InfiniteString.java

/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2024, Arnaud Roques
 *
 * Project Info:  https://plantuml.com
 * 
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 * 
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 * 
 * This file is part of PlantUML.
 *
 * PlantUML 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.
 *
 * PlantUML 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 this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 *
 * Original Author:  Arnaud Roques
 *
 *
 */
package net.sourceforge.plantuml.asciiverse;

public class InfiniteString {

	private final StringBuilder sb = new StringBuilder();

	private void ensureLength(int length) {
		while (sb.length() < length)
			sb.append(' ');

	}

	public void setCharAt(int position, char ch) {
		ensureLength(position + 1);
		sb.setCharAt(position, ch);
	}

	public void setStringAt(int position, String s) {
		final int endPosition = position + s.length();
		ensureLength(endPosition);

		for (int i = 0; i < s.length(); i++)
			sb.setCharAt(position + i, s.charAt(i));

	}

	public char getCharAt(int position) {
		if (position >= sb.length())
			return ' ';

		return sb.charAt(position);
	}

	@Override
	public String toString() {
		return sb.toString();
	}
}