package otto
import (
"fmt"
)
// ======
// _stash
// ======
type _stash interface {
hasBinding(string) bool //
createBinding(string, bool, Value) // CreateMutableBinding
setBinding(string, Value, bool) // SetMutableBinding
getBinding(string, bool) Value // GetBindingValue
deleteBinding(string) bool //
setValue(string, Value, bool) // createBinding + setBinding
outer() _stash
runtime() *_runtime
newReference(string, bool, _at) _reference
clone(clone *_clone) _stash
}
// ==========
// _objectStash
// ==========
type _objectStash struct {
_runtime *_runtime
_outer _stash
object *_object
}
func (self *_objectStash) runtime() *_runtime {
return self._runtime
}
func (runtime *_runtime) newObjectStash(object *_object, outer _stash) *_objectStash {
if object == nil {
object = runtime.newBaseObject()
object.class = "environment"
}
return &_objectStash{
_runtime: runtime,
_outer: outer,
object: object,
}
}
func (in *_objectStash) clone(clone *_clone) _stash {
out, exists := clone.objectStash(in)
if exists {
return out
}
*out = _objectStash{
clone.runtime,
clone.stash(in._outer),
clone.object(in.object),
}
return out
}
func (self *_objectStash) hasBinding(name string) bool {
return self.object.hasProperty(name)
}
func (self *_objectStash) createBinding(name string, deletable bool, value Value) {
if self.object.hasProperty(name) {
panic(hereBeDragons())
}
mode := _propertyMode(0111)
if !deletable {
mode = _propertyMode(0110)
}
// TODO False?
self.object.defineProperty(name, value, mode, false)
}
func (self *_objectStash) setBinding(name string, value Value, strict bool) {
self.object.put(name, value, strict)
}
func (self *_objectStash) setValue(name string, value Value, throw bool) {
if !self.hasBinding(name) {
self.createBinding(name, true, value) // Configurable by default
} else {
self.setBinding(name, value, throw)
}
}
func (self *_objectStash) getBinding(name string, throw bool) Value {
if self.object.hasProperty(name) {
return self.object.get(name)
}
if throw { // strict?
panic(self._runtime.panicReferenceError("Not Defined", name))
}
return Value{}
}
func (self *_objectStash) deleteBinding(name string) bool {
return self.object.delete(name, false)
}
func (self *_objectStash) outer() _stash {
return self._outer
}
func (self *_objectStash) newReference(name string, strict bool, at _at) _reference {
return newPropertyReference(self._runtime, self.object, name, strict, at)
}
// =========
// _dclStash
// =========
type _dclStash struct {
_runtime *_runtime
_outer _stash
property map[string]_dclProperty
}
type _dclProperty struct {
value Value
mutable bool
deletable bool
readable bool
}
func (runtime *_runtime) newDeclarationStash(outer _stash) *_dclStash {
return &_dclStash{
_runtime: runtime,
_outer: outer,
property: map[string]_dclProperty{},
}
}
func (in *_dclStash) clone(clone *_clone) _stash {
out, exists := clone.dclStash(in)
if exists {
return out
}
property := make(map[string]_dclProperty, len(in.property))
for index, value := range in.property {
property[index] = clone.dclProperty(value)
}
*out = _dclStash{
clone.runtime,
clone.stash(in._outer),
property,
}
return out
}
func (self *_dclStash) hasBinding(name string) bool {
_, exists := self.property[name]
return exists
}
func (self *_dclStash) runtime() *_runtime {
return self._runtime
}
func (self *_dclStash) createBinding(name string, deletable bool, value Value) {
_, exists := self.property[name]
if exists {
panic(fmt.Errorf("createBinding: %s: already exists", name))
}
self.property[name] = _dclProperty{
value: value,
mutable: true,
deletable: deletable,
readable: false,
}
}
func (self *_dclStash) setBinding(name string, value Value, strict bool) {
property, exists := self.property[name]
if !exists {
panic(fmt.Errorf("setBinding: %s: missing", name))
}
if property.mutable {
property.value = value
self.property[name] = property
} else {
self._runtime.typeErrorResult(strict)
}
}
func (self *_dclStash) setValue(name string, value Value, throw bool) {
if !self.hasBinding(name) {
self.createBinding(name, false, value) // NOT deletable by default
} else {
self.setBinding(name, value, throw)
}
}
// FIXME This is called a __lot__
func (self *_dclStash) getBinding(name string, throw bool) Value {
property, exists := self.property[name]
if !exists {
panic(fmt.Errorf("getBinding: %s: missing", name))
}
if !property.mutable && !property.readable {
if throw { // strict?
panic(self._runtime.panicTypeError())
}
return Value{}
}
return property.value
}
func (self *_dclStash) deleteBinding(name string) bool {
property, exists := self.property[name]
if !exists {
return true
}
if !property.deletable {
return false
}
delete(self.property, name)
return true
}
func (self *_dclStash) outer() _stash {
return self._outer
}
func (self *_dclStash) newReference(name string, strict bool, _ _at) _reference {
return &_stashReference{
name: name,
base: self,
}
}
// ========
// _fnStash
// ========
type _fnStash struct {
_dclStash
arguments *_object
indexOfArgumentName map[string]string
}
func (runtime *_runtime) newFunctionStash(outer _stash) *_fnStash {
return &_fnStash{
_dclStash: _dclStash{
_runtime: runtime,
_outer: outer,
property: map[string]_dclProperty{},
},
}
}
func (in *_fnStash) clone(clone *_clone) _stash {
out, exists := clone.fnStash(in)
if exists {
return out
}
dclStash := in._dclStash.clone(clone).(*_dclStash)
index := make(map[string]string, len(in.indexOfArgumentName))
for name, value := range in.indexOfArgumentName {
index[name] = value
}
*out = _fnStash{
_dclStash: *dclStash,
arguments: clone.object(in.arguments),
indexOfArgumentName: index,
}
return out
}
func getStashProperties(stash _stash) (keys []string) {
switch vars := stash.(type) {
case *_dclStash:
for k := range vars.property {
keys = append(keys, k)
}
case *_fnStash:
for k := range vars.property {
keys = append(keys, k)
}
case *_objectStash:
for k := range vars.object.property {
keys = append(keys, k)
}
default:
panic("unknown stash type")
}
return
}
