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, // "keygen" has been removed from the spec, but are kept here for backwards compatibility.
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}