mirror of https://github.com/octoleo/plantuml.git
265 lines
8.9 KiB
Java
265 lines
8.9 KiB
Java
/* ========================================================================
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* PlantUML : a free UML diagram generator
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* ========================================================================
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*
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* (C) Copyright 2009-2020, Arnaud Roques
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*
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* Project Info: http://plantuml.com
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*
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* If you like this project or if you find it useful, you can support us at:
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*
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* http://plantuml.com/patreon (only 1$ per month!)
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* http://plantuml.com/paypal
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*
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* This file is part of PlantUML.
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*
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* PlantUML is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* PlantUML distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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* License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*
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*
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* Original Author: Arnaud Roques
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*
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*
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*/
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package net.sourceforge.plantuml.ebnf;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.List;
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import net.sourceforge.plantuml.ISkinParam;
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import net.sourceforge.plantuml.activitydiagram3.ftile.vcompact.FloatingNote;
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import net.sourceforge.plantuml.cucadiagram.Display;
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import net.sourceforge.plantuml.graphic.FontConfiguration;
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import net.sourceforge.plantuml.graphic.HorizontalAlignment;
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import net.sourceforge.plantuml.graphic.TextBlock;
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import net.sourceforge.plantuml.graphic.TextBlockUtils;
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import net.sourceforge.plantuml.style.PName;
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import net.sourceforge.plantuml.style.SName;
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import net.sourceforge.plantuml.style.Style;
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import net.sourceforge.plantuml.ugraphic.color.HColor;
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import net.sourceforge.plantuml.utils.CharInspector;
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public class EbnfExpression implements TextBlockable {
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private final List<Token> tokens = new ArrayList<>();
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private final boolean isCompact;
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private final String commentAbove;
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private final String commentBelow;
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public static EbnfExpression create(CharInspector it, boolean isCompact, String commentAbove, String commentBelow) {
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return new EbnfExpression(it, isCompact, commentAbove, commentBelow);
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}
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private EbnfExpression(CharInspector it, boolean isCompact, String commentAbove, String commentBelow) {
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this.isCompact = isCompact;
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this.commentAbove = commentAbove;
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this.commentBelow = commentBelow;
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while (true) {
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final char ch = it.peek(0);
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if (Character.isWhitespace(ch)) {
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} else if (isLetterOrDigit(ch)) {
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final String litteral = readLitteral(it);
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tokens.add(new Token(Symbol.LITTERAL, litteral));
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continue;
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} else if (ch == '*') {
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tokens.add(new Token(Symbol.REPETITION_SYMBOL, null));
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} else if (ch == '(' && it.peek(1) == '*') {
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final String comment = readComment(it);
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if (comment.trim().length() > 0)
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tokens.add(new Token(Symbol.COMMENT_TOKEN, comment));
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continue;
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} else if (ch == ',') {
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tokens.add(new Token(Symbol.CONCATENATION, null));
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} else if (ch == '|') {
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tokens.add(new Token(Symbol.ALTERNATION, null));
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} else if (ch == '=') {
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tokens.add(new Token(Symbol.DEFINITION, null));
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} else if (ch == '(') {
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tokens.add(new Token(Symbol.GROUPING_OPEN, null));
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} else if (ch == ')') {
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tokens.add(new Token(Symbol.GROUPING_CLOSE, null));
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} else if (ch == '[') {
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tokens.add(new Token(Symbol.OPTIONAL_OPEN, null));
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} else if (ch == ']') {
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tokens.add(new Token(Symbol.OPTIONAL_CLOSE, null));
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} else if (ch == '{') {
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tokens.add(new Token(Symbol.REPETITION_OPEN, null));
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} else if (ch == '}' && it.peek(1) == '-') {
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tokens.add(new Token(Symbol.REPETITION_MINUS_CLOSE, null));
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it.jump();
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} else if (ch == '}') {
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tokens.add(new Token(Symbol.REPETITION_CLOSE, null));
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} else if (ch == ';' || ch == 0) {
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// it.next();
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break;
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} else if (ch == '\"') {
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final String litteral = readString(it);
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tokens.add(new Token(Symbol.TERMINAL_STRING1, protect(litteral)));
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} else if (ch == '\'') {
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final String litteral = readString(it);
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tokens.add(new Token(Symbol.TERMINAL_STRING2, protect(litteral)));
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} else if (ch == '?') {
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final String litteral = readString(it);
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tokens.add(new Token(Symbol.SPECIAL_SEQUENCE, protect(litteral)));
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} else {
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tokens.clear();
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return;
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}
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it.jump();
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continue;
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}
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}
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private static String protect(final String litteral) {
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return litteral.length() == 0 ? " " : litteral;
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}
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public TextBlock getUDrawable(ISkinParam skinParam) {
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final Style style = ETile.getStyleSignature().getMergedStyle(skinParam.getCurrentStyleBuilder());
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final FontConfiguration fc = style.getFontConfiguration(skinParam.getIHtmlColorSet());
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if (tokens.size() == 0)
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return EbnfEngine.syntaxError(fc, skinParam);
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try {
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final Iterator<Token> iterator = tokens.iterator();
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final Token name = iterator.next();
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final Token definition = iterator.next();
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if (definition.getSymbol() != Symbol.DEFINITION)
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return EbnfEngine.syntaxError(fc, skinParam);
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final TextBlock main;
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if (iterator.hasNext()) {
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final List<Token> full = new ShuntingYard(iterator).getOuputQueue();
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if (full.size() == 0)
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return EbnfEngine.syntaxError(fc, skinParam);
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main = getMainDrawing(skinParam, full.iterator());
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} else {
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final HColor lineColor = style.value(PName.LineColor).asColor(skinParam.getIHtmlColorSet());
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main = new ETileWithCircles(new ETileEmpty(), lineColor);
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}
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TextBlock titleBox = new TitleBox(name.getData(), fc);
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if (commentAbove != null)
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titleBox = TextBlockUtils.mergeTB(getNoteAbove(skinParam), titleBox, HorizontalAlignment.CENTER);
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if (commentBelow != null)
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titleBox = TextBlockUtils.mergeTB(titleBox, getNoteBelow(skinParam), HorizontalAlignment.CENTER);
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return TextBlockUtils.mergeTB(titleBox, TextBlockUtils.withMargin(main, 0, 0, 10, 15),
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HorizontalAlignment.LEFT);
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} catch (Exception e) {
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e.printStackTrace();
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return EbnfEngine.syntaxError(fc, skinParam);
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}
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}
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private TextBlock getNoteAbove(ISkinParam skinParam) {
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if (commentAbove == null)
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return null;
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final FloatingNote note = FloatingNote.create(Display.getWithNewlines(commentAbove), skinParam, SName.ebnf);
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return note;
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}
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private TextBlock getNoteBelow(ISkinParam skinParam) {
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if (commentBelow == null)
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return null;
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final FloatingNote note = FloatingNote.create(Display.getWithNewlines(commentBelow), skinParam, SName.ebnf);
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return note;
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}
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private TextBlock getMainDrawing(ISkinParam skinParam, Iterator<Token> it) {
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final EbnfEngine engine = new EbnfEngine(skinParam);
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while (it.hasNext()) {
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final Token element = it.next();
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if (element.getSymbol() == Symbol.TERMINAL_STRING1 || element.getSymbol() == Symbol.TERMINAL_STRING2
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|| element.getSymbol() == Symbol.LITTERAL || element.getSymbol() == Symbol.SPECIAL_SEQUENCE)
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engine.push(element);
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else if (element.getSymbol() == Symbol.COMMENT_ABOVE)
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engine.commentAbove(element.getData());
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else if (element.getSymbol() == Symbol.COMMENT_BELOW)
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engine.commentBelow(element.getData());
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else if (element.getSymbol() == Symbol.ALTERNATION)
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engine.alternation();
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else if (element.getSymbol() == Symbol.CONCATENATION)
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engine.concatenation();
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else if (element.getSymbol() == Symbol.OPTIONAL)
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engine.optional();
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else if (element.getSymbol() == Symbol.REPETITION_ZERO_OR_MORE)
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engine.repetitionZeroOrMore(isCompact);
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else if (element.getSymbol() == Symbol.REPETITION_ONE_OR_MORE)
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engine.repetitionOneOrMore();
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else if (element.getSymbol() == Symbol.REPETITION_SYMBOL)
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engine.repetitionSymbol();
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else
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throw new UnsupportedOperationException(element.toString());
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}
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return engine.getTextBlock();
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}
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private String readString(CharInspector it) {
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final char separator = it.peek(0);
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it.jump();
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final StringBuilder sb = new StringBuilder();
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while (true) {
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final char ch = it.peek(0);
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if (ch == separator)
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return sb.toString();
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sb.append(ch);
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it.jump();
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}
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}
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private String readLitteral(CharInspector it) {
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final StringBuilder sb = new StringBuilder();
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while (true) {
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final char ch = it.peek(0);
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if (isLetterOrDigit(ch) == false)
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return sb.toString();
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sb.append(ch);
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it.jump();
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}
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}
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private String readComment(CharInspector it) {
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final StringBuilder sb = new StringBuilder();
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it.jump();
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it.jump();
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while (true) {
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final char ch = it.peek(0);
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if (ch == '\0')
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return sb.toString();
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if (ch == '*' && it.peek(1) == ')') {
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it.jump();
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it.jump();
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return sb.toString();
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}
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sb.append(ch);
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it.jump();
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}
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}
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private boolean isLetterOrDigit(char ch) {
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return ch == '-' || ch == '_' || Character.isLetterOrDigit(ch);
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}
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public boolean isEmpty() {
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return tokens.size() == 0;
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}
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}
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