added Cay Horstmann's printing code for postscript.

[git-p4: depot-paths = "//depot/code/antlr4/main/": change = 9254]

runtime/Java/src/org/antlr/v4/runtime/RuleContext.java

@@ -36,6 +36,8 @@ import org.antlr.v4.runtime.tree.ParseTreeListener;
 import org.antlr.v4.runtime.tree.Trees;
 import org.antlr.v4.runtime.tree.gui.TreeViewer;
 
+import javax.print.PrintException;
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -307,6 +309,13 @@ public class RuleContext implements ParseTree.RuleNode {
 		viewer.open();
 	}
 
+	public void save(BaseRecognizer parser, String fileName)
+		throws IOException, PrintException
+	{
+		TreeViewer viewer = new TreeViewer(parser, this);
+		viewer.save(fileName);
+	}
+
 	/** Print out a whole tree, not just a node, in LISP format
 	 *  (root child1 .. childN). Print just a node if this is a leaf.
 	 *  We have to know the recognizer so we can get rule names.

runtime/Java/src/org/antlr/v4/runtime/misc/GraphicsSupport.java

@@ -0,0 +1,120 @@
+/*
+ [The "BSD license"]
+  Copyright (c) 2011 Terence Parr
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions
+  are met:
+
+  1. Redistributions of source code must retain the above copyright
+     notice, this list of conditions and the following disclaimer.
+  2. Redistributions in binary form must reproduce the above copyright
+     notice, this list of conditions and the following disclaimer in the
+     documentation and/or other materials provided with the distribution.
+  3. The name of the author may not be used to endorse or promote products
+     derived from this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package org.antlr.v4.runtime.misc;
+
+import javax.imageio.ImageIO;
+import javax.print.*;
+import javax.print.attribute.HashPrintRequestAttributeSet;
+import javax.print.attribute.PrintRequestAttributeSet;
+import javax.swing.*;
+import java.awt.*;
+import java.awt.image.BufferedImage;
+import java.awt.print.PageFormat;
+import java.awt.print.Printable;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+public class GraphicsSupport {
+	/**
+	 [The "BSD license"]
+	 Copyright (c) 2011 Cay Horstmann
+	 All rights reserved.
+
+	 Redistribution and use in source and binary forms, with or without
+	 modification, are permitted provided that the following conditions
+	 are met:
+
+	 1. Redistributions of source code must retain the above copyright
+	 notice, this list of conditions and the following disclaimer.
+	 2. Redistributions in binary form must reproduce the above copyright
+	 notice, this list of conditions and the following disclaimer in the
+	 documentation and/or other materials provided with the distribution.
+	 3. The name of the author may not be used to endorse or promote products
+	 derived from this software without specific prior written permission.
+
+	 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+	 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+	 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+	 IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+	 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+	 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+	 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+	 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+	 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+	 THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+	 */
+	public static void saveImage(final JComponent comp, String fileName)
+		throws IOException, PrintException
+	{
+		if (fileName.endsWith(".ps") || fileName.endsWith(".eps")) {
+			DocFlavor flavor = DocFlavor.SERVICE_FORMATTED.PRINTABLE;
+			String mimeType = "application/postscript";
+			StreamPrintServiceFactory[] factories =
+				StreamPrintServiceFactory.lookupStreamPrintServiceFactories(flavor, mimeType);
+			FileOutputStream out = new FileOutputStream(fileName);
+			if (factories.length > 0) {
+				PrintService service = factories[0].getPrintService(out);
+				SimpleDoc doc = new SimpleDoc(new Printable() {
+					public int print(Graphics g, PageFormat pf, int page) {
+						if (page >= 1) return Printable.NO_SUCH_PAGE;
+						else {
+							double sf1 = pf.getImageableWidth() / (comp.getWidth() + 1);
+							double sf2 = pf.getImageableHeight() / (comp.getHeight() + 1);
+							double s = Math.min(sf1, sf2);
+							Graphics2D g2 = (Graphics2D) g;
+							g2.translate((pf.getWidth() - pf.getImageableWidth()) / 2,
+										 (pf.getHeight() - pf.getImageableHeight()) / 2);
+							g2.scale(s, s);
+
+							comp.paint(g);
+							return Printable.PAGE_EXISTS;
+						}
+					}
+				}, flavor, null);
+				DocPrintJob job = service.createPrintJob();
+				PrintRequestAttributeSet attributes = new HashPrintRequestAttributeSet();
+				job.print(doc, attributes);
+			}
+		} else {
+			Rectangle rect = comp.getBounds();
+			BufferedImage image = new BufferedImage(rect.width, rect.height,
+													BufferedImage.TYPE_INT_RGB);
+			Graphics2D g = (Graphics2D) image.getGraphics();
+			g.setColor(Color.WHITE);
+			g.fill(rect);
+			g.setColor(Color.BLACK);
+			comp.paint(g);
+			String extension = fileName.substring(fileName.lastIndexOf('.') + 1);
+			ImageIO.write(image, extension, new File(fileName));
+			g.dispose();
+		}
+	}
+}

runtime/Java/src/org/antlr/v4/runtime/tree/BaseAST.java

@@ -32,7 +32,10 @@ package org.antlr.v4.runtime.tree;
 import org.antlr.v4.runtime.BaseRecognizer;
 import org.antlr.v4.runtime.tree.gui.TreeViewer;
 
-import java.util.*;
+import javax.print.PrintException;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
 
 /** A generic AST implementation with no payload.  You must subclass to
  *  actually have any user data.  ANTLR v3 uses a list of children approach
@@ -258,6 +261,13 @@ public abstract class BaseAST implements AST {
 		viewer.open();
 	}
 
+	public void save(BaseRecognizer parser, String fileName)
+		throws IOException, PrintException
+	{
+		TreeViewer viewer = new TreeViewer(parser, this);
+		viewer.save(fileName);
+	}
+
 	/** Don't use standard tree printing mechanism since ASTs can have nil
 	 *  root nodes.
 	 */

runtime/Java/src/org/antlr/v4/runtime/tree/gui/TreeViewer.java

@@ -34,12 +34,15 @@ import org.abego.treelayout.TreeForTreeLayout;
 import org.abego.treelayout.TreeLayout;
 import org.abego.treelayout.util.DefaultConfiguration;
 import org.antlr.v4.runtime.BaseRecognizer;
+import org.antlr.v4.runtime.misc.GraphicsSupport;
 import org.antlr.v4.runtime.tree.Tree;
 import org.antlr.v4.runtime.tree.Trees;
 
+import javax.print.PrintException;
 import javax.swing.*;
 import java.awt.*;
 import java.awt.geom.Rectangle2D;
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collection;
 
@@ -211,6 +214,10 @@ public class TreeViewer extends JComponent {
 		showInDialog(this);
 	}
 
+	public void save(String fileName) throws IOException, PrintException {
+		GraphicsSupport.saveImage(this, fileName);
+	}
+
 	// ---------------------------------------------------
 
 	public void setFontSize(int sz) {

tool/playground/TestT.java

@@ -50,7 +50,7 @@ public class TestT {
 		System.out.println(tree.toStringTree(p));
 		TreeViewer v = new TreeViewer(p, tree);
 		v.setHighlightedBoxColor(new Color(217, 189, 187));
-		v.addHighlightNodes(new ArrayList<Tree>(){{
+		v.addHighlightNodes(new ArrayList<Tree>() {{
 			ParseTree c0 = tree.getChild(0);
 			add(c0);
 			add(c0.getChild(0));