// ===========================================================================
// ©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.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Diagnostics;
using System.Windows.Forms;
using WebSupergoo.ABCpdf14.Atoms;
namespace WebSupergoo.PDFSurgeon {
public partial class EditText : Form {
public EditText(MainForm parent, ObjectExtractor obj) {
InitializeComponent();
_parent = parent;
_editor = new StreamEditor(obj);
}
private void EditText_Load(object sender, EventArgs e) {
if (_editor.Stream != null && !_editor.Extractor.IsAscii) {
if (_editor.Stream.Compressed) {
const string message = "This object appears to contain compressed data rather than text.\r\n\r\nWould you like to decompress it prior to editing?";
var action = MessageBox.Show(message, "Warning", MessageBoxButtons.YesNoCancel);
if (action == DialogResult.Yes) {
if (!_editor.Stream.Decompress()) {
MessageBox.Show("Unable to decompress object.", "Warning", MessageBoxButtons.OK);
return;
}
}
else if (action == DialogResult.Cancel)
return;
}
else {
const string message = "This object appears to contain data rather than text.\r\n\r\nWould you like to ASCII 85 encode it for editing?";
var action = MessageBox.Show(message, "Warning", MessageBoxButtons.YesNoCancel);
if (action == DialogResult.Yes)
_editor.Stream.CompressAscii85();
else if (action == DialogResult.Cancel)
return;
}
}
Size size = Properties.Settings.Default.EditTextSize;
if (size.Width > 30 && size.Height > 30)
Size = size;
Point pos = Properties.Settings.Default.EditTextPosition;
if (pos.X != 0 && pos.Y != 0) {
pos = new Point(_parent.Location.X + pos.X, _parent.Location.Y + pos.Y);
var rect = Screen.GetBounds(pos);
rect.Inflate(-20, -20);
if (rect.Contains(pos))
Location = pos;
}
_editor.Load();
textBox1.Text = _editor.LiveText;
// Unusual characters may change when put in text box.
_editor.OriginalText = _editor.LiveText = textBox1.Text;
bool isLive = _editor.ContentStream != null;
liveUpdate.Enabled = isLive;
trackBar1.Enabled = isLive;
trackBar2.Enabled = isLive;
formatContent.Enabled = isLive;
openPdf.Enabled = isLive;
Text = $"EditText ID: {_editor.Extractor.Object.ID}";
}
private void EditText_FormClosing(object sender, FormClosingEventArgs e) {
Properties.Settings.Default.EditTextSize = Size;
Properties.Settings.Default.EditTextPosition = new Point(Location.X - _parent.Location.X, Location.Y - _parent.Location.Y);
Properties.Settings.Default.Save();
_parent._editTexts.Remove(_editor.Extractor);
}
private MainForm _parent;
private StreamEditor _editor;
private GraphicsScanner.Fixture _fixture;
private void textBox1_TextChanged(object sender, EventArgs e) {
if (liveUpdate.Checked) {
if (textBox1.Text != _editor.LiveText) {
_editor.CurrentText = textBox1.Text;
_parent.RefreshSelectedImage();
_editor.LiveText = textBox1.Text;
}
}
numericUpDown1.Enabled = false;
}
private void ok_Click(object sender, EventArgs e) {
if ((textBox1.Text != _editor.OriginalText) || (textBox1.Text != _editor.LiveText)) {
_editor.CurrentText = textBox1.Text;
_parent.UpdateContent(_editor.Extractor);
_parent.UpdateImage(_editor.Extractor, true);
_parent.Dirty = true;
}
Close();
}
private void cancel_Click(object sender, EventArgs e) {
if (textBox1.Text != _editor.OriginalText) {
liveUpdate.Checked = true;
textBox1.Text = _editor.OriginalText;
}
Close();
}
private void formatContent_Click(object sender, EventArgs e) {
try {
var s = _editor.FormatContentStream();
if (s == null)
return;
textBox1.Text = s;
}
catch (Exception ex) {
MessageBox.Show("Unable to format content stream. " + ex.Message);
}
}
private void openPdf_Click(object sender, EventArgs e) {
_parent.OpenSnapshot();
}
private void liveUpdate_CheckedChanged(object sender, EventArgs e) {
if (liveUpdate.Checked && _editor.ResourceOwner != null) {
_parent.SelectByObjectID(_editor.ResourceOwner.ID);
}
}
private void trackBar1_Scroll(object sender, EventArgs e) {
double lo = (double)trackBar1.Value / trackBar1.Maximum;
double hi = (double)trackBar2.Value / trackBar2.Maximum;
StringBuilder sb = _editor.GetPartialContentStream(lo, hi);
if (sb != null) {
textBox1.Text = UpdateFromContentStream(sb.ToString(), textBox1.Text);
UpdateSearch();
}
}
private void trackBar2_Scroll(object sender, EventArgs e) {
double lo = (double)trackBar1.Value / trackBar1.Maximum;
double hi = (double)trackBar2.Value / trackBar2.Maximum;
StringBuilder sb = _editor.GetPartialContentStream(lo, hi);
if (sb != null) {
textBox1.Text = UpdateFromContentStream(sb.ToString(), textBox1.Text);
UpdateSearch();
}
}
private void timer1_Tick(object sender, EventArgs e) {
var fixture = _parent.Fixture;
if (fixture != _fixture) {
if (fixture != null) {
string txt = textBox1.Text;
string keyword = "stream";
int start = txt.IndexOf(keyword);
start = start != -1 ? start + keyword.Length : -1;
start = (start != -1) && (txt.Length > start) && (txt[start] == '\r') ? start + 1 : start;
start = (start != -1) && (txt.Length > start) && (txt[start] == '\n') ? start + 1 : start;
if (start != -1) {
int offset = start + fixture.Offset;
int length = Math.Min(textBox1.Text.Length - offset, fixture.Length);
if (length > 0) {
textBox1.Select(offset, length);
textBox1.ScrollToCaret();
textBox1.Focus();
}
}
}
_fixture = fixture;
}
}
private void TextBox2_TextChanged(object sender, EventArgs e)
{
UpdateSearch();
}
private void NumericUpDown1_ValueChanged(object sender, EventArgs e)
{
UpdateSearch();
}
bool _update = true;
private void UpdateSearch()
{
string search = textBox2.Text;
string text = textBox1.Text;
numericUpDown1.Enabled = true;
bool isEmpty = string.IsNullOrEmpty(search);
List<int> positions = new List<int>();
if (!isEmpty)
{
int p1 = 0;
while (true)
{
int p2 = text.IndexOf(search, p1, StringComparison.OrdinalIgnoreCase);
if (p2 == -1)
break;
positions.Add(p2);
p1 = p2 + search.Length;
}
isEmpty = positions.Count == 0;
}
if (!isEmpty)
{
try
{
if (_update) {
_update = false;
numericUpDown1.Maximum = -1;
numericUpDown1.Minimum = -positions.Count;
textBox1.Select(positions[-((int)numericUpDown1.Value) - 1], search.Length);
textBox1.ScrollToCaret();
label3.Text = -(numericUpDown1.Value) + "/" + positions.Count.ToString();
}
}
finally
{
_update = true;
}
}
else {
numericUpDown1.Maximum = 0;
textBox1.Select(0, 0);
label3.Text = "0/0";
numericUpDown1.Enabled = false;
}
}
private static string UpdateFromContentStream(string newContentStream, string originalText) {
string header = originalText.Substring(0, originalText.IndexOf("stream\r\n"));
var dict = (DictAtom)Atom.FromString(header);
dict["Length"] = new NumAtom(newContentStream.Length);
return dict.ToString() + "\r\nstream\r\n" + newContentStream + "\r\nendstream\r\n";
}
}
}
