Added ability to remove links to matrix view

So far, Eclipse Capra has lacked a way to delete trace links from
the user interface. This change adds this ability to the matrix view.
The selected link in the matrix view can now be deleted with a click
on the corresponding toolbar button.

Caution: right now, this action is not undoable.
Change-Id: Icc40b5eb5de6ccb2ef8fae8ba47ad9f608fe138b

2 files changed, 28 insertions, 0 deletions

diff --git a/bundles/org.eclipse.capra.ui.matrix/src/org/eclipse/capra/ui/matrix/views/TraceabilityMatrixView.java b/bundles/org.eclipse.capra.ui.matrix/src/org/eclipse/capra/ui/matrix/views/TraceabilityMatrixView.java
index 2ce243d8..be785300 100644
--- a/bundles/org.eclipse.capra.ui.matrix/src/org/eclipse/capra/ui/matrix/views/TraceabilityMatrixView.java
+++ b/bundles/org.eclipse.capra.ui.matrix/src/org/eclipse/capra/ui/matrix/views/TraceabilityMatrixView.java
@@ -30,6 +30,7 @@ import org.eclipse.capra.core.helpers.EMFHelper;
 import org.eclipse.capra.core.helpers.EditingDomainHelper;
 import org.eclipse.capra.core.helpers.ExtensionPointHelper;
 import org.eclipse.capra.core.helpers.TraceHelper;
+import org.eclipse.capra.ui.adapters.ConnectionAdapter;
 import org.eclipse.capra.ui.helpers.SelectionSupportHelper;
 import org.eclipse.capra.ui.matrix.TraceabilityMatrixBodyToolTip;
 import org.eclipse.capra.ui.matrix.TraceabilityMatrixColumnHeaderDataProvider;
@@ -123,6 +124,7 @@ public class TraceabilityMatrixView extends ViewPart {
 	private static final String LINK_LABEL = "LINKED"; // When there is a link between
 
 	private NatTable traceMatrixTable;
+	private Action deleteLinkAction;
 	private Action refreshAction;
 	private Action showAllAction;
 	private Action exportExcelAction;
@@ -431,6 +433,8 @@ public class TraceabilityMatrixView extends ViewPart {
 	}
 
 	private void fillLocalPullDown(IMenuManager manager) {
+		manager.add(deleteLinkAction);
+		manager.add(new Separator());
 		manager.add(refreshAction);
 		manager.add(showAllAction);
 		manager.add(new Separator());
@@ -438,11 +442,27 @@ public class TraceabilityMatrixView extends ViewPart {
 	}
 
 	private void fillLocalToolBar(IToolBarManager manager) {
+		manager.add(deleteLinkAction);
 		manager.add(refreshAction);
 		manager.add(showAllAction);
 	}
 
 	private void makeActions() {
+		deleteLinkAction = new Action() {
+			@Override
+			public void run() {
+				if (selectedModels != null && !selectedModels.isEmpty()
+						&& selectedModels.get(0) instanceof ConnectionAdapter) {
+					ConnectionAdapter adapter = (ConnectionAdapter) selectedModels.get(0);
+					Connection connection = adapter.getConnection();
+					EObject traceModel = persistenceAdapter.getTraceModel(resourceSet);
+					traceAdapter.deleteTrace(List.of(connection), traceModel);
+					showAllAction.run();
+				}
+			}
+		};
+		deleteLinkAction.setText("Delete Link");
+		deleteLinkAction.setToolTipText("Delete Link");
 		refreshAction = new Action() {
 			@Override
 			public void run() {
diff --git a/bundles/org.eclipse.capra.ui/src/org/eclipse/capra/ui/adapters/ConnectionAdapter.java b/bundles/org.eclipse.capra.ui/src/org/eclipse/capra/ui/adapters/ConnectionAdapter.java
index cacb196b..4a1bbd19 100644
--- a/bundles/org.eclipse.capra.ui/src/org/eclipse/capra/ui/adapters/ConnectionAdapter.java
+++ b/bundles/org.eclipse.capra.ui/src/org/eclipse/capra/ui/adapters/ConnectionAdapter.java
@@ -121,4 +121,12 @@ public class ConnectionAdapter implements IPropertySource {
 		connection.getTlink().eSet(feature, value);
 	}
 
+	/**
+	 * Provides the connection represented by this adapter.
+	 * 
+	 * @return the connection
+	 */
+	public Connection getConnection() {
+		return this.connection;
+	}
 }