// 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_form.h"
#include "xfa/fwl/core/ifwl_listbox.h"
#include "xfa/fxgraphics/cfx_graphics.h"

class CFWL_WidgetImpProperties;
class IFWL_ComboBox;
class IFWL_ComboBoxProxy;
class IFWL_ComboEdit;
class IFWL_ComboList;
class IFWL_FormProxy;
class IFWL_ListBox;
class IFWL_Widget;

#define FWL_STYLEEXT_CMB_DropList (0L << 0)
#define FWL_STYLEEXT_CMB_DropDown (1L << 0)
#define FWL_STYLEEXT_CMB_Sort (1L << 1)
#define FWL_STYLEEXT_CMB_ListDrag (1L << 2)
#define FWL_STYLEEXT_CMB_OwnerDraw (1L << 3)
#define FWL_STYLEEXT_CMB_EditHNear (0L << 4)
#define FWL_STYLEEXT_CMB_EditHCenter (1L << 4)
#define FWL_STYLEEXT_CMB_EditHFar (2L << 4)
#define FWL_STYLEEXT_CMB_EditVNear (0L << 6)
#define FWL_STYLEEXT_CMB_EditVCenter (1L << 6)
#define FWL_STYLEEXT_CMB_EditVFar (2L << 6)
#define FWL_STYLEEXT_CMB_EditJustified (1L << 8)
#define FWL_STYLEEXT_CMB_EditDistributed (2L << 8)
#define FWL_STYLEEXT_CMB_EditHAlignMask (3L << 4)
#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)

FWL_EVENT_DEF(CFWL_EvtCmbPreDropDown, CFWL_EventType::PreDropDown)

FWL_EVENT_DEF(CFWL_EvtCmbPostDropDown, CFWL_EventType::PostDropDown)

FWL_EVENT_DEF(CFWL_EvtCmbCloseUp, CFWL_EventType::CloseUp)

FWL_EVENT_DEF(CFWL_EvtCmbEditChanged,
              CFWL_EventType::EditChanged,
              int32_t nChangeType;
              CFX_WideString wsInsert;
              CFX_WideString wsDelete;)

FWL_EVENT_DEF(CFWL_EvtCmbSelChanged,
              CFWL_EventType::SelectChanged,
              CFX_Int32Array iArraySels;
              bool bLButtonUp;)

FWL_EVENT_DEF(CFWL_EvtCmbHoverChanged,
              CFWL_EventType::HoverChanged,
              int32_t m_iCurHover;)

FWL_EVENT_DEF(CFWL_EvtCmbDrawItem,
              CFWL_EventType::DrawItem,
              CFX_Graphics* m_pGraphics;
              CFX_Matrix m_matrix;
              int32_t m_index;
              CFX_RectF m_rtItem;)

class IFWL_ComboBoxDP : public IFWL_ListBoxDP {
 public:
  virtual FX_FLOAT GetListHeight(IFWL_Widget* pWidget) = 0;
};

class IFWL_ComboBox : public IFWL_Widget {
 public:
  explicit IFWL_ComboBox(const IFWL_App* app,
                         const CFWL_WidgetImpProperties& properties);
  ~IFWL_ComboBox() override;

  // IFWL_Widget
  FWL_Type GetClassID() const override;
  FWL_Error GetWidgetRect(CFX_RectF& rect, bool bAutoSize = false) override;
  FWL_Error ModifyStylesEx(uint32_t dwStylesExAdded,
                           uint32_t dwStylesExRemoved) override;
  void SetStates(uint32_t dwStates, bool bSet = true) 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;
  void OnProcessMessage(CFWL_Message* pMessage) override;
  void OnProcessEvent(CFWL_Event* pEvent) override;
  void OnDrawWidget(CFX_Graphics* pGraphics,
                    const CFX_Matrix* pMatrix) override;

  int32_t GetCurSel();
  FWL_Error SetCurSel(int32_t iSel);
  FWL_Error SetEditText(const CFX_WideString& wsText);
  int32_t GetEditTextLength() const;
  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_Error SetEditLimit(int32_t nLimit);
  FWL_Error EditDoClipboard(int32_t iCmd);
  bool EditRedo(const IFDE_TxtEdtDoRecord* pRecord);
  bool EditUndo(const IFDE_TxtEdtDoRecord* pRecord);
  IFWL_ListBox* GetListBoxt();
  bool AfterFocusShowDropList();
  FWL_Error OpenDropDownList(bool bActivate);
  bool EditCanUndo();
  bool EditCanRedo();
  bool EditUndo();
  bool EditRedo();
  bool EditCanCopy();
  bool EditCanCut();
  bool EditCanSelectAll();
  bool EditCopy(CFX_WideString& wsCopy);
  bool EditCut(CFX_WideString& wsCut);
  bool EditPaste(const CFX_WideString& wsPaste);
  bool EditSelectAll();
  bool EditDelete();
  bool EditDeSelect();
  FWL_Error GetBBox(CFX_RectF& rect);
  FWL_Error EditModifyStylesEx(uint32_t dwStylesExAdded,
                               uint32_t dwStylesExRemoved);

  void DrawStretchHandler(CFX_Graphics* pGraphics, const CFX_Matrix* pMatrix);
  bool IsDropListShowed();
  void ShowDropList(bool bActivate);

  IFWL_ComboEdit* GetComboEdit() const { return m_pEdit.get(); }
  void ProcessSelChanged(bool bLButtonUp);
  int32_t GetCurrentSelection() const { return m_iCurSel; }

 protected:
  FX_FLOAT GetListHeight();
  bool IsDropDownStyle() const;
  void MatchEditText();
  void SynchrEditText(int32_t iListItem);
  void Layout();
  void ReSetTheme();
  void ReSetEditAlignment();
  void ReSetListItemAlignment();
  void InitProxyForm();
  void DisForm_InitComboList();
  void DisForm_InitComboEdit();
  void DisForm_ShowDropList(bool bActivate);
  bool DisForm_IsDropListShowed();
  FWL_Error DisForm_ModifyStylesEx(uint32_t dwStylesExAdded,
                                   uint32_t dwStylesExRemoved);
  FWL_Error DisForm_Update();
  FWL_WidgetHit DisForm_HitTest(FX_FLOAT fx, FX_FLOAT fy);
  FWL_Error DisForm_DrawWidget(CFX_Graphics* pGraphics,
                               const CFX_Matrix* pMatrix = nullptr);
  FWL_Error DisForm_GetBBox(CFX_RectF& rect);
  void DisForm_Layout();

  CFX_RectF m_rtClient;
  CFX_RectF m_rtContent;
  CFX_RectF m_rtBtn;
  CFX_RectF m_rtList;
  CFX_RectF m_rtProxy;
  CFX_RectF m_rtHandler;
  std::unique_ptr<IFWL_ComboEdit> m_pEdit;
  std::unique_ptr<IFWL_ComboList> m_pListBox;
  IFWL_ComboBoxProxy* m_pComboBoxProxy;
  bool m_bLButtonDown;
  bool m_bUpFormHandler;
  int32_t m_iCurSel;
  int32_t m_iBtnState;
  FX_FLOAT m_fComboFormHandler;
  FX_FLOAT m_fItemHeight;
  bool m_bNeedShowList;

 private:
  void OnFocusChanged(CFWL_Message* pMsg, bool bSet = true);
  void OnLButtonDown(CFWL_MsgMouse* pMsg);
  void OnLButtonUp(CFWL_MsgMouse* pMsg);
  void OnMouseMove(CFWL_MsgMouse* pMsg);
  void OnMouseLeave(CFWL_MsgMouse* pMsg);
  void OnKey(CFWL_MsgKey* pMsg);
  void DoSubCtrlKey(CFWL_MsgKey* pMsg);
  void DisForm_OnProcessMessage(CFWL_Message* pMessage);
  void DisForm_OnLButtonDown(CFWL_MsgMouse* pMsg);
  void DisForm_OnFocusChanged(CFWL_Message* pMsg, bool bSet = true);
  void DisForm_OnKey(CFWL_MsgKey* pMsg);

};

#endif  // XFA_FWL_CORE_IFWL_COMBOBOX_H_