private void ParseAndHighlight(String input, String output, bool singleCharacters)
{
PdfReader reader = new PdfReader(input);
FileStream fos = new FileStream(output, FileMode.Create);
PdfStamper stamper = new PdfStamper(reader, fos);
PdfReaderContentParser parser = new PdfReaderContentParser(reader);
MyRenderListener myRenderListener = singleCharacters ? new MyCharacterRenderListener() : new MyRenderListener();
for (int pageNum = 1; pageNum <= reader.NumberOfPages; pageNum++)
{
List <Rectangle> rectangles = parser.ProcessContent(pageNum, myRenderListener).GetRectangles();
PdfContentByte canvas = stamper.GetOverContent(pageNum);
canvas.SetLineWidth(0.5f);
canvas.SetColorStroke(BaseColor.RED);
foreach (Rectangle rectangle in rectangles)
{
canvas.Rectangle(rectangle.Left, rectangle.Bottom, rectangle.Width, rectangle.Height);
canvas.Stroke();
}
}
stamper.Close();
fos.Close();
reader.Close();
}
/// <summary>
/// Parses a page of a PDF file resulting in a list of
/// TextItem and ImageItem objects.
/// </summary>
/// <param name="reader">a PdfReader</param>
/// <param name="page">the page number of the page that needs to be parsed</param>
/// <param name="header_height">header_height the height of the top margin</param>
/// <returns>a list of TextItem and ImageItem objects</returns>
public List <MyItem> GetContentItems(PdfReader reader, int page, float header_height)
{
PdfReaderContentParser parser = new PdfReaderContentParser(reader);
Rectangle pageSize = reader.GetPageSize(page);
MyRenderListener myRenderListener = new MyRenderListener(pageSize.Top - header_height);
parser.ProcessContent(page, myRenderListener);
return(myRenderListener.Items);
}
