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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
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