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package otto
import (
"strconv"
"unicode/utf8"
)
type _stringObject interface {
Length() int
At(int) rune
String() string
}
type _stringASCII string
func (str _stringASCII) Length() int {
return len(str)
}
func (str _stringASCII) At(at int) rune {
return rune(str[at])
}
func (str _stringASCII) String() string {
return string(str)
}
type _stringWide struct {
string string
length int
runes []rune
}
func (str _stringWide) Length() int {
return str.length
}
func (str _stringWide) At(at int) rune {
if str.runes == nil {
str.runes = []rune(str.string)
}
return str.runes[at]
}
func (str _stringWide) String() string {
return str.string
}
func _newStringObject(str string) _stringObject {
for i := 0; i < len(str); i++ {
if str[i] >= utf8.RuneSelf {
goto wide
}
}
return _stringASCII(str)
wide:
return &_stringWide{
string: str,
length: utf8.RuneCountInString(str),
}
}
func stringAt(str _stringObject, index int) rune {
if 0 <= index && index < str.Length() {
return str.At(index)
}
return utf8.RuneError
}
func (runtime *_runtime) newStringObject(value Value) *_object {
str := _newStringObject(value.string())
self := runtime.newClassObject("String")
self.defineProperty("length", toValue_int(str.Length()), 0, false)
self.objectClass = _classString
self.value = str
return self
}
func (self *_object) stringValue() _stringObject {
if str, ok := self.value.(_stringObject); ok {
return str
}
return nil
}
func stringEnumerate(self *_object, all bool, each func(string) bool) {
if str := self.stringValue(); str != nil {
length := str.Length()
for index := 0; index < length; index++ {
if !each(strconv.FormatInt(int64(index), 10)) {
return
}
}
}
objectEnumerate(self, all, each)
}
func stringGetOwnProperty(self *_object, name string) *_property {
if property := objectGetOwnProperty(self, name); property != nil {
return property
}
// TODO Test a string of length >= +int32 + 1?
if index := stringToArrayIndex(name); index >= 0 {
if chr := stringAt(self.stringValue(), int(index)); chr != utf8.RuneError {
return &_property{toValue_string(string(chr)), 0}
}
}
return nil
}
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