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package domutils
import (
"context"
"strings"
"github.com/JohannesKaufmann/dom"
"golang.org/x/net/html"
"golang.org/x/net/html/atom"
)
// MoveListItems moves non-"li" nodes into the previous "li" nodes.
func MoveListItems(ctx context.Context, n *html.Node) {
if n.Type == html.ElementNode && (n.Data == "ol" || n.Data == "ul") {
var previousLi *html.Node
// Collect children to avoid modifying the slice while iterating.
children := dom.AllChildNodes(n)
for _, child := range children {
if child.Type == html.ElementNode && child.Data == "li" {
previousLi = child
} else if child.Type == html.TextNode && strings.TrimSpace(child.Data) == "" {
// Skip the node, probably just formatting of code
} else {
// We expect that inside an "ol"/"ul" there are *only* "li" nodes.
// But sometimes that is not the case...
if previousLi != nil {
// There is a previous "li" node,
// so we move this content into the other "li" node.
n.RemoveChild(child)
previousLi.AppendChild(child)
} else {
// There is no previous "li" node,
// so we wrap this node with it's own "li" node.
newNode := &html.Node{
Type: html.ElementNode,
DataAtom: atom.Li,
Data: "li",
}
previousLi = dom.WrapNode(child, newNode)
}
}
}
}
for c := n.FirstChild; c != nil; c = c.NextSibling {
MoveListItems(ctx, c)
}
}
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