{
   Double Commander
   -------------------------------------------------------------------------
   Directories synchronization utility (specially for DC)

   Copyright (C) 2013 Anton Panferov (ast.a_s@mail.ru)
   Copyright (C) 2014-2024 Alexander Koblov (alexx2000@mail.ru)

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program. If not, see <http://www.gnu.org/licenses/>.
}

unit fSyncDirsDlg;

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, StdCtrls,
  ExtCtrls, Buttons, ComCtrls, Grids, Menus, ActnList, EditBtn, DCClassesUtf8,
  uFileView, uFileSource, uFileSourceCopyOperation, uFile, uFileSourceOperation,
  uFileSourceOperationMessageBoxesUI, uFormCommands, uHotkeyManager, uClassesEx,
  uFileSourceDeleteOperation, KASProgressBar;

const
  HotkeysCategory = 'Synchronize Directories';

type

  TSyncRecState = (srsUnknown, srsEqual, srsNotEq, srsCopyLeft, srsCopyRight, srsDeleteLeft,
    srsDeleteRight, srsDeleteBoth, srsDoNothing);

  { TDrawGrid }

  TDrawGrid = class(Grids.TDrawGrid)
  protected
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Integer); override;
  end;

  { TfrmSyncDirsDlg }

  TfrmSyncDirsDlg = class(TForm, IFormCommands)
    actDeleteLeft: TAction;
    actDeleteRight: TAction;
    actDeleteBoth: TAction;
    actSelectDeleteLeft: TAction;
    actSelectDeleteRight: TAction;
    actSelectDeleteBoth: TAction;
    actSelectCopyReverse: TAction;
    actSelectClear: TAction;
    actSelectCopyLeftToRight: TAction;
    actSelectCopyRightToLeft: TAction;
    actSelectCopyDefault: TAction;
    ActionList: TActionList;
    btnAbort: TBitBtn;
    btnCompare: TButton;
    btnSynchronize: TButton;
    btnClose: TButton;
    chkAsymmetric: TCheckBox;
    chkSubDirs: TCheckBox;
    chkByContent: TCheckBox;
    chkIgnoreDate: TCheckBox;
    chkOnlySelected: TCheckBox;
    cbExtFilter: TComboBox;
    edPath1: TDirectoryEdit;
    edPath2: TDirectoryEdit;
    HeaderDG: TDrawGrid;
    lblProgress: TLabel;
    lblProgressDelete: TLabel;
    MainDrawGrid: TDrawGrid;
    GroupBox1: TGroupBox;
    ImageList1: TImageList;
    Label1: TLabel;
    LeftPanel1: TPanel;
    LeftPanel2: TPanel;
    miDeleteBoth: TMenuItem;
    miDeleteRight: TMenuItem;
    miDeleteLeft: TMenuItem;
    miSeparator3: TMenuItem;
    miSelectDeleteLeft: TMenuItem;
    miSelectDeleteRight: TMenuItem;
    miSelectDeleteBoth: TMenuItem;
    miSeparator2: TMenuItem;
    miSelectCopyReverse: TMenuItem;
    miSeparator1: TMenuItem;
    miSelectCopyLeftToRight: TMenuItem;
    miSelectCopyRightToLeft: TMenuItem;
    miSelectCopyDefault: TMenuItem;
    miSelectClear: TMenuItem;
    MenuItemCompare: TMenuItem;
    MenuItemViewRight: TMenuItem;
    MenuItemViewLeft: TMenuItem;
    pnlFilter: TPanel;
    pnlProgress: TPanel;
    pnlCopyProgress: TPanel;
    pnlDeleteProgress: TPanel;
    pmGridMenu: TPopupMenu;
    ProgressBar: TKASProgressBar;
    ProgressBarDelete: TKASProgressBar;
    sbCopyRight: TSpeedButton;
    sbEqual: TSpeedButton;
    sbNotEqual: TSpeedButton;
    sbUnknown: TSpeedButton;
    sbCopyLeft: TSpeedButton;
    sbDuplicates: TSpeedButton;
    sbSingles: TSpeedButton;
    btnSearchTemplate: TSpeedButton;
    StatusBar1: TStatusBar;
    Timer: TTimer;
    TopPanel: TPanel;
    procedure actExecute(Sender: TObject);
    procedure btnAbortClick(Sender: TObject);
    procedure btnCloseClick(Sender: TObject);
    procedure btnSearchTemplateClick(Sender: TObject);
    procedure btnCompareClick(Sender: TObject);
    procedure btnSynchronizeClick(Sender: TObject);
    procedure edPath1AcceptDirectory(Sender: TObject; var Value: String);
    procedure RestoreProperties(Sender: TObject);
    procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
    procedure FormCloseQuery(Sender: TObject; var CanClose: boolean);
    procedure FormCreate(Sender: TObject);
    procedure FormResize(Sender: TObject);
    procedure MainDrawGridDblClick(Sender: TObject);
    procedure MainDrawGridDrawCell(Sender: TObject; aCol, aRow: Integer;
      aRect: TRect; aState: TGridDrawState);
    procedure MainDrawGridKeyDown(Sender: TObject; var Key: Word;
      Shift: TShiftState);
    procedure MainDrawGridMouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure FormKeyDown(Sender: TObject; var Key: Word; Shift: TShiftState);
    procedure HeaderDGHeaderClick(Sender: TObject; IsColumn: Boolean;
      Index: Integer);
    procedure HeaderDGHeaderSizing(sender: TObject; const IsColumn: boolean;
      const aIndex, aSize: Integer);
    procedure FilterSpeedButtonClick(Sender: TObject);
    procedure MenuItemViewClick(Sender: TObject);
    procedure pmGridMenuPopup(Sender: TObject);
    procedure TimerTimer(Sender: TObject);
  private
    FCommands: TFormCommands;
    FIniPropStorage: TIniPropStorageEx;
  private
    { private declarations }
    FCancel: Boolean;
    FScanning: Boolean;
    FComparing: Boolean;
    FFoundItems: TStringListEx;
    FVisibleItems: TStringListEx;
    FSortIndex: Integer;
    FSortDesc: Boolean;
    FNtfsShift: Boolean;
    FFileExists: TSyncRecState;
    FSelectedItems: TStringListEx;
    FFileSourceL, FFileSourceR: IFileSource;
    FCmpFileSourceL, FCmpFileSourceR: IFileSource;
    FCmpFilePathL, FCmpFilePathR: string;
    FAddressL, FAddressR: string;
    hCols: array [0..6] of record Left, Width: Integer end;
    CheckContentThread: TObject;
    Ftotal, Fequal, Fnoneq, FuniqueL, FuniqueR: Integer;
    FOperation: TFileSourceOperation;
    FCopyStatistics: TFileSourceCopyOperationStatistics;
    FDeleteStatistics: TFileSourceDeleteOperationStatistics;
    FFileSourceOperationMessageBoxesUI: TFileSourceOperationMessageBoxesUI;
    procedure ClearFoundItems;
    procedure Compare;
    procedure FillFoundItemsDG;
    procedure InitVisibleItems;
    procedure RecalcHeaderCols;
    procedure ScanDirs;
    procedure SetSortIndex(AValue: Integer);
    procedure SortFoundItems;
    procedure SortFoundItems(sl: TStringList);
    procedure UpdateStatusBar;
    procedure StopCheckContentThread;
    procedure UpdateSelection(R: Integer);
    procedure EnableControls(AEnabled: Boolean);
    procedure SetSyncRecState(AState: TSyncRecState);
    procedure DeleteFiles(ALeft, ARight: Boolean);
    function DeleteFiles(FileSource: IFileSource; var Files: TFiles): Boolean;
    procedure UpdateList(ALeft, ARight: TFiles; ARemoveLeft, ARemoveRight: Boolean);
    procedure SetProgressBytes(AProgressBar: TKASProgressBar; CurrentBytes: Int64; TotalBytes: Int64);
    procedure SetProgressFiles(AProgressBar: TKASProgressBar; CurrentFiles: Int64; TotalFiles: Int64);
  private
    property SortIndex: Integer read FSortIndex write SetSortIndex;
    property Commands: TFormCommands read FCommands implements IFormCommands;
  protected
    procedure DoAutoAdjustLayout(const AMode: TLayoutAdjustmentPolicy;
                                 const AXProportion, AYProportion: Double); override;
  public
    { public declarations }
    constructor Create(AOwner: TComponent;
      FileView1, FileView2: TFileView); reintroduce;
    destructor Destroy; override;
  public
    procedure CopyToClipboard;
  published
    procedure cm_SelectClear(const {%H-}Params:array of string);
    procedure cm_SelectDeleteLeft(const {%H-}Params:array of string);
    procedure cm_SelectDeleteRight(const {%H-}Params:array of string);
    procedure cm_SelectDeleteBoth(const {%H-}Params:array of string);
    procedure cm_SelectCopyDefault(const {%H-}Params:array of string);
    procedure cm_SelectCopyReverse(const {%H-}Params:array of string);
    procedure cm_SelectCopyLeftToRight(const {%H-}Params:array of string);
    procedure cm_SelectCopyRightToLeft(const {%H-}Params:array of string);


    procedure cm_DeleteLeft(const {%H-}Params:array of string);
    procedure cm_DeleteRight(const {%H-}Params:array of string);
    procedure cm_DeleteBoth(const {%H-}Params:array of string);
  end;

resourcestring
  rsComparingPercent = 'Comparing... %d%% (ESC to cancel)';
  rsLeftToRightCopy = 'Left to Right: Copy %d files, total size: %s (%s)';
  rsRightToLeftCopy = 'Right to Left: Copy %d files, total size: %s (%s)';
  rsDeleteLeft = 'Left: Delete %d file(s)';
  rsDeleteRight = 'Right: Delete %d file(s)';
  rsFilesFound = 'Files found: %d  (Identical: %d, Different: %d, '
    + 'Unique left: %d, Unique right: %d)';

procedure ShowSyncDirsDlg(FileView1, FileView2: TFileView);

implementation

uses
  fMain, uDebug, fDiffer, fSyncDirsPerformDlg, uGlobs, LCLType, LazUTF8, LazFileUtils,
  uFileSystemFileSource, uFileSourceOperationOptions, DCDateTimeUtils, SyncObjs,
  uDCUtils, uFileSourceUtil, uFileSourceOperationTypes, uShowForm, uAdministrator,
  uOSUtils, uLng, uMasks, Math, uClipboard, IntegerList, fMaskInputDlg, uSearchTemplate,
  SysConst, DCStrUtils, uTypes, uFileSystemDeleteOperation, uFindFiles;

{$R *.lfm}

const
  GRID_COLUMN_FMT = 'HeaderDG_Column%d_Width';

type

  { TFileSyncRec }

  TFileSyncRec = class
  private
    FRelPath: string;
    FState: TSyncRecState;
    FAction: TSyncRecState;
    FFileR, FFileL: TFile;
    FForm: TfrmSyncDirsDlg;
  public
    constructor Create(AForm: TfrmSyncDirsDlg; RelPath: string);
    destructor Destroy; override;
    procedure UpdateState(ignoreDate: Boolean);
  end;

  { TCheckContentThread }

  TCheckContentThread = class(TThread)
  private
    FDone: Boolean;
    FTimer: Integer;
    FOwner: TfrmSyncDirsDlg;
    FMutex: TCriticalSection;
    FStatistics: TFileSourceCopyOperationStatistics;
  private
    procedure DoStart;
    procedure DoFinish;
    procedure UpdateGrid;
    procedure ReapplyFilter;
  protected
    procedure Execute; override;
    function RetrieveStatistics: TFileSourceCopyOperationStatistics;
    procedure UpdateStatistics(var NewStatistics: TFileSourceCopyOperationStatistics);
    procedure SetProgressBytes(AProgressBar: TKASProgressBar; CurrentBytes: Int64; TotalBytes: Int64);
  public
    constructor Create(Owner: TfrmSyncDirsDlg);
    destructor Destroy; override;
    property Done: Boolean read FDone;
  end;

procedure ShowSyncDirsDlg(FileView1, FileView2: TFileView);
begin
  if not Assigned(FileView1) then
    raise Exception.Create('ShowSyncDirsDlg: FileView1=nil');
  if not Assigned(FileView2) then
    raise Exception.Create('ShowSyncDirsDlg: FileView2=nil');
  with TfrmSyncDirsDlg.Create(Application, FileView1, FileView2) do
    Show;
end;

{ TDrawGrid }

procedure TDrawGrid.MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
var
  C, R: Integer;
begin
  if Button <> mbRight then
    inherited MouseDown(Button, Shift, X, Y)
  else begin
    MouseToCell(X, Y, {%H-}C, {%H-}R);
    if (R >= 0) and (R < RowCount) then
    begin
      if not IsCellSelected[Col, R] then
        MoveExtend(False, Col, R, False)
      else begin
        C:= Row;
        PInteger(@Row)^:= R;
        InvalidateRow(C);
        InvalidateRow(R);
      end;
    end;
  end;
end;

{ TCheckContentThread }

procedure TCheckContentThread.DoStart;
begin
  with FOwner do
  begin
    Timer.Enabled:= True;
    HeaderDG.Enabled:= False;
    GroupBox1.Enabled:= False;
    MainDrawGrid.Enabled:= False;
    pnlCopyProgress.Visible:= True;
    ProgressBar.SetProgress(0, 100);
    pnlDeleteProgress.Visible:= False;
    lblProgress.Caption:= rsDiffComparing;
  end;
  FOwner.pnlProgress.Visible:= True;
end;

procedure TCheckContentThread.DoFinish;
begin
  FOwner.FComparing:= False;
  FOwner.Timer.Enabled:= False;
  FOwner.HeaderDG.Enabled:= True;
  FOwner.TopPanel.Enabled:= True;
  FOwner.GroupBox1.Enabled:= True;
  FOwner.MainDrawGrid.Enabled:= True;
  FOwner.pnlProgress.Visible:= False;
end;

procedure TCheckContentThread.UpdateGrid;
begin
  FOwner.MainDrawGrid.Invalidate;
  FOwner.UpdateStatusBar;
end;

procedure TCheckContentThread.ReapplyFilter;
begin
  FOwner.FillFoundItemsDG;
  FOwner.UpdateStatusBar;
end;

procedure TCheckContentThread.Execute;
const
  BUF_LEN = 1024 * 1024;
var
  Buffer1, Buffer2: PByte;
  Statistics: TFileSourceCopyOperationStatistics;

  function CompareFiles(const FileName1, FileName2: String; Size: Int64): Boolean;
  var
    DoneBytes, Count: Int64;
    File1, File2: TFileStreamEx;
  begin
    File1 := TFileStreamEx.Create(FileName1, fmOpenRead or fmShareDenyWrite);
    try
      File2 := TFileStreamEx.Create(FileName2, fmOpenRead or fmShareDenyWrite);
      try
        DoneBytes := 0;

        repeat
          if Size - DoneBytes <= BUF_LEN then
            Count := Size - DoneBytes
          else begin
            Count := BUF_LEN;
          end;

          File1.ReadBuffer(Buffer1^, Count);
          File2.ReadBuffer(Buffer2^, Count);

          if (Count <> BUF_LEN) then
            Result := CompareByte(Buffer1^, Buffer2^, Count) = 0
          else begin
            Result := CompareDWord(Buffer1^, Buffer2^, Count div SizeOf(Dword)) = 0;
          end;

          Statistics.DoneBytes += Count;
          DoneBytes := DoneBytes + Count;

          UpdateStatistics(Statistics);

        until Terminated or not Result or (DoneBytes >= Size);
      finally
        File2.Free;
      end;
    finally
      File1.Free;
    end;
  end;

var
  B: Boolean;
  I, J: Integer;
  R: TFileSyncRec;
begin
  Synchronize(@DoStart);
  Buffer1:= GetMem(BUF_LEN);
  Buffer2:= GetMem(BUF_LEN);
  try
    if (Buffer1 = nil) or (Buffer2 = nil) then
      raise EOutOfMemory.Create(SOutOfMemory);

    with FOwner do
    begin
      Statistics.DoneBytes:= 0;
      Statistics.TotalBytes:= 0;
      for I := 0 to FFoundItems.Count - 1 do
      begin
        for J := 0 to TStringList(FFoundItems.Objects[I]).Count - 1 do
        begin
          if Terminated then Exit;
          R := TFileSyncRec(TStringList(FFoundItems.Objects[I]).Objects[J]);
          if Assigned(R) and (R.FState = srsUnknown) then
          begin
            Statistics.TotalBytes+= R.FFileL.Size;
          end;
        end;
      end;
      UpdateStatistics(Statistics);
    end;

    with FOwner do
    for I := 0 to FFoundItems.Count - 1 do
    begin
      for J := 0 to TStringList(FFoundItems.Objects[I]).Count - 1 do
      begin
        if Terminated then Exit;
        R := TFileSyncRec(TStringList(FFoundItems.Objects[I]).Objects[J]);
        if Assigned(R) and (R.FState = srsUnknown) then
        begin
          try
            B:= CompareFiles(R.FFileL.FullPath, R.FFileR.FullPath, R.FFileL.Size);
            if Terminated then Exit;
            if B then
            begin
              Inc(Fequal);
              Dec(Fnoneq);
              R.FState := srsEqual
            end
            else begin
              R.FState := srsNotEq;
            end;
            if R.FAction = srsUnknown then
            begin
              R.FAction := R.FState;
            end;
          except
            on E: Exception do
              DCDebug('[SyncDirs::CmpContentThread] ' + E.Message);
          end;
        end;
      end;
    end;
    FDone := True;
    Synchronize(@ReapplyFilter);
  finally
    Synchronize(@DoFinish);
    if Assigned(Buffer1) then FreeMem(Buffer1);
    if Assigned(Buffer2) then FreeMem(Buffer2);
  end;
end;

function TCheckContentThread.RetrieveStatistics: TFileSourceCopyOperationStatistics;
begin
  FMutex.Acquire;
  try
    Result := Self.FStatistics;
  finally
    FMutex.Release;
  end;
end;

procedure TCheckContentThread.UpdateStatistics(var NewStatistics: TFileSourceCopyOperationStatistics);
begin
  FMutex.Acquire;
  try
    FStatistics := NewStatistics;
  finally
    FMutex.Release;
  end;
end;

procedure TCheckContentThread.SetProgressBytes(AProgressBar: TKASProgressBar;
  CurrentBytes: Int64; TotalBytes: Int64);
var
  BarText : String;
begin
  BarText := cnvFormatFileSize(CurrentBytes, uoscOperation) + '/' + cnvFormatFileSize(TotalBytes, uoscOperation);
  AProgressBar.SetProgress(CurrentBytes, TotalBytes, BarText );
end;

constructor TCheckContentThread.Create(Owner: TfrmSyncDirsDlg);
begin
  FOwner := Owner;
  FMutex := TCriticalSection.Create;
  inherited Create(False);
end;

destructor TCheckContentThread.Destroy;
begin
  inherited Destroy;
  FMutex.Free;
end;

{ TFileSyncRec }

constructor TFileSyncRec.Create(AForm: TfrmSyncDirsDlg; RelPath: string);
begin
  FForm:= AForm;
  FRelPath := RelPath;
end;

destructor TFileSyncRec.Destroy;
begin
  FreeAndNil(FFileL);
  FreeAndNil(FFileR);
  inherited Destroy;
end;

procedure TFileSyncRec.UpdateState(ignoreDate: Boolean);
var
  FileTimeDiff: Integer;
begin
  FState := srsNotEq;
  if Assigned(FFileR) and not Assigned(FFileL) then
    FState := FForm.FFileExists
  else
  if not Assigned(FFileR) and Assigned(FFileL) then
    FState := srsCopyRight
  else begin
    FileTimeDiff := FileTimeCompare(FFileL.ModificationTime, FFileR.ModificationTime, FForm.FNtfsShift);
    if ((FileTimeDiff = 0) or ignoreDate) and (FFileL.Size = FFileR.Size) then
      FState := srsEqual
    else
    if not ignoreDate then
      if FileTimeDiff > 0 then
        FState := srsCopyRight
      else
      if FileTimeDiff < 0 then
        FState := srsCopyLeft;
  end;
  if FForm.chkAsymmetric.Checked and (FState = srsCopyLeft) then
    FAction := srsDoNothing
  else begin
    FAction := FState;
  end;
end;

{ TfrmSyncDirsDlg }

procedure TfrmSyncDirsDlg.actExecute(Sender: TObject);
var
  cmd: string;
begin
  cmd := (Sender as TAction).Name;
  cmd := 'cm_' + Copy(cmd, 4, Length(cmd) - 3);
  Commands.ExecuteCommand(cmd, []);
end;

procedure TfrmSyncDirsDlg.btnCloseClick(Sender: TObject);
begin
  Close
end;

procedure TfrmSyncDirsDlg.btnSearchTemplateClick(Sender: TObject);
var
  sMask: String;
  bTemplate: Boolean;
begin
  sMask:= cbExtFilter.Text;
  if ShowMaskInputDlg(rsMarkPlus, rsMaskInput, glsMaskHistory, sMask) then
  begin
    bTemplate:= IsMaskSearchTemplate(sMask);
    cbExtFilter.Enabled:= not bTemplate;
    cbExtFilter.Text:= sMask;
  end;
end;

procedure TfrmSyncDirsDlg.btnAbortClick(Sender: TObject);
begin
  if Assigned(FOperation) then
    FOperation.Stop
  else if FComparing then
    StopCheckContentThread
  else begin
    pnlProgress.Hide;
  end;
end;

procedure TfrmSyncDirsDlg.btnCompareClick(Sender: TObject);
begin
  if not IsMaskSearchTemplate(cbExtFilter.Text) then
    InsertFirstItem(Trim(cbExtFilter.Text), cbExtFilter);
  StatusBar1.Panels[0].Text := Format(rsComparingPercent, [0]);
  StopCheckContentThread;
  Compare;
end;

procedure TfrmSyncDirsDlg.btnSynchronizeClick(Sender: TObject);
var
  OperationType: TFileSourceOperationType;
  FileExistsOption: TFileSourceOperationOptionFileExists;
  SymLinkOption: TFileSourceOperationOptionSymLink = fsooslNone;

  function CopyFiles(src, dst: IFileSource; fs: TFiles; Dest: string): Boolean;
  begin
    if not GetCopyOperationType(Src, Dst, OperationType) then
    begin
      MessageDlg(rsMsgErrNotSupported, mtError, [mbOK], 0);
      Exit(False);
    end
    else begin
      Fs.Path:= fs[0].Path;
      // Create destination directory
      Dst.CreateDirectory(ExcludeBackPathDelimiter(Dest));
      // Determine operation type
      case OperationType of
        fsoCopy:
          begin
            // Copy within the same file source.
            FOperation := Src.CreateCopyOperation(
                           Fs,
                           Dest) as TFileSourceCopyOperation;
          end;
        fsoCopyOut:
          begin
            // CopyOut to filesystem.
            FOperation := Src.CreateCopyOutOperation(
                           Dst,
                           Fs,
                           Dest) as TFileSourceCopyOperation;
          end;
        fsoCopyIn:
          begin
            // CopyIn from filesystem.
            FOperation := Dst.CreateCopyInOperation(
                           Src,
                           Fs,
                           Dest) as TFileSourceCopyOperation;
          end;
      end;
      if not Assigned(FOperation) then
      begin
        MessageDlg(rsMsgErrNotSupported, mtError, [mbOK], 0);
        Exit(False);
      end;
      FOperation.Elevate:= ElevateAction;
      TFileSourceCopyOperation(FOperation).SymLinkOption := SymLinkOption;
      TFileSourceCopyOperation(FOperation).FileExistsOption := FileExistsOption;
      FOperation.AddUserInterface(FFileSourceOperationMessageBoxesUI);
      try
        FOperation.Execute;
        Result := FOperation.Result = fsorFinished;
        SymLinkOption := TFileSourceCopyOperation(FOperation).SymLinkOption;
        FileExistsOption := TFileSourceCopyOperation(FOperation).FileExistsOption;
        FCopyStatistics.DoneBytes+= TFileSourceCopyOperation(FOperation).RetrieveStatistics.TotalBytes;
        SetProgressBytes(ProgressBar, FCopyStatistics.DoneBytes, FCopyStatistics.TotalBytes);
      finally
        FreeAndNil(FOperation);
      end;
    end;
  end;

var
  i,
  DeleteLeftCount, DeleteRightCount,
  CopyLeftCount, CopyRightCount: Integer;
  CopyLeftSize, CopyRightSize: Int64;
  fsr: TFileSyncRec;
  DeleteLeft, DeleteRight,
  CopyLeft, CopyRight: Boolean;
  DeleteLeftFiles, DeleteRightFiles,
  CopyLeftFiles, CopyRightFiles: TFiles;
  Dest: string;
begin
  DeleteLeftCount := 0; DeleteRightCount := 0;
  CopyLeftCount := 0; CopyRightCount := 0;
  CopyLeftSize := 0;  CopyRightSize := 0;

  for i := 0 to FVisibleItems.Count - 1 do
    if Assigned(FVisibleItems.Objects[i]) then
    begin
      fsr := TFileSyncRec(FVisibleItems.Objects[i]);
      case fsr.FAction of
      srsCopyLeft:
        begin
          Inc(CopyLeftCount);
          Inc(CopyLeftSize, fsr.FFileR.Size);
        end;
      srsCopyRight:
        begin
          Inc(CopyRightCount);
          Inc(CopyRightSize, fsr.FFileL.Size);
        end;
      srsDeleteLeft:
        begin
          Inc(DeleteLeftCount);
        end;
      srsDeleteRight:
        begin
          Inc(DeleteRightCount);
        end;
      srsDeleteBoth:
        begin
          Inc(DeleteLeftCount);
          Inc(DeleteRightCount);
        end;
      end;
    end;
  FCopyStatistics.DoneBytes:= 0;
  FDeleteStatistics.DoneFiles:= 0;
  FCopyStatistics.TotalBytes:= CopyLeftSize + CopyRightSize;
  FDeleteStatistics.TotalFiles:= DeleteLeftCount + DeleteRightCount;

  with TfrmSyncDirsPerformDlg.Create(Self) do
  try
    edLeftPath.Text := FCmpFileSourceL.CurrentAddress + FCmpFilePathL;
    edRightPath.Text := FCmpFileSourceR.CurrentAddress + FCmpFilePathR;
    if (CopyLeftCount > 0) and
        GetCopyOperationType(FFileSourceR, FFileSourceL, OperationType) then
    begin
      chkRightToLeft.Enabled := True;
      chkRightToLeft.Checked := True;
      edLeftPath.Enabled := True;
    end;
    if (CopyRightCount > 0) and
        GetCopyOperationType(FFileSourceL, FFileSourceR, OperationType) then
    begin
      chkLeftToRight.Enabled := True;
      chkLeftToRight.Checked := True;
      edRightPath.Enabled := True;
    end;
    chkDeleteLeft.Enabled := DeleteLeftCount > 0;
    chkDeleteLeft.Checked := chkDeleteLeft.Enabled;
    chkDeleteRight.Enabled := DeleteRightCount > 0;
    chkDeleteRight.Checked := chkDeleteRight.Enabled;
    chkDeleteLeft.Caption := Format(rsDeleteLeft, [DeleteLeftCount]);
    chkDeleteRight.Caption := Format(rsDeleteRight, [DeleteRightCount]);
    chkLeftToRight.Caption :=
      Format(rsLeftToRightCopy, [CopyRightCount, cnvFormatFileSize(CopyRightSize, fsfFloat, gFileSizeDigits), IntToStrTS(CopyRightSize)]);
    chkRightToLeft.Caption :=
      Format(rsRightToLeftCopy, [CopyLeftCount, cnvFormatFileSize(CopyLeftSize, fsfFloat, gFileSizeDigits), IntToStrTS(CopyLeftSize)]);
    if ShowModal = mrOk then
    begin
      EnableControls(False);
      if chkConfirmOverwrites.Checked then
        FileExistsOption := fsoofeNone
      else begin
        FileExistsOption := fsoofeOverwrite;
      end;
      CopyLeft := chkRightToLeft.Checked;
      CopyRight := chkLeftToRight.Checked;
      DeleteLeft := chkDeleteLeft.Checked;
      DeleteRight := chkDeleteRight.Checked;

      lblProgress.Caption := rsOperCopying;
      lblProgressDelete.Caption := rsOperDeleting;
      ProgressBar.Position:=0;
      ProgressBarDelete.Position:=0;
      pnlCopyProgress.Visible:= CopyLeft or CopyRight;
      pnlDeleteProgress.Visible:= DeleteLeft or DeleteRight;

      i := 0;
      while i < FVisibleItems.Count do
      begin
        CopyLeftFiles := TFiles.Create('');
        CopyRightFiles := TFiles.Create('');
        DeleteLeftFiles := TFiles.Create('');
        DeleteRightFiles := TFiles.Create('');
        if FVisibleItems.Objects[i] <> nil then
          repeat
            fsr := TFileSyncRec(FVisibleItems.Objects[i]);
            Dest := fsr.FRelPath;
            case fsr.FAction of
            srsCopyRight:
              if CopyRight then CopyRightFiles.Add(fsr.FFileL.Clone);
            srsCopyLeft:
              if CopyLeft then CopyLeftFiles.Add(fsr.FFileR.Clone);
            srsDeleteRight:
              if DeleteRight then DeleteRightFiles.Add(fsr.FFileR.Clone);
            srsDeleteLeft:
              if DeleteLeft then DeleteLeftFiles.Add(fsr.FFileL.Clone);
            srsDeleteBoth:
              begin
                if DeleteRight then DeleteRightFiles.Add(fsr.FFileR.Clone);
                if DeleteLeft then DeleteLeftFiles.Add(fsr.FFileL.Clone);
              end;
            end;
            i := i + 1;
          until (i = FVisibleItems.Count) or (FVisibleItems.Objects[i] = nil);
        i := i + 1;
        if CopyLeftFiles.Count > 0 then
        begin
          if not CopyFiles(FCmpFileSourceR, FCmpFileSourceL, CopyLeftFiles,
            FCmpFilePathL + Dest) then Break;
        end else CopyLeftFiles.Free;
        if CopyRightFiles.Count > 0 then
        begin
          if not CopyFiles(FCmpFileSourceL, FCmpFileSourceR, CopyRightFiles,
            FCmpFilePathR + Dest) then Break;
        end else CopyRightFiles.Free;
        if DeleteLeftFiles.Count > 0 then
        begin
          if not DeleteFiles(FCmpFileSourceL, DeleteLeftFiles) then Break;
        end
        else DeleteLeftFiles.Free;
        if DeleteRightFiles.Count > 0 then
        begin
          if not DeleteFiles(FCmpFileSourceR, DeleteRightFiles) then Break;
        end
        else DeleteRightFiles.Free;
        if not pnlProgress.Visible then Break;
      end;
      EnableControls(True);
      btnCompare.Click;
    end;
  finally
    Free;
  end;
end;

procedure TfrmSyncDirsDlg.edPath1AcceptDirectory(Sender: TObject;
  var Value: String);
begin
  if Sender = edPath1 then
  begin
    FFileSourceL := TFileSystemFileSource.GetFileSource;
    FAddressL := '';
  end
  else if Sender = edPath2 then
  begin
    FFileSourceR := TFileSystemFileSource.GetFileSource;
    FAddressR := '';
  end;
end;

procedure TfrmSyncDirsDlg.RestoreProperties(Sender: TObject);
var
  Index: Integer;
begin
  with HeaderDG.Columns do
  begin
    for Index := 0 to Count - 1 do
      Items[Index].Width:= StrToIntDef(FIniPropStorage.StoredValue[Format(GRID_COLUMN_FMT, [Index])], Items[Index].Width);
  end;
  RecalcHeaderCols;
end;

procedure TfrmSyncDirsDlg.FormClose(Sender: TObject;
  var CloseAction: TCloseAction);
var
  Index: Integer;
begin
  StopCheckContentThread;
  CloseAction := caFree;
  { settings }
  gSyncDirsSubdirs              := chkSubDirs.Checked;
  gSyncDirsAsymmetric           := chkAsymmetric.Checked and gSyncDirsAsymmetricSave;
  gSyncDirsIgnoreDate           := chkIgnoreDate.Checked;
  gSyncDirsShowFilterCopyRight  := sbCopyRight.Down;
  gSyncDirsShowFilterEqual      := sbEqual.Down;
  gSyncDirsShowFilterNotEqual   := sbNotEqual.Down;
  gSyncDirsShowFilterUnknown    := sbUnknown.Down;
  gSyncDirsShowFilterCopyLeft   := sbCopyLeft.Down;
  gSyncDirsShowFilterDuplicates := sbDuplicates.Down;
  gSyncDirsShowFilterSingles    := sbSingles.Down;
  if gSyncDirsFileMaskSave = True then
  begin
    if not IsMaskSearchTemplate(cbExtFilter.Text) then
      gSyncDirsFileMask         := cbExtFilter.Text;
  end;
  if chkByContent.Enabled then
    gSyncDirsByContent          := chkByContent.Checked;
  glsMaskHistory.Assign(cbExtFilter.Items);

  with HeaderDG.Columns do
  begin
    for Index := 0 to Count - 1 do
      FIniPropStorage.StoredValue[Format(GRID_COLUMN_FMT, [Index])]:= IntToStr(Items[Index].Width);
  end;
end;

procedure TfrmSyncDirsDlg.FormCloseQuery(Sender: TObject; var CanClose: boolean);
begin
  if Assigned(FOperation) then
  begin
    FOperation.Stop;
    CanClose := False;
  end
  else if FScanning then
  begin
    FCancel := True;
    CanClose := False;
  end
  else if FComparing then
  begin
    CanClose := False;
    StopCheckContentThread;
  end;
end;

procedure TfrmSyncDirsDlg.FormCreate(Sender: TObject);
var
  Index: Integer;
  HMSync: THMForm;
begin
  // Initialize property storage
  FIniPropStorage := InitPropStorage(Self);
  FIniPropStorage.OnRestoreProperties:= @RestoreProperties;
  for Index := 0 to HeaderDG.Columns.Count - 1 do
  begin
    FIniPropStorage.StoredValues.Add.DisplayName:= Format(GRID_COLUMN_FMT, [Index]);
  end;

  {$IFDEF LCLCOCOA}
  pnlProgress.Color:=clBtnHighlight;
  {$ENDIF}
  MainDrawGrid.SelectedColor:= gColors.SyncDirs^.SelectedColor;

  lblProgress.Caption    := rsOperCopying;
  lblProgressDelete.Caption   := rsOperDeleting;
  { settings }
  chkSubDirs.Checked     := gSyncDirsSubdirs;
  chkAsymmetric.Checked  := gSyncDirsAsymmetric;
  chkByContent.Checked   := gSyncDirsByContent and chkByContent.Enabled;
  chkIgnoreDate.Checked  := gSyncDirsIgnoreDate;
  sbCopyRight.Down       := gSyncDirsShowFilterCopyRight;
  sbEqual.Down           := gSyncDirsShowFilterEqual;
  sbNotEqual.Down        := gSyncDirsShowFilterNotEqual;
  sbUnknown.Down         := gSyncDirsShowFilterUnknown;
  sbCopyLeft.Down        := gSyncDirsShowFilterCopyLeft;
  sbDuplicates.Down      := gSyncDirsShowFilterDuplicates;
  sbSingles.Down         := gSyncDirsShowFilterSingles;
  if gSyncDirsFileMaskSave = False then
  begin
    Index := glsMaskHistory.IndexOf(gSyncDirsFileMask);
    if Index <> -1 then
      glsMaskHistory.Move(Index, 0)
    else
      glsMaskHistory.Insert(0, gSyncDirsFileMask);
  end;
  cbExtFilter.Items.Assign(glsMaskHistory);
  cbExtFilter.Text       := gSyncDirsFileMask;

  HMSync := HotMan.Register(Self, HotkeysCategory);
  HMSync.RegisterActionList(ActionList);
  FCommands := TFormCommands.Create(Self, ActionList);
end;

procedure TfrmSyncDirsDlg.FormResize(Sender: TObject);
begin
  ProgressBar.Width:= ClientWidth div 3;
  ProgressBarDelete.Width:= ProgressBar.Width;
end;

procedure TfrmSyncDirsDlg.MainDrawGridDblClick(Sender: TObject);
var
  r, x: Integer;
  sr: TFileSyncRec;
begin
  r := MainDrawGrid.Row;
  if (r < 0) or (r >= FVisibleItems.Count) then Exit;
  x := MainDrawGrid.ScreenToClient(Mouse.CursorPos).X;
  if (x > hCols[3].Left) and (x < hCols[3].Left + hCols[3].Width) then Exit;
  sr := TFileSyncRec(FVisibleItems.Objects[r]);
  if not Assigned(sr)
  or not Assigned(sr.FFileR) or not Assigned(sr.FFileL) or (sr.FState = srsEqual)
  then
    Exit;
  PrepareToolData(FFileSourceL, sr.FFileL, FFileSourceR, sr.FFileR, @ShowDifferByGlobList);
end;

procedure TfrmSyncDirsDlg.MainDrawGridDrawCell(Sender: TObject; aCol,
  aRow: Integer; aRect: TRect; aState: TGridDrawState);
var
  r: TFileSyncRec;
  x: Integer;
  s: string;
begin
  if (FVisibleItems = nil) or (aRow >= FVisibleItems.Count) then Exit;
  with MainDrawGrid.Canvas do
  begin
    r := TFileSyncRec(FVisibleItems.Objects[aRow]);
    if r = nil then
    begin
      Brush.Color := clBtnFace;
      FillRect(aRect);
      Font.Bold := True;
      Font.Color := clWindowText;
      with hCols[0] do
        TextRect(Rect(Left, aRect.Top, Left + Width, aRect.Bottom),
          Left + 2, aRect.Top + 2, FVisibleItems[aRow]);
    end else begin
      with gColors.SyncDirs^ do
      begin
        case r.FState of
        srsNotEq:       Font.Color := UnknownColor;
        srsCopyLeft:    Font.Color := RightColor;
        srsCopyRight:   Font.Color := LeftColor;
        srsDeleteLeft:  Font.Color := LeftColor;
        srsDeleteRight: Font.Color := RightColor;
        else Font.Color := clWindowText;
        end;
      end;
      if Assigned(r.FFileL) then
      begin
        with hCols[0] do
          TextRect(Rect(Left, aRect.Top, Left + Width, aRect.Bottom),
            Left + 2, aRect.Top + 2, FVisibleItems[aRow]);
        s := IntToStrTS(r.FFileL.Size);
        with hCols[1] do begin
          x := Left + Width - 8 - TextWidth(s);
          TextRect(Rect(Left, aRect.Top, Left + Width, aRect.Bottom),
            x, aRect.Top + 2, s);
        end;
        s := FormatDateTime(gDateTimeFormatSync, r.FFileL.ModificationTime);
        with hCols[2] do
          TextRect(Rect(Left, aRect.Top, Left + Width, aRect.Bottom),
            Left + 2, aRect.Top + 2, s)
      end;
      if Assigned(r.FFileR) then
      begin
        TextOut(hCols[6].Left + 2, aRect.Top + 2, FVisibleItems[aRow]);
        s := IntToStrTS(r.FFileR.Size);
        with hCols[5] do begin
          x := Left + Width - 8 - TextWidth(s);
          TextRect(Rect(Left, aRect.Top, Left + Width, aRect.Bottom),
            x, aRect.Top + 2, s);
        end;
        s := FormatDateTime(gDateTimeFormatSync, r.FFileR.ModificationTime);
        with hCols[4] do
          TextRect(Rect(Left, aRect.Top, Left + Width, aRect.Bottom),
            Left + 2, aRect.Top + 2, s)
      end;
      ImageList1.Draw(MainDrawGrid.Canvas,
        hCols[3].Left + (hCols[3].Width - ImageList1.Width) div 2 - 2,
        (aRect.Top + aRect.Bottom - ImageList1.Height - 1) div 2, Ord(r.FAction));
    end;
  end;
end;

procedure TfrmSyncDirsDlg.MainDrawGridKeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
var
  ASelection: TGridRect;
begin
  case Key of
    VK_SPACE:
      UpdateSelection(MainDrawGrid.Row);
    VK_A:
    begin
      if (Shift = [ssModifier]) then
      begin
        ASelection.Top:= 0;
        ASelection.Left:= 0;
        ASelection.Right:= MainDrawGrid.ColCount - 1;
        ASelection.Bottom:= MainDrawGrid.RowCount - 1;
        MainDrawGrid.Selection:= ASelection;
      end;
    end;
    VK_C:
      if (Shift = [ssModifier]) then
      begin
        CopyToClipboard;
      end;
    VK_INSERT:
      if (Shift = [ssModifier]) then
      begin
        CopyToClipboard;
      end;
  end;
end;

procedure TfrmSyncDirsDlg.MainDrawGridMouseDown(Sender: TObject;
  Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
var
  c, r: Integer;
begin
  MainDrawGrid.MouseToCell(X, Y, c, r);
  if (r < 0) or (r >= FVisibleItems.Count)
  or (x - 2 < hCols[3].Left)
  or (x - 2 > hCols[3].Left + hCols[3].Width)
  then
    Exit;
  UpdateSelection(R);
end;

procedure TfrmSyncDirsDlg.FormKeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
begin
  if Key = VK_ESCAPE then
  begin
    Key := 0;
    if FScanning then
      FCancel := True
    else if FComparing then
      StopCheckContentThread
    else
      Close;
  end;
end;

procedure TfrmSyncDirsDlg.HeaderDGHeaderClick(Sender: TObject;
  IsColumn: Boolean; Index: Integer);
begin
  if (Index <> 3) and (Index <= 6) then
    SortIndex := Index;
end;

procedure TfrmSyncDirsDlg.HeaderDGHeaderSizing(sender: TObject;
  const IsColumn: boolean; const aIndex, aSize: Integer);
begin
  RecalcHeaderCols;
  MainDrawGrid.Invalidate;
end;

procedure TfrmSyncDirsDlg.FilterSpeedButtonClick(Sender: TObject);
begin
  FillFoundItemsDG
end;

procedure TfrmSyncDirsDlg.MenuItemViewClick(Sender: TObject);
var
  r: Integer;
  f: TFile = nil;
  sr: TFileSyncRec;
begin
  r := MainDrawGrid.Row;
  if (r < 0) or (r >= FVisibleItems.Count) then Exit;
  sr := TFileSyncRec(FVisibleItems.Objects[r]);
  if Assigned(sr) then
  begin
    if Sender = MenuItemViewLeft then
      f := sr.FFileL
    else if Sender = MenuItemViewRight then begin
      f := sr.FFileR;
    end;
    if Assigned(f) then ShowViewerByGlob(f.FullPath);
  end;
end;

procedure TfrmSyncDirsDlg.pmGridMenuPopup(Sender: TObject);
begin
  miSelectDeleteLeft.Visible := not chkAsymmetric.Checked;
  miSelectDeleteBoth.Visible := not chkAsymmetric.Checked;
end;

procedure TfrmSyncDirsDlg.TimerTimer(Sender: TObject);
var
  CopyStatistics: TFileSourceCopyOperationStatistics;
  DeleteStatistics: TFileSourceDeleteOperationStatistics;
begin
  if Assigned(FOperation) then
  begin
    if (FOperation is TFileSourceCopyOperation) then
    begin
      CopyStatistics:= TFileSourceCopyOperation(FOperation).RetrieveStatistics;
      SetProgressBytes(ProgressBar, FCopyStatistics.DoneBytes +
                       CopyStatistics.DoneBytes, FCopyStatistics.TotalBytes);
    end
    else if (FOperation is TFileSourceDeleteOperation) then
    begin
      DeleteStatistics:= TFileSourceDeleteOperation(FOperation).RetrieveStatistics;
      SetProgressFiles(ProgressBarDelete, FDeleteStatistics.DoneFiles +
                       DeleteStatistics.DoneFiles, FDeleteStatistics.TotalFiles);
    end;
  end
  else if Assigned(CheckContentThread) then
  begin
    with TCheckContentThread(CheckContentThread) do
    begin
      Inc(FTimer);
      CopyStatistics:= RetrieveStatistics;
      if (FTimer mod 5 = 0) then UpdateGrid;
      SetProgressBytes(ProgressBar, CopyStatistics.DoneBytes, CopyStatistics.TotalBytes);
    end;
  end;
end;

procedure TfrmSyncDirsDlg.SetSortIndex(AValue: Integer);
var
  s: string;
begin
  if AValue = FSortIndex then
  begin
    s := HeaderDG.Columns[AValue].Title.Caption;
    UTF8Delete(s, 1, 1);
    FSortDesc := not FSortDesc;
    if FSortDesc then s := '↑' + s else s := '↓' + s;
    HeaderDG.Columns[AValue].Title.Caption := s;
    SortFoundItems;
    FillFoundItemsDG;
  end else begin
    if FSortIndex >= 0 then
    begin
      s := HeaderDG.Columns[FSortIndex].Title.Caption;
      UTF8Delete(s, 1, 1);
      HeaderDG.Columns[FSortIndex].Title.Caption := s;
    end;
    FSortIndex := AValue;
    FSortDesc := False;
    with HeaderDG.Columns[FSortIndex].Title do
      Caption := '↓' + Caption;
    SortFoundItems;
    FillFoundItemsDG;
  end;
end;

procedure TfrmSyncDirsDlg.ClearFoundItems;
var
  i, j: Integer;
begin
  for i := 0 to FFoundItems.Count - 1 do
    with TStringList(FFoundItems.Objects[i]) do
    begin
      for j := 0 to Count - 1 do
        Objects[j].Free;
      Clear;
    end;
  FFoundItems.Clear;
end;

procedure TfrmSyncDirsDlg.Compare;
begin
  TopPanel.Enabled := False;
  try
    ClearFoundItems;
    MainDrawGrid.RowCount := 0;
    ScanDirs;
    MainDrawGrid.SetFocus;
  finally
    TopPanel.Enabled := not FComparing;
  end;
end;

procedure TfrmSyncDirsDlg.FillFoundItemsDG;

  procedure CalcStat;
  var
    i: Integer;
    r: TFileSyncRec;
  begin
    Ftotal := 0;
    Fequal := 0;
    Fnoneq := 0;
    FuniqueL := 0;
    FuniqueR := 0;
    for i := 0 to FVisibleItems.Count - 1 do
    begin
      r := TFileSyncRec(FVisibleItems.Objects[i]);
      if Assigned(r) then
      begin
        Inc(Ftotal);
        if Assigned(r.FFileL) and not Assigned(r.FFileR) then Inc(FuniqueL) else
        if Assigned(r.FFileR) and not Assigned(r.FFileL) then Inc(FuniqueR);
        if r.FState = srsEqual then Inc(Fequal) else
        if r.FState = srsNotEq then Inc(Fnoneq) else
        if Assigned(r.FFileL) and Assigned(r.FFileR) then Inc(Fnoneq);
      end;
    end;
  end;

begin
  InitVisibleItems;
  MainDrawGrid.ColCount := 1;
  MainDrawGrid.RowCount := FVisibleItems.Count;
  MainDrawGrid.Invalidate;
  CalcStat;
  UpdateStatusBar;
  if FVisibleItems.Count > 0 then
  begin
    btnCompare.Default := False;
    btnSynchronize.Enabled := True;
    btnSynchronize.Default := True;
  end else begin
    btnCompare.Default := True;
    btnSynchronize.Enabled := False;
    btnSynchronize.Default := False;
  end;
end;

procedure TfrmSyncDirsDlg.InitVisibleItems;
var
  i, j: Integer;
  AFilter: record
    copyLeft, copyRight, eq, neq, unkn: Boolean;
    dup, single: Boolean;
  end;
  r: TFileSyncRec;

begin
  if Assigned(FVisibleItems) then
    FVisibleItems.Clear
  else begin
    FVisibleItems := TStringListEx.Create;
    FVisibleItems.CaseSensitive := FileNameCaseSensitive;
  end;
  { init filter }
  with AFilter do
  begin
    copyLeft := sbCopyLeft.Down;
    copyRight := sbCopyRight.Down;
    eq := sbEqual.Down;
    neq := sbNotEqual.Down;
    unkn := sbUnknown.Down;
    dup := sbDuplicates.Down;
    single := sbSingles.Down;
  end;
  for i := 0 to FFoundItems.Count - 1 do
  begin
    if FFoundItems[i] <> '' then
      FVisibleItems.Add(AppendPathDelim(FFoundItems[i]));
    with TStringList(FFoundItems.Objects[i]) do
      for j := 0 to Count - 1 do
      begin
        { check filter }
        r := TFileSyncRec(Objects[j]);
        if ((Assigned(r.FFileL) <> Assigned(r.FFileR)) and AFilter.single or
           (Assigned(r.FFileL) = Assigned(r.FFileR)) and AFilter.dup)
           and
           ((r.FState = srsCopyLeft) and AFilter.copyLeft or
            (r.FState = srsCopyRight) and AFilter.copyRight or
            (r.FState = srsDeleteLeft) and AFilter.copyRight or
            (r.FState = srsDeleteRight) and AFilter.copyLeft or
            (r.FState = srsEqual) and AFilter.eq or
            (r.FState = srsNotEq) and AFilter.neq or
            (r.FState = srsUnknown) and AFilter.unkn)
        then
          FVisibleItems.AddObject(Strings[j], Objects[j]);
      end;
  end;
  { remove empty dirs after filtering }
  for i := FVisibleItems.Count - 1 downto 0 do
    if (FVisibleItems.Objects[i] = nil)
    and ((i + 1 >= FVisibleItems.Count) or (FVisibleItems.Objects[i + 1] = nil)) then
      FVisibleItems.Delete(i);
end;

procedure TfrmSyncDirsDlg.RecalcHeaderCols;
var
  i, l: Integer;
begin
  l := 0;
  for i := 0 to 6 do
    with hCols[i] do
    begin
      Left := l;
      Width := HeaderDG.Columns[i].Width;
      l := l + Width;
    end;
end;

procedure TfrmSyncDirsDlg.ScanDirs;

var
  MaskList: TMaskList;
  Template: TSearchTemplate;
  LeftFirst: Boolean = True;
  RightFirst: Boolean = True;
  BaseDirL, BaseDirR: string;
  ignoreDate, Subdirs, ByContent: Boolean;

  procedure ScanDir(dir: string);

    procedure ProcessOneSide(it, dirs: TStringList; var ASide: Boolean; sideLeft: Boolean);
    var
      fs: TFiles;
      i, j: Integer;
      f: TFile;
      r: TFileSyncRec;
    begin
      if sideLeft then
        fs := FFileSourceL.GetFiles(BaseDirL + dir)
      else begin
        fs := FFileSourceR.GetFiles(BaseDirR + dir);
      end;
      if chkOnlySelected.Checked and ASide then
      begin
        ASide:= False;
        for I:= fs.Count - 1 downto 0 do
        begin
          if FSelectedItems.IndexOf(fs[I].Name) < 0 then
            fs.Delete(I);
        end;
      end;
      try
        for i := 0 to fs.Count - 1 do
        begin
          f := fs.Items[i];
          if f.IsDirectory or f.IsLinkToDirectory then
          begin
            if (f.NameNoExt <> '.') and (f.NameNoExt <> '..') then
            begin
              if (Template = nil) or (CheckDirectoryName(Template.FileChecks, f.Name)) then
                dirs.Add(f.Name);
            end;
          end
          else if (Template = nil) or Template.CheckFile(f) then
          begin
            if ((MaskList = nil) or MaskList.Matches(f.Name)) then
            begin
              j := it.IndexOf(f.Name);
              if j < 0 then
                r := TFileSyncRec.Create(Self, dir)
              else
                r := TFileSyncRec(it.Objects[j]);
              if sideLeft then
              begin
                r.FFileL := f.Clone;
                r.UpdateState(ignoreDate);
              end else begin
                r.FFileR := f.Clone;
                r.UpdateState(ignoreDate);
                if ByContent and (r.FState = srsEqual) and (r.FFileR.Size > 0) then
                begin
                  r.FAction := srsUnknown;
                  r.FState := srsUnknown;
                end;
              end;
              it.AddObject(f.Name, r);
            end;
          end;
        end;
      finally
        fs.Free;
      end;
    end;

  var
    i, j, tot: Integer;
    it: TStringList;
    dirsLeft, dirsRight: TStringListEx;
    d: string;
  begin
    i := FFoundItems.IndexOf(dir);
    if i < 0 then
    begin
      it := TStringListEx.Create;
      it.CaseSensitive := FileNameCaseSensitive;
      it.Sorted := True;
      FFoundItems.AddObject(dir, it);
    end else
      it := TStringList(FFoundItems.Objects[i]);
    if dir <> '' then dir := AppendPathDelim(dir);
    dirsLeft := TStringListEx.Create;
    dirsLeft.CaseSensitive := FileNameCaseSensitive;
    dirsLeft.Sorted := True;
    dirsRight := TStringListEx.Create;
    dirsRight.CaseSensitive := FileNameCaseSensitive;
    dirsRight.Sorted := True;
    try
      Application.ProcessMessages;
      if FCancel then Exit;
      ProcessOneSide(it, dirsLeft, LeftFirst, True);
      ProcessOneSide(it, dirsRight, RightFirst, False);
      SortFoundItems(it);
      if not Subdirs then Exit;
      tot := dirsLeft.Count + dirsRight.Count;
      for i := 0 to dirsLeft.Count - 1 do
      begin
        if dir = '' then
          StatusBar1.Panels[0].Text :=
            Format(rsComparingPercent, [i * 100 div tot]);
        d := dirsLeft[i];
        ScanDir(dir + d);
        if FCancel then Exit;
        j := dirsRight.IndexOf(d);
        if j >= 0 then
        begin
          dirsRight.Delete(j);
          Dec(tot);
        end
      end;
      for i := 0 to dirsRight.Count - 1 do
      begin
        if dir = '' then
          StatusBar1.Panels[0].Text :=
            Format(rsComparingPercent, [(dirsLeft.Count + i) * 100 div tot]);
        d := dirsRight[i];
        ScanDir(dir + d);
        if FCancel then Exit;
      end;
    finally
      dirsLeft.Free;
      dirsRight.Free;
    end;
  end;

begin
  FScanning := True;
  try
  FCancel := False;
  FCmpFileSourceL := FFileSourceL;
  FCmpFileSourceR := FFileSourceR;
  BaseDirL := AppendPathDelim(edPath1.Text);
  if IsMaskSearchTemplate(cbExtFilter.Text) then
  begin
    MaskList := nil;
    Template:= gSearchTemplateList.TemplateByName[cbExtFilter.Text];
  end
  else begin
    Template := nil;
    MaskList := TMaskList.Create(cbExtFilter.Text);
  end;
  if (FAddressL <> '') and (Copy(BaseDirL, 1, Length(FAddressL)) = FAddressL) then
    Delete(BaseDirL, 1, Length(FAddressL));
  BaseDirR := AppendPathDelim(edPath2.Text);
  if (FAddressR <> '') and (Copy(BaseDirR, 1, Length(FAddressR)) = FAddressR) then
    Delete(BaseDirR, 1, Length(FAddressR));
  FCmpFilePathL := BaseDirL;
  FCmpFilePathR := BaseDirR;
  ignoreDate := chkIgnoreDate.Checked;
  Subdirs := chkSubDirs.Checked;
  ByContent := chkByContent.Checked;
  if chkAsymmetric.Checked then
    FFileExists:= srsDeleteRight
  else begin
    FFileExists:= srsCopyLeft;
  end;
  ScanDir('');
  MaskList.Free;
  FillFoundItemsDG;
  if FCancel then Exit;
  if (FFoundItems.Count > 0) and chkByContent.Checked then
  begin
    CheckContentThread := TCheckContentThread.Create(Self);
    FComparing := True;
  end;
  finally
  FScanning := False;
  end;
end;

procedure TfrmSyncDirsDlg.SortFoundItems;
var
  i: Integer;
begin
  if FSortIndex < 0 then Exit;
  for i := 0 to FFoundItems.Count - 1 do
    SortFoundItems(TStringList(FFoundItems.Objects[i]));
end;

procedure TfrmSyncDirsDlg.SortFoundItems(sl: TStringList);

  function CompareFn(sl: TStringList; i, j: Integer): Integer;
  var
    r1, r2: TFileSyncRec;
  begin
    if FSortIndex in [1..5] then
    begin
      r1 := TFileSyncRec(sl.Objects[i]);
      r2 := TFileSyncRec(sl.Objects[j]);
    end;
    case FSortIndex of
    0:
      Result := mbCompareStr(sl[i], sl[j]);
    1:
      if (Assigned(r1.FFileL) < Assigned(r2.FFileL))
      or Assigned(r2.FFileL) and (r1.FFileL.Size < r2.FFileL.Size) then
        Result := -1
      else
      if (Assigned(r1.FFileL) > Assigned(r2.FFileL))
      or Assigned(r1.FFileL) and (r1.FFileL.Size > r2.FFileL.Size) then
        Result := 1
      else
        Result := 0;
    2:
      if (Assigned(r1.FFileL) < Assigned(r2.FFileL))
      or Assigned(r2.FFileL)
      and (r1.FFileL.ModificationTime < r2.FFileL.ModificationTime) then
        Result := -1
      else
      if (Assigned(r1.FFileL) > Assigned(r2.FFileL))
      or Assigned(r1.FFileL)
      and (r1.FFileL.ModificationTime > r2.FFileL.ModificationTime) then
        Result := 1
      else
        Result := 0;
    4:
      if (Assigned(r1.FFileR) < Assigned(r2.FFileR))
      or Assigned(r2.FFileR)
      and (r1.FFileR.ModificationTime < r2.FFileR.ModificationTime) then
        Result := -1
      else
      if (Assigned(r1.FFileR) > Assigned(r2.FFileR))
      or Assigned(r1.FFileR)
      and (r1.FFileR.ModificationTime > r2.FFileR.ModificationTime) then
        Result := 1
      else
        Result := 0;
    5:
      if (Assigned(r1.FFileR) < Assigned(r2.FFileR))
      or Assigned(r2.FFileR) and (r1.FFileR.Size < r2.FFileR.Size) then
        Result := -1
      else
      if (Assigned(r1.FFileR) > Assigned(r2.FFileR))
      or Assigned(r1.FFileR) and (r1.FFileR.Size > r2.FFileR.Size) then
        Result := 1
      else
        Result := 0;
    6:
      Result := mbCompareStr(sl[i], sl[j]);
    end;
    if FSortDesc then
      Result := -Result;
  end;

  procedure QuickSort(L, R: Integer; sl: TStringList);
  var
    Pivot, vL, vR: Integer;
  begin
    if R - L <= 1 then begin // a little bit of time saver
      if L < R then
        if CompareFn(sl, L, R) > 0 then
          sl.Exchange(L, R);
      Exit;
    end;

    vL := L;
    vR := R;

    Pivot := L + Random(R - L); // they say random is best

    while vL < vR do begin
      while (vL < Pivot) and (CompareFn(sl, vL, Pivot) <= 0) do
        Inc(vL);

      while (vR > Pivot) and (CompareFn(sl, vR, Pivot) > 0) do
        Dec(vR);

      sl.Exchange(vL, vR);

      if Pivot = vL then // swap pivot if we just hit it from one side
        Pivot := vR
      else if Pivot = vR then
        Pivot := vL;
    end;

    if Pivot - 1 >= L then
      QuickSort(L, Pivot - 1, sl);
    if Pivot + 1 <= R then
      QuickSort(Pivot + 1, R, sl);
  end;

begin
  QuickSort(0, sl.Count - 1, sl);
end;

procedure TfrmSyncDirsDlg.UpdateStatusBar;
var s: string;
begin
  s := Format(rsFilesFound, [Ftotal, Fequal, Fnoneq, FuniqueL, FuniqueR]);
  if Assigned(CheckContentThread)
  and not TCheckContentThread(CheckContentThread).Done then
    s := s + ' ...';
  StatusBar1.Panels[0].Text := s;
end;

procedure TfrmSyncDirsDlg.StopCheckContentThread;
begin
  if Assigned(CheckContentThread) then
  begin
    with TCheckContentThread(CheckContentThread) do
    begin
      Terminate;
      WaitFor;
    end;
    FreeAndNil(CheckContentThread);
  end;
end;

procedure TfrmSyncDirsDlg.UpdateSelection(R: Integer);
var
  sr: TFileSyncRec;
  ca: TSyncRecState;
begin
  sr := TFileSyncRec(FVisibleItems.Objects[r]);
  if not Assigned(sr) or (sr.FState = srsEqual) then Exit;
  ca := sr.FAction;
  case ca of
  srsNotEq:
    ca := srsCopyRight;
  srsCopyRight:
    if Assigned(sr.FFileR) then
      ca := srsCopyLeft
    else
      ca := srsDoNothing;
  srsCopyLeft:
    if Assigned(sr.FFileL) then
      ca := srsNotEq
    else
      ca := srsDoNothing;
  srsDeleteRight:
    if not chkAsymmetric.Checked then
      ca := sr.FState
    else
      ca := srsDoNothing;
  srsDeleteLeft:
    ca := sr.FState;
  srsDeleteBoth:
    ca := sr.FState;
  srsDoNothing:
    if Assigned(sr.FFileL) then
      ca := srsCopyRight
    else
      ca := FFileExists;
  end;
  sr.FAction := ca;
  MainDrawGrid.InvalidateRow(r);
end;

procedure TfrmSyncDirsDlg.EnableControls(AEnabled: Boolean);
begin
  edPath1.Enabled:= AEnabled;
  edPath2.Enabled:= AEnabled;
  TopPanel.Enabled:= AEnabled;
  HeaderDG.Enabled:= AEnabled;
  pnlFilter.Enabled:= AEnabled;
  MainDrawGrid.Enabled:= AEnabled;
  pnlProgress.Visible:= not AEnabled;
  Timer.Enabled:= not AEnabled;
end;

procedure TfrmSyncDirsDlg.SetSyncRecState(AState: TSyncRecState);
var
  R, Y: Integer;
  Selection: TGridRect;
  SyncRec: TFileSyncRec;

  procedure UpdateAction(NewAction: TSyncRecState);
  begin
    case NewAction of
      srsUnknown:
        NewAction:= SyncRec.FState;
      srsNotEq:
        begin
          if (SyncRec.FAction = srsCopyLeft) and Assigned(SyncRec.FFileL) then
              NewAction:= srsCopyRight
          else if (SyncRec.FAction = srsCopyRight) and Assigned(SyncRec.FFileR) then
              NewAction:= srsCopyLeft
          else
            NewAction:= SyncRec.FAction
        end;
      srsCopyLeft:
        begin
          if not Assigned(SyncRec.FFileR) then
            NewAction:= srsDoNothing;
        end;
      srsCopyRight:
        begin
          if not Assigned(SyncRec.FFileL) then
            NewAction:= srsDoNothing;
        end;
      srsDeleteLeft:
        begin
          if not Assigned(SyncRec.FFileL) then
            NewAction:= srsDoNothing;
        end;
      srsDeleteRight:
        begin
          if not Assigned(SyncRec.FFileR) then
            NewAction:= srsDoNothing;
        end;
      srsDeleteBoth:
        begin
          if not Assigned(SyncRec.FFileL) then
            NewAction:= srsDeleteRight;
          if not Assigned(SyncRec.FFileR) then
            NewAction:= srsDeleteLeft;
        end;
    end;
    SyncRec.FAction:= NewAction;
    MainDrawGrid.InvalidateRow(R);
  end;

begin
  Selection:= MainDrawGrid.Selection;
  if (MainDrawGrid.HasMultiSelection) or (Selection.Bottom <> Selection.Top) then
  begin
    for Y:= 0 to MainDrawGrid.SelectedRangeCount - 1 do
    begin
      Selection:= MainDrawGrid.SelectedRange[Y];
      for R := Selection.Top to Selection.Bottom do
      begin
        SyncRec := TFileSyncRec(FVisibleItems.Objects[R]);
        if Assigned(SyncRec) then UpdateAction(AState);
      end;
    end;
    Exit;
  end;
  R := MainDrawGrid.Row;
  if (R < 0) or (R >= FVisibleItems.Count) then Exit;
  SyncRec := TFileSyncRec(FVisibleItems.Objects[r]);
  if Assigned(SyncRec) then
  begin
    UpdateAction(AState);
  end
  else begin
    Inc(R);
    while R < FVisibleItems.Count do
    begin
      SyncRec := TFileSyncRec(FVisibleItems.Objects[R]);
      if (SyncRec = nil) then Break;
      UpdateAction(AState);
      Inc(R);
    end;
  end;
end;

procedure TfrmSyncDirsDlg.DeleteFiles(ALeft, ARight: Boolean);
var
  Message: String;
  ALeftList: TFiles;
  ARightList: TFiles;
begin
  if not ALeft then
    ALeftList:= nil
  else begin
    ALeftList:= TFiles.Create(EmptyStr);
  end;

  if not ARight then
    ARightList:= nil
  else begin
    ARightList:= TFiles.Create(EmptyStr);
  end;

  try
    Message:= EmptyStr;
    UpdateList(ALeftList, ARightList, False, False);

    ALeft:= ALeft and (ALeftList.Count > 0);
    ARight:= ARight and (ARightList.Count > 0);

    if (ALeft = False) and (ARight = False) then Exit;

    FDeleteStatistics.DoneFiles:= 0;
    FDeleteStatistics.TotalFiles:= 0;

    if ALeft then
    begin
      FDeleteStatistics.TotalFiles+= ALeftList.Count;
      Message:= Format(rsVarLeftPanel + ': ' + rsMsgDelFlDr, [ALeftList.Count]) + LineEnding;
    end;

    if ARight then
    begin
      FDeleteStatistics.TotalFiles+= ARightList.Count;
      Message+= Format(rsVarRightPanel + ': ' + rsMsgDelFlDr, [ARightList.Count]) + LineEnding;
    end;

    if MessageDlg(Message, mtWarning, [mbYes, mbNo], 0, mbYes) = mrYes then
    begin
      EnableControls(False);
      pnlCopyProgress.Visible:= False;
      pnlDeleteProgress.Visible:= True;
      if ALeft then DeleteFiles(FCmpFileSourceL, ALeftList);
      if ARight then DeleteFiles(FCmpFileSourceR, ARightList);
      UpdateList(nil, nil, ALeft, ARight);
      EnableControls(True);
    end;
  finally
    ALeftList.Free;
    ARightList.Free;
  end;
end;

function TfrmSyncDirsDlg.DeleteFiles(FileSource: IFileSource; var Files: TFiles): Boolean;
begin
  Files.Path := Files[0].Path;
  FOperation:= FileSource.CreateDeleteOperation(Files);
  if not Assigned(FOperation) then
  begin
    MessageDlg(rsMsgErrNotSupported, mtError, [mbOK], 0);
    Exit(False);
  end;
  if (FOperation is TFileSystemDeleteOperation) then
  begin
    TFileSystemDeleteOperation(FOperation).Recycle:= gUseTrash;
  end;
  FOperation.Elevate:= ElevateAction;
  FOperation.AddUserInterface(FFileSourceOperationMessageBoxesUI);
  try
    FOperation.Execute;
    Result := FOperation.Result = fsorFinished;
    FDeleteStatistics.DoneFiles+= TFileSourceDeleteOperation(FOperation).RetrieveStatistics.TotalFiles;
    SetProgressFiles(ProgressBarDelete, FDeleteStatistics.DoneFiles, FDeleteStatistics.TotalFiles);
  finally
    FreeAndNil(FOperation);
  end;
end;

procedure TfrmSyncDirsDlg.UpdateList(ALeft, ARight: TFiles; ARemoveLeft,
  ARemoveRight: Boolean);
var
  R, Y: Integer;
  ARemove: Boolean;
  Selection: TGridRect;
  SyncRec: TFileSyncRec;

  procedure AddRemoveItem;
  begin
    if Assigned(ALeft) and Assigned(SyncRec.FFileL) then
      ALeft.Add(SyncRec.FFileL.Clone);

    if Assigned(ARight) and Assigned(SyncRec.FFileR) then
      ARight.Add(SyncRec.FFileR.Clone);

    if ARemove then
    begin
      if ARemoveLeft and Assigned(SyncRec.FFileL) then
        FreeAndNil(SyncRec.FFileL);
      if ARemoveRight and Assigned(SyncRec.FFileR) then
        FreeAndNil(SyncRec.FFileR);

      if Assigned(SyncRec.FFileL) or Assigned(SyncRec.FFileR) then
        SyncRec.UpdateState(chkIgnoreDate.Checked)
      else begin
        MainDrawGrid.DeleteRow(R);
        FVisibleItems.Delete(R);
      end;
    end;
  end;

begin
  Selection:= MainDrawGrid.Selection;
  ARemove:= ARemoveLeft or ARemoveRight;
  if (MainDrawGrid.HasMultiSelection) or (Selection.Bottom <> Selection.Top) then
  begin
    if ARemove then MainDrawGrid.BeginUpdate;
    for Y:= 0 to MainDrawGrid.SelectedRangeCount - 1 do
    begin
      Selection:= MainDrawGrid.SelectedRange[Y];
      for R := Selection.Bottom downto Selection.Top do
      begin
        SyncRec := TFileSyncRec(FVisibleItems.Objects[R]);
        if Assigned(SyncRec) then AddRemoveItem;
      end;
    end;
    if ARemove then MainDrawGrid.EndUpdate;
    Exit;
  end;
  R := MainDrawGrid.Row;
  if (R < 0) or (R >= FVisibleItems.Count) then Exit;
  SyncRec := TFileSyncRec(FVisibleItems.Objects[r]);
  if ARemove then MainDrawGrid.BeginUpdate;
  if Assigned(SyncRec) then
  begin
    AddRemoveItem;
  end
  else begin
    Y:= R;
    Inc(R);
    while R < FVisibleItems.Count do
    begin
      if (FVisibleItems.Objects[R] = nil) then Break;
      Inc(R);
    end;
    Dec(R);
    while R > Y do
    begin
      SyncRec := TFileSyncRec(FVisibleItems.Objects[R]);
      AddRemoveItem;
      Dec(R);
    end;
  end;
  if ARemove then MainDrawGrid.EndUpdate;
end;

procedure TfrmSyncDirsDlg.SetProgressBytes(AProgressBar: TKASProgressBar;
  CurrentBytes: Int64; TotalBytes: Int64);
var
  BarText : String;
  CaptionText : String;
begin
  BarText := cnvFormatFileSize(CurrentBytes, uoscOperation) + '/' + cnvFormatFileSize(TotalBytes, uoscOperation);
  AProgressBar.SetProgress(CurrentBytes, TotalBytes, BarText );

  {$IFDEF LCLCOCOA}
  if TotalBytes > 0 then
    CaptionText := rsOperCopying + ': ' + BarText + ' (' + FloatToStrF((CurrentBytes / TotalBytes) * 100, ffFixed, 0, 0) + '%)'
  else
    CaptionText := rsOperCopying;
  lblProgress.Caption := CaptionText;
  {$ENDIF}
end;

procedure TfrmSyncDirsDlg.SetProgressFiles(AProgressBar: TKASProgressBar;
  CurrentFiles: Int64; TotalFiles: Int64);
var
  BarText : String;
  CaptionText : String;
begin
  BarText := IntToStrTS(CurrentFiles) + '/' + IntToStrTS(TotalFiles);
  AProgressBar.SetProgress(CurrentFiles, TotalFiles, BarText );

  {$IFDEF LCLCOCOA}
  if TotalFiles > 0 then
    CaptionText := rsOperDeleting + ': ' + BarText + ' (' + FloatToStrF((CurrentFiles / TotalFiles) * 100, ffFixed, 0, 0) + '%)'
  else
    CaptionText := rsOperDeleting;
  lblProgressDelete.Caption := CaptionText;
  {$ENDIF}
end;

procedure TfrmSyncDirsDlg.DoAutoAdjustLayout(const AMode: TLayoutAdjustmentPolicy;
                                             const AXProportion, AYProportion: Double);
begin
  inherited DoAutoAdjustLayout(AMode, AXProportion, AYProportion);
  RecalcHeaderCols;
end;

constructor TfrmSyncDirsDlg.Create(AOwner: TComponent; FileView1,
  FileView2: TFileView);
var
  Index: Integer;
  AFiles: TFiles;
begin
  inherited Create(AOwner);
  FFoundItems := TStringListEx.Create;
  FFoundItems.CaseSensitive := FileNameCaseSensitive;
  FFoundItems.Sorted := True;
  FFileSourceL := FileView1.FileSource;
  FFileSourceR := FileView2.FileSource;
  FAddressL := FileView1.CurrentAddress;
  FAddressR := FileView2.CurrentAddress;
  with FileView1 do
    edPath1.Text := FAddressL + CurrentPath;
  with FileView2 do
    edPath2.Text := FAddressR + CurrentPath;
  RecalcHeaderCols;
  MainDrawGrid.DoubleBuffered := True;
  MainDrawGrid.Font.Bold := True;
  FSortIndex := -1;
  SortIndex := 0;
  FScanning := False;
  FSortDesc := False;
  MainDrawGrid.RowCount := 0;
  // ---------------------------------------------------------------------------
  FSelectedItems := TStringListEx.Create;
  FSelectedItems.Sorted := True;
  FSelectedItems.Duplicates := dupIgnore;
  FSelectedItems.CaseSensitive := FileNameCaseSensitive;
  // Get selected items from active panel
  AFiles := FileView1.CloneSelectedFiles;
  for Index := 0 to AFiles.Count - 1 do
  begin
    FSelectedItems.Add(AFiles[Index].Name);
  end;
  AFiles.Free;
  // Get selected items from passive panel
  AFiles := FileView2.CloneSelectedFiles;
  for Index := 0 to AFiles.Count - 1 do
  begin
    FSelectedItems.Add(AFiles[Index].Name);
  end;
  AFiles.Free;
  // ---------------------------------------------------------------------------
  chkOnlySelected.Enabled := (FSelectedItems.Count > 0) and
                             (FileView1.FlatView = False) and
                             (FileView2.FlatView = False);
  chkOnlySelected.Checked := chkOnlySelected.Enabled;
  // ---------------------------------------------------------------------------
  chkByContent.Enabled := FFileSourceL.IsClass(TFileSystemFileSource) and
                          FFileSourceR.IsClass(TFileSystemFileSource);
  chkAsymmetric.Enabled := fsoDelete in FileView2.FileSource.GetOperationsTypes;
  // ---------------------------------------------------------------------------
  actDeleteLeft.Enabled := fsoDelete in FileView1.FileSource.GetOperationsTypes;
  actDeleteRight.Enabled := fsoDelete in FileView2.FileSource.GetOperationsTypes;
  actDeleteBoth.Enabled := actDeleteLeft.Enabled and actDeleteRight.Enabled;
  // ---------------------------------------------------------------------------
  FFileSourceOperationMessageBoxesUI := TFileSourceOperationMessageBoxesUI.Create;
  if (FFileSourceL.IsClass(TFileSystemFileSource)) and (FFileSourceR.IsClass(TFileSystemFileSource)) then
  begin
    FNtfsShift := gNtfsHourTimeDelay and NtfsHourTimeDelay(FileView1.CurrentPath, FileView2.CurrentPath);
  end;
end;

destructor TfrmSyncDirsDlg.Destroy;
begin
  HotMan.UnRegister(Self);
  FFileSourceOperationMessageBoxesUI.Free;
  FVisibleItems.Free;
  FSelectedItems.Free;
  if Assigned(FFoundItems) then
  begin
    ClearFoundItems;
    FFoundItems.Free;
  end;
  inherited Destroy;
end;

procedure TfrmSyncDirsDlg.CopyToClipboard;
var
  sl: TStringList;
  RowList: TIntegerList;
  I: Integer;

  procedure FillRowList(RowList: TIntegerList);
  var
    R, Y: Integer;
    Selection: TGridRect;
  begin
    Selection := MainDrawGrid.Selection;
    if (MainDrawGrid.HasMultiSelection) or (Selection.Bottom <> Selection.Top) then
    begin
      for Y:= 0 to MainDrawGrid.SelectedRangeCount - 1 do
      begin
        Selection:= MainDrawGrid.SelectedRange[Y];
        for R := Selection.Top to Selection.Bottom do
        begin
          if RowList.IndexOf(R) = -1 then
          begin
            RowList.Add(R);
          end;
        end;
      end;
    end
    else
    begin
      R := MainDrawGrid.Row;
      if RowList.IndexOf(R) = -1 then
      begin
        RowList.Add(R);
      end;
    end;
    RowList.Sort;
  end;

  procedure PrintRow(R: Integer);
  var
    s: string;
    SyncRec: TFileSyncRec;
  begin
    s := '';
    SyncRec := TFileSyncRec(FVisibleItems.Objects[R]);
    if not Assigned(SyncRec) then
    begin
      s := s + FVisibleItems[R];
    end
    else
    begin
      if Assigned(SyncRec.FFileL) then
      begin
        s := s + FVisibleItems[R];
        s := s + #9;
        s := s + IntToStrTS(SyncRec.FFileL.Size);
        s := s + #9;
        s := s + FormatDateTime(gDateTimeFormatSync, SyncRec.FFileL.ModificationTime);
      end;
      if Length(s) <> 0 then
        s := s + #9;
      case SyncRec.FState of
        srsUnknown:
          s := s + '?';
        srsEqual:
          s := s + '=';
        srsNotEq:
          s := s + '!=';
        srsCopyLeft:
          s := s + '<-';
        srsCopyRight:
          s := s + '->';
      end;
      if Length(s) <> 0 then
        s := s + #9;
      if Assigned(SyncRec.FFileR) then
      begin
        s := s + FormatDateTime(gDateTimeFormatSync, SyncRec.FFileR.ModificationTime);
        s := s + #9;
        s := s + IntToStrTS(SyncRec.FFileR.Size);
        s := s + #9;
        s := s + FVisibleItems[R];
      end;
    end;
    sl.Add(s);
  end;
begin
  sl := TStringList.Create;
  RowList := TIntegerList.Create;
  try
    FillRowList(RowList);
    for I := 0 to RowList.Count - 1 do
    begin
      PrintRow(RowList[I]);
    end;
    ClipboardSetText(sl.Text);
  finally
    FreeAndNil(sl);
    FreeAndNil(RowList);
  end;
end;

procedure TfrmSyncDirsDlg.cm_SelectClear(const Params: array of string);
begin
  SetSyncRecState(srsDoNothing);
end;

procedure TfrmSyncDirsDlg.cm_SelectDeleteLeft(const Params: array of string);
begin
  SetSyncRecState(srsDeleteLeft);
end;

procedure TfrmSyncDirsDlg.cm_SelectDeleteRight(const Params: array of string);
begin
  SetSyncRecState(srsDeleteRight);
end;

procedure TfrmSyncDirsDlg.cm_SelectDeleteBoth(const Params: array of string);
begin
  SetSyncRecState(srsDeleteBoth);
end;

procedure TfrmSyncDirsDlg.cm_SelectCopyDefault(const Params: array of string);
begin
  SetSyncRecState(srsUnknown);
end;

procedure TfrmSyncDirsDlg.cm_SelectCopyReverse(const Params: array of string);
begin
  SetSyncRecState(srsNotEq);
end;

procedure TfrmSyncDirsDlg.cm_SelectCopyLeftToRight(const Params: array of string);
begin
  SetSyncRecState(srsCopyRight);
end;

procedure TfrmSyncDirsDlg.cm_SelectCopyRightToLeft(const Params: array of string);
begin
  SetSyncRecState(srsCopyLeft);
end;

procedure TfrmSyncDirsDlg.cm_DeleteLeft(const Params: array of string);
begin
  DeleteFiles(True, False);
end;

procedure TfrmSyncDirsDlg.cm_DeleteRight(const Params: array of string);
begin
  DeleteFiles(False, True);
end;

procedure TfrmSyncDirsDlg.cm_DeleteBoth(const Params: array of string);
begin
  DeleteFiles(True, True);
end;

initialization
  TFormCommands.RegisterCommandsForm(TfrmSyncDirsDlg, HotkeysCategory, @rsHotkeyCategorySyncDirs);

end.

