Support minimal context menu for text selected within extension README

[gjsjohnmurray]

The README for my extension includes several text fragments designed for copying into settings.json. But when I highlight the text and right-click on it, no context menu appears.

It turns out that the usual Ctrl+C key sequence (I'm testing on Windows) does copy the selection to the clipboard. But I wish the right-click would offer a context menu with a 'Copy' option.

[gjsjohnmurray]

@mjbvz now that you've closed #86658 maybe we can get this one tackled too. You tagged it 'help wanted', so I might take a look at it. Any pointers?

[mjbvz]

I've added cut, copy, and paste actions to the menu. We can consider adding additional actions based on demand (including potentially contributed ones #54285)

[rzhao271]

Reopening because it seems that copying using the context menu option doesn't get the text into the clipboard?

[rzhao271]

@mjbvz I'm still unable to copy-paste with the context menu.
I wonder if focus is being lost to the point where activeEditor isn't even set?

[JacksonKearl]

Works fine for me on macOS, confirmed still not working on windows.

[mjbvz]

Also seems to work for me on Windows: a62df5d

The fix I checked in yesterday was Windows and Linux specific. I believe it always worked on MacOS

[bpasero]

@mjbvz fyi we have a standard context menu that we show in all input fields:

I am not sure if you can detect whether the thing under the mouse is editable (= input field) or not and then show either this context menu or one with only things that work in readonly contexts (e.g. not "Cut").

[bpasero]

Verified for macOS. If you want cross OS coverage, I suggest a test plan item.