// // This code is part of Document Solutions for PDF 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.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 // underline those occurrences using the text markup underline annotation. // This example is similar to FindAndUnderline, but here we create one text markup // annotation per page, adding all occurrences of the words to highlight to it, // rather than adding a separate annotation for each occurrence. public class MarkupPerPage { public int CreatePDF(Stream stream) { // Load the PDF: var doc = new GcPdfDocument(); using var fs = File.OpenRead(Path.Combine("Resources", "PDFs", "The-Rich-History-of-JavaScript.pdf")); doc.Load(fs); // Find all occurrences of "JavaScript" or "ECMAScript" using regex: var ft = new FindTextParams("JavaScript|ECMAScript", wholeWord: false, matchCase: false, regex: true); var found = doc.FindText(ft, null); // Add a text markup annotation per page (keys are page indices): Dictionary<int, Tuple<TextMarkupAnnotation, List<Quadrilateral>>> markups = new Dictionary<int, Tuple<TextMarkupAnnotation, List<Quadrilateral>>>(); foreach (var f in found) { if (!markups.TryGetValue(f.PageIndex, out var markup)) { markup = new Tuple<TextMarkupAnnotation, List<Quadrilateral>>( new TextMarkupAnnotation() { Page = doc.Pages[f.PageIndex], MarkupType = TextMarkupType.Highlight, Color = Color.Chartreuse }, new List<Quadrilateral>()); markups[f.PageIndex] = markup; } foreach (var b in f.Bounds) markup.Item2.Add(b); } foreach (var v in markups.Values) v.Item1.Area = v.Item2; // Done: doc.Save(stream); return doc.Pages.Count; } } }