Copy on Select ignore trailing whitespaces

[david50407]

Description of the new feature/enhancement

While copying on select, auto ignore trailing whitespaces on each line.

Why?

In my .vimrc, I draw 80 column and 120 column line via background color like this:

function! SetColumnWarnOnResized()
  highlight Normal ctermbg=NONE
  if &columns > 120
    let &colorcolumn="81,".join(range(120, &columns), ",") " Set the column warns on 80 and 120+
  else
    let &colorcolumn="81" " Set the column warns on 80
  endif
endfunction
au VimResized * call SetColumnWarnOnResized()
call SetColumnWarnOnResized()     

When I select and copy these words in the screenshot above, Windows Terminal will fill my clipboard with many whitespaces like this (notice that wired whitespaces):

Some texts here...
And here...                                                                                                                                                         Notice the 80 col line in my vim --------------------------------------------->
And the 120 col line ================================================================================================>       

And this only happend sometimes (not always), I don't know if this is a bug?

Related issues

This issues may relatives to these issues:

• Copying text still includes white space instead of newlines #2944
• WSL Terminal Line Endings (the "exact wrap" bug) #3088

[zadjii-msft]

Huh. The nearly-exact wrapping there is really curious.

[DHowett]

This could be related to vim printing the entire row of text when it wants to apply a style to the 81st+ columns. We can't meaningfully know the difference between it wanting text over there and it wanting spaces over there. Hmm.

[david50407]

Hummm... So the workaround is not to print background on the last column.

But other terminals like gnome terminal (on Linux) and PuTTY (on Windows) can handle this well without trailing whitespaces, is there any technological issue?