unit Settings;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, StrUtils, Grids, Wrapgrid;

type
  TForm_Settings = class(TForm)
    check_filesashex: TCheckBox;
    btn_ok:     TButton;
    btn_cancel: TButton;
    btn_register_oldb: TButton;
    btn_register_opf: TButton;
    btn_register_dat: TButton;
    label_charset: TLabel;
    combo_charset: TComboBox;
    check_hideunused: TCheckBox;
    procedure btn_register_opfClick(Sender: TObject);
    procedure btn_register_oldbClick(Sender: TObject);
    procedure btn_register_datClick(Sender: TObject);
    procedure btn_cancelClick(Sender: TObject);
    procedure btn_okClick(Sender: TObject);
    procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
    procedure FormShow(Sender: TObject);
    function RegisterExtension(ext: String): Integer;
  private
  public
  end;

var
  Form_Settings: TForm_Settings;

implementation

{$R *.dfm}

uses
  Main, Data, FTypeReg;




function ExtensionRegistered(ext: String; var RegisteredAs: String): Boolean;
var
  ftr: TFileTypeRegistration;
begin
  ftr := TFileTypeRegistration.Create;
  if (ftr <> nil) then
  begin
    try
      RegisteredAs := ftr.GetInternalKey(ext);
      if RegisteredAs <> '' then
        Result := True
      else
        Result := False;
    finally
      ftr.Free;
    end;
  end;
end;




function TForm_Settings.RegisterExtension(ext: String): Integer;
var
  ftr:     TFileTypeRegistration;
  temps:   String;
  warnmsg: String;
begin
  Result := -1;
  if ExtensionRegistered(ext, temps) then
  begin
    if temps <> 'ONI' + ext then
    begin
      warnmsg := ext + '-files are not registered to OUP but as "' +
        temps + '"-files.' + #13 + #10 + 'Do you really want to unregister' +
        ext + '-files?';
      if MessageBox(Self.Handle, PChar(warnmsg), PChar('Warning'), MB_YESNO) = ID_NO then
        Exit;
    end;
    ftr := TFileTypeRegistration.Create;
    if ftr <> nil then
      try
        if not ftr.UnregisterExtension(ext) then
          ShowMessage('Could not unregister ' + ext + '-files')
        else
          Result := 2;
      finally
        ftr.Free;
      end;
  end
  else
  begin
    ftr := TFileTypeRegistration.Create;
    if ftr <> nil then
    begin
      try
        if ftr.RegisterType(ext, 'ONI' + ext, 'ONI ' + ext + '-file',
          Application.EXEname + ',1') then
        begin
          ftr.AddHandler('open', '"' + Application.EXEname + '" ' + MidStr(
            ext, 2, Length(ext) - 1) + ' "%1"');
          ftr.SetDefaultHandler;
          Result := 1;
        end;
      finally
        ftr.Free;
      end;
    end;
  end;
end;




procedure TForm_Settings.btn_cancelClick(Sender: TObject);
begin
  Self.Close;
end;




procedure TForm_Settings.btn_okClick(Sender: TObject);
begin
  AppSettings.FilenumbersAsHex := check_filesashex.Checked;
  AppSettings.CharSet := StrToInt(
    MidStr(combo_charset.Items.Strings[combo_charset.ItemIndex], Pos(
    ' ', combo_charset.Items.Strings[combo_charset.ItemIndex]) + 3, Length(
    combo_charset.Items.Strings[combo_charset.ItemIndex]) - Pos(
    ' ', combo_charset.Items.Strings[combo_charset.ItemIndex]) - 2));
  AppSettings.HideUnusedData := check_hideunused.Checked;

  Self.Close;
end;




procedure TForm_Settings.btn_register_datClick(Sender: TObject);
begin
  case RegisterExtension('.dat') of
    2:
      btn_register_dat.Caption := 'Register .dat files with OUP';
    1:
      btn_register_dat.Caption := 'Unregister .dat files';
  end;
end;




procedure TForm_Settings.btn_register_oldbClick(Sender: TObject);
begin
  case RegisterExtension('.oldb') of
    2:
      btn_register_oldb.Caption := 'Register .oldb files with OUP';
    1:
      btn_register_oldb.Caption := 'Unregister .oldb files';
  end;
end;




procedure TForm_Settings.btn_register_opfClick(Sender: TObject);
begin
  case RegisterExtension('.opf') of
    2:
      btn_register_opf.Caption := 'Register .opf files with OUP';
    1:
      btn_register_opf.Caption := 'Unregister .opf files';
  end;
end;




procedure TForm_Settings.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
begin
  CanClose      := False;
  Self.Visible  := False;
  Form_Main.Enabled := True;
  Form_Main.SetFocus;
end;




procedure TForm_Settings.FormShow(Sender: TObject);
var
  temps: String;
  i:     Byte;
begin
  if ExtensionRegistered('.dat', temps) then
    btn_register_dat.Caption := 'Unregister .dat files'
  else
    btn_register_dat.Caption := 'Register .dat files with OUP';
  if ExtensionRegistered('.oldb', temps) then
    btn_register_oldb.Caption := 'Unregister .oldb files'
  else
    btn_register_oldb.Caption := 'Register .oldb files with OUP';
  if ExtensionRegistered('.opf', temps) then
    btn_register_opf.Caption := 'Unregister .opf files'
  else
    btn_register_opf.Caption := 'Register .opf files with OUP';
  check_filesashex.Checked := AppSettings.FilenumbersAsHex;
  check_hideunused.Checked := AppSettings.HideUnusedData;

  for i := 0 to combo_charset.Items.Count - 1 do
    if StrToInt(MidStr(combo_charset.Items.Strings[i], Pos(
      ' ', combo_charset.Items.Strings[i]) + 3, Length(combo_charset.Items.Strings[i]) -
      Pos(' ', combo_charset.Items.Strings[i]) - 2)) = AppSettings.CharSet then
      combo_charset.ItemIndex := i;
end;

end.