private void DrawOverlayText(PdfCanvas canvas, String overlayText, Rectangle annotRect, PdfBoolean repeat,
PdfString defaultAppearance, int justification)
{
IDictionary <String, IList> parsedDA;
try {
parsedDA = ParseDAParam(defaultAppearance);
}
catch (NullReferenceException) {
throw new PdfException(PdfException.DefaultAppearanceNotFound);
}
PdfFont font;
float fontSize = 12;
IList fontArgs = parsedDA.Get("Tf");
PdfDictionary formDictionary = pdfDocument.GetCatalog().GetPdfObject().GetAsDictionary(PdfName.AcroForm);
if (fontArgs != null && formDictionary != null)
{
font = GetFontFromAcroForm((PdfName)fontArgs[0]);
fontSize = ((PdfNumber)fontArgs[1]).FloatValue();
}
else
{
font = PdfFontFactory.CreateFont();
}
if (pdfDocument.IsTagged())
{
canvas.OpenTag(new CanvasArtifact());
}
iText.Layout.Canvas modelCanvas = new iText.Layout.Canvas(canvas, pdfDocument, annotRect, false);
Paragraph p = new Paragraph(overlayText).SetFont(font).SetFontSize(fontSize).SetMargin(0);
TextAlignment? textAlignment = TextAlignment.LEFT;
switch (justification)
{
case 1: {
textAlignment = TextAlignment.CENTER;
break;
}
case 2: {
textAlignment = TextAlignment.RIGHT;
break;
}
default: {
break;
}
}
p.SetTextAlignment(textAlignment);
IList strokeColorArgs;
parsedDA.TryGetValue("StrokeColor", out strokeColorArgs);
if (strokeColorArgs != null)
{
p.SetStrokeColor(GetColor(strokeColorArgs));
}
IList fillColorArgs;
parsedDA.TryGetValue("FillColor", out fillColorArgs);
if (fillColorArgs != null)
{
p.SetFontColor(GetColor(fillColorArgs));
}
modelCanvas.Add(p);
if (repeat != null && repeat.GetValue())
{
bool?isFull = modelCanvas.GetRenderer().GetPropertyAsBoolean(Property.FULL);
while (isFull == null || (bool)!isFull)
{
p.Add(overlayText);
LayoutArea previousArea = modelCanvas.GetRenderer().GetCurrentArea().Clone();
modelCanvas.Relayout();
if (modelCanvas.GetRenderer().GetCurrentArea().Equals(previousArea))
{
// Avoid infinite loop. This might be caused by the fact that the font does not support the text we want to show
break;
}
isFull = modelCanvas.GetRenderer().GetPropertyAsBoolean(Property.FULL);
}
}
modelCanvas.GetRenderer().Flush();
if (pdfDocument.IsTagged())
{
canvas.CloseTag();
}
}