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The Apache Commons Codec package contains simple encoder and decoders for various formats such as Base64 and Hexadecimal. In addition to these widely used encoders and decoders, the codec package also maintains a collection of phonetic encoding utilities.

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/**
 * Copyright (C) 2011-2015 The XDocReport Team 
 *
 * All rights reserved.
 *
 * Permission is hereby granted, free  of charge, to any person obtaining
 * a  copy  of this  software  and  associated  documentation files  (the
 * "Software"), to  deal in  the Software without  restriction, including
 * without limitation  the rights to  use, copy, modify,  merge, publish,
 * distribute,  sublicense, and/or sell  copies of  the Software,  and to
 * permit persons to whom the Software  is furnished to do so, subject to
 * the following conditions:
 *
 * The  above  copyright  notice  and  this permission  notice  shall  be
 * included in all copies or substantial portions of the Software.
 *
 * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
 * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
 * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package fr.opensagres.xdocreport.itext.extension;

import com.lowagie.text.Document;
import com.lowagie.text.pdf.PdfPageEventHelper;
import com.lowagie.text.pdf.PdfWriter;

/**
 * fixes for pdf conversion by Leszek Piotrowicz 
 */
public class ExtendedHeaderFooter
    extends PdfPageEventHelper
{
    protected final ExtendedDocument document;

    private IMasterPage masterPage;

    public ExtendedHeaderFooter( ExtendedDocument document )
    {
        this.document = document;
    }

    /**
     * Adds a header/footer to every page
     * 
     * @see com.itextpdf.text.pdf.PdfPageEventHelper#onEndPage(com.itextpdf.text.pdf.PdfWriter,
     *      com.itextpdf.text.Document)
     */
    public void onStartPage( PdfWriter writer, Document doc )
    {
        if ( masterPage == null )
        {
            masterPage = document.getDefaultMasterPage();
        }

        if ( masterPage != null )
        {
            // Master page is defined

            IMasterPageHeaderFooter header = masterPage.getHeader();
            IMasterPageHeaderFooter footer = masterPage.getFooter();

            // Add header
            if ( header != null )
            {
                // compute upper-left corner coordinates
                float x = document.getOriginMarginLeft();
                float y = getHeaderY( header );

                header.writeSelectedRows( 0, -1, x, y, writer.getDirectContentUnder() );
            }

            // Add footer
            if ( footer != null )
            {
                // compute upper-left corner coordinates
                float x = document.getOriginMarginLeft();
                float y = getFooterY( footer );

                footer.writeSelectedRows( 0, -1, x, y, writer.getDirectContentUnder() );
            }
        }
    }

    protected float getFooterY( IMasterPageHeaderFooter footer )
    {
        return document.getOriginMarginBottom() + footer.getTotalHeight();
    }

    protected float getHeaderY( IMasterPageHeaderFooter header )
    {
        return document.getPageSize().getHeight() - document.getOriginMarginTop();
    }

    public void setMasterPage( IMasterPage masterPage )
    {
        IMasterPageHeaderFooter header = masterPage.getHeader();
        IMasterPageHeaderFooter footer = masterPage.getFooter();

        float marginLeft = document.getOriginMarginLeft();
        float marginRight = document.getOriginMarginRight();
        float marginTop = document.getOriginMarginTop();
        if ( header != null )
        {
            marginTop = adjustMargin(marginTop, header);
        }
        float marginBottom = document.getOriginMarginBottom();
        if ( footer != null )
        {
            marginBottom = adjustMargin(marginBottom, footer);
        }
        document.setMargins( marginLeft, marginRight, marginTop, marginBottom );

        this.masterPage = masterPage;
    }
    
    protected float adjustMargin(float margin, IMasterPageHeaderFooter headerFooter) {
        return margin + headerFooter.getTotalHeight();
    }

    public IMasterPage getMasterPage()
    {
        return masterPage;
    }
}