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
183
184
185
|
require 'rdoc/markup/formatter'
require 'rdoc/markup/fragments'
require 'rdoc/markup/inline'
require 'cgi'
class RDoc::Markup
module Flow
P = Struct.new(:body)
VERB = Struct.new(:body)
RULE = Struct.new(:width)
class LIST
attr_reader :type, :contents
def initialize(type)
@type = type
@contents = []
end
def <<(stuff)
@contents << stuff
end
end
LI = Struct.new(:label, :body)
H = Struct.new(:level, :text)
end
class ToFlow < RDoc::Markup::Formatter
LIST_TYPE_TO_HTML = {
:BULLET => [ "<ul>", "</ul>" ],
:NUMBER => [ "<ol>", "</ol>" ],
:UPPERALPHA => [ "<ol>", "</ol>" ],
:LOWERALPHA => [ "<ol>", "</ol>" ],
:LABELED => [ "<dl>", "</dl>" ],
:NOTE => [ "<table>", "</table>" ],
}
InlineTag = Struct.new(:bit, :on, :off)
def initialize
super
init_tags
end
##
# Set up the standard mapping of attributes to HTML tags
def init_tags
@attr_tags = [
InlineTag.new(RDoc::Markup::Attribute.bitmap_for(:BOLD), "<b>", "</b>"),
InlineTag.new(RDoc::Markup::Attribute.bitmap_for(:TT), "<tt>", "</tt>"),
InlineTag.new(RDoc::Markup::Attribute.bitmap_for(:EM), "<em>", "</em>"),
]
end
##
# Add a new set of HTML tags for an attribute. We allow separate start and
# end tags for flexibility
def add_tag(name, start, stop)
@attr_tags << InlineTag.new(RDoc::Markup::Attribute.bitmap_for(name), start, stop)
end
##
# Given an HTML tag, decorate it with class information and the like if
# required. This is a no-op in the base class, but is overridden in HTML
# output classes that implement style sheets
def annotate(tag)
tag
end
##
# Here's the client side of the visitor pattern
def start_accepting
@res = []
@list_stack = []
end
def end_accepting
@res
end
def accept_paragraph(am, fragment)
@res << Flow::P.new((convert_flow(am.flow(fragment.txt))))
end
def accept_verbatim(am, fragment)
@res << Flow::VERB.new((convert_flow(am.flow(fragment.txt))))
end
def accept_rule(am, fragment)
size = fragment.param
size = 10 if size > 10
@res << Flow::RULE.new(size)
end
def accept_list_start(am, fragment)
@list_stack.push(@res)
list = Flow::LIST.new(fragment.type)
@res << list
@res = list
end
def accept_list_end(am, fragment)
@res = @list_stack.pop
end
def accept_list_item(am, fragment)
@res << Flow::LI.new(fragment.param, convert_flow(am.flow(fragment.txt)))
end
def accept_blank_line(am, fragment)
# @res << annotate("<p />") << "\n"
end
def accept_heading(am, fragment)
@res << Flow::H.new(fragment.head_level, convert_flow(am.flow(fragment.txt)))
end
private
def on_tags(res, item)
attr_mask = item.turn_on
return if attr_mask.zero?
@attr_tags.each do |tag|
if attr_mask & tag.bit != 0
res << annotate(tag.on)
end
end
end
def off_tags(res, item)
attr_mask = item.turn_off
return if attr_mask.zero?
@attr_tags.reverse_each do |tag|
if attr_mask & tag.bit != 0
res << annotate(tag.off)
end
end
end
def convert_flow(flow)
res = ""
flow.each do |item|
case item
when String
res << convert_string(item)
when AttrChanger
off_tags(res, item)
on_tags(res, item)
when Special
res << convert_special(item)
else
raise "Unknown flow element: #{item.inspect}"
end
end
res
end
def convert_string(item)
CGI.escapeHTML(item)
end
def convert_special(special)
handled = false
Attribute.each_name_of(special.type) do |name|
method_name = "handle_special_#{name}"
if self.respond_to? method_name
special.text = send(method_name, special)
handled = true
end
end
raise "Unhandled special: #{special}" unless handled
special.text
end
end
end
|