// EvaluateScript evaluates the JavaScript code in script.
func (ctx *Context) EvaluateScript(script string, thisObject *Object, sourceURL string, startingLineNumber int) (*Value, error) {
scriptRef := NewString(script)
defer scriptRef.Release()
var sourceRef *String
if sourceURL != "" {
sourceRef = NewString(sourceURL)
defer sourceRef.Release()
}
if thisObject == nil {
thisObject = ctx.NewEmptyObject()
}
log.Println("About to evaluate script:", script, thisObject, sourceURL, startingLineNumber)
errVal := ctx.newErrorValue()
ret := C.JSEvaluateScript(ctx.ref,
C.JSStringRef(unsafe.Pointer(scriptRef)), thisObject.ref,
C.JSStringRef(unsafe.Pointer(sourceRef)), C.int(startingLineNumber), &errVal.ref)
if ret == nil {
// An error occurred
// Error information should be stored in exception
return nil, errVal
}
// Successful evaluation
return ctx.newValue(ret), nil
}
func (obj *Object) HasProperty(name string) bool {
jsstr := NewString(name)
defer jsstr.Release()
ret := C.JSObjectHasProperty(obj.ctx.ref, obj.ref, C.JSStringRef(unsafe.Pointer(jsstr)))
return bool(ret)
}
func (obj *Object) DeleteProperty(name string) (bool, error) {
jsstr := NewString(name)
defer jsstr.Release()
errVal := obj.ctx.newErrorValue()
ret := C.JSObjectDeleteProperty(obj.ctx.ref, obj.ref, C.JSStringRef(unsafe.Pointer(jsstr)), &errVal.ref)
if errVal.ref != nil {
return false, errVal
}
return bool(ret), nil
}
// CheckScriptSyntax checks the JavaScript syntax of script.
func (ctx *Context) CheckScriptSyntax(script string, sourceURL string, startingLineNumber int) error {
scriptRef := NewString(script)
defer scriptRef.Release()
var sourceRef *String
if sourceURL != "" {
sourceRef = NewString(sourceURL)
defer sourceRef.Release()
}
errVal := ctx.newErrorValue()
ret := C.JSCheckScriptSyntax(ctx.ref,
C.JSStringRef(unsafe.Pointer(scriptRef)), C.JSStringRef(unsafe.Pointer(sourceRef)),
C.int(startingLineNumber), &errVal.ref)
if !ret {
// A syntax error was found
// exception should be non-nil
return errVal
}
// exception should be nil
return nil
}
func (obj *Object) SetProperty(name string, rhs *Value, attributes uint8) error {
jsstr := NewString(name)
defer jsstr.Release()
errVal := obj.ctx.newErrorValue()
C.JSObjectSetProperty(obj.ctx.ref, obj.ref, C.JSStringRef(unsafe.Pointer(jsstr)), rhs.ref,
(C.JSPropertyAttributes)(attributes), &errVal.ref)
if errVal.ref != nil {
return errVal
}
return nil
}