[PATCH v2 (mentions of reverse mode eliminated)] Add style tui-cursorline command to colorize TUI current line.

[Andrew Burgess]

Andrei Pikas <gdb@mail.api.win> writes:

>  > I think I'd prefer a hyphen in there, since "cursorline" isn't a word.
>  > So, tui-cursor-line.  But why "cursor" and not "current"? "current
>  > line" seems to be the term used in the gdb manual.
>
> I chose this name to match vim for those who familiar with :set 
> cursorline. OK, I'll change it to tui-cursor-line. Or would you prefer 
> tui-current-line?
>
>
>
>  > Andrei> @@ -54,6 +54,28 @@ static const char * const cli_colors[] = {
>  > Andrei>    "magenta",
>  > Andrei>    "cyan",
>  > Andrei>    "white",
>  > Andrei> +  "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", 
> "18", "19", "20",
>  >
>  > What's this for?
>
> This is to support all 256 colors 
> https://www.ditig.com/256-colors-cheat-sheet . I want to use the 
> lightest shade of gray #255 for the background.

Thanks.  I've been playing with adding 256 colour support to GDB.

I think this change is big enough that it should be split into a
separate patch.  It certainly deserves its own NEWS entry, and probably
requires a docs update to indicate what all these (seemingly) random
numbers mean.

Thanks,
Andrew



>
>
>  > Andrei>      case '\n':
>  > Andrei> +          if (wattr_get (w, &w_attrs, &w_pair, nullptr) == OK)
>  > Andrei> +            /* Apply current style till the end of line. */
>  > Andrei> +            wchgat (w, -1, w_attrs, w_pair, nullptr);
>  >
>  > I don't think this is correct, because the source window may not extend
>  > to the end of the line.
>
> I tested for long line. It doesn't seem to be a problem (screenshot 
> https://drive.google.com/file/d/1lMgdR9cTNEQJAz05wO7TCgd3SVYOdXyP/view?usp=sharing 
> ).
>
> I think -1 handles this case: "A character count of -1 or greater than 
> the remaining window width means to change attributes all the way to the 
> end of the current line." from https://linux.die.net/man/3/wchgat
>
> I can rewrite this line as wchgat (w, std::max (0, getmaxx (w) - getcurx 
> (w)), w_attrs, w_pair, nullptr). But I think it's the same.