@Nullable
public static String newDocumentText(@NotNull final IpnbFilePanel ipnbPanel) {
final IpnbFile ipnbFile = ipnbPanel.getIpnbFile();
if (ipnbFile == null) return null;
for (IpnbEditablePanel panel : ipnbPanel.getIpnbPanels()) {
if (panel.isModified()) {
panel.updateCellSource();
}
}
final IpnbFileRaw fileRaw = new IpnbFileRaw();
fileRaw.metadata = ipnbFile.getMetadata();
if (ipnbFile.getNbformat() == 4) {
for (IpnbCell cell : ipnbFile.getCells()) {
fileRaw.cells.add(IpnbCellRaw.fromCell(cell, ipnbFile.getNbformat()));
}
} else {
final IpnbWorksheet worksheet = new IpnbWorksheet();
worksheet.cells.clear();
for (IpnbCell cell : ipnbFile.getCells()) {
worksheet.cells.add(IpnbCellRaw.fromCell(cell, ipnbFile.getNbformat()));
}
fileRaw.worksheets = new IpnbWorksheet[] {worksheet};
}
final StringWriter stringWriter = new StringWriter();
final JsonWriter writer = new JsonWriter(stringWriter);
writer.setIndent(" ");
gson.toJson(fileRaw, fileRaw.getClass(), writer);
return stringWriter.toString();
}
