Cell tools

[blink1073]

Fixes #902.

Notes about the raw metadata editor:

• When the user focuses the the raw metadata cell, it no longer updates with programmatic changes.
• If the user makes a change to the raw metadata, commit and revert buttons are shown above the text area.
• If the user blurs the text area without having made any changes, it is updated to reflect the current data.
• If the user blurs the text area having made changes, the buttons remain and the metadata is not updated.
• If the user cancels the changes, the area is updated to reflect the current data.
• If the user commits the changes, the metadata is merged, with the input data overriding any keys that were set programatically. Keys that were removed by the user are deleted.
• If the user has input invalid JSON, the box will be made red and the buttons will remain visible.

The raw metadata editor was written so that it could be used to edit notebook level metadata as well. Also, when we add metadata editing for multiple cells, we can use the Metadata.IOwner interface to abstract over all selected cells.

Raw cell:

Code cell (nbconvert selector is disabled):

Editing Metadata:

[blink1073]

@cameronoelsen, the bones are there, except for the handling of the cell metadata editing. I can't remember what we said we were going to do for that. I think we had said it would be a read-only text area, and double-clicking would bring up an editor.

[blink1073]

@afshin and I talked about this and propose the following behavior:

• When the user focuses the the raw metadata cell, it no longer updates with programmatic changes
• If the user makes a change to the raw metadata, commit and cancel buttons are shown above the text area
• If the user blurs the text area without having made any changes, it is updated to reflect the current data
• If the user blurs the text area having made changes, the buttons remain and the metadata is not updated.
• If the user cancels the changes, the area is updated to reflect the current data.
• If the user commits the changes, the metadata is merged, with the input data overriding any keys that were set programatically.
• If the user has input invalid JSON, the box will be made red and the buttons will remain visible

[ellisonbg]

@blink1073 can you show some screen shots that show the whole lab so we can see what the notebook looks like and the L panel looks like?

[blink1073]

@ellisonbg, updated.

[blink1073]

We agreed in the weekly dev meeting today to try out the approach above, moving the editor to the end and making it collapsed by default.

[blink1073]

Notes from discussion with @afshin this morning: we should use the Message system instead of signaling to notify the cell tools of changes, since they are hierarchical. Override the parent property to be a CellTools object.

[afshin]

Awesome, thanks! This is epic.

[jasongrout]

👏!