@Override public void beforeDocumentChange(DocumentEvent event) { final Document document = event.getDocument(); final FileViewProvider viewProvider = getCachedViewProvider(document); if (viewProvider == null) return; if (!isRelevant(viewProvider)) return; VirtualFile virtualFile = viewProvider.getVirtualFile(); if (virtualFile.getFileType().isBinary()) return; final List<PsiFile> files = viewProvider.getAllFiles(); PsiFile psiCause = null; for (PsiFile file : files) { mySmartPointerManager.fastenBelts(file, event.getOffset(), null); if (TextBlock.get(file).isLocked()) { psiCause = file; } } if (psiCause == null) { beforeDocumentChangeOnUnlockedDocument(viewProvider); } ((SingleRootFileViewProvider) viewProvider).beforeDocumentChanged(psiCause); }