//// This code is part of Document Solutions for PDF .NET demos.// Copyright (c) MESCIUS inc. All rights reserved.//using System.IO;using System.Drawing;using GrapeCity.Documents.Pdf;using GrapeCity.Documents.Pdf.Structure;using GrapeCity.Documents.Pdf.MarkedContent;
namespace DsPdfWeb.Demos.Basics{    // This sample shows how to create tagged (structured) PDF.    // To see/explore the tags, open the document in Adobe Acrobat Pro and go to    // View | Navigation Panels | Tags.    public class TagParagraphs    {        public int CreatePDF(Stream stream)        {            var doc = new GcPdfDocument();            var rnd = Common.Util.NewRandom();            int pageCount = rnd.Next(3, 7);
            // Create Part element, it will contain P (paragraph) elements            var sePart = new StructElement("Part");            doc.StructTreeRoot.Children.Add(sePart);
            // Add some pages, on each page add some paragraphs and tag them:            for (int pageIndex = 0; pageIndex < pageCount; ++pageIndex)            {                // Add page:                var page = doc.Pages.Add();                var g = page.Graphics;                const float margin = 36;                const float dy = 18;
                // Add some paragraphs:                int paraCount = rnd.Next(1, 5);                float y = margin;                for (int i = 0; i < paraCount; ++i)                {                    // Create paragraph element:                    var seParagraph = new StructElement("P") { DefaultPage = page };                    // Add it to Part element:                    sePart.Children.Add(seParagraph);
                    // Create paragraph:                    var tl = g.CreateTextLayout();                    tl.DefaultFormat.Font = StandardFonts.Helvetica;                    tl.DefaultFormat.FontSize = 12;                    tl.Append(Common.Util.LoremIpsum(1, 1, 5, 5, 10));                    tl.MaxWidth = page.Size.Width;                    tl.MarginLeft = tl.MarginRight = margin;                    tl.PerformLayout(true);
                    // Draw TextLayout within tagged content:                    g.BeginMarkedContent(new TagMcid("P", i));                    g.DrawTextLayout(tl, new PointF(0, y));                    g.EndMarkedContent();
                    y += tl.ContentHeight + dy;
                    // Add content item to paragraph StructElement:                    seParagraph.ContentItems.Add(new McidContentItemLink(i));                }            }
            // Mark document as tagged:            doc.MarkInfo.Marked = true;
            // Done:            doc.Save(stream);            return doc.Pages.Count;        }    }}