Merge remote-tracking branch 'origin/GT-3279_ghidravore_gtree_improvements'

Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/symboltree/nodes/OrganizationNode.java

@@ -49,7 +49,7 @@ public class OrganizationNode extends SymbolTreeNode {
 	private OrganizationNode(List<GTreeNode> list, int max, int parentLevel, TaskMonitor monitor)
 			throws CancelledException {
 
-		setChildren(computeChildren(list, max, this, parentLevel, monitor));
+		doSetChildren(computeChildren(list, max, this, parentLevel, monitor));
 
 		GTreeNode child = getChild(0);
 		baseName = child.getName().substring(0, getPrefixSizeForGrouping(getChildren(), 1) + 1);
@@ -128,8 +128,7 @@ public class OrganizationNode extends SymbolTreeNode {
 				monitor.checkCanceled();
 				String str = list.get(i).getName();
 				if (stringsDiffer(prevStr, str, characterOffset)) {
-					addNode(children, list, start, i - 1, maxNodes, characterOffset,
+					addNode(children, list, start, i - 1, maxNodes, characterOffset, monitor);
-						monitor);
 					start = i;
 				}
 				prevStr = str;
@@ -144,16 +143,14 @@ public class OrganizationNode extends SymbolTreeNode {
 			return true;
 		}
 		return s1.substring(0, diffLevel + 1)
-				.compareToIgnoreCase(
+				.compareToIgnoreCase(s2.substring(0, diffLevel + 1)) != 0;
-					s2.substring(0, diffLevel + 1)) != 0;
 	}
 
 	private static void addNode(List<GTreeNode> children, List<GTreeNode> list, int start, int end,
-			int max, int diffLevel, TaskMonitor monitor)
+			int max, int diffLevel, TaskMonitor monitor) throws CancelledException {
-			throws CancelledException {
 		if (end - start > 0) {
-			children.add(new OrganizationNode(list.subList(start, end + 1), max, diffLevel,
+			children.add(
-				monitor));
+				new OrganizationNode(list.subList(start, end + 1), max, diffLevel, monitor));
 		}
 		else {
 			GTreeNode node = list.get(start);

Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/symboltree/nodes/SymbolCategoryNode.java

@@ -79,8 +79,8 @@ public abstract class SymbolCategoryNode extends SymbolTreeNode {
 		while (it.hasNext()) {
 			Symbol s = it.next();
 			monitor.incrementProgress(1);
-			if (s != null && (s.getSymbolType() == symbolType)) {
 			monitor.checkCanceled();
+			if (s != null && (s.getSymbolType() == symbolType)) {
 				list.add(SymbolNode.createNode(s, program));
 			}
 		}

Ghidra/Framework/Docking/src/main/java/docking/widgets/tree/CoreGTreeNode.java

@@ -18,8 +18,11 @@ package docking.widgets.tree;
 import java.util.*;
 import java.util.concurrent.CopyOnWriteArrayList;
 
+import javax.swing.JTree;
+
 import docking.widgets.tree.internal.InProgressGTreeNode;
 import ghidra.util.Swing;
+import ghidra.util.SystemUtilities;
 
 /**
  * This class exists to help prevent threading errors in {@link GTreeNode} and subclasses,
@@ -27,24 +30,34 @@ import ghidra.util.Swing;
  * <P>
  * This implementation uses a {@link CopyOnWriteArrayList} to store its children. The theory is
  * that this will allow direct thread-safe access to the children without having to worry about
- * {@link ConcurrentModificationException}s.  Also, the assumption is that accessing the children 
+ * {@link ConcurrentModificationException}s while iterating the children.  Also, the assumption
- * will occur much more frequently than modifying the children.  This should only be a problem if
+ * is that accessing the children will occur much more frequently than modifying the children.  
- * a direct descendent of AbstractGTreeNode creates it children by calling
+ * This should only be a problem if a direct descendent of GTreeNode creates its children by calling
  * addNode many times. But in that case, the tree should be using Lazy or 
  * SlowLoading nodes which always load into another list first and all the children will be set 
  * on a node in a single operation.
  * <P>
- * Subclasses that need access to the children
+ * Subclasses that need access to the children can call the {@link #children()} method which will
- * can call the {@link #children()} method which will ensure that the children are
+ * ensure that the children are loaded (not null). Since this class uses a
- * loaded (not null). Since this class uses a {@link CopyOnWriteArrayList}, subclasses that call
+ * {@link CopyOnWriteArrayList}, subclasses that call the {@link #children()} method can safely
- * the {@link #children()} method can safely operate and iterate on the list they get back without
+ * iterate the list without having to worry about getting a {@link ConcurrentModificationException}.  
- * having to worry about getting a {@link ConcurrentModificationException}.  
  * <P>
  * This class uses synchronization to assure that the parent/children relationship is stable across
  * threads.  To avoid deadlocks, the sychronization strategy is that if you have the lock on
- * a parent node, you can safely acquire the lock on any of its descendants, put never its 
+ * a parent node, you can safely acquire the lock on any of its descendants, but never its 
  * ancestors.  To facilitate this strategy, the {@link #getParent()} is not synchronized, but it
  * is made volatile to assure the current value is always used.
+ * <P>
+ * Except for the {@link #doSetChildren(List)} method, all other calls that mutate the
+ * children must be called on the swing thread.  The idea is that bulk operations can work efficiently
+ * by avoiding constantly switching to the swing thread to mutate the tree. This works because
+ * the bulk setting of the children generates a coarse "node structure changed" event, which causes the
+ * underlying {@link JTree} to rebuild its internal cache of the tree.  Individual add/remove operations
+ * have to be done very carefully such that the {@link JTree} is always updated on one change before any
+ * additional changes are done.  This is why those operations are required to be done on the swing
+ * thread, which combined with the fact that all mutate operations are synchronized, keeps the JTree
+ * happy.
+ * 
  */
 abstract class CoreGTreeNode implements Cloneable {
 	// the parent is volatile to facilitate the synchronization strategy (see comments above)
@@ -118,6 +131,25 @@ abstract class CoreGTreeNode implements Cloneable {
 	 */
 	protected abstract List<GTreeNode> generateChildren();
 
+	/**
+	 * Sets the children of this node to the given list of child nodes and fires the appropriate
+	 * tree event to kick the tree to update the display.  Note: This method must be called
+	 * from the swing thread because it will notify the underlying JTree.
+	 * @param childList the list of child nodes to assign as children to this node
+	 * @see #doSetChildren(List) if calling from a background thread.
+	 */
+	protected synchronized void doSetChildrenAndFireEvent(List<GTreeNode> childList) {
+		doSetChildren(childList);
+		doFireNodeStructureChanged();
+	}
+
+	/**
+	 * Sets the children of this node to the given list of child nodes, but does not notify the
+	 * tree. This method does not have to be called from the swing thread.  It is intended to be
+	 * used by background threads that want to populate all or part of the tree, but wait until
+	 * the bulk operations are completed before notifying the tree.
+	 * @param childList the list of child nodes to assign as children to this node
+	 */
 	protected synchronized void doSetChildren(List<GTreeNode> childList) {
 		List<GTreeNode> oldChildren = children;
 		children = null;
@@ -142,6 +174,57 @@ abstract class CoreGTreeNode implements Cloneable {
 		}
 	}
 
+	/**
+	 * Adds a node to this node's children. Must be called from the swing thread.
+	 * @param node the node to add as a child to this node
+	 */
+	protected synchronized void doAddNode(GTreeNode node) {
+		children().add(node);
+		node.setParent((GTreeNode) this);
+		doFireNodeAdded(node);
+	}
+
+	/**
+	 * Adds a node to this node's children at the given index and notifies the tree.
+	 * Must be called from the swing thread.
+	 * @param index the index at which to add the new node
+	 * @param node the node to add as a child to this node
+	 */
+	protected synchronized void doAddNode(int index, GTreeNode node) {
+		List<GTreeNode> kids = children();
+		int insertIndex = Math.min(kids.size(), index);
+		kids.add(insertIndex, node);
+		node.setParent((GTreeNode) this);
+		doFireNodeAdded(node);
+	}
+
+	/**
+	 * Removes the node from this node's children and notifies the tree.  Must be called
+	 * from the swing thread.
+	 * @param node the node to remove
+	 */
+	protected synchronized void doRemoveNode(GTreeNode node) {
+		List<GTreeNode> kids = children();
+		int index = kids.indexOf(node);
+		if (index >= 0) {
+			kids.remove(index);
+			node.setParent(null);
+			doFireNodeRemoved(node, index);
+		}
+	}
+
+	/**
+	 * Adds the given nodes to this node's children. Must be called from the swing thread.
+	 * @param nodes the nodes to add to the children this node
+	 */
+	protected synchronized void doAddNodes(List<GTreeNode> nodes) {
+		for (GTreeNode node : nodes) {
+			node.setParent((GTreeNode) this);
+		}
+		children().addAll(nodes);
+		doFireNodeStructureChanged();
+	}
+
 	/**
 	 * Creates a clone of this node.  The clone should contain a shallow copy of all the node's
 	 * attributes except that the parent and children are null.
@@ -157,7 +240,6 @@ abstract class CoreGTreeNode implements Cloneable {
 	}
 
 	public void dispose() {
-
 		List<GTreeNode> oldChildren;
 		synchronized (this) {
 			oldChildren = children;
@@ -242,4 +324,44 @@ abstract class CoreGTreeNode implements Cloneable {
 		return false;
 	}
 
+	protected void doFireNodeAdded(GTreeNode newNode) {
+		assertSwing();
+		GTree tree = getTree();
+		if (tree != null) {
+			tree.getModel().fireNodeAdded((GTreeNode) this, newNode);
+			tree.refilterLater(newNode);
+		}
+	}
+
+	protected void doFireNodeRemoved(GTreeNode removedNode, int index) {
+		assertSwing();
+		GTree tree = getTree();
+		if (tree != null) {
+			tree.getModel().fireNodeRemoved((GTreeNode) this, removedNode, index);
+		}
+	}
+
+	protected void doFireNodeStructureChanged() {
+		assertSwing();
+		GTree tree = getTree();
+		if (tree != null) {
+			tree.getModel().fireNodeStructureChanged((GTreeNode) this);
+			tree.refilterLater();
+		}
+	}
+
+	protected void doFireNodeChanged() {
+		assertSwing();
+		GTree tree = getTree();
+		if (tree != null) {
+			tree.getModel().fireNodeDataChanged((GTreeNode) this);
+			tree.refilterLater();
+		}
+	}
+
+	private void assertSwing() {
+		SystemUtilities
+				.assertThisIsTheSwingThread("tree events must be called from the AWT thread");
+	}
+
 }

Ghidra/Framework/Docking/src/main/java/docking/widgets/tree/GTree.java

@@ -25,6 +25,7 @@ import java.awt.event.MouseListener;
 import java.io.PrintWriter;
 import java.util.*;
 import java.util.List;
+import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicLong;
 
 import javax.swing.*;
@@ -40,8 +41,8 @@ import docking.widgets.tree.internal.*;
 import docking.widgets.tree.support.*;
 import docking.widgets.tree.support.GTreeSelectionEvent.EventOrigin;
 import docking.widgets.tree.tasks.*;
-import ghidra.util.FilterTransformer;
+import ghidra.util.*;
-import ghidra.util.SystemUtilities;
+import ghidra.util.exception.AssertException;
 import ghidra.util.exception.CancelledException;
 import ghidra.util.task.*;
 import ghidra.util.worker.PriorityWorker;
@@ -56,13 +57,20 @@ public class GTree extends JPanel implements BusyListener {
 	private GTreeModel model;
 
 	/**
-	 * This is the root node that either is the actual current root node, or the node that will
+	 * This is the root node of the tree's data model.  It may or may not be the root node
-	 * be the real root node, once the Worker has loaded it.  Thus, it is possible that a call to
+	 * that is currently being displayed by the tree. If there is currently a 
-	 * {@link GTreeModel#getRoot()} will return an {@link InProgressGTreeRootNode}.  By keeping
+	 * filter applied, then then the displayed root node will be a clone whose children have been
-	 * this variable around, we can give this node to clients, regardless of the root node
+	 * trimmed to only those that match the filter.  By keeping this variable around, we can give
-	 * visible in the tree.
+	 * this node to clients, regardless of the root node visible in the tree.
 	 */
-	private GTreeNode realRootNode;
+	private volatile GTreeNode realModelRootNode;
+
+	/**
+	 * This is the root that is currently being displayed. This node will be either exactly the 
+	 * same instance as the realModelRootNode (if no filter has been applied) or it will be the
+	 * filtered clone of the realModelRootNode. 
+	 */
+	private volatile GTreeNode realViewRootNode;
 
 	/**
 	 * The rootParent is a node that is assigned as the parent to the realRootNode. It's primary purpose is
@@ -108,7 +116,8 @@ public class GTree extends JPanel implements BusyListener {
 	 */
 	public GTree(GTreeNode root) {
 		uniquePreferenceKey = generateFilterPreferenceKey();
-		this.realRootNode = root;
+		this.realModelRootNode = root;
+		this.realViewRootNode = root;
 		monitor = new TaskMonitorComponent();
 		monitor.setShowProgressValue(false);// the tree's progress is fabricated--don't paint it
 		worker = new PriorityWorker("GTree Worker", monitor);
@@ -265,7 +274,8 @@ public class GTree extends JPanel implements BusyListener {
 		if (root != null) {
 			root.dispose();
 		}
-		realRootNode.dispose();// just in case we were loading
+		realModelRootNode.dispose();
+		realViewRootNode.dispose();
 		model.dispose();
 	}
 
@@ -728,58 +738,67 @@ public class GTree extends JPanel implements BusyListener {
 	 * @param rootNode The node to set.
 	 */
 	public void setRootNode(GTreeNode rootNode) {
-		GTreeNode oldRoot = doSetRootNode(rootNode, true);
+		worker.clearAllJobs();
+		rootNode.setParent(rootParent);
+		realModelRootNode = rootNode;
+		realViewRootNode = rootNode;
+		GTreeNode oldRoot;
+		try {
+			oldRoot = doSetModelRootNode(rootNode);
 			oldRoot.dispose();
 			if (filter != null) {
 				filterUpdateManager.update();
 			}
 		}
-
+		catch (CancelledException e) {
-	private GTreeNode doSetRootNode(GTreeNode rootNode, boolean waitForJobs) {
+			throw new AssertException("Setting the root node should never be cancelled");
-		worker.clearAllJobs();
-		GTreeNode root = model.getModelRoot();
-
-		this.realRootNode = rootNode;
-		rootNode.setParent(rootParent);
-
-		//
-		// We need to use our standard 'worker pipeline' for mutations to the tree.  This means
-		// that requests from the Swing thread must go through the worker.  However,
-		// non-Swing-thread requests can just block while we wait for cancelled work to finish
-		// and setup the new root.  The assumption is that other threads (like test threads and
-		// client background threads) will want to block in order to get real-time data.  Further,
-		// since they are not in the Swing thread, blocking will not lock-up the GUI.
-		//
-		if (SwingUtilities.isEventDispatchThread()) {
-			model.setRootNode(new InProgressGTreeRootNode());
-			runTask(new SetRootNodeTask(this, rootNode, model));
 		}
-		else {
-			if (waitForJobs) {
-				worker.waitUntilNoJobsScheduled(Integer.MAX_VALUE);
-			}
-			monitor.clearCanceled();
-			model.setRootNode(rootNode);
-		}
-		return root;
 	}
 
 	void setFilteredRootNode(GTreeNode filteredRootNode) {
 		filteredRootNode.setParent(rootParent);
-		GTreeNode currentRoot = (GTreeNode) model.getRoot();
+		realViewRootNode = filteredRootNode;
-		model.setRootNode(filteredRootNode);
+		try {
-		if (currentRoot != realRootNode) {
+			GTreeNode currentRoot = doSetModelRootNode(filteredRootNode);
+			if (currentRoot != realModelRootNode) {
 				currentRoot.disposeClones();
 			}
 		}
+		catch (CancelledException e) {
+			// the filter task was cancelled
+		}
+	}
 
 	void restoreNonFilteredRootNode() {
-		GTreeNode currentRoot = (GTreeNode) model.getRoot();
+		realViewRootNode = realModelRootNode;
-		model.setRootNode(realRootNode);
+		try {
-		if (currentRoot != realRootNode) {
+			GTreeNode currentRoot = doSetModelRootNode(realModelRootNode);
+			if (currentRoot != realModelRootNode) {
 				currentRoot.disposeClones();
 			}
 		}
+		catch (CancelledException e) {
+			// the filter task was cancelled
+		}
+	}
+
+	private GTreeNode doSetModelRootNode(GTreeNode rootNode) throws CancelledException {
+		// If this method is called from a background filter task, then it may be cancelled
+		// by other tree operations.  Not all tasks can be cancelled.
+		AtomicBoolean wasCancelled = new AtomicBoolean(true);
+		GTreeNode node = Swing.runNow(() -> {
+			GTreeNode old = model.getModelRoot();
+			model.setRootNode(rootNode);
+
+			wasCancelled.set(false);
+			return old;
+		});
+
+		if (wasCancelled.get()) {
+			throw new CancelledException();
+		}
+		return node;
+	}
 
 	/**
 	 * This method returns the root node that was provided to the tree by the client, whether from the
@@ -790,7 +809,7 @@ public class GTree extends JPanel implements BusyListener {
 	 * @return the root node as provided by the client.
 	 */
 	public GTreeNode getModelRoot() {
-		return realRootNode;
+		return realModelRootNode;
 	}
 
 	/**
@@ -801,7 +820,7 @@ public class GTree extends JPanel implements BusyListener {
 	 * @return the root node currently being display by the {@link JTree}
 	 */
 	public GTreeNode getViewRoot() {
-		return (GTreeNode) model.getRoot();
+		return realViewRootNode;
 	}
 
 	/**

Ghidra/Framework/Docking/src/main/java/docking/widgets/tree/GTreeNode.java

@@ -33,6 +33,9 @@ import util.CollectionUtils;
  * all their children in hand when initially constructed (either in their constructor or externally
  * using {@link #addNode(GTreeNode)} or {@link #setChildren(List)}.  For large trees, subclasses
  * should instead extend {@link GTreeLazyNode} or {@link GTreeSlowLoadingNode}
+ * <P>
+ * All methods in this class that mutate the children node must perform that operation in
+ * the swing thread.
  */
 public abstract class GTreeNode extends CoreGTreeNode implements Comparable<GTreeNode> {
 	private static AtomicLong NEXT_ID = new AtomicLong();
@@ -85,9 +88,7 @@ public abstract class GTreeNode extends CoreGTreeNode implements Comparable<GTre
 	 * @param node the node to add as a child
 	 */
 	public void addNode(GTreeNode node) {
-		children().add(node);
+		Swing.runNow(() -> doAddNode(node));
-		node.setParent(this);
-		fireNodeAdded(this, node);
 	}
 
 	/**
@@ -95,11 +96,7 @@ public abstract class GTreeNode extends CoreGTreeNode implements Comparable<GTre
 	 * @param nodes the nodes to add
 	 */
 	public void addNodes(List<GTreeNode> nodes) {
-		for (GTreeNode node : nodes) {
+		Swing.runNow(() -> doAddNodes(nodes));
-			node.setParent(this);
-		}
-		children().addAll(nodes);
-		fireNodeStructureChanged(this);
 	}
 
 	/**
@@ -108,9 +105,7 @@ public abstract class GTreeNode extends CoreGTreeNode implements Comparable<GTre
 	 * @param node the node to add as a child of this node
 	 */
 	public void addNode(int index, GTreeNode node) {
-		children().add(index, node);
+		Swing.runNow(() -> doAddNode(index, node));
-		node.setParent(this);
-		fireNodeAdded(this, node);
 	}
 
 	/**
@@ -216,17 +211,7 @@ public abstract class GTreeNode extends CoreGTreeNode implements Comparable<GTre
 	 * Removes all children from this node.  The children nodes will be disposed.
 	 */
 	public void removeAll() {
-		if (!isLoaded()) {
+		Swing.runNow(() -> doSetChildrenAndFireEvent(null));
-			return;
-		}
-		List<GTreeNode> children = children();
-		if (children != null) {
-			for (GTreeNode child : children) {
-				child.dispose();
-			}
-			children().clear();
-			fireNodeStructureChanged(this);
-		}
 	}
 
 	/**
@@ -234,14 +219,7 @@ public abstract class GTreeNode extends CoreGTreeNode implements Comparable<GTre
 	 * @param node the to be removed
 	 */
 	public void removeNode(GTreeNode node) {
-		if (!isLoaded()) {
+		Swing.runNow(() -> doRemoveNode(node));
-			return;
-		}
-		List<GTreeNode> children = children();
-		if (children.remove(node)) {
-			node.setParent(null);
-			fireNodeRemoved(this, node);
-		}
 	}
 
 	/**
@@ -249,8 +227,7 @@ public abstract class GTreeNode extends CoreGTreeNode implements Comparable<GTre
 	 * @param childList this list of nodes to be set as children of this node
 	 */
 	public void setChildren(List<GTreeNode> childList) {
-		doSetChildren(childList);
+		Swing.runNow(() -> doSetChildrenAndFireEvent(childList));
-		fireNodeStructureChanged(this);
 	}
 
 	/**
@@ -430,11 +407,7 @@ public abstract class GTreeNode extends CoreGTreeNode implements Comparable<GTre
 	 * @param node the node that has changed.
 	 */
 	public void fireNodeStructureChanged(GTreeNode node) {
-		GTree tree = getTree();
+		Swing.runNow(() -> doFireNodeStructureChanged());
-		if (tree != null) {
-			Swing.runNow(() -> tree.getModel().fireNodeStructureChanged(node));
-			tree.refilterLater();
-		}
 	}
 
 	/**
@@ -443,28 +416,7 @@ public abstract class GTreeNode extends CoreGTreeNode implements Comparable<GTre
 	 * @param node the that changed
 	 */
 	public void fireNodeChanged(GTreeNode parentNode, GTreeNode node) {
-		GTree tree = getTree();
+		Swing.runNow(() -> doFireNodeChanged());
-		if (tree != null) {
-			Swing.runNow(() -> tree.getModel().fireNodeDataChanged(parentNode, node));
-			tree.refilterLater();
-		}
-	}
-
-	protected void fireNodeAdded(GTreeNode parentNode, GTreeNode newNode) {
-		GTree tree = getTree();
-		if (tree != null) {
-			Swing.runNow(() -> tree.getModel().fireNodeAdded(parentNode, newNode));
-			tree.refilterLater(newNode);
-		}
-	}
-
-	protected void fireNodeRemoved(GTreeNode parentNode, GTreeNode removedNode) {
-
-		GTree tree = getTree();
-		if (tree != null) {
-			Swing.runNow(
-				() -> tree.getModel().fireNodeRemoved(parentNode, removedNode));
-		}
 	}
 
 	private GTreeNode[] getPathToRoot(GTreeNode node, int depth) {

Ghidra/Framework/Docking/src/main/java/docking/widgets/tree/GTreeSlowLoadingNode.java

@@ -37,8 +37,7 @@ public abstract class GTreeSlowLoadingNode extends GTreeLazyNode {
 	 * @return the list of children for this node.
 	 * @throws CancelledException if the monitor is cancelled
 	 */
-	public abstract List<GTreeNode> generateChildren(TaskMonitor monitor)
+	public abstract List<GTreeNode> generateChildren(TaskMonitor monitor) throws CancelledException;
-			throws CancelledException;
 
 	@Override
 	protected final List<GTreeNode> generateChildren() {

Ghidra/Framework/Docking/src/main/java/docking/widgets/tree/internal/GTreeModel.java

@@ -25,11 +25,12 @@ import javax.swing.tree.TreePath;
 
 import docking.widgets.tree.GTree;
 import docking.widgets.tree.GTreeNode;
+import ghidra.util.Swing;
 import ghidra.util.SystemUtilities;
 
 public class GTreeModel implements TreeModel {
 
-	private GTreeNode root;
+	private volatile GTreeNode root;
 	private List<TreeModelListener> listeners = new ArrayList<TreeModelListener>();
 	private boolean isFiringNodeStructureChanged;
 	private volatile boolean eventsEnabled = true;
@@ -76,8 +77,14 @@ public class GTreeModel implements TreeModel {
 			return gTreeParent.getChild(index);
 		}
 		catch (IndexOutOfBoundsException e) {
-			// children must have be changed outside of swing thread, should get another event
+			// This can happen if the client code mutates the children of this node in a background
-			// to fix things up, so just return an in-progress node
+			// thread such that there are fewer child nodes on this node, and then before the tree
+			// is notified, the JTree attempts to access a child that is no longer present. The
+			// GTree design specifically allows this situation to occur as a trade off for 
+			// better performance when performing bulk operations (such as filtering).  If this
+			// does occur, this can be handled easily by temporarily returning a dummy node and 
+			// scheduling a node structure changed event to reset the JTree.
+			Swing.runLater(() -> fireNodeStructureChanged((GTreeNode) parent));
 			return new InProgressGTreeNode();
 		}
 	}
@@ -121,9 +128,10 @@ public class GTreeModel implements TreeModel {
 			}
 			if (node != changedNode) {
 				node.setChildren(null);
+				return;	// the previous call will generate the proper event, so bail
 			}
 
-			TreeModelEvent event = new TreeModelEvent(this, changedNode.getTreePath());
+			TreeModelEvent event = new TreeModelEvent(this, node.getTreePath());
 			for (TreeModelListener listener : listeners) {
 				listener.treeStructureChanged(event);
 			}
@@ -137,43 +145,23 @@ public class GTreeModel implements TreeModel {
 		if (!eventsEnabled) {
 			return;
 		}
-		SystemUtilities.runIfSwingOrPostSwingLater(new Runnable() {
+		Swing.runIfSwingOrRunLater(() -> {
-			@Override
-			public void run() {
 			GTreeNode rootNode = root;
 			if (rootNode != null) {
-					fireNodeStructureChanged(root);
+				fireNodeStructureChanged(rootNode);
-				}
 			}
 		});
 	}
 
-	public void fireNodeDataChanged(final GTreeNode parentNode, final GTreeNode changedNode) {
+	public void fireNodeDataChanged(GTreeNode changedNode) {
 		if (!eventsEnabled) {
 			return;
 		}
 		SystemUtilities.assertThisIsTheSwingThread(
 			"GTreeModel.fireNodeDataChanged() must be " + "called from the AWT thread");
 
-		TreeModelEvent event;
+		TreeModelEvent event = getChangedNodeEvent(changedNode);
-		if (parentNode == null) { // special case when root node changes.
-			event = new TreeModelEvent(this, root.getTreePath(), null, null);
-		}
-		else {
-			GTreeNode node = convertToViewNode(changedNode);
-			if (node == null) {
-				return;
-			}
 
-			int indexInParent = node.getIndexInParent();
-			if (indexInParent < 0) {
-				return;
-			}
-			event =
-				new TreeModelEvent(this, node.getParent().getTreePath(),
-					new int[] { indexInParent },
-					new Object[] { changedNode });
-		}
 		for (TreeModelListener listener : listeners) {
 			listener.treeNodesChanged(event);
 		}
@@ -186,33 +174,49 @@ public class GTreeModel implements TreeModel {
 		SystemUtilities.assertThisIsTheSwingThread(
 			"GTreeModel.fireNodeAdded() must be " + "called from the AWT thread");
 
-		GTreeNode node = convertToViewNode(parentNode);
+		GTreeNode parent = convertToViewNode(parentNode);
-		if (node == null) {
+		if (parent == null) {  // it will be null if filtered out
 			return;
 		}
 
-		TreeModelEvent event = new TreeModelEvent(this, node.getTreePath());
+		int index = parent.getIndexOfChild(newNode);
+		if (index < 0) {
+			// the index will be -1 if filtered out
+			return;
+		}
+
+		TreeModelEvent event = new TreeModelEvent(this, parent.getTreePath(), new int[] { index },
+			new Object[] { newNode });
 		for (TreeModelListener listener : listeners) {
-			listener.treeStructureChanged(event);
+			listener.treeNodesInserted(event);
 		}
 	}
 
-	public void fireNodeRemoved(final GTreeNode parentNode, final GTreeNode removedNode) {
+	public void fireNodeRemoved(GTreeNode parentNode, GTreeNode removedNode, int index) {
 
 		SystemUtilities.assertThisIsTheSwingThread(
 			"GTreeModel.fireNodeRemoved() must be " + "called from the AWT thread");
 
-		GTreeNode node = convertToViewNode(parentNode);
+		GTreeNode parent = convertToViewNode(parentNode);
-		if (node == null) {
+		if (parent == null) {  // will be null if filtered out
 			return;
 		}
-		if (node != parentNode) {
+
-			node.removeNode(removedNode);
+		// if filtered, remove filtered node
+		if (parent != parentNode) {
+			index = removeFromFiltered(parent, removedNode);
+			return;  // the above call will generate the event for the filtered node
 		}
 
-		TreeModelEvent event = new TreeModelEvent(this, node.getTreePath());
+		if (index < 0) {  // will be -1 if filtered out
+			return;
+		}
+
+		TreeModelEvent event = new TreeModelEvent(this, parent.getTreePath(), new int[] { index },
+			new Object[] { removedNode });
+
 		for (TreeModelListener listener : listeners) {
-			listener.treeStructureChanged(event);
+			listener.treeNodesRemoved(event);
 		}
 	}
 
@@ -224,6 +228,27 @@ public class GTreeModel implements TreeModel {
 		eventsEnabled = b;
 	}
 
+	private TreeModelEvent getChangedNodeEvent(GTreeNode changedNode) {
+		GTreeNode parentNode = changedNode.getParent();
+		if (parentNode == null) { // tree requires different event form when it is the root that changes
+			return new TreeModelEvent(this, root.getTreePath(), null, null);
+		}
+
+		GTreeNode node = convertToViewNode(changedNode);
+		if (node == null) {
+			return null;
+		}
+
+		int indexInParent = node.getIndexInParent();
+		if (indexInParent < 0) {
+			return null;
+		}
+
+		return new TreeModelEvent(this, node.getParent().getTreePath(), new int[] { indexInParent },
+			new Object[] { changedNode });
+
+	}
+
 	private GTreeNode convertToViewNode(GTreeNode node) {
 		if (node.getRoot() == root) {
 			return node;
@@ -234,4 +259,12 @@ public class GTreeModel implements TreeModel {
 		}
 		return null;
 	}
+
+	private int removeFromFiltered(GTreeNode parent, GTreeNode removedNode) {
+		int index = parent.getIndexOfChild(removedNode);
+		if (index >= 0) {
+			parent.removeNode(removedNode);
+		}
+		return index;
+	}
 }

Ghidra/Framework/Docking/src/test/java/docking/widgets/tree/GTreeNodeTest.java

@@ -285,7 +285,7 @@ public class GTreeNodeTest {
 		assertEquals(1, events.size());
 		TestEvent event = events.get(0);
 		assertEquals(EventType.NODE_REMOVED, event.type);
-		assertEquals(root, event.node);
+		assertEquals(root, event.parent);
 	}
 
 	@Test
@@ -432,23 +432,23 @@ public class GTreeNodeTest {
 		}
 
 		@Override
-		public void fireNodeStructureChanged(GTreeNode node) {
+		public void doFireNodeStructureChanged() {
-			events.add(new TestEvent(EventType.STRUCTURE_CHANGED, null, node, -1));
+			events.add(new TestEvent(EventType.STRUCTURE_CHANGED, null, this, -1));
 		}
 
 		@Override
-		public void fireNodeChanged(GTreeNode parent, GTreeNode node) {
+		public void doFireNodeChanged() {
-			events.add(new TestEvent(EventType.NODE_CHANGED, parent, node, -1));
+			events.add(new TestEvent(EventType.NODE_CHANGED, getParent(), this, -1));
 		}
 
 		@Override
-		protected void fireNodeAdded(GTreeNode parentNode, GTreeNode newNode) {
+		protected void doFireNodeAdded(GTreeNode newNode) {
-			events.add(new TestEvent(EventType.NODE_ADDED, parentNode, newNode, -1));
+			events.add(new TestEvent(EventType.NODE_ADDED, this, newNode, -1));
 		}
 
 		@Override
-		protected void fireNodeRemoved(GTreeNode parentNode, GTreeNode removedNode) {
+		protected void doFireNodeRemoved(GTreeNode removedNode, int index) {
-			events.add(new TestEvent(EventType.NODE_REMOVED, null, parentNode, -1));
+			events.add(new TestEvent(EventType.NODE_REMOVED, this, removedNode, -1));
 		}
 	}