TMainForm = class(TForm)
    btnSaveGroff: TButton;
    btnLoadGroff: TButton;
    btnBuild: TButton;
    btnDownloadGroffWindows: TButton;
    btnSaveSettings: TButton;
    chkUpdateCheckOnStart: TCheckBox;
    chkLogFile: TCheckBox;
    chkAutoSaveBuildSettings: TCheckBox;
    chkPdfMark: TCheckBox;
    chkRefer: TCheckBox;
    chkChem: TCheckBox;
    chkGrn: TCheckBox;
    chkTbl: TCheckBox;

    var currentGroffFileName: String;
    var hasGroff: Boolean;
    var unsavedChanges: Boolean;
{$IFDEF WINDOWS}
    var latestGroffWindowsUrl: String;
{$ENDIF}
    var storeBuildSettings: Boolean;
    var updateCheck: Boolean;
  public

  end;

var
  MainForm: TMainForm;
  BuildWindow: TBuildStatusWindow;

  end;

  // Restore the settings
  iniStorage.Restore;
  storeBuildSettings := iniStorage.ReadBoolean('AutoSaveBuildSettings', False);
  chkAutoSaveBuildSettings.Checked := storeBuildSettings;

  updateCheck := iniStorage.ReadBoolean('UpdateCheckOnStart', False);
  chkUpdateCheckOnStart.Checked := updateCheck;

  if storeBuildSettings then
  begin
       chkLogFile.Checked := iniStorage.ReadBoolean('BuildLogFile', False);
       cmbMacro.Text := iniStorage.ReadString('BuildChosenMacro', '[ select ]');
       chkChem.Checked := iniStorage.ReadBoolean('BuildUseChem', False);
       chkEqn.Checked := iniStorage.ReadBoolean('BuildUseEqn', False);
       chkGrn.Checked := iniStorage.ReadBoolean('BuildUseGrn', False);

  try
    FileVerInfo.ReadFileInfo;
    edtGroffStudioInstalledVersion.Text := FileVerInfo.VersionStrings.Values['FileVersion'];
    lblAboutProductName.Caption := FileVerInfo.VersionStrings.Values['ProductName'] + ' ' + FileVerInfo.VersionStrings.Values['FileVersion'];
    MainStatusBar.Panels[2].Text := '';

    {$IFDEF WINDOWS}
    if updateCheck then
    begin
      OnlineVersionsFile := TFPCustomHTTPClient.SimpleGet('https://groff.tuxproject.de/updates/versions.txt');

      // 1. groff update check
      reGroffVersion := TRegExpr.Create('groff-win ([\d\.]+) (.*)$');
      reGroffVersion.ModifierM := True;
      if reGroffVersion.Exec(OnlineVersionsFile) then
      begin
        edtOnlineGroffVersionWindows.Text := reGroffVersion.Match[1];
        latestGroffWindowsUrl := reGroffVersion.Match[2];
      end else begin
        edtOnlineGroffVersionWindows.Text := 'error';
        btnDownloadGroffWindows.Enabled := False;
      end;

      // 2. groffstudio update check
      reGroffStudioVersion := TRegExpr.Create('studio-win ([\d\.]+) (.*)$');
      reGroffStudioVersion.ModifierM := True;
      if reGroffStudioVersion.Exec(OnlineVersionsFile) then
      begin
        // Compare the two versions - ours and the online one:
        GroffHelpers.VerStrCompare(reGroffStudioVersion.Match[1], FileVerInfo.VersionStrings.Values['FileVersion'], HasVersionUpdate);
        if HasVersionUpdate > 0 then
          MainStatusBar.Panels[2].Text := 'update ' + reGroffStudioVersion.Match[1] + ' available';
      end;
    end else begin
        edtOnlineGroffVersionWindows.Text := 'n/a';
        btnDownloadGroffWindows.Enabled := False;
    end;
    {$ELSE}
    // Non-Windows platforms won't need some of that.
    {$IFDEF DARWIN}
    // What's the latest available version?
    try



      if updateCheck then



      begin
        HTTPClient := TFPHTTPClient.Create(Nil);
        HTTPClient.OnGetSocketHandler := @GetSocketHandler;
        OnlineVersionsFile := HTTPClient.SimpleGet('https://groff.tuxproject.de/updates/versions.txt');

        reGroffStudioVersion := TRegExpr.Create('studio-macos ([\d\.]+) (.*)$');
        reGroffStudioVersion.ModifierM := True;
        if reGroffStudioVersion.Exec(OnlineVersionsFile) then
        begin
          // Compare the two versions - ours and the online one:
          GroffHelpers.VerStrCompare(reGroffStudioVersion.Match[1], FileVerInfo.VersionStrings.Values['FileVersion'], HasVersionUpdate);
          if HasVersionUpdate > 0 then
            MainStatusBar.Panels[2].Text := 'update ' + reGroffStudioVersion.Match[1] + ' available'
          else
            MainStatusBar.Panels[2].Text := IntToStr(HasVersionUpdate);
        end;
      end else begin
        edtOnlineGroffVersionWindows.Text := 'n/a';
        btnDownloadGroffWindows.Enabled := False;
      end;
    finally
      if updateCheck then HTTPClient.Free;
    end;
    {$ENDIF}
    edtOnlineGroffVersionWindows.Text := 'n/a';
    btnDownloadGroffWindows.Enabled := False;
  {$ENDIF}
  finally
    FileVerInfo.Free;

  iniStorage.WriteBoolean('BuildUseTbl', chkTbl.Checked);
  iniStorage.WriteBoolean('BuildUsePdfMark', chkPdfMark.Checked);
  iniStorage.WriteBoolean('BuildToPostscript', rdPs.Checked);
  iniStorage.WriteBoolean('BuildToPDF', rdPDF.Checked);

  // Store the IDE settings:
  iniStorage.WriteBoolean('AutoSaveBuildSettings', chkAutoSaveBuildSettings.Checked);
  iniStorage.WriteBoolean('AutoUpdateCheck', chkUpdateCheckOnStart.Checked);

  iniStorage.Save;
end;

procedure TMainForm.FormClose(Sender: TObject; var CloseAction: TCloseAction);
var
  Reply, BoxStyle: Integer;