Keybindings: provide some guidance on when-clause support

I find when clauses are one of the most powerful features in VSCode keybinding story, but we have only very limited support for understanding it from the product itself.

We very likely have duplicates already for supporting intellisense etc. for contexts, but at the very minimum can we at least somehow link to https://code.visualstudio.com/docs/getstarted/keybindings#_when-clause-contexts from the keybindings editor?

Maybe with some link in the table and maybe with an extra menu item close to the entry for “Change when expression”?

//cc @misolori @alexandrudima

[ArturoDent]

An example of my confusion: the new when-clause "when": "focusedView == nodeDependencies" (which hasn’t made it to https://code.visualstudio.com/docs/getstarted/keybindings#_when-clause-contexts yet). Are the only possible views those identified in that link?

workbench.view.explorer - File Explorer workbench.view.search - Search workbench.view.scm - Source Control workbench.view.debug - Debug workbench.view.extensions - Extensions

and nothing more? Except presumably extension-contributed views like nodeDependencies.

What is the outline in the explorer? It doesn’t seem to be a view or at least I couldn’t get it to work with focusedView. And what is the difference between a view and a viewlet?

[infokiller]

I also struggled with figuring out what conditions are available and what are their values in every context. I ended up debugging VSCode and storing the values which solved the issues I had, see here for details and a long list of available variables in when clauses for a few contexts: https://github.com/infokiller/config-public/tree/master/.config/Code/User/reference