How to enable float window to show diagnostic information temporarily for this line?

[wyg1997]

Is your feature request related to a problem? Please describe.

I set "diagnostic.messageTarget": "echo" in coc-setting.json, but sometimes I want to open float window to see detail information with diagnostic.

Describe the solution you'd like

Provide a CocAction or other way to open the diagnostic information for this line with a float window.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.

[fannheyward]

You can use :call CocAction('diagnosticPreview') to open the diagnostic info in Preview window (:help preview-window) .

:call CocActionAsync('diagnosticInfo') is used to show diagnostic info, but this is also following messageTarget.

[wyg1997]

Yes I have tried using CocAction('diagnosticPreview') but feel the display is not as good as the float window.

I installed some plugins which caused me to have too much diagnostic information, and using the float window by default caused a lot of trouble in development.

I don't know if there is a way to balance the advantages of both, so that I can summon the float window when I need it. May I ask if you think this is a necessary requirement?

[fannheyward]

some plugins which caused me to have too much diagnostic information

I didn't use any other plugins to show diagnostic in floating window, only one window on the diagnostic position.

A forward-compatible solution: add target param in CocActionAsync('diagnosticInfo', target), by default it's messageTarget, user can override the message showing.

[wyg1997]

A forward-compatible solution: add target param in CocActionAsync('diagnosticInfo', target), by default it's messageTarget, user can override the message showing.

I think this method is very flexible and convenient, and can perfectly meet my needs!