package xmlutil

import (

	"encoding/xml"

	"strings"

)

type xmlAttrSlice []xml.Attr

func (x xmlAttrSlice) Len() int {

	return len(x)

}

func (x xmlAttrSlice) Less(i, j int) bool {

	spaceI, spaceJ := x[i].Name.Space, x[j].Name.Space

	localI, localJ := x[i].Name.Local, x[j].Name.Local

	valueI, valueJ := x[i].Value, x[j].Value

	spaceCmp := strings.Compare(spaceI, spaceJ)

	localCmp := strings.Compare(localI, localJ)

	valueCmp := strings.Compare(valueI, valueJ)

	if spaceCmp == -1 || (spaceCmp == 0 && (localCmp == -1 || (localCmp == 0 && valueCmp == -1))) {

		return true

	}

	return false

}

func (x xmlAttrSlice) Swap(i, j int) {

	x[i], x[j] = x[j], x[i]

}