fix(gui): try to prevent jadx node leaks in UI objects

jadx-gui/src/main/java/jadx/gui/jobs/BackgroundExecutor.java

@@ -212,8 +212,15 @@ private void performCancel(ThreadPoolExecutor executor) throws InterruptedExcept
 			// force termination
 			task.cancel();
 			executor.shutdown();
-			boolean complete = executor.awaitTermination(5, TimeUnit.SECONDS);
-			LOG.debug("Task cancel complete: {}", complete ? "success" : "aborted");
+			if (executor.awaitTermination(5, TimeUnit.SECONDS)) {
+				LOG.debug("Task cancel complete");
+				return;
+			}
+			LOG.debug("Forcing tasks cancel");
+			executor.shutdownNow();
+			boolean complete = executor.awaitTermination(30, TimeUnit.SECONDS);
+			LOG.debug("Forced task cancel status: {}",
+					complete ? "success" : "fail, still active: " + executor.getActiveCount());
 		}
 
 		private Supplier<TaskStatus> buildCancelCheck(long startTime) {

jadx-gui/src/main/java/jadx/gui/ui/TabbedPane.java

@@ -309,6 +309,7 @@ private void addContentPanel(ContentPanel contentPanel) {
 	public void closeCodePanel(ContentPanel contentPanel) {
 		openTabs.remove(contentPanel.getNode());
 		remove(contentPanel);
+		contentPanel.dispose();
 	}
 
 	@Nullable

jadx-gui/src/main/java/jadx/gui/ui/codearea/AbstractCodeArea.java

@@ -1,5 +1,6 @@
 package jadx.gui.ui.codearea;
 
+import java.awt.Component;
 import java.awt.Dimension;
 import java.awt.Point;
 import java.awt.Rectangle;
@@ -8,15 +9,20 @@
 import java.awt.event.FocusListener;
 import java.awt.event.KeyAdapter;
 import java.awt.event.KeyEvent;
+import java.awt.event.MouseListener;
+import java.awt.event.MouseMotionListener;
 
 import javax.swing.AbstractAction;
+import javax.swing.Action;
 import javax.swing.JCheckBoxMenuItem;
+import javax.swing.JMenuItem;
 import javax.swing.JPopupMenu;
 import javax.swing.JViewport;
 import javax.swing.SwingUtilities;
 import javax.swing.event.CaretEvent;
 import javax.swing.event.CaretListener;
 import javax.swing.event.PopupMenuEvent;
+import javax.swing.event.PopupMenuListener;
 import javax.swing.text.BadLocationException;
 import javax.swing.text.Caret;
 import javax.swing.text.DefaultCaret;
@@ -64,8 +70,8 @@ public abstract class AbstractCodeArea extends RSyntaxTextArea {
 		}
 	}
 
-	protected final ContentPanel contentPanel;
-	protected final JNode node;
+	protected ContentPanel contentPanel;
+	protected JNode node;
 
 	public AbstractCodeArea(ContentPanel contentPanel, JNode node) {
 		this.contentPanel = contentPanel;
@@ -348,4 +354,33 @@ public JClass getJClass() {
 		}
 		return null;
 	}
+
+	public void dispose() {
+		// code area reference can still be used somewhere in UI objects,
+		// reset node reference to allow to GC jadx objects tree
+		node = null;
+		contentPanel = null;
+
+		// also clear internals
+		setLinkGenerator(null);
+		for (MouseListener mouseListener : getMouseListeners()) {
+			removeMouseListener(mouseListener);
+		}
+		for (MouseMotionListener mouseMotionListener : getMouseMotionListeners()) {
+			removeMouseMotionListener(mouseMotionListener);
+		}
+		JPopupMenu popupMenu = getPopupMenu();
+		for (PopupMenuListener popupMenuListener : popupMenu.getPopupMenuListeners()) {
+			popupMenu.removePopupMenuListener(popupMenuListener);
+		}
+		for (Component component : popupMenu.getComponents()) {
+			if (component instanceof JMenuItem) {
+				Action action = ((JMenuItem) component).getAction();
+				if (action instanceof JNodeAction) {
+					((JNodeAction) action).dispose();
+				}
+			}
+		}
+		popupMenu.removeAll();
+	}
 }

jadx-gui/src/main/java/jadx/gui/ui/codearea/ClassCodeContentPanel.java

@@ -1,6 +1,7 @@
 package jadx.gui.ui.codearea;
 
 import java.awt.BorderLayout;
+import java.awt.Component;
 import java.awt.Dimension;
 import java.awt.Point;
 
@@ -170,4 +171,16 @@ public void restoreEditorViewState(EditorViewState viewState) {
 			LOG.debug("Failed to restore caret position: {}", viewState.getCaretPos(), e);
 		}
 	}
+
+	@Override
+	public void dispose() {
+		javaCodePanel.dispose();
+		smaliCodePanel.dispose();
+		for (Component component : areaTabbedPane.getComponents()) {
+			if (component instanceof CodePanel) {
+				((CodePanel) component).dispose();
+			}
+		}
+		super.dispose();
+	}
 }

jadx-gui/src/main/java/jadx/gui/ui/codearea/CodeArea.java

@@ -282,4 +282,10 @@ public JadxWrapper getJadxWrapper() {
 	public JadxProject getProject() {
 		return getMainWindow().getProject();
 	}
+
+	@Override
+	public void dispose() {
+		super.dispose();
+		cachedCodeInfo = null;
+	}
 }

jadx-gui/src/main/java/jadx/gui/ui/codearea/CodeContentPanel.java

@@ -62,4 +62,9 @@ public void restoreEditorViewState(EditorViewState viewState) {
 		codePanel.getCodeScrollPane().getViewport().setViewPosition(viewState.getViewPoint());
 		codePanel.getCodeArea().setCaretPosition(viewState.getCaretPos());
 	}
+
+	@Override
+	public void dispose() {
+		codePanel.dispose();
+	}
 }

jadx-gui/src/main/java/jadx/gui/ui/codearea/CodePanel.java

@@ -195,4 +195,8 @@ private JadxSettings getSettings() {
 		return this.codeArea.getContentPanel().getTabbedPane()
 				.getMainWindow().getSettings();
 	}
+
+	public void dispose() {
+		codeArea.dispose();
+	}
 }

jadx-gui/src/main/java/jadx/gui/ui/codearea/CommentAction.java

@@ -11,7 +11,6 @@
 import org.slf4j.LoggerFactory;
 
 import jadx.api.ICodeInfo;
-import jadx.api.JavaClass;
 import jadx.api.JavaMethod;
 import jadx.api.JavaNode;
 import jadx.api.data.ICodeComment;
@@ -26,7 +25,6 @@
 import jadx.api.metadata.annotations.NodeDeclareRef;
 import jadx.gui.JadxWrapper;
 import jadx.gui.treemodel.JClass;
-import jadx.gui.treemodel.JNode;
 import jadx.gui.ui.dialog.CommentDialog;
 import jadx.gui.utils.DefaultPopupMenuListener;
 import jadx.gui.utils.NLS;
@@ -39,28 +37,29 @@ public class CommentAction extends AbstractAction implements DefaultPopupMenuLis
 
 	private static final Logger LOG = LoggerFactory.getLogger(CommentAction.class);
 	private final CodeArea codeArea;
-	private final JavaClass topCls;
+	private final boolean enabled;
 
 	private ICodeComment actionComment;
 
 	public CommentAction(CodeArea codeArea) {
 		super(NLS.str("popup.add_comment") + " (;)");
 		this.codeArea = codeArea;
-		JNode topNode = codeArea.getNode();
-		if (topNode instanceof JClass) {
-			this.topCls = ((JClass) topNode).getCls();
-		} else {
-			this.topCls = null;
+		this.enabled = codeArea.getNode() instanceof JClass;
+		if (enabled) {
+			UiUtils.addKeyBinding(codeArea, getKeyStroke(KeyEvent.VK_SEMICOLON, 0), "popup.add_comment",
+					() -> showCommentDialog(getCommentRef(codeArea.getCaretPosition())));
 		}
-		UiUtils.addKeyBinding(codeArea, getKeyStroke(KeyEvent.VK_SEMICOLON, 0), "popup.add_comment",
-				() -> showCommentDialog(getCommentRef(codeArea.getCaretPosition())));
 	}
 
 	@Override
 	public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
-		ICodeComment codeComment = getCommentRef(UiUtils.getOffsetAtMousePosition(codeArea));
-		setEnabled(codeComment != null);
-		this.actionComment = codeComment;
+		if (enabled) {
+			ICodeComment codeComment = getCommentRef(UiUtils.getOffsetAtMousePosition(codeArea));
+			setEnabled(codeComment != null);
+			this.actionComment = codeComment;
+		} else {
+			setEnabled(false);
+		}
 	}
 
 	@Override
@@ -83,7 +82,7 @@ private void showCommentDialog(ICodeComment codeComment) {
 	 */
 	@Nullable
 	private ICodeComment getCommentRef(int pos) {
-		if (pos == -1 || this.topCls == null) {
+		if (pos == -1) {
 			return null;
 		}
 		try {

jadx-gui/src/main/java/jadx/gui/ui/codearea/JNodeAction.java

@@ -1,6 +1,7 @@
 package jadx.gui.ui.codearea;
 
 import java.awt.event.ActionEvent;
+import java.beans.PropertyChangeListener;
 
 import javax.swing.AbstractAction;
 import javax.swing.KeyStroke;
@@ -16,7 +17,7 @@
 public abstract class JNodeAction extends AbstractAction {
 	private static final long serialVersionUID = -2600154727884853550L;
 
-	private final transient CodeArea codeArea;
+	private transient CodeArea codeArea;
 	private transient @Nullable JNode node;
 
 	public JNodeAction(String name, CodeArea codeArea) {
@@ -26,7 +27,7 @@ public JNodeAction(String name, CodeArea codeArea) {
 
 	public abstract void runAction(JNode node);
 
-	public boolean isActionEnabled(JNode node) {
+	public boolean isActionEnabled(@Nullable JNode node) {
 		return node != null;
 	}
 
@@ -47,12 +48,20 @@ public void actionPerformed(ActionEvent e) {
 		runAction(node);
 	}
 
-	public void changeNode(JNode node) {
+	public void changeNode(@Nullable JNode node) {
 		this.node = node;
 		setEnabled(isActionEnabled(node));
 	}
 
 	public CodeArea getCodeArea() {
 		return codeArea;
 	}
+
+	public void dispose() {
+		node = null;
+		codeArea = null;
+		for (PropertyChangeListener changeListener : getPropertyChangeListeners()) {
+			removePropertyChangeListener(changeListener);
+		}
+	}
 }

jadx-gui/src/main/java/jadx/gui/ui/codearea/JNodePopupListener.java

@@ -4,25 +4,40 @@
 import java.util.List;
 
 import javax.swing.event.PopupMenuEvent;
+import javax.swing.event.PopupMenuListener;
 
 import jadx.gui.treemodel.JNode;
-import jadx.gui.utils.DefaultPopupMenuListener;
 
-public final class JNodePopupListener implements DefaultPopupMenuListener {
+public final class JNodePopupListener implements PopupMenuListener {
 	private final CodeArea codeArea;
 	private final List<JNodeAction> actions = new ArrayList<>();
 
 	public JNodePopupListener(CodeArea codeArea) {
 		this.codeArea = codeArea;
 	}
 
+	public void addActions(JNodeAction action) {
+		actions.add(action);
+	}
+
+	private void updateNode(JNode node) {
+		for (JNodeAction action : actions) {
+			action.changeNode(node);
+		}
+	}
+
 	@Override
 	public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
-		JNode node = codeArea.getNodeUnderMouse();
-		actions.forEach(action -> action.changeNode(node));
+		updateNode(codeArea.getNodeUnderMouse());
 	}
 
-	public void addActions(JNodeAction action) {
-		actions.add(action);
+	@Override
+	public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
+		updateNode(null);
+	}
+
+	@Override
+	public void popupMenuCanceled(PopupMenuEvent e) {
+		updateNode(null);
 	}
 }

jadx-gui/src/main/java/jadx/gui/ui/dialog/SearchDialog.java

@@ -143,12 +143,18 @@ private SearchDialog(MainWindow mainWindow, SearchPreset preset, Set<SearchOptio
 
 	@Override
 	public void dispose() {
-		stopSearchTask();
 		if (searchDisposable != null && !searchDisposable.isDisposed()) {
 			searchDisposable.dispose();
 		}
 		resultsModel.clear();
 		removeActiveTabListener();
+		if (searchTask != null) {
+			searchTask.cancel();
+			mainWindow.getBackgroundExecutor().execute(NLS.str("progress.load"), () -> {
+				stopSearchTask();
+				unloadTempData();
+			});
+		}
 		super.dispose();
 	}
 
@@ -477,9 +483,15 @@ private synchronized void searchComplete() {
 		loadAllButton.setEnabled(!complete);
 		loadMoreButton.setEnabled(!complete);
 		updateProgressLabel(complete);
+		unloadTempData();
 		progressFinishedCommon();
 	}
 
+	private void unloadTempData() {
+		mainWindow.getWrapper().unloadClasses();
+		System.gc();
+	}
+
 	private static Flowable<String> onTextFieldChanges(final JTextField textField) {
 		return Flowable.<String>create(emitter -> {
 			DocumentListener listener = new DocumentListener() {

jadx-gui/src/main/java/jadx/gui/ui/panel/ContentPanel.java

@@ -12,8 +12,8 @@ public abstract class ContentPanel extends JPanel {
 
 	private static final long serialVersionUID = 3237031760631677822L;
 
-	protected final TabbedPane tabbedPane;
-	protected final JNode node;
+	protected TabbedPane tabbedPane;
+	protected JNode node;
 
 	protected ContentPanel(TabbedPane panel, JNode jnode) {
 		tabbedPane = panel;
@@ -44,4 +44,9 @@ public String getTabTooltip() {
 		}
 		return node.getName();
 	}
+
+	public void dispose() {
+		tabbedPane = null;
+		node = null;
+	}
 }

jadx-gui/src/main/java/jadx/gui/ui/treenodes/SummaryNode.java

@@ -109,13 +109,17 @@ private void writeInputSummary(StringEscapeUtils.Builder builder) throws IOExcep
 
 	private void writeDecompilationSummary(StringEscapeUtils.Builder builder) {
 		builder.append("<h2>Decompilation</h2>");
-		List<ClassNode> classes = wrapper.getRootNode().getClasses(false);
+		List<ClassNode> classes = wrapper.getRootNode().getClassesWithoutInner();
 		int classesCount = classes.size();
+		long notLoadedClasses = classes.stream().filter(c -> c.getState() == ProcessState.NOT_LOADED).count();
+		long loadedClasses = classes.stream().filter(c -> c.getState() == ProcessState.LOADED).count();
 		long processedClasses = classes.stream().filter(c -> c.getState() == ProcessState.PROCESS_COMPLETE).count();
 		long generatedClasses = classes.stream().filter(c -> c.getState() == ProcessState.GENERATED_AND_UNLOADED).count();
 		builder.append("<ul>");
 		builder.append("<li>Top level classes: " + classesCount + "</li>");
-		builder.append("<li>At process stage: " + valueAndPercent(processedClasses, classesCount) + "</li>");
+		builder.append("<li>Not loaded: " + valueAndPercent(notLoadedClasses, classesCount) + "</li>");
+		builder.append("<li>Loaded: " + valueAndPercent(loadedClasses, classesCount) + "</li>");
+		builder.append("<li>Processed: " + valueAndPercent(processedClasses, classesCount) + "</li>");
 		builder.append("<li>Code generated: " + valueAndPercent(generatedClasses, classesCount) + "</li>");
 		builder.append("</ul>");