Copyright 2016 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 "xfa/fxfa/parser/cxfa_event.h"
 
 #include "xfa/fxfa/parser/xfa_object.h"
 
 CXFA_Event::CXFA_Event(CXFA_Node* pNode) : CXFA_Data(pNode) {}
 
 int32_t CXFA_Event::GetActivity() {
   return m_pNode->GetEnum(XFA_ATTRIBUTE_Activity);
 }
 
-int32_t CXFA_Event::GetEventType() {
+XFA_Element CXFA_Event::GetEventType() {
   CXFA_Node* pChild = m_pNode->GetNodeItem(XFA_NODEITEM_FirstChild);
   while (pChild) {
-    int32_t eType = pChild->GetClassID();
-    if (eType != XFA_ELEMENT_Extras)
+    XFA_Element eType = pChild->GetClassID();
+    if (eType != XFA_Element::Extras)
       return eType;
 
     pChild = pChild->GetNodeItem(XFA_NODEITEM_NextSibling);
   }
-  return XFA_ELEMENT_UNKNOWN;
+  return XFA_Element::Unknown;
 }
 
 void CXFA_Event::GetRef(CFX_WideStringC& wsRef) {
   m_pNode->TryCData(XFA_ATTRIBUTE_Ref, wsRef);
 }
 
 CXFA_Script CXFA_Event::GetScript() {
-  return CXFA_Script(m_pNode->GetChild(0, XFA_ELEMENT_Script));
+  return CXFA_Script(m_pNode->GetChild(0, XFA_Element::Script));
 }
 
 CXFA_Submit CXFA_Event::GetSubmit() {
-  return CXFA_Submit(m_pNode->GetChild(0, XFA_ELEMENT_Submit));
+  return CXFA_Submit(m_pNode->GetChild(0, XFA_Element::Submit));
 }
 
 void CXFA_Event::GetSignDataTarget(CFX_WideString& wsTarget) {
-  CXFA_Node* pNode = m_pNode->GetProperty(0, XFA_ELEMENT_SignData);
+  CXFA_Node* pNode = m_pNode->GetProperty(0, XFA_Element::SignData);
   if (!pNode)
     return;
 
   CFX_WideStringC wsCData;
   pNode->TryCData(XFA_ATTRIBUTE_Target, wsCData);
   wsTarget = wsCData;
 }