bug#34476: fluffy whitespace in the mode-line, despite it running off the screen

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

>> +      char c = ostring[i];
>> +      if (!(c == ' ' && prev == ' '))
>> +        {
>> +          *s++ = c;
>> +          prev = c;
>> +        }

[...]

> Ouch!  This is Lisp converted into C, yes?

If that looks like Lisp to you...  :-)

> And it formats the mode-line twice: once in format-mode-line, then
> again in display_string, right?

No, display_string just displays the string, I think?

> You don't need all this inelegance.  After display_mode_element
> returns, you have all the glyphs it produced in it.glyph_row, so you
> can simply remove the unneeded space glyphs from the glyph row (and
> adjust the metrics accordingly).  Let me know if you need more
> detailed help in how to do that.

That seems like a lot more work, I think?  And I don't see how that
could be more efficient than just removing the characters from the C
string?

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