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path: root/vendor/github.com/robertkrimen/otto/type_go_slice.go
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package otto

import (
    "reflect"
    "strconv"
)

func (runtime *_runtime) newGoSliceObject(value reflect.Value) *_object {
    self := runtime.newObject()
    self.class = "GoArray" // TODO GoSlice?
    self.objectClass = _classGoSlice
    self.value = _newGoSliceObject(value)
    return self
}

type _goSliceObject struct {
    value reflect.Value
}

func _newGoSliceObject(value reflect.Value) *_goSliceObject {
    self := &_goSliceObject{
        value: value,
    }
    return self
}

func (self _goSliceObject) getValue(index int64) (reflect.Value, bool) {
    if index < int64(self.value.Len()) {
        return self.value.Index(int(index)), true
    }
    return reflect.Value{}, false
}

func (self _goSliceObject) setValue(index int64, value Value) bool {
    indexValue, exists := self.getValue(index)
    if !exists {
        return false
    }
    reflectValue, err := value.toReflectValue(self.value.Type().Elem().Kind())
    if err != nil {
        panic(err)
    }
    indexValue.Set(reflectValue)
    return true
}

func goSliceGetOwnProperty(self *_object, name string) *_property {
    // length
    if name == "length" {
        return &_property{
            value: toValue(self.value.(*_goSliceObject).value.Len()),
            mode:  0,
        }
    }

    // .0, .1, .2, ...
    index := stringToArrayIndex(name)
    if index >= 0 {
        value := Value{}
        reflectValue, exists := self.value.(*_goSliceObject).getValue(index)
        if exists {
            value = self.runtime.toValue(reflectValue.Interface())
        }
        return &_property{
            value: value,
            mode:  0110,
        }
    }

    // Other methods
    if method := self.value.(*_goSliceObject).value.MethodByName(name); (method != reflect.Value{}) {
        return &_property{
            value: self.runtime.toValue(method.Interface()),
            mode:  0110,
        }
    }

    return objectGetOwnProperty(self, name)
}

func goSliceEnumerate(self *_object, all bool, each func(string) bool) {
    object := self.value.(*_goSliceObject)
    // .0, .1, .2, ...

    for index, length := 0, object.value.Len(); index < length; index++ {
        name := strconv.FormatInt(int64(index), 10)
        if !each(name) {
            return
        }
    }

    objectEnumerate(self, all, each)
}

func goSliceDefineOwnProperty(self *_object, name string, descriptor _property, throw bool) bool {
    if name == "length" {
        return self.runtime.typeErrorResult(throw)
    } else if index := stringToArrayIndex(name); index >= 0 {
        if self.value.(*_goSliceObject).setValue(index, descriptor.value.(Value)) {
            return true
        }
        return self.runtime.typeErrorResult(throw)
    }
    return objectDefineOwnProperty(self, name, descriptor, throw)
}

func goSliceDelete(self *_object, name string, throw bool) bool {
    // length
    if name == "length" {
        return self.runtime.typeErrorResult(throw)
    }

    // .0, .1, .2, ...
    index := stringToArrayIndex(name)
    if index >= 0 {
        object := self.value.(*_goSliceObject)
        indexValue, exists := object.getValue(index)
        if exists {
            indexValue.Set(reflect.Zero(object.value.Type().Elem()))
            return true
        }
        return self.runtime.typeErrorResult(throw)
    }

    return self.delete(name, throw)
}