package br.com.caelum.stella.boleto.transformer;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import br.com.caelum.stella.boleto.GeracaoBoletoException;
import com.lowagie.text.BadElementException;
import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Image;
import com.lowagie.text.PageSize;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.BaseFont;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfTemplate;
import com.lowagie.text.pdf.PdfWriter;
/**
* Writer que sabe escrever num PDF usando IText como dependencia.
*
* @see <a
* href="http://stella.caelum.com.br/boleto-setup.html">http://stella.caelum.com.br/boleto-setup.html</a>
*
* @author Cauê Guerra
* @author Paulo Silveira
* @author Leonardo Bessa
*/
public class PDFBoletoWriter implements BoletoWriter {
private static final int NORMAL_SIZE = 8;
private static final int BIG_SIZE = 10;
private InputStream stream;
private final ByteArrayOutputStream bytes;
private final Document document;
private PdfWriter writer;
private BaseFont fonteSimples;
private BaseFont fonteBold;
private final PdfContentByte contentByte;
private final int scale = 1;
public PDFBoletoWriter(Rectangle rectangle) {
this.bytes = new ByteArrayOutputStream();
this.document = new Document(rectangle);
try {
this.writer = PdfWriter.getInstance(this.document, this.bytes);
this.fonteSimples = BaseFont.createFont(BaseFont.HELVETICA,
BaseFont.WINANSI, BaseFont.EMBEDDED);
this.fonteBold = BaseFont.createFont(BaseFont.HELVETICA_BOLD,
BaseFont.WINANSI, BaseFont.EMBEDDED);
} catch (DocumentException e) {
throw new GeracaoBoletoException(e);
} catch (IOException e) {
throw new GeracaoBoletoException(e);
}
this.document.open();
this.contentByte = this.writer.getDirectContent();
this.document.newPage();
}
public PDFBoletoWriter() {
this(PageSize.A4);
}
public InputStream toInputStream() {
if (this.stream == null) {
this.document.close();
this.stream = new ByteArrayInputStream(this.bytes.toByteArray());
}
return this.stream;
}
public void write(float x, float y, String text) {
write(x, y, text, this.fonteSimples, NORMAL_SIZE * this.scale);
}
public void writeBold(float x, float y, String text) {
write(x, y, text, this.fonteBold, BIG_SIZE * this.scale);
}
private void write(float x, float y, String text, BaseFont font, int size) {
checkIfDocIsClosed();
this.contentByte.beginText();
this.contentByte.setFontAndSize(font, size);
final float leftMargin = this.document.leftMargin();
this.contentByte.setTextMatrix(leftMargin + x, y);
this.contentByte.showText(text);
this.contentByte.endText();
}
private void checkIfDocIsClosed() {
if (this.stream != null)
throw new IllegalStateException(
"boleto ja gerado, voce nao pode mais escrever na imagem");
}
public void writeImage(float x, float y, BufferedImage image, float width,
float height) throws IOException {
checkIfDocIsClosed();
try {
Image pdfImage = Image.getInstance(image, null);
pdfImage.setAbsolutePosition(0, 0);
pdfImage.scaleToFit(width, height);
PdfTemplate template = this.contentByte.createTemplate(image
.getWidth(), image.getHeight());
template.addImage(pdfImage);
final float leftMargin = this.document.leftMargin();
this.contentByte.addTemplate(template, leftMargin + x, y);
} catch (BadElementException e) {
throw new GeracaoBoletoException(e);
} catch (DocumentException e) {
throw new GeracaoBoletoException(e);
}
}
public boolean newPage() {
return document.newPage();
}
}