David Brochart

Add constraints fore saving/reading files

2

### Problem Currently the default (async) file manager allows to [save](https://github.com/jupyter-server/jupyter_server/blob/3fbf07e57c33b6c536edec730601678fbab45188/jupyter_server/services/contents/filemanager.py#L941) a file and to [read](https://github.com/jupyter-server/jupyter_server/blob/3fbf07e57c33b6c536edec730601678fbab45188/jupyter_server/services/contents/filemanager.py#L880) it concurrently. If this happens, the read file content will probably not consist of...

Added TaskFactory cancel_all_tasks() and wait_all_tasks_finished()

2

This PR is an alternative to #115. Instead of cancelling/waiting for individual tasks, it creates a sub-task group that it can cancel and recreate. The drawback is that it adds...

Drop modelDB and use Yjs directly

15

### Problem JupyterLab has an abstraction layer called modelDB in the [observables](https://github.com/jupyterlab/jupyterlab/tree/fb2aff9cfbf5fa22f22038fdeccb53f677bdb5af/packages/observables) package, which currently serves as a proxy for the [Yjs shared types](https://docs.yjs.dev/api/shared-types). At the time real-time collaboration was...

Extra space when saved to SVG

3

Running the `DirectoryTree` widget [example](https://textual.textualize.io/widgets/directory_tree/#example) gives this:  But when saved to SVG with the command palette, an extra space is added:  ``` # Textual Diagnostics ## Versions |...

Allow a drive to support multiple document providers

3

### Problem Currently, file contents can be loaded at the drive level. For instance, the default drive allows loading files using the Jupyter Server REST API. Jupyter Collaboration swaps the...

Don't show a cell when notebook is empty

2

## Description JupyterLab shows an empty cell even when there is no cell in the `.ipynb` file. This is just a UI convenience, as the file is updated with the...