/**
 * Example written by Bruno Lowagie in answer to the following question:
 * http://stackoverflow.com/questions/24404413/increase-width-of-acrofieldsitextsharp
 */
package sandbox.acroforms;

import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.AcroFields;
import com.itextpdf.text.pdf.AcroFields.Item;
import com.itextpdf.text.pdf.PdfArray;
import com.itextpdf.text.pdf.PdfDictionary;
import com.itextpdf.text.pdf.PdfName;
import com.itextpdf.text.pdf.PdfNumber;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfStamper;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import sandbox.WrapToTest;

@WrapToTest
public class ChangeFieldSize {

    public static final String SRC = "resources/pdfs/form.pdf";
    public static final String DEST = "results/acroforms/field_changed.pdf";
    

    public static void main(String[] args) throws DocumentException, IOException {
        File file = new File(DEST);
        file.getParentFile().mkdirs();
        new ChangeFieldSize().manipulatePdf(SRC, DEST);
    }

    public void manipulatePdf(String src, String dest) throws DocumentException, IOException {
        PdfReader reader = new PdfReader(src);
        PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
        AcroFields form = stamper.getAcroFields();
        Item item = form.getFieldItem("Name");
        PdfDictionary widget = item.getWidget(0);
        PdfArray rect = widget.getAsArray(PdfName.RECT);
        rect.set(2, new PdfNumber(rect.getAsNumber(2).floatValue() + 20f));
        String value = "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
        form.setField("Name", value);
        form.setField("Company", value);
        stamper.close();
    }
}