A module containing regular expressions used for lexing tokens in an SCSS document. Most of these are taken from [the CSS3 spec](www.w3.org/TR/css3-syntax/#lexical), although some have been modified for various reasons.
Custom
Defined in www.w3.org/TR/css3-selectors/#lex
This is more liberal than the spec's definition, but that definition didn't work well with the greediness rules
A unit is like an IDENT, but disallows a hyphen followed by a digit. This allows “1px-2px” to be interpreted as subtraction rather than “1” with the unit “px-2px”. It also allows “%”.
Defined in developer.mozilla.org/en/CSS/@-moz-document as a non-standard version of www.w3.org/TR/css3-conditional/
Escapes a single character for a CSS identifier.
@param c [String] The character to escape. Should have length 1 @return [String] The escaped character @private
# File lib/sass/scss/rx.rb, line 33 def self.escape_char(c) return "\\%06x" % Sass::Util.ord(c) unless c =~ /[ -\/:-~]/ "\\#{c}" end
Takes a string and returns a CSS identifier that will have the value of the given string.
@param str [String] The string to escape @return [String] The escaped string
# File lib/sass/scss/rx.rb, line 13 def self.escape_ident(str) return "" if str.empty? return "\\#{str}" if str == '-' || str == '_' out = "" value = str.dup out << value.slice!(0...1) if value =~ /^[-_]/ if value[0...1] =~ NMSTART out << value.slice!(0...1) else out << escape_char(value.slice!(0...1)) end out << value.gsub(/[^a-zA-Z0-9_-]/) {|c| escape_char c} out end
Creates a Regexp from a plain text string, escaping all significant characters.
@param str [String] The text of the regexp @param flags [Fixnum] Flags for the created regular expression @return [Regexp] @private
# File lib/sass/scss/rx.rb, line 45 def self.quote(str, flags = 0) Regexp.new(Regexp.quote(str), flags) end