PDFWriter.java

//
// Android PDF Writer
// http://coderesearchlabs.com/androidpdfwriter
//
// by Javier Santo Domingo (j-a-s-d@coderesearchlabs.com)
//

package totalcross.util.pdf;

import totalcross.io.*;
import totalcross.ui.image.*;

public class PDFWriter
{
   private PDFDocument mDocument;
   private IndirectObject mCatalog;
   private Pages mPages;
   private Page mCurrentPage;

   public PDFWriter()
   {
      newDocument(PaperSize.A4_WIDTH, PaperSize.A4_HEIGHT);
   }

   public PDFWriter(int pageWidth, int pageHeight)
   {
      newDocument(pageWidth, pageHeight);
   }

   private void newDocument(int pageWidth, int pageHeight)
   {
      mDocument = new PDFDocument();
      mCatalog = mDocument.newIndirectObject();
      mDocument.includeIndirectObject(mCatalog);
      mPages = new Pages(mDocument, pageWidth, pageHeight);
      mDocument.includeIndirectObject(mPages.getIndirectObject());
      renderCatalog();
      newPage();
   }

   private void renderCatalog()
   {
      mCatalog.setDictionaryContent("  /Type /Catalog\n  /Pages " + mPages.getIndirectObject().getIndirectReference() + "\n");
   }

   public void newPage()
   {
      mCurrentPage = mPages.newPage();
      mDocument.includeIndirectObject(mCurrentPage.getIndirectObject());
      mPages.render();
   }

   public void setCurrentPage(int pageNumber)
   {
      mCurrentPage = mPages.getPageAt(pageNumber);
   }

   public int getPageCount()
   {
      return mPages.getCount();
   }

   public void setFont(String subType, String baseFont)
   {
      mCurrentPage.setFont(subType, baseFont);
   }

   public void setFont(String subType, String baseFont, String encoding)
   {
      mCurrentPage.setFont(subType, baseFont, encoding);
   }

   public void addRawContent(String rawContent)
   {
      mCurrentPage.addRawContent(rawContent);
   }

   public void addText(int leftPosition, int topPositionFromBottom, int fontSize, String text)
   {
      addText(leftPosition, topPositionFromBottom, fontSize, text, Transformation.DEGREES_0_ROTATION);
   }

   public void addText(int leftPosition, int topPositionFromBottom, int fontSize, String text, String transformation)
   {
      mCurrentPage.addText(leftPosition, topPositionFromBottom, fontSize, text, transformation);
   }

   public void addTextAsHex(int leftPosition, int topPositionFromBottom, int fontSize, String hex)
   {
      addTextAsHex(leftPosition, topPositionFromBottom, fontSize, hex, Transformation.DEGREES_0_ROTATION);
   }

   public void addTextAsHex(int leftPosition, int topPositionFromBottom, int fontSize, String hex, String transformation)
   {
      mCurrentPage.addTextAsHex(leftPosition, topPositionFromBottom, fontSize, hex, transformation);
   }

   public void addLine(int fromLeft, int fromBottom, int toLeft, int toBottom)
   {
      mCurrentPage.addLine(fromLeft, fromBottom, toLeft, toBottom);
   }

   public void addRectangle(int fromLeft, int fromBottom, int toLeft, int toBottom)
   {
      mCurrentPage.addRectangle(fromLeft, fromBottom, toLeft, toBottom);
   }

   public void addImage(int fromLeft, int fromBottom, Image Image) throws IOException
   {
      addImage(fromLeft, fromBottom, Image, Transformation.DEGREES_0_ROTATION);
   }

   public void addImage(int fromLeft, int fromBottom, Image Image, String transformation) throws IOException
   {
      final XObjectImage xImage = new XObjectImage(mDocument, Image);
      mCurrentPage.addImage(fromLeft, fromBottom, xImage.getWidth(), xImage.getHeight(), xImage, transformation);
   }

   public void addImage(int fromLeft, int fromBottom, int toLeft, int toBottom, Image Image) throws IOException
   {
      addImage(fromLeft, fromBottom, toLeft, toBottom, Image, Transformation.DEGREES_0_ROTATION);
   }

   public void addImage(int fromLeft, int fromBottom, int toLeft, int toBottom, Image Image, String transformation) throws IOException
   {
      mCurrentPage.addImage(fromLeft, fromBottom, toLeft, toBottom, new XObjectImage(mDocument, Image), transformation);
   }

   public void addImageKeepRatio(int fromLeft, int fromBottom, int width, int height, Image Image) throws IOException
   {
      addImageKeepRatio(fromLeft, fromBottom, width, height, Image, Transformation.DEGREES_0_ROTATION);
   }

   public void addImageKeepRatio(int fromLeft, int fromBottom, int width, int height, Image Image, String transformation) throws IOException
   {
      final XObjectImage xImage = new XObjectImage(mDocument, Image);
      final float imgRatio = (float) xImage.getWidth() / (float) xImage.getHeight();
      final float boxRatio = (float) width / (float) height;
      float ratio;
      if (imgRatio < boxRatio)
      {
         ratio = (float) width / (float) xImage.getWidth();
      }
      else
      {
         ratio = (float) height / (float) xImage.getHeight();
      }
      width = (int) (xImage.getWidth() * ratio);
      height = (int) (xImage.getHeight() * ratio);
      mCurrentPage.addImage(fromLeft, fromBottom, width, height, xImage, transformation);
   }

   public String asString()
   {
      mPages.render();
      return mDocument.toPDFString();
   }
}