//// This code is part of Document Solutions for Word demos.// Copyright (c) MESCIUS inc. All rights reserved.//using System.Drawing;using System.Globalization;using GrapeCity.Documents.Word;using GrapeCity.Documents.Word.Fields;
namespace DsWordWeb.Demos{    // This sample shows how to use the SEQ field options to enumerate arbitrary    // items in a DOCX Word document: numbered chapters, paragraphs numbered    // continuously across the whole document, and figures numbered independently    // within each chapter.    public class SeqFieldOpts    {        public GcWordDocument CreateDocx()        {            var doc = new GcWordDocument();
            // Three independent SEQ counters are used together in this sample:            // "Chapter" numbers the chapters themselves, "paragraphs" numbers every            // paragraph across the whole document (it is never reset), and "Figure"            // numbers the figures within the current chapter only (it is reset at            // the start of each chapter, see below).            var paragraphSeqOpts = new SeqFieldOptions(doc, "paragraphs") { NumberFormat = "'Paragraph '0':'" };            Color[] figureColors = { Color.SteelBlue, Color.IndianRed, Color.MediumSeaGreen, Color.Goldenrod };            int colorIdx = 0;            var rnd = Util.NewRandom();
            for (int c = 1; c <= 2; c++)            {                // The chapter heading carries a hidden SEQ field: figure captions                // later in this chapter look this value up by identifier (see below):                doc.Body.AddParagraph($"Chapter {c}", doc.Styles[BuiltInStyleId.Heading1])                    .AddComplexField(new SeqFieldOptions(doc, "Chapter") { Hidden = true });
                // A couple of numbered paragraphs, continuing the running count                // from the previous chapter:                for (int i = 0; i < rnd.Next(2, 4); i++)                {                    doc.Body.AddParagraph(doc.Styles[BuiltInStyleId.Heading2]).AddComplexField(paragraphSeqOpts);                    doc.Body.AddParagraph(Util.LoremIpsumPar());                }
                // A couple of figures, each a small placeholder graphic (a filled                // rectangle stands in for a real picture) followed by its caption.                for (int fig = 1; fig <= 2; fig++)                {                    doc.Body.Paragraphs.Add("");                    var shape = doc.Body.Runs.Last.GetRange().Shapes.Add(120, 80, GeometryType.Rectangle);                    shape.Fill.Type = FillType.Solid;                    shape.Fill.SolidFill.RGB = figureColors[colorIdx++ % figureColors.Length];
                    // The NumberFormat picture below uses a `numbered-item` reference                    // (backtick-delimited SEQ identifier, per ECMA-376 17.16.4.2): it                    // looks backward for the nearest SEQ field with that identifier                    // and inlines its number, so a single SEQ field combines the                    // chapter number with its own running count to produce                    // chapter-scoped captions: "Fig. 11", "Fig. 12" in chapter 1,                    // then "Fig. 21", "Fig. 22" in chapter 2 -- without needing a                    // separate REF field or a STYLEREF-based chapter lookup.                    // Note: a literal separator character placed directly between                    // the `identifier` reference and the following digit placeholder                    // (e.g. a hyphen for "Fig. 1-1") currently renders as a single                    // space instead of that literal character; placing the digit                    // placeholder immediately next to the `identifier` (with no                    // characters in between) avoids the issue.                    doc.Body.AddParagraph().AddComplexField(new SeqFieldOptions(doc, "Figure") { NumberFormat = "'Fig. '`Chapter`0" })                        .GetRange().Runs.Add(": a placeholder graphic.");                }                // Reset the figure counter before the next chapter:                doc.Body.AddParagraph().AddComplexField(new SeqFieldOptions(doc, "Figure") { Behavior = SeqFieldBehavior.ResetTo, ResetTo = 0, Hidden = true });            }
            // For reference add a simple page header with page number to the document:            var phdr = doc.Body.Sections.First.Headers[HeaderFooterType.Primary].Body.AddParagraph(doc.Styles[BuiltInStyleId.Closing]);            phdr.AddComplexField(new PageFieldOptions(doc) { NumberFormat = "'Page '0" });
            // Update fields using a specific culture:            doc.UpdateFields(new GrapeCity.Documents.Word.Layout.WordLayoutSettings() { FontCollection = Util.FontCollection, Culture = CultureInfo.GetCultureInfo("en-US") });
            // Done:            return doc;        }    }}