frustra/bbcode [list] Tag Implementation

gistfile1.go

// Note: Use of this list tag implementation requires that `autoCloseTags` be set to true.

// Example use:
// [list]
// [*] Item 1
// [*] Item 2
// [/list]

compiler.SetTag("list", func(node *bbcode.BBCodeNode) (*bbcode.HTMLTag, bool) {
	out := bbcode.NewHTMLTag("")
	out.Name = "ul"
	style := node.GetOpeningTag().Value
	switch style {
	case "a":
		out.Attrs["style"] = "list-style-type: lower-alpha;"
	case "A":
		out.Attrs["style"] = "list-style-type: upper-alpha;"
	case "i":
		out.Attrs["style"] = "list-style-type: lower-roman;"
	case "I":
		out.Attrs["style"] = "list-style-type: upper-roman;"
	case "1":
		out.Attrs["style"] = "list-style-type: decimal;"
	default:
		out.Attrs["style"] = "list-style-type: disc;"
	}

	if len(node.Children) == 0 {
		out.AppendChild(bbcode.NewHTMLTag(""))
	} else {
		node.Info = []*bbcode.HTMLTag{out, out}
		tags := node.Info.([]*bbcode.HTMLTag)
		for _, child := range node.Children {
			curr := tags[1]
			curr.AppendChild(node.Compiler.CompileTree(child))
		}
		if len(tags[1].Children) > 0 {
			last := tags[1].Children[len(tags[1].Children)-1]
			if len(last.Children) > 0 && last.Children[len(last.Children)-1].Name == "br" {
				last.Children[len(last.Children)-1] = bbcode.NewHTMLTag("")
			}
		} else {
			tags[1].AppendChild(bbcode.NewHTMLTag(""))
		}
	}
	return out, false
})

compiler.SetTag("*", func(node *bbcode.BBCodeNode) (*bbcode.HTMLTag, bool) {
	parent := node.Parent
	for parent != nil {
		if parent.ID == bbcode.OPENING_TAG && parent.GetOpeningTag().Name == "list" {
			out := bbcode.NewHTMLTag("")
			out.Name = "li"
			tags := parent.Info.([]*bbcode.HTMLTag)
			if len(tags[1].Children) > 0 {
				last := tags[1].Children[len(tags[1].Children)-1]
				if len(last.Children) > 0 && last.Children[len(last.Children)-1].Name == "br" {
					last.Children[len(last.Children)-1] = bbcode.NewHTMLTag("")
				}
			} else {
				tags[1].AppendChild(bbcode.NewHTMLTag(""))
			}
			tags[1] = out
			tags[0].AppendChild(out)

			if len(parent.Children) == 0 {
				out.AppendChild(bbcode.NewHTMLTag(""))
			} else {
				for _, child := range node.Children {
					curr := tags[1]
					curr.AppendChild(node.Compiler.CompileTree(child))
				}
			}
			if node.ClosingTag != nil {
				tag := bbcode.NewHTMLTag(node.ClosingTag.Raw)
				bbcode.InsertNewlines(tag)
				out.AppendChild(tag)
			}
			return nil, false
		}
		parent = parent.Parent
	}
	return bbcode.DefaultTagCompiler(node)
})