Convert FWL_SCBCODE to an enum class

xfa/fwl/core/ifwl_edit.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 "xfa/fwl/core/ifwl_edit.h"
 
 #include <algorithm>
 #include <memory>
@@ skipping 1910 matching lines @@
       }
       iError = m_pEdtEngine->Insert(nCaret, &c, 1);
       break;
     }
   }
   if (iError < 0)
     ProcessInsertError(iError);
 }
 
 bool IFWL_Edit::OnScroll(IFWL_ScrollBar* pScrollBar,
-                         uint32_t dwCode,
+                         FWL_SCBCODE dwCode,
                          FX_FLOAT fPos) {
   CFX_SizeF fs;
   pScrollBar->GetRange(&fs.x, &fs.y);
   FX_FLOAT iCurPos = pScrollBar->GetPos();
   FX_FLOAT fStep = pScrollBar->GetStepSize();
   switch (dwCode) {
-    case FWL_SCBCODE_Min: {
+    case FWL_SCBCODE::Min: {
       fPos = fs.x;
       break;
     }
-    case FWL_SCBCODE_Max: {
+    case FWL_SCBCODE::Max: {
       fPos = fs.y;
       break;
     }
-    case FWL_SCBCODE_StepBackward: {
+    case FWL_SCBCODE::StepBackward: {
       fPos -= fStep;
       if (fPos < fs.x + fStep / 2) {
         fPos = fs.x;
       }
       break;
     }
-    case FWL_SCBCODE_StepForward: {
+    case FWL_SCBCODE::StepForward: {
       fPos += fStep;
       if (fPos > fs.y - fStep / 2) {
         fPos = fs.y;
       }
       break;
     }
-    case FWL_SCBCODE_PageBackward: {
+    case FWL_SCBCODE::PageBackward: {
       fPos -= pScrollBar->GetPageSize();
       if (fPos < fs.x) {
         fPos = fs.x;
       }
       break;
     }
-    case FWL_SCBCODE_PageForward: {
+    case FWL_SCBCODE::PageForward: {
       fPos += pScrollBar->GetPageSize();
       if (fPos > fs.y) {
         fPos = fs.y;
       }
       break;
     }
-    case FWL_SCBCODE_Pos:
-    case FWL_SCBCODE_TrackPos:
+    case FWL_SCBCODE::Pos:
+    case FWL_SCBCODE::TrackPos:
+    case FWL_SCBCODE::None:
       break;
-    case FWL_SCBCODE_EndScroll:
+    case FWL_SCBCODE::EndScroll:
       return false;
-    default:
-      break;
   }
   if (iCurPos != fPos) {
     pScrollBar->SetPos(fPos);
     pScrollBar->SetTrackPos(fPos);
     UpdateOffset(pScrollBar, fPos - iCurPos);
     if (m_pEdtEngine) {
       UpdateCaret();
     }
     CFX_RectF rect;
     GetWidgetRect(rect);
     CFX_RectF rtInvalidate;
     rtInvalidate.Set(0, 0, rect.width + 2, rect.height + 2);
     Repaint(&rtInvalidate);
   }
   return true;
 }