title: How do you track the location of PDPageContentStream's text output?
body: <p>I am using Java to write output to a <code>PDDocument</code>, then appending that document to an existing one before serving it to the client.</p>
  
  <p>Most of it is working well. I only have a small problem trying to handle content overflow while writing to that <code>PDDocument</code>.
  I want to keep track of where text is being inserted into the document so that when the "cursor" so to speak goes past a certain point, I'll create a new page, add it to the document, create a new content stream, and continue as normal.</p>
  
  <p>Here is some code that shows what I'd like to do:</p>
  
  <pre><code>// big try block
  PDDocument doc = new PDDocument();
  PDPage page = new PDPage();
  doc.addPage(page);
  PDPageContentStream content = new PDPageContentStream(doc, page);
  int fontSize = 12;
  
  content.beginText();
  content.setFont(...);
  content.moveTextPositionByAmount(margin, pageHeight-margin);
  for ( each element in a collection of values ) {
      content.moveTextPositionByAmount(0, -fontSize); // only moves down in document
  
      // at this point, check if past the end of page, if so add a new page
      if (content.getTextYPosition(...) &lt; margin) { // wishful thinking, doesn't exist
          content.endText();
          content.close();
          page = new PDPage();
          doc.addPage(page);
          content = new PDPageContentStream(doc, page);
          content.beginText();
          content.setFont(...);
          content.moveTextPositionByAmount(margin, pageHeight-(margin+fontSize));
      }
      content.drawString(...);
  }
  content.endText();
  content.close();
  </code></pre>
  
  <p>The important bit is the <code>content.getTextYPosition()</code>. It doesn't actually exist, but I'm sure <code>PDPageContentStream</code> must be keeping track of a similar value. Is there any way to access this value?</p>
  
  <p>Thanks.</p>