CSS lang pseudo-class matching should be case-insensitive

[Carl Hoffman]

Section 5.11.4 of the CSS 2.1 specification reads "The matching of C against the element's language value is performed case-insensitively." Both Chrome and Firefox operate this way.

In Inkscape 0.48, the tag <text class="abc" lang="JA"> will match the selector text.abc:lang(JA) but not the selector text.abc:lang(ja).

[Martin Owens (doctormo)]

This is an outstanding error in libcroco which is still there in upstream 0.6.8, I've patched our version of the code in revision 12887 to do a case-insensitive match on the lang pseudo-class.

I'm attaching my test file which contains three text elements. The first 'Lower case' is green, the second is 'Jap' is a false-positive indicator while the bottom 'Upper case' is the false-negative reported here and is red before the patch and green after it.

[Alex Valavanis (valavanisalex)]

@Martin - Is this bug in the upstream croco tracker? We should really forward the patch to them.

[Alex Valavanis (valavanisalex)]

Here's the current bug-list for libcroco:

https://bugzilla.gnome.org/buglist.cgi?product=libcroco&bug_status=UNCONFIRMED&bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&component=General

[Martin Owens (doctormo)]

Bug reported upstream: https://bugzilla.gnome.org/show_bug.cgi?id=721806