//
// This code is part of Document Solutions for Word demos.
// Copyright (c) MESCIUS inc. All rights reserved.
//
using System;
using System.Globalization;
using GrapeCity.Documents.Word;
using GrapeCity.Documents.Word.Fields;

namespace DsWordWeb.Demos
{
    // This sample shows how to use the STYLEREF field options to build a
    // "running reference" that always displays the text of the nearest
    // preceding paragraph formatted with a given style (e.g. the current
    // chapter or section heading), similar to a running head in a printed
    // book.
    //
    // LIMITATION: in DsWord 9.2.0 STYLEREF fields placed in a page header
    // or footer are not resolved when exporting to PDF/image.
    public class StyleRefFieldOpts
    {
        public GcWordDocument CreateDocx()
        {
            var doc = new GcWordDocument();

            var h1 = doc.Styles[BuiltInStyleId.Heading1];
            var h2 = doc.Styles[BuiltInStyleId.Heading2];

            // A few chapters, each with a couple of subsections spread across
            // multiple pages via filler text:
            var rnd = Util.NewRandom();
            for (int c = 1; c <= 3; c++)
            {
                doc.Body.AddParagraph($"Chapter {c}", h1);
                for (int s = 1; s <= 2; s++)
                {
                    doc.Body.AddParagraph($"Chapter {c}, Section {s}", h2);
                    for (int i = 0; i < rnd.Next(4, 6); i++)
                    {
                        doc.Body.AddParagraph(Util.LoremIpsumPar());
                    }

                    // A "breadcrumb" callout in the middle of the body text:
                    // both fields always resolve to the nearest preceding
                    // Heading1/Heading2 paragraph, so this line stays correct
                    // even if content is inserted or reordered above it.
                    var crumb = doc.Body.AddParagraph();
                    crumb.GetRange().Runs.Add("You are reading: ");
                    crumb.AddComplexField(new StyleRefFieldOptions(doc, h1.Name));
                    crumb.GetRange().Runs.Add(" → ");
                    crumb.AddComplexField(new StyleRefFieldOptions(doc, h2.Name));
                }
            }

            // 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;
        }
    }
}