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diff --git a/fpdfsdk/pwl/cpwl_combo_box.h b/fpdfsdk/pwl/cpwl_combo_box.h
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+// 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 FPDFSDK_PWL_CPWL_COMBO_BOX_H_
+#define FPDFSDK_PWL_CPWL_COMBO_BOX_H_
+
+#include <memory>
+
+#include "core/fxcrt/cfx_unowned_ptr.h"
+#include "fpdfsdk/pwl/cpwl_edit.h"
+#include "fpdfsdk/pwl/cpwl_list_box.h"
+#include "fpdfsdk/pwl/cpwl_wnd.h"
+
+class CPWL_CBListBox : public CPWL_ListBox {
+ public:
+ CPWL_CBListBox() {}
+ ~CPWL_CBListBox() override {}
+
+ // CPWL_ListBox
+ bool OnLButtonUp(const CFX_PointF& point, uint32_t nFlag) override;
+
+ bool IsMovementKey(uint16_t nChar) const;
+ bool OnMovementKeyDown(uint16_t nChar, uint32_t nFlag);
+ bool IsChar(uint16_t nChar, uint32_t nFlag) const;
+ bool OnCharNotify(uint16_t nChar, uint32_t nFlag);
+};
+
+#define PWL_COMBOBOX_BUTTON_WIDTH 13
+
+class CPWL_CBButton : public CPWL_Wnd {
+ public:
+ CPWL_CBButton() {}
+ ~CPWL_CBButton() override {}
+
+ // CPWL_Wnd
+ void DrawThisAppearance(CFX_RenderDevice* pDevice,
+ CFX_Matrix* pUser2Device) override;
+ bool OnLButtonDown(const CFX_PointF& point, uint32_t nFlag) override;
+ bool OnLButtonUp(const CFX_PointF& point, uint32_t nFlag) override;
+};
+
+class CPWL_ComboBox : public CPWL_Wnd {
+ public:
+ CPWL_ComboBox();
+ ~CPWL_ComboBox() override;
+
+ CPWL_Edit* GetEdit() const { return m_pEdit.Get(); }
+
+ // CPWL_Wnd:
+ CFX_ByteString GetClassName() const override;
+ void OnCreate(PWL_CREATEPARAM& cp) override;
+ void OnDestroy() override;
+ bool OnKeyDown(uint16_t nChar, uint32_t nFlag) override;
+ bool OnChar(uint16_t nChar, uint32_t nFlag) override;
+ void NotifyLButtonDown(CPWL_Wnd* child, const CFX_PointF& pos) override;
+ void NotifyLButtonUp(CPWL_Wnd* child, const CFX_PointF& pos) override;
+ void CreateChildWnd(const PWL_CREATEPARAM& cp) override;
+ void RePosChildWnd() override;
+ CFX_FloatRect GetFocusRect() const override;
+ void SetFocus() override;
+ void KillFocus() override;
+ CFX_WideString GetSelectedText() override;
+ void DeleteSelectedText() override;
+
+ void SetFillerNotify(IPWL_Filler_Notify* pNotify);
+
+ CFX_WideString GetText() const;
+ void SetText(const CFX_WideString& text);
+ void AddString(const CFX_WideString& str);
+ int32_t GetSelect() const;
+ void SetSelect(int32_t nItemIndex);
+
+ void SetEditSelection(int32_t nStartChar, int32_t nEndChar);
+ void GetEditSelection(int32_t& nStartChar, int32_t& nEndChar) const;
+ void ClearSelection();
+ void SelectAll();
+ bool IsPopup() const;
+
+ void SetSelectText();
+
+ void AttachFFLData(CFFL_FormFiller* pData) { m_pFormFiller = pData; }
+
+ private:
+ void CreateEdit(const PWL_CREATEPARAM& cp);
+ void CreateButton(const PWL_CREATEPARAM& cp);
+ void CreateListBox(const PWL_CREATEPARAM& cp);
+ void SetPopup(bool bPopup);
+
+ CFX_UnownedPtr<CPWL_Edit> m_pEdit;
+ CFX_UnownedPtr<CPWL_CBButton> m_pButton;
+ CFX_UnownedPtr<CPWL_CBListBox> m_pList;
+ CFX_FloatRect m_rcOldWindow;
+ bool m_bPopup = false;
+ bool m_bBottom = true;
+ int32_t m_nSelectItem = -1;
+ CFX_UnownedPtr<IPWL_Filler_Notify> m_pFillerNotify;
+ CFX_UnownedPtr<CFFL_FormFiller> m_pFormFiller;
+};
+
+#endif // FPDFSDK_PWL_CPWL_COMBO_BOX_H_