blob: f99db214a1e0752a5c6bf61933e39b557e381d0f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
package jsonpath
import (
base "src.userspace.com.au/felix/query"
)
type Selector func(base.Node) bool
// MatchAll returns a slice of the nodes that match the selector,
// from n and its children.
func (s Selector) MatchAll(n base.Node) []base.Node {
return s.matchAllInto(n, nil)
}
func (s Selector) matchAllInto(n base.Node, storage []base.Node) []base.Node {
if s(n) {
storage = append(storage, n)
}
for child := n.FirstChild(); child != nil; child = child.NextSibling() {
storage = s.matchAllInto(child, storage)
}
return storage
}
// Match returns true if the node matches the selector.
func (s Selector) Match(n base.Node) bool {
return s(n)
}
// MatchFirst returns the first node that matches s, from n and its children.
func (s Selector) MatchFirst(n base.Node) base.Node {
if s.Match(n) {
return n
}
for c := n.FirstChild(); c != nil; c = c.NextSibling() {
m := s.MatchFirst(c)
if m != nil {
return m
}
}
return nil
}
// Filter returns the nodes in nodes that match the selector.
func (s Selector) Filter(nodes []base.Node) (result []base.Node) {
for _, n := range nodes {
if s(n) {
result = append(result, n)
}
}
return result
}
|
