PrettyPrinter.java

gehe zur Dokumentation dieser Datei

package de.lathanda.eos.vm;
 
import java.util.LinkedList;
 
public class PrettyPrinter {
    private static final String TAB = "    ";
    private LinkedList<Newline> newlines;
    private String source;
 
    public PrettyPrinter(String source) {
        this.source = source;
        newlines = new LinkedList<>();
    }
 
    public String prettyPrint() {
        int index = 0;
        int level = 0;
        String linetext;
        StringBuilder pretty = new StringBuilder();
        for (Newline line : newlines) {
            linetext = source.substring(index, line.position);
            int crs = linetext.replaceAll("\n", "xx").length() - linetext.length();
            linetext = linetext.trim();
            crs -= linetext.replaceAll("\n", "xx").length() - linetext.length();
            index = line.position;
            if (!linetext.isEmpty()) {
                for (int i = level; i-- > 0;) {
                    pretty.append(TAB);
                }
                pretty.append(linetext);
                pretty.append("\n");
                for (int i = 1; i < crs; i++) {
                    pretty.append("\n");
                }
            }
            level = line.level;
        }
        linetext = source.substring(index, source.length()).trim();
        if (!linetext.isEmpty()) {
            for (int i = level; i-- > 0;) {
                pretty.append(TAB);
            }
            pretty.append(linetext);
            pretty.append("\n");
        }
        return pretty.toString();
    }
 
    public void newline(int position, int level) {
        newlines.add(new Newline(position, level));
    }
 
    private class Newline {
        int position;
        int level;
 
        public Newline(int position, int level) {
            this.position = position;
            this.level = level;
        }
 
    }
}