// Although nodes slice is not modified, its elements are.
func compactNodes(nodes []types.Node) []types.Node {
res := make([]types.Node, 0, len(nodes))
var last types.Node
for _, n := range nodes {
switch {
case n.Type() == types.NodeList:
l := n.(*types.ListNode)
l.Nodes = compactNodes(l.Nodes)
case types.IsItemsList(n.Type()):
l := n.(*types.ItemsListNode)
for _, it := range l.Items {
it.Nodes = compactNodes(it.Nodes)
}
}
if last == nil || !concatNodes(last, n) {
last = n
res = append(res, n)
if n.Type() == types.NodeCode {
c := n.(*types.CodeNode)
c.Value = strings.TrimLeft(c.Value, "\n")
}
}
}
return res
}
func concatNodes(a, b types.Node) bool {
switch {
case a.Type() == types.NodeText && b.Type() == types.NodeText:
return concatText(a, b)
case a.Type() == types.NodeCode && b.Type() == types.NodeCode:
return concatCode(a, b)
case a.Type() == types.NodeCode && b.Type() == types.NodeText:
t := b.(*types.TextNode)
if strings.TrimSpace(t.Value) == "" {
return true
}
case a.Type() == types.NodeURL && b.Type() == types.NodeURL:
return concatURL(a, b)
case types.IsItemsList(a.Type()) && types.IsItemsList(b.Type()):
return concatItemsList(a, b)
}
return false
}