/*
 * $Id: Barcode.java 4784 2011-03-15 08:33:00Z blowagie $
 *
 * This file is part of the iText (R) project.
 * Copyright (c) 1998-2011 1T3XT BVBA
 * Authors: Bruno Lowagie, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * a covered work must retain the producer line in every PDF that is created
 * or manipulated using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */
package com.itextpdf.text.pdf;

import com.itextpdf.text.ExceptionConverter;
import com.itextpdf.text.Image;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.BaseColor;
/** Base class containing properties and methods common to all
 * barcode types.
 *
 * @author Paulo Soares
 */
public abstract class Barcode {
    /** A type of barcode */
    public static final int EAN13 = 1;
    /** A type of barcode */
    public static final int EAN8 = 2;
    /** A type of barcode */
    public static final int UPCA = 3;
    /** A type of barcode */
    public static final int UPCE = 4;
    /** A type of barcode */
    public static final int SUPP2 = 5;
    /** A type of barcode */
    public static final int SUPP5 = 6;
    /** A type of barcode */
    public static final int POSTNET = 7;
    /** A type of barcode */
    public static final int PLANET = 8;
    /** A type of barcode */
    public static final int CODE128 = 9;
    /** A type of barcode */
    public static final int CODE128_UCC = 10;
    /** A type of barcode */
    public static final int CODE128_RAW = 11;
    /** A type of barcode */
    public static final int CODABAR = 12;

    /** The minimum bar width.
     */
    protected float x;    

    /** The bar multiplier for wide bars or the distance between
     * bars for Postnet and Planet.
     */
    protected float n;
    
    /** The text font. <CODE>null</CODE> if no text.
     */
    protected BaseFont font;

    /** The size of the text or the height of the shorter bar
     * in Postnet.
     */    
    protected float size;
    
    /** If positive, the text distance under the bars. If zero or negative,
     * the text distance above the bars.
     */
    protected float baseline;
    
    /** The height of the bars.
     */
    protected float barHeight;
    
    /** The text alignment. Can be <CODE>Element.ALIGN_LEFT</CODE>,
     * <CODE>Element.ALIGN_CENTER</CODE> or <CODE>Element.ALIGN_RIGHT</CODE>.
     */
    protected int textAlignment;
    
    /** The optional checksum generation.
     */
    protected boolean generateChecksum;
    
    /** Shows the generated checksum in the the text.
     */
    protected boolean checksumText;
    
    /** Show the start and stop character '*' in the text for
     * the barcode 39 or 'ABCD' for codabar.
     */
    protected boolean startStopText;
    
    /** Generates extended barcode 39.
     */
    protected boolean extended;
    
    /** The code to generate.
     */
    protected String code = "";
    
    /** Show the guard bars for barcode EAN.
     */
    protected boolean guardBars;
    
    /** The code type.
     */
    protected int codeType;
    
    /** The ink spreading. */
    protected float inkSpreading = 0;
    
    /** Gets the minimum bar width.
     * @return the minimum bar width
     */
    public float getX() {
        return x;
    }
    
    /** Sets the minimum bar width.
     * @param x the minimum bar width
     */
    public void setX(float x) {
        this.x = x;
    }
    
    /** Gets the bar multiplier for wide bars.
     * @return the bar multiplier for wide bars
     */
    public float getN() {
        return n;
    }
    
    /** Sets the bar multiplier for wide bars.
     * @param n the bar multiplier for wide bars
     */
    public void setN(float n) {
        this.n = n;
    }
    
    /** Gets the text font. <CODE>null</CODE> if no text.
     * @return the text font. <CODE>null</CODE> if no text
     */
    public BaseFont getFont() {
        return font;
    }
    
    /** Sets the text font.
     * @param font the text font. Set to <CODE>null</CODE> to suppress any text
     */
    public void setFont(BaseFont font) {
        this.font = font;
    }
    
    /** Gets the size of the text.
     * @return the size of the text
     */
    public float getSize() {
        return size;
    }
    
    /** Sets the size of the text.
     * @param size the size of the text
     */
    public void setSize(float size) {
        this.size = size;
    }
    
    /** Gets the text baseline.
     * If positive, the text distance under the bars. If zero or negative,
     * the text distance above the bars.
     * @return the baseline.
     */
    public float getBaseline() {
        return baseline;
    }
    
    /** Sets the text baseline. 
     * If positive, the text distance under the bars. If zero or negative,
     * the text distance above the bars.
     * @param baseline the baseline.
     */
    public void setBaseline(float baseline) {
        this.baseline = baseline;
    }
    
    /** Gets the height of the bars.
     * @return the height of the bars
     */
    public float getBarHeight() {
        return barHeight;
    }
    
    /** Sets the height of the bars.
     * @param barHeight the height of the bars
     */
    public void setBarHeight(float barHeight) {
        this.barHeight = barHeight;
    }
    
    /** Gets the text alignment. Can be <CODE>Element.ALIGN_LEFT</CODE>,
     * <CODE>Element.ALIGN_CENTER</CODE> or <CODE>Element.ALIGN_RIGHT</CODE>.
     * @return the text alignment
     */
    public int getTextAlignment() {
        return textAlignment;
    }
    
    /** Sets the text alignment. Can be <CODE>Element.ALIGN_LEFT</CODE>,
     * <CODE>Element.ALIGN_CENTER</CODE> or <CODE>Element.ALIGN_RIGHT</CODE>.
     * @param textAlignment the text alignment
     */
    public void setTextAlignment(int textAlignment) {
        this.textAlignment = textAlignment;
    }
    
    /** Gets the optional checksum generation.
     * @return the optional checksum generation
     */
    public boolean isGenerateChecksum() {
        return generateChecksum;
    }
    
    /** Setter for property generateChecksum.
     * @param generateChecksum New value of property generateChecksum.
     */
    public void setGenerateChecksum(boolean generateChecksum) {
        this.generateChecksum = generateChecksum;
    }
    
    /** Gets the property to show the generated checksum in the the text.
     * @return value of property checksumText
     */
    public boolean isChecksumText() {
        return checksumText;
    }
    
    /** Sets the property to show the generated checksum in the the text.
     * @param checksumText new value of property checksumText
     */
    public void setChecksumText(boolean checksumText) {
        this.checksumText = checksumText;
    }
    
    /** Sets the property to show the start and stop character '*' in the text for
     * the barcode 39.
     * @return value of property startStopText
     */
    public boolean isStartStopText() {
        return startStopText;
    }
    
    /** Gets the property to show the start and stop character '*' in the text for
     * the barcode 39.
     * @param startStopText new value of property startStopText
     */
    public void setStartStopText(boolean startStopText) {
        this.startStopText = startStopText;
    }
    
    /** Gets the property to generate extended barcode 39.
     * @return value of property extended.
     */
    public boolean isExtended() {
        return extended;
    }
    
    /** Sets the property to generate extended barcode 39.
     * @param extended new value of property extended
     */
    public void setExtended(boolean extended) {
        this.extended = extended;
    }
    
    /** Gets the code to generate.
     * @return the code to generate
     */
    public String getCode() {
        return code;
    }
    
    /** Sets the code to generate.
     * @param code the code to generate
     */
    public void setCode(String code) {
        this.code = code;
    }
    
    /** Gets the property to show the guard bars for barcode EAN.
     * @return value of property guardBars
     */
    public boolean isGuardBars() {
        return guardBars;
    }
    
    /** Sets the property to show the guard bars for barcode EAN.
     * @param guardBars new value of property guardBars
     */
    public void setGuardBars(boolean guardBars) {
        this.guardBars = guardBars;
    }
    
    /** Gets the code type.
     * @return the code type
     */
    public int getCodeType() {
        return codeType;
    }
    
    /** Sets the code type.
     * @param codeType the code type
     */
    public void setCodeType(int codeType) {
        this.codeType = codeType;
    }
    
    /** Gets the maximum area that the barcode and the text, if
     * any, will occupy. The lower left corner is always (0, 0).
     * @return the size the barcode occupies.
     */    
    public abstract Rectangle getBarcodeSize();
    
    /** Places the barcode in a <CODE>PdfContentByte</CODE>. The
     * barcode is always placed at coordinates (0, 0). Use the
     * translation matrix to move it elsewhere.<p>
     * The bars and text are written in the following colors:<p>
     * <P><TABLE BORDER=1>
     * <TR>
     *    <TH><P><CODE>barColor</CODE></TH>
     *    <TH><P><CODE>textColor</CODE></TH>
     *    <TH><P>Result</TH>
     *    </TR>
     * <TR>
     *    <TD><P><CODE>null</CODE></TD>
     *    <TD><P><CODE>null</CODE></TD>
     *    <TD><P>bars and text painted with current fill color</TD>
     *    </TR>
     * <TR>
     *    <TD><P><CODE>barColor</CODE></TD>
     *    <TD><P><CODE>null</CODE></TD>
     *    <TD><P>bars and text painted with <CODE>barColor</CODE></TD>
     *    </TR>
     * <TR>
     *    <TD><P><CODE>null</CODE></TD>
     *    <TD><P><CODE>textColor</CODE></TD>
     *    <TD><P>bars painted with current color<br>text painted with <CODE>textColor</CODE></TD>
     *    </TR>
     * <TR>
     *    <TD><P><CODE>barColor</CODE></TD>
     *    <TD><P><CODE>textColor</CODE></TD>
     *    <TD><P>bars painted with <CODE>barColor</CODE><br>text painted with <CODE>textColor</CODE></TD>
     *    </TR>
     * </TABLE>
     * @param cb the <CODE>PdfContentByte</CODE> where the barcode will be placed
     * @param barColor the color of the bars. It can be <CODE>null</CODE>
     * @param textColor the color of the text. It can be <CODE>null</CODE>
     * @return the dimensions the barcode occupies
     */    
    public abstract Rectangle placeBarcode(PdfContentByte cb, BaseColor barColor, BaseColor textColor);
    
    /** Creates a template with the barcode.
     * @param cb the <CODE>PdfContentByte</CODE> to create the template. It
     * serves no other use
     * @param barColor the color of the bars. It can be <CODE>null</CODE>
     * @param textColor the color of the text. It can be <CODE>null</CODE>
     * @return the template
     * @see #placeBarcode(PdfContentByte cb, BaseColor barColor, BaseColor textColor)
     */    
    public PdfTemplate createTemplateWithBarcode(PdfContentByte cb, BaseColor barColor, BaseColor textColor) {
        PdfTemplate tp = cb.createTemplate(0, 0);
        Rectangle rect = placeBarcode(tp, barColor, textColor);
        tp.setBoundingBox(rect);
        return tp;
    }
    
    /** Creates an <CODE>Image</CODE> with the barcode.
     * @param cb the <CODE>PdfContentByte</CODE> to create the <CODE>Image</CODE>. It
     * serves no other use
     * @param barColor the color of the bars. It can be <CODE>null</CODE>
     * @param textColor the color of the text. It can be <CODE>null</CODE>
     * @return the <CODE>Image</CODE>
     * @see #placeBarcode(PdfContentByte cb, BaseColor barColor, BaseColor textColor)
     */    
    public Image createImageWithBarcode(PdfContentByte cb, BaseColor barColor, BaseColor textColor) {
        try {
            return Image.getInstance(createTemplateWithBarcode(cb, barColor, textColor));
        }
        catch (Exception e) {
            throw new ExceptionConverter(e);
        }
    }
    
    /** Creates a <CODE>java.awt.Image</CODE>. This image only
     * contains the bars without any text.
     * @param foreground the color of the bars
     * @param background the color of the background
     * @return the image
     */    
    public abstract java.awt.Image createAwtImage(java.awt.Color foreground, java.awt.Color background);
    
    /** Gets the amount of ink spreading.
     * @return the ink spreading
     *
     */
    public float getInkSpreading() {
        return this.inkSpreading;
    }
    
    /** Sets the amount of ink spreading. This value will be subtracted
     * to the width of each bar. The actual value will depend on the ink
     * and the printing medium.
     * @param inkSpreading the ink spreading
     *
     */
    public void setInkSpreading(float inkSpreading) {
        this.inkSpreading = inkSpreading;
    }

    /**
     * The alternate text to be used, if present.
     */
    protected String altText;

    /**
     * Gets the alternate text.
     * @return the alternate text
     */
    public String getAltText() {
        return this.altText;
    }

    /**
     * Sets the alternate text. If present, this text will be used instead of the
     * text derived from the supplied code.
     * @param altText the alternate text
     */
    public void setAltText(String altText) {
        this.altText = altText;
    }
    
}