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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 General Public License V2.
 *
 * THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC
 * LICENSE ("AGREEMENT"). [GNU General Public License V2]
 *
 * ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES
 * RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
 *
 * You may obtain a copy of the License at
 *
 * https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * 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 GPL v2 license.
 *
 * The generated images can then be used without any reference to the GPL v2 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.klimt.creole;

import net.sourceforge.plantuml.klimt.creole.atom.Atom;
import net.sourceforge.plantuml.klimt.creole.legacy.AtomText;
import net.sourceforge.plantuml.klimt.font.StringBounder;

public class Neutron {

	private final String data;
	private final NeutronType type;
	private final Atom asAtom;

	private Neutron(String data, NeutronType type, Atom asAtom) {
		this.data = data;
		this.type = type;
		this.asAtom = asAtom;
	}

	public static Neutron create(Atom atom) {
		if (atom instanceof AtomText) {
			final String text = ((AtomText) atom).getText();
			return new Neutron(text, getNeutronTypeFromChar(text.charAt(0)), atom);
		}
		return new Neutron(null, NeutronType.OTHER, atom);
	}

	public static Neutron zwspSeparator() {
		return new Neutron(null, NeutronType.ZWSP_SEPARATOR, null);
	}

	@Override
	public String toString() {
		if (type == NeutronType.ZWSP_SEPARATOR)
			return "ZWSP";
		return type + "(" + data + ")";
	}

	public Atom asAtom() {
		return asAtom;
	}

	public NeutronType getType() {
		return type;
	}

	public static boolean isSeparator(char ch) {
		return Character.isWhitespace(ch);
	}

	private static boolean isSentenceBoundaryUnused(char ch) {
		return ch == '.' || ch == ',';

	}

	public static boolean isChineseSentenceBoundary(char ch) {
		return ch == '\uFF01' // U+FF01 FULLWIDTH EXCLAMATION MARK (!)
//				|| ch == '\uFF08' // U+FF08 FULLWIDTH LEFT PARENTHESIS
//				|| ch == '\uFF09' // U+FF09 FULLWIDTH RIGHT PARENTHESIS
				|| ch == '\uFF0C' // U+FF0C FULLWIDTH COMMA
				|| ch == '\uFF1A' // U+FF1A FULLWIDTH COLON (:)
				|| ch == '\uFF1B' // U+FF1B FULLWIDTH SEMICOLON (;)
				|| ch == '\uFF1F' // U+FF1F FULLWIDTH QUESTION MARK (?)
				|| ch == '\u3002'; // U+3002 IDEOGRAPHIC FULL STOP (.)
	}

	public double getWidth(StringBounder stringBounder) {
		if (type == NeutronType.ZWSP_SEPARATOR)
			return 0;

		return asAtom.calculateDimension(stringBounder).getWidth();
	}

	public static NeutronType getNeutronTypeFromChar(char ch) {
		if (isSeparator(ch))
			return NeutronType.SPACE;
		return NeutronType.TEXT;
	}

}