[patch] Support for CSS Level 2 :lang pseudo-function

[Thiago Macieira]

Hello,

while Konqueror is supporting some Level 3 constructs, its Level 2 
support is not complete. Among the missing ones is the :lang modifier 
(see http://www.w3.org/TR/REC-CSS2/selector.html#lang)

In any event, I had come up with patches to do that a while ago, but 
they were somewhat buggy. Here's another attempt:

css/css_base.h: add an "arg" argument that can be used by all CSS 
pseudo-function modifiers, including the existing :not()

css/parser.y, css/cssparser.cpp and css/tokenizer.flex: make :not the 
special case, instead of the rule. Allow parsing of other parameters 
that aren't simpleSelectors.

css/cssstyleselector.cpp: adds the code for interpretation of :lang and 
modify :not to use the new argument construct.

Bugs: this is NOT XHTML compliant since KHTML does not parse the 
"xml:lang" attribute. If I modify misc/htmlattrs.in, add it and remove 
the #if 0 from cssstyleselector.cpp, it also starts working, but it's 
still not fully compliant (see the FIXME in the file).

However, since my gperf seems to be broken (it generates an inverse 
lookup table that points every attribute Id to "http-equiv"), I cannot 
test it. Besides, adding support for "xml:lang" right inside the 
standard HTML attributes is a hack. KHTML should be able to parse the 
xml: namespace on its own.

Attached is also a test file. You should see the second (and third for 
"xml:lang") paragraphs be yellow with this patch.

-- 
  Thiago Macieira  -  Registered Linux user #65028
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