// 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

#include "xfa/fwl/core/ifwl_monthcalendar.h"

#include <algorithm>
#include <memory>
#include <utility>

#include "third_party/base/ptr_util.h"
#include "xfa/fde/tto/fde_textout.h"
#include "xfa/fwl/core/cfwl_msgmouse.h"
#include "xfa/fwl/core/cfwl_themebackground.h"
#include "xfa/fwl/core/cfwl_themetext.h"
#include "xfa/fwl/core/fwl_noteimp.h"
#include "xfa/fwl/core/ifwl_datetimepicker.h"
#include "xfa/fwl/core/ifwl_formproxy.h"
#include "xfa/fwl/core/ifwl_themeprovider.h"

#define MONTHCAL_HSEP_HEIGHT 1
#define MONTHCAL_VSEP_WIDTH 1
#define MONTHCAL_HMARGIN 3
#define MONTHCAL_VMARGIN 2
#define MONTHCAL_ROWS 9
#define MONTHCAL_COLUMNS 7
#define MONTHCAL_HEADER_BTN_VMARGIN 7
#define MONTHCAL_HEADER_BTN_HMARGIN 5

namespace {

CFX_WideString* GetCapacityForDay(IFWL_ThemeProvider* pTheme,
                                  CFWL_ThemePart& params,
                                  uint32_t day) {
  ASSERT(day < 7);

  if (day == 0) {
    return static_cast<CFX_WideString*>(
        pTheme->GetCapacity(&params, CFWL_WidgetCapacity::Sun));
  }
  if (day == 1) {
    return static_cast<CFX_WideString*>(
        pTheme->GetCapacity(&params, CFWL_WidgetCapacity::Mon));
  }
  if (day == 2) {
    return static_cast<CFX_WideString*>(
        pTheme->GetCapacity(&params, CFWL_WidgetCapacity::Tue));
  }
  if (day == 3) {
    return static_cast<CFX_WideString*>(
        pTheme->GetCapacity(&params, CFWL_WidgetCapacity::Wed));
  }
  if (day == 4) {
    return static_cast<CFX_WideString*>(
        pTheme->GetCapacity(&params, CFWL_WidgetCapacity::Thu));
  }
  if (day == 5) {
    return static_cast<CFX_WideString*>(
        pTheme->GetCapacity(&params, CFWL_WidgetCapacity::Fri));
  }

  return static_cast<CFX_WideString*>(
      pTheme->GetCapacity(&params, CFWL_WidgetCapacity::Sat));
}

CFX_WideString* GetCapacityForMonth(IFWL_ThemeProvider* pTheme,
                                    CFWL_ThemePart& params,
                                    uint32_t month) {
  ASSERT(month < 12);

  if (month == 0) {
    return static_cast<CFX_WideString*>(
        pTheme->GetCapacity(&params, CFWL_WidgetCapacity::January));
  }
  if (month == 1) {
    return static_cast<CFX_WideString*>(
        pTheme->GetCapacity(&params, CFWL_WidgetCapacity::February));
  }
  if (month == 2) {
    return static_cast<CFX_WideString*>(
        pTheme->GetCapacity(&params, CFWL_WidgetCapacity::March));
  }
  if (month == 3) {
    return static_cast<CFX_WideString*>(
        pTheme->GetCapacity(&params, CFWL_WidgetCapacity::April));
  }
  if (month == 4) {
    return static_cast<CFX_WideString*>(
        pTheme->GetCapacity(&params, CFWL_WidgetCapacity::May));
  }
  if (month == 5) {
    return static_cast<CFX_WideString*>(
        pTheme->GetCapacity(&params, CFWL_WidgetCapacity::June));
  }
  if (month == 6) {
    return static_cast<CFX_WideString*>(
        pTheme->GetCapacity(&params, CFWL_WidgetCapacity::July));
  }
  if (month == 7) {
    return static_cast<CFX_WideString*>(
        pTheme->GetCapacity(&params, CFWL_WidgetCapacity::August));
  }
  if (month == 8) {
    return static_cast<CFX_WideString*>(
        pTheme->GetCapacity(&params, CFWL_WidgetCapacity::September));
  }
  if (month == 9) {
    return static_cast<CFX_WideString*>(
        pTheme->GetCapacity(&params, CFWL_WidgetCapacity::October));
  }
  if (month == 10) {
    return static_cast<CFX_WideString*>(
        pTheme->GetCapacity(&params, CFWL_WidgetCapacity::November));
  }

  return static_cast<CFX_WideString*>(
      pTheme->GetCapacity(&params, CFWL_WidgetCapacity::December));
}

}  // namespace

IFWL_MonthCalendar::IFWL_MonthCalendar(
    const IFWL_App* app,
    std::unique_ptr<CFWL_WidgetProperties> properties,
    IFWL_Widget* pOuter)
    : IFWL_Widget(app, std::move(properties), pOuter),
      m_bInitialized(false),
      m_pDateTime(new CFX_DateTime),
      m_iCurYear(2011),
      m_iCurMonth(1),
      m_iYear(2011),
      m_iMonth(1),
      m_iDay(1),
      m_iHovered(-1),
      m_iLBtnPartStates(CFWL_PartState_Normal),
      m_iRBtnPartStates(CFWL_PartState_Normal),
      m_bFlag(false) {
  m_rtHead.Reset();
  m_rtWeek.Reset();
  m_rtLBtn.Reset();
  m_rtRBtn.Reset();
  m_rtDates.Reset();
  m_rtHSep.Reset();
  m_rtHeadText.Reset();
  m_rtToday.Reset();
  m_rtTodayFlag.Reset();
  m_rtClient.Reset();
  m_rtWeekNum.Reset();
  m_rtWeekNumSep.Reset();
}

IFWL_MonthCalendar::~IFWL_MonthCalendar() {
  ClearDateItem();
  m_arrSelDays.RemoveAll();
}

FWL_Type IFWL_MonthCalendar::GetClassID() const {
  return FWL_Type::MonthCalendar;
}

void IFWL_MonthCalendar::GetWidgetRect(CFX_RectF& rect, bool bAutoSize) {
  if (!bAutoSize) {
    rect = m_pProperties->m_rtWidget;
    return;
  }

  CFX_SizeF fs = CalcSize(true);
  rect.Set(0, 0, fs.x, fs.y);
  IFWL_Widget::GetWidgetRect(rect, true);
}

void IFWL_MonthCalendar::Update() {
  if (IsLocked())
    return;
  if (!m_pProperties->m_pThemeProvider)
    m_pProperties->m_pThemeProvider = GetAvailableTheme();

  GetCapValue();
  if (!m_bInitialized) {
    InitDate();
    m_bInitialized = true;
  }

  ClearDateItem();
  ResetDateItem();
  Layout();
}

void IFWL_MonthCalendar::DrawWidget(CFX_Graphics* pGraphics,
                                    const CFX_Matrix* pMatrix) {
  if (!pGraphics)
    return;
  if (!m_pProperties->m_pThemeProvider)
    m_pProperties->m_pThemeProvider = GetAvailableTheme();

  IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
  if (HasBorder())
    DrawBorder(pGraphics, CFWL_Part::Border, pTheme, pMatrix);
  if (HasEdge())
    DrawEdge(pGraphics, CFWL_Part::Edge, pTheme, pMatrix);

  DrawBackground(pGraphics, pTheme, pMatrix);
  DrawHeadBK(pGraphics, pTheme, pMatrix);
  DrawLButton(pGraphics, pTheme, pMatrix);
  DrawRButton(pGraphics, pTheme, pMatrix);
  DrawSeperator(pGraphics, pTheme, pMatrix);
  DrawDatesInBK(pGraphics, pTheme, pMatrix);
  DrawDatesInCircle(pGraphics, pTheme, pMatrix);
  DrawCaption(pGraphics, pTheme, pMatrix);
  DrawWeek(pGraphics, pTheme, pMatrix);
  DrawDatesIn(pGraphics, pTheme, pMatrix);
  DrawDatesOut(pGraphics, pTheme, pMatrix);
  DrawToday(pGraphics, pTheme, pMatrix);
  if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_MCD_WeekNumbers) {
    DrawWeekNumberSep(pGraphics, pTheme, pMatrix);
    DrawWeekNumber(pGraphics, pTheme, pMatrix);
  }
}

void IFWL_MonthCalendar::SetSelect(int32_t iYear,
                                   int32_t iMonth,
                                   int32_t iDay) {
  ChangeToMonth(iYear, iMonth);
  AddSelDay(iDay);
}

void IFWL_MonthCalendar::DrawBackground(CFX_Graphics* pGraphics,
                                        IFWL_ThemeProvider* pTheme,
                                        const CFX_Matrix* pMatrix) {
  CFWL_ThemeBackground params;
  params.m_pWidget = this;
  params.m_iPart = CFWL_Part::Background;
  params.m_pGraphics = pGraphics;
  params.m_dwStates = CFWL_PartState_Normal;
  params.m_rtPart = m_rtClient;
  if (pMatrix)
    params.m_matrix.Concat(*pMatrix);
  pTheme->DrawBackground(&params);
}

void IFWL_MonthCalendar::DrawHeadBK(CFX_Graphics* pGraphics,
                                    IFWL_ThemeProvider* pTheme,
                                    const CFX_Matrix* pMatrix) {
  CFWL_ThemeBackground params;
  params.m_pWidget = this;
  params.m_iPart = CFWL_Part::Header;
  params.m_pGraphics = pGraphics;
  params.m_dwStates = CFWL_PartState_Normal;
  params.m_rtPart = m_rtHead;
  if (pMatrix)
    params.m_matrix.Concat(*pMatrix);
  pTheme->DrawBackground(&params);
}

void IFWL_MonthCalendar::DrawLButton(CFX_Graphics* pGraphics,
                                     IFWL_ThemeProvider* pTheme,
                                     const CFX_Matrix* pMatrix) {
  CFWL_ThemeBackground params;
  params.m_pWidget = this;
  params.m_iPart = CFWL_Part::LBtn;
  params.m_pGraphics = pGraphics;
  params.m_dwStates = m_iLBtnPartStates;
  params.m_rtPart = m_rtLBtn;
  if (pMatrix)
    params.m_matrix.Concat(*pMatrix);
  pTheme->DrawBackground(&params);
}

void IFWL_MonthCalendar::DrawRButton(CFX_Graphics* pGraphics,
                                     IFWL_ThemeProvider* pTheme,
                                     const CFX_Matrix* pMatrix) {
  CFWL_ThemeBackground params;
  params.m_pWidget = this;
  params.m_iPart = CFWL_Part::RBtn;
  params.m_pGraphics = pGraphics;
  params.m_dwStates = m_iRBtnPartStates;
  params.m_rtPart = m_rtRBtn;
  if (pMatrix)
    params.m_matrix.Concat(*pMatrix);
  pTheme->DrawBackground(&params);
}

void IFWL_MonthCalendar::DrawCaption(CFX_Graphics* pGraphics,
                                     IFWL_ThemeProvider* pTheme,
                                     const CFX_Matrix* pMatrix) {
  CFWL_ThemeText textParam;
  textParam.m_pWidget = this;
  textParam.m_iPart = CFWL_Part::Caption;
  textParam.m_dwStates = CFWL_PartState_Normal;
  textParam.m_pGraphics = pGraphics;
  int32_t iYear;
  int32_t iMonth;
  iYear = m_iCurYear;
  iMonth = m_iCurMonth;
  CFX_WideString wsCation;
  GetHeadText(iYear, iMonth, wsCation);
  textParam.m_wsText = wsCation;
  m_szHead = CalcTextSize(textParam.m_wsText, m_pProperties->m_pThemeProvider);
  CalcHeadSize();
  textParam.m_rtPart = m_rtHeadText;
  textParam.m_dwTTOStyles = FDE_TTOSTYLE_SingleLine;
  textParam.m_iTTOAlign = FDE_TTOALIGNMENT_Center;
  if (pMatrix)
    textParam.m_matrix.Concat(*pMatrix);
  pTheme->DrawText(&textParam);
}

void IFWL_MonthCalendar::DrawSeperator(CFX_Graphics* pGraphics,
                                       IFWL_ThemeProvider* pTheme,
                                       const CFX_Matrix* pMatrix) {
  CFWL_ThemeBackground params;
  params.m_pWidget = this;
  params.m_iPart = CFWL_Part::HSeparator;
  params.m_pGraphics = pGraphics;
  params.m_dwStates = CFWL_PartState_Normal;
  params.m_rtPart = m_rtHSep;
  if (pMatrix)
    params.m_matrix.Concat(*pMatrix);
  pTheme->DrawBackground(&params);
}

void IFWL_MonthCalendar::DrawDatesInBK(CFX_Graphics* pGraphics,
                                       IFWL_ThemeProvider* pTheme,
                                       const CFX_Matrix* pMatrix) {
  CFWL_ThemeBackground params;
  params.m_pWidget = this;
  params.m_iPart = CFWL_Part::DateInBK;
  params.m_pGraphics = pGraphics;
  if (pMatrix)
    params.m_matrix.Concat(*pMatrix);

  int32_t iCount = m_arrDates.GetSize();
  for (int32_t j = 0; j < iCount; j++) {
    DATEINFO* pDataInfo = m_arrDates.GetAt(j);
    if (pDataInfo->dwStates & FWL_ITEMSTATE_MCD_Selected) {
      params.m_dwStates |= CFWL_PartState_Selected;
      if (((m_pProperties->m_dwStyleExes & FWL_STYLEEXT_MCD_NoTodayCircle) ==
           0) &&
          pDataInfo->dwStates & FWL_ITEMSTATE_MCD_Flag) {
        params.m_dwStates |= CFWL_PartState_Flagged;
      }
      if (pDataInfo->dwStates & FWL_ITEMSTATE_MCD_Focused)
        params.m_dwStates |= CFWL_PartState_Focused;
    } else if (j == m_iHovered - 1) {
      params.m_dwStates |= CFWL_PartState_Hovered;
    } else if (pDataInfo->dwStates & FWL_ITEMSTATE_MCD_Flag) {
      params.m_dwStates = CFWL_PartState_Flagged;
      pTheme->DrawBackground(&params);
    }
    params.m_rtPart = pDataInfo->rect;
    pTheme->DrawBackground(&params);
    params.m_dwStates = 0;
  }
}

void IFWL_MonthCalendar::DrawWeek(CFX_Graphics* pGraphics,
                                  IFWL_ThemeProvider* pTheme,
                                  const CFX_Matrix* pMatrix) {
  CFWL_ThemeText params;
  params.m_pWidget = this;
  params.m_iPart = CFWL_Part::Week;
  params.m_pGraphics = pGraphics;
  params.m_dwStates = CFWL_PartState_Normal;
  params.m_iTTOAlign = FDE_TTOALIGNMENT_Center;
  CFX_RectF rtDayOfWeek;
  if (pMatrix)
    params.m_matrix.Concat(*pMatrix);

  for (int32_t i = 0; i < 7; i++) {
    rtDayOfWeek.Set(m_rtWeek.left + i * (m_szCell.x + MONTHCAL_HMARGIN * 2),
                    m_rtWeek.top, m_szCell.x, m_szCell.y);
    params.m_rtPart = rtDayOfWeek;
    params.m_wsText = *GetCapacityForDay(pTheme, params, i);
    params.m_dwTTOStyles = FDE_TTOSTYLE_SingleLine;
    pTheme->DrawText(&params);
  }
}

void IFWL_MonthCalendar::DrawWeekNumber(CFX_Graphics* pGraphics,
                                        IFWL_ThemeProvider* pTheme,
                                        const CFX_Matrix* pMatrix) {
  CFWL_ThemeText params;
  params.m_pWidget = this;
  params.m_iPart = CFWL_Part::WeekNum;
  params.m_pGraphics = pGraphics;
  params.m_dwStates = CFWL_PartState_Normal;
  params.m_iTTOAlign = FDE_TTOALIGNMENT_CenterLeft;
  CFX_WideString wsWeekNum;
  params.m_dwTTOStyles = FDE_TTOSTYLE_SingleLine;
  params.m_iTTOAlign = FDE_TTOALIGNMENT_Center;
  if (pMatrix)
    params.m_matrix.Concat(*pMatrix);

  int32_t iMonthNum = m_pDateTime->GetMonth();
  int32_t iDayNum = FX_DaysInMonth(m_iCurYear, iMonthNum);
  int32_t iTemp = 0;
  FX_FLOAT fVStartPos = m_rtClient.top + m_fHeadHei + m_fHSepHei;
  FX_FLOAT fHStartPos = m_rtClient.left;
  for (int32_t i = 1; i <= iDayNum; i += 7) {
    iTemp++;
    m_rtWeekNum.Set(fHStartPos, fVStartPos + m_fDateCellHei * iTemp,
                    m_fWeekNumWid, m_fDateCellHei);
    wsWeekNum.Format(L"0");
    params.m_wsText = wsWeekNum;
    params.m_rtPart = m_rtWeekNum;
    pTheme->DrawText(&params);
  }
}

void IFWL_MonthCalendar::DrawWeekNumberSep(CFX_Graphics* pGraphics,
                                           IFWL_ThemeProvider* pTheme,
                                           const CFX_Matrix* pMatrix) {
  CFWL_ThemeBackground params;
  params.m_pWidget = this;
  params.m_iPart = CFWL_Part::WeekNumSep;
  params.m_pGraphics = pGraphics;
  params.m_dwStates = CFWL_PartState_Normal;
  params.m_rtPart = m_rtWeekNumSep;
  if (pMatrix)
    params.m_matrix.Concat(*pMatrix);
  pTheme->DrawBackground(&params);
}

void IFWL_MonthCalendar::DrawToday(CFX_Graphics* pGraphics,
                                   IFWL_ThemeProvider* pTheme,
                                   const CFX_Matrix* pMatrix) {
  if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_MCD_NoToday)
    return;

  CFWL_ThemeText params;
  params.m_pWidget = this;
  params.m_iPart = CFWL_Part::Today;
  params.m_pGraphics = pGraphics;
  params.m_dwStates = CFWL_PartState_Normal;
  params.m_iTTOAlign = FDE_TTOALIGNMENT_CenterLeft;

  CFX_WideString* wsDay = static_cast<CFX_WideString*>(
      pTheme->GetCapacity(&params, CFWL_WidgetCapacity::Today));
  CFX_WideString wsText;
  GetTodayText(m_iYear, m_iMonth, m_iDay, wsText);
  params.m_wsText = *wsDay + wsText;

  m_szToday = CalcTextSize(params.m_wsText, m_pProperties->m_pThemeProvider);
  CalcTodaySize();
  params.m_rtPart = m_rtToday;
  params.m_dwTTOStyles = FDE_TTOSTYLE_SingleLine;
  if (pMatrix)
    params.m_matrix.Concat(*pMatrix);
  pTheme->DrawText(&params);
}

void IFWL_MonthCalendar::DrawDatesIn(CFX_Graphics* pGraphics,
                                     IFWL_ThemeProvider* pTheme,
                                     const CFX_Matrix* pMatrix) {
  CFWL_ThemeText params;
  params.m_pWidget = this;
  params.m_iPart = CFWL_Part::DatesIn;
  params.m_pGraphics = pGraphics;
  params.m_dwStates = CFWL_PartState_Normal;
  params.m_iTTOAlign = FDE_TTOALIGNMENT_Center;
  if (pMatrix)
    params.m_matrix.Concat(*pMatrix);

  int32_t iCount = m_arrDates.GetSize();
  for (int32_t j = 0; j < iCount; j++) {
    DATEINFO* pDataInfo = m_arrDates.GetAt(j);
    params.m_wsText = pDataInfo->wsDay;
    params.m_rtPart = pDataInfo->rect;
    params.m_dwStates = pDataInfo->dwStates;
    if (j + 1 == m_iHovered)
      params.m_dwStates |= CFWL_PartState_Hovered;
    params.m_dwTTOStyles = FDE_TTOSTYLE_SingleLine;
    pTheme->DrawText(&params);
  }
}

void IFWL_MonthCalendar::DrawDatesOut(CFX_Graphics* pGraphics,
                                      IFWL_ThemeProvider* pTheme,
                                      const CFX_Matrix* pMatrix) {
  CFWL_ThemeText params;
  params.m_pWidget = this;
  params.m_iPart = CFWL_Part::DatesOut;
  params.m_pGraphics = pGraphics;
  params.m_dwStates = CFWL_PartState_Normal;
  params.m_iTTOAlign = FDE_TTOALIGNMENT_Center;
  if (pMatrix)
    params.m_matrix.Concat(*pMatrix);
  pTheme->DrawText(&params);
}

void IFWL_MonthCalendar::DrawDatesInCircle(CFX_Graphics* pGraphics,
                                           IFWL_ThemeProvider* pTheme,
                                           const CFX_Matrix* pMatrix) {
  if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_MCD_NoTodayCircle)
    return;
  if (m_iMonth != m_iCurMonth || m_iYear != m_iCurYear)
    return;
  if (m_iDay < 1 || m_iDay > m_arrDates.GetSize())
    return;

  DATEINFO* pDate = m_arrDates[m_iDay - 1];
  if (!pDate)
    return;

  CFWL_ThemeBackground params;
  params.m_pWidget = this;
  params.m_iPart = CFWL_Part::DateInCircle;
  params.m_pGraphics = pGraphics;
  params.m_rtPart = pDate->rect;
  params.m_dwStates = CFWL_PartState_Normal;
  if (pMatrix)
    params.m_matrix.Concat(*pMatrix);
  pTheme->DrawBackground(&params);
}

CFX_SizeF IFWL_MonthCalendar::CalcSize(bool bAutoSize) {
  if (!m_pProperties->m_pThemeProvider)
    return CFX_SizeF();
  if (!bAutoSize) {
    GetClientRect(m_rtClient);
    return CFX_SizeF(m_rtClient.width, m_rtClient.height);
  }

  CFX_SizeF fs;
  CFWL_ThemePart params;
  params.m_pWidget = this;
  IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
  FX_FLOAT fMaxWeekW = 0.0f;
  FX_FLOAT fMaxWeekH = 0.0f;

  for (uint32_t i = 0; i < 7; ++i) {
    CFX_SizeF sz = CalcTextSize(*GetCapacityForDay(pTheme, params, i),
                                m_pProperties->m_pThemeProvider);
    fMaxWeekW = (fMaxWeekW >= sz.x) ? fMaxWeekW : sz.x;
    fMaxWeekH = (fMaxWeekH >= sz.y) ? fMaxWeekH : sz.y;
  }

  FX_FLOAT fDayMaxW = 0.0f;
  FX_FLOAT fDayMaxH = 0.0f;
  for (int day = 10; day <= 31; day++) {
    CFX_WideString wsDay;
    wsDay.Format(L"%d", day);
    CFX_SizeF sz = CalcTextSize(wsDay, m_pProperties->m_pThemeProvider);
    fDayMaxW = (fDayMaxW >= sz.x) ? fDayMaxW : sz.x;
    fDayMaxH = (fDayMaxH >= sz.y) ? fDayMaxH : sz.y;
  }
  m_szCell.x = FX_FLOAT((fMaxWeekW >= fDayMaxW) ? (int)(fMaxWeekW + 0.5)
                                                : (int)(fDayMaxW + 0.5));
  m_szCell.y = (fMaxWeekH >= fDayMaxH) ? fMaxWeekH : fDayMaxH;
  fs.x = m_szCell.x * MONTHCAL_COLUMNS +
         MONTHCAL_HMARGIN * MONTHCAL_COLUMNS * 2 +
         MONTHCAL_HEADER_BTN_HMARGIN * 2;
  FX_FLOAT fMonthMaxW = 0.0f;
  FX_FLOAT fMonthMaxH = 0.0f;

  for (uint32_t i = 0; i < 12; ++i) {
    CFX_SizeF sz = CalcTextSize(*GetCapacityForMonth(pTheme, params, i),
                                m_pProperties->m_pThemeProvider);
    fMonthMaxW = (fMonthMaxW >= sz.x) ? fMonthMaxW : sz.x;
    fMonthMaxH = (fMonthMaxH >= sz.y) ? fMonthMaxH : sz.y;
  }

  CFX_WideString wsYear;
  GetHeadText(m_iYear, m_iMonth, wsYear);

  CFX_SizeF szYear = CalcTextSize(wsYear, m_pProperties->m_pThemeProvider);
  fMonthMaxH = std::max(fMonthMaxH, szYear.y);
  m_szHead = CFX_SizeF(fMonthMaxW + szYear.x, fMonthMaxH);
  fMonthMaxW = m_szHead.x + MONTHCAL_HEADER_BTN_HMARGIN * 2 + m_szCell.x * 2;
  fs.x = std::max(fs.x, fMonthMaxW);

  CFX_WideString wsToday;
  GetTodayText(m_iYear, m_iMonth, m_iDay, wsToday);
  CFX_WideString* wsText = static_cast<CFX_WideString*>(
      pTheme->GetCapacity(&params, CFWL_WidgetCapacity::Today));
  m_wsToday = *wsText + wsToday;
  m_szToday = CalcTextSize(wsToday, m_pProperties->m_pThemeProvider);
  m_szToday.y = (m_szToday.y >= m_szCell.y) ? m_szToday.y : m_szCell.y;
  fs.y = m_szCell.x + m_szCell.y * (MONTHCAL_ROWS - 2) + m_szToday.y +
         MONTHCAL_VMARGIN * MONTHCAL_ROWS * 2 + MONTHCAL_HEADER_BTN_VMARGIN * 4;
  return fs;
}

void IFWL_MonthCalendar::CalcHeadSize() {
  FX_FLOAT fHeadHMargin = (m_rtClient.width - m_szHead.x) / 2;
  FX_FLOAT fHeadVMargin = (m_szCell.x - m_szHead.y) / 2;
  m_rtHeadText.Set(m_rtClient.left + fHeadHMargin,
                   m_rtClient.top + MONTHCAL_HEADER_BTN_VMARGIN +
                       MONTHCAL_VMARGIN + fHeadVMargin,
                   m_szHead.x, m_szHead.y);
}

void IFWL_MonthCalendar::CalcTodaySize() {
  m_rtTodayFlag.Set(
      m_rtClient.left + MONTHCAL_HEADER_BTN_HMARGIN + MONTHCAL_HMARGIN,
      m_rtDates.bottom() + MONTHCAL_HEADER_BTN_VMARGIN + MONTHCAL_VMARGIN,
      m_szCell.x, m_szToday.y);
  m_rtToday.Set(
      m_rtClient.left + MONTHCAL_HEADER_BTN_HMARGIN + m_szCell.x +
          MONTHCAL_HMARGIN * 2,
      m_rtDates.bottom() + MONTHCAL_HEADER_BTN_VMARGIN + MONTHCAL_VMARGIN,
      m_szToday.x, m_szToday.y);
}

void IFWL_MonthCalendar::Layout() {
  GetClientRect(m_rtClient);

  m_rtHead.Set(
      m_rtClient.left + MONTHCAL_HEADER_BTN_HMARGIN, m_rtClient.top,
      m_rtClient.width - MONTHCAL_HEADER_BTN_HMARGIN * 2,
      m_szCell.x + (MONTHCAL_HEADER_BTN_VMARGIN + MONTHCAL_VMARGIN) * 2);
  m_rtWeek.Set(m_rtClient.left + MONTHCAL_HEADER_BTN_HMARGIN, m_rtHead.bottom(),
               m_rtClient.width - MONTHCAL_HEADER_BTN_HMARGIN * 2,
               m_szCell.y + MONTHCAL_VMARGIN * 2);
  m_rtLBtn.Set(m_rtClient.left + MONTHCAL_HEADER_BTN_HMARGIN,
               m_rtClient.top + MONTHCAL_HEADER_BTN_VMARGIN, m_szCell.x,
               m_szCell.x);
  m_rtRBtn.Set(m_rtClient.left + m_rtClient.width -
                   MONTHCAL_HEADER_BTN_HMARGIN - m_szCell.x,
               m_rtClient.top + MONTHCAL_HEADER_BTN_VMARGIN, m_szCell.x,
               m_szCell.x);
  m_rtHSep.Set(
      m_rtClient.left + MONTHCAL_HEADER_BTN_HMARGIN + MONTHCAL_HMARGIN,
      m_rtWeek.bottom() - MONTHCAL_VMARGIN,
      m_rtClient.width - (MONTHCAL_HEADER_BTN_HMARGIN + MONTHCAL_HMARGIN) * 2,
      MONTHCAL_HSEP_HEIGHT);
  m_rtDates.Set(m_rtClient.left + MONTHCAL_HEADER_BTN_HMARGIN,
                m_rtWeek.bottom(),
                m_rtClient.width - MONTHCAL_HEADER_BTN_HMARGIN * 2,
                m_szCell.y * (MONTHCAL_ROWS - 3) +
                    MONTHCAL_VMARGIN * (MONTHCAL_ROWS - 3) * 2);

  CalDateItem();
}

void IFWL_MonthCalendar::CalDateItem() {
  bool bNewWeek = false;
  int32_t iWeekOfMonth = 0;
  FX_FLOAT fLeft = m_rtDates.left;
  FX_FLOAT fTop = m_rtDates.top;
  int32_t iCount = m_arrDates.GetSize();
  for (int32_t i = 0; i < iCount; i++) {
    DATEINFO* pDateInfo = m_arrDates.GetAt(i);
    if (bNewWeek) {
      iWeekOfMonth++;
      bNewWeek = false;
    }
    pDateInfo->rect.Set(
        fLeft + pDateInfo->iDayOfWeek * (m_szCell.x + (MONTHCAL_HMARGIN * 2)),
        fTop + iWeekOfMonth * (m_szCell.y + (MONTHCAL_VMARGIN * 2)),
        m_szCell.x + (MONTHCAL_HMARGIN * 2),
        m_szCell.y + (MONTHCAL_VMARGIN * 2));
    if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_MCD_WeekNumbers)
      pDateInfo->rect.Offset(m_fWeekNumWid, 0);
    if (pDateInfo->iDayOfWeek >= 6)
      bNewWeek = true;
  }
}

void IFWL_MonthCalendar::GetCapValue() {
  if (!m_pProperties->m_pThemeProvider)
    m_pProperties->m_pThemeProvider = GetAvailableTheme();

  IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
  CFWL_ThemePart part;
  part.m_pWidget = this;
  m_fHeadWid = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::HeaderWidth));
  m_fHeadHei = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::HeaderHeight));
  m_fHeadBtnWid = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::HeaderBtnWidth));
  m_fHeadBtnHei = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::HeaderBtnHeight));
  m_fHeadBtnHMargin = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::HeaderBtnHMargin));
  m_fHeadBtnVMargin = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::HeaderBtnVMargin));
  m_fHeadTextWid = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::HeaderTextWidth));
  m_fHeadTextHei = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::HeaderTextHeight));
  m_fHeadTextHMargin = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::HeaderTextHMargin));
  m_fHeadTextVMargin = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::HeaderTextVMargin));
  m_fHSepWid = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::HSepWidth));
  m_fHSepHei = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::HSepHeight));
  m_fWeekNumWid = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::WeekNumWidth));
  m_fSepDOffset = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::SepDOffset));
  m_fSepX = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::SepX));
  m_fSepY = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::SepY));
  m_fWeekNumHeigh = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::WeekNumHeight));
  m_fWeekWid = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::WeekWidth));
  m_fWeekHei = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::WeekHeight));
  m_fDateCellWid = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::DatesCellWidth));
  m_fDateCellHei = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::DatesCellHeight));
  m_fTodayWid = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::TodayWidth));
  m_fTodayHei = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::TodayHeight));
  m_fTodayFlagWid = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::TodayFlagWidth));
  m_fMCWid = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::Width));
  if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_MCD_WeekNumbers)
    m_fMCWid += m_fWeekNumWid;

  m_fMCHei = *static_cast<FX_FLOAT*>(
      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::Height));
}

void IFWL_MonthCalendar::InitDate() {
  if (m_pProperties->m_pDataProvider) {
    IFWL_MonthCalendar::DataProvider* pDateProv =
        static_cast<IFWL_MonthCalendar::DataProvider*>(
            m_pProperties->m_pDataProvider);
    m_iYear = pDateProv->GetCurYear(this);
    m_iMonth = pDateProv->GetCurMonth(this);
    m_iDay = pDateProv->GetCurDay(this);
    m_iCurYear = m_iYear;
    m_iCurMonth = m_iMonth;
  } else {
    m_iDay = 1;
    m_iMonth = 1;
    m_iYear = 1;
    m_iCurYear = m_iYear;
    m_iCurMonth = m_iMonth;
  }
  GetTodayText(m_iYear, m_iMonth, m_iDay, m_wsToday);
  GetHeadText(m_iCurYear, m_iCurMonth, m_wsHead);
  m_dtMin = DATE(1500, 12, 1);
  m_dtMax = DATE(2200, 1, 1);
}

void IFWL_MonthCalendar::ClearDateItem() {
  for (int32_t i = 0; i < m_arrDates.GetSize(); i++)
    delete m_arrDates.GetAt(i);
  m_arrDates.RemoveAll();
}

void IFWL_MonthCalendar::ResetDateItem() {
  m_pDateTime->Set(m_iCurYear, m_iCurMonth, 1);
  int32_t iDays = FX_DaysInMonth(m_iCurYear, m_iCurMonth);
  int32_t iDayOfWeek = m_pDateTime->GetDayOfWeek();
  for (int32_t i = 0; i < iDays; i++) {
    if (iDayOfWeek >= 7)
      iDayOfWeek = 0;

    CFX_WideString wsDay;
    wsDay.Format(L"%d", i + 1);
    uint32_t dwStates = 0;
    if (m_iYear == m_iCurYear && m_iMonth == m_iCurMonth && m_iDay == (i + 1))
      dwStates |= FWL_ITEMSTATE_MCD_Flag;
    if (m_arrSelDays.Find(i + 1) != -1)
      dwStates |= FWL_ITEMSTATE_MCD_Selected;

    CFX_RectF rtDate;
    rtDate.Set(0, 0, 0, 0);
    m_arrDates.Add(new DATEINFO(i + 1, iDayOfWeek, dwStates, rtDate, wsDay));
    iDayOfWeek++;
  }
}

void IFWL_MonthCalendar::NextMonth() {
  int32_t iYear = m_iCurYear, iMonth = m_iCurMonth;
  if (iMonth >= 12) {
    iMonth = 1;
    iYear++;
  } else {
    iMonth++;
  }
  DATE dt(m_iCurYear, m_iCurMonth, 1);
  if (!(dt < m_dtMax))
    return;

  m_iCurYear = iYear, m_iCurMonth = iMonth;
  ChangeToMonth(m_iCurYear, m_iCurMonth);
}

void IFWL_MonthCalendar::PrevMonth() {
  int32_t iYear = m_iCurYear, iMonth = m_iCurMonth;
  if (iMonth <= 1) {
    iMonth = 12;
    iYear--;
  } else {
    iMonth--;
  }

  DATE dt(m_iCurYear, m_iCurMonth, 1);
  if (!(dt > m_dtMin))
    return;

  m_iCurYear = iYear, m_iCurMonth = iMonth;
  ChangeToMonth(m_iCurYear, m_iCurMonth);
}

void IFWL_MonthCalendar::ChangeToMonth(int32_t iYear, int32_t iMonth) {
  m_iCurYear = iYear;
  m_iCurMonth = iMonth;
  m_iHovered = -1;

  ClearDateItem();
  ResetDateItem();
  CalDateItem();
  GetHeadText(m_iCurYear, m_iCurMonth, m_wsHead);
}

void IFWL_MonthCalendar::RemoveSelDay(int32_t iDay, bool bAll) {
  if (iDay == -1 && !bAll)
    return;
  if (bAll) {
    int32_t iCount = m_arrSelDays.GetSize();
    int32_t iDatesCount = m_arrDates.GetSize();
    for (int32_t i = 0; i < iCount; i++) {
      int32_t iSelDay = m_arrSelDays.GetAt(i);
      if (iSelDay <= iDatesCount) {
        DATEINFO* pDateInfo = m_arrDates.GetAt(iSelDay - 1);
        pDateInfo->dwStates &= ~FWL_ITEMSTATE_MCD_Selected;
      }
    }
    m_arrSelDays.RemoveAll();
    return;
  }

  int32_t index = m_arrSelDays.Find(iDay);
  if (index == -1)
    return;

  int32_t iSelDay = m_arrSelDays.GetAt(iDay);
  int32_t iDatesCount = m_arrDates.GetSize();
  if (iSelDay <= iDatesCount) {
    DATEINFO* pDateInfo = m_arrDates.GetAt(iSelDay - 1);
    pDateInfo->dwStates &= ~FWL_ITEMSTATE_MCD_Selected;
  }
  m_arrSelDays.RemoveAt(index);
}

void IFWL_MonthCalendar::AddSelDay(int32_t iDay) {
  ASSERT(iDay > 0);
  if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_MCD_MultiSelect)
    return;

  if (m_arrSelDays.Find(iDay) != -1)
    return;

  RemoveSelDay(-1, true);
  if (iDay <= m_arrDates.GetSize()) {
    DATEINFO* pDateInfo = m_arrDates.GetAt(iDay - 1);
    pDateInfo->dwStates |= FWL_ITEMSTATE_MCD_Selected;
  }
  m_arrSelDays.Add(iDay);
}

void IFWL_MonthCalendar::JumpToToday() {
  if (m_iYear != m_iCurYear || m_iMonth != m_iCurMonth) {
    m_iCurYear = m_iYear;
    m_iCurMonth = m_iMonth;
    ChangeToMonth(m_iYear, m_iMonth);
    AddSelDay(m_iDay);
    return;
  }

  if (m_arrSelDays.Find(m_iDay) == -1)
    AddSelDay(m_iDay);
}

void IFWL_MonthCalendar::GetHeadText(int32_t iYear,
                                     int32_t iMonth,
                                     CFX_WideString& wsHead) {
  ASSERT(iMonth > 0 && iMonth < 13);
  static const FX_WCHAR* const pMonth[] = {
      L"January",   L"February", L"March",    L"April",
      L"May",       L"June",     L"July",     L"August",
      L"September", L"October",  L"November", L"December"};
  wsHead.Format(L"%s, %d", pMonth[iMonth - 1], iYear);
}

void IFWL_MonthCalendar::GetTodayText(int32_t iYear,
                                      int32_t iMonth,
                                      int32_t iDay,
                                      CFX_WideString& wsToday) {
  wsToday.Format(L", %d/%d/%d", iDay, iMonth, iYear);
}

int32_t IFWL_MonthCalendar::GetDayAtPoint(FX_FLOAT x, FX_FLOAT y) {
  int32_t iCount = m_arrDates.GetSize();
  for (int32_t i = 0; i < iCount; i++) {
    DATEINFO* pDateInfo = m_arrDates.GetAt(i);
    if (pDateInfo->rect.Contains(x, y))
      return ++i;
  }
  return -1;
}

void IFWL_MonthCalendar::GetDayRect(int32_t iDay, CFX_RectF& rtDay) {
  if (iDay <= 0 || iDay > m_arrDates.GetSize())
    return;

  DATEINFO* pDateInfo = m_arrDates[iDay - 1];
  if (!pDateInfo)
    return;
  rtDay = pDateInfo->rect;
}

void IFWL_MonthCalendar::OnProcessMessage(CFWL_Message* pMessage) {
  if (!pMessage)
    return;

  CFWL_MessageType dwMsgCode = pMessage->GetClassID();
  switch (dwMsgCode) {
    case CFWL_MessageType::SetFocus:
    case CFWL_MessageType::KillFocus:
      GetOuter()->GetDelegate()->OnProcessMessage(pMessage);
      break;
    case CFWL_MessageType::Key:
      break;
    case CFWL_MessageType::Mouse: {
      CFWL_MsgMouse* pMouse = static_cast<CFWL_MsgMouse*>(pMessage);
      switch (pMouse->m_dwCmd) {
        case FWL_MouseCommand::LeftButtonDown:
          OnLButtonDown(pMouse);
          break;
        case FWL_MouseCommand::LeftButtonUp:
          OnLButtonUp(pMouse);
          break;
        case FWL_MouseCommand::Move:
          OnMouseMove(pMouse);
          break;
        case FWL_MouseCommand::Leave:
          OnMouseLeave(pMouse);
          break;
        default:
          break;
      }
      break;
    }
    default:
      break;
  }
  IFWL_Widget::OnProcessMessage(pMessage);
}

void IFWL_MonthCalendar::OnDrawWidget(CFX_Graphics* pGraphics,
                                      const CFX_Matrix* pMatrix) {
  DrawWidget(pGraphics, pMatrix);
}

void IFWL_MonthCalendar::OnLButtonDown(CFWL_MsgMouse* pMsg) {
  if (m_rtLBtn.Contains(pMsg->m_fx, pMsg->m_fy)) {
    m_iLBtnPartStates = CFWL_PartState_Pressed;
    PrevMonth();
    Repaint(&m_rtClient);
  } else if (m_rtRBtn.Contains(pMsg->m_fx, pMsg->m_fy)) {
    m_iRBtnPartStates |= CFWL_PartState_Pressed;
    NextMonth();
    Repaint(&m_rtClient);
  } else if (m_rtToday.Contains(pMsg->m_fx, pMsg->m_fy)) {
    if ((m_pProperties->m_dwStyleExes & FWL_STYLEEXT_MCD_NoToday) == 0) {
      JumpToToday();
      Repaint(&m_rtClient);
    }
  } else {
    IFWL_DateTimePicker* pIPicker = static_cast<IFWL_DateTimePicker*>(m_pOuter);
    if (pIPicker->IsMonthCalendarVisible())
      m_bFlag = 1;
  }
}

void IFWL_MonthCalendar::OnLButtonUp(CFWL_MsgMouse* pMsg) {
  if (m_pWidgetMgr->IsFormDisabled())
    return DisForm_OnLButtonUp(pMsg);

  if (m_rtLBtn.Contains(pMsg->m_fx, pMsg->m_fy)) {
    m_iLBtnPartStates = 0;
    Repaint(&m_rtLBtn);
    return;
  }
  if (m_rtRBtn.Contains(pMsg->m_fx, pMsg->m_fy)) {
    m_iRBtnPartStates = 0;
    Repaint(&m_rtRBtn);
    return;
  }
  if (m_rtToday.Contains(pMsg->m_fx, pMsg->m_fy))
    return;

  int32_t iOldSel = 0;
  if (m_arrSelDays.GetSize() > 0)
    iOldSel = m_arrSelDays[0];

  int32_t iCurSel = GetDayAtPoint(pMsg->m_fx, pMsg->m_fy);
  CFX_RectF rt;
  IFWL_DateTimePicker* pIPicker = static_cast<IFWL_DateTimePicker*>(m_pOuter);
  pIPicker->GetFormProxy()->GetWidgetRect(rt);
  rt.Set(0, 0, rt.width, rt.height);
  if (iCurSel > 0) {
    DATEINFO* lpDatesInfo = m_arrDates.GetAt(iCurSel - 1);
    CFX_RectF rtInvalidate(lpDatesInfo->rect);
    if (iOldSel > 0 && iOldSel <= m_arrDates.GetSize()) {
      lpDatesInfo = m_arrDates.GetAt(iOldSel - 1);
      rtInvalidate.Union(lpDatesInfo->rect);
    }
    AddSelDay(iCurSel);
    if (!m_pOuter)
      return;

    pIPicker->ProcessSelChanged(m_iCurYear, m_iCurMonth, iCurSel);
    pIPicker->ShowMonthCalendar(false);
  } else if (m_bFlag && (!rt.Contains(pMsg->m_fx, pMsg->m_fy))) {
    pIPicker->ShowMonthCalendar(false);
  }
  m_bFlag = 0;
}

void IFWL_MonthCalendar::DisForm_OnLButtonUp(CFWL_MsgMouse* pMsg) {
  if (m_rtLBtn.Contains(pMsg->m_fx, pMsg->m_fy)) {
    m_iLBtnPartStates = 0;
    Repaint(&(m_rtLBtn));
    return;
  }
  if (m_rtRBtn.Contains(pMsg->m_fx, pMsg->m_fy)) {
    m_iRBtnPartStates = 0;
    Repaint(&(m_rtRBtn));
    return;
  }
  if (m_rtToday.Contains(pMsg->m_fx, pMsg->m_fy))
    return;

  int32_t iOldSel = 0;
  if (m_arrSelDays.GetSize() > 0)
    iOldSel = m_arrSelDays[0];

  int32_t iCurSel = GetDayAtPoint(pMsg->m_fx, pMsg->m_fy);
  if (iCurSel > 0) {
    DATEINFO* lpDatesInfo = m_arrDates.GetAt(iCurSel - 1);
    CFX_RectF rtInvalidate(lpDatesInfo->rect);
    if (iOldSel > 0 && iOldSel <= m_arrDates.GetSize()) {
      lpDatesInfo = m_arrDates.GetAt(iOldSel - 1);
      rtInvalidate.Union(lpDatesInfo->rect);
    }
    AddSelDay(iCurSel);
    IFWL_DateTimePicker* pDateTime =
        static_cast<IFWL_DateTimePicker*>(m_pOuter);
    pDateTime->ProcessSelChanged(m_iCurYear, m_iCurMonth, iCurSel);
    pDateTime->ShowMonthCalendar(false);
  }
}

void IFWL_MonthCalendar::OnMouseMove(CFWL_MsgMouse* pMsg) {
  if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_MCD_MultiSelect)
    return;

  bool bRepaint = false;
  CFX_RectF rtInvalidate;
  rtInvalidate.Set(0, 0, 0, 0);
  if (m_rtDates.Contains(pMsg->m_fx, pMsg->m_fy)) {
    int32_t iHover = GetDayAtPoint(pMsg->m_fx, pMsg->m_fy);
    bRepaint = m_iHovered != iHover;
    if (bRepaint) {
      if (m_iHovered > 0)
        GetDayRect(m_iHovered, rtInvalidate);
      if (iHover > 0) {
        CFX_RectF rtDay;
        GetDayRect(iHover, rtDay);
        if (rtInvalidate.IsEmpty())
          rtInvalidate = rtDay;
        else
          rtInvalidate.Union(rtDay);
      }
    }
    m_iHovered = iHover;
  } else {
    bRepaint = m_iHovered > 0;
    if (bRepaint)
      GetDayRect(m_iHovered, rtInvalidate);

    m_iHovered = -1;
  }
  if (bRepaint && !rtInvalidate.IsEmpty())
    Repaint(&rtInvalidate);
}

void IFWL_MonthCalendar::OnMouseLeave(CFWL_MsgMouse* pMsg) {
  if (m_iHovered <= 0)
    return;

  CFX_RectF rtInvalidate;
  rtInvalidate.Set(0, 0, 0, 0);
  GetDayRect(m_iHovered, rtInvalidate);
  m_iHovered = -1;
  if (!rtInvalidate.IsEmpty())
    Repaint(&rtInvalidate);
}

IFWL_MonthCalendar::DATEINFO::DATEINFO(int32_t day,
                                       int32_t dayofweek,
                                       uint32_t dwSt,
                                       CFX_RectF rc,
                                       CFX_WideString& wsday)
    : iDay(day),
      iDayOfWeek(dayofweek),
      dwStates(dwSt),
      rect(rc),
      wsDay(wsday) {}

IFWL_MonthCalendar::DATEINFO::~DATEINFO() {}