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find.go
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find.go
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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.
package htmlutil
import (
"golang.org/x/net/html"
)
func FindFirstNode(node *html.Node, matcher Matcher) *html.Node {
if matcher(node) {
return node
}
for c := node.FirstChild; c != nil; c = c.NextSibling {
out := FindFirstNode(c, matcher)
if out != nil {
return out
}
}
return nil
}
func FindLastNode(node *html.Node, matcher Matcher) *html.Node {
if matcher(node) {
return node
}
for c := node.LastChild; c != nil; c = c.PrevSibling {
out := FindLastNode(c, matcher)
if out != nil {
return out
}
}
return nil
}
func findAllNodesInternal(out *[]*html.Node, node *html.Node, matcher Matcher) {
if matcher(node) {
*out = append(*out, node)
}
for c := node.FirstChild; c != nil; c = c.NextSibling {
findAllNodesInternal(out, c, matcher)
}
}
func FindAllNodes(node *html.Node, matcher Matcher) []*html.Node {
var out []*html.Node
findAllNodesInternal(&out, node, matcher)
return out
}