diff options
Diffstat (limited to 'vendor/github.com/robertkrimen/otto/stash.go')
| -rw-r--r-- | vendor/github.com/robertkrimen/otto/stash.go | 296 |
1 files changed, 296 insertions, 0 deletions
diff --git a/vendor/github.com/robertkrimen/otto/stash.go b/vendor/github.com/robertkrimen/otto/stash.go new file mode 100644 index 000000000..0d3ffa511 --- /dev/null +++ b/vendor/github.com/robertkrimen/otto/stash.go @@ -0,0 +1,296 @@ +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 +} |