focus parent of deleted key path

src/main/java/de/marhali/easyi18n/InstanceManager.java

@@ -65,8 +65,10 @@ public class InstanceManager {
             if(success) {
                 this.bus.propagate().onUpdateData(this.store.getData());
 
-                if(!update.isDeletion()) { // TODO: maybe focus parent if key was deleted
+                if(!update.isDeletion()) {
                     this.bus.propagate().onFocusKey(update.getChange().getKey());
+                } else {
+                    this.bus.propagate().onFocusKey(update.getOrigin().getKey());
                 }
             }
         });

src/main/java/de/marhali/easyi18n/tabs/TreeView.java

@@ -87,7 +87,12 @@ public class TreeView implements BusListener {
     @Override
     public void onFocusKey(@Nullable String key) {
         if(key != null && currentMapper != null) {
-            this.tree.scrollPathToVisible(currentMapper.findTreePath(key));
+            TreePath path = currentMapper.findTreePath(key);
+            this.tree.scrollPathToVisible(path);
+
+            if(this.tree.isCollapsed(path)) {
+                this.tree.expandPath(path);
+            }
         }
     }
 

src/main/java/de/marhali/easyi18n/tabs/mapper/TreeModelMapper.java

@@ -14,6 +14,7 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import javax.swing.tree.*;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 
@@ -111,19 +112,22 @@ public class TreeModelMapper extends DefaultTreeModel implements SearchQueryList
 
     public @NotNull TreePath findTreePath(@NotNull String fullPath) {
         List<String> sections = new PathUtil(this.state.isNestedKeys()).split(fullPath);
-        Object[] nodes = new Object[sections.size() + 1];
+        List<Object> nodes = new ArrayList<>();
 
-        int pos = 0;
         TreeNode currentNode = (TreeNode) this.getRoot();
-        nodes[pos] = currentNode;
+        nodes.add(currentNode);
 
         for(String section : sections) {
-            pos++;
             currentNode = this.findNode(currentNode, section);
-            nodes[pos] = currentNode;
+
+            if(currentNode == null) {
+                break;
+            }
+
+            nodes.add(currentNode);
         }
 
-        return new TreePath(nodes);
+        return new TreePath(nodes.toArray());
     }
 
     public @Nullable DefaultMutableTreeNode findNode(@NotNull TreeNode parent, @NotNull String key) {
@@ -144,6 +148,6 @@ public class TreeModelMapper extends DefaultTreeModel implements SearchQueryList
             }
         }
 
-        throw new NullPointerException("Cannot find node by key: " + key);
+        return null;
     }
 }