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
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
module CodeRay
module Scanners
# HTML Scanner
class HTML < Scanner
include Streamable
register_for :html
KINDS_NOT_LOC = [
:comment, :doctype, :preprocessor,
:tag, :attribute_name, :operator,
:attribute_value, :delimiter, :content,
:plain, :entity, :error
]
ATTR_NAME = /[\w.:-]+/
ATTR_VALUE_UNQUOTED = ATTR_NAME
TAG_END = /\/?>/
HEX = /[0-9a-fA-F]/
ENTITY = /
&
(?:
\w+
|
\#
(?:
\d+
|
x#{HEX}+
)
)
;
/ox
PLAIN_STRING_CONTENT = {
"'" => /[^&'>\n]+/,
'"' => /[^&">\n]+/,
}
def reset
super
@state = :initial
end
private
def setup
@state = :initial
@plain_string_content = nil
end
def scan_tokens tokens, options
state = @state
plain_string_content = @plain_string_content
until eos?
kind = nil
match = nil
if scan(/\s+/m)
kind = :space
else
case state
when :initial
if scan(/<!--.*?-->/m)
kind = :comment
elsif scan(/<!DOCTYPE.*?>/m)
kind = :doctype
elsif scan(/<\?xml.*?\?>/m)
kind = :preprocessor
elsif scan(/<\?.*?\?>|<%.*?%>/m)
kind = :comment
elsif scan(/<\/[-\w.:]*>/m)
kind = :tag
elsif match = scan(/<[-\w.:]+>?/m)
kind = :tag
state = :attribute unless match[-1] == ?>
elsif scan(/[^<>&]+/)
kind = :plain
elsif scan(/#{ENTITY}/ox)
kind = :entity
elsif scan(/[<>&]/)
kind = :error
else
raise_inspect '[BUG] else-case reached with state %p' % [state], tokens
end
when :attribute
if scan(/#{TAG_END}/)
kind = :tag
state = :initial
elsif scan(/#{ATTR_NAME}/o)
kind = :attribute_name
state = :attribute_equal
else
kind = :error
getch
end
when :attribute_equal
if scan(/=/)
kind = :operator
state = :attribute_value
elsif scan(/#{ATTR_NAME}/o)
kind = :attribute_name
elsif scan(/#{TAG_END}/o)
kind = :tag
state = :initial
elsif scan(/./)
kind = :error
state = :attribute
end
when :attribute_value
if scan(/#{ATTR_VALUE_UNQUOTED}/o)
kind = :attribute_value
state = :attribute
elsif match = scan(/["']/)
tokens << [:open, :string]
state = :attribute_value_string
plain_string_content = PLAIN_STRING_CONTENT[match]
kind = :delimiter
elsif scan(/#{TAG_END}/o)
kind = :tag
state = :initial
else
kind = :error
getch
end
when :attribute_value_string
if scan(plain_string_content)
kind = :content
elsif scan(/['"]/)
tokens << [matched, :delimiter]
tokens << [:close, :string]
state = :attribute
next
elsif scan(/#{ENTITY}/ox)
kind = :entity
elsif scan(/&/)
kind = :content
elsif scan(/[\n>]/)
tokens << [:close, :string]
kind = :error
state = :initial
end
else
raise_inspect 'Unknown state: %p' % [state], tokens
end
end
match ||= matched
if $DEBUG and not kind
raise_inspect 'Error token %p in line %d' %
[[match, kind], line], tokens, state
end
raise_inspect 'Empty token', tokens unless match
tokens << [match, kind]
end
if options[:keep_state]
@state = state
@plain_string_content = plain_string_content
end
tokens
end
end
end
end
|
