// ===========================================================================
// ©2013-2026 WebSupergoo. All rights reserved.
//
// This source code is for use exclusively with the ABCpdf product with
// which it is distributed, under the terms of the license for that
// product. Details can be found at
//
// http://www.websupergoo.com/
//
// This copyright notice must not be deleted and must be reproduced alongside
// any sections of code extracted from this module.
// ===========================================================================
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Windows.Forms;
using System.IO;
using System.Text;
using System.Linq;
using WebSupergoo.ABCpdf14;
using WebSupergoo.ABCpdf14.Objects;
using WebSupergoo.ABCpdf14.Atoms;
using WebSupergoo.ABCpdf14.Operations;
using WebSupergoo.ABCpdf14.Elements;
using WebSupergoo.ABCpdf14.Operations.Accessibility;
using WebSupergoo.TableDetection;
namespace AccessiblePDF {
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form {
private Button button1;
private Button button2;
private Button button3;
private Button button4;
private Button button5;
private Button button6;
private Button button7;
private TextBox textBox1;
private TextBox textBox3;
private TextBox textBox2;
private Button button8;
private Button button9;
private Button button10;
private Button button11;
private Button button12;
private Button button13;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
public Form1() {
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose(bool disposing) {
if (disposing) {
if (components != null) {
components.Dispose();
}
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent() {
System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Form1));
this.button1 = new System.Windows.Forms.Button();
this.button3 = new System.Windows.Forms.Button();
this.button4 = new System.Windows.Forms.Button();
this.button5 = new System.Windows.Forms.Button();
this.button6 = new System.Windows.Forms.Button();
this.button7 = new System.Windows.Forms.Button();
this.textBox1 = new System.Windows.Forms.TextBox();
this.textBox3 = new System.Windows.Forms.TextBox();
this.button2 = new System.Windows.Forms.Button();
this.textBox2 = new System.Windows.Forms.TextBox();
this.button8 = new System.Windows.Forms.Button();
this.button9 = new System.Windows.Forms.Button();
this.button10 = new System.Windows.Forms.Button();
this.button11 = new System.Windows.Forms.Button();
this.button12 = new System.Windows.Forms.Button();
this.button13 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(19, 358);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(256, 33);
this.button1.TabIndex = 0;
this.button1.Text = "Change Content";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button3
//
this.button3.Location = new System.Drawing.Point(301, 120);
this.button3.Name = "button3";
this.button3.Size = new System.Drawing.Size(256, 33);
this.button3.TabIndex = 2;
this.button3.Text = "Detect Tables";
this.button3.Click += new System.EventHandler(this.button3_Click);
//
// button4
//
this.button4.Location = new System.Drawing.Point(19, 120);
this.button4.Name = "button4";
this.button4.Size = new System.Drawing.Size(256, 33);
this.button4.TabIndex = 3;
this.button4.Text = "Detect Headers";
this.button4.Click += new System.EventHandler(this.button4_Click);
//
// button5
//
this.button5.Location = new System.Drawing.Point(301, 162);
this.button5.Name = "button5";
this.button5.Size = new System.Drawing.Size(256, 34);
this.button5.TabIndex = 4;
this.button5.Text = "Detect Lists";
this.button5.Click += new System.EventHandler(this.button5_Click);
//
// button6
//
this.button6.Location = new System.Drawing.Point(19, 162);
this.button6.Name = "button6";
this.button6.Size = new System.Drawing.Size(256, 34);
this.button6.TabIndex = 5;
this.button6.Text = "Detect Sections";
this.button6.Click += new System.EventHandler(this.button6_Click);
//
// button7
//
this.button7.Location = new System.Drawing.Point(584, 120);
this.button7.Name = "button7";
this.button7.Size = new System.Drawing.Size(256, 33);
this.button7.TabIndex = 6;
this.button7.Text = "Detect Artifacts";
this.button7.Click += new System.EventHandler(this.button7_Click);
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(17, 244);
this.textBox1.Multiline = true;
this.textBox1.Name = "textBox1";
this.textBox1.ReadOnly = true;
this.textBox1.Size = new System.Drawing.Size(823, 88);
this.textBox1.TabIndex = 7;
this.textBox1.Text = resources.GetString("textBox1.Text");
//
// textBox3
//
this.textBox3.Location = new System.Drawing.Point(19, 30);
this.textBox3.Multiline = true;
this.textBox3.Name = "textBox3";
this.textBox3.ReadOnly = true;
this.textBox3.Size = new System.Drawing.Size(821, 68);
this.textBox3.TabIndex = 9;
this.textBox3.Text = resources.GetString("textBox3.Text");
//
// button2
//
this.button2.Location = new System.Drawing.Point(19, 575);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(256, 33);
this.button2.TabIndex = 10;
this.button2.Text = "Extract Structure";
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// textBox2
//
this.textBox2.Location = new System.Drawing.Point(19, 481);
this.textBox2.Multiline = true;
this.textBox2.Name = "textBox2";
this.textBox2.ReadOnly = true;
this.textBox2.Size = new System.Drawing.Size(823, 67);
this.textBox2.TabIndex = 11;
this.textBox2.Text = resources.GetString("textBox2.Text");
//
// button8
//
this.button8.Location = new System.Drawing.Point(586, 575);
this.button8.Name = "button8";
this.button8.Size = new System.Drawing.Size(256, 33);
this.button8.TabIndex = 12;
this.button8.Text = "Markup Structure";
this.button8.Click += new System.EventHandler(this.button8_Click);
//
// button9
//
this.button9.Location = new System.Drawing.Point(584, 358);
this.button9.Name = "button9";
this.button9.Size = new System.Drawing.Size(256, 33);
this.button9.TabIndex = 13;
this.button9.Text = "Add Tagged Signature";
this.button9.Click += new System.EventHandler(this.button9_Click);
//
// button10
//
this.button10.Location = new System.Drawing.Point(584, 162);
this.button10.Name = "button10";
this.button10.Size = new System.Drawing.Size(256, 34);
this.button10.TabIndex = 14;
this.button10.Text = "Add Custom Tags";
this.button10.Click += new System.EventHandler(this.button10_Click);
//
// button11
//
this.button11.Location = new System.Drawing.Point(301, 358);
this.button11.Name = "button11";
this.button11.Size = new System.Drawing.Size(256, 33);
this.button11.TabIndex = 15;
this.button11.Text = "Remove Content";
this.button11.Click += new System.EventHandler(this.button11_Click);
//
// button12
//
this.button12.Location = new System.Drawing.Point(19, 404);
this.button12.Name = "button12";
this.button12.Size = new System.Drawing.Size(256, 33);
this.button12.TabIndex = 16;
this.button12.Text = "Add Tagged Content 1";
this.button12.Click += new System.EventHandler(this.button12_Click);
//
// button13
//
this.button13.Location = new System.Drawing.Point(301, 404);
this.button13.Name = "button13";
this.button13.Size = new System.Drawing.Size(256, 33);
this.button13.TabIndex = 17;
this.button13.Text = "Add Tagged Content 2";
this.button13.Click += new System.EventHandler(this.button13_Click);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(8, 19);
this.ClientSize = new System.Drawing.Size(881, 626);
this.Controls.Add(this.button13);
this.Controls.Add(this.button12);
this.Controls.Add(this.button11);
this.Controls.Add(this.button10);
this.Controls.Add(this.button9);
this.Controls.Add(this.button8);
this.Controls.Add(this.textBox2);
this.Controls.Add(this.button2);
this.Controls.Add(this.textBox3);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.button7);
this.Controls.Add(this.button6);
this.Controls.Add(this.button5);
this.Controls.Add(this.button4);
this.Controls.Add(this.button3);
this.Controls.Add(this.button1);
this.Name = "Form1";
this.Text = "AccessiblePDF";
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main() {
Application.Run(new Form1());
}
private void button1_Click(object sender, System.EventArgs e) {
string theBase = Directory.GetCurrentDirectory();
string theRez = Directory.GetParent(theBase).Parent.FullName + "\\";
ChangeContent(Path.Combine(theRez, "_Flowers.pdf"), Path.Combine(theRez, "_Squirrel.png"), Path.Combine(theRez, "6-replace_content.pdf"));
}
private static void ChangeContent(string src, string img, string dst) {
using (Doc doc = new Doc()) {
doc.Read(src);
Structure tags = new Structure(doc);
List<StructureElementElement> images = tags.FindElementsByType("CustomImageTag");
if (images.Count > 0) {
using (XImage image = XImage.FromFile(img, null)) {
PixMap pm = PixMap.FromXImage(doc.ObjectSoup, image);
tags.ReplaceImages(images, pm);
}
}
List<StructureElementElement> texts = tags.FindElementsByType("CustomTextTag");
tags.ReplaceText(texts, "Replaced Text!");
doc.Save(dst);
}
}
private void button11_Click(object sender, EventArgs e) {
string theBase = Directory.GetCurrentDirectory();
string theRez = Directory.GetParent(theBase).Parent.FullName + "\\";
AccessibilityWithTables(Path.Combine(theRez, "_Romans.pdf"), Path.Combine(theRez, "9-subject_matter.pdf"));
PurgeUnreferencedTags(Path.Combine(theRez, "9-subject_matter.pdf"), Path.Combine(theRez, "9-purge_tags_before.pdf"), Path.Combine(theRez, "9-purge_tags_after.pdf"));
File.Delete(Path.Combine(theRez, "9-subject_matter.pdf"));
}
private static void PurgeUnreferencedTags(string src, string before, string after) {
var r = new Random(5); // arbitrary seed set to ensure same output each time
using (Doc doc = new Doc()) {
doc.Read(src);
foreach (var page in doc.ObjectSoup.Catalog.Pages.GetPageArrayAll()) {
string txt = ASCIIEncoding.ASCII.GetString(page.GetContentData());
string[] lines = txt.Split(new string[] { "\r\n", "\r", "\n" }, StringSplitOptions.None);
var sb = new StringBuilder();
bool skipping = false;
foreach (string line in lines) {
if (line.Contains("/Span << /MCID") && (r.Next(5) == 0))
skipping = true;
else if (skipping && line.Contains("EMC"))
skipping = false;
else if (!skipping)
sb.AppendLine(line);
}
var l = page.GetLayers()[0];
l.SetData(Encoding.ASCII.GetBytes(sb.ToString()), true);
}
doc.Save(before);
Structure tags = new Structure(doc);
tags.Purge(new string[] { "P" });
tags.UpdateActualText(true, true);
doc.Save(after);
//MarkupStructure(before, before.Replace(".pdf", "_Markup.pdf"));
//MarkupStructure(after, after.Replace(".pdf", "_Markup.pdf"));
}
}
private void button2_Click(object sender, EventArgs e) {
string theBase = Directory.GetCurrentDirectory();
string theRez = Directory.GetParent(theBase).Parent.FullName + "\\";
foreach (string file in Directory.GetFiles(theRez, "*.pdf")) {
if (Path.GetFileName(file).StartsWith("_"))
continue;
// the content we extract isn't really HTML but it is similar enough that a browser will often display it
ExtractStructure(file, Path.Combine(theRez, Path.GetFileNameWithoutExtension(file) + ".htm"));
}
}
private static void ExtractStructure(string src, string dst) {
using (Doc doc = new Doc()) {
doc.Read(src);
Structure tags = new Structure(doc);
StringBuilder sb = tags.ExtractStructure();
File.WriteAllText(dst, sb.ToString());
}
}
private void button3_Click(object sender, EventArgs e) {
string theBase = Directory.GetCurrentDirectory();
string theRez = Directory.GetParent(theBase).Parent.FullName + "\\";
AccessibilityWithTables(Path.Combine(theRez, "_Romans.pdf"), Path.Combine(theRez, "3-detect_tables.pdf"));
}
private static void AccessibilityWithTables(string src, string dst) {
using (Doc doc = new Doc()) {
doc.Read(src);
AccessibilityOperation op = new AccessibilityOperation(doc);
op.PageContents.AddPages();
op.MakeAccessible();
doc.Save(dst);
Structure tags = new Structure(doc);
// reorder elements so that they go from top to bottom
StructureElementElement document = (StructureElementElement)tags.Root.EntryK[0];
KidArranger.SortTopToBottom(tags, document, null); // can pass KidArranger.GetPageLayout(doc.MediaBox, 72.0, 72.0, 2) for columns
// convert paragraphs to tables where appropriate
List<StructureElementElement> elements = tags.FindElementsByType("P");
Tables tables = new Tables();
tables.FontSensitive = false;
tables.Add(tags, elements);
foreach (Table table in tables.Items) {
if (table.Items.Count <= 1)
continue; // too small
int index = 0;
StructureElementElement parent = null;
StructureElementElement tb = new StructureElementElement(document);
tb.EntryType = "StructElem";
tb.EntryS = "Table";
foreach (Row row in table.Items) {
StructureElementElement tr = new StructureElementElement(document);
tr.EntryType = "StructElem";
tr.EntryS = "TR";
tr.SetParent(tb);
foreach (StructureElementElement item in row.Items) {
if ((parent == null) && (item != null)) {
Debug.Assert(item.EntryP is StructureTreeRootElement == false);
parent = item.EntryP as StructureElementElement;
index = parent.EntryK.IndexOf(item);
}
StructureElementElement td = new StructureElementElement(document);
td.EntryType = "StructElem";
td.EntryS = "TD";
td.SetParent(tr);
if (item != null)
item.SetParent(td);
}
}
tb.SetParent(parent, index);
}
doc.Save(dst);
}
}
private void button4_Click(object sender, EventArgs e) {
string theBase = Directory.GetCurrentDirectory();
string theRez = Directory.GetParent(theBase).Parent.FullName + "\\";
AccessibilityWithHeaders(Path.Combine(theRez, "_Romans.pdf"), Path.Combine(theRez, "1-detect_headers.pdf"));
}
private static void AccessibilityWithHeaders(string src, string dst) {
using (Doc doc = new Doc()) {
doc.Read(src);
AccessibilityOperation op = new AccessibilityOperation(doc);
op.PageContents.AddPages();
op.MakeAccessible();
doc.Save(dst);
Structure tags = new Structure(doc);
// reorder elements so that they go from top to bottom
StructureElementElement document = (StructureElementElement)tags.Root.EntryK[0];
KidArranger.SortTopToBottom(tags, document, null);
// determine what styles are used for headers and change tag type appropriately
List<StructureElementElement> elements = tags.FindElementsByType("P");
Dictionary<string, List<StructureElementElement>> styles = new Dictionary<string, List<StructureElementElement>>();
foreach (StructureElementElement element in elements) {
string weight = null;
if (!element.GetStyle().TryGetValue("font-weight", out weight))
continue; // we are only interested in bold fonts
int value = 0;
if ((!int.TryParse(weight, out value)) || (value < 700))
continue;
string size = null;
if (!element.GetStyle().TryGetValue("font-size", out size))
continue;
List<StructureElementElement> matches = null;
if (!styles.TryGetValue(size, out matches)) {
matches = new List<StructureElementElement>();
styles[size] = matches;
}
matches.Add(element);
}
List<Style> headers = new List<Style>();
foreach (KeyValuePair<string, List<StructureElementElement>> pair in styles)
headers.Add(new Style(pair.Key, pair.Value));
headers.Sort((i1, i2) => i1.Elements.Count.CompareTo(i2.Elements.Count));
for (int i = 0; i < headers.Count; i++) {
if (i > 4)
break; // limit the number of header levels
string tag = "H" + (i + 1).ToString();
foreach (StructureElementElement element in headers[i].Elements) {
element.EntryS = tag;
}
}
doc.Save(dst);
}
}
private void button5_Click(object sender, EventArgs e) {
string theBase = Directory.GetCurrentDirectory();
string theRez = Directory.GetParent(theBase).Parent.FullName + "\\";
AccessibilityWithLists(Path.Combine(theRez, "_Romans.pdf"), Path.Combine(theRez, "4-detect_lists.pdf"));
}
private static void AccessibilityWithLists(string src, string dst) {
using (Doc doc = new Doc()) {
doc.Read(src);
AccessibilityOperation op = new AccessibilityOperation(doc);
op.PageContents.AddPages();
op.MakeAccessible();
doc.Save(dst);
Structure tags = new Structure(doc);
// reorder elements so that they go from top to bottom
StructureElementElement document = (StructureElementElement)tags.Root.EntryK[0];
KidArranger.SortTopToBottom(tags, document, null);
// detect and insert list and list item structure
List<StructureElementElement> elements = tags.FindElementsByType("P");
StructureElementElement list = null;
foreach (StructureElementElement element in elements) {
bool isListItem = element.EntryActualText.TrimStart().StartsWith("\u2022");
if ((isListItem) && (list == null)) {
list = new StructureElementElement(document);
list.EntryType = "StructElem";
list.EntryS = "L";
Debug.Assert(element.EntryP is StructureTreeRootElement == false);
StructureElementElement parent = element.EntryP as StructureElementElement;
Debug.Assert(parent != null);
int index = parent.EntryK.IndexOf(element);
list.SetParent(parent, index);
}
if (isListItem) {
element.SetParent(list, int.MaxValue);
element.EntryS = "LI";
}
if ((!isListItem) && (list != null))
list = null;
}
doc.Save(dst);
}
}
private void button10_Click(object sender, EventArgs e) {
string theBase = Directory.GetCurrentDirectory();
string theRez = Directory.GetParent(theBase).Parent.FullName + "\\";
AccessibilityWithCustomTags(Path.Combine(theRez, "8-detect_custom_tags.pdf"));
}
private static void AccessibilityWithCustomTags(string dst) {
using (Doc doc = new Doc()) {
// add some content and some custom tags
if (true) {
doc.Rect.Inset(50, 50);
doc.Page = doc.AddPage();
Page page = (Page)doc.ObjectSoup[doc.Page];
page.AddLayer(new StreamObject(doc.ObjectSoup, Encoding.ASCII.GetBytes("BX\r\n")));
doc.AddTextStyled("<p tag-start=\"/H1 TAG\"><stylerun fontsize='72'><b>De Bello Gallico</b></stylerun></p>");
doc.AddTextStyled("<p tag-start=\"/H2 TAG\"><stylerun fontsize='36'>Julius Caesar</stylerun></p>");
doc.AddTextStyled("<p><stylerun fontsize='18'> </stylerun></p>");
doc.AddTextStyled("<p tag-start=\"/P TAG\"><stylerun fontsize='18'><b>Gallia</b> est omnis divisa in partes tres, quarum unam incolunt <b>Belgae</b>, aliam <b>Aquitani</b>, tertiam qui ipsorum lingua <b>Celtae</b>, nostra <b>Galli</b> appellantur.</stylerun></p>");
page.AddLayer(new StreamObject(doc.ObjectSoup, Encoding.ASCII.GetBytes("EX\r\n")));
}
// make accessible
AccessibilityOperation op = new AccessibilityOperation(doc);
op.PageContents.AddPages();
op.MakeAccessible();
// work out how our custom tags match up with the standard PDF tags
Dictionary<int, Dictionary<int, string>> allCustomTags = new Dictionary<int, Dictionary<int, string>>();
for (int i = 0; i < doc.PageCount; i++) {
// get page contents
doc.PageNumber = i + 1;
Dictionary<int, string> customTags = new Dictionary<int, string>();
allCustomTags[doc.Page] = customTags;
List<int> deletion = new List<int>();
Page page = (Page)doc.ObjectSoup[doc.Page];
ArrayAtom array = ArrayAtom.FromContentStream(page.GetContentData());
var items = OpAtom.Find(array, new string[] { "BDC", "TAG" });
string style = null;
// scan for tags
foreach (var pair in items) {
if (pair.Item1 == "BDC") {
NumAtom mcid = Atom.GetItem(array[pair.Item2 - 1], "MCID") as NumAtom;
if (mcid != null)
customTags[mcid.Num] = style;
}
else {
style = Atom.GetName(array[pair.Item2 - 1]);
deletion.Add(pair.Item2 - 1);
deletion.Add(pair.Item2);
}
}
// remove the custom tags we added
for (int j = deletion.Count - 1; j >= 0; j--)
array.RemoveAt(deletion[j]);
byte[] arrayData = array.GetData();
StreamObject so = new StreamObject(doc.ObjectSoup);
so.SetData(arrayData, 1, arrayData.Length - 2);
so.CompressFlate();
doc.SetInfo(page.ID, "/Contents:Del", "");
page.AddLayer(so);
}
// determine what custom styles are used and change tag type appropriately
Structure tags = new Structure(doc);
List<StructureElementElement> elements = tags.FindElementsByType("P");
foreach (StructureElementElement element in elements) {
var page = element.EntryPg;
if (page == null)
continue; // this should never happen
Dictionary<Page, HashSet<int>> mcidMap = new Dictionary<Page, HashSet<int>>();
element.FindMcids(mcidMap);
if (mcidMap.Count != 1)
continue; // paragraph spread across more than one page
HashSet<int> mcids = null;
mcidMap.TryGetValue(page.Object as Page, out mcids);
if (mcids == null)
continue;
// match mcids with custom tags
Dictionary<int, string> customTags = allCustomTags[page.Object.ID];
Dictionary<string, int> styles = new Dictionary<string, int>();
foreach (int mcid in mcids) {
string style = null;
customTags.TryGetValue(mcid, out style);
if (!string.IsNullOrWhiteSpace(style)) {
int count = 0;
styles.TryGetValue(style, out count);
styles[style] = count + 1;
}
}
// if verdict is unanimous assign new style
if (styles.Count == 1)
element.EntryS = (new List<string>(styles.Keys))[0];
}
doc.Save(dst);
}
}
private void button6_Click(object sender, EventArgs e) {
string theBase = Directory.GetCurrentDirectory();
string theRez = Directory.GetParent(theBase).Parent.FullName + "\\";
AccessibilityWithSections(Path.Combine(theRez, "_Romans.pdf"), Path.Combine(theRez, "2-detect_sections.pdf"));
}
private static void AccessibilityWithSections(string src, string dst) {
using (Doc doc = new Doc()) {
doc.Read(src);
AccessibilityOperation op = new AccessibilityOperation(doc);
op.PageContents.AddPages();
op.MakeAccessible();
doc.Save(dst);
Structure tags = new Structure(doc);
// reorder elements so that they go from top to bottom
StructureElementElement document = (StructureElementElement)tags.Root.EntryK[0];
KidArranger.SortTopToBottom(tags, document, null);
// define structure hierarchy template
List<Heading> template = new List<Heading>();
template.Add(new Heading("Title ", "Part", 1));
template.Add(new Heading("Subheader ", "Sect", 2));
// detect and insert section item structure
List<StructureElementElement> elements = tags.FindElementsByType("P");
Stack<StructureElementElement> hierarchy = new Stack<StructureElementElement>();
foreach (StructureElementElement element in elements) {
string text = element.EntryActualText.TrimStart();
foreach (Heading item in template) {
if (text.StartsWith(item.Match)) {
while (hierarchy.Count >= item.Level)
hierarchy.Pop();
if (hierarchy.Count == item.Level - 1) {
StructureElementElement heading = new StructureElementElement(document);
heading.EntryType = "StructElem";
heading.EntryS = item.Type;
StructureElementElement parent = (StructureElementElement)element.EntryP;
heading.SetParent(hierarchy.Count > 0 ? hierarchy.Peek() : parent, Int32.MaxValue);
hierarchy.Push(heading);
}
break;
}
}
if (hierarchy.Count > 0)
element.SetParent(hierarchy.Peek(), Int32.MaxValue);
}
doc.Save(dst);
}
}
private void button7_Click(object sender, EventArgs e) {
string theBase = Directory.GetCurrentDirectory();
string theRez = Directory.GetParent(theBase).Parent.FullName + "\\";
AccessibilityWithArtifacts(Path.Combine(theRez, "_Romans.pdf"), Path.Combine(theRez, "5-detect_artifacts.pdf"), false);
}
private static void AccessibilityWithArtifacts(string src, string dst, bool frame) {
using (Doc doc = new Doc()) {
doc.Read(src);
// define header and footer areas
Dictionary<int, XRect> headers = new Dictionary<int, XRect>();
Dictionary<int, XRect> footers = new Dictionary<int, XRect>();
for (int i = 0; i < doc.PageCount; i++) {
doc.PageNumber = i + 1;
XRect header = doc.CropBox.Clone();
header.Pin = XRect.Corner.TopLeft;
header.Height = 2.0 * 72;
headers[doc.Page] = header;
XRect footer = doc.CropBox.Clone();
footer.Pin = XRect.Corner.BottomLeft;
footer.Height = 2.0 * 72;
footers[doc.Page] = footer;
if (frame) { // mark red so we can see where they are
doc.Color.SetRgb(255, 0, 0, 40);
doc.Rect.String = header.ToString();
doc.FillRect();
doc.Rect.String = footer.ToString();
doc.FillRect();
}
}
// make accessible
AccessibilityOperation op = new AccessibilityOperation(doc);
op.PageContents.AddPages();
op.MakeAccessible();
doc.Save(dst);
Structure tags = new Structure(doc);
// reorder elements so that they go from top to bottom
StructureElementElement document = (StructureElementElement)tags.Root.EntryK[0];
KidArranger.SortTopToBottom(tags, document, null);
Dictionary<Page, HashSet<int>> artifacts = new Dictionary<Page, HashSet<int>>();
// find header elements and remove from structure
List<StructureElementElement> elements = tags.FindElementsByType("P");
foreach (StructureElementElement element in elements) {
var page = element.EntryPg;
if ((page != null) && (headers[page.Object.ID].Contains(element.GetBBox())) || (footers[page.Object.ID].Contains(element.GetBBox()))) {
Debug.Assert(element.Object is StreamObject == false, "This should never happen using ABCpdf. We should only ever see Pages.");
element.FindMcids(artifacts);
element.SetParent(null, int.MaxValue);
}
}
// turn header elements into artifacts
foreach (KeyValuePair<Page, HashSet<int>> pair in artifacts) {
Page page = pair.Key;
page.Flatten(true, false);
HashSet<int> mcids = pair.Value;
foreach (StreamObject layer in page.GetLayers()) {
if (!layer.Decompress())
throw new Exception("Unable to decompress stream.");
bool changed = false;
ArrayAtom array = ArrayAtom.FromContentStream(layer.GetData());
// eg "/Span << /MCID 11 >> BDC" becomes "/Artifact << /Type /Pagination /Subtype /Header>> BDC"
var items = OpAtom.Find(array, new string[] { "BDC" });
foreach (var pair2 in items) {
Atom[] args = OpAtom.GetParameters(array, pair2.Item2);
DictAtom pars = (DictAtom)args[1];
NumAtom mcid = (NumAtom)pars["MCID"];
if ((mcid != null) && (mcids.Contains(mcid.Num))) {
NameAtom name = (NameAtom)args[0];
name.Text = "Artifact";
pars.Clear();
pars["Type"] = new NameAtom("Pagination");
pars["Subtype"] = new NameAtom("Header");
changed = true;
}
}
if (changed) {
byte[] arrayData = array.GetData();
layer.SetData(arrayData, 1, arrayData.Length - 2);
}
layer.CompressFlate();
}
}
doc.Save(dst);
}
}
private void button8_Click(object sender, EventArgs e) {
string theBase = Directory.GetCurrentDirectory();
string theRez = Directory.GetParent(theBase).Parent.FullName + "\\";
foreach (string file in Directory.GetFiles(theRez, "*.pdf")) {
if (Path.GetFileName(file).StartsWith("_"))
continue;
MarkupStructure(file, Path.Combine(theRez, "_" + Path.GetFileNameWithoutExtension(file) + "_Markup.pdf"));
}
}
private static void MarkupStructure(string src, string dst) {
using (Doc doc = new Doc()) {
doc.Read(src);
Structure tags = new Structure(doc);
tags.MarkupStructure();
doc.Save(dst);
}
}
private void button9_Click(object sender, EventArgs e) {
string theBase = Directory.GetCurrentDirectory();
string theRez = Directory.GetParent(theBase).Parent.FullName + "\\";
AddTaggedSignature(Path.Combine(theRez, "_Flowers.pdf"), Path.Combine(theRez, "7-tagged-signature.pdf"));
}
private static void AddTaggedSignature(string src, string dst) {
using (Doc doc = new Doc()) {
doc.Read(src);
// find place in structure
Structure tags = new Structure(doc);
List<StructureElementElement> elements = tags.FindElementsByType("Span");
Debug.Assert(elements.Count == 1);
StructureElementElement signatureTag = elements[0];
doc.Page = signatureTag.GetPage(tags).ID;
// create signature and add to page
// we use a restricted set of options because it seems that eSignLive may not
// always understand all possible options 9th April 2018
CatalogElement catalog = new CatalogElement(doc.ObjectSoup.Catalog);
PageObjectElement page = new PageObjectElement(doc.ObjectSoup[doc.Page]);
int id = doc.AddObject("<</FT /Sig /Subtype /Widget /Type /Annot >>");
AnnotationElement sigAnnot = new AnnotationElement(doc.ObjectSoup[id]);
sigAnnot.EntryP = page;
XRect sigRect = XRect.FromLbwh(150, 600, 300, 100);
sigAnnot.EntryRect = new RectangleElement(ArrayAtom.FromXRect(sigRect), sigAnnot.Host);
SignatureFieldElement sigField = new SignatureFieldElement(doc.ObjectSoup[id]);
sigField.EntryT = "Signature1"; // name of signature field
sigField.EntryTU = "My Signature"; // display name of signature field
if (page.EntryAnnots == null)
page.EntryAnnots = new ArrayElement<AnnotationElement>(page);
page.EntryAnnots.Add(sigAnnot);
if (catalog.EntryAcroForm == null)
catalog.EntryAcroForm = new InteractiveFormElement(catalog);
if (catalog.EntryAcroForm.EntryFields == null)
catalog.EntryAcroForm.EntryFields = new ArrayElement<FieldElement>(catalog);
catalog.EntryAcroForm.EntrySigFlags = 1;
catalog.EntryAcroForm.EntryFields.Add(sigField);
// link into accessibility structure
StructureElementElement form = new StructureElementElement(page);
form.EntryType = "StructElem";
form.EntryT = "";
form.EntryS = "Form";
form.EntryP = signatureTag;
form.EntryK = new ArrayElement<Element>(form);
signatureTag.EntryK.Add(form);
ObjectReferenceElement objr = new ObjectReferenceElement(page);
objr.EntryType = "OBJR";
objr.EntryObj = sigAnnot;
objr.EntryPg = page;
form.EntryK.Add(objr);
tags.ParentTree.AddStructParent(sigAnnot.Object, form.Object);
doc.Save(dst);
}
}
private void button12_Click(object sender, EventArgs e) {
string theBase = Directory.GetCurrentDirectory();
string theRez = Directory.GetParent(theBase).Parent.FullName + "\\";
AddTaggedContent1(Path.Combine(theRez, "A-add-tagged-content.pdf"));
}
private static void AddTaggedContent1(string dst) {
using (var doc = new Doc()) {
doc.Font = doc.EmbedFont("Arial");
doc.TextStyle.Size = 20;
doc.Rect.Inset(50, 50);
var sb = new StringBuilder();
sb.AppendLine("<ul>");
foreach (var color in Enum.GetNames(typeof(System.Drawing.KnownColor)))
sb.AppendLine($"<li>{color}</li>");
sb.AppendLine("</ul>");
doc.TextStyle.AutoTag = true;
doc.Tag.Open("P"); // put our content inside a paragraph
int id = doc.AddTextStyled(sb.ToString());
doc.FrameRect();
while (true) {
var tl = (TextLayer)doc.ObjectSoup[id];
if (!tl.Truncated)
break;
doc.Page = doc.AddPage();
id = doc.AddTextStyled("", id);
doc.FrameRect();
}
doc.Tag.Close("P");
doc.Save(dst);
}
}
private void button13_Click(object sender, EventArgs e) {
string theBase = Directory.GetCurrentDirectory();
string theRez = Directory.GetParent(theBase).Parent.FullName + "\\";
AddTaggedContent2(Path.Combine(theRez, "_Flowers.pdf"), Path.Combine(theRez, "B-add-tagged-content.pdf"));
}
private static void AddTaggedContent2(string src, string dst) {
using (var doc = new Doc()) {
bool doRead = true, addToExistingPage = true, addToNewPage = true, addStampToExistingPage = true;
if (doRead)
doc.Read(src);
Structure structure = new Structure(doc);
structure.CreateAsRequired();
if (string.IsNullOrEmpty(structure.Title))
structure.Title = "Tagged Document"; // PDF/UA requires a title
if (structure.Root.EntryK == null || structure.Root.EntryK.Count == 0) {
var d = structure.Root.AddKid("Document");
d.EntryLang = "en-US";
addToExistingPage = false;
}
doc.Font = doc.EmbedFont("Arial", LanguageType.Unicode, false, true, false);
doc.TextStyle.Size = 24;
if (addToExistingPage) {
doc.Rect.SetRect(0, 0, doc.MediaBox.Width, 150);
doc.TextStyle.HPos = 0.5;
doc.Tag.Open("P", "Span");
doc.AddText("Some new additional content for the page.\r\n");
doc.Tag.CloseOpen("Span");
doc.AddText("Continued here as we have more content.");
doc.Tag.Close("Span", "P");
}
if (addToNewPage) {
doc.Page = doc.AddPage();
doc.Rect.String = doc.MediaBox.String;
doc.Rect.Inset(72, 72);
doc.TextStyle.HPos = 0;
doc.Tag.Open("Sect", "Div", "P");
doc.AddText("Div one paragraph one.\r\n");
doc.Tag.CloseOpen("P");
doc.AddText("Div one paragraph two.\r\n");
doc.Tag.Close("P", "Div");
doc.Tag.Open("Div", "P");
doc.AddText("Div two paragraph one.\r\n");
doc.Tag.CloseOpen("P");
doc.AddText("Div two paragraph two.\r\n");
doc.Tag.Close("P", "Div", "Sect");
}
if (addStampToExistingPage) {
doc.TextStyle.HPos = 0;
if (doc.Page == 0)
doc.Page = doc.AddPage();
doc.Tag.Roles["RubberStamp"] = "Annot";
doc.Tag.Classes["RedBorder"] = Atom.FromString("<< /O /Layout /BorderColor [1 0 0] /BorderStyle /Solid >>");
var graphic = doc.Tag.MakeTag("RubberStamp");
graphic.Attributes = new DictAtom();
graphic.Attributes["Alt"] = new StringAtom("Classification: Secret");
graphic.Attributes["C"] = new NameAtom("RedBorder");
graphic.Object = new StampAnnotation(doc, XRect.FromLbwh(200, 400, 100, 40), "SECRET", XColor.FromRgb(255, 0, 0));
doc.Tag.OpenClose(graphic);
}
doc.Save(dst);
}
}
}
class Heading {
public string Match;
public string Type;
public int Level;
public Heading(string match, string type, int level) { Match = match; Type = type; Level = level; }
}
class Style {
public string Size;
public List<StructureElementElement> Elements;
public Style(string size, List<StructureElementElement> elements) { Size = size; Elements = elements; }
};
}
