mirror of https://github.com/octoleo/plantuml.git
122 lines
3.8 KiB
Java
122 lines
3.8 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 2009-2024, Arnaud Roques
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*
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* Project Info: https://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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* https://plantuml.com/patreon (only 1$ per month!)
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* https://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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package net.sourceforge.plantuml.tim.iterator;
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import java.util.List;
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import net.sourceforge.plantuml.text.StringLocated;
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import net.sourceforge.plantuml.text.TLineType;
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import net.sourceforge.plantuml.tim.EaterExceptionLocated;
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import net.sourceforge.plantuml.tim.EaterWhile;
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import net.sourceforge.plantuml.tim.ExecutionContextWhile;
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import net.sourceforge.plantuml.tim.TContext;
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import net.sourceforge.plantuml.tim.TMemory;
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import net.sourceforge.plantuml.tim.expression.TValue;
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import net.sourceforge.plantuml.tim.expression.TokenStack;
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public class CodeIteratorWhile extends AbstractCodeIterator {
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private final TContext context;
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private final TMemory memory;
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private final List<StringLocated> logs;
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public CodeIteratorWhile(CodeIterator source, TContext context, TMemory memory, List<StringLocated> logs) {
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super(source);
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this.context = context;
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this.memory = memory;
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this.logs = logs;
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}
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public StringLocated peek() throws EaterExceptionLocated {
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int level = 0;
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while (true) {
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final StringLocated result = source.peek();
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if (result == null)
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return null;
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final ExecutionContextWhile currentWhile = memory.peekWhile();
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if (currentWhile != null && currentWhile.isSkipMe()) {
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if (result.getType() == TLineType.WHILE) {
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level++;
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} else if (result.getType() == TLineType.ENDWHILE) {
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level--;
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if (level == -1) {
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memory.pollWhile();
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level = 0;
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}
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}
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next();
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continue;
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}
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if (result.getType() == TLineType.WHILE) {
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logs.add(result);
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executeWhile(memory, result.getTrimmed());
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next();
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continue;
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} else if (result.getType() == TLineType.ENDWHILE) {
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logs.add(result);
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if (currentWhile == null)
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throw EaterExceptionLocated.located("No while related to this endwhile", result);
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final TValue value = currentWhile.conditionValue(result, context, memory);
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if (value.toBoolean())
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source.jumpToCodePosition(currentWhile.getStartWhile(), result);
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else
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memory.pollWhile();
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next();
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continue;
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}
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return result;
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}
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}
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private void executeWhile(TMemory memory, StringLocated s) throws EaterExceptionLocated {
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final EaterWhile condition = new EaterWhile(s);
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condition.analyze(context, memory);
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final TokenStack whileExpression = condition.getWhileExpression();
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final ExecutionContextWhile theWhile = ExecutionContextWhile.fromValue(whileExpression,
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source.getCodePosition());
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final TValue value = theWhile.conditionValue(s, context, memory);
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if (value.toBoolean() == false)
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theWhile.skipMe();
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memory.addWhile(theWhile);
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}
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}
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