questions.javascript.AddJavaScriptToForm.java Source code

Introduction

Here is the source code for questions.javascript.AddJavaScriptToForm.java

Source

/*
 * This example was written by Bruno Lowagie, author of the book
 * 'iText in Action' by Manning Publications (ISBN: 1932394796).
 * You can use this example as inspiration for your own applications.
 * The following license applies:
 * http://www.1t3xt.com/about/copyright/index.php?page=MIT
 */

package questions.javascript;

import java.awt.Color;
import java.io.FileOutputStream;
import java.io.IOException;

import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Element;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.AcroFields;
import com.lowagie.text.pdf.BaseFont;
import com.lowagie.text.pdf.PdfAction;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfDictionary;
import com.lowagie.text.pdf.PdfFormField;
import com.lowagie.text.pdf.PdfName;
import com.lowagie.text.pdf.PdfObject;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfStamper;
import com.lowagie.text.pdf.PdfWriter;
import com.lowagie.text.pdf.PushbuttonField;
import com.lowagie.text.pdf.RadioCheckField;
import com.lowagie.text.pdf.TextField;
import com.lowagie.text.pdf.AcroFields.Item;

public class AddJavaScriptToForm {

    public static final String FORM = "results/questions/javascript/form_without_js.pdf";
    public static final String RESULT = "results/questions/javascript/form_with_js.pdf";

    public static void main(String[] args) throws DocumentException, IOException {
        createPdf(FORM);
        addJavaScript(FORM, RESULT);
    }

    public static void createPdf(String filename) throws IOException, DocumentException {
        Document document = new Document();
        PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(filename));
        document.open();

        BaseFont bf = BaseFont.createFont();
        PdfContentByte directcontent = writer.getDirectContent();
        directcontent.beginText();
        directcontent.setFontAndSize(bf, 12);
        directcontent.showTextAligned(Element.ALIGN_LEFT, "Married?", 36, 770, 0);
        directcontent.showTextAligned(Element.ALIGN_LEFT, "YES", 58, 750, 0);
        directcontent.showTextAligned(Element.ALIGN_LEFT, "NO", 102, 750, 0);
        directcontent.showTextAligned(Element.ALIGN_LEFT, "Name partner?", 36, 730, 0);
        directcontent.endText();

        PdfFormField married = PdfFormField.createRadioButton(writer, true);
        married.setFieldName("married");
        married.setValueAsName("yes");
        Rectangle rectYes = new Rectangle(40, 766, 56, 744);
        RadioCheckField yes = new RadioCheckField(writer, rectYes, null, "yes");
        yes.setChecked(true);
        married.addKid(yes.getRadioField());
        Rectangle rectNo = new Rectangle(84, 766, 100, 744);
        RadioCheckField no = new RadioCheckField(writer, rectNo, null, "no");
        no.setChecked(false);
        married.addKid(no.getRadioField());
        writer.addAnnotation(married);

        Rectangle rect = new Rectangle(40, 710, 200, 726);
        TextField partner = new TextField(writer, rect, "partner");
        partner.setBorderColor(Color.BLACK);
        partner.setBorderWidth(0.5f);
        writer.addAnnotation(partner.getTextField());

        document.close();
    }

    public static void addJavaScript(String input, String output) throws IOException, DocumentException {
        PdfReader reader = new PdfReader(input);
        PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(output));
        stamper.getWriter()
                .addJavaScript("function setReadOnly(readonly) {" + "var partner = this.getField('partner');"
                        + "if(readonly) {" + "partner.value = '';" + "}" + "partner.readonly = readonly;" + " }"
                        + "function validate() {" + "var married = this.getField('married');"
                        + "var partner = this.getField('partner');"
                        + "if (married.value == 'yes' && partner.value == '') {"
                        + "app.alert('please enter the name of your partner');" + "}" + "else {"
                        + "this.submitForm({" + " cURL:\"http://1t3xt.info/examples/request.php\","
                        + " cSubmitAs: \"HTML\"" + "});" + "}" + " }");
        AcroFields form = stamper.getAcroFields();
        Item fd = form.getFieldItem("married");

        PdfDictionary dictYes = (PdfDictionary) PdfReader.getPdfObject((PdfObject) fd.getWidgetRef(0));
        PdfDictionary yesAction = dictYes.getAsDict(PdfName.AA);
        if (yesAction == null)
            yesAction = new PdfDictionary();
        yesAction.put(new PdfName("Fo"), PdfAction.javaScript("setReadOnly(false);", stamper.getWriter()));
        dictYes.put(PdfName.AA, yesAction);

        PdfDictionary dictNo = (PdfDictionary) PdfReader.getPdfObject((PdfObject) fd.getWidgetRef(1));
        PdfDictionary noAction = dictNo.getAsDict(PdfName.AA);
        if (noAction == null)
            noAction = new PdfDictionary();
        noAction.put(new PdfName("Fo"), PdfAction.javaScript("setReadOnly(true);", stamper.getWriter()));
        dictNo.put(PdfName.AA, noAction);

        PdfWriter writer = stamper.getWriter();
        PushbuttonField button = new PushbuttonField(writer, new Rectangle(40, 690, 200, 710), "submit");
        button.setText("validate and submit");
        button.setOptions(PushbuttonField.VISIBLE_BUT_DOES_NOT_PRINT);
        PdfFormField validateAndSubmit = button.getField();
        validateAndSubmit.setAction(PdfAction.javaScript("validate();", stamper.getWriter()));
        stamper.addAnnotation(validateAndSubmit, 1);

        stamper.close();
    }

}