Class: RubyRunJs::JsArray

Inherits:
JsBaseObject show all
Defined in:
lib/ruby_run_js/objects/js_array.rb

Instance Attribute Summary

Attributes inherited from JsBaseObject

#_class, #extensible, #own, #prototype, #value

Instance Method Summary collapse

Methods inherited from JsBaseObject

#_type, #can_put, #default_value, #delete, #get, #get_items, #get_own_property, #get_property, #has_property, #put, #set_items

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

Constructor Details

#initialize(length, prototype) ⇒ JsArray

Returns a new instance of JsArray.



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# File 'lib/ruby_run_js/objects/js_array.rb', line 7

def initialize(length, prototype)
  super()
  @prototype = prototype
  @own['length'] = {
    'value' => length.to_f,
    'writable' => true,
    'enumerable' => false,
    'configurable' => false
  }
  @_class = 'Array'
end

Instance Method Details

#define_own_property(prop_name, prop_desc, throw = false) ⇒ Object 



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# File 'lib/ruby_run_js/objects/js_array.rb', line 19

def define_own_property(prop_name, prop_desc, throw = false)
  reject = proc {
    if throw
      raise make_error('TypeError', 'Could not define own property for array')
    end
    return false
  }
  oldLenDesc = get_own_property('length')
  oldLen = oldLenDesc['value']
  if prop_name == 'length'
    unless prop_desc.key?('value')
      return super
    end
    newLenDesc = prop_desc.clone
    newLen = to_uint32(prop_desc['value'])
    if newLen != to_number(prop_desc['value'])
      raise make_error('RangeError', 'Invalid range')
    end
    newLenDesc['value'] = newLen.to_f
    if newLen >= oldLen
      return super(prop_name, newLenDesc, throw)
    end
    unless oldLenDesc['writable']
      reject.call
    end
    if !newLenDesc.key?('writable') || newLenDesc['writable']
      newWritable = true
    else
      newWritable = false
      newLenDesc['writable'] = true
    end
    succeeded = super('length', newLenDesc, throw)
    return false unless succeeded
    while newLen < oldLen
      oldLen -= 1
      deleteSucceeded = delete(to_string(oldLen),false)
      unless deleteSucceeded
        newLenDesc['value'] = oldLen + 1
        unless newWritable
          newLenDesc['writable'] = false
        end
        super('length',newLenDesc,false)
        reject.call
      end
    end
    unless newWritable
      super('length',{'writable' => false}, false)
    end
    return true
  elsif prop_name == to_string(to_uint32(prop_name)) && to_uint32(prop_name) != 2**32 - 1
    index = to_uint32(prop_name)
    if index >= oldLen && !oldLenDesc['writable']
      reject.call
    end
    unless super(prop_name, prop_desc, false)
      reject.call
    end
    if index >= oldLen
      oldLenDesc['value'] = (index + 1).to_f
      super('length', oldLenDesc, false)
    end
    return true
  else
    return super
  end
end