// 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 XFA_FWL_CORE_CFWL_EVENT_H_
#define XFA_FWL_CORE_CFWL_EVENT_H_

#include "core/fxcrt/fx_coordinates.h"
#include "core/fxcrt/fx_string.h"
#include "core/fxcrt/fx_system.h"
#include "xfa/fwl/core/cfwl_message.h"
#include "xfa/fwl/core/fwl_error.h"

enum class FWL_SCBCODE {
  None = 1,
  Min,
  Max,
  PageBackward,
  PageForward,
  StepBackward,
  StepForward,
  Pos,
  TrackPos,
  EndScroll,
};

enum class CFWL_EventType {
  None = 0,

  CheckStateChanged,
  CheckWord,
  Click,
  Close,
  CloseUp,
  DrawItem,
  DropDown,
  EditChanged,
  HoverChanged,
  Key,
  KillFocus,
  Mouse,
  MouseWheel,
  PostDropDown,
  PreDropDown,
  PreSelfAdaption,
  Scroll,
  SelectChanged,
  SetFocus,
  SizeChanged,
  TextChanged,
  TextFull,
  Validate
};

enum FWLEventMask {
  FWL_EVENT_MOUSE_MASK = 1 << 0,
  FWL_EVENT_MOUSEWHEEL_MASK = 1 << 1,
  FWL_EVENT_KEY_MASK = 1 << 2,
  FWL_EVENT_FOCUSCHANGED_MASK = 1 << 3,
  FWL_EVENT_DRAW_MASK = 1 << 4,
  FWL_EVENT_CLOSE_MASK = 1 << 5,
  FWL_EVENT_SIZECHANGED_MASK = 1 << 6,
  FWL_EVENT_IDLE_MASK = 1 << 7,
  FWL_EVENT_CONTROL_MASK = 1 << 8,
  FWL_EVENT_ALL_MASK = 0xFF
};

class CFX_Graphics;
class IFWL_Widget;

class CFWL_Event {
 public:
  CFWL_Event();
  virtual ~CFWL_Event();

  virtual CFWL_EventType GetClassID() const;

  uint32_t Release();

  IFWL_Widget* m_pSrcTarget;
  IFWL_Widget* m_pDstTarget;

 private:
  uint32_t m_dwRefCount;
};

inline CFWL_Event::CFWL_Event()
    : m_pSrcTarget(nullptr), m_pDstTarget(nullptr), m_dwRefCount(1) {}

inline CFWL_Event::~CFWL_Event() {}

inline CFWL_EventType CFWL_Event::GetClassID() const {
  return CFWL_EventType::None;
}

inline uint32_t CFWL_Event::Release() {
  m_dwRefCount--;
  uint32_t dwRefCount = m_dwRefCount;
  if (!m_dwRefCount)
    delete this;
  return dwRefCount;
}

#define FWL_EVENT_DEF(classname, eventType, ...)                            \
  class classname : public CFWL_Event {                                     \
   public:                                                                  \
    classname();                                                            \
    ~classname() override;                                                  \
    CFWL_EventType GetClassID() const override;                             \
    __VA_ARGS__                                                             \
  };                                                                        \
  inline classname::classname() {}                                          \
  inline classname::~classname() {}                                         \
  inline CFWL_EventType classname::GetClassID() const { return eventType; }

FWL_EVENT_DEF(CFWL_EvtMouse, CFWL_EventType::Mouse, FX_FLOAT m_fx;
              FX_FLOAT m_fy;
              uint32_t m_dwFlags;
              FWL_MouseCommand m_dwCmd;)

FWL_EVENT_DEF(CFWL_EvtMouseWheel, CFWL_EventType::MouseWheel, FX_FLOAT m_fx;
              FX_FLOAT m_fy;
              FX_FLOAT m_fDeltaX;
              FX_FLOAT m_fDeltaY;
              uint32_t m_dwFlags;)

FWL_EVENT_DEF(CFWL_EvtKey, CFWL_EventType::Key, uint32_t m_dwKeyCode;
              uint32_t m_dwFlags;
              FWL_KeyCommand m_dwCmd;)

FWL_EVENT_DEF(CFWL_EvtSetFocus,
              CFWL_EventType::SetFocus,
              IFWL_Widget* m_pSetFocus;)

FWL_EVENT_DEF(CFWL_EvtKillFocus,
              CFWL_EventType::KillFocus,
              IFWL_Widget* m_pKillFocus;)

FWL_EVENT_DEF(CFWL_EvtClick, CFWL_EventType::Click)

FWL_EVENT_DEF(CFWL_EvtScroll, CFWL_EventType::Scroll, FWL_SCBCODE m_iScrollCode;
              FX_FLOAT m_fPos;
              bool* m_pRet;)

FWL_EVENT_DEF(CFWL_EvtClose, CFWL_EventType::Close)

FWL_EVENT_DEF(CFWL_EvtSizeChanged,
              CFWL_EventType::SizeChanged,
              IFWL_Widget* m_pWidget;
              CFX_RectF m_rtOld;
              CFX_RectF m_rtNew;)

#endif  // XFA_FWL_CORE_CFWL_EVENT_H_