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130 lines
3.8 KiB
Java
130 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 2009-2023, 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.sequencediagram.graphic;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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class FrontierStackImpl implements FrontierStack {
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class Stack {
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final private FrontierComplex current;
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final private FrontierComplex envelop;
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Stack(FrontierComplex current) {
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this(current, null);
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}
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private Stack(FrontierComplex current, FrontierComplex envelop) {
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this.current = current;
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this.envelop = envelop;
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}
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Stack addEnvelop(FrontierComplex env) {
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if (this.envelop == null) {
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return new Stack(this.current, env);
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}
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return new Stack(this.current, this.envelop.mergeMax(env));
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}
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}
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final private List<Stack> all;
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public FrontierStackImpl(double freeY, int rangeEnd) {
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final Stack s = new Stack(FrontierComplex.create(freeY, rangeEnd));
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all = Collections.singletonList(s);
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}
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private FrontierStackImpl(List<Stack> all) {
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this.all = Collections.unmodifiableList(all);
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}
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private FrontierComplex getLast() {
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return all.get(all.size() - 1).current;
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}
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public double getFreeY(ParticipantRange range) {
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return getLast().getFreeY(range);
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}
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public FrontierStackImpl add(double delta, ParticipantRange range) {
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final List<Stack> result = new ArrayList<>(all);
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final Stack s = new Stack(getLast().add(delta, range));
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result.set(result.size() - 1, s);
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return new FrontierStackImpl(result);
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}
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public FrontierStack openBar() {
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final List<Stack> result = new ArrayList<>(all);
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final Stack s = new Stack(getLast().copy());
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result.add(s);
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return new FrontierStackImpl(result);
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}
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public FrontierStack restore() {
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final List<Stack> result = new ArrayList<>(all);
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final Stack openedBar = result.get(result.size() - 2);
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final Stack lastStack = result.get(result.size() - 1);
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result.set(result.size() - 2, openedBar.addEnvelop(lastStack.current));
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result.remove(result.size() - 1);
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final Stack s = new Stack(openedBar.current.copy());
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result.add(s);
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return new FrontierStackImpl(result);
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}
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public FrontierStack closeBar() {
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final List<Stack> result = new ArrayList<>(all);
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final Stack openedBar = result.get(result.size() - 2);
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final Stack lastStack = result.get(result.size() - 1);
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final Stack merge = openedBar.addEnvelop(lastStack.current);
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result.set(result.size() - 2, new Stack(merge.envelop));
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result.remove(result.size() - 1);
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return new FrontierStackImpl(result);
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}
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public FrontierStackImpl copy() {
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// return new FrontierStackImpl(all);
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throw new UnsupportedOperationException();
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}
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@Override
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public String toString() {
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return "nb=" + all.size() + " " + getLast().toString();
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}
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}
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