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/*
* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
* Use of this file is governed by the BSD 3-clause license that
* can be found in the LICENSE.txt file in the project root.
*/
package org.antlr.v4.gui;
import org.antlr.v4.runtime.Parser;
import org.antlr.v4.runtime.misc.Utils;
import org.antlr.v4.runtime.tree.Tree;
import javax.print.PrintException;
import javax.swing.*;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.Future;
public class Trees {
/** Call this method to view a parse tree in a dialog box visually. */
public static Future<JFrame> inspect(Tree t, List<String> ruleNames) {
TreeViewer viewer = new TreeViewer(ruleNames, t);
return viewer.open();
}
/** Call this method to view a parse tree in a dialog box visually. */
public static Future<JFrame> inspect(Tree t, Parser parser) {
List<String> ruleNames = parser != null ? Arrays.asList(parser.getRuleNames()) : null;
return inspect(t, ruleNames);
}
/** Save this tree in a postscript file */
public static void save(Tree t, Parser parser, String fileName)
throws IOException, PrintException
{
List<String> ruleNames = parser != null ? Arrays.asList(parser.getRuleNames()) : null;
save(t, ruleNames, fileName);
}
/** Save this tree in a postscript file using a particular font name and size */
public static void save(Tree t, Parser parser, String fileName,
String fontName, int fontSize)
throws IOException
{
List<String> ruleNames = parser != null ? Arrays.asList(parser.getRuleNames()) : null;
save(t, ruleNames, fileName, fontName, fontSize);
}
/** Save this tree in a postscript file */
public static void save(Tree t, List<String> ruleNames, String fileName)
throws IOException, PrintException
{
writePS(t, ruleNames, fileName);
}
/** Save this tree in a postscript file using a particular font name and size */
public static void save(Tree t,
List<String> ruleNames, String fileName,
String fontName, int fontSize)
throws IOException
{
writePS(t, ruleNames, fileName, fontName, fontSize);
}
public static String getPS(Tree t, List<String> ruleNames,
String fontName, int fontSize)
{
TreePostScriptGenerator psgen =
new TreePostScriptGenerator(ruleNames, t, fontName, fontSize);
return psgen.getPS();
}
public static String getPS(Tree t, List<String> ruleNames) {
return getPS(t, ruleNames, "Helvetica", 11);
}
public static void writePS(Tree t, List<String> ruleNames,
String fileName,
String fontName, int fontSize)
throws IOException
{
String ps = getPS(t, ruleNames, fontName, fontSize);
FileWriter f = new FileWriter(fileName);
BufferedWriter bw = new BufferedWriter(f);
try {
bw.write(ps);
}
finally {
bw.close();
}
}
public static void writePS(Tree t, List<String> ruleNames, String fileName)
throws IOException
{
writePS(t, ruleNames, fileName, "Helvetica", 11);
}
/** Print out a whole tree in LISP form. Arg nodeTextProvider is used on the
* node payloads to get the text for the nodes.
*
* @since 4.5.1
*/
public static String toStringTree(Tree t, TreeTextProvider nodeTextProvider) {
if ( t==null ) return "null";
String s = Utils.escapeWhitespace(nodeTextProvider.getText(t), false);
if ( t.getChildCount()==0 ) return s;
StringBuilder buf = new StringBuilder();
buf.append("(");
s = Utils.escapeWhitespace(nodeTextProvider.getText(t), false);
buf.append(s);
buf.append(' ');
for (int i = 0; i<t.getChildCount(); i++) {
if ( i>0 ) buf.append(' ');
buf.append(toStringTree(t.getChild(i), nodeTextProvider));
}
buf.append(")");
return buf.toString();
}
private Trees() {
}
}
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