Use MultiPageEditorPart for getting active editor in ClipboardReplace

Author: SougandhS

team/bundles/org.eclipse.compare/compare/org/eclipse/compare/internal/ClipboardReplace.java

@@ -31,7 +31,7 @@
 import org.eclipse.ui.IFileEditorInput;
 import org.eclipse.ui.IWorkbenchPage;
 import org.eclipse.ui.PlatformUI;
-import org.eclipse.ui.forms.editor.FormEditor;
+import org.eclipse.ui.part.MultiPageEditorPart;
 import org.eclipse.ui.texteditor.ITextEditor;
 
 public class ClipboardReplace extends BaseCompareAction {
@@ -43,8 +43,11 @@ protected void run(ISelection selection) {
 			try {
 				IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
 				IEditorPart editor = page.getActiveEditor();
-				if (editor instanceof FormEditor fromEditor) {
-					editor = fromEditor.getActiveEditor();
+				if (editor instanceof MultiPageEditorPart mpe) {
+					Object page2 = mpe.getSelectedPage();
+					if (page2 instanceof IEditorPart e) {
+						editor = e;
+					}
 				}
 				IEditorInput input = editor.getEditorInput();
 				if (input instanceof IFileEditorInput ed) {