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MPL is a language that makes it easier to write applications for Minecraft 1.9 or higher. The final result of compiling an MPL application are command blocks that can be imported into your world in various ways. MPL comes with it's own editor that supports syntax- and error-highlighting and has a built in compiler.

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/*
 * Minecraft Programming Language (MPL): A language for easy development of command block
 * applications including an IDE.
 *
 * © Copyright (C) 2016 Adrodoc55
 *
 * This file is part of MPL.
 *
 * MPL is free software: you can redistribute it and/or modify it under the terms of the GNU General
 * Public License as published by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * MPL is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
 * Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with MPL. If not, see
 * .
 *
 *
 *
 * Minecraft Programming Language (MPL): Eine Sprache für die einfache Entwicklung von Commandoblock
 * Anwendungen, inklusive einer IDE.
 *
 * © Copyright (C) 2016 Adrodoc55
 *
 * Diese Datei ist Teil von MPL.
 *
 * MPL ist freie Software: Sie können diese unter den Bedingungen der GNU General Public License,
 * wie von der Free Software Foundation, Version 3 der Lizenz oder (nach Ihrer Wahl) jeder späteren
 * veröffentlichten Version, weiterverbreiten und/oder modifizieren.
 *
 * MPL wird in der Hoffnung, dass es nützlich sein wird, aber OHNE JEDE GEWÄHRLEISTUNG,
 * bereitgestellt; sogar ohne die implizite Gewährleistung der MARKTFÄHIGKEIT oder EIGNUNG FÜR EINEN
 * BESTIMMTEN ZWECK. Siehe die GNU General Public License für weitere Details.
 *
 * Sie sollten eine Kopie der GNU General Public License zusammen mit MPL erhalten haben. Wenn
 * nicht, siehe .
 */
package de.adrodoc55.commons;

import java.util.Arrays;

/**
 * @author Adrodoc55
 */
public class TabToSpaceConverter {
  protected TabToSpaceConverter() throws Exception {
    throw new Exception("Utils Classes cannot be instantiated!");
  }

  /**
   * Converts all tabs to spaces, so that each tab ends after a multiple of 4 characters after the
   * last newline.
   *
   * @param text the string containing tabs
   * @return a String without tabs
   */
  public static String convertTabsToSpaces(String text) {
    return convertTabsToSpaces(0, 4, text);
  }

  /**
   * Converts all tabs to spaces, so that each tab ends after a multiple of {@code tabWidth}
   * characters after the last newline.
   *
   * @param tabWidth the maximum number of spaces to use for a tab
   * @param text the string containing tabs
   * @return a String without tabs
   */
  public static String convertTabsToSpaces(int tabWidth, String text) {
    return convertTabsToSpaces(0, tabWidth, text);
  }

  /**
   * Converts all tabs to spaces, so that each tab ends after a multiple of {@code tabWidth}
   * characters after the last newline. {@code offset} can be specified, if {@code text} is part of
   * a bigger {@code String} and does not immediately follow a newline.
   *
   * @param offset the number of characters between the last newline and the start of text
   * @param tabWidth the maximum number of spaces to use for a tab
   * @param text the string containing tabs
   * @return a String without tabs
   */
  public static String convertTabsToSpaces(int offset, int tabWidth, String text) {
    StringBuilder sb = new StringBuilder(text.length());
    int afterLastNlIndex = -offset;
    int afterLastTabIndex = 0;
    char[] textArray = text.toCharArray();
    for (int i = 0; i < textArray.length; i++) {
      if (textArray[i] == '\r' || textArray[i] == '\n') {
        afterLastNlIndex = i + 1;
      } else if (textArray[i] == '\t') {
        sb.append(Arrays.copyOfRange(textArray, afterLastTabIndex, i));
        int spaceCount = tabWidth - ((i - afterLastNlIndex) % tabWidth);
        for (int s = spaceCount; s > 0; s--) {
          sb.append(' ');
        }
        afterLastTabIndex = i + 1;
        // afterLastNlIndex muss korrigiert werden, da (spaceCount - 1) spaces nach der letzten
        // newline eingefügt wurden. Minus 1, da ein tab bereits da war, und ersetzt wird.
        afterLastNlIndex -= spaceCount - 1;
      }
    }
    sb.append(Arrays.copyOfRange(textArray, afterLastTabIndex, textArray.length));
    return sb.toString();
  }

}