//// 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 System.Text.RegularExpressions;using GrapeCity.Documents.Pdf;using GrapeCity.Documents.Text;using GCTEXT = GrapeCity.Documents.Text;using GCDRAW = GrapeCity.Documents.Drawing;
namespace DsPdfWeb.Demos.Basics{    // This sample shows how to render subscript and superscript text.    public class SubSuperScript    {        public int CreatePDF(Stream stream)        {            var doc = new GcPdfDocument();            var page = doc.NewPage();            var g = page.Graphics;
            var rc = Common.Util.AddNote(                "Demo of the TextFormat.Subscript and TextFormat.Superscript properties. " +                "We draw a random 'lorem ipsum' paragraph, rendering all instances of 'lorem' as subscript, " +                "and all instances of 'ipsum' as superscript.",                page);
            // Get a random 'lorem ipsum' paragraph:            var para = Common.Util.LoremIpsum(1, 18, 20, 20, 20);
            // Split the paragraph into 'lorem', 'ipsum' and everything else:            const string sub = "lorem";            const string super = "ipsum";            var frags = Regex.Split(para, $"({sub})|({super})");
            var font = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "NotoSerif-Regular.ttf"));
            // Create text formats for subscript and superscript:            var tfSub = new TextFormat() { Font = font, FontSize = 12, Subscript = true };            var tfSuper = new TextFormat(tfSub) { Subscript = false, Superscript = true };
            // Add text to a TextLayout using special formats for 'lorem' and 'ipsum':            var tl = g.CreateTextLayout();            tl.DefaultFormat.Font = font;            tl.DefaultFormat.FontSize = 12;            foreach (var frag in frags)            {                if (frag == sub)                    tl.Append(frag, tfSub);                else if (frag == super)                    tl.Append(frag, tfSuper);                else                    tl.Append(frag);            }
            // Set layout properties and render the text:            tl.MaxWidth = page.Size.Width;            tl.MaxHeight = page.Size.Height - rc.Height;            tl.MarginAll = 72;            tl.MarginTop = rc.Bottom + 36;            tl.PerformLayout(true);            g.DrawTextLayout(tl, PointF.Empty);
            // Done:            doc.Save(stream);            return doc.Pages.Count;        }    }}