diff --git a/fpdfsdk/include/cpdfsdk_widget.h b/fpdfsdk/include/cpdfsdk_widget.h
new file mode 100644
index 0000000..7f5e345
--- /dev/null
+++ b/fpdfsdk/include/cpdfsdk_widget.h
@@ -0,0 +1,191 @@
+// 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
+
+#ifndef FPDFSDK_INCLUDE_CPDFSDK_WIDGET_H_
+#define FPDFSDK_INCLUDE_CPDFSDK_WIDGET_H_
+
+#include <set>
+
+#include "core/fpdfdoc/include/cpdf_aaction.h"
+#include "core/fpdfdoc/include/cpdf_action.h"
+#include "core/fpdfdoc/include/cpdf_annot.h"
+#include "core/fxcrt/include/fx_coordinates.h"
+#include "core/fxcrt/include/fx_string.h"
+#include "fpdfsdk/include/cpdfsdk_baannot.h"
+#include "fpdfsdk/include/pdfsdk_fieldaction.h"
+#include "fpdfsdk/pdfwindow/PWL_Wnd.h"
+
+class CFX_RenderDevice;
+class CPDF_Annot;
+class CPDF_Dictionary;
+class CPDF_FormControl;
+class CPDF_FormField;
+class CPDF_RenderOptions;
+class CPDF_Stream;
+class CPDFSDK_InterForm;
+class CPDFSDK_PageView;
+
+#ifdef PDF_ENABLE_XFA
+class CXFA_FFWidget;
+class CXFA_FFWidgetHandler;
+#endif  // PDF_ENABLE_XFA
+
+class CPDFSDK_Widget : public CPDFSDK_BAAnnot {
+ public:
+  class Observer {
+   public:
+    explicit Observer(CPDFSDK_Widget** pWatchedPtr);
+    ~Observer();
+
+    void OnWidgetDestroyed();
+
+   private:
+    CPDFSDK_Widget** m_pWatchedPtr;
+  };
+
+#ifdef PDF_ENABLE_XFA
+  CXFA_FFWidget* GetMixXFAWidget() const;
+  CXFA_FFWidget* GetGroupMixXFAWidget();
+  CXFA_FFWidgetHandler* GetXFAWidgetHandler() const;
+
+  FX_BOOL HasXFAAAction(PDFSDK_XFAAActionType eXFAAAT);
+  FX_BOOL OnXFAAAction(PDFSDK_XFAAActionType eXFAAAT,
+                       PDFSDK_FieldAction& data,
+                       CPDFSDK_PageView* pPageView);
+
+  void Synchronize(FX_BOOL bSynchronizeElse);
+  void SynchronizeXFAValue();
+  void SynchronizeXFAItems();
+
+  static void SynchronizeXFAValue(CXFA_FFDocView* pXFADocView,
+                                  CXFA_FFWidget* hWidget,
+                                  CPDF_FormField* pFormField,
+                                  CPDF_FormControl* pFormControl);
+  static void SynchronizeXFAItems(CXFA_FFDocView* pXFADocView,
+                                  CXFA_FFWidget* hWidget,
+                                  CPDF_FormField* pFormField,
+                                  CPDF_FormControl* pFormControl);
+#endif  // PDF_ENABLE_XFA
+
+  CPDFSDK_Widget(CPDF_Annot* pAnnot,
+                 CPDFSDK_PageView* pPageView,
+                 CPDFSDK_InterForm* pInterForm);
+  ~CPDFSDK_Widget() override;
+
+  void AddObserver(Observer* observer);
+  void RemoveObserver(Observer* observer);
+
+  CFX_ByteString GetSubType() const override;
+  CPDF_Action GetAAction(CPDF_AAction::AActionType eAAT) override;
+  FX_BOOL IsAppearanceValid() override;
+
+  int GetLayoutOrder() const override;
+
+  int GetFieldType() const;
+  int GetFieldFlags() const;
+  int GetRotate() const;
+
+  FX_BOOL GetFillColor(FX_COLORREF& color) const;
+  FX_BOOL GetBorderColor(FX_COLORREF& color) const;
+  FX_BOOL GetTextColor(FX_COLORREF& color) const;
+  FX_FLOAT GetFontSize() const;
+
+  int GetSelectedIndex(int nIndex) const;
+#ifndef PDF_ENABLE_XFA
+  CFX_WideString GetValue() const;
+#else
+  CFX_WideString GetValue(FX_BOOL bDisplay = TRUE) const;
+#endif  // PDF_ENABLE_XFA
+  CFX_WideString GetDefaultValue() const;
+  CFX_WideString GetOptionLabel(int nIndex) const;
+  int CountOptions() const;
+  FX_BOOL IsOptionSelected(int nIndex) const;
+  int GetTopVisibleIndex() const;
+  bool IsChecked() const;
+  int GetAlignment() const;
+  int GetMaxLen() const;
+#ifdef PDF_ENABLE_XFA
+  CFX_WideString GetName() const;
+#endif  // PDF_ENABLE_XFA
+  CFX_WideString GetAlternateName() const;
+
+  void SetCheck(bool bChecked, bool bNotify);
+  void SetValue(const CFX_WideString& sValue, FX_BOOL bNotify);
+  void SetDefaultValue(const CFX_WideString& sValue);
+  void SetOptionSelection(int index, FX_BOOL bSelected, FX_BOOL bNotify);
+  void ClearSelection(FX_BOOL bNotify);
+  void SetTopVisibleIndex(int index);
+
+#ifdef PDF_ENABLE_XFA
+  void ResetAppearance(FX_BOOL bValueChanged);
+#endif  // PDF_ENABLE_XFA
+  void ResetAppearance(const FX_WCHAR* sValue, FX_BOOL bValueChanged);
+  void ResetFieldAppearance(FX_BOOL bValueChanged);
+  void UpdateField();
+  CFX_WideString OnFormat(FX_BOOL& bFormated);
+
+  FX_BOOL OnAAction(CPDF_AAction::AActionType type,
+                    PDFSDK_FieldAction& data,
+                    CPDFSDK_PageView* pPageView);
+
+  CPDFSDK_InterForm* GetInterForm() const { return m_pInterForm; }
+  CPDF_FormField* GetFormField() const;
+  CPDF_FormControl* GetFormControl() const;
+  static CPDF_FormControl* GetFormControl(CPDF_InterForm* pInterForm,
+                                          const CPDF_Dictionary* pAnnotDict);
+
+  void DrawShadow(CFX_RenderDevice* pDevice, CPDFSDK_PageView* pPageView);
+
+  void SetAppModified();
+  void ClearAppModified();
+  FX_BOOL IsAppModified() const;
+
+  int32_t GetAppearanceAge() const;
+  int32_t GetValueAge() const;
+
+  FX_BOOL IsWidgetAppearanceValid(CPDF_Annot::AppearanceMode mode);
+  void DrawAppearance(CFX_RenderDevice* pDevice,
+                      const CFX_Matrix* pUser2Device,
+                      CPDF_Annot::AppearanceMode mode,
+                      const CPDF_RenderOptions* pOptions) override;
+
+  FX_BOOL HitTest(FX_FLOAT pageX, FX_FLOAT pageY);
+
+ private:
+  void ResetAppearance_PushButton();
+  void ResetAppearance_CheckBox();
+  void ResetAppearance_RadioButton();
+  void ResetAppearance_ComboBox(const FX_WCHAR* sValue);
+  void ResetAppearance_ListBox();
+  void ResetAppearance_TextField(const FX_WCHAR* sValue);
+
+  CFX_FloatRect GetClientRect() const;
+  CFX_FloatRect GetRotatedRect() const;
+
+  CFX_ByteString GetBackgroundAppStream() const;
+  CFX_ByteString GetBorderAppStream() const;
+  CFX_Matrix GetMatrix() const;
+
+  CPWL_Color GetTextPWLColor() const;
+  CPWL_Color GetBorderPWLColor() const;
+  CPWL_Color GetFillPWLColor() const;
+
+  void AddImageToAppearance(const CFX_ByteString& sAPType, CPDF_Stream* pImage);
+  void RemoveAppearance(const CFX_ByteString& sAPType);
+
+  CPDFSDK_InterForm* const m_pInterForm;
+  FX_BOOL m_bAppModified;
+  int32_t m_nAppAge;
+  int32_t m_nValueAge;
+  std::set<Observer*> m_Observers;
+
+#ifdef PDF_ENABLE_XFA
+  mutable CXFA_FFWidget* m_hMixXFAWidget;
+  mutable CXFA_FFWidgetHandler* m_pWidgetHandler;
+#endif  // PDF_ENABLE_XFA
+};
+
+#endif  // FPDFSDK_INCLUDE_CPDFSDK_WIDGET_H_