csslib does not support escaping within strings

[skoga]

What steps will reproduce the problem?

Consider parsing the following:

.foo {
  desc: "I'm cool";
}

.bar {
  desc: "I\000027m hot";
}

According to the W3c spec (http://www.w3.org/TR/css3-syntax/#escaping) Both of the above strings are legit and should result in the visitor calling visitLiteralTerm with the the string "I'm hot" or "I'm cold" (as appropriate).

However, visitLiteralTerm comes back with the string "I\000027m hot" and (escaped dart string) and "I\000027m cold". So it looks like some kind of translation occurs but it's not in the correct direction.

What version of the product are you using?

csslib 0.9.2

On what operating system?

linux

What browser (if applicable)?

server-side (n/a)

Please provide any additional information below.

[skoga]

I should note that something of the form

.baz {
  desc: "I'm bad"
}

should be parsed correctly from my reading of the syntax spec, but it will fail to parse in csslib. This will parse correctly in sass, btw.

[sethladd]

cc @terrylucas.
Added Pkg-Csslib, Area-Pkg, Triaged labels.

[DartBot]

This issue has been moved to dart-lang/csslib#11.