int (@NotNull Editor editor) { int availableVisualLines = 2; JComponent editorComponent = editor.getComponent(); Container editorComponentParent = editorComponent.getParent(); if (editorComponentParent != null) { JRootPane rootPane = editorComponent.getRootPane(); if (rootPane != null) { Container contentPane = rootPane.getContentPane(); if (contentPane != null) { int y = SwingUtilities.convertPoint(editorComponentParent, editorComponent.getLocation(), contentPane).y; int visualLines = y / editor.getLineHeight(); availableVisualLines = Math.max(availableVisualLines, visualLines); } } } return availableVisualLines; }