Write Persian Text to pdf via PDFBox

Question

I want to write persian text to pdf via PDFBox, however, pdfbox separates and reverse separated charachters. how should i fix that? ( i use pdfbox pdfbox-2.0.19 )

here is my code:

                 PDDocument doc = new PDDocument();
                 PDPage page = new PDPage(PDRectangle.A4);
                 doc.addPage(page);
                 PDPageContentStream cont = new PDPageContentStream(doc, page);
                 cont.beginText();
                 PDType0Font font = PDType0Font.load(doc, new File("C:\\Users\\farhad\\Downloads\\vazir-font-v24.1.0\\Vazir.ttf"));
                 int fontSize = 15;
                 cont.setFont(font, fontSize);
                 String text = "برنامه نویس ایرانی هست اینو بلد باشه؟";
                 float x =  50;
                 float y = page.getMediaBox().getHeight() / 2;
                 cont.newLineAtOffset(x, y);
                 cont.showText(text);
                 cont.endText();
                 cont.close();
                 doc.save("D:\\pdf.pdf");

and I atatched a screenshot which shows the result.

Answer 1

for those of you who seeking the answer of this question:

you should do some manipulation with Unicode characters. Every Persian character that you normally know (for example س ش ت ظ), actually has 4 different forms and each form has its own Unicode characters.

• initial form
• medial form
• final form
• isolated form

Let's say the word سا

in this case, the initial س has a Unicode character which is different than the س in راس which comes at the end of the word.

for better understanding, look at the picture below

how can you get Unicode characters of each form?

just go to this website https://www.compart.com/en/unicode/ and search your character.

please note that, Arabic and Persian almost use the same script, that's why in the picture that I uploaded, it says "Arabic letter Seen isolated form" for س character.

Here is a class that you can use to calculate 4 different forms of Persian characters:

 public class PersianCharachtersUnicode {

    char c;
    private String InitialFom_Unicode;
    private String MedialForm_Unicode;
    private String FinalForm_Unicode;
    private String IsolatedForm_Unicode;


    public void setCharc (char c) {
        this.c = c;
        calculate();
    }





    private void calculate() {

        switch (c) {

        case 'آ':

            InitialFom_Unicode    = "\0";
            MedialForm_Unicode    = "\0";
            FinalForm_Unicode     = "\0";
            IsolatedForm_Unicode  = "\uFE81";
            break;

        case 'ا':

            InitialFom_Unicode    = "\0";
            MedialForm_Unicode    = "\0";
            FinalForm_Unicode     = "\uFE8E";
            IsolatedForm_Unicode  = "\uFE8D";
            break;


        case 'ب':

            InitialFom_Unicode    = "\uFE91";
            MedialForm_Unicode    = "\uFE92";
            FinalForm_Unicode     = "\uFE90";
            IsolatedForm_Unicode  = "\uFE8F";
            break;


        case 'پ':

            InitialFom_Unicode    = "\uFB58";
            MedialForm_Unicode    = "\uFB59";
            FinalForm_Unicode     = "\uFB57";
            IsolatedForm_Unicode  = "\uFB56";
            break;


        case 'ت':

            InitialFom_Unicode    = "\uFE97";
            MedialForm_Unicode    = "\uFE98";
            FinalForm_Unicode     = "\uFE96";
            IsolatedForm_Unicode  = "\uFE95";
            break;


        case 'ث':

            InitialFom_Unicode    = "\uFE9B";
            MedialForm_Unicode    = "\uFE9C";
            FinalForm_Unicode     = "\uFE9A";
            IsolatedForm_Unicode  = "\uFE99";
            break;


        case 'ج':

            InitialFom_Unicode    = "\uFE9F";
            MedialForm_Unicode    = "\uFEA0";
            FinalForm_Unicode     = "\uFE9E";
            IsolatedForm_Unicode  = "\uFE9D";
            break;


        case 'چ':

            InitialFom_Unicode    = "\uFB7C";
            MedialForm_Unicode    = "\uFB7D";
            FinalForm_Unicode     = "\uFE9B";
            IsolatedForm_Unicode  = "\uFB7A";
            break;


        case 'ح':

            InitialFom_Unicode    = "\uFEA3";
            MedialForm_Unicode    = "\uFEA4";
            FinalForm_Unicode     = "\uFEA2";
            IsolatedForm_Unicode  = "\uFEA1";
            break;


        case 'خ':

            InitialFom_Unicode    = "\uFEA7";
            MedialForm_Unicode    = "\uFEA8";
            FinalForm_Unicode     = "\uFEA6";
            IsolatedForm_Unicode  = "\uFEA5";
            break;


        case 'د':

            InitialFom_Unicode    = "\0";
            MedialForm_Unicode    = "\0";
            FinalForm_Unicode     = "\uFEAA";
            IsolatedForm_Unicode  = "\uFEA9";
            break;


        case 'ذ':

            InitialFom_Unicode    = "\0";
            MedialForm_Unicode    = "\0";
            FinalForm_Unicode     = "\uFEAC";
            IsolatedForm_Unicode  = "\uFEAB";
            break;


        case 'ر':

            InitialFom_Unicode    = "\0";
            MedialForm_Unicode    = "\0";
            FinalForm_Unicode     = "\uFEAE";
            IsolatedForm_Unicode  = "\uFEAD";
            break;


        case 'ز':

            InitialFom_Unicode    = "\0";
            MedialForm_Unicode    = "\0";
            FinalForm_Unicode     = "\uFEB0";
            IsolatedForm_Unicode  = "\uFEAF";
            break;


        case 'ژ':

            InitialFom_Unicode    = "\0";
            MedialForm_Unicode    = "\0";
            FinalForm_Unicode     = "\uFB8B";
            IsolatedForm_Unicode  = "\uFB8A";
            break;


        case 'س':

            InitialFom_Unicode    = "\uFEB3";
            MedialForm_Unicode    = "\uFEB4";
            FinalForm_Unicode     = "\uFEB2";
            IsolatedForm_Unicode  = "\uFEB1";
            break;


        case 'ش':

            InitialFom_Unicode    = "\uFEB7";
            MedialForm_Unicode    = "\uFEB8";
            FinalForm_Unicode     = "\uFEB6";
            IsolatedForm_Unicode  = "\uFEB5";
            break;


        case 'ص':

            InitialFom_Unicode    = "\uFEBB";
            MedialForm_Unicode    = "\uFEBC";
            FinalForm_Unicode     = "\uFEBA";
            IsolatedForm_Unicode  = "\uFEB9";
            break;


        case 'ض':

            InitialFom_Unicode    = "\uFEBF";
            MedialForm_Unicode    = "\uFEC0";
            FinalForm_Unicode     = "\uFEBE";
            IsolatedForm_Unicode  = "\uFEBD";
            break;


        case 'ط':

            InitialFom_Unicode    = "\uFEC3";
            MedialForm_Unicode    = "\uFEC4";
            FinalForm_Unicode     = "\uFEC2";
            IsolatedForm_Unicode  = "\uFEC1";
            break;


        case 'ظ':

            InitialFom_Unicode    = "\uFEC7";
            MedialForm_Unicode    = "\uFEC8";
            FinalForm_Unicode     = "\uFEC6";
            IsolatedForm_Unicode  = "\uFEC5";
            break;


        case 'ع':

            InitialFom_Unicode    = "\uFECB";
            MedialForm_Unicode    = "\uFECC";
            FinalForm_Unicode     = "\uFECA";
            IsolatedForm_Unicode  = "\uFEC9";
            break;


        case 'غ':

            InitialFom_Unicode    = "\uFECF";
            MedialForm_Unicode    = "\uFED0";
            FinalForm_Unicode     = "\uFECE";
            IsolatedForm_Unicode  = "\uFECD";
            break;


        case 'ف':

            InitialFom_Unicode    = "\uFED3";
            MedialForm_Unicode    = "\uFED4";
            FinalForm_Unicode     = "\uFED2";
            IsolatedForm_Unicode  = "\uFED1";
            break;


        case 'ق':

            InitialFom_Unicode    = "\uFED7";
            MedialForm_Unicode    = "\uFED8";
            FinalForm_Unicode     = "\uFED6";
            IsolatedForm_Unicode  = "\uFED5";
            break;


        case 'ک':

            InitialFom_Unicode    = "\uFB90";
            MedialForm_Unicode    = "\uFB91";
            FinalForm_Unicode     = "\uFB8F";
            IsolatedForm_Unicode  = "\uFB8E";
            break;


        case 'گ':

            InitialFom_Unicode    = "\uFB94";
            MedialForm_Unicode    = "\uFB95";
            FinalForm_Unicode     = "\uFB93";
            IsolatedForm_Unicode  = "\uFB92";
            break;


        case 'ل':

            InitialFom_Unicode    = "\uFEDF";
            MedialForm_Unicode    = "\uFEE0";
            FinalForm_Unicode     = "\uFEDE";
            IsolatedForm_Unicode  = "\uFEDD";
            break;


        case 'م':

            InitialFom_Unicode    = "\uFEE3";
            MedialForm_Unicode    = "\uFEE4";
            FinalForm_Unicode     = "\uFEE2";
            IsolatedForm_Unicode  = "\uFEE1";
            break;


        case 'ن':

            InitialFom_Unicode    = "\uFEE7";
            MedialForm_Unicode    = "\uFEE8";
            FinalForm_Unicode     = "\uFEE6";
            IsolatedForm_Unicode  = "\uFEE5";
            break;


        case 'و':

            InitialFom_Unicode    = "\0";
            MedialForm_Unicode    = "\0";
            FinalForm_Unicode     = "\uFEEE";
            IsolatedForm_Unicode  = "\uFEED";
            break;


        case 'ه':

            InitialFom_Unicode    = "\uFEEB";
            MedialForm_Unicode    = "\uFEEC";
            FinalForm_Unicode     = "\uFEEA";
            IsolatedForm_Unicode  = "\uFEE9";
            break;


        case 'ی':

            InitialFom_Unicode    = "\uFBFE";
            MedialForm_Unicode    = "\uFBFF";
            FinalForm_Unicode     = "\uFBFD";
            IsolatedForm_Unicode  = "\uFBFC";
            break;


        default:
            break;
        }

    }




    /**
     * @return the initialFom_Unicode
     */
    public String getInitialFom_Unicode() {
        return InitialFom_Unicode;
    }

    /**
     * @return the finalForm_Unicode
     */
    public String getFinalForm_Unicode() {
        return FinalForm_Unicode;
    }

    /**
     * @return the isolatedForm_Unicode
     */
    public String getIsolatedForm_Unicode() {
        return IsolatedForm_Unicode;
    }

    /**
     * @return the medialForm_Unicode
     */
    public String getMedialForm_Unicode() {
        return MedialForm_Unicode;
    }
 }