//// This code is part of Document Solutions for PDF .NET demos.// Copyright (c) MESCIUS inc. All rights reserved.//using System;using System.IO;using System.Drawing;using GrapeCity.Documents.Pdf;using GrapeCity.Documents.Text;using GrapeCity.Documents.Pdf.AI;using DsPdfWeb.Demos.Common;
namespace DsPdfWeb.Demos{    // This sample generates a PDF with random content and uses the PDF AI Assistant (DsPdfAI)    // to analyze the document content and generate an outline tree (bookmarks) based on inferred headings,    // which is then added to the PDF.    //    // See PaginatedText for an example of using TextLayout for generating a multi-page PDF document.    //    // To run this sample locally, set your OpenAI credentials    // using Util.OpenAIToken.
    public class AiLoremOutlines    {        public int CreatePDF(Stream stream)        {            var doc = GeneratePDF();            try            {                // Use the PDF AI Assistant to analyze the document content and generate outlines:                var a = new OpenAIDocumentAssistant(Util.OpenAIToken);                var task = a.BuildOutlines(doc);                task.Wait();                // Set the page mode so that a viewer shows the outlines (bookmarks) on PDF open:                doc.PageMode = PageMode.UseOutlines;            }            catch (Exception ex)            {                // Make sure you have assigned your OpenAI API key to Util.OpenAIToken:                Util.CreatePdfError(doc, ex.Message);            }            doc.Save(stream);            return doc.Pages.Count;        }
        // Generate a PDF with random hierarchical content and return it:        GcPdfDocument GeneratePDF()        {            var doc = new GcPdfDocument();            var rnd = Util.NewRandom();            var tl = new TextLayout(72)            {                MaxWidth = doc.PageSize.Width,                MaxHeight = doc.PageSize.Height,                MarginAll = 72,                FirstLineIndent = 36,            };            tl.DefaultFormat.Font = StandardFonts.Times;            tl.DefaultFormat.FontSize = 12;            var fmtChapter = new TextFormat(tl.DefaultFormat) { FontSize = 18, FontBold = true };            var fmtSection = new TextFormat(tl.DefaultFormat) { FontSize = 16, FontBold = true };            var fmtSubSection = new TextFormat(tl.DefaultFormat) { FontSize = 14, FontBold = true };            var fmtNormal = new TextFormat(tl.DefaultFormat) { FontSize = 12 };            for (int i = 0; i < rnd.Next(2, 5); i++)            {                tl.Append($"Chapter {i + 1}: {Util.LoremIpsum(1, 1, 1, 1, 4).TrimEnd()}", fmtChapter);                tl.AppendParagraphBreak(fmtChapter);                for (int j = 0; j < rnd.Next(2, 4); j++)                {                    tl.Append($"Section {i + 1}.{j + 1}: {Util.LoremIpsum(1, 1, 1, 1, 4).TrimEnd()}", fmtSection);                    tl.AppendParagraphBreak(fmtSection);                    for (int k = 0; k < rnd.Next(2, 3); k++)                    {                        tl.Append($"Sub-section {i + 1}.{j + 1}.{k + 1}: {Util.LoremIpsum(1, 1, 1, 1, 4).TrimEnd()}", fmtSubSection);                        tl.AppendParagraphBreak(fmtSubSection);                        tl.AppendLine(Util.LoremIpsum(1), fmtNormal);                    }                }            }            // Split and render TextLayout as shown in the PaginatedText sample:            var tso = new TextSplitOptions(tl)            {                MinLinesInFirstParagraph = 2,                MinLinesInLastParagraph = 2,            };            tl.PerformLayout(true);            var tls = new TextLayoutSplitter(tl);            for (var tlPage = tls.Split(tso); tlPage != null; tlPage = tls.Split(tso))                doc.NewPage().Graphics.DrawTextLayout(tlPage, PointF.Empty);            return doc;        }    }}