Support shortcut keys to display function help information

[cuixing158]

Is your feature request related to a problem? Please describe.
Currently, the latest extension cannot quickly display function help information like MATLAB Desktop does. For example, pressing the F1 shortcut key can briefly show the function’s syntax, the meaning of parameters, and hyperlinks to detailed information.

Describe the solution you'd like
I expect that this MATLAB extension for VS Code could make querying help as convenient and fast as in MATLAB Desktop, especially supporting this feature in both the editor and the MATLAB command window(integrated terminal in VS Code).

Describe alternatives you've considered
“I have to open a web page separately to search for the usage of a function

Additional context
None

[dklilley]

Thanks for the request!

We agree that this is a good feature to add. This would be resolved by implementing the Hover feature in LSP. With this implemented, the help text for a symbol would be displayed while hovering the cursor over the symbol in the document, or by using VS Code's Ctrl+K Ctrl+I shortcut.

[thefasquelle]

even more important to me is the ability to see this info while typing rather than after the fact. This would be the intellisense popups showed with Ctrl+Space when typing and automatically when entering arguments. Would it be covered also with the Hover feature ? These contain basically the same info but not always so I'm not sure.

[dklilley]

Hi @thefasquelle , can you clarify - are you asking for additional documentation in the popups which are displayed as part of tab completion/function signature help (as below)?

[thefasquelle]

@dklilley yes, but not only. My primary request is for more info in the intellisense popup while typing.
See these examples from the python extension

Typing the function:

Hovering

Typing arguments

notice how the all show basically the same complete doc.

Matlab's help is pretty light in comparison

and often it is simply non existent

So my request is, if you implement access to full doc with the Hover feature, please also make this full doc available in while-typing popups. And access to doc for the entire API where the Matlab IDE would show help on pressing F1.

[cuixing158]

@thefasquelle Thank you for refining and supplementing the example explanation.