fix: wip on various issues

https://github.com/plantuml/plantuml/issues/1352
https://github.com/plantuml/plantuml/issues/1348

src/net/sourceforge/plantuml/abel/Entity.java

@@ -719,4 +719,32 @@ final public class Entity implements SpecificBackcolorable, Hideable, Removeable
 		return true;
 	}
 
+	public boolean canBePacked() {
+		if (isPacked())
+			return false;
+		if (countChildren() != 1)
+			return false;
+		if (leafs().size() != 0)
+			return false;
+		for (Link link : entityFactory.getLinks())
+			if (link.contains(this))
+				return false;
+
+		final Entity child = groups().iterator().next();
+		if (child.countChildren() == 0)
+			return false;
+
+		return true;
+	}
+
+	private boolean packed;
+
+	public final void setPacked(boolean packed) {
+		this.packed = true;
+	}
+
+	public final boolean isPacked() {
+		return packed;
+	}
+
 }

src/net/sourceforge/plantuml/abel/Link.java

@@ -334,23 +334,19 @@ public class Link extends WithLinkType implements Hideable, Removeable {
 	}
 
 	public boolean contains(Entity entity) {
-		if (isSame(getEntity1(), entity))
+		if (getEntity1() == entity)
 			return true;
-		if (isSame(getEntity2(), entity))
+		if (getEntity2() == entity)
 			return true;
 
 		return false;
 	}
 
-	static private boolean isSame(Entity a, Entity b) {
-		return a == b;
-	}
-
 	public Entity getOther(Entity entity) {
-		if (isSame(getEntity1(), entity))
+		if (getEntity1() == entity)
 			return getEntity2();
 
-		if (isSame(getEntity2(), entity))
+		if (getEntity2() == entity)
 			return getEntity1();
 
 		throw new IllegalArgumentException();

src/net/sourceforge/plantuml/classdiagram/ClassDiagram.java

@@ -45,6 +45,7 @@ import net.sourceforge.plantuml.abel.Link;
 import net.sourceforge.plantuml.command.CommandExecutionResult;
 import net.sourceforge.plantuml.core.ImageData;
 import net.sourceforge.plantuml.core.UmlSource;
+import net.sourceforge.plantuml.klimt.creole.Display;
 import net.sourceforge.plantuml.klimt.shape.TextBlock;
 import net.sourceforge.plantuml.objectdiagram.AbstractClassOrObjectDiagram;
 import net.sourceforge.plantuml.plasma.Quark;
@@ -118,10 +119,37 @@ public class ClassDiagram extends AbstractClassOrObjectDiagram {
 						link2.setLength(1);
 
 		}
+
+		if (getPragma().useIntermediatePackages() == false)
+			packSomePackage();
+
 		this.applySingleStrategy();
 		return super.checkFinalError();
 	}
 
+	private void packSomePackage() {
+		String separator = getNamespaceSeparator();
+		if (separator == null)
+			separator = ".";
+
+		while (true) {
+			boolean changed = false;
+			for (Entity group : this.entityFactory.groups()) {
+				if (group.canBePacked()) {
+					final Entity child = group.groups().iterator().next();
+					final String appended = group.getDisplay().get(0) + separator;
+					final Display newDisplay = child.getDisplay().appendFirstLine(appended);
+					child.setDisplay(newDisplay);
+					group.setPacked(true);
+					changed = true;
+				}
+			}
+			if (changed == false)
+				return;
+		}
+
+	}
+
 	public CommandExecutionResult checkIfPackageHierarchyIfOk(Entity entity) {
 		Quark<Entity> current = entity.getQuark().getParent();
 		while (current.isRoot() == false) {

src/net/sourceforge/plantuml/klimt/creole/Display.java

@@ -416,6 +416,12 @@ public class Display implements Iterable<CharSequence> {
 		return result;
 	}
 
+	public Display appendFirstLine(String appended) {
+		final Display result = new Display(this.showStereotype, this, this.defaultCreoleMode);
+		result.displayData.set(0, appended + result.displayData.get(0));
+		return result;
+	}
+
 	public Display add(CharSequence s) {
 		final Display result = new Display(this.showStereotype, this, this.defaultCreoleMode);
 		result.displayData.add(s);

src/net/sourceforge/plantuml/sdot/CucaDiagramFileMakerSmetana.java

@@ -317,14 +317,18 @@ public class CucaDiagramFileMakerSmetana implements CucaDiagramFileMaker {
 		if (g.getGroupType() == GroupType.CONCURRENT_STATE)
 			return;
 
-		final ClusterHeader clusterHeader = new ClusterHeader((Entity) g, diagram.getSkinParam(), diagram,
+		if (g.isPacked() == false) {
-				stringBounder);
+			final ClusterHeader clusterHeader = new ClusterHeader(g, diagram.getSkinParam(), diagram, stringBounder);
-		dotStringFactory.openCluster(g, clusterHeader);
+			dotStringFactory.openCluster(g, clusterHeader);
+		}
+
 		this.printEntities(g.leafs());
 
 		printAllSubgroups(g);
 
-		dotStringFactory.closeCluster();
+		if (g.isPacked() == false) {
+			dotStringFactory.closeCluster();
+		}
 	}
 
 	private void printEntities(Collection<Entity> entities) {
@@ -361,8 +365,8 @@ public class CucaDiagramFileMakerSmetana implements CucaDiagramFileMaker {
 
 		result = agnode(zz, cluster, new CString("z" + group.getUid()), true);
 		agsafeset(zz, result, new CString("shape"), new CString("box"), new CString(""));
-		agsafeset(zz, result, new CString("width"), new CString("1"), new CString(""));
+		agsafeset(zz, result, new CString("width"), new CString("0.1"), new CString(""));
-		agsafeset(zz, result, new CString("height"), new CString("1"), new CString(""));
+		agsafeset(zz, result, new CString("height"), new CString("0.1"), new CString(""));
 		coreNodes.put(group, result);
 		return result;
 	}
@@ -373,7 +377,6 @@ public class CucaDiagramFileMakerSmetana implements CucaDiagramFileMaker {
 			System.err.println("CANNOT FIND NODE");
 			return;
 		}
-		System.err.println("exportEntity " + leaf);
 		final ST_Agnode_s agnode = agnode(zz, cluster, new CString(node.getUid()), true);
 		agsafeset(zz, agnode, new CString("shape"), new CString("box"), new CString(""));
 		final XDimension2D dim = getDim(node);
@@ -484,9 +487,14 @@ public class CucaDiagramFileMakerSmetana implements CucaDiagramFileMaker {
 	}
 
 	private void exportGroup(Globals zz, ST_Agraph_s graph, Entity group) {
+		if (group.isPacked()) {
+			this.exportEntities(zz, graph, group.leafs());
+			this.exportGroups(zz, graph, group);
+			return;
+		}
 		final Cluster cluster = getBibliotekon().getCluster(group);
 		if (cluster == null) {
-			System.err.println("CucaDiagramFileMakerJDot::exportGroup issue");
+			System.err.println("CucaDiagramFileMakerSmetana::exportGroup issue");
 			return;
 		}
 		JUtils.LOG2("cluster = " + cluster.getClusterId());

src/net/sourceforge/plantuml/skin/Pragma.java

@@ -74,6 +74,10 @@ public class Pragma {
 		return "true".equalsIgnoreCase(s) || "on".equalsIgnoreCase(s);
 	}
 
+	private boolean isFalse(final String s) {
+		return "false".equalsIgnoreCase(s) || "off".equalsIgnoreCase(s);
+	}
+
 	public boolean useVerticalIf() {
 		return isTrue(getValue("useverticalif"));
 	}
@@ -86,4 +90,8 @@ public class Pragma {
 		return isTrue(getValue("kermor"));
 	}
 
+	public boolean useIntermediatePackages() {
+		return !isFalse(getValue("useintermediatepackages"));
+	}
+
 }

src/net/sourceforge/plantuml/svek/ClusterDotString.java

@@ -66,6 +66,10 @@ public class ClusterDotString {
 		this.skinParam = skinParam;
 	}
 
+	private boolean isPacked() {
+		return cluster.getGroup().isPacked();
+	}
+
 	void printInternal(StringBuilder sb, Collection<SvekLine> lines, StringBounder stringBounder, DotMode dotMode,
 			GraphvizVersion graphvizVersion, UmlDiagramType type) {
 		if (cluster.diagram.getPragma().useKermor()) {
@@ -73,6 +77,14 @@ public class ClusterDotString {
 					graphvizVersion, type);
 			return;
 		}
+		final boolean packed = isPacked();
+
+		if (packed) {
+			cluster.printCluster1(sb, lines, stringBounder);
+			final SvekNode added = cluster.printCluster2(sb, lines, stringBounder, dotMode, graphvizVersion, type);
+			return;
+
+		}
 		final boolean thereALinkFromOrToGroup2 = isThereALinkFromOrToGroup(lines);
 		boolean thereALinkFromOrToGroup1 = thereALinkFromOrToGroup2;
 		final boolean useProtectionWhenThereALinkFromOrToGroup = graphvizVersion
@@ -154,6 +166,8 @@ public class ClusterDotString {
 			SvekUtils.println(sb);
 		}
 		SvekUtils.println(sb);
+
+		// -----------
 		cluster.printCluster1(sb, lines, stringBounder);
 
 		final SvekNode added = cluster.printCluster2(sb, lines, stringBounder, dotMode, graphvizVersion, type);
@@ -167,6 +181,8 @@ public class ClusterDotString {
 			}
 		SvekUtils.println(sb);
 
+		// -----------
+
 		sb.append("}");
 		if (protection1)
 			sb.append("}");

src/net/sourceforge/plantuml/svek/DotStringFactory.java

@@ -415,6 +415,9 @@ public class DotStringFactory implements Moveable {
 		}
 
 		for (Cluster cluster : bibliotekon.allCluster()) {
+			if (cluster.getGroup().isPacked())
+				continue;
+			
 			int idx = getClusterIndex(svg, cluster.getColor());
 			final int starting = idx;
 			final List<XPoint2D> points = svgResult.substring(starting).extractList(SvgResult.POINTS_EQUALS);

src/net/sourceforge/plantuml/svek/SvekResult.java

@@ -72,7 +72,8 @@ public final class SvekResult extends AbstractTextBlock implements IEntityImage
 	public void drawU(UGraphic ug) {
 
 		for (Cluster cluster : dotStringFactory.getBibliotekon().allCluster())
-			cluster.drawU(ug, dotData.getUmlDiagramType());
+			if (cluster.getGroup().isPacked() == false)
+				cluster.drawU(ug, dotData.getUmlDiagramType());
 
 		final Style style2 = getDefaultStyleDefinition(null)
 				.getMergedStyle(dotData.getSkinParam().getCurrentStyleBuilder());