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PlantUML is a component that allows to quickly write diagrams from text.
// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
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package net.sourceforge.plantuml.sequencediagram.graphic;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import net.sourceforge.plantuml.klimt.font.StringBounder;
public class ConstraintSet {
private final ParticipantBoxSimple firstBorder;
private final ParticipantBoxSimple lastborder;
final private List participantList = new ArrayList<>();
final private Map, Constraint> constraints = new HashMap, Constraint>();
public ConstraintSet(Collection all, double freeX) {
this.participantList.add(firstBorder = new ParticipantBoxSimple(0, "LEFT"));
this.participantList.addAll(all);
this.participantList.add(lastborder = new ParticipantBoxSimple(freeX, "RIGHT"));
}
@Override
public String toString() {
return constraints.values().toString();
}
public double getMaxX() {
return lastborder.getCenterX(null);
}
public Constraint getConstraint(Pushable p1, Pushable p2) {
if (p1 == null || p2 == null || p1 == p2)
throw new IllegalArgumentException();
final int i1 = participantList.indexOf(p1);
final int i2 = participantList.indexOf(p2);
if (i1 == -1 || i2 == -1)
throw new IllegalArgumentException();
if (i1 > i2)
return getConstraint(p2, p1);
final List key = Arrays.asList(p1, p2);
Constraint result = constraints.get(key);
if (result == null) {
result = new Constraint(p1, p2);
constraints.put(key, result);
}
return result;
}
public Constraint getConstraintAfter(Pushable p1) {
return getConstraint(Objects.requireNonNull(p1), getNext(p1));
}
public Constraint getConstraintBefore(Pushable p1) {
return getConstraint(Objects.requireNonNull(p1), getPrevious(p1));
}
public Pushable getPrevious(Pushable p) {
return getOtherParticipant(p, -1);
}
public Pushable getNext(Pushable p) {
return getOtherParticipant(p, 1);
}
private Pushable getOtherParticipant(Pushable p, int delta) {
final int i = participantList.indexOf(p);
if (i == -1)
throw new IllegalArgumentException();
return participantList.get(i + delta);
}
public void takeConstraintIntoAccount(StringBounder stringBounder) {
for (int dist = 1; dist < participantList.size(); dist++)
pushEverybody(stringBounder, dist);
}
private void pushEverybody(StringBounder stringBounder, int dist) {
for (int i = 0; i < participantList.size() - dist; i++) {
final Pushable p1 = participantList.get(i);
final Pushable p2 = participantList.get(i + dist);
final Constraint c = getConstraint(p1, p2);
ensureSpaceAfter(stringBounder, p1, p2, c.getValue());
}
}
public void pushToLeftParticipantBox(double deltaX, Pushable firstToChange, boolean including) {
if (deltaX <= 0)
throw new IllegalArgumentException();
Objects.requireNonNull(firstToChange);
// freeX += deltaX;
boolean founded = false;
for (Pushable box : participantList) {
if (box.equals(firstToChange)) {
founded = true;
if (including == false)
continue;
}
if (founded)
box.pushToLeft(deltaX);
}
}
public void pushToLeft(double delta) {
pushToLeftParticipantBox(delta, firstBorder, true);
}
private void ensureSpaceAfter(StringBounder stringBounder, Pushable p1, Pushable p2, double space) {
if (p1.equals(p2))
throw new IllegalArgumentException();
if (p1.getCenterX(stringBounder) > p2.getCenterX(stringBounder)) {
ensureSpaceAfter(stringBounder, p2, p1, space);
return;
}
assert p1.getCenterX(stringBounder) < p2.getCenterX(stringBounder);
final double existingSpace = p2.getCenterX(stringBounder) - p1.getCenterX(stringBounder);
if (existingSpace < space)
pushToLeftParticipantBox(space - existingSpace, p2, true);
}
public final Pushable getFirstBorder() {
return firstBorder;
}
public final Pushable getLastborder() {
return lastborder;
}
}