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added PS support routines 

[git-p4: depot-paths = "//depot/code/antlr4/main/": change = 9154]
This commit is contained in:
parrt 2011-10-22 11:46:13 -08:00
parent 78bc92d81b
commit 39314b8d74
1 changed files with 33 additions and 0 deletions
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33
runtime/Java/src/org/antlr/v4/runtime/tree/Trees.java
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@ -30,11 +30,44 @@
package org.antlr.v4.runtime.tree;
import org.antlr.v4.runtime.*;
import org.antlr.v4.runtime.tree.gui.TreePostScriptGenerator;
import java.io.*;
import java.util.*;
/** A set of utility routines useful for all kinds of ANTLR trees */
public class Trees {
public static String getPS(Tree t, BaseRecognizer recog,
String fontName, int fontSize)
{
TreePostScriptGenerator psgen =
new TreePostScriptGenerator(null, t, fontName, fontSize);
return psgen.getPS();
}
public static String getPS(Tree t, BaseRecognizer recog) {
return getPS(t, recog, "Arial", 11);
}
public static void writePS(Tree t, BaseRecognizer recog,
String fileName,
String fontName, int fontSize)
throws IOException
{
String ps = getPS(t, recog, fontName, fontSize);
FileWriter f = new FileWriter(fileName);
BufferedWriter bw = new BufferedWriter(f);
bw.write(ps);
bw.close();
}
public static void writePS(Tree t, BaseRecognizer recog, String fileName)
throws IOException
{
writePS(t, recog, fileName, "Arial", 11);
}
/** Print out a whole tree in LISP form. getNodeText is used on the
* node payloads to get the text for the nodes. Detect
* parse trees and extract data appropriately.