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package otto
import (
"fmt"
)
type _functionObject struct {
call _callFunction
construct _constructFunction
}
func (self _functionObject) source(object *_object) string {
return self.call.Source(object)
}
func (self0 _functionObject) clone(clone *_clone) _functionObject {
return _functionObject{
clone.callFunction(self0.call),
self0.construct,
}
}
func (runtime *_runtime) newNativeFunctionObject(name string, native _nativeFunction, length int) *_object {
self := runtime.newClassObject("Function")
self.value = _functionObject{
call: newNativeCallFunction(native),
construct: defaultConstructFunction,
}
self.defineProperty("length", toValue_int(length), 0000, false)
return self
}
func (runtime *_runtime) newBoundFunctionObject(target *_object, this Value, argumentList []Value) *_object {
self := runtime.newClassObject("Function")
self.value = _functionObject{
call: newBoundCallFunction(target, this, argumentList),
construct: newBoundConstructFunction(target),
}
length := int(toInt32(target.get("length")))
length -= len(argumentList)
if length < 0 {
length = 0
}
self.defineProperty("length", toValue_int(length), 0000, false)
self.defineProperty("caller", UndefinedValue(), 0000, false) // TODO Should throw a TypeError
self.defineProperty("arguments", UndefinedValue(), 0000, false) // TODO Should throw a TypeError
return self
}
func (runtime *_runtime) newBoundFunction(target *_object, this Value, argumentList []Value) *_object {
self := runtime.newBoundFunctionObject(target, this, argumentList)
self.prototype = runtime.Global.FunctionPrototype
prototype := runtime.newObject()
self.defineProperty("prototype", toValue_object(prototype), 0100, false)
prototype.defineProperty("constructor", toValue_object(self), 0100, false)
return self
}
func (self *_object) functionValue() _functionObject {
value, _ := self.value.(_functionObject)
return value
}
func (self *_object) Call(this Value, argumentList ...interface{}) Value {
if self.functionValue().call == nil {
panic(newTypeError("%v is not a function", toValue_object(self)))
}
return self.runtime.Call(self, this, self.runtime.toValueArray(argumentList...), false)
// ... -> runtime -> self.Function.Call.Dispatch -> ...
}
func (self *_object) Construct(this Value, argumentList ...interface{}) Value {
function := self.functionValue()
if function.call == nil {
panic(newTypeError("%v is not a function", toValue_object(self)))
}
if function.construct == nil {
panic(newTypeError("%v is not a constructor", toValue_object(self)))
}
return function.construct(self, this, self.runtime.toValueArray(argumentList...))
}
func defaultConstructFunction(self *_object, this Value, argumentList []Value) Value {
newObject := self.runtime.newObject()
newObject.class = "Object"
prototypeValue := self.get("prototype")
if !prototypeValue.IsObject() {
prototypeValue = toValue_object(self.runtime.Global.ObjectPrototype)
}
newObject.prototype = prototypeValue._object()
newObjectValue := toValue_object(newObject)
result := self.Call(newObjectValue, argumentList)
if result.IsObject() {
return result
}
return newObjectValue
}
func (self *_object) callGet(this Value) Value {
return self.runtime.Call(self, this, []Value(nil), false)
}
func (self *_object) callSet(this Value, value Value) {
self.runtime.Call(self, this, []Value{value}, false)
}
// 15.3.5.3
func (self *_object) HasInstance(of Value) bool {
if self.functionValue().call == nil {
// We should not have a HasInstance method
panic(newTypeError())
}
if !of.IsObject() {
return false
}
prototype := self.get("prototype")
if !prototype.IsObject() {
panic(newTypeError())
}
prototypeObject := prototype._object()
value := of._object().prototype
for value != nil {
if value == prototypeObject {
return true
}
value = value.prototype
}
return false
}
type _nativeFunction func(FunctionCall) Value
// _constructFunction
type _constructFunction func(*_object, Value, []Value) Value
// _callFunction
type _callFunction interface {
Dispatch(*_object, *_functionEnvironment, *_runtime, Value, []Value, bool) Value
Source(*_object) string
ScopeEnvironment() _environment
clone(clone *_clone) _callFunction
}
// _nativeCallFunction
type _nativeCallFunction struct {
name string
function _nativeFunction
}
func newNativeCallFunction(native _nativeFunction) _nativeCallFunction {
return _nativeCallFunction{"", native}
}
func (self _nativeCallFunction) Dispatch(_ *_object, _ *_functionEnvironment, runtime *_runtime, this Value, argumentList []Value, evalHint bool) Value {
return self.function(FunctionCall{
runtime: runtime,
evalHint: evalHint,
This: this,
ArgumentList: argumentList,
Otto: runtime.Otto,
})
}
func (self _nativeCallFunction) ScopeEnvironment() _environment {
return nil
}
func (self _nativeCallFunction) Source(*_object) string {
return fmt.Sprintf("function %s() { [native code] }", self.name)
}
func (self0 _nativeCallFunction) clone(clone *_clone) _callFunction {
return self0
}
// _boundCallFunction
type _boundCallFunction struct {
target *_object
this Value
argumentList []Value
}
func newBoundCallFunction(target *_object, this Value, argumentList []Value) *_boundCallFunction {
self := &_boundCallFunction{
target: target,
this: this,
argumentList: argumentList,
}
return self
}
func (self _boundCallFunction) Dispatch(_ *_object, _ *_functionEnvironment, runtime *_runtime, this Value, argumentList []Value, _ bool) Value {
argumentList = append(self.argumentList, argumentList...)
return runtime.Call(self.target, self.this, argumentList, false)
}
func (self _boundCallFunction) ScopeEnvironment() _environment {
return nil
}
func (self _boundCallFunction) Source(*_object) string {
return ""
}
func (self0 _boundCallFunction) clone(clone *_clone) _callFunction {
return _boundCallFunction{
target: clone.object(self0.target),
this: clone.value(self0.this),
argumentList: clone.valueArray(self0.argumentList),
}
}
func newBoundConstructFunction(target *_object) _constructFunction {
// This is not exactly as described in 15.3.4.5.2, we let [[Call]] supply the
// bound arguments, etc.
return func(self *_object, this Value, argumentList []Value) Value {
switch value := target.value.(type) {
case _functionObject:
return value.construct(self, this, argumentList)
}
panic(newTypeError())
}
}
// FunctionCall{}
// FunctionCall is an encapsulation of a JavaScript function call.
type FunctionCall struct {
runtime *_runtime
_thisObject *_object
evalHint bool
This Value
ArgumentList []Value
Otto *Otto
}
// Argument will return the value of the argument at the given index.
//
// If no such argument exists, undefined is returned.
func (self FunctionCall) Argument(index int) Value {
return valueOfArrayIndex(self.ArgumentList, index)
}
func (self FunctionCall) getArgument(index int) (Value, bool) {
return getValueOfArrayIndex(self.ArgumentList, index)
}
func (self FunctionCall) slice(index int) []Value {
if index < len(self.ArgumentList) {
return self.ArgumentList[index:]
}
return []Value{}
}
func (self *FunctionCall) thisObject() *_object {
if self._thisObject == nil {
this := self.runtime.GetValue(self.This) // FIXME Is this right?
self._thisObject = self.runtime.toObject(this)
}
return self._thisObject
}
func (self *FunctionCall) thisClassObject(class string) *_object {
thisObject := self.thisObject()
if thisObject.class != class {
panic(newTypeError())
}
return self._thisObject
}
func (self FunctionCall) toObject(value Value) *_object {
return self.runtime.toObject(value)
}
|
