Support precise lambda highlighting for inline chained lambdas

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

@@ -1737,7 +1737,16 @@ private static void toggleLambdaBreakpoint(IWorkbenchPart part, ITextSelection t
 		}
 	}
 
-	private static List<LambdaExpression> findLambdaExpressions(ITextEditor editor, IRegion region) {
+	/**
+	 * Finds lambda expressions within the given region of the editor.
+	 *
+	 * @param editor
+	 *            the text editor to search
+	 * @param region
+	 *            the region in which lambda expressions should be collected
+	 * @return a list of lambda expressions found in the region, or an empty list if none are found
+	 */
+	public static List<LambdaExpression> findLambdaExpressions(ITextEditor editor, IRegion region) {
 		LambdaCollector lambdas = new LambdaCollector(region.getOffset(), region.getOffset() + region.getLength());
 		CompilationUnit unitForLambdas = parseCompilationUnit(editor);
 		if (unitForLambdas == null) {

org.eclipse.jdt.debug.ui/ui/org/eclipse/jdt/internal/debug/ui/sourcelookup/JavaDebugShowInAdapterFactory.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2006, 2015 IBM Corporation and others.
+ * Copyright (c) 2006, 2025 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
@@ -14,10 +14,13 @@
 package org.eclipse.jdt.internal.debug.ui.sourcelookup;
 
 import org.eclipse.core.runtime.IAdapterFactory;
+import org.eclipse.debug.core.DebugException;
+import org.eclipse.debug.internal.ui.DebugUIPlugin;
 import org.eclipse.debug.internal.ui.sourcelookup.SourceLookupFacility;
 import org.eclipse.debug.ui.sourcelookup.ISourceDisplay;
 import org.eclipse.jdt.debug.core.IJavaStackFrame;
 import org.eclipse.jdt.internal.debug.core.model.GroupedStackFrame;
+import org.eclipse.jdt.internal.debug.core.model.JDIStackFrame;
 import org.eclipse.ui.part.IShowInSource;
 import org.eclipse.ui.part.IShowInTargetList;
 
@@ -43,14 +46,22 @@ public <T> T getAdapter(Object adaptableObject, Class<T> adapterType) {
 				return (T) new StackFrameShowInTargetListAdapter();
 			}
 		}
+
 		if (adapterType == ISourceDisplay.class) {
 			if (adaptableObject instanceof GroupedStackFrame groupedFrames) {
 				return (T) (ISourceDisplay) (element, page, forceSourceLookup) -> {
 					var frame = groupedFrames.getTopMostFrame();
 					SourceLookupFacility.getDefault().displaySource(frame, page, forceSourceLookup);
 				};
 			}
-
+			try {
+				if (adaptableObject instanceof JDIStackFrame jdiFrame
+						&& org.eclipse.jdt.internal.debug.core.model.LambdaUtils.isLambdaFrame(jdiFrame)) {
+					return (T) new LambdaStackFrameSourceDisplayAdapter();
+				}
+			} catch (DebugException e) {
+				DebugUIPlugin.log(e);
+			}
 		}
 		return null;
 	}

org.eclipse.jdt.debug.ui/ui/org/eclipse/jdt/internal/debug/ui/sourcelookup/LambdaStackFrameSourceDisplayAdapter.java

@@ -0,0 +1,73 @@
+/*******************************************************************************
+ * Copyright (c) 2025 IBM Corporation.
+ *
+ * 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:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.jdt.internal.debug.ui.sourcelookup;
+
+import java.util.List;
+
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.debug.internal.ui.DebugUIPlugin;
+import org.eclipse.debug.internal.ui.sourcelookup.SourceLookupFacility;
+import org.eclipse.debug.internal.ui.sourcelookup.SourceLookupResult;
+import org.eclipse.debug.ui.sourcelookup.ISourceDisplay;
+import org.eclipse.jdt.core.IJavaElement;
+import org.eclipse.jdt.core.dom.IMethodBinding;
+import org.eclipse.jdt.core.dom.LambdaExpression;
+import org.eclipse.jdt.internal.debug.core.model.JDIStackFrame;
+import org.eclipse.jdt.internal.debug.ui.actions.ToggleBreakpointAdapter;
+import org.eclipse.jdt.ui.JavaUI;
+import org.eclipse.jface.text.BadLocationException;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.IRegion;
+import org.eclipse.ui.IEditorInput;
+import org.eclipse.ui.IEditorPart;
+import org.eclipse.ui.IWorkbenchPage;
+import org.eclipse.ui.texteditor.IDocumentProvider;
+import org.eclipse.ui.texteditor.ITextEditor;
+
+/**
+ * @since 3.2
+ */
+public class LambdaStackFrameSourceDisplayAdapter implements ISourceDisplay {
+
+	@Override
+	public void displaySource(Object element, IWorkbenchPage page, boolean forceSourceLookup) {
+		JDIStackFrame jdiFrame = (JDIStackFrame) element;
+		try {
+			SourceLookupResult sourceRes = SourceLookupFacility.getDefault().lookup(element, jdiFrame.getLaunch().getSourceLocator(), forceSourceLookup);
+			IDocumentProvider provider = JavaUI.getDocumentProvider();
+			IEditorInput editorInput = sourceRes.getEditorInput();
+			provider.connect(editorInput);
+			IDocument document = provider.getDocument(editorInput);
+			IRegion region = document.getLineInformation(jdiFrame.getLineNumber() - 1);
+			IJavaElement je = JavaUI.getEditorInputJavaElement(editorInput);
+			if (je != null) {
+				IEditorPart part = JavaUI.openInEditor(je);
+				if (part instanceof ITextEditor textEditor) {
+					List<LambdaExpression> inLineLambdas = ToggleBreakpointAdapter.findLambdaExpressions(textEditor, region);
+					for (LambdaExpression exp : inLineLambdas) {
+						IMethodBinding methodBinding = exp.resolveMethodBinding();
+						String key = methodBinding.getKey();
+						if (key.contains(jdiFrame.getName())) {
+							textEditor.selectAndReveal(exp.getStartPosition(), exp.getLength());
+							return;
+						}
+					}
+				}
+			}
+		} catch (CoreException | BadLocationException e) {
+			DebugUIPlugin.log(e);
+		}
+		SourceLookupFacility.getDefault().displaySource(jdiFrame, page, forceSourceLookup);
+	}
+}