//// 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.Pdf.Annotations;using System.Collections.Generic;using GrapeCity.Documents.Common;
namespace DsPdfWeb.Demos{    // This example shows how to find all occurrences of two words in a PDF document and    // highlight each of those words with different color using text markup highlight annotations.    // Points of interest in this code:    // - We use separate FindText() calls for each word. To speed up the searches,    //   for each page we cache the text map and reuse it in the two FindText() calls.    //   While the performance improvement is minor in the case of two words, it would    //   be significant if the task were to find multiple words (e.g. when building a word index,    //   as illustrated in the WordIndex example which uses a similar approach.    // - In order to highlight each of the two words using a different color,    //   on each page we create one highlight markup annotation per word.    public class MarkupPerWord    {        public int CreatePDF(Stream stream)        {            const string word0 = "JavaScript";            const string word1 = "framework";
            // Load the PDF:            var doc = new GcPdfDocument();            using var fs = File.OpenRead(Path.Combine("Resources", "PDFs", "CompleteJavaScriptBook.pdf"));            doc.Load(fs);
            // A FindTextParams for each of the search words:            var ft0 = new FindTextParams(word0, wholeWord: false, matchCase: false, regex: false);            var ft1 = new FindTextParams(word1, wholeWord: false, matchCase: false, regex: false);
            // Find and highlight words on the pages, caching and reusing the text map            // of each page for the two searches:            foreach (var p in doc.Pages)            {                // Find and highlight the first word:                var textMap = p.GetTextMap();                TextMarkupAnnotation markup0 = null;                List<Quadrilateral> area0 = null;                textMap.FindText(ft0, fp_ => {                    markup0 ??= new TextMarkupAnnotation()                    {                        Subject = word0,                        Page = doc.Pages[fp_.PageIndex],                        MarkupType = TextMarkupType.Highlight,                        Color = Color.Cyan                    };                    area0 ??= new List<Quadrilateral>();                    foreach (var b in fp_.Bounds)                        area0.Add(b);                });                if (markup0 != null)                    markup0.Area = area0;
                // Find and highlight the second word:                TextMarkupAnnotation markup1 = null;                List<Quadrilateral> area1 = null;                textMap.FindText(ft1, fp_ => {                    markup1 ??= new TextMarkupAnnotation()                    {                        Subject = word1,                        Page = doc.Pages[fp_.PageIndex],                        MarkupType = TextMarkupType.Highlight,                        Color = Color.Fuchsia                    };                    area1 ??= new List<Quadrilateral>();                    foreach (var b in fp_.Bounds)                        area1.Add(b);                });                if (markup1 != null)                    markup1.Area = area1;            }
            // Done:            doc.Save(stream);            return doc.Pages.Count;        }    }}