HtmlWorkerTests.cs

using System.IO;
using System.util;
using iTextSharp.LGPLv2.Core.FunctionalTests.iTextExamples;
using iTextSharp.text;
using iTextSharp.text.html;
using iTextSharp.text.html.simpleparser;
using iTextSharp.text.pdf;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace iTextSharp.LGPLv2.Core.FunctionalTests;

[TestClass]
public class HtmlWorkerTests
{
    [TestMethod]
    public void Verify_Base64_Images_CanBe_Processed()
    {
        var pdfFilePath = TestUtils.GetOutputFileName();
        using (var fileStream = new FileStream(pdfFilePath, FileMode.Create))
        {
            using (var pdfDoc = new Document(PageSize.A4))
            {
                PdfWriter.GetInstance(pdfDoc, fileStream);

                pdfDoc.AddAuthor(TestUtils.Author);
                pdfDoc.Open();

                FontFactory.Register(TestUtils.GetTahomaFontPath());


                var html =
                    "<img alt='' src='data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAodJREFUeNpsk0tME1EUhv87UwlCREhRFpi4cGMMRrTE4MaoxBhAsDyMssFHfCQu3BlXGuNKNy5NmqALoqEEMJWCgEUjYojllSpofIUNBNqmIKU6OnQennunUxvgJF86957z/+d27hkGigMlDJfOAmV7AcYsKGqIZljRSvhNE+CMTwEtXmBy2gQb7mCQJUBKkTIQYtfJYCNMAxO9hzq5CYmFiWFY6ISE9VFLRedc1SONeqwf+uJLuKreNPI9nltbLG0orhpqUCM90DRVoEbJ5MSLho1MMg1O0bHOuyoD9crCcxL+xa0HqwL+rEQHsb/CW89reO1aAyEuq+yp+zXvg66rgng8LrDXSmwYpUc8dZkmDsJNL+NCeVVXbWK+O32cpJ7E6OgkwuEwrl8phaHrVsfYD+x03XTPjN3nzZnD0HGxvPppTSLcLwo0I4lldRFK8jdCoZBlJquAbBnr0BD9GUTRvubahclW5qDukqkpIqlodGQ1At3UxZXaIUvauqsyjBV+jZJEJ3s83HO5j+UWI7E6C4mp2EQCTixyV2CvbbKzNmN2zNfHtbzPM3p4FOy/M5CXtwsOKZmmsOi2IHMvyyFhJhgY4BqutQ/aRRstocEngZzswnQnO+x1lqTjy8hIgNdyDc+x5nomxrKJhpcSp2lSrx48WlZhGArynG5hsLLoE7/jQ59f0aR7ZBkdbf7U6Ge+mKYaBvdx8wwZXjtWvfswfTrp3Over29J8NAXYO1t/v/7csZA5U5/Q35nH+aKt8OMR2POPSUFOyRmorvje3BiCt4b9zBANTmwGvP/aMoZRluJbURB8APmnPlQliNLzk8flxbeh9Du8eId5bYQ2SnxH36b/wQYABNFRsIaESsTAAAAAElFTkSuQmCC' />";

                var styles = new StyleSheet();

                var pdfCell = new PdfPCell
                              {
                                  Border = 0,
                                  RunDirection = PdfWriter.RUN_DIRECTION_LTR,
                              };

                using (var reader = new StringReader(html))
                {
                    var parsedHtmlElements = HtmlWorker.ParseToList(reader, styles);
                    foreach (var htmlElement in parsedHtmlElements)
                    {
                        pdfCell.AddElement(htmlElement);
                    }
                }

                var table1 = new PdfPTable(1);
                table1.AddCell(pdfCell);
                pdfDoc.Add(table1);
            }
        }

        TestUtils.VerifyPdfFileIsReadable(pdfFilePath);
    }

    [TestMethod]
    public void Verify_Unicode_Html_To_Pdf_CanBeCreated()
    {
        var pdfFilePath = TestUtils.GetOutputFileName();
        using (var stream = new FileStream(pdfFilePath, FileMode.Create))
        {
            // create a StyleSheet
            var styles = new StyleSheet();
            // set the default font's properties
            styles.LoadTagStyle(HtmlTags.BODY, "encoding", "Identity-H");
            styles.LoadTagStyle(HtmlTags.BODY, HtmlTags.FONT, "Tahoma");
            styles.LoadTagStyle(HtmlTags.BODY, "size", "16pt");


            FontFactory.Register(TestUtils.GetTahomaFontPath());

            var unicodeFontProvider = FontFactoryImp.Instance;
            unicodeFontProvider.DefaultEmbedding = BaseFont.EMBEDDED;
            unicodeFontProvider.DefaultEncoding = BaseFont.IDENTITY_H;

            var props = new NullValueDictionary<string, object>
                        {
                            { "img_provider", new MyImageFactory() },
                            { "font_factory", unicodeFontProvider }, // Always use Unicode fonts
                        };

            // step 1
            using (var document = new Document())
            {
                // step 2
                PdfWriter.GetInstance(document, stream);
                // step 3
                document.AddAuthor(TestUtils.Author);
                document.Open();
                // step 4
                var objects = HtmlWorker.ParseToList(
                                                     new StringReader(@"<b>This is a test</b>
                     <br/>
                     <span style='color:blue;font-size:20pt;font-family:tahoma;font-style:italic;font-weight:bold'>
                        اين يك آزمايش است.
                    </span>"),
                                                     styles,
                                                     props
                                                    );
                foreach (var element in objects)
                {
                    document.Add(element);
                }
            }
        }

        TestUtils.VerifyPdfFileIsReadable(pdfFilePath);
    }

    [TestMethod]
    public void Verify_Html_To_Pdf_With_colspan_CanBeCreated()
    {
        var pdfFilePath = TestUtils.GetOutputFileName();
        using (var stream = new FileStream(pdfFilePath, FileMode.Create))
        {
            // create a StyleSheet
            var styles = new StyleSheet();
            // set the default font's properties
            styles.LoadTagStyle(HtmlTags.BODY, "encoding", "Identity-H");
            styles.LoadTagStyle(HtmlTags.BODY, HtmlTags.FONT, "Tahoma");
            styles.LoadTagStyle(HtmlTags.BODY, "size", "16pt");

            FontFactory.Register(TestUtils.GetTahomaFontPath());

            var unicodeFontProvider = FontFactoryImp.Instance;
            unicodeFontProvider.DefaultEmbedding = BaseFont.EMBEDDED;
            unicodeFontProvider.DefaultEncoding = BaseFont.IDENTITY_H;

            var props = new NullValueDictionary<string, object>
                        {
                            { "font_factory", unicodeFontProvider },
                        };

            using (var document = new Document())
            {
                PdfWriter.GetInstance(document, stream);
                document.AddAuthor(TestUtils.Author);
                document.Open();
                var objects = HtmlWorker.ParseToList(
                                                     new
                                                         StringReader(@"<table style='width: 100%;font-size:9pt;font-family:Tahoma;'>
 <tr>
    <td align='center' bgcolor='#00FF00' colspan='2'>سلام!</td>
 </tr>
 <tr>
    <td align = 'right'> ماه </td>
    <td align = 'right'> Savings </td>
 </tr>
 <tr>
   <td align = 'right'> January </td>
   <td align = 'right'>$100 </td>
 </tr>
</table>
<br/>
<table style='width: 100%;font-size:9pt;font-family:Tahoma;'>
 <tr>
    <td align = 'right'> ماه </td>
    <td align = 'right'> پس‌انداز </td>
 </tr>
 <tr>
   <td align = 'right'> خرداد </td>
   <td align = 'right'>$100 </td>
 </tr>
</table>
"),
                                                     styles,
                                                     props
                                                    );
                foreach (var element in objects)
                {
                    applyRtlRunDirection(element);
                    document.Add(element);
                }
            }
        }

        TestUtils.VerifyPdfFileIsReadable(pdfFilePath);
    }

    private void applyRtlRunDirection(IElement htmlElement)
    {
        if (htmlElement is not PdfPTable table)
        {
            return;
        }

        table.RunDirection = PdfWriter.RUN_DIRECTION_RTL;
        foreach (var row in table.Rows)
        {
            foreach (var cell in row.GetCells())
            {
                if (cell == null)
                {
                    continue;
                }

                cell.RunDirection = PdfWriter.RUN_DIRECTION_RTL;
            }
        }
    }
}