package otto
// property
type _propertyMode int
const (
modeWriteMask _propertyMode = 0700
modeEnumerateMask = 0070
modeConfigureMask = 0007
modeOnMask = 0111
modeOffMask = 0000
modeSetMask = 0222 // If value is 2, then mode is neither "On" nor "Off"
)
type _propertyGetSet [2]*_object
var _nilGetSetObject _object = _object{}
type _property struct {
value interface{}
mode _propertyMode
}
func (self _property) writable() bool {
return self.mode&modeWriteMask == modeWriteMask&modeOnMask
}
func (self *_property) writeOn() {
self.mode = (self.mode & ^modeWriteMask) | (modeWriteMask & modeOnMask)
}
func (self *_property) writeOff() {
self.mode &= ^modeWriteMask
}
func (self *_property) writeClear() {
self.mode = (self.mode & ^modeWriteMask) | (modeWriteMask & modeSetMask)
}
func (self _property) writeSet() bool {
return 0 == self.mode&modeWriteMask&modeSetMask
}
func (self _property) enumerable() bool {
return self.mode&modeEnumerateMask == modeEnumerateMask&modeOnMask
}
func (self *_property) enumerateOn() {
self.mode = (self.mode & ^modeEnumerateMask) | (modeEnumerateMask & modeOnMask)
}
func (self *_property) enumerateOff() {
self.mode &= ^modeEnumerateMask
}
func (self _property) enumerateSet() bool {
return 0 == self.mode&modeEnumerateMask&modeSetMask
}
func (self _property) configurable() bool {
return self.mode&modeConfigureMask == modeConfigureMask&modeOnMask
}
func (self *_property) configureOn() {
self.mode = (self.mode & ^modeConfigureMask) | (modeConfigureMask & modeOnMask)
}
func (self *_property) configureOff() {
self.mode &= ^modeConfigureMask
}
func (self _property) configureSet() bool {
return 0 == self.mode&modeConfigureMask&modeSetMask
}
func (self _property) copy() *_property {
property := self
return &property
}
func (self _property) get(this *_object) Value {
switch value := self.value.(type) {
case Value:
return value
case _propertyGetSet:
if value[0] != nil {
return value[0].call(toValue(this), nil, false, nativeFrame)
}
}
return Value{}
}
func (self _property) isAccessorDescriptor() bool {
setGet, test := self.value.(_propertyGetSet)
return test && (setGet[0] != nil || setGet[1] != nil)
}
func (self _property) isDataDescriptor() bool {
if self.writeSet() { // Either "On" or "Off"
return true
}
value, valid := self.value.(Value)
return valid && !value.isEmpty()
}
func (self _property) isGenericDescriptor() bool {
return !(self.isDataDescriptor() || self.isAccessorDescriptor())
}
func (self _property) isEmpty() bool {
return self.mode == 0222 && self.isGenericDescriptor()
}
// _enumerableValue, _enumerableTrue, _enumerableFalse?
// .enumerableValue() .enumerableExists()
func toPropertyDescriptor(rt *_runtime, value Value) (descriptor _property) {
objectDescriptor := value._object()
if objectDescriptor == nil {
panic(rt.panicTypeError())
}
{
descriptor.mode = modeSetMask // Initially nothing is set
if objectDescriptor.hasProperty("enumerable") {
if objectDescriptor.get("enumerable").bool() {
descriptor.enumerateOn()
} else {
descriptor.enumerateOff()
}
}
if objectDescriptor.hasProperty("configurable") {
if objectDescriptor.get("configurable").bool() {
descriptor.configureOn()
} else {
descriptor.configureOff()
}
}
if objectDescriptor.hasProperty("writable") {
if objectDescriptor.get("writable").bool() {
descriptor.writeOn()
} else {
descriptor.writeOff()
}
}
}
var getter, setter *_object
getterSetter := false
if objectDescriptor.hasProperty("get") {
value := objectDescriptor.get("get")
if value.IsDefined() {
if !value.isCallable() {
panic(rt.panicTypeError())
}
getter = value._object()
getterSetter = true
} else {
getter = &_nilGetSetObject
getterSetter = true
}
}
if objectDescriptor.hasProperty("set") {
value := objectDescriptor.get("set")
if value.IsDefined() {
if !value.isCallable() {
panic(rt.panicTypeError())
}
setter = value._object()
getterSetter = true
} else {
setter = &_nilGetSetObject
getterSetter = true
}
}
if getterSetter {
if descriptor.writeSet() {
panic(rt.panicTypeError())
}
descriptor.value = _propertyGetSet{getter, setter}
}
if objectDescriptor.hasProperty("value") {
if getterSetter {
panic(rt.panicTypeError())
}
descriptor.value = objectDescriptor.get("value")
}
return
}
func (self *_runtime) fromPropertyDescriptor(descriptor _property) *_object {
object := self.newObject()
if descriptor.isDataDescriptor() {
object.defineProperty("value", descriptor.value.(Value), 0111, false)
object.defineProperty("writable", toValue_bool(descriptor.writable()), 0111, false)
} else if descriptor.isAccessorDescriptor() {
getSet := descriptor.value.(_propertyGetSet)
get := Value{}
if getSet[0] != nil {
get = toValue_object(getSet[0])
}
set := Value{}
if getSet[1] != nil {
set = toValue_object(getSet[1])
}
object.defineProperty("get", get, 0111, false)
object.defineProperty("set", set, 0111, false)
}
object.defineProperty("enumerable", toValue_bool(descriptor.enumerable()), 0111, false)
object.defineProperty("configurable", toValue_bool(descriptor.configurable()), 0111, false)
return object
}
