1 package xml
2
3 import (
4 "bytes"
5 "encoding/xml"
6 "io"
7 "strings"
8 )
9
10 type xmlAttrSlice []xml.Attr
11
12 func (x xmlAttrSlice) Len() int {
13 return len(x)
14 }
15
16 func (x xmlAttrSlice) Less(i, j int) bool {
17 spaceI, spaceJ := x[i].Name.Space, x[j].Name.Space
18 localI, localJ := x[i].Name.Local, x[j].Name.Local
19 valueI, valueJ := x[i].Value, x[j].Value
20
21 spaceCmp := strings.Compare(spaceI, spaceJ)
22 localCmp := strings.Compare(localI, localJ)
23 valueCmp := strings.Compare(valueI, valueJ)
24
25 if spaceCmp == -1 || (spaceCmp == 0 && (localCmp == -1 || (localCmp == 0 && valueCmp == -1))) {
26 return true
27 }
28
29 return false
30 }
31
32 func (x xmlAttrSlice) Swap(i, j int) {
33 x[i], x[j] = x[j], x[i]
34 }
35
36
37 func SortXML(r io.Reader, ignoreIndentation bool) (string, error) {
38 var buf bytes.Buffer
39 d := xml.NewDecoder(r)
40 root, err := XMLToStruct(d, nil, ignoreIndentation)
41 if err != nil {
42 return buf.String(), err
43 }
44
45 e := xml.NewEncoder(&buf)
46 err = StructToXML(e, root, true)
47 return buf.String(), err
48 }
49
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