Improve lambda breakpoint toggle (#146)

When not selecting the whole lambda expression, the codeSelect fails to
find the lambda method element. So instead of using the document
selection, we use the breakpoint locator location if that provides more
wider range.

Signed-off-by: Gayan Perera <[email protected]>

Author: gayanper

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

@@ -338,7 +338,8 @@ static IStatus doToggleLambdaMethodBreakpoints(IWorkbenchPart part, ISelection s
 			synchronized (unit) {
 				unit.reconcile(ICompilationUnit.NO_AST, false, null, null);
 			}
-			IJavaElement[] elements = unit.codeSelect(textSelection.getOffset(), textSelection.getLength());
+			IJavaElement[] elements = unit.codeSelect(Math.min(textSelection.getOffset(), loc.getMemberOffset()), Math.max(textSelection.getLength(), loc.getNodeLength()));
+
 			if (elements == null || elements.length == 0) {
 				ValidBreakpointLocationLocator locNew = new ValidBreakpointLocationLocator(loc.getCompilationUnit(), textSelection.getStartLine()
 						+ 1, true, true);