[#1417] Plug-in editor: Runtime tab should show selected package

The simplest solution would be to use the section description

Author: ruspl-afed

ui/org.eclipse.pde.ui/src/org/eclipse/pde/internal/ui/PDEUIMessages.java

@@ -2249,6 +2249,10 @@ public class PDEUIMessages extends NLS {
 
 	public static String ExportPackageVisibilitySection_default;
 
+	public static String ExportPackageVisibilitySection_one;
+
+	public static String ExportPackageVisibilitySection_many;
+
 	public static String ExportPackageVisibilitySection_hideAll;
 
 	public static String ExportPackageSection_add;

ui/org.eclipse.pde.ui/src/org/eclipse/pde/internal/ui/editor/plugin/ExportPackageVisibilitySection.java

@@ -19,7 +19,11 @@
 import static org.eclipse.swt.events.SelectionListener.widgetSelectedAdapter;
 
 import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
 import java.util.List;
+import java.util.Objects;
+import java.util.stream.Collectors;
 
 import org.eclipse.jface.action.Action;
 import org.eclipse.jface.action.IMenuManager;
@@ -31,6 +35,7 @@
 import org.eclipse.jface.viewers.StructuredSelection;
 import org.eclipse.jface.viewers.TableViewer;
 import org.eclipse.jface.window.Window;
+import org.eclipse.osgi.util.NLS;
 import org.eclipse.pde.core.IBaseModel;
 import org.eclipse.pde.core.IModelChangedEvent;
 import org.eclipse.pde.core.plugin.IPluginModelBase;
@@ -378,6 +383,30 @@ private void update(ExportPackageObject[] objects) {
 		getTablePart().setButtonEnabled(1, fInternalButton.getSelection() && isEditable());
 		fFriendViewer.setInput(object);
 		fBlockChanges = false;
+		getSection().setDescription(description(objects));
+	}
+
+	private String description(ExportPackageObject[] packages) {
+		List<String> names = names(packages);
+		switch (names.size()) {
+			case 0: {
+				return PDEUIMessages.ExportPackageVisibilitySection_default;
+			}
+			case 1: {
+				return NLS.bind(PDEUIMessages.ExportPackageVisibilitySection_one, names.get(0));
+			}
+			default:
+				return NLS.bind(PDEUIMessages.ExportPackageVisibilitySection_many,
+						names.stream().collect(Collectors.joining(", "))); //$NON-NLS-1$
+		}
+
+	}
+
+	private List<String> names(ExportPackageObject[] packages) {
+		if (packages == null) {
+			return Collections.emptyList();
+		}
+		return Arrays.stream(packages).filter(Objects::nonNull).map(ExportPackageObject::getName).toList();
 	}
 
 	private BundleInputContext getBundleContext() {

ui/org.eclipse.pde.ui/src/org/eclipse/pde/internal/ui/pderesources.properties

@@ -2249,7 +2249,9 @@ ExportPackageSection_findReferences=Find References
 ExportOptionsTab_antReservedMessage=build.xml is a file name reserved for PDE
 ExportOptionsTab_allowBinaryCycles=A&llow for binary cycles in target platform
 ExportOptionsTab_use_workspace_classfiles=&Use class files compiled in the workspace
-ExportPackageVisibilitySection_default=The select package is:
+ExportPackageVisibilitySection_default=The selected package is:
+ExportPackageVisibilitySection_one=The selected package {0} is:
+ExportPackageVisibilitySection_many=The selected packages {0} are:
 ExportPackageVisibilitySection_hideAll=provisional API, generating warnings, except for:
 CrossPlatformExportPage_available=&Available platforms:
 CrossPlatformExportPage_title=Cross-platform export