suspending computer can result in golab silently failing to update files

[mpictor]

I tend to suspend my computer rather than shutting it off. I left golab open in my browser, and when I resumed I had to click the reconnect icon in the upper left. I edited a file that I had left open. It seemed to work - console output showed that packages were being rebuilt when I pressed ^s. However, behavior of the modified code did not change.

I didn't realize what the problem was until I opened the file in a text editor and found that the last changes were ones I made before putting my computer to sleep.

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I think an error should be displayed to the user if any OT transform fails to apply.

[mb0]

this seems to happen when the file was changed while the client was offline. however i think its not a failed transformation, but instead a naive reconnect implementation. reconnect must not only reconnect to the server but also to the document and update to the latest revision.

with a simple fix the client would replace the document with the latest version and loose offline editor changes.
the reconnect should show a warning and ask for confirmation to minimize any problems. the editor should also switch to read-only mode if there is a disconnect. it would basically do the same as a browser refresh, without loosing the list of tabs.

a diff view would be better but also way too much work for now.