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package org.eclipse.papyrus.uml.diagram.sequence.util;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.gmf.runtime.diagram.core.util.ViewUtil;
import org.eclipse.gmf.runtime.notation.NotationPackage;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.uml2.uml.ExecutionSpecification;
public class LifelineModelChildrenHelper {
/**
* Try to fixed the bug about display ExecutionSpecifications(ES).
*
* At some times, the child ES would be displayed under the parent ES.
*
* Fixed to sort them with bounds in model before creating.
*/
public static List<View> getModelChildren(View lifeline) {
if (lifeline == null) {
return Collections.emptyList();
}
@SuppressWarnings("unchecked")
List<View> children = new ArrayList<View>(lifeline.getVisibleChildren());
List<View> result = sortChildren(children);
return result;
}
private static List<View> sortChildren(List<View> children) {
List<View> result = new ArrayList<>();
List<View> original = new ArrayList<>(children);
for (Iterator<View> iterator = original.iterator(); iterator.hasNext();) {
View view = iterator.next();
EObject elt = ViewUtil.resolveSemanticElement(view);
if (!(elt instanceof ExecutionSpecification)) {
result.add(view);
iterator.remove();
}
}
result.addAll(doSortExecutionSpecifications(original));
return result;
}
private static List<View> doSortExecutionSpecifications(List<View> executionSpecifications) {
if (executionSpecifications.isEmpty()) {
return executionSpecifications;
}
List<View> views = new ArrayList<>(executionSpecifications);
List<View> result = new ArrayList<>(executionSpecifications.size());
int minX = -1;
for (View view : views) {
Rectangle rect = getViewBounds(view);
if (minX == -1 || rect.x < minX) {
minX = rect.x;
}
}
List<View> firstLevelViews = new ArrayList<>();
for (View view : views) {
Rectangle rect = getViewBounds(view);
if (rect.x >= minX - 2 && rect.x <= minX + 2) {
firstLevelViews.add(view);
}
}
List<View> insertViews = doSortVertically(firstLevelViews);
for (View view : insertViews) {
doInsert(view, result, views, new ArrayList<>(insertViews));
}
List<View> remains = new ArrayList<>();
for (View view : views) {
if (!result.contains(view)) {
remains.add(view);
}
}
insertViews = doSortVertically(remains);
for (View view : remains) {
doInsert(view, result, views, new ArrayList<>(insertViews));
}
return result;
}
private static void doInsert(View view, List<View> result, List<View> allViews, List<View> ignoreViews) {
Rectangle r1 = getViewBounds(view);
r1.width = 16;
if (!result.contains(view)) {
result.add(view);
}
ignoreViews.add(view);
List<View> newLevelViews = new ArrayList<>();
for (View v : allViews) {
if (ignoreViews.contains(v)) {
continue;
}
Rectangle r2 = getViewBounds(v);
r2.width = 16;
if (r2.x > r1.x && r2.x < r1.right() && r2.y >= r1.y && r2.y <= r1.bottom()) {
newLevelViews.add(v);
}
}
newLevelViews = doSortVertically(newLevelViews);
ignoreViews.addAll(newLevelViews);
for (View v : newLevelViews) {
doInsert(v, result, allViews, ignoreViews);
}
}
private static List<View> doSortVertically(List<View> views) {
List<View> insertViews = new ArrayList<>();
for (int i = 0; i < views.size(); i++) {
View current = views.get(i);
Rectangle r1 = getViewBounds(current);
int index = insertViews.size();
for (int j = 0; j < insertViews.size(); j++) {
Rectangle r2 = getViewBounds(insertViews.get(j));
if (r1.y < r2.y) {
index = j;
}
}
insertViews.add(index, current);
}
return insertViews;
}
private static Rectangle getViewBounds(View view) {
if (view == null) {
return null;
}
Integer x = getFeatureValue(view, NotationPackage.eINSTANCE.getLocation_X());
Integer y = getFeatureValue(view, NotationPackage.eINSTANCE.getLocation_Y());
Integer width = getFeatureValue(view, NotationPackage.eINSTANCE.getSize_Width());
Integer height = getFeatureValue(view, NotationPackage.eINSTANCE.getSize_Height());
if (x == null && y == null && width == null && height == null) {
return null;
}
return new Rectangle(x == null ? 0 : x.intValue(), y == null ? 0 : y.intValue(), width == null ? -1 : width.intValue(), height == null ? -1 : height.intValue());
}
private static Integer getFeatureValue(View view, EStructuralFeature feature) {
if (view == null || feature == null) {
return null;
}
return (Integer) ViewUtil.getPropertyValue(view, feature, feature.getEContainingClass());
}
}
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