private void button4_Click(object sender, EventArgs e)
{
// Here we look at specific style - fonts - that we don't want.
// However the crucial difference between this and the other examples is
// that we purge the unused fonts to remove all references from the document.
using (Doc doc = new Doc()) {
doc.Read(_src);
FontTracker tracker = new FontTracker(doc);
for (int i = 0; i < doc.PageNumber; i++)
{
doc.PageNumber = i + 1;
using (XRect rect = doc.Rect) {
List <TextFragment> toKeep = new List <TextFragment>();
List <TextFragment> fragments = FindFont(doc, toKeep);
foreach (TextFragment fragment in toKeep)
{
tracker.Keep(fragment);
}
SimpleRedaction.RedactTextOps(doc, fragments);
doc.Flatten();
}
}
tracker.PurgeForm();
tracker.Purge();
string dst = Path.Combine(Directory.GetParent(_src).FullName, "_" + Path.GetRandomFileName() + ".pdf");
doc.Save(dst);
_src = dst;
UpdateDoc();
}
}
private void button1_Click(object sender, System.EventArgs e)
{
// Here we look at an area on the page and redact the text in it
XRect toRedact = new XRect(textBoxRect.Text);
using (Doc doc = new Doc()) {
doc.Read(_src);
TextOperation op = new TextOperation(doc);
op.PageContents.AddPages(1);
string text = op.GetText(toRedact, 1);
IList <TextFragment> fragments = op.Select(0, text.Length);
if (radioButtonCoarse.Checked)
{
SimpleRedaction.RedactTextOps(doc, fragments);
}
else
{
FineRedaction.RedactCharacters(doc, fragments);
}
doc.Flatten();
string dst = Path.Combine(Directory.GetParent(_src).FullName, "_" + Path.GetRandomFileName() + ".pdf");
doc.Save(dst);
_src = dst;
UpdateDoc();
}
}
private void button2_Click(object sender, EventArgs e)
{
// here we search for some text on the page and then redact it
using (Doc doc = new Doc()) {
doc.Read(_src);
using (XRect rect = doc.Rect) {
List <TextFragment> fragments = FindText(doc);
if (radioButtonCoarse.Checked)
{
SimpleRedaction.RedactTextOps(doc, fragments);
}
else
{
FineRedaction.RedactCharacters(doc, fragments);
}
doc.Flatten();
}
string dst = Path.Combine(Directory.GetParent(_src).FullName, "_" + Path.GetRandomFileName() + ".pdf");
doc.Save(dst);
_src = dst;
UpdateDoc();
}
}