Class: Kwartz::CssStyleParser

Inherits:
PresentationLogicParser show all
Defined in:
lib/kwartz/parser.rb

Overview

css style presentation logic parser

example of presentation logic in css style:

/* comment */
#idname, .classname, tagname {
  value:   @var;
  attrs:   "class" @classname, "bgcolro" color;
  append:  @value==item['list'] ? ' checked' : '';
  logic:   {
    @list.each { |item|
      _stag
      _cont
      _etag
    }
  }
}

Constant Summary

Constants inherited from PresentationLogicParser

PresentationLogicParser::ESCAPE_FLAG_TABLE, PresentationLogicParser::PLOGIC_KEYWORDS

Instance Attribute Summary collapse

Attributes inherited from PresentationLogicParser

#column, #error, #linenum, #pos, #token, #value

Instance Method Summary collapse

Methods inherited from PresentationLogicParser

#escape?, get_class, #getch, #parse_error, register_class, #scan, #scan_block, #scan_ident, #scan_line, #scan_string, #scan_string_dquoted, #scan_string_quoted

Methods included from Assertion

assert

Methods included from CharacterType

#is_alpha, #is_digit, #is_identchar, #is_whitespace

Constructor Details

#initialize(*args) ⇒ CssStyleParser

Returns a new instance of CssStyleParser.



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# File 'lib/kwartz/parser.rb', line 605

def initialize(*args)
  super
  @mode = :selector           # :selector or :declaration
end

Instance Attribute Details

#mode ⇒ Object

Returns the value of attribute mode.



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# File 'lib/kwartz/parser.rb', line 610

def mode
  @mode
end

Instance Method Details

#parse(input, filename = '') ⇒ Object 



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# File 'lib/kwartz/parser.rb', line 613

def parse(input, filename='')
  reset(input, filename)
  scan()
  rulesets = []
  while @token == :command     # '@import'
    command = @value
    case command
    when '@import'
      imported_rulesets = parse_import_command()
      rulesets += imported_rulesets
    when '@from'
      # TODO
    when '@import_pdata'
      # TODO
    else
      raise parse_error("#{command}: unsupported command.")
    end
  end
  while @token == :selector
    selectors = parse_selectors()
    unless @token == :'{'
      raise parse_error("'#{@value}': '{' is expected.")  #'
    end
    @mode = :declaration
    _linenum, _column = @linenum, @column
    ruleset = Ruleset.new(selectors)
    parse_declaration(ruleset)
    unless @token
      raise parse_error("'#{selectors.first}': is not closed by '}'.", _linenum, _column)
    end
    @mode = :selector
    rulesets << ruleset
    scan()
  end
  unless @token == nil
    raise parse_error("'#{@value}': selector is expected.")
  end
  return rulesets
end