jupyter: notebook appears to be stuck loading (when using raw view) #4265
Description
- Open any Jupyter notebook.
- In the view menu, select "Show notebook as... Raw .ipynb (file)"
- Close the notebook.
- Open it again and see this "Loading" spinner forever:
The reason is because the part of the store containing this raw view isn't initially set, and is actually only updated if that menu item is actively selected.
WORKAROUND: Select anything from the "Show notebook as..." submenu.
Fix: If the component sees that the raw file isn't available, call an action to compute it.
Related work: I should move this raw view functionality to a separate frame (not the body of the notebook). A related problem is that this raw view doesn't get updated as the document changes, so we also need to do make that happen, precisely when this frame is being displayed.