1// Copyright 2011 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package html
6
7// Section 12.2.4.2 of the HTML5 specification says "The following elements
8// have varying levels of special parsing rules".
9// https://html.spec.whatwg.org/multipage/syntax.html#the-stack-of-open-elements
10var isSpecialElementMap = map[string]bool{
11	"address":    true,
12	"applet":     true,
13	"area":       true,
14	"article":    true,
15	"aside":      true,
16	"base":       true,
17	"basefont":   true,
18	"bgsound":    true,
19	"blockquote": true,
20	"body":       true,
21	"br":         true,
22	"button":     true,
23	"caption":    true,
24	"center":     true,
25	"col":        true,
26	"colgroup":   true,
27	"dd":         true,
28	"details":    true,
29	"dir":        true,
30	"div":        true,
31	"dl":         true,
32	"dt":         true,
33	"embed":      true,
34	"fieldset":   true,
35	"figcaption": true,
36	"figure":     true,
37	"footer":     true,
38	"form":       true,
39	"frame":      true,
40	"frameset":   true,
41	"h1":         true,
42	"h2":         true,
43	"h3":         true,
44	"h4":         true,
45	"h5":         true,
46	"h6":         true,
47	"head":       true,
48	"header":     true,
49	"hgroup":     true,
50	"hr":         true,
51	"html":       true,
52	"iframe":     true,
53	"img":        true,
54	"input":      true,
55	"keygen":     true,
56	"li":         true,
57	"link":       true,
58	"listing":    true,
59	"main":       true,
60	"marquee":    true,
61	"menu":       true,
62	"meta":       true,
63	"nav":        true,
64	"noembed":    true,
65	"noframes":   true,
66	"noscript":   true,
67	"object":     true,
68	"ol":         true,
69	"p":          true,
70	"param":      true,
71	"plaintext":  true,
72	"pre":        true,
73	"script":     true,
74	"section":    true,
75	"select":     true,
76	"source":     true,
77	"style":      true,
78	"summary":    true,
79	"table":      true,
80	"tbody":      true,
81	"td":         true,
82	"template":   true,
83	"textarea":   true,
84	"tfoot":      true,
85	"th":         true,
86	"thead":      true,
87	"title":      true,
88	"tr":         true,
89	"track":      true,
90	"ul":         true,
91	"wbr":        true,
92	"xmp":        true,
93}
94
95func isSpecialElement(element *Node) bool {
96	switch element.Namespace {
97	case "", "html":
98		return isSpecialElementMap[element.Data]
99	case "math":
100		switch element.Data {
101		case "mi", "mo", "mn", "ms", "mtext", "annotation-xml":
102			return true
103		}
104	case "svg":
105		switch element.Data {
106		case "foreignObject", "desc", "title":
107			return true
108		}
109	}
110	return false
111}
112