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Merge pull request #120 from rubychan/sass-scanner
Sass scanner
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,207 @@ | ||
| module CodeRay | ||
| module Scanners | ||
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| # A scanner for Sass. | ||
| class Sass < CSS | ||
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| register_for :sass | ||
| file_extension 'sass' | ||
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| SASS_FUNCTION = /(?:inline-image|linear-gradient|color-stops|mix|lighten|darken|rotate|image-url|image-width|image-height|sprite-url|sprite-path|sprite-file|sprite-map|sprite-position|sprite|unquote|join|round|ceil|floor|nth)/ | ||
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| STRING_CONTENT_PATTERN = { | ||
| "'" => /(?:[^\n\'\#]+|\\\n|#{RE::Escape}|#(?!\{))+/, | ||
| '"' => /(?:[^\n\"\#]+|\\\n|#{RE::Escape}|#(?!\{))+/, | ||
| } | ||
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| protected | ||
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| def setup | ||
| @state = :initial | ||
| end | ||
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| def scan_tokens encoder, options | ||
| states = Array(options[:state] || @state) | ||
| string_delimiter = nil | ||
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| until eos? | ||
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| if match = scan(/\s+/) | ||
| encoder.text_token match, :space | ||
| value_expected = false if match.index(/\n/) | ||
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| elsif states.last == :sass_inline && (match = scan(/\}/)) | ||
| encoder.text_token match, :inline_delimiter | ||
| encoder.end_group :inline | ||
| states.pop | ||
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| 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 | ||
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| 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 | ||
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| 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 | ||
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| else | ||
| #:nocov: | ||
| raise_inspect 'Unknown state', encoder | ||
| #:nocov: | ||
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| end | ||
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| elsif match = scan(/\$#{RE::Ident}/o) | ||
| encoder.text_token match, :variable | ||
| next | ||
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| elsif match = scan(/&/) | ||
| encoder.text_token match, :local_variable | ||
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| elsif match = scan(/\+#{RE::Ident}/o) | ||
| encoder.text_token match, :include | ||
| value_expected = true | ||
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| elsif match = scan(/\/\*(?:.*?\*\/|.*)|\/\/.*/) | ||
| encoder.text_token match, :comment | ||
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| elsif match = scan(/#\{/) | ||
| encoder.begin_group :inline | ||
| encoder.text_token match, :inline_delimiter | ||
| states.push :sass_inline | ||
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| elsif match = scan(/\{/) | ||
| value_expected = false | ||
| encoder.text_token match, :operator | ||
| states.push :block | ||
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| elsif match = scan(/\}/) | ||
| value_expected = false | ||
| encoder.text_token match, :operator | ||
| if states.last == :block || states.last == :media | ||
| states.pop | ||
| end | ||
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| elsif match = scan(/['"]/) | ||
| encoder.begin_group :string | ||
| string_delimiter = match | ||
| encoder.text_token match, :delimiter | ||
| if states.include? :sass_inline | ||
| content = scan_until(/(?=#{string_delimiter}|\}|\z)/) | ||
| encoder.text_token content, :content unless content.empty? | ||
| encoder.text_token string_delimiter, :delimiter if scan(/#{string_delimiter}/) | ||
| encoder.end_group :string | ||
| else | ||
| states.push :string | ||
| end | ||
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| elsif match = scan(/#{SASS_FUNCTION}/o) | ||
| encoder.text_token match, :predefined | ||
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| 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 | ||
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| elsif match = scan(/(?: #{RE::Dimension} | #{RE::Percentage} | #{RE::Num} )/ox) | ||
| encoder.text_token match, :float | ||
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| elsif match = scan(/#{RE::HexColor}/o) | ||
| encoder.text_token match, :color | ||
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| elsif match = scan(/! *(?:important|optional)/) | ||
| encoder.text_token match, :important | ||
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| elsif match = scan(/(?:rgb|hsl)a?\([^()\n]*\)?/) | ||
| encoder.text_token match, :color | ||
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| elsif match = scan(/@else if\b|#{RE::AtKeyword}/) | ||
| encoder.text_token match, :directive | ||
| value_expected = true | ||
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| elsif match = scan(/ == | != | [-+*\/>~:;,.=()] /x) | ||
| if match == ':' | ||
| value_expected = true | ||
| elsif match == ';' | ||
| value_expected = false | ||
| end | ||
| encoder.text_token match, :operator | ||
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| else | ||
| encoder.text_token getch, :error | ||
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| end | ||
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| end | ||
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| if options[:keep_state] | ||
| @state = states | ||
| end | ||
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| encoder | ||
| end | ||
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| end | ||
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| end | ||
| end |
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