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Diffstat (limited to 'lib/coderay/scanners/sass.rb')
| -rw-r--r-- | lib/coderay/scanners/sass.rb | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/lib/coderay/scanners/sass.rb b/lib/coderay/scanners/sass.rb new file mode 100644 index 0000000..89d7737 --- /dev/null +++ b/lib/coderay/scanners/sass.rb @@ -0,0 +1,203 @@ +module CodeRay +module Scanners + + # A scanner for Sass. + class Sass < CSS + + register_for :sass + file_extension 'sass' + + SASS_FUNCTION = /(?:inline-image|linear-gradient|color-stops|mix|lighten|darken|rotate|image-url|image-width|image-height|sprite|sprite-url|sprite-path|sprite-file|sprite-map|sprite-position|unquote|join|round|ceil|floor|nth)/ + + STRING_CONTENT_PATTERN = { + "'" => /(?:[^\n\'\#]+|\\\n|#{RE::Escape}|#(?!\{))+/, + '"' => /(?:[^\n\"\#]+|\\\n|#{RE::Escape}|#(?!\{))+/, + } + + protected + + def setup + @state = :initial + @value_expected = false + end + + def scan_tokens encoder, options + states = Array(options[:state] || @state) + string_delimiter = nil + value_expected = @value_expected + + until eos? + + if match = scan(/\s+/) + encoder.text_token match, :space + value_expected = false if match.index(/\n/) + + elsif states.last == :sass_inline && (match = scan(/\}/)) + encoder.text_token match, :inline_delimiter + encoder.end_group :inline + states.pop + + elsif case states.last + when :initial, :media, :sass_inline + if match = scan(/(?>#{RE::Ident})(?!\()/ox) + encoder.text_token match, value_expected ? :value : (check(/.*:/) ? :key : :type) + next + elsif !value_expected && (match = scan(/\*/)) + encoder.text_token match, :type + next + elsif match = scan(RE::Class) + encoder.text_token match, :class + next + elsif match = scan(RE::Id) + encoder.text_token match, :constant + next + elsif match = scan(RE::PseudoClass) + encoder.text_token match, :pseudo_class + next + elsif match = scan(RE::AttributeSelector) + # TODO: Improve highlighting inside of attribute selectors. + encoder.text_token match[0,1], :operator + encoder.text_token match[1..-2], :attribute_name if match.size > 2 + encoder.text_token match[-1,1], :operator if match[-1] == ?] + next + elsif match = scan(/(\=|@mixin +)#{RE::Ident}/o) + encoder.text_token match, :function + next + elsif match = scan(/@media/) + encoder.text_token match, :directive + # states.push :media_before_name + next + end + + when :block + if match = scan(/(?>#{RE::Ident})(?!\()/ox) + if value_expected + encoder.text_token match, :value + else + encoder.text_token match, :key + end + next + end + + when :string + if match = scan(STRING_CONTENT_PATTERN[string_delimiter]) + encoder.text_token match, :content + elsif match = scan(/['"]/) + encoder.text_token match, :delimiter + encoder.end_group :string + string_delimiter = nil + states.pop + elsif match = scan(/#\{/) + encoder.begin_group :inline + encoder.text_token match, :inline_delimiter + states.push :sass_inline + elsif match = scan(/ \\ | $ /x) + encoder.end_group state + encoder.text_token match, :error unless match.empty? + states.pop + else + raise_inspect "else case #{string_delimiter} reached; %p not handled." % peek(1), encoder + end + + else + #:nocov: + raise_inspect 'Unknown state', encoder + #:nocov: + + end + + elsif match = scan(/\$#{RE::Ident}/o) + encoder.text_token match, :variable + next + + elsif match = scan(/&/) + encoder.text_token match, :local_variable + + elsif match = scan(/\+#{RE::Ident}/o) + encoder.text_token match, :include + value_expected = true + + elsif match = scan(/\/\*(?:.*?\*\/|.*)|\/\/.*/) + encoder.text_token match, :comment + + elsif match = scan(/#\{/) + encoder.begin_group :inline + encoder.text_token match, :inline_delimiter + states.push :sass_inline + + elsif match = scan(/\{/) + value_expected = false + encoder.text_token match, :operator + states.push :block + + elsif match = scan(/\}/) + value_expected = false + encoder.text_token match, :operator + if states.last == :block || states.last == :media + states.pop + end + + elsif match = scan(/['"]/) + encoder.begin_group :string + string_delimiter = match + encoder.text_token match, :delimiter + states.push :string + + elsif match = scan(/#{SASS_FUNCTION}/o) + encoder.text_token match, :predefined + + elsif match = scan(/#{RE::Function}/o) + encoder.begin_group :function + start = match[/^[-\w]+\(/] + encoder.text_token start, :delimiter + if match[-1] == ?) + encoder.text_token match[start.size..-2], :content + encoder.text_token ')', :delimiter + else + encoder.text_token match[start.size..-1], :content + end + encoder.end_group :function + + elsif match = scan(/(?: #{RE::Dimension} | #{RE::Percentage} | #{RE::Num} )/ox) + encoder.text_token match, :float + + elsif match = scan(/#{RE::HexColor}/o) + encoder.text_token match, :color + + elsif match = scan(/! *(?:important|optional)/) + encoder.text_token match, :important + + elsif match = scan(/(?:rgb|hsl)a?\([^()\n]*\)?/) + encoder.text_token match, :color + + elsif match = scan(/@else if\b|#{RE::AtKeyword}/) + encoder.text_token match, :directive + value_expected = true + + elsif match = scan(/ == | != | [-+*\/>~:;,.=()] /x) + if match == ':' + value_expected = true + elsif match == ';' + value_expected = false + end + encoder.text_token match, :operator + + else + encoder.text_token getch, :error + + end + + end + + if options[:keep_state] + @state = states + @value_expected = value_expected + end + + encoder + end + + end + +end +end |