Question

Since I just asked this question and got a very useful reply I wonder if anyone has already the code for using the documentTopdf routine built in in Open Office for saving odt, doc, docx files to pdf.

Here there is the c# example anyway since having it in Delphi direcly would be great for many users.

Answer 1

Very similarly 🙂

Here is the tutorial describing all features used for configuration of the generated document.

For the following example I chose fit to width magnification, password protection and hidden window controls. The export is done in hidden mode when the OpenOffice window isn’t shown at conversion.

Note that the following code is again without error handling.

uses
  ComObj;

procedure OpenOfficeExportToPDF(const ASourceFileURL: string; const ATargetFileURL: string);
var
  StarOffice: Variant;
  StarDesktop: Variant;
  StarDocument: Variant;
  FilterParams: Variant;
  ExportParams: Variant;
  ExportObject: Variant;

  function CreateProperty(const AName: AnsiString; AValue: Variant): Variant;
  begin
    Result := StarOffice.Bridge_GetStruct('com.sun.star.beans.PropertyValue');
    Result.Name := AName;
    Result.Value := AValue;
  end;

begin
  StarOffice := CreateOleObject('com.sun.star.ServiceManager');
  StarDesktop := StarOffice.CreateInstance('com.sun.star.frame.Desktop');

  FilterParams := VarArrayCreate([0, 0], varVariant);
  FilterParams[0] := CreateProperty('Hidden', True);

  StarDocument := StarDesktop.LoadComponentFromURL(ASourceFileURL, '_blank', 0, FilterParams);

  ExportParams := VarArrayCreate([0, 3], varVariant);
  ExportParams[0] := CreateProperty('Magnification', 2);
  ExportParams[1] := CreateProperty('EncryptFile', True);
  ExportParams[2] := CreateProperty('DocumentOpenPassword', AnsiString('StackOverflow'));
  ExportParams[3] := CreateProperty('HideViewerWindowControls', True);

  ExportObject := StarOffice.Bridge_GetValueObject;
  ExportObject.Set('[]com.sun.star.beans.PropertyValue', ExportParams);

  FilterParams := VarArrayCreate([0, 1], varVariant);
  FilterParams[0] := CreateProperty('FilterName', AnsiString('writer_pdf_Export'));
  FilterParams[1] := CreateProperty('FilterData', ExportObject);

  StarDocument.StoreToURL(ATargetFileURL, FilterParams);

  StarDocument.Close(True);
  StarDesktop.Terminate;

  StarDocument := Unassigned;
  StarDesktop := Unassigned;
  StarOffice := Unassigned;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  OpenOfficeExportToPDF('file:///C:/SourceFile.odt', 'file:///C:/TargetFile.pdf');
end;