package sample;

import jaxcent.*;

import java.io.*;
import com.lowagie.text.*;
import com.lowagie.text.pdf.*;

/**
  * Jaxcent PDF creation sample using the iText Java PDF-building API.
  * Note that "session" must be enabled for the page, because the Jaxcent URL
  * stores the PDF bytes in the session.
  */

public class PdfSample extends jaxcent.JaxcentPage {

    HtmlButton build = new HtmlButton( this, "build" ) {
        public void onClick( java.util.Map data ) {
            onBuild( data );
        }
    };

    HtmlInlineFrame ifr = null;  // If displaying using IFRAME

    public void onBuild( java.util.Map data )
    {
        try {

            // Retrieve name and "new window" values.

            String name = (String) data.get( "name" );
            if ( name == null || name.trim().equals( "" ))
                name = "Unknown Visitor";
            String show = (String) data.get( "show" );

            // build PDF document.

            byte[] pdfBytes = buildPdfDocument( name );

            // Make a Jaxcent URL that stores the bytes in the session, and returns them.

            String url = makeContentURL( "application/pdf", pdfBytes, "sample.pdf" );

            if ( ifr != null ) {

                // If there was an earlier inline display, remove it.

                ifr.deleteElement();
            }

            // If inline display, create an HTML IFrame and display in that.
            if ( show.equals( "inline" )) {
                ifr = new HtmlInlineFrame( this, SearchType.createNew, "IFRAME" );
                ifr.setHeight( "300px" );
                ifr.setWidth( "90%" );
                ifr.setScrolling( "auto" );
                ifr.setSrc( url );

                // Note:  For Internet Explorer, src must be set before iframe is inserted in document.

                ifr.insertAtEnd();
            } else if ( show.equals( "window" )) {
                navigate( url );
            } else {
                // Insert a Para in the document containing the link to the new document.

                HtmlPara p = new HtmlPara( this, SearchType.createNew, "P", "" );
                p.insertAtEnd();
                HtmlAnchor a = new HtmlAnchor( this, SearchType.createNew, "A", "Click to view PDF Document" );
                a.insertAtBeginning( p );

                a.setHref( url );	// Make the link point to the Jaxcent URL for the PDF

                if ( show.equals( "linknew" ))
                    a.setTarget( "_blank" );
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    // Build PDF document, return bytes.

    byte[] buildPdfDocument( String visitorName ) throws DocumentException
    {
        // Build PDF document, and retrieve its byte content

        ByteArrayOutputStream baosPDF = new ByteArrayOutputStream();

        Document doc = new Document();
        PdfWriter docWriter = PdfWriter.getInstance(doc, baosPDF);
        doc.open();
        doc.add( new Paragraph( "Dear " + visitorName ));
        doc.add( new Paragraph( "This sample PDF was created for you at " + new java.util.Date()));
        doc.add( new Paragraph( "The technique demonstrated in this sample can be used for PDF and other types of generated documentation." ));
        doc.close();
        docWriter.close();
        return baosPDF.toByteArray();
    }
}