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
|
require "execjs/runtime"
module ExecJS
class JohnsonRuntime < Runtime
class Context < Runtime::Context
def initialize(runtime, source = "")
source = encode(source)
@runtime = Johnson::Runtime.new
@runtime.evaluate(source)
end
def exec(source, options = {})
source = encode(source)
if /\S/ =~ source
eval "(function(){#{source}})()", options
end
end
def eval(source, options = {})
source = encode(source)
if /\S/ =~ source
unbox @runtime.evaluate("(#{source})")
end
rescue Johnson::Error => e
if syntax_error?(e)
raise RuntimeError, e.message
else
raise ProgramError, e.message
end
end
def call(properties, *args)
unbox @runtime.evaluate(properties).call(*args)
rescue Johnson::Error => e
if syntax_error?(e)
raise RuntimeError, e.message
else
raise ProgramError, e.message
end
end
def unbox(value)
case
when function?(value)
nil
when string?(value)
value.force_encoding('UTF-8')
when array?(value)
value.map { |v| unbox(v) }
when object?(value)
value.inject({}) do |vs, (k, v)|
vs[k] = unbox(v) unless function?(v)
vs
end
else
value
end
end
private
def syntax_error?(error)
error.message =~ /^syntax error at /
end
def function?(value)
value.respond_to?(:function?) && value.function?
end
def string?(value)
value.is_a?(String)
end
def array?(value)
array_test.call(value)
end
def object?(value)
value.respond_to?(:inject)
end
def array_test
@array_test ||= @runtime.evaluate("(function(a) {return a instanceof [].constructor})")
end
end
def name
"Johnson (SpiderMonkey)"
end
def available?
require "johnson"
true
rescue LoadError
false
end
def deprecated?
true
end
end
end
|
