Split fwl/core class pt I.

xfa/fwl/core/ifwl_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_CORE_IFWL_COMBOBOX_H_
 #define XFA_FWL_CORE_IFWL_COMBOBOX_H_
 
 #include "xfa/fwl/core/ifwl_comboboxproxy.h"
@@ skipping 27 matching lines @@
 #define FWL_STYLEEXT_CMB_EditVAlignMask (3L << 6)
 #define FWL_STYLEEXT_CMB_EditHAlignModeMask (3L << 8)
 #define FWL_STYLEEXT_CMB_ListItemLeftAlign (0L << 10)
 #define FWL_STYLEEXT_CMB_ListItemCenterAlign (1L << 10)
 #define FWL_STYLEEXT_CMB_ListItemRightAlign (2L << 10)
 #define FWL_STYLEEXT_CMB_ListItemAlignMask (3L << 10)
 #define FWL_STYLEEXT_CMB_ListItemText (0L << 12)
 #define FWL_STYLEEXT_CMB_ListItemIconText (1L << 12)
 #define FWL_STYLEEXT_CMB_ReadOnly (1L << 13)
 
-class IFWL_ComboBoxDP : public IFWL_ListBoxDP {
- public:
-  virtual FX_FLOAT GetListHeight(IFWL_Widget* pWidget) = 0;
-};
-
 class IFWL_ComboBox : public IFWL_Widget {
  public:
+  class DataProvider : public IFWL_ListBox::DataProvider {
+   public:
+    virtual FX_FLOAT GetListHeight(IFWL_Widget* pWidget) = 0;
+  };
+
   explicit IFWL_ComboBox(const IFWL_App* app,
                          std::unique_ptr<CFWL_WidgetProperties> properties);
   ~IFWL_ComboBox() override;
 
   // IFWL_Widget
   FWL_Type GetClassID() const override;
   void GetWidgetRect(CFX_RectF& rect, bool bAutoSize = false) override;
   void ModifyStylesEx(uint32_t dwStylesExAdded,
                       uint32_t dwStylesExRemoved) override;
   void SetStates(uint32_t dwStates, bool bSet = true) override;
@@ skipping 101 matching lines @@
   IFWL_ComboBoxProxy* m_pComboBoxProxy;  // Can this be a unique_ptr?
   bool m_bLButtonDown;
   bool m_bUpFormHandler;
   int32_t m_iCurSel;
   int32_t m_iBtnState;
   FX_FLOAT m_fComboFormHandler;
   FX_FLOAT m_fItemHeight;
 };
 
 #endif  // XFA_FWL_CORE_IFWL_COMBOBOX_H_