Class: Twostroke::Runtime::Types::Object

Inherits:
Value
  • Object
show all
Defined in:
lib/twostroke/runtime/types/object.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Value

#has_instance

Constructor Details

#initialize ⇒ Object

Returns a new instance of Object.



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# File 'lib/twostroke/runtime/types/object.rb', line 6

def initialize
  @extensible = true
  @properties = {}
  @accessors = {}
  @prototype ||= defined?(@@_prototype) ? @@_prototype : Null.new
  @_class = self.class.constructor_function if !defined?(@_class) && self.class.respond_to?(:constructor_function)
  @data = {} # for abitrary data not safe to store as a property
  proto_put "constructor", @_class
end

Instance Attribute Details

#_class ⇒ Object

Returns the value of attribute _class.



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# File 'lib/twostroke/runtime/types/object.rb', line 3

def _class
  @_class
end

#accessors ⇒ Object (readonly)

Returns the value of attribute accessors.



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# File 'lib/twostroke/runtime/types/object.rb', line 4

def accessors
  @accessors
end

#data ⇒ Object (readonly)

Returns the value of attribute data.



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# File 'lib/twostroke/runtime/types/object.rb', line 4

def data
  @data
end

#extensible ⇒ Object (readonly)

Returns the value of attribute extensible.



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# File 'lib/twostroke/runtime/types/object.rb', line 4

def extensible
  @extensible
end

#properties ⇒ Object (readonly)

Returns the value of attribute properties.



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# File 'lib/twostroke/runtime/types/object.rb', line 4

def properties
  @properties
end

#prototype ⇒ Object

Returns the value of attribute prototype.



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# File 'lib/twostroke/runtime/types/object.rb', line 3

def prototype
  @prototype
end

Class Method Details

.set_global_prototype(proto) ⇒ Object 



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# File 'lib/twostroke/runtime/types/object.rb', line 20

def self.set_global_prototype(proto)
  @@_prototype = proto
end

Instance Method Details

#can_put(prop) ⇒ Object 



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# File 'lib/twostroke/runtime/types/object.rb', line 104

def can_put(prop)
  extensible && (!accessors.has_key?(prop) || accessors[prop][:configurable])
end

#construct(opts = {}) ⇒ Object 



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# File 'lib/twostroke/runtime/types/object.rb', line 42

def construct(opts = {})
  @constructing = true
  opts.each do |k,v|
    if respond_to? "#{k}="
      send "#{k}=", v
    else
      instance_variable_set "@#{k}", v
    end
  end
  yield if block_given?
  @constructing = false
end

#constructing? ⇒ Boolean

Returns:



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# File 'lib/twostroke/runtime/types/object.rb', line 28

def constructing?
  @constructing
end

#default_value(hint = nil) ⇒ Object 



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# File 'lib/twostroke/runtime/types/object.rb', line 136

def default_value(hint = nil)      
  if hint.nil?
    # @TODO
    # hint = is_a?(Date) ? "String" : "Number"
    hint = "Number"
  end
  
  if hint == "String"
    toString = get "toString"
    if toString.respond_to? :call
      str = toString.call(nil, self, [])
      return str if str.is_a? Primitive
    end
    valueOf = get "valueOf"
    if valueOf.respond_to? :call
      val = valueOf.call(nil, self, [])
      return val if val.is_a? Primitive
    end
    Twostroke::Runtime::Lib.throw_type_error "could not convert object to string"
  elsif hint == "Number"
    valueOf = get "valueOf"
    if valueOf.respond_to? :call
      val = valueOf.call(nil, self, [])
      return val if val.is_a? Primitive
    end
    toString = get "toString"
    if toString.respond_to? :call
      str = toString.call(nil, self, [])
      return str if str.is_a? Primitive
    end
    Twostroke::Runtime::Lib.throw_type_error "could not convert object to string"
  end
end

#define_own_property(prop, descriptor) ⇒ Object 



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# File 'lib/twostroke/runtime/types/object.rb', line 170

def define_own_property(prop, descriptor)
  unless descriptor.has_key?(:get) || descriptor.has_key?(:set)
    descriptor[:get] = ->(this) { descriptor[:value] }
    descriptor[:set] = ->(this, value) { descriptor[:value] = value }
    descriptor[:value] ||= Undefined.new
  else
    descriptor[:writable] = true if descriptor.has_key?(:set)
  end
  accessors[prop] = descriptor
end

#delete(prop) ⇒ Object 



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# File 'lib/twostroke/runtime/types/object.rb', line 120

def delete(prop)
  if accessors.has_key? prop
    accessors.delete prop if accessors[prop][:configurable]
  elsif prop != "prototype"
    properties.delete prop
  end
end

#delete!(prop) ⇒ Object 



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# File 'lib/twostroke/runtime/types/object.rb', line 128

def delete!(prop)
  if accessors.has_key? prop
    accessors.delete prop if accessors[prop][:configurable]
  else
    properties.delete prop
  end
end

#each_enumerable_property(&bk) ⇒ Object 



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# File 'lib/twostroke/runtime/types/object.rb', line 79

def each_enumerable_property(&bk)
  accessors.select { |k,v| v[:enumerable] }.each { |k,v| yield k }
  properties.reject { |k,v| accessors[k] }.each { |k,v| yield k }
  if prototype && prototype.is_a?(Object)
    prototype.each_enumerable_property &bk
  end
end

#generic_items ⇒ Object

this allows us to treat the object like a generic array. the value of this method is not memoized, so call sparingly



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# File 'lib/twostroke/runtime/types/object.rb', line 34

def generic_items
  return items if respond_to? :items
  len = Twostroke::Runtime::Types.to_number(get "length").number
  return [] if (len.is_a?(Float) && (len.nan? || len.infinite?)) || len < 0
  len = len.to_i
  (0...len).map { |i| get i.to_s }
end

#get(prop, this = self) ⇒ Object 



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# File 'lib/twostroke/runtime/types/object.rb', line 55

def get(prop, this = self)
  if accessors.has_key? prop
    accessors[prop][:get].(this)
  elsif properties.has_key? prop
    properties[prop]
  else
    prototype && prototype.is_a?(Object) ? prototype.get(prop, this) : Undefined.new
  end
end

#get_own_property(prop) ⇒ Object 



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# File 'lib/twostroke/runtime/types/object.rb', line 65

def get_own_property(prop)
  if accessors.has_key? prop
    accessors[prop][:get] ? accessors[prop][:get].(this) : Undefined.new
  elsif properties.has_key? prop
    properties[prop]
  else
    Undefined.new
  end
end

#get_property(prop) ⇒ Object 



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# File 'lib/twostroke/runtime/types/object.rb', line 75

def get_property(prop)
  # @TODO?
end

#has_accessor(prop) ⇒ Object 



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# File 'lib/twostroke/runtime/types/object.rb', line 112

def has_accessor(prop)
  accessors.has_key?(prop)
end

#has_own_property(prop) ⇒ Object 



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# File 'lib/twostroke/runtime/types/object.rb', line 116

def has_own_property(prop)
  accessors.has_key?(prop) || properties.has_key?(prop)
end

#has_property(prop) ⇒ Object 



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# File 'lib/twostroke/runtime/types/object.rb', line 108

def has_property(prop)
  accessors.has_key?(prop) || properties.has_key?(prop) || (prototype && prototype.is_a?(Object) && prototype.has_property(prop))
end

#proto_put(prop, value) ⇒ Object

puts prop as a non-enumerable property



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# File 'lib/twostroke/runtime/types/object.rb', line 100

def proto_put(prop, value)
  define_own_property prop, value: value, enumerable: false
end

#put(prop, value, this = self) ⇒ Object 



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# File 'lib/twostroke/runtime/types/object.rb', line 87

def put(prop, value, this = self)
  if accessors.has_key? prop
    accessors[prop][:set].(this, value) if accessors[prop][:set] && accessors[prop][:writable]
  elsif properties.has_key? prop
    properties[prop] = value
#      elsif prototype && prototype.is_a?(Object) && prototype.has_accessor(prop)
#        prototype.put prop, value, this
  else
    properties[prop] = value
  end
end

#typeof ⇒ Object 



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# File 'lib/twostroke/runtime/types/object.rb', line 24

def typeof
  "object"
end