How to add Arabic chars in flutter pdf generating

[alialdwahy]

Future generateQrCodeImage(String qrData) async {
final qrCode = QrPainter(
data: qrData,
version: QrVersions.auto,
gapless: true,
);
final picData = await qrCode.toImageData(120);
return picData!.buffer.asUint8List();
}

pw.Widget buildTextEn(String text, PdfColor color, double fontSize,
{pw.Font? font, pw.FontWeight fontWeight = pw.FontWeight.normal}) {
return pw.Text(
text,
style: pw.TextStyle(
color: color,
fontSize: fontSize,
fontWeight: fontWeight,
font: font,
),
);
}

pw.Widget buildTextAr(String text, PdfColor color, double fontSize,
{pw.Font? font,
required List<pw.Font> fontFallback,
pw.FontWeight fontWeight = pw.FontWeight.normal}) {
return pw.Text(
text,
textDirection: pw.TextDirection.rtl,
style: pw.TextStyle(
color: color,
fontSize: fontSize,
fontWeight: fontWeight,
fontFallback: fontFallback,
font: font,
),
);
}

pw.Widget buildSectionHeader(String englishText, String arabicText,
PdfColor backgroundColor, pw.Font arabicFont) {
return pw.Container(
decoration: pw.BoxDecoration(
color: backgroundColor,
borderRadius: pw.BorderRadius.circular(5.0),
),
child: pw.Padding(
padding: pw.EdgeInsets.fromLTRB(10.0, 2.0, 10.0, 2.0),
child: pw.Row(
mainAxisAlignment: pw.MainAxisAlignment.spaceBetween,
children: [
buildTextEn(englishText, PdfColors.white, 14.0,
fontWeight: pw.FontWeight.bold),
buildTextAr(arabicText, PdfColors.white, 14.0,
fontFallback: [arabicFont], fontWeight: pw.FontWeight.bold),
],
),
),
);
}

Future taxInvoicePdf(
String qrData,
double vatAmount,
double appAmount,
InvoiceRecord invoiceDoc,
CustomerCompaniesRecord customerCompanyDoc,
) async {
final qrImageData = await generateQrCodeImage(qrData);

final pdf = pw.Document();
final textGray = PdfColor.fromHex('#57636C');
final dividerColor = PdfColor.fromHex('#EAECF0');
final greenContainer = PdfColor.fromHex('#7C9587');
final arabi = await PdfGoogleFonts.tajawalBold();

pdf.addPage(
pw.Page(
build: (pw.Context context) {
return pw.Column(
mainAxisSize: pw.MainAxisSize.max,
crossAxisAlignment: pw.CrossAxisAlignment.start,
children: [
buildTextEn('Invoice ID: ${invoiceDoc.invoiceId}', textGray, 14.0),
pw.Padding(
padding: pw.EdgeInsetsDirectional.fromSTEB(0.0, 0.0, 0.0, 5.0),
child: buildTextEn(
'Date: ${DateFormat('yyyy-MM-dd').format(invoiceDoc.invoiceCreationDate!)}',
textGray,
14.0),
),

        pw.Divider(
          height: 1.0,
          thickness: 2.0,
          color: dividerColor,
        ),

        pw.Padding(
          padding: pw.EdgeInsetsDirectional.fromSTEB(0.0, 10.0, 0.0, 0.0),
          child: buildSectionHeader('Seller information', 'معلومات البائع',
              greenContainer, arabi),
        ),
        buildSellerDetailsSection(arabi),

        pw.SizedBox(height: 10),

        buildSectionHeader(
            'Buyer information', 'معلومات المشتري', greenContainer, arabi),
        buildBuyerDetailsSection(arabi, customerCompanyDoc),
        pw.SizedBox(height: 10),

        buildSectionHeader(
            'Product details', 'تفاصيل المنتج', greenContainer, arabi),
        pw.SizedBox(height: 5),

        buildProductTableDetailsSection(arabi, appAmount),

        buildProductDetailsSection(arabi, invoiceDoc, vatAmount, appAmount),
        pw.SizedBox(height: 15),

        // previous code

        pw.Row(
          mainAxisAlignment: pw.MainAxisAlignment.center,
          children: [
            pw.Container(
              width: 120,
              height: 120,
              child: pw.Image(
                pw.MemoryImage(qrImageData),
              ),
            ),
          ],
        ),
      ],
    );
  },
),

);

final bytes = await pdf.save();
return FFUploadedFile(
name: "taxInvoice_${invoiceDoc.invoiceId}", bytes: bytes);
}

pw.Widget buildSellerDetailsSection(pw.Font arabicFont) {
final textGray = PdfColor.fromHex('#57636C');
final dividerColor = PdfColor.fromHex('#EAECF0');

return pw.Padding(
padding: pw.EdgeInsetsDirectional.fromSTEB(5.0, 5.0, 5.0, 0.0),
child: pw.Column(
mainAxisSize: pw.MainAxisSize.max,
children: [
buildDetailsRow('Company Name :', ': اسم الشركة', arabicFont),
buildTextEn(
"Al-Rabt al-'Alami For Advertising Services", textGray, 10.0),
pw.Divider(height: 1.0, thickness: 2.0, color: dividerColor),
buildDetailsRow('Address :', ': العنوان', arabicFont),
buildTextEn('King Abdullah Bin Abdulaziz Rd', textGray, 10.0),
pw.Divider(height: 1.0, thickness: 2.0, color: dividerColor),
buildDetailsRow('VAT Number :', ': الرقم الضريبي', arabicFont),
buildTextEn('311274337100003', textGray, 10.0),
pw.Divider(height: 1.0, thickness: 2.0, color: dividerColor),
buildDetailsRow('Commercial Number :', ': رقم السجل التجاري', arabicFont),
buildTextEn('1010797959', textGray, 10.0),
pw.Divider(height: 1.0, thickness: 2.0, color: dividerColor),
],
),
);
}

pw.Widget buildBuyerDetailsSection(
pw.Font arabicFont, CustomerCompaniesRecord customerCompany) {
final textGray = PdfColor.fromHex('#57636C');
final dividerColor = PdfColor.fromHex('#EAECF0');

return pw.Padding(
padding: pw.EdgeInsetsDirectional.fromSTEB(5.0, 5.0, 5.0, 0.0),
child: pw.Column(
mainAxisSize: pw.MainAxisSize.max,
children: [
buildDetailsRow('Name :', ': اسم', arabicFont),
buildTextEn('${customerCompany.companyName}', textGray, 10.0),
pw.Divider(height: 1.0, thickness: 2.0, color: dividerColor),
buildDetailsRow('Address :', ': عنوان', arabicFont),
buildTextEn('${customerCompany.countryName}', textGray, 10.0),
pw.Divider(height: 1.0, thickness: 2.0, color: dividerColor),
buildDetailsRow('VAT Number :', ': الرقم الضريبي', arabicFont),
buildTextEn('${customerCompany.vATNumber}', textGray, 10.0),
pw.Divider(height: 1.0, thickness: 2.0, color: dividerColor),
buildDetailsRow('Commercial Number :', ': رقم السجل التجاري', arabicFont),
buildTextEn('${customerCompany.commercialNumber}', textGray, 10.0),
pw.Divider(height: 1.0, thickness: 2.0, color: dividerColor),
],
),
);
}

pw.Widget buildProductTableDetailsSection(pw.Font arabicFont, double price) {
final headerColor = PdfColor.fromHex('#F3F3F3');
final textGray = PdfColor.fromHex('#57636C');
final dividerColor = PdfColor.fromHex('#DBDBDB');

return pw.ClipRRect(
horizontalRadius: 5.0,
verticalRadius: 5.0,
child: pw.Table(
border:
pw.TableBorder.symmetric(inside: pw.BorderSide(color: dividerColor)),
children: [
pw.TableRow(
decoration: pw.BoxDecoration(
color: headerColor,
),
children: [
pw.Container(
padding: pw.EdgeInsets.all(5.0),
alignment: pw.Alignment.center,
child: pw.Row(
mainAxisAlignment: pw.MainAxisAlignment.start,
children: [
buildTextEn("Product ", PdfColors.black, 10.0,
fontWeight: pw.FontWeight.bold),
buildTextAr("منتج", PdfColors.black, 10.0,
fontFallback: [arabicFont],
fontWeight: pw.FontWeight.bold),
],
),
),
pw.Container(
padding: pw.EdgeInsets.all(5.0),
alignment: pw.Alignment.center,
child: pw.Row(
mainAxisAlignment: pw.MainAxisAlignment.start,
children: [
buildTextEn("Price ", PdfColors.black, 10.0,
fontWeight: pw.FontWeight.bold),
buildTextAr("سعر", PdfColors.black, 10.0,
fontFallback: [arabicFont],
fontWeight: pw.FontWeight.bold),
],
),
),
pw.Container(
padding: pw.EdgeInsets.all(5.0),
alignment: pw.Alignment.center,
child: pw.Row(
mainAxisAlignment: pw.MainAxisAlignment.start,
children: [
buildTextEn("Quantity ", PdfColors.black, 10.0,
fontWeight: pw.FontWeight.bold),
buildTextAr("كمية", PdfColors.black, 10.0,
fontFallback: [arabicFont],
fontWeight: pw.FontWeight.bold),
],
),
),
],
),
pw.TableRow(
decoration: pw.BoxDecoration(
color: headerColor,
),
children: [
pw.Padding(
padding: pw.EdgeInsets.all(5.0),
child: buildTextEn("Advertisement commission", textGray, 10.0),
),
pw.Padding(
padding: pw.EdgeInsets.all(5.0),
child: buildTextEn('$price', textGray, 10.0),
),
pw.Padding(
padding: pw.EdgeInsets.all(5.0),
child: buildTextEn("1", textGray, 10.0),
),
],
),
],
),
);
}

pw.Widget buildProductDetailsSection(
pw.Font arabicFont, InvoiceRecord invoice, double vat, double gt) {
final textGray = PdfColor.fromHex('#57636C');
final dividerColor = PdfColor.fromHex('#EAECF0');

return pw.Padding(
padding: pw.EdgeInsetsDirectional.fromSTEB(5.0, 5.0, 5.0, 0.0),
child: pw.Column(
mainAxisSize: pw.MainAxisSize.max,
children: [
buildDetailsRow(
'VAT percentage :', ': نسبة ضريبة القيمة المضافة', arabicFont),
buildTextEn('${invoice.invoiceVat2}%', textGray, 10.0),
pw.Divider(height: 1.0, thickness: 2.0, color: dividerColor),
buildDetailsRow(
'VAT value :', ': قيمة ضريبة القيمة المضافة', arabicFont),
buildTextEn('$vat', textGray, 10.0),
pw.Divider(height: 1.0, thickness: 2.0, color: dividerColor),
buildDetailsRow('Total without VAT :',
': الإجمالي بدون ضريبة القيمة المضافة', arabicFont),
buildTextEn('$gt', textGray, 10.0),
pw.Divider(height: 1.0, thickness: 2.0, color: dividerColor),
buildDetailsRow(
'Total with VAT :', ': الإجمالي مع ضريبة القيمة المضافة', arabicFont),
buildTextEn('${gt + vat}', textGray, 10.0),
pw.Divider(height: 1.0, thickness: 2.0, color: dividerColor),
],
),
);
}

pw.Widget buildDetailsRow(
String englishText, String arabicText, pw.Font arabicFont) {
englishText = englishText.replaceAll(":", '');
arabicText = arabicText.replaceAll(":", '');
return pw.Row(
mainAxisAlignment: pw.MainAxisAlignment.spaceBetween,
children: [
buildTextEn(englishText, PdfColors.black, 10.0,
fontWeight: pw.FontWeight.bold),
buildTextAr(arabicText, PdfColors.black, 10.0,
fontFallback: [arabicFont], fontWeight: pw.FontWeight.bold),
],
);
}