bundles/org.simantics.document.linking.ui/src/org/simantics/document/linking/report/pdf/PDFPage.java

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