//// 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.Text;using GCTEXT = GrapeCity.Documents.Text;using GCDRAW = GrapeCity.Documents.Drawing;
namespace DsPdfWeb.Demos.Basics{    // Ligatures (joining two or more letters into a single glyph) are supported by DsPdf,    // provided the selected font supports them, and the corresponding font feature is on.    // For the complete list of font features see featurelist.htm.    // See also FontFeatures.    public class Ligatures    {        public int CreatePDF(Stream stream)        {            // The list of common Latin ligatures:            const string latinLigatures = "fi, fj, fl, ff, ffi, ffl.";            // Set up ligature-related font features:            // All ON:            FontFeature[] allOn = new FontFeature[]            {                new FontFeature(FeatureTag.clig, true), // Contextual Ligatures                new FontFeature(FeatureTag.dlig, true), // Discretionary Ligatures                new FontFeature(FeatureTag.hlig, true), // Historical Ligatures                new FontFeature(FeatureTag.liga, true), // Standard Ligatures                new FontFeature(FeatureTag.rlig, true), // Required Ligatures            };            // All OFF:            FontFeature[] allOff = new FontFeature[]            {                new FontFeature(FeatureTag.clig, false),                new FontFeature(FeatureTag.dlig, false),                new FontFeature(FeatureTag.hlig, false),                new FontFeature(FeatureTag.liga, false),                new FontFeature(FeatureTag.rlig, false),            };            var doc = new GcPdfDocument();            var g = doc.NewPage().Graphics;            // Text insertion point:            var ip = new PointF(72, 72);            var tf = new TextFormat();            tf.Font = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "NotoSerif-Regular.ttf"));            tf.FontSize = 20;            g.DrawString($"Common Latin ligatures, font {tf.Font.FontFamilyName}", tf, ip);            ip.Y += 36;            // Turn all ligature features OFF:            tf.FontFeatures = allOff;            g.DrawString($"All ligature features OFF: {latinLigatures}", tf, ip);            ip.Y += 36;            // Turn all ligature features ON:            tf.FontFeatures = allOn;            g.DrawString($"All ligature features ON: {latinLigatures}", tf, ip);            ip.Y += 72;            // Repeat with a different font:            tf.Font = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "FoglihtenNo07.otf"));            g.DrawString($"Common Latin ligatures, font {tf.Font.FontFamilyName}", tf, ip);            ip.Y += 36;            // Turn all ligature features OFF:            tf.FontFeatures = allOff;            g.DrawString($"All ligature features OFF: {latinLigatures}", tf, ip);            ip.Y += 36;            // Turn all ligature features ON:            tf.FontFeatures = allOn;            g.DrawString($"All ligature features ON: {latinLigatures}", tf, ip);            // Done:            doc.Save(stream);            return doc.Pages.Count;        }    }}