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PlantUML is a component that allows to quickly write diagrams from text.
There is a newer version: 1.2024.8
// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
/* +=======================================================================
 * |
 * |      PlantUML : a free UML diagram generator
 * |
 * +=======================================================================
 *
 * (C) Copyright 2009-2024, Arnaud Roques
 *
 * Project Info:  https://plantuml.com
 *
 * If you like this project or if you find it useful, you can support us at:
 *
 * https://plantuml.com/patreon (only 1$ per month!)
 * https://plantuml.com/liberapay (only 1€ per month!)
 * https://plantuml.com/paypal
 *
 *
 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser 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 Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library.  If not, see .
 *
 * PlantUML can occasionally display sponsored or advertising messages. Those
 * messages are usually generated on welcome or error images and never on
 * functional diagrams.
 * See https://plantuml.com/professional if you want to remove them
 *
 * Images (whatever their format : PNG, SVG, EPS...) generated by running PlantUML
 * are owned by the author of their corresponding sources code (that is, their
 * textual description in PlantUML language). Those images are not covered by
 * this LGPL license.
 *
 * The generated images can then be used without any reference to the LGPL license.
 * It is not even necessary to stipulate that they have been generated with PlantUML,
 * although this will be appreciated by the PlantUML team.
 *
 * There is an exception : if the textual description in PlantUML language is also covered
 * by any license, then the generated images are logically covered
 * by the very same license.
 *
 * This is the IGY distribution (Install GraphViz by Yourself).
 * You have to install GraphViz and to setup the GRAPHVIZ_DOT environment variable
 * (see https://plantuml.com/graphviz-dot )
 *
 * Icons provided by OpenIconic :  https://useiconic.com/open
 * Archimate sprites provided by Archi :  http://www.archimatetool.com
 * Stdlib AWS provided by https://github.com/milo-minderbinder/AWS-PlantUML
 * Stdlib Icons provided https://github.com/tupadr3/plantuml-icon-font-sprites
 * ASCIIMathML (c) Peter Jipsen http://www.chapman.edu/~jipsen
 * ASCIIMathML (c) David Lippman http://www.pierce.ctc.edu/dlippman
 * CafeUndZopfli ported by Eugene Klyuchnikov https://github.com/eustas/CafeUndZopfli
 * Brotli (c) by the Brotli Authors https://github.com/google/brotli
 * Themes (c) by Brett Schwarz https://github.com/bschwarz/puml-themes
 * Twemoji (c) by Twitter at https://twemoji.twitter.com/
 *
 */
package net.sourceforge.plantuml.preproc;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.Reader;

import net.sourceforge.plantuml.text.StringLocated;
import net.sourceforge.plantuml.utils.LineLocation;
import net.sourceforge.plantuml.utils.LineLocationImpl;
import net.sourceforge.plantuml.utils.Log;

public class ReadLineReader implements ReadLine {

	private final BufferedReader br;
	private LineLocationImpl location;
	private final String description;

	private ReadLineReader(Reader reader, String description, LineLocation parent) {
		if (description == null)
			description = "?";

		this.br = new BufferedReader(reader);
		this.location = new LineLocationImpl(description, parent);
		this.description = description;
		Log.info("Reading from " + description);
	}

	@Override
	public String toString() {
		return super.toString() + " " + description;
	}

	private ReadLineReader(Reader reader, String desc) {
		this(reader, desc, null);
	}

	public static ReadLine create(Reader reader, String description) {
		return new ReadLineReader(reader, description, null);
	}

	public static ReadLine create(Reader reader, String description, LineLocation parent) {
		return new ReadLineReader(reader, description, parent);
	}

	public StringLocated readLine() throws IOException {
		String s = br.readLine();
		location = location.oneLineRead();
		if (s == null)
			return null;

		// if (s.length() > LIMIT) {
		// Log.debug("Line truncated from " + s.length() + " to " + LIMIT);
		// s = s.substring(0, LIMIT);
		// }
		if (s.startsWith("\uFEFF"))
			s = s.substring(1);

		s = s.replace('\u2013', '-');
		// s = BackSlash.convertHiddenNewLine(s);
		// s = s.replace('\u00A0', ' ');
		// s = s.replace('\u201c', '\"');
		// s = s.replace('\u201d', '\"');
		// s = s.replace('\u00ab', '\"');
		// s = s.replace('\u00bb', '\"');
		// s = s.replace('\u2018', '\'');
		// s = s.replace('\u2019', '\'');
		// for (int i = 0; i < s.length(); i++) {
		// char c = s.charAt(i);
		// System.err.println("X " + Integer.toHexString((int) c) + " " + c);
		// }
		return new StringLocated(s, location);
	}

	public void close() throws IOException {
		br.close();
	}

}