Module: RubyRunJs::JsRegExpMethods

Extended by:
Helper
Defined in:
lib/ruby_run_js/object_methods/js_regexp.rb

Class Method Summary collapse

Methods included from Helper

check_object, get_member, get_member_dot, is_accessor_descriptor, is_callable, is_data_descriptor, is_generic_descriptor, is_primitive, make_error, strict_equality

Methods included from ConversionHelper

#convert_to_js_type, #to_boolean, #to_int32, #to_integer, #to_number, #to_object, #to_primitive, #to_string, #to_uint16, #to_uint32

Class Method Details

.check_regexp(obj) ⇒ Object 



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# File 'lib/ruby_run_js/object_methods/js_regexp.rb', line 79

def check_regexp(obj)
  unless this.js_type == :Object && this.js_class == 'RegExp'
    raise make_error('TypeError', 'Called on non-regexp object')
  end
end

.constructor(builtin, this, pattern, flags) ⇒ Object 



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# File 'lib/ruby_run_js/object_methods/js_regexp.rb', line 10

def constructor(builtin, this, pattern, flags)
  if pattern.js_class == 'RegExp' && flags == undefined
    return pattern
  end
  constructor_new(builtin, this, pattern, flags)
end

.constructor_new(builtin, this, pattern, flags) ⇒ Object 



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# File 'lib/ruby_run_js/object_methods/js_regexp.rb', line 17

def constructor_new(builtin, this, pattern, flags)
  if pattern.js_class == 'RegExp' && flags == undefined
    return pattern
  elsif pattern.js_class == 'RegExp' && flags != undefined
    raise make_error('TypeError', 'cannot construct RegExp with RegExp and flags')
  else
    pattern = pattern == undefined ? '' : to_string(pattern)
    flags = flags == undefined ? '' : to_string(flags)
  end

  flags.each_char do |c| 
    unless 'gim'.include?(c)
      raise make_error('SyntaxError', "Invalid flags supplied to RegExp constructor #{flags}")
    end
  end

  if flags.chars.to_set.length != flags.length
    raise make_error('SyntaxError', "Invalid flags supplied to RegExp constructor #{flags}")
  end

  builtin.new_regexp(pattern, flags)
end

.prototype_exec(builtin, this, string) ⇒ Object 



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# File 'lib/ruby_run_js/object_methods/js_regexp.rb', line 40

def prototype_exec(builtin, this, string)
  check_regexp(this)
  str = to_string(string)
  length = str.length
  last_index = this.get('lastIndex')
  i = to_integer(last_index)
  global = this.get('global')
  unless global
    i = 0
  end
  match_succeeded = false
  while !match_succeeded
    if i < 0 || i > length
      this.put('lastIndex', 0.0, true)
      return null
    end
    match_data = this.pattern.match(str, i)
    if match_data.nil?
      i += 1
    else
      match_succeeded = true
    end
  end
  e = match_data.end(0)
  if global
    this.put('lastIndex', e, true)
  end
  captures = match_data.captures
  result = builtin.new_array_with_items(captures)
  result.put('index', match_data.begin(0).to_f)
  result.put('input', str)
  result
end

.prototype_test(builtin, this, string) ⇒ Object 



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# File 'lib/ruby_run_js/object_methods/js_regexp.rb', line 74

def prototype_test(builtin, this, string)
  result = prototype_exec(builtin, this, string)
  result != null
end

.prototype_toString(builtin, this) ⇒ Object 



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# File 'lib/ruby_run_js/object_methods/js_regexp.rb', line 85

def prototype_toString(builtin, this)
  check_regexp(this)
  flags = ''
  if this.flag_global
    flags += 'g'
  end
  if this.flag_ignore_case
    flags += 'i'
  end
  if this.flag_multiline
    flags += 'm'
  end
  v = this.body == '' ? '(?:)' : this.body
  "/#{v}/#{flags}"
end