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
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
# ANSI color library
#
# Implementation per http://en.wikipedia.org/wiki/ANSI_escape_code
module Ci
module Ansi2html
# keys represent the trailing digit in color changing command (30-37, 40-47, 90-97. 100-107)
COLOR = {
0 => 'black', # not that this is gray in the intense color table
1 => 'red',
2 => 'green',
3 => 'yellow',
4 => 'blue',
5 => 'magenta',
6 => 'cyan',
7 => 'white', # not that this is gray in the dark (aka default) color table
}
STYLE_SWITCHES = {
bold: 0x01,
italic: 0x02,
underline: 0x04,
conceal: 0x08,
cross: 0x10,
}
def self.convert(ansi)
Converter.new().convert(ansi)
end
class Converter
def on_0(s) reset() end
def on_1(s) enable(STYLE_SWITCHES[:bold]) end
def on_3(s) enable(STYLE_SWITCHES[:italic]) end
def on_4(s) enable(STYLE_SWITCHES[:underline]) end
def on_8(s) enable(STYLE_SWITCHES[:conceal]) end
def on_9(s) enable(STYLE_SWITCHES[:cross]) end
def on_21(s) disable(STYLE_SWITCHES[:bold]) end
def on_22(s) disable(STYLE_SWITCHES[:bold]) end
def on_23(s) disable(STYLE_SWITCHES[:italic]) end
def on_24(s) disable(STYLE_SWITCHES[:underline]) end
def on_28(s) disable(STYLE_SWITCHES[:conceal]) end
def on_29(s) disable(STYLE_SWITCHES[:cross]) end
def on_30(s) set_fg_color(0) end
def on_31(s) set_fg_color(1) end
def on_32(s) set_fg_color(2) end
def on_33(s) set_fg_color(3) end
def on_34(s) set_fg_color(4) end
def on_35(s) set_fg_color(5) end
def on_36(s) set_fg_color(6) end
def on_37(s) set_fg_color(7) end
def on_38(s) set_fg_color_256(s) end
def on_39(s) set_fg_color(9) end
def on_40(s) set_bg_color(0) end
def on_41(s) set_bg_color(1) end
def on_42(s) set_bg_color(2) end
def on_43(s) set_bg_color(3) end
def on_44(s) set_bg_color(4) end
def on_45(s) set_bg_color(5) end
def on_46(s) set_bg_color(6) end
def on_47(s) set_bg_color(7) end
def on_48(s) set_bg_color_256(s) end
def on_49(s) set_bg_color(9) end
def on_90(s) set_fg_color(0, 'l') end
def on_91(s) set_fg_color(1, 'l') end
def on_92(s) set_fg_color(2, 'l') end
def on_93(s) set_fg_color(3, 'l') end
def on_94(s) set_fg_color(4, 'l') end
def on_95(s) set_fg_color(5, 'l') end
def on_96(s) set_fg_color(6, 'l') end
def on_97(s) set_fg_color(7, 'l') end
def on_99(s) set_fg_color(9, 'l') end
def on_100(s) set_bg_color(0, 'l') end
def on_101(s) set_bg_color(1, 'l') end
def on_102(s) set_bg_color(2, 'l') end
def on_103(s) set_bg_color(3, 'l') end
def on_104(s) set_bg_color(4, 'l') end
def on_105(s) set_bg_color(5, 'l') end
def on_106(s) set_bg_color(6, 'l') end
def on_107(s) set_bg_color(7, 'l') end
def on_109(s) set_bg_color(9, 'l') end
def convert(ansi)
@out = ""
@n_open_tags = 0
reset()
s = StringScanner.new(ansi.gsub("<", "<"))
while(!s.eos?)
if s.scan(/\e([@-_])(.*?)([@-~])/)
handle_sequence(s)
else
@out << s.scan(/./m)
end
end
close_open_tags()
@out
end
def handle_sequence(s)
indicator = s[1]
commands = s[2].split ';'
terminator = s[3]
# We are only interested in color and text style changes - triggered by
# sequences starting with '\e[' and ending with 'm'. Any other control
# sequence gets stripped (including stuff like "delete last line")
return unless indicator == '[' and terminator == 'm'
close_open_tags()
if commands.empty?()
reset()
return
end
evaluate_command_stack(commands)
css_classes = []
unless @fg_color.nil?
fg_color = @fg_color
# Most terminals show bold colored text in the light color variant
# Let's mimic that here
if @style_mask & STYLE_SWITCHES[:bold] != 0
fg_color.sub!(/fg-(\w{2,}+)/, 'fg-l-\1')
end
css_classes << fg_color
end
css_classes << @bg_color unless @bg_color.nil?
STYLE_SWITCHES.each do |css_class, flag|
css_classes << "term-#{css_class}" if @style_mask & flag != 0
end
open_new_tag(css_classes) if css_classes.length > 0
end
def evaluate_command_stack(stack)
return unless command = stack.shift()
if self.respond_to?("on_#{command}", true)
self.send("on_#{command}", stack)
end
evaluate_command_stack(stack)
end
def open_new_tag(css_classes)
@out << %{<span class="#{css_classes.join(' ')}">}
@n_open_tags += 1
end
def close_open_tags
while @n_open_tags > 0
@out << %{</span>}
@n_open_tags -= 1
end
end
def reset
@fg_color = nil
@bg_color = nil
@style_mask = 0
end
def enable(flag)
@style_mask |= flag
end
def disable(flag)
@style_mask &= ~flag
end
def set_fg_color(color_index, prefix = nil)
@fg_color = get_term_color_class(color_index, ["fg", prefix])
end
def set_bg_color(color_index, prefix = nil)
@bg_color = get_term_color_class(color_index, ["bg", prefix])
end
def get_term_color_class(color_index, prefix)
color_name = COLOR[color_index]
return nil if color_name.nil?
get_color_class(["term", prefix, color_name])
end
def set_fg_color_256(command_stack)
css_class = get_xterm_color_class(command_stack, "fg")
@fg_color = css_class unless css_class.nil?
end
def set_bg_color_256(command_stack)
css_class = get_xterm_color_class(command_stack, "bg")
@bg_color = css_class unless css_class.nil?
end
def get_xterm_color_class(command_stack, prefix)
# the 38 and 48 commands have to be followed by "5" and the color index
return unless command_stack.length >= 2
return unless command_stack[0] == "5"
command_stack.shift() # ignore the "5" command
color_index = command_stack.shift().to_i
return unless color_index >= 0
return unless color_index <= 255
get_color_class(["xterm", prefix, color_index])
end
def get_color_class(segments)
[segments].flatten.compact.join('-')
end
end
end
end
|
