GH-356 update PrintHelper to implement Printable to allows for print …

…jobs that are made up of different Doc types. (#357)

viewer/viewer-awt/src/main/java/org/icepdf/ri/common/print/PrintHelper.java

@@ -7,7 +7,11 @@
 import javax.print.*;
 import javax.print.attribute.*;
 import javax.print.attribute.standard.*;
+import java.awt.*;
 import java.awt.geom.Rectangle2D;
+import java.awt.print.PageFormat;
+import java.awt.print.Printable;
+import java.awt.print.PrinterException;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
@@ -17,7 +21,7 @@
 import java.util.concurrent.FutureTask;
 import java.util.regex.Pattern;
 
-public abstract class PrintHelper {
+public abstract class PrintHelper implements Printable {
 
  public static final PrintService[] EMPTY_PRINTSERVICE_ARRAY = new PrintService[0];
  private static final Pattern END_NEWLINE_PATTERN = Pattern.compile("[\r\n]+$");
@@ -269,6 +273,8 @@ public void setupPrintService(final PrintService printService,
 
  public abstract void print(PrintJobWatcher printJobWatcher) throws PrintException;
 
+ public abstract int print(Graphics graphics, PageFormat pageFormat, int i) throws PrinterException;
+
  /**
  * Print a range of pages from the document as specified by #setupPrintService.
  *

viewer/viewer-awt/src/main/java/org/icepdf/ri/common/print/PrintHelperImpl.java

@@ -46,7 +46,7 @@
  *
  * @since 2.0
  */
-public class PrintHelperImpl extends PrintHelper implements Printable {
+public class PrintHelperImpl extends PrintHelper {
 
  private static final Logger logger =
  Logger.getLogger(PrintHelperImpl.class.toString());