pdf/PDFPage.java

   1 package org.simantics.document.linking.report.pdf;
   2
   3 import java.awt.Font;
   4 import java.awt.FontMetrics;
   5 import java.awt.Graphics2D;
   6 import java.awt.font.FontRenderContext;
   7 import java.io.File;
   8 import java.io.FileOutputStream;
   9
  10 import com.lowagie.text.Document;
  11 import com.lowagie.text.Rectangle;
  12 import com.lowagie.text.pdf.PdfContentByte;
  13 import com.lowagie.text.pdf.PdfTemplate;
  14 import com.lowagie.text.pdf.PdfWriter;
  15
  16 public class PDFPage {
  17         public PDFPageStream stream;
  18         public Graphics2D g2d;
  19         public Document document;
  20         public PdfWriter writer;
  21         public File tempFile;
  22         public PdfContentByte cb;
  23         public PdfTemplate template = null;
  24         public Font font;
  25
  26         FontRenderContext frc;
  27         FontMetrics fm;
  28
  29         int currentPixel = 0;
  30         int currentLine = 0;
  31         int availableLines = 0;
  32
  33
  34         public PDFPage(PDFPageStream stream) throws Exception{
  35                 this.stream = stream;
  36                 Rectangle pageSize = stream.getPageSize();
  37                 document = new Document(pageSize);
  38                 tempFile = File.createTempFile("ReportGenerator", ".pdf");
  39                 writer = PdfWriter.getInstance(document, new FileOutputStream(tempFile));
  40                 document.open();
  41                 this.cb = writer.getDirectContent();
  42
  43
  44         writer.flush();
  45                 template = cb.createTemplate(pageSize.getWidth(), pageSize.getHeight());
  46                 g2d = template.createGraphics(pageSize.getWidth(), pageSize.getHeight());
  47                 g2d.translate(stream.marginLeft, stream.marginTop);
  48         g2d.setClip(0, 0, stream.contentWidth, stream.contentHeight);
  49         currentPixel = 0;
  50         currentLine = 1;
  51
  52         setFont(stream.getDefaultFont());
  53         }
  54
  55         protected int getLineHeight() {
  56                 return fm.getHeight();
  57         }
  58
  59         public boolean isOpen() {
  60                 return template != null;
  61         }
  62
  63         public void setFont(Font font) {
  64                 this.font = font;
  65                 g2d.setFont(font);
  66         fm = g2d.getFontMetrics();
  67         frc = new FontRenderContext(g2d.getTransform(), true, true);
  68         estimateAvailableLines();
  69         }
  70
  71         protected void estimateAvailableLines() {
  72                  availableLines = (int)Math.floor((stream.contentHeight-currentPixel)/getLineHeight());
  73         }
  74
  75         public Font getFont() {
  76                 return font;
  77         }
  78
  79         public void writeLine(String line) throws Exception{
  80                 writeLine(line, 0);
  81         }
  82
  83         public void writeLine(String line, int x) throws Exception{
  84                 g2d.drawString(line, x, currentPixel+getLineHeight());
  85                 currentLine++;
  86                 availableLines--;
  87                 currentPixel += getLineHeight();
  88                 stream.checkNextPage();
  89         }
  90
  91         public void close() {
  92                 g2d.dispose();
  93                 cb.addTemplate(template, 0, 0);
  94         template = null;
  95
  96                 document.close();
  97                 if (writer != null)
  98                         writer.close();
  99                 document = null;
 100                 writer = null;
 101                 cb = null;
 102                 g2d = null;
 103         }
 104 }