//// 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 System.Collections.Immutable;using System.Linq;
namespace DsPdfWeb.Demos{    // This sample loads an existing PDF, enumerates the fonts used in it,    // determines whether each font is embedded, and prints the list of fonts    // along with their embedding status on the first page of the resulting PDF,    // followed by the original document.    //     // Note: The check for whether a font is embedded is reliable.    // However, determining whether an embedded font is a full font or a subset    // is heuristic and may not be accurate for all PDFs.    public class FontEmbeddingStatus    {        public int CreatePDF(Stream stream)        {            // This function checks whether a font is embedded, and if it is,            // also tries to determine whether it is a subset or a complete font.            // For embedded subsets, the name usually contains a prefix ending with '+'            // which we strip from the name for display (as does Acrobat).            (FontEmbedMode, string) GetFontInfo(GrapeCity.Documents.Pdf.Text.Font font)            {                if (font.IsEmbedded)                {                    int p = font.BaseFont.IndexOf('+');                    if (p > 0)                        return (FontEmbedMode.EmbedSubset, font.BaseFont[(p + 1)..]);                    else                        return (FontEmbedMode.EmbedFullFont, font.BaseFont);                }                return (FontEmbedMode.NotEmbed, font.BaseFont);            }            string EmbedModeToString(FontEmbedMode fem)            {                if (fem == FontEmbedMode.EmbedFullFont)                    return "Embedded font";                else if (fem == FontEmbedMode.EmbedSubset)                    return "Embedded subset";                else                    return "Not embedded";            }
            const string pdfName = "C1Olap-QuickStart.pdf";            var fs = File.OpenRead(Path.Combine("Resources", "PDFs", pdfName));            var doc = new GcPdfDocument();            doc.Load(fs);
            var page = doc.Pages.Insert(0);            var g = page.Graphics;            var tl = g.CreateTextLayout();            tl.AppendLine($"Fonts used in {pdfName}, and their embedding status:\n");            // List fonts and their embedding states:            var ff = doc.GetFonts().ToImmutableArray().Select(f_ => GetFontInfo(f_)).DistinctBy(fi_ => fi_.Item2).OrderBy(fi_ => fi_.Item2);            foreach (var fi in ff)                tl.AppendLine($"- \"{fi.Item2}\": {EmbedModeToString(fi.Item1)}");
            tl.MarginAll = g.Resolution;            g.DrawTextLayout(tl, Point.Empty);                        doc.Save(stream);            return doc.Pages.Count;        }    }}