Merge the CFWL_*Imp classes into the IFWL_* classes.

xfa/fwl/core/ifwl_listbox.h

Index: xfa/fwl/core/ifwl_listbox.h
diff --git a/xfa/fwl/core/ifwl_listbox.h b/xfa/fwl/core/ifwl_listbox.h
new file mode 100644
index 0000000000000000000000000000000000000000..79fb2e94cc52eeb97e29bd2b7ecb402fe3d42ed6
--- /dev/null
+++ b/xfa/fwl/core/ifwl_listbox.h
@@ -0,0 +1,210 @@
+// 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_CORE_IFWL_LISTBOX_H_
+#define XFA_FWL_CORE_IFWL_LISTBOX_H_
+
+#include <memory>
+
+#include "xfa/fwl/core/cfwl_event.h"
+#include "xfa/fwl/core/cfwl_widgetimpproperties.h"
+#include "xfa/fwl/core/ifwl_dataprovider.h"
+#include "xfa/fwl/core/ifwl_edit.h"
+#include "xfa/fwl/core/ifwl_listbox.h"
+#include "xfa/fwl/core/ifwl_widget.h"
+
+#define FWL_CLASS_ListBox L"FWL_LISTBOX"
+#define FWL_STYLEEXT_LTB_MultiSelection (1L << 0)
+#define FWL_STYLEEXT_LTB_ShowScrollBarAlaways (1L << 2)
+#define FWL_STYLEEXT_LTB_MultiColumn (1L << 3)
+#define FWL_STYLEEXT_LTB_LeftAlign (0L << 4)
+#define FWL_STYLEEXT_LTB_CenterAlign (1L << 4)
+#define FWL_STYLEEXT_LTB_RightAlign (2L << 4)
+#define FWL_STYLEEXT_LTB_MultiLine (1L << 6)
+#define FWL_STYLEEXT_LTB_OwnerDraw (1L << 7)
+#define FWL_STYLEEXT_LTB_Icon (1L << 8)
+#define FWL_STYLEEXT_LTB_Check (1L << 9)
+#define FWL_STYLEEXT_LTB_AlignMask (3L << 4)
+#define FWL_STYLEEXT_LTB_ShowScrollBarFocus (1L << 10)
+#define FWL_ITEMSTATE_LTB_Selected (1L << 0)
+#define FWL_ITEMSTATE_LTB_Focused (1L << 1)
+#define FWL_ITEMSTATE_LTB_Checked (1L << 2)
+
+class CFWL_ListBoxImpDelegate;
+class CFWL_MsgKillFocus;
+class CFWL_MsgMouse;
+class CFWL_MsgMouseWheel;
+class CFX_DIBitmap;
+
+FWL_EVENT_DEF(CFWL_EvtLtbSelChanged,
+              CFWL_EventType::SelectChanged,
+              CFX_Int32Array iarraySels;)
+
+FWL_EVENT_DEF(CFWL_EvtLtbDrawItem,
+              CFWL_EventType::DrawItem,
+              CFX_Graphics* m_pGraphics;
+              CFX_Matrix m_matrix;
+              int32_t m_index;
+              CFX_RectF m_rect;)
+
+class IFWL_ListItem {};
+
+class IFWL_ListBoxDP : public IFWL_DataProvider {
+ public:
+  virtual int32_t CountItems(const IFWL_Widget* pWidget) = 0;
+  virtual IFWL_ListItem* GetItem(const IFWL_Widget* pWidget,
+                                 int32_t nIndex) = 0;
+  virtual int32_t GetItemIndex(IFWL_Widget* pWidget, IFWL_ListItem* pItem) = 0;
+  virtual FX_BOOL SetItemIndex(IFWL_Widget* pWidget,
+                               IFWL_ListItem* pItem,
+                               int32_t nIndex) = 0;
+  virtual uint32_t GetItemStyles(IFWL_Widget* pWidget,
+                                 IFWL_ListItem* pItem) = 0;
+  virtual FWL_Error GetItemText(IFWL_Widget* pWidget,
+                                IFWL_ListItem* pItem,
+                                CFX_WideString& wsText) = 0;
+  virtual FWL_Error GetItemRect(IFWL_Widget* pWidget,
+                                IFWL_ListItem* pItem,
+                                CFX_RectF& rtItem) = 0;
+  virtual void* GetItemData(IFWL_Widget* pWidget, IFWL_ListItem* pItem) = 0;
+  virtual FWL_Error SetItemStyles(IFWL_Widget* pWidget,
+                                  IFWL_ListItem* pItem,
+                                  uint32_t dwStyle) = 0;
+  virtual FWL_Error SetItemText(IFWL_Widget* pWidget,
+                                IFWL_ListItem* pItem,
+                                const FX_WCHAR* pszText) = 0;
+  virtual FWL_Error SetItemRect(IFWL_Widget* pWidget,
+                                IFWL_ListItem* pItem,
+                                const CFX_RectF& rtItem) = 0;
+  virtual FX_FLOAT GetItemHeight(IFWL_Widget* pWidget) = 0;
+  virtual CFX_DIBitmap* GetItemIcon(IFWL_Widget* pWidget,
+                                    IFWL_ListItem* pItem) = 0;
+  virtual FWL_Error GetItemCheckRect(IFWL_Widget* pWidget,
+                                     IFWL_ListItem* pItem,
+                                     CFX_RectF& rtCheck) = 0;
+  virtual FWL_Error SetItemCheckRect(IFWL_Widget* pWidget,
+                                     IFWL_ListItem* pItem,
+                                     const CFX_RectF& rtCheck) = 0;
+  virtual uint32_t GetItemCheckState(IFWL_Widget* pWidget,
+                                     IFWL_ListItem* pItem) = 0;
+  virtual FWL_Error SetItemCheckState(IFWL_Widget* pWidget,
+                                      IFWL_ListItem* pItem,
+                                      uint32_t dwCheckState) = 0;
+};
+
+class IFWL_ListBoxCompare {
+ public:
+  virtual ~IFWL_ListBoxCompare() {}
+  virtual int32_t Compare(IFWL_ListItem* hLeft, IFWL_ListItem* hRight) = 0;
+};
+
+class IFWL_ListBox : public IFWL_Widget {
+ public:
+  static IFWL_ListBox* Create(const CFWL_WidgetImpProperties& properties,
+                              IFWL_Widget* pOuter);
+
+  IFWL_ListBox(const CFWL_WidgetImpProperties& properties, IFWL_Widget* pOuter);
+  ~IFWL_ListBox() override;
+
+  // IFWL_Widget
+  FWL_Error GetClassName(CFX_WideString& wsClass) const override;
+  FWL_Type GetClassID() const override;
+  FWL_Error Initialize() override;
+  FWL_Error Finalize() override;
+  FWL_Error GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE) override;
+  FWL_Error Update() override;
+  FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy) override;
+  FWL_Error DrawWidget(CFX_Graphics* pGraphics,
+                       const CFX_Matrix* pMatrix = nullptr) override;
+  FWL_Error SetThemeProvider(IFWL_ThemeProvider* pThemeProvider) override;
+
+  int32_t CountSelItems();
+  IFWL_ListItem* GetSelItem(int32_t nIndexSel);
+  int32_t GetSelIndex(int32_t nIndex);
+  FWL_Error SetSelItem(IFWL_ListItem* hItem, FX_BOOL bSelect = TRUE);
+  FWL_Error GetItemText(IFWL_ListItem* hItem, CFX_WideString& wsText);
+  FWL_Error GetScrollPos(FX_FLOAT& fPos, FX_BOOL bVert = TRUE);
+  FWL_Error* Sort(IFWL_ListBoxCompare* pCom);
+
+ protected:
+  friend class CFWL_ListBoxImpDelegate;
+
+  IFWL_ListItem* GetItem(IFWL_ListItem* hItem, uint32_t dwKeyCode);
+  void SetSelection(IFWL_ListItem* hStart,
+                    IFWL_ListItem* hEnd,
+                    FX_BOOL bSelected);
+  void SetSelectionDirect(IFWL_ListItem* hItem, FX_BOOL bSelect);
+  FX_BOOL IsItemSelected(IFWL_ListItem* hItem);
+  void ClearSelection();
+  void SelectAll();
+  IFWL_ListItem* GetFocusedItem();
+  void SetFocusItem(IFWL_ListItem* hItem);
+  IFWL_ListItem* GetItemAtPoint(FX_FLOAT fx, FX_FLOAT fy);
+  FX_BOOL GetItemCheckRect(IFWL_ListItem* hItem, CFX_RectF& rtCheck);
+  FX_BOOL SetItemChecked(IFWL_ListItem* hItem, FX_BOOL bChecked);
+  FX_BOOL GetItemChecked(IFWL_ListItem* hItem);
+  FX_BOOL ScrollToVisible(IFWL_ListItem* hItem);
+  void DrawBkground(CFX_Graphics* pGraphics,
+                    IFWL_ThemeProvider* pTheme,
+                    const CFX_Matrix* pMatrix = nullptr);
+  void DrawItems(CFX_Graphics* pGraphics,
+                 IFWL_ThemeProvider* pTheme,
+                 const CFX_Matrix* pMatrix = nullptr);
+  void DrawItem(CFX_Graphics* pGraphics,
+                IFWL_ThemeProvider* pTheme,
+                IFWL_ListItem* hItem,
+                int32_t Index,
+                const CFX_RectF& rtItem,
+                const CFX_Matrix* pMatrix = nullptr);
+  void DrawStatic(CFX_Graphics* pGraphics, IFWL_ThemeProvider* pTheme);
+  CFX_SizeF CalcSize(FX_BOOL bAutoSize = FALSE);
+  void GetItemSize(CFX_SizeF& size,
+                   IFWL_ListItem* hItem,
+                   FX_FLOAT fWidth,
+                   FX_FLOAT fHeight,
+                   FX_BOOL bAutoSize = FALSE);
+  FX_FLOAT GetMaxTextWidth();
+  FX_FLOAT GetScrollWidth();
+  FX_FLOAT GetItemHeigt();
+  void InitScrollBar(FX_BOOL bVert = TRUE);
+  FX_BOOL IsShowScrollBar(FX_BOOL bVert);
+  void ProcessSelChanged();
+
+  CFX_RectF m_rtClient;
+  CFX_RectF m_rtStatic;
+  CFX_RectF m_rtConent;
+  std::unique_ptr<IFWL_ScrollBar> m_pHorzScrollBar;
+  std::unique_ptr<IFWL_ScrollBar> m_pVertScrollBar;
+  uint32_t m_dwTTOStyles;
+  int32_t m_iTTOAligns;
+  IFWL_ListItem* m_hAnchor;
+  FX_FLOAT m_fItemHeight;
+  FX_FLOAT m_fScorllBarWidth;
+  FX_BOOL m_bLButtonDown;
+  IFWL_ThemeProvider* m_pScrollBarTP;
+};
+
+class CFWL_ListBoxImpDelegate : public CFWL_WidgetImpDelegate {
+ public:
+  CFWL_ListBoxImpDelegate(IFWL_ListBox* pOwner);
+  void OnProcessMessage(CFWL_Message* pMessage) override;
+  void OnProcessEvent(CFWL_Event* pEvent) override;
+  void OnDrawWidget(CFX_Graphics* pGraphics,
+                    const CFX_Matrix* pMatrix = nullptr) override;
+
+ protected:
+  void OnFocusChanged(CFWL_Message* pMsg, FX_BOOL bSet = TRUE);
+  void OnLButtonDown(CFWL_MsgMouse* pMsg);
+  void OnLButtonUp(CFWL_MsgMouse* pMsg);
+  void OnMouseWheel(CFWL_MsgMouseWheel* pMsg);
+  void OnKeyDown(CFWL_MsgKey* pMsg);
+  void OnVK(IFWL_ListItem* hItem, FX_BOOL bShift, FX_BOOL bCtrl);
+  FX_BOOL OnScroll(IFWL_ScrollBar* pScrollBar, uint32_t dwCode, FX_FLOAT fPos);
+  void DispatchSelChangedEv();
+  IFWL_ListBox* m_pOwner;
+};
+
+#endif  // XFA_FWL_CORE_IFWL_LISTBOX_H_