Class: CSSPool::LibCroco::CRTerm

Inherits:
FFI::Struct
  • Object
show all
Defined in:
lib/csspool/lib_croco/cr_term.rb

Instance Method Summary collapse

Instance Method Details

#to_term ⇒ Object 



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# File 'lib/csspool/lib_croco/cr_term.rb', line 19

def to_term
  operator = {
    0 => nil,
    1 => '/',
    2 => ','
  }[self[:operator]]

  unary_op = {
    0 => nil,
    1 => :plus,
    2 => :minus
  }[self[:unary_op]]

  case self[:type]
  when 0  # TERM_NO_TYPE
  when 1  # TERM_NUMBER
    num = CRNum.new(self[:content])
    CSSPool::Terms::Number.new(
      num[:type],
      unary_op,
      num[:value],
      operator,
      LibCroco.location_to_h(self)
    )
  when 2  # TERM_FUNCTION
    name = LibCroco.cr_string_peek_raw_str(self[:content]).read_string
    params = []
    term = self[:ext_content]
    until term.null?
      params << LibCroco::CRTerm.new(term)
      term = params.last[:next]
    end
    CSSPool::Terms::Function.new(
      name,
      params.map { |param| param.to_term },
      operator,
      LibCroco.location_to_h(self)
    )
  when 3  # TERM_STRING
    CSSPool::Terms::String.new(
      LibCroco.cr_string_peek_raw_str(self[:content]).read_string,
      operator,
      LibCroco.location_to_h(self)
    )
  when 4  # TERM_IDENT
    CSSPool::Terms::Ident.new(
      LibCroco.cr_string_peek_raw_str(self[:content]).read_string,
      operator,
      LibCroco.location_to_h(self)
    )
  when 5  # TERM_URI
    CSSPool::Terms::URI.new(
      LibCroco.cr_string_peek_raw_str(self[:content]).read_string,
      operator,
      LibCroco.location_to_h(self)
    )
  when 6  # TERM_RGB
    rgb = LibCroco::CRRgb.new(self[:content])
    CSSPool::Terms::Rgb.new(
      rgb[:red],
      rgb[:green],
      rgb[:blue],
      rgb[:is_percentage] == 1,
      operator,
      LibCroco.location_to_h(rgb)
    )
  when 7  # TERM_UNICODERANGE
    raise "libcroco doesn't seem to support this term"
  when 8  # TERM_HASH
    CSSPool::Terms::Hash.new(
      LibCroco.cr_string_peek_raw_str(self[:content]).read_string,
      operator,
      LibCroco.location_to_h(self)
    )
  end
end