Convert FWL_ERR into an enum class.

xfa/fwl/lightwidget/cfwl_combobox.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 XFA_FWL_LIGHTWIDGET_CFWL_COMBOBOX_H_
 #define XFA_FWL_LIGHTWIDGET_CFWL_COMBOBOX_H_
 
 #include <memory>
 #include <vector>
 
 #include "xfa/fwl/basewidget/ifwl_combobox.h"
 #include "xfa/fwl/lightwidget/cfwl_widget.h"
 
 class CFWL_WidgetProperties;
 class IFWL_ComboBoxDP;
 class CFWL_ComboBoxDP;
 class CFWL_ComboBoxItem;
 
 class CFWL_ComboBox : public CFWL_Widget {
  public:
   static CFWL_ComboBox* Create();
-  FWL_ERR Initialize(const CFWL_WidgetProperties* pProperties = NULL);
+  FWL_Error Initialize(const CFWL_WidgetProperties* pProperties = NULL);
   int32_t AddString(const CFX_WideStringC& wsText);
   int32_t AddString(const CFX_WideStringC& wsText, CFX_DIBitmap* pIcon);
   bool RemoveAt(int32_t iIndex);  // Returns false iff |iIndex| out of range.
   void RemoveAll();
   int32_t CountItems();
-  FWL_ERR GetTextByIndex(int32_t iIndex, CFX_WideString& wsText);
+  FWL_Error GetTextByIndex(int32_t iIndex, CFX_WideString& wsText);
   int32_t GetCurSel();
-  FWL_ERR SetCurSel(int32_t iSel);
-  FWL_ERR SetEditText(const CFX_WideString& wsText);
+  FWL_Error SetCurSel(int32_t iSel);
+  FWL_Error SetEditText(const CFX_WideString& wsText);
   int32_t GetEditTextLength() const;
-  FWL_ERR GetEditText(CFX_WideString& wsText,
-                      int32_t nStart = 0,
-                      int32_t nCount = -1) const;
-  FWL_ERR SetEditSelRange(int32_t nStart, int32_t nCount = -1);
+  FWL_Error GetEditText(CFX_WideString& wsText,
+                        int32_t nStart = 0,
+                        int32_t nCount = -1) const;
+  FWL_Error SetEditSelRange(int32_t nStart, int32_t nCount = -1);
   int32_t GetEditSelRange(int32_t nIndex, int32_t& nStart);
   int32_t GetEditLimit();
-  FWL_ERR SetEditLimit(int32_t nLimit);
-  FWL_ERR EditDoClipboard(int32_t iCmd);
+  FWL_Error SetEditLimit(int32_t nLimit);
+  FWL_Error EditDoClipboard(int32_t iCmd);
   FX_BOOL EditRedo(const CFX_ByteStringC& bsRecord);
   FX_BOOL EditUndo(const CFX_ByteStringC& bsRecord);
-  FWL_ERR SetMaxListHeight(FX_FLOAT fMaxHeight);
-  FWL_ERR SetItemData(int32_t iIndex, void* pData);
+  FWL_Error SetMaxListHeight(FX_FLOAT fMaxHeight);
+  FWL_Error SetItemData(int32_t iIndex, void* pData);
   void* GetItemData(int32_t iIndex);
-  FWL_ERR SetListTheme(IFWL_ThemeProvider* pTheme);
+  FWL_Error SetListTheme(IFWL_ThemeProvider* pTheme);
   FX_BOOL AfterFocusShowDropList();
-  FWL_ERR OpenDropDownList(FX_BOOL bActivate);
+  FWL_Error OpenDropDownList(FX_BOOL bActivate);
 
   FX_BOOL EditCanUndo();
   FX_BOOL EditCanRedo();
   FX_BOOL EditUndo();
   FX_BOOL EditRedo();
   FX_BOOL EditCanCopy();
   FX_BOOL EditCanCut();
   FX_BOOL EditCanSelectAll();
   FX_BOOL EditCopy(CFX_WideString& wsCopy);
   FX_BOOL EditCut(CFX_WideString& wsCut);
   FX_BOOL EditPaste(const CFX_WideString& wsPaste);
   FX_BOOL EditSelectAll();
   FX_BOOL EditDelete();
   FX_BOOL EditDeSelect();
-  FWL_ERR GetBBox(CFX_RectF& rect);
-  FWL_ERR EditModifyStylesEx(uint32_t dwStylesExAdded,
-                             uint32_t dwStylesExRemoved);
+  FWL_Error GetBBox(CFX_RectF& rect);
+  FWL_Error EditModifyStylesEx(uint32_t dwStylesExAdded,
+                               uint32_t dwStylesExRemoved);
   CFWL_ComboBox();
   virtual ~CFWL_ComboBox();
 
  protected:
   class CFWL_ComboBoxDP : public IFWL_ComboBoxDP {
    public:
     CFWL_ComboBoxDP();
     ~CFWL_ComboBoxDP();
-    virtual FWL_ERR GetCaption(IFWL_Widget* pWidget,
-                               CFX_WideString& wsCaption) {
-      return FWL_ERR_Succeeded;
+    virtual FWL_Error GetCaption(IFWL_Widget* pWidget,
+                                 CFX_WideString& wsCaption) {
+      return FWL_Error::Succeeded;
     }
 
     virtual int32_t CountItems(IFWL_Widget* pWidget);
     virtual FWL_HLISTITEM GetItem(IFWL_Widget* pWidget, int32_t nIndex);
     virtual int32_t GetItemIndex(IFWL_Widget* pWidget, FWL_HLISTITEM hItem);
     virtual FX_BOOL SetItemIndex(IFWL_Widget* pWidget,
                                  FWL_HLISTITEM hItem,
                                  int32_t nIndex);
 
     virtual uint32_t GetItemStyles(IFWL_Widget* pWidget, FWL_HLISTITEM hItem);
-    virtual FWL_ERR GetItemText(IFWL_Widget* pWidget,
-                                FWL_HLISTITEM hItem,
-                                CFX_WideString& wsText);
-    virtual FWL_ERR GetItemRect(IFWL_Widget* pWidget,
-                                FWL_HLISTITEM hItem,
-                                CFX_RectF& rtItem);
+    virtual FWL_Error GetItemText(IFWL_Widget* pWidget,
+                                  FWL_HLISTITEM hItem,
+                                  CFX_WideString& wsText);
+    virtual FWL_Error GetItemRect(IFWL_Widget* pWidget,
+                                  FWL_HLISTITEM hItem,
+                                  CFX_RectF& rtItem);
     virtual void* GetItemData(IFWL_Widget* pWidget, FWL_HLISTITEM hItem);
-    virtual FWL_ERR SetItemStyles(IFWL_Widget* pWidget,
+    virtual FWL_Error SetItemStyles(IFWL_Widget* pWidget,
+                                    FWL_HLISTITEM hItem,
+                                    uint32_t dwStyle);
+    virtual FWL_Error SetItemText(IFWL_Widget* pWidget,
                                   FWL_HLISTITEM hItem,
-                                  uint32_t dwStyle);
-    virtual FWL_ERR SetItemText(IFWL_Widget* pWidget,
-                                FWL_HLISTITEM hItem,
-                                const FX_WCHAR* pszText);
-    virtual FWL_ERR SetItemRect(IFWL_Widget* pWidget,
-                                FWL_HLISTITEM hItem,
-                                const CFX_RectF& rtItem);
+                                  const FX_WCHAR* pszText);
+    virtual FWL_Error SetItemRect(IFWL_Widget* pWidget,
+                                  FWL_HLISTITEM hItem,
+                                  const CFX_RectF& rtItem);
     virtual FX_FLOAT GetItemHeight(IFWL_Widget* pWidget);
     virtual CFX_DIBitmap* GetItemIcon(IFWL_Widget* pWidget,
                                       FWL_HLISTITEM hItem);
-    virtual FWL_ERR GetItemCheckRect(IFWL_Widget* pWidget,
-                                     FWL_HLISTITEM hItem,
-                                     CFX_RectF& rtCheck);
-    virtual FWL_ERR SetItemCheckRect(IFWL_Widget* pWidget,
-                                     FWL_HLISTITEM hItem,
-                                     const CFX_RectF& rtCheck);
+    virtual FWL_Error GetItemCheckRect(IFWL_Widget* pWidget,
+                                       FWL_HLISTITEM hItem,
+                                       CFX_RectF& rtCheck);
+    virtual FWL_Error SetItemCheckRect(IFWL_Widget* pWidget,
+                                       FWL_HLISTITEM hItem,
+                                       const CFX_RectF& rtCheck);
     virtual uint32_t GetItemCheckState(IFWL_Widget* pWidget,
                                        FWL_HLISTITEM hItem);
-    virtual FWL_ERR SetItemCheckState(IFWL_Widget* pWidget,
-                                      FWL_HLISTITEM hItem,
-                                      uint32_t dwCheckState);
+    virtual FWL_Error SetItemCheckState(IFWL_Widget* pWidget,
+                                        FWL_HLISTITEM hItem,
+                                        uint32_t dwCheckState);
     virtual FX_FLOAT GetListHeight(IFWL_Widget* pWidget);
 
     std::vector<std::unique_ptr<CFWL_ComboBoxItem>> m_ItemArray;
     FX_FLOAT m_fMaxListHeight;
     FX_FLOAT m_fItemHeight;
   };
   CFWL_ComboBoxDP m_comboBoxData;
 };
 
 class CFWL_ComboBoxItem {
  public:
   CFWL_ComboBoxItem() {
     m_pDIB = NULL;
     m_pData = NULL;
   }
   CFX_RectF m_rtItem;
   uint32_t m_dwStyles;
   CFX_WideString m_wsText;
   CFX_DIBitmap* m_pDIB;
   uint32_t m_dwCheckState;
   CFX_RectF m_rtCheckBox;
   void* m_pData;
 };
 
 #endif  // XFA_FWL_LIGHTWIDGET_CFWL_COMBOBOX_H_