Java String Format formatTreeLines(String tree)

Description

format Tree Lines

License

Open Source License

Declaration

public static String formatTreeLines(String tree) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.util.ArrayList;
import java.util.List;

public class Main {
    private static final String SPAN_INS = "<span class=\"line_ins\">";
    private static final String SPAN_DEL = "<span class=\"line_del\">";
    private static final String SPAN_CLOSE = "</span>";
    private static final String LINE_SEPARATOR = System.getProperty("line.separator");

    public static String formatTreeLines(String tree) {
        if (tree == null || tree.equals(""))
            return tree;

        StringBuilder reconstructedTree = new StringBuilder();
        boolean isOpen = false;
        for (String s : tree.split(LINE_SEPARATOR)) {

            List<Integer> insStartIndexes = getIndexesOf(s, "<ins>");
            List<Integer> insEndIndexes = getIndexesOf(s, "</ins>");
            List<Integer> delStartIndexes = getIndexesOf(s, "<del>");
            List<Integer> delEndIndexes = getIndexesOf(s, "</del");
            int closingTags = insEndIndexes.size() + delEndIndexes.size();
            int startTags = insStartIndexes.size() + delStartIndexes.size();

            if (insStartIndexes.size() > 0 && delStartIndexes.size() > 0) {

                if (isOpen) {
                    if (closingTags > startTags) {
                        isOpen = false;//from   w w w . j  av a 2 s. c  o m
                        s += SPAN_CLOSE;
                    }
                } else {
                    if (insStartIndexes.get(0) > delStartIndexes.get(0))
                        s = SPAN_DEL + s;
                    else
                        s = SPAN_INS + s;

                    if (closingTags == startTags)
                        s += SPAN_CLOSE;
                    else
                        isOpen = true;
                }
            } else if (insStartIndexes.size() > 0 && delStartIndexes.size() == 0) {

                if (isOpen) {
                    if (closingTags > startTags) {
                        isOpen = false;
                        s += SPAN_CLOSE;
                    }
                } else {
                    s = SPAN_INS + s;
                    if (closingTags == startTags)
                        s += SPAN_CLOSE;
                    else
                        isOpen = true;
                }

            } else if (insStartIndexes.size() == 0 && delStartIndexes.size() > 0) {

                if (isOpen) {
                    if (closingTags > startTags) {
                        isOpen = false;
                        s += SPAN_CLOSE;
                    }
                } else {
                    s = SPAN_DEL + s;
                    if (closingTags == startTags)
                        s += SPAN_CLOSE;
                    else
                        isOpen = true;
                }
            } else if (closingTags > 0) {
                s += SPAN_CLOSE;
                isOpen = false;
            }

            reconstructedTree.append(s);
            reconstructedTree.append(LINE_SEPARATOR);
        }

        return reconstructedTree.toString().substring(0, reconstructedTree.length() - 1);
    }

    public static List<Integer> getIndexesOf(String word, String value) {
        List<Integer> indexes = new ArrayList<Integer>();
        for (int index = word.indexOf(value); index != -1; index = word.indexOf(value, index + 1)) {
            indexes.add(index);
        }
        return indexes;
    }
}

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