otto/object.go

package otto

type _object struct {
	runtime *_runtime

	class       string
	objectClass *_objectClass
	value       interface{}

	prototype  *_object
	extensible bool

	property      map[string]_property
	propertyOrder []string
}

func newObject(runtime *_runtime, class string) *_object {
	self := &_object{
		runtime:     runtime,
		class:       class,
		objectClass: _classObject,
		property:    make(map[string]_property),
		extensible:  true,
	}
	return self
}

// 8.12

// 8.12.1
func (self *_object) getOwnProperty(name string) *_property {
	return self.objectClass.getOwnProperty(self, name)
}

// 8.12.2
func (self *_object) getProperty(name string) *_property {
	return self.objectClass.getProperty(self, name)
}

// 8.12.3
func (self *_object) get(name string) Value {
	return self.objectClass.get(self, name)
}

// 8.12.4
func (self *_object) canPut(name string) bool {
	return self.objectClass.canPut(self, name)
}

// 8.12.5
func (self *_object) put(name string, value Value, throw bool) {
	self.objectClass.put(self, name, value, throw)
}

// 8.12.6
func (self *_object) hasProperty(name string) bool {
	return self.objectClass.hasProperty(self, name)
}

func (self *_object) hasOwnProperty(name string) bool {
	return self.objectClass.hasOwnProperty(self, name)
}

type _defaultValueHint int

const (
	defaultValueNoHint _defaultValueHint = iota
	defaultValueHintString
	defaultValueHintNumber
)

// 8.12.8
func (self *_object) DefaultValue(hint _defaultValueHint) Value {
	if hint == defaultValueNoHint {
		if self.class == "Date" {
			// Date exception
			hint = defaultValueHintString
		} else {
			hint = defaultValueHintNumber
		}
	}
	methodSequence := []string{"valueOf", "toString"}
	if hint == defaultValueHintString {
		methodSequence = []string{"toString", "valueOf"}
	}
	for _, methodName := range methodSequence {
		method := self.get(methodName)
		if method.isCallable() {
			result := method._object().Call(toValue(self))
			if result.IsPrimitive() {
				return result
			}
		}
	}

	panic(newTypeError())
	return UndefinedValue()
}

func (self *_object) String() string {
	return toString(self.DefaultValue(defaultValueHintString))
}

func (self *_object) defineProperty(name string, value Value, mode _propertyMode, throw bool) bool {
	return self.defineOwnProperty(name, _property{value, mode}, throw)
}

// 8.12.9
func (self *_object) defineOwnProperty(name string, descriptor _property, throw bool) bool {
	return self.objectClass.defineOwnProperty(self, name, descriptor, throw)
}

func (self *_object) delete(name string, throw bool) bool {
	return self.objectClass.delete(self, name, throw)
}

func (self *_object) enumerate(all bool, each func(string)) {
	self.objectClass.enumerate(self, all, each)
}

func (self *_object) write(definition ...interface{}) {
	mode := _propertyMode(0111)
	length := 0
	nativeClass_ := "native" + self.class + "_"

	for index := 0; index < len(definition); index++ {
		value := definition[index]
		switch value := value.(type) {
		case _propertyMode:
			mode = value
		case string:
			name := value
			length = 0
			index += 1
		REPEAT:
			{
				value := definition[index]
				switch value := value.(type) {
				case func(FunctionCall) Value:
					{
						value := self.runtime.newNativeFunction(value, length, nativeClass_+name)
						self.defineProperty(name, toValue(value), mode, false)
					}
				case *_object:
					self.defineProperty(name, toValue(value), mode, false)
				case Value:
					self.defineProperty(name, value, mode, false)
				case int:
					length = value
					index += 1
					goto REPEAT
				default:
					panic(hereBeDragons())
				}
			}
		}
	}
}

func (self *_object) _exists(name string) bool {
	_, exists := self.property[name]
	return exists
}

func (self *_object) _read(name string) (_property, bool) {
	property, exists := self.property[name]
	return property, exists
}

func (self *_object) _write(name string, value interface{}, mode _propertyMode) {
	if value == nil {
		value = UndefinedValue()
	}
	_, exists := self.property[name]
	self.property[name] = _property{value, mode}
	if !exists {
		self.propertyOrder = append(self.propertyOrder, name)
	}
}

func (self *_object) _delete(name string) {
	_, exists := self.property[name]
	delete(self.property, name)
	if exists {
		for index, property := range self.propertyOrder {
			if name == property {
				if index == len(self.propertyOrder)-1 {
					self.propertyOrder = self.propertyOrder[:index]
				} else {
					self.propertyOrder = append(self.propertyOrder[:index], self.propertyOrder[index+1:]...)
				}
			}
		}
	}
}