Add an action to highlight the current stack frame for debugging

Author: gzsombor

org.eclipse.jdt.debug.ui/plugin.properties

@@ -189,6 +189,9 @@ collapseStackFrames.tooltip=Hide less relevant stack frames
 colorizeStackFrames.label=Mark Stack Frames with &Colors
 colorizeStackFrames.tooltip=Based on the function mark the stack frames with different colors
 
+highlightStackFrame.label=Highlight Stack Frame
+highlightStackFrame.tooltip=Always mark this stack frame distinctly
+
 stepIntoSelectionHyperlinkDetector.label=Step Into Selection
 stepIntoSelectionHyperlinkDetector.description=Performs the step into selection command on demand via a hyperlink
 

org.eclipse.jdt.debug.ui/plugin.xml

@@ -1740,6 +1740,14 @@
                enablesFor="+"
                id="org.eclipse.jdt.debug.ui.actions.EditStepFiltersAction">
          </action>
+         <action
+               label="%highlightStackFrame.label"
+               tooltip="%highlightStackFrame.tooltip"
+               menubarPath="emptyThreadGroup"
+               enablesFor="+"
+               class="org.eclipse.jdt.internal.debug.ui.actions.HighlightStackFrameAction"
+               id="org.eclipse.jdt.debug.ui.actions.HighlightStackFrameAction">
+         </action>
       </objectContribution>
       <viewerContribution
             targetID="org.eclipse.debug.ui.VariableView.detail"

org.eclipse.jdt.debug.ui/ui/org/eclipse/jdt/internal/debug/ui/actions/HighlightStackFrameAction.java

@@ -0,0 +1,68 @@
+/*******************************************************************************
+ * Copyright (c) 2023 Zsombor Gegesy and others.
+ *
+ * This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License 2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     Zsombor Gegesy - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.jdt.internal.debug.ui.actions;
+
+import java.util.HashSet;
+
+import org.eclipse.debug.core.DebugException;
+import org.eclipse.debug.core.model.IStackFrame;
+import org.eclipse.debug.core.model.IThread;
+import org.eclipse.jdt.debug.core.IJavaStackFrame;
+import org.eclipse.jdt.internal.debug.ui.JDIDebugUIPlugin;
+import org.eclipse.jface.action.IAction;
+import org.eclipse.jface.viewers.IStructuredSelection;
+
+/**
+ * Add the current stack frame to the highlighted frames.
+ *
+ */
+public class HighlightStackFrameAction extends ObjectActionDelegate {
+
+	@Override
+	public void run(IAction action) {
+		// Make sure there is a current selection
+		IStructuredSelection selection = getCurrentSelection();
+		if (selection == null) {
+			return;
+		}
+
+		final var stackFrameCategorizer = JDIDebugUIPlugin.getDefault().getStackFrameCategorizer();
+		final var types = new HashSet<String>();
+		final var threads = new HashSet<IThread>();
+		for (Object selected : selection) {
+			if (selected instanceof IJavaStackFrame frame) {
+				try {
+					types.add(frame.getDeclaringTypeName());
+				} catch (DebugException e) {
+					JDIDebugUIPlugin.log(e);
+				}
+				threads.add(frame.getThread());
+			}
+		}
+		stackFrameCategorizer.addTypesToActiveCustomFilters(types);
+		for (IThread thread : threads) {
+			try {
+				for (IStackFrame frame : thread.getStackFrames()) {
+					if (frame instanceof IJavaStackFrame javaFrame) {
+						javaFrame.resetCategory();
+					}
+				}
+			} catch (DebugException e) {
+				JDIDebugUIPlugin.log(e);
+			}
+		}
+
+	}
+
+}