interface

uses
  Classes, SysUtils, Forms, Controls, Graphics, Dialogs, ComCtrls, StdCtrls,
  ExtCtrls, Buttons, ExtendedNotebook, SynEdit, fphttpclient, RegExpr, LCLIntf,
  LCLType, IniPropStorage, ComboEx, Process, Helpers, fileinfo,
{$IF DEFINED(WINDOWS)}
  winpeimagereader, opensslsockets,
{$ELSEIF DEFINED(DARWIN)}
  machoreader, ssockets, sslsockets, sslbase, opensslsockets,
{$ELSEIF DEFINED(LINUX)}
  elfreader,
{$ENDIF}
  BuildOutputWindow;

type

  { TMainForm }

  TMainForm = class(TForm)

    chkBoxPreprocessors: TCheckComboBox;
    chkUpdateCheckOnStart: TCheckBox;
    chkLogFile: TCheckBox;
    chkAutoSaveBuildSettings: TCheckBox;
    cmbMacro: TComboBox;
    edtGroffInstalledVersion: TEdit;
    edtGroffstudioInstalledVersion: TEdit;
    edtGhostscriptInstalledVersion: TEdit;
    edtOnlineGroffVersionWindows: TEdit;
    ExtendedNotebook1: TExtendedNotebook;
    GroupBox1: TGroupBox;
    GroupBox2: TGroupBox;
    GroupBox3: TGroupBox;
    iniStorage: TIniPropStorage;
    Label1: TLabel;
    Label10: TLabel;
    Label11: TLabel;
    Label12: TLabel;
    Label13: TLabel;
    Label14: TLabel;
    Label15: TLabel;
    lblGithubRepo: TLabel;
    lblFossilRepo: TLabel;
    lblWebsite: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;

    procedure chkUseGhostscriptChange(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);
{$IFDEF DARWIN}
    procedure GetSocketHandler(Sender: TObject; const UseSSL: Boolean; out AHandler: TSocketHandler);
{$ENDIF}
  private
  var
    currentGroffFilePath: string;
    currentGroffFileName: string;
    unsavedChanges: boolean;
{$IFDEF WINDOWS}
    latestGroffWindowsUrl: String;
{$ENDIF}
    // Settings:
    storeBuildSettings: boolean;
    updateCheck: boolean;
  public

  end;

var
  MainForm: TMainForm;
  BuildWindow: TBuildStatusWindow;
  hasGroff: boolean;
  hasGhostscript: boolean;
  GroffOutputVersion: string;
  ps2pdfOutput: string;
  GhostscriptOutputVersion: string;

implementation

{$R *.lfm}

procedure TDetectGroffThread.UpdateUI;
begin

    hasGroff := True;
    MainForm.edtGroffInstalledVersion.Text := GroffOutputVersion;
  end;

  // Try to find ps2pdf:
  if pos('ps2pdf', ps2pdfOutput) = 0 then
  begin
{$IFDEF WINDOWS}
    // ps2pdf is mandatory on Windows.
    ShowMessage('On Windows, for creating PDF files, you need Ghostscript installed.'
    + LineEnding + 'Sadly, groffstudio could not find ps2pdf.bat in your %PATH%, so '
    + 'writing PDF files will not be supported. Please install Ghostscript and make sure '
    + 'that the folder that contains ps2pdf.bat is in your %PATH%.');
    MainForm.rdPdf.Enabled := False;
{$ENDIF}
    hasGhostscript := False;
    MainForm.chkUseGhostscript.Checked := False;
    MainForm.chkUseGhostscript.Enabled := False;
  end
  else
  begin
    hasGhostscript := True;
{$IFDEF WINDOWS}
    MainForm.rdPdf.Enabled := True;
    MainForm.chkUseGhostscript.Checked := True;
{$ENDIF}
    MainForm.chkUseGhostscript.Enabled := True;
  end;

  // Try to find Ghostscript, just for displaying the version:
  if hasGhostscript then
    MainForm.edtGhostscriptInstalledVersion.Text := GhostscriptOutputVersion
  else
    MainForm.edtGhostscriptInstalledVersion.Text := 'n/a';
end;

procedure TDetectGroffThread.Execute;
begin
  FreeOnTerminate := True;

{$IFDEF WINDOWS}
  RunCommand('cmd', ['/c', 'troff --version'], GroffOutputVersion, [], swoHIDE);
  RunCommand('cmd', ['/c', 'gs --version'], GhostscriptOutputVersion, [], swoHIDE);
  RunCommand('cmd', ['/c', 'ps2pdf'], ps2pdfOutput, [], swoHIDE);
{$ELSE}
  RunCommand('/bin/sh', ['-c', 'troff --version'], GroffOutputVersion,
    [], swoHIDE);
  RunCommand('/bin/sh', ['-c', 'gs --version'], GhostscriptOutputVersion,
    [], swoHIDE);
  RunCommand('/bin/sh', ['-c', 'ps2pdf'], ps2pdfOutput, [], swoHIDE);
{$ENDIF}
  Synchronize(@UpdateUI);
end;

{ TMainForm }

procedure TMainForm.FormCreate(Sender: TObject);
var
  OnlineVersionsFile: string;
{$IFDEF WINDOWS}
  reGroffVersion: TRegExpr;
{$ENDIF}
  reGroffStudioVersion: TRegExpr;
  FileVerInfo: TFileVersionInfo;
  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);
  try
    mLicense.Lines.LoadFromStream(ResStream);
  finally
    ResStream.Free;
  end;

{$IFNDEF WINDOWS}
  // Ghostscript is not optional on Windows.
  // On other platforms, let's use the stored setting.
  chkUseGhostscript.Checked := iniStorage.ReadBoolean('UseGhostscript', False);
{$ENDIF}

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

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

    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 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);

      end;
    finally
      if updateCheck then HTTPClient.Free;
    end;
    {$ENDIF}
    edtOnlineGroffVersionWindows.Text := 'n/a';
    btnDownloadGroffWindows.Enabled := False;
{$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
{$IFDEF WINDOWS}
   // On other systems, the button is disabled anyway.
   OpenURL(latestGroffWindowsUrl);
{$ENDIF}
end;

procedure TMainForm.btnBuildClick(Sender: TObject);
var
  buildSuccess: boolean;
  buildOpts: string;
  logFileName: string = '';

  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:
{$IFNDEF WINDOWS}
  // On Windows, we use a two-step program:
  // 1) Output to PostScript,
  // 2) ps2pdf to PDF.
  // This is because there is no pdfroff.exe. Requires Ghostscript.
  if rdPdf.Checked and not chkUseGhostscript.Checked then
  begin
    buildOpts := buildOpts + ' -Tpdf';
    if chkBoxExtras.Checked[1] then buildOpts := buildOpts + ' -mpdfmark';
    outputFileName := currentGroffFilePath + '.pdf';
  end
  else
{$ENDIF}
    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);

{$IFDEF WINDOWS}
  if buildSuccess and hasGhostscript and rdPdf.Checked then
{$ELSE}
  // On non-Windows systems, Ghostscript is entirely optional.
  if buildSuccess and hasGhostscript and chkUseGhostscript.Checked and rdPdf.Checked then
{$ENDIF}
  begin
    // Invoke ps2pdf:
    buildOpts := 'ps2pdf';
    // outputFileName is still the .ps file. Just use it as the input name.
    buildOpts := buildOpts + ' ' + outputFileName;
    buildSuccess := BuildWindow.BuildDocument(buildOpts, logFileName);

    if buildSuccess and not chkKeepPostscriptFile.Checked then
       DeleteFile(outputFileName); // get rid of the .ps file
  end;

  if buildSuccess then
    MainStatusBar.Panels[1].Text := 'build successful'
  else
    MainStatusBar.Panels[1].Text := 'build problem';