procedure btnSaveSettingsClick(Sender: TObject);
    procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
    procedure FormCreate(Sender: TObject);
    procedure lblFossilRepoClick(Sender: TObject);
    procedure lblGithubRepoClick(Sender: TObject);
    procedure lblWebsiteClick(Sender: TObject);
    procedure SynEdit1Change(Sender: TObject);
{$IFDEF DARWIN}
    {$IFDEF DARWIN}
    procedure GetSocketHandler(Sender: TObject; const UseSSL: Boolean; out AHandler: TSocketHandler);
{$ENDIF}
    {$ENDIF}
  private
  var
    var currentGroffFilePath: String;
    var currentGroffFileName: String;
    var unsavedChanges: Boolean;
{$IFDEF WINDOWS}
    var latestGroffWindowsUrl: String;
{$ENDIF}
    var storeBuildSettings: Boolean;
    var updateCheck: Boolean;
    currentGroffFilePath: string;
    currentGroffFileName: string;
    unsavedChanges: boolean;
    {$IFDEF WINDOWS}
    atestGroffWindowsUrl: String;
    {$ENDIF}
    storeBuildSettings: boolean;
    updateCheck: boolean;
  public

  end;

  TDetectGroffThread = class(TThread)
  private
    procedure UpdateUI;
  protected
    procedure Execute; Override;
    procedure Execute; override;
  end;

var
  MainForm: TMainForm;
  BuildWindow: TBuildStatusWindow;
  hasGroff: Boolean;
  hasGroff: boolean;
  GroffOutputVersion: string;

implementation

{$R *.lfm}

procedure TDetectGroffThread.Execute;
procedure TDetectGroffThread.UpdateUI;
var
  GroffOutputVersion: String;
begin
  MainForm.edtGroffInstalledVersion.Text := GroffOutputVersion;
  if pos('GNU', GroffOutputVersion) = 0 then
  begin
    ShowMessage('groffstudio thinks that your installed version of troff is not GNU troff.'
      + LineEnding + 'If this is correct, you are advised to fix this before continuing.'
      + LineEnding +
      'If it is an error, please tell me so I can improve this detection.');
    hasGroff := True;
  end
  else
  begin
    MainForm.edtGroffInstalledVersion.Text := 'n/a';
    hasGroff := False;
    MainForm.lblTroffCommandNotFound.Visible := True;
  end;
end;

procedure TDetectGroffThread.Execute;
begin
  FreeOnTerminate := True;

  {$IFDEF WINDOWS}
  if RunCommand('cmd', ['/c', 'troff --version'], GroffOutputVersion, [], swoHIDE) then
  {$ELSE}
  if RunCommand('/bin/sh', ['-c', 'troff --version'], GroffOutputVersion, [], swoHIDE) then
  if RunCommand('/bin/sh', ['-c', 'troff --version'], GroffOutputVersion,
    [], swoHIDE) then
  {$ENDIF}
  begin
    MainForm.edtGroffInstalledVersion.Text := GroffOutputVersion;
    if pos('GNU', GroffOutputVersion) = 0 then
       ShowMessage('groffstudio thinks that your installed version of troff is not GNU troff.' + LineEnding +
       'If this is correct, you are advised to fix this before continuing.' + LineEnding +
       'If it is an error, please tell me so I can improve this detection.');
    hasGroff := True;
    Synchronize(@UpdateUI);
  end else begin
    MainForm.edtGroffInstalledVersion.Text := 'n/a';
    hasGroff := False;
    MainForm.lblTroffCommandNotFound.Visible := True;
  end;
end;

{ TMainForm }

procedure TMainForm.FormCreate(Sender: TObject);
var
  OnlineVersionsFile: String;
  OnlineVersionsFile: string;
  {$IFDEF WINDOWS}
  reGroffVersion: TRegExpr;
  {$ENDIF}
  reGroffStudioVersion: TRegExpr;
  FileVerInfo: TFileVersionInfo;
  HasVersionUpdate: Integer;
  HasVersionUpdate: integer;
  GroffHelpers: TGroffHelpers;
  ResStream: TResourceStream;
  {$IFDEF DARWIN}
  HTTPClient: TFPHttpClient;
  {$ENDIF}
begin
  // What's the current running groff version?
  TDetectGroffThread.Create(False);

  // Default file name
  currentGroffFileName := '[unsaved file]';

  // Embed the license
  ResStream:= TResourceStream.Create(HInstance, 'LICENSE', RT_RCDATA);
  ResStream := TResourceStream.Create(HInstance, 'LICENSE', RT_RCDATA);
  try
    mLicense.Lines.LoadFromStream(ResStream);
  finally
    ResStream.Free;
  end;

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

{$IF DEFINED(LINUX) OR DEFINED(BSD)}
  {$IF DEFINED(LINUX) OR DEFINED(BSD)}
  // On platforms which probably use a package manager (currently, Linux and
  // BSDs), the "update check" checkbox is disabled.
  chkUpdateCheckOnStart.Enabled := False;
{$ELSE}
  {$ELSE}
  updateCheck := iniStorage.ReadBoolean('UpdateCheckOnStart', False);
  chkUpdateCheckOnStart.Checked := updateCheck;
{$ENDIF}
  {$ENDIF}

  if storeBuildSettings then
  begin
       chkLogFile.Checked := iniStorage.ReadBoolean('BuildLogFile', False);
       cmbMacro.Text := iniStorage.ReadString('BuildChosenMacro', '[ select ]');
       chkBoxPreprocessors.Checked[0] := iniStorage.ReadBoolean('BuildUseChem', False);
       chkBoxPreprocessors.Checked[1] := iniStorage.ReadBoolean('BuildUseEqn', False);
       chkBoxPreprocessors.Checked[2] := iniStorage.ReadBoolean('BuildUseGrn', False);
       chkBoxPreprocessors.Checked[3] := iniStorage.ReadBoolean('BuildUsePic', False);
       chkBoxPreprocessors.Checked[4] := iniStorage.ReadBoolean('BuildUseRefer', False);
       chkBoxPreprocessors.Checked[5] := iniStorage.ReadBoolean('BuildUseTbl', False);
       chkBoxExtras.Checked[0] := iniStorage.ReadBoolean('BuildUseHdtbl', False);
       chkBoxExtras.Checked[1] := iniStorage.ReadBoolean('BuildUsePdfMark', False);
       rdPs.Checked := iniStorage.ReadBoolean('BuildToPostscript', False);
       rdPdf.Checked := iniStorage.ReadBoolean('BuildToPDF', False);
    chkLogFile.Checked := iniStorage.ReadBoolean('BuildLogFile', False);
    cmbMacro.Text := iniStorage.ReadString('BuildChosenMacro', '[ select ]');
    chkBoxPreprocessors.Checked[0] := iniStorage.ReadBoolean('BuildUseChem', False);
    chkBoxPreprocessors.Checked[1] := iniStorage.ReadBoolean('BuildUseEqn', False);
    chkBoxPreprocessors.Checked[2] := iniStorage.ReadBoolean('BuildUseGrn', False);
    chkBoxPreprocessors.Checked[3] := iniStorage.ReadBoolean('BuildUsePic', False);
    chkBoxPreprocessors.Checked[4] := iniStorage.ReadBoolean('BuildUseRefer', False);
    chkBoxPreprocessors.Checked[5] := iniStorage.ReadBoolean('BuildUseTbl', False);
    chkBoxExtras.Checked[0] := iniStorage.ReadBoolean('BuildUseHdtbl', False);
    chkBoxExtras.Checked[1] := iniStorage.ReadBoolean('BuildUsePdfMark', False);
    rdPs.Checked := iniStorage.ReadBoolean('BuildToPostscript', False);
    rdPdf.Checked := iniStorage.ReadBoolean('BuildToPDF', False);
  end;

  // What's the latest available version?
  FileVerInfo := TFileVersionInfo.Create(nil);

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

      end;
    finally
      if updateCheck then HTTPClient.Free;
    end;
    {$ENDIF}
    edtOnlineGroffVersionWindows.Text := 'n/a';
    btnDownloadGroffWindows.Enabled := False;
  {$ENDIF}
    {$ENDIF}
  finally
    FileVerInfo.Free;
  end;

  // Loaded file display
  MainStatusBar.Panels[0].Text := '';

  // Set the "Changed" mark:
  MainStatusBar.Panels[0].Text := '* ' + currentGroffFileName;
  unsavedChanges := True;
end;

procedure TMainForm.btnDownloadGroffWindowsClick(Sender: TObject);
begin
   {$IFDEF WINDOWS}
  {$IFDEF WINDOWS}
   // On other systems, the button is disabled anyway.
   OpenURL(latestGroffWindowsUrl);
   {$ENDIF}
  {$ENDIF}
end;

procedure TMainForm.btnBuildClick(Sender: TObject);
var
  buildSuccess: Boolean;
  buildOpts: String;
  logFileName: String = '';
  outputFileName: String;
  buildSuccess: boolean;
  buildOpts: string;
  logFileName: string = '';
  outputFileName: string;
begin
  // Reset status display:
  MainStatusBar.Panels[1].Text := '';

  BuildWindow := TBuildStatusWindow.Create(Application);
  BuildWindow.Show;

  // Build the parameters:
  buildOpts := 'groff';

  // - Macro:
  if LeftStr(cmbMacro.Text, 1) = 'm' then buildOpts := buildOpts + ' -' + cmbMacro.Text;

  // - Enforce UTF-8:
  buildOpts := buildOpts + ' -Kutf8';

  // - Preprocessors:
  if chkBoxPreprocessors.Checked[0] then   buildOpts := buildOpts + ' -chem';
  if chkBoxPreprocessors.Checked[1] then   buildOpts := buildOpts + ' -eqn';
  if chkBoxPreprocessors.Checked[2] then   buildOpts := buildOpts + ' -grn';
  if chkBoxPreprocessors.Checked[3] then   buildOpts := buildOpts + ' -pic';
  if chkBoxPreprocessors.Checked[4] then   buildOpts := buildOpts + ' -refer';
  if chkBoxPreprocessors.Checked[5] then   buildOpts := buildOpts + ' -tbl';
  if chkBoxPreprocessors.Checked[0] then  buildOpts := buildOpts + ' -chem';
  if chkBoxPreprocessors.Checked[1] then  buildOpts := buildOpts + ' -eqn';
  if chkBoxPreprocessors.Checked[2] then  buildOpts := buildOpts + ' -grn';
  if chkBoxPreprocessors.Checked[3] then  buildOpts := buildOpts + ' -pic';
  if chkBoxPreprocessors.Checked[4] then  buildOpts := buildOpts + ' -refer';
  if chkBoxPreprocessors.Checked[5] then  buildOpts := buildOpts + ' -tbl';

  if chkBoxExtras.Checked[0] then  buildOpts := buildOpts + ' -mhdtbl';

  // - PDF-specifics:
  if rdPdf.Checked then begin
  if rdPdf.Checked then
  begin
    buildOpts := buildOpts + ' -Tpdf';
    if chkBoxExtras.Checked[1] then buildOpts := buildOpts + ' -mpdfmark';
    outputFileName := currentGroffFilePath + '.pdf';
  end
  else
  else outputFileName := currentGroffFilePath + '.ps';
    outputFileName := currentGroffFilePath + '.ps';

  // - Input file:
  buildOpts := buildOpts + ' ' + currentGroffFilePath;
  buildOpts := buildOpts + ' > ' + outputFileName;

  // - Log file:
  if chkLogFile.Checked then logFileName := currentGroffFilePath + '.log';

  // Build:
  buildSuccess := BuildWindow.BuildDocument(buildOpts, logFileName);
  if buildSuccess then
    MainStatusBar.Panels[1].Text := 'build successful'
  else
    MainStatusBar.Panels[1].Text := 'build problem';

  FreeAndNil(BuildWindow);
end;

procedure TMainForm.btnLoadGroffClick(Sender: TObject);
var
  Reply, BoxStyle: Integer;
  Reply, BoxStyle: integer;
begin
  // If the current file has unsaved changes, ask first.
  if unsavedChanges then with Application do begin
    BoxStyle := MB_ICONQUESTION + MB_YESNO;
    Reply := MessageBox('Do you want to save the document first?', 'UnsavedChanges', BoxStyle);
    if Reply = IDYES then SynEdit1.Lines.SaveToFile(currentGroffFilePath);
    unsavedChanges := False;
  end;
  if unsavedChanges then with Application do
    begin
      BoxStyle := MB_ICONQUESTION + MB_YESNO;
      Reply := MessageBox('Do you want to save the document first?',
        'UnsavedChanges', BoxStyle);
      if Reply = idYes then SynEdit1.Lines.SaveToFile(currentGroffFilePath);
      unsavedChanges := False;
    end;

  if odOpenGroffFile.Execute then
  begin
    if FileExists(odOpenGroffFile.FileName) then
    begin
      currentGroffFilePath := odOpenGroffFile.FileName;
      currentGroffFileName := ExtractFileName(odOpenGroffFile.FileName);

    SynEdit1.Lines.SaveToFile(currentGroffFilePath)
  else if sdSaveGroffFile.Execute then
  begin
    currentGroffFilePath := sdSaveGroffFile.FileName;
    currentGroffFileName := ExtractFileName(currentGroffFilePath);
    SynEdit1.Lines.SaveToFile(sdSaveGroffFile.FileName);

    if hasGroff then begin
    if hasGroff then
    begin
      btnBuild.Enabled := True;
      chkLogFile.Enabled := True;
    end;
  end;

  // Remove the "Changed" mark:
  MainStatusBar.Panels[0].Text := currentGroffFileName;

  iniStorage.WriteBoolean('AutoUpdateCheck', chkUpdateCheckOnStart.Checked);

  iniStorage.Save;
end;

procedure TMainForm.FormClose(Sender: TObject; var CloseAction: TCloseAction);
var
  Reply, BoxStyle: Integer;
  Reply, BoxStyle: integer;
begin
  // If the current file has unsaved changes, ask first.
  if unsavedChanges then
  with Application do begin
    BoxStyle := MB_ICONQUESTION + MB_YESNO;
    Reply := MessageBox('Do you want to save the document first?', 'UnsavedChanges', BoxStyle);
    if Reply = IDYES then btnSaveGroffClick(Sender);
  end;
    with Application do
    begin
      BoxStyle := MB_ICONQUESTION + MB_YESNO;
      Reply := MessageBox('Do you want to save the document first?',
        'UnsavedChanges', BoxStyle);
      if Reply = idYes then btnSaveGroffClick(Sender);
    end;
end;

{$IFDEF DARWIN}
// Fix HTTPS on macOS:
procedure TMainForm.GetSocketHandler(Sender: TObject; const UseSSL: Boolean; out AHandler: TSocketHandler);
begin
  if UseSSL then begin
    AHandler := TSSLSocketHandler.Create;
    TSSLSocketHandler(AHandler).SSLType := stTLSv1_2;
  end else AHandler := TSocketHandler.Create;
end;
{$ENDIF}

end.