Updated old driver to deal with the new deal.

git-svn-id: https://samskivert.googlecode.com/svn/trunk@497 6335cc39-0255-0410-8fd6-9bcaacd3b74c

projects/viztool/src/java/com/samskivert/viztool/DriverTask.java

@@ -1,5 +1,5 @@
 //
-// $Id: DriverTask.java,v 1.1 2001/12/03 08:34:53 mdb Exp $
+// $Id: DriverTask.java,v 1.2 2001/12/03 08:53:45 mdb Exp $
 // 
 // viztool - a tool for visualizing collections of java classes
 // Copyright (C) 2001 Michael Bayne
@@ -20,9 +20,21 @@
 
 package com.samskivert.viztool;
 
+import java.awt.print.PageFormat;
+import java.awt.print.Paper;
+import java.awt.print.PrinterException;
+import java.awt.print.PrinterJob;
+
+import javax.print.attribute.HashPrintRequestAttributeSet;
+import javax.print.attribute.PrintRequestAttributeSet;
+import javax.print.attribute.standard.Destination;
+
 import java.io.File;
 import java.io.IOException;
 
+import java.net.URI;
+import java.net.URISyntaxException;
+
 import java.util.ArrayList;
 
 import org.apache.tools.ant.AntClassLoader;
@@ -69,6 +81,11 @@ public class DriverTask extends Task
         _classes = classes;
     }
 
+    public void setOutput (File output)
+    {
+        _output = output;
+    }
+
     public Path createClasspath ()
     {
         return _cmdline.createClasspath(project).createPath();
@@ -79,11 +96,21 @@ public class DriverTask extends Task
      */
     public void execute () throws BuildException
     {
+        // make sure everything was set up properly
+        ensureSet(_vizclass, "Must specify the visualizer class " +
+                  "via the 'visualizer' attribute.");
+        ensureSet(_pkgroot, "Must specify the package root " +
+                  "via the 'pkgroot' attribute.");
+        ensureSet(_pkgroot, "Must specify the class regular expression " +
+                  "via the 'classes' attribute.");
+        Path classpath = _cmdline.getClasspath();
+        ensureSet(classpath, "Must provide a <classpath> subelement " +
+                  "describing the classpath to be searched for classes.");
+
         // initialize the font picker
-        FontPicker.init(false);
+        FontPicker.init(_output != null);
 
         // create the classloader we'll use to load the visualized classes
-        Path classpath = _cmdline.getClasspath();
         ClassLoader cl = new AntClassLoader(null, project, classpath, false);
 
         // scan the classpath and determine which classes will be
@@ -135,6 +162,8 @@ public class DriverTask extends Task
         viz.setPackageRoot(_pkgroot);
         viz.setClasses(classes.iterator());
 
+        // if no output file was specified, pop up a window
+        if (_output == null) {
             VizFrame frame = new VizFrame(viz);
             frame.pack();
             SwingUtil.centerWindow(frame);
@@ -149,11 +178,56 @@ public class DriverTask extends Task
                     }
                 }
             }
+
+        } else {
+            // we use the print system to render things
+            PrinterJob job = PrinterJob.getPrinterJob();
+
+            // use sensible margins
+            PageFormat format = job.defaultPage();
+            Paper paper = new Paper();
+            paper.setImageableArea(72*0.5, 72*0.5, 72*7.5, 72*10);
+            format.setPaper(paper);
+
+            // use our configured page format
+            job.setPrintable(viz, format);
+
+            // tell our printjob to print to a file
+            PrintRequestAttributeSet attrs =
+                new HashPrintRequestAttributeSet();
+            String outpath = _output.getPath();
+            try {
+                URI target = new URI("file:" + outpath);
+                attrs.add(new Destination(target));
+
+            } catch (URISyntaxException use) {
+                String errmsg = "Can't create URI for 'output' file path? " +
+                    "[output=" + outpath + "].";
+                throw new BuildException(errmsg, use);
+            }
+
+            // invoke the printing process
+            try {
+                log("Generating visualization to '" + outpath + "'.");
+                job.print(attrs);
+            } catch (PrinterException pe) {
+                throw new BuildException("Error printing visualization.", pe);
+            }
+        }
+    }
+
+    protected void ensureSet (Object value, String errmsg)
+        throws BuildException
+    {
+        if (value == null) {
+            throw new BuildException(errmsg);
+        }
     }
 
     protected String _vizclass;
     protected String _pkgroot;
     protected String _classes;
+    protected File _output;
 
     // use use this for accumulating our classpath
     protected CommandlineJava _cmdline = new CommandlineJava();