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PlantUML is a component that allows to quickly write diagrams from text.
// 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.ebnf;
import java.util.ArrayDeque;
import java.util.Deque;
import net.sourceforge.plantuml.klimt.color.HColor;
import net.sourceforge.plantuml.klimt.color.HColorSet;
import net.sourceforge.plantuml.klimt.creole.Display;
import net.sourceforge.plantuml.klimt.font.FontConfiguration;
import net.sourceforge.plantuml.klimt.geom.HorizontalAlignment;
import net.sourceforge.plantuml.klimt.shape.TextBlock;
import net.sourceforge.plantuml.style.ISkinParam;
import net.sourceforge.plantuml.style.ISkinSimple;
import net.sourceforge.plantuml.style.PName;
import net.sourceforge.plantuml.style.Style;
public class EbnfEngine {
private final Deque stack = new ArrayDeque<>();
private final FontConfiguration fontConfiguration;
private final Style style;
private final HColorSet colorSet;
private final ISkinParam skinParam;
private final HColor lineColor;
public EbnfEngine(ISkinParam skinParam) {
this.skinParam = skinParam;
this.style = ETile.getStyleSignature().getMergedStyle(skinParam.getCurrentStyleBuilder());
this.fontConfiguration = style.getFontConfiguration(skinParam.getIHtmlColorSet());
this.colorSet = skinParam.getIHtmlColorSet();
this.lineColor = style.value(PName.LineColor).asColor(skinParam.getIHtmlColorSet());
}
public void push(Token element) {
stack.addFirst(
new ETileBox(element.getData(), element.getSymbol(), fontConfiguration, style, colorSet, skinParam));
}
public void optional() {
final ETile arg1 = stack.removeFirst();
stack.addFirst(new ETileOptional(arg1, skinParam));
}
public void repetitionZeroOrMore(boolean isCompact) {
final ETile arg1 = stack.removeFirst();
if (isCompact)
stack.addFirst(new ETileZeroOrMore(arg1));
else
stack.addFirst(new ETileOptional(new ETileOneOrMore(arg1), skinParam));
}
public void repetitionOneOrMore() {
final ETile arg1 = stack.removeFirst();
stack.addFirst(new ETileOneOrMore(arg1));
}
public void repetitionSymbol() {
final ETile arg1 = stack.removeFirst();
final String arg2 = stack.removeFirst().getRepetitionLabel() + "\u00D7";
stack.addFirst(new ETileOneOrMore(arg1, arg2, fontConfiguration.bigger(-2), skinParam));
}
public void alternation() {
final ETile arg1 = stack.removeFirst();
final ETile arg2 = stack.removeFirst();
if (arg1 instanceof ETileAlternation) {
arg1.push(arg2);
stack.addFirst(arg1);
} else if (arg2 instanceof ETileAlternation) {
arg2.push(arg1);
stack.addFirst(arg2);
} else {
final ETile concat = new ETileAlternation();
concat.push(arg1);
concat.push(arg2);
stack.addFirst(concat);
}
}
public void concatenation() {
final ETile arg1 = stack.removeFirst();
final ETile arg2 = stack.removeFirst();
if (arg1 instanceof ETileConcatenation) {
arg1.push(arg2);
stack.addFirst(arg1);
} else if (arg2 instanceof ETileConcatenation) {
arg2.push(arg1);
stack.addFirst(arg2);
} else {
final ETile concat = new ETileConcatenation();
concat.push(arg1);
concat.push(arg2);
stack.addFirst(concat);
}
}
public TextBlock getTextBlock() {
if (stack.size() != 1)
return syntaxError(fontConfiguration, skinParam);
return new ETileWithCircles(stack.peekFirst(), lineColor);
}
public static TextBlock syntaxError(FontConfiguration fontConfiguration, ISkinSimple spriteContainer) {
final Display msg = Display.create("Syntax error!");
return msg.create(fontConfiguration, HorizontalAlignment.LEFT, spriteContainer);
}
public void commentBelow(String comment) {
final ETile arg1 = stack.peekFirst();
if (arg1 == null)
throw new IllegalStateException();
arg1.addCommentBelow(comment);
}
public void commentAbove(String comment) {
final ETile arg1 = stack.peekFirst();
if (arg1 == null)
throw new IllegalStateException();
arg1.addCommentAbove(comment);
}
}