func paramToInt(value *js.Object) int32 {
result := int32(value.Int())
if value.String() == "true" {
result = 1
}
return result
}
func isEmpty(v, t *js.Object) bool {
switch t.Get("kind").Int() {
case boolKind:
return !v.Bool()
case int8Kind, int16Kind, int32Kind, intKind, uint8Kind, uint16Kind, uint32Kind, uintKind:
return v.Int() == 0
case int64Kind, uint64Kind:
return v.Int64() == 0
case float32Kind, float64Kind:
return v.Float() == 0
case arrayKind, sliceKind, stringKind:
return v.Length() == 0
case ptrKind:
return v == t.Get("nil")
case interfaceKind:
if v.Get("$val") == js.Undefined {
return true
}
return isEmpty(v.Get("$val"), v.Get("constructor"))
case mapKind:
return js.Global.Get("Object").Call("keys", v).Length() == 0
}
return false
}
//Invert calls the scale to interpolate a range value into its domain.
func (self *linearScaleImpl) Invert(obj js.Object, fn ExtractorFunc) int64 {
if fn != nil {
return int64(self.obj.Call("invert", fn(obj)).Int())
}
return int64(self.obj.Call("invert", obj.Int()).Int())
}
//Linear calls the scale to interpolate a value into its range.
func (self *linearScaleImpl) Linear(obj js.Object, fn ExtractorFunc) int64 {
if fn != nil {
return int64(self.obj.Invoke(fn(obj)).Int())
}
return int64(self.obj.Invoke(obj.Int()).Int())
}