Class: EPUB::CFI::Parser

Inherits:
Racc::Parser
  • Object
show all
Includes:
Comparable
Defined in:
lib/epub/cfi/parser.rb,
lib/epub/cfi/parser.tab.rb

Constant Summary collapse

UNICODE_CHARACTER_EXCLUDING_SPECIAL_CHARS_AND_SPACE_AND_DOT_AND_COLON_AND_TILDE_AND_ATMARK_AND_SOLIDUS_AND_EXCLAMATION_MARK_PATTERN =

excluding special chars and space(\u0020) and dot(\u002E) and colon(\u003A) and tilde(\u007E) and atmark(\u0040) and solidus(\u002F) and exclamation mark(\u0021)

/\u0009|\u000A|\u000D|[\u0022-\u0027]|[\u002A-\u002B]|\u002D|[\u0030-\u0039]|\u003C|[\u003E-\u0040]|[\u0041-\u005A]|\u005C|[\u005F-\u007D]|[\u007F-\uD7FF]|[\uE000-\uFFFD]|[\u10000-\u10FFFF]/
UNICODE_CHARACTER_PATTERN = 
Regexp.union(UNICODE_CHARACTER_EXCLUDING_SPECIAL_CHARS_AND_SPACE_AND_DOT_AND_COLON_AND_TILDE_AND_ATMARK_AND_SOLIDUS_AND_EXCLAMATION_MARK_PATTERN, Regexp.new(Regexp.escape(EPUB::CFI::SPECIAL_CHARS), / \.:~@!/))
Racc_arg = 
[
racc_action_table,
racc_action_check,
racc_action_default,
racc_action_pointer,
racc_goto_table,
racc_goto_check,
racc_goto_default,
racc_goto_pointer,
racc_nt_base,
racc_reduce_table,
racc_token_table,
racc_shift_n,
racc_reduce_n,
racc_use_result_var ]
Racc_token_to_s_table = 
[
"$end",
"error",
"COMMA",
"EXCLAMATION_MARK",
"SOLIDUS",
"COLON",
"TILDE",
"ATMARK",
"DIGIT_NON_ZERO",
"ZERO",
"DOT",
"SEMICOLON",
"EQUAL",
"CIRCUMFLEX",
"OPENING_SQUARE_BRACKET",
"CLOSING_SQUARE_BRACKET",
"OPENING_PARENTHESIS",
"CLOSING_PARENTHESIS",
"SPACE",
"UNICODE_CHARACTER_EXCLUDING_SPECIAL_CHARS_AND_SPACE_AND_DOT_AND_COLON_AND_TILDE_AND_ATMARK_AND_SOLIDUS_AND_EXCLAMATION_MARK",
"$start",
"fragment",
"path",
"range_zero_or_one",
"range",
"step",
"local_path",
"step_zero_or_more",
"redirected_path",
"offset_zero_or_one",
"offset",
"integer",
"assertion_part_zero_or_one",
"spatial_offset",
"number",
"spatial_offset_zero_or_one",
"opening_square_bracket",
"assertion",
"closing_square_bracket",
"digit_zero_or_more",
"fractional_portion_zero_or_one",
"fractional_portion",
"digit",
"value_csv_one_or_two",
"parameter_zero_or_more",
"value",
"parameter",
"value_no_space",
"csv",
"string_escaped_special_chars",
"string_escaped_special_chars_excluding_space",
"escaped_special_chars",
"square_brackets",
"parentheses",
"character_escaped_special",
"character_excluding_special_chars",
"character_escaped_special_excluding_space",
"character_excluding_special_chars_and_space",
"character_excluding_special_chars_and_space_and_dot_and_colon_and_tilde_and_atmark_and_solidus_and_exclamation_mark" ]
Racc_debug_parser = 
false

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(debug: false) ⇒ Parser 



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# File 'lib/epub/cfi/parser.rb', line 15

def initialize(debug: false)
  @yydebug = debug
  super()
end

Class Method Details

.parse(string, debug: false) ⇒ Object 



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# File 'lib/epub/cfi/parser.rb', line 10

def parse(string, debug: false)
  new(debug: debug).parse(string)
end

Instance Method Details

#_reduce_none(val, _values, result) ⇒ Object

reduce 80 omitted



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# File 'lib/epub/cfi/parser.tab.rb', line 692

def _reduce_none(val, _values, result)
  val[0]
end

#next_token ⇒ Object 



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# File 'lib/epub/cfi/parser.rb', line 73

def next_token
  @q.shift
end

#parse(string) ⇒ Object 



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# File 'lib/epub/cfi/parser.rb', line 20

def parse(string)
  if string.start_with? 'epubcfi('
    string = string['epubcfi('.length .. -2]
  end
  @scanner = StringScanner.new(string, true)
  @q = []
  until @scanner.eos?
    case
    when @scanner.scan(/[1-9]/)
      @q << [:DIGIT_NON_ZERO, @scanner[0]]
    when @scanner.scan(/0/)
      @q << [:ZERO, @scanner[0]]
    when @scanner.scan(/ /)
      @q << [:SPACE, @scanner[0]]
    when @scanner.scan(/\^/)
      @q << [:CIRCUMFLEX, @scanner[0]]
    when @scanner.scan(/\[/)
      @q << [:OPENING_SQUARE_BRACKET, @scanner[0]]
    when @scanner.scan(/\]/)
      @q << [:CLOSING_SQUARE_BRACKET, @scanner[0]]
    when @scanner.scan(/\(/)
      @q << [:OPENING_PARENTHESIS, @scanner[0]]
    when @scanner.scan(/\)/)
      @q << [:CLOSING_PARENTHESIS, @scanner[0]]
    when @scanner.scan(/,/)
      @q << [:COMMA, @scanner[0]]
    when @scanner.scan(/;/)
      @q << [:SEMICOLON, @scanner[0]]
    when @scanner.scan(/=/)
      @q << [:EQUAL, @scanner[0]]
    when @scanner.scan(/\./)
      @q << [:DOT, @scanner[0]]
    when @scanner.scan(/:/)
      @q << [:COLON, @scanner[0]]
    when @scanner.scan(/~/)
      @q << [:TILDE, @scanner[0]]
    when @scanner.scan(/@/)
      @q << [:ATMARK, @scanner[0]]
    when @scanner.scan(/\//)
      @q << [:SOLIDUS, @scanner[0]]
    when @scanner.scan(/!/)
      @q << [:EXCLAMATION_MARK, @scanner[0]]
    when @scanner.scan(UNICODE_CHARACTER_EXCLUDING_SPECIAL_CHARS_AND_SPACE_AND_DOT_AND_COLON_AND_TILDE_AND_ATMARK_AND_SOLIDUS_AND_EXCLAMATION_MARK_PATTERN)
      @q << [:UNICODE_CHARACTER_EXCLUDING_SPECIAL_CHARS_AND_SPACE_AND_DOT_AND_COLON_AND_TILDE_AND_ATMARK_AND_SOLIDUS_AND_EXCLAMATION_MARK, @scanner[0]]
    else
      raise 'unexpected character'
    end
  end
  @q << [false, false]

  do_parse
end