@jupyter-lsp/code-jumpers/lib/notebook_private.js

Implementation underlying the jump to definition functionality in JupyterLab-LSP

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
/**
 * Ensure that the notebook has proper focus.
 */
function _ensureFocus(notebook, force = false) {
    let activeCell = notebook.activeCell;
    if (notebook.mode === 'edit' && activeCell && activeCell.editor) {
        if (!activeCell.editor.hasFocus()) {
            activeCell.editor.focus();
        }
    }
    if (force && !notebook.node.contains(document.activeElement)) {
        notebook.node.focus();
    }
}
export { _ensureFocus };
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