1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
require 'set'
require 'cgi'
module Ronn
# Miscellaneous utilities.
module Utils
# All HTML 4 elements and some that are in common use.
HTML = %w[
a abbr acronym address applet area b base basefont bdo big blockquote body
br button caption center cite code col colgroup dd del dfn dir div dl dt
em fieldset font form frame frameset h1 h2 h3 h4 h5 h6 head hr html i
iframe img input ins isindex kbd label legend li link map menu meta
noframes noscript object ol optgroup option p param pre q s samp script
select small span strike strong style sub sup table tbody td textarea
tfoot th thead title tr tt u ul var
].to_set
# Block elements.
HTML_BLOCK = %w[
blockquote body colgroup dd div dl dt fieldset form frame frameset
h1 h2 h3 h4 h5 h6 hr head html iframe li noframes noscript
object ol optgroup option p param pre script select
style table tbody td textarea tfoot th thead title tr tt ul
].to_set
# Inline elements
HTML_INLINE = HTML - HTML_BLOCK
# Elements that don't have a closing tag.
HTML_EMPTY = %w[area base basefont br col hr input link meta].to_set
def block_element?(name)
HTML_BLOCK.include?(name)
end
def inline_element?(name)
HTML_INLINE.include?(name)
end
def empty_element?(name)
HTML_EMPTY.include?(name)
end
def html_element?(name)
HTML.include?(name)
end
def child_of?(node, tag)
while node
return true if node.name && node.name.downcase == tag
return false if node.document?
node = node.parent
end
false
end
end
end
|
