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Add support for embedded SpiderMonkey via Johnson
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,112 @@ | ||
module ExecJS | ||
class JohnsonRuntime | ||
class Context | ||
def initialize(source = "") | ||
@runtime = Johnson::Runtime.new | ||
@runtime.evaluate(source) | ||
end | ||
|
||
def exec(source, options = {}) | ||
souce = source.encode('UTF-8') if source.respond_to?(:encode) | ||
|
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if /\S/ =~ source | ||
eval "(function(){#{source}})()", options | ||
end | ||
end | ||
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def eval(source, options = {}) | ||
souce = source.encode('UTF-8') if source.respond_to?(:encode) | ||
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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 | ||
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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 | ||
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def unbox(value) | ||
case | ||
when function?(value) | ||
nil | ||
when string?(value) | ||
value.respond_to?(:force_encoding) ? | ||
value.force_encoding('UTF-8') : | ||
value | ||
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 | ||
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private | ||
def syntax_error?(error) | ||
error.message =~ /^syntax error at / | ||
end | ||
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def function?(value) | ||
value.respond_to?(:function?) && value.function? | ||
end | ||
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def string?(value) | ||
value.is_a?(String) | ||
end | ||
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def array?(value) | ||
array_test.call(value) | ||
end | ||
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def object?(value) | ||
value.respond_to?(:inject) | ||
end | ||
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def array_test | ||
@array_test ||= @runtime.evaluate("(function(a) {return a instanceof [].constructor})") | ||
end | ||
end | ||
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def name | ||
"Johnson (SpiderMonkey)" | ||
end | ||
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def exec(source) | ||
context = Context.new | ||
context.exec(source) | ||
end | ||
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def eval(source) | ||
context = Context.new | ||
context.eval(source) | ||
end | ||
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def compile(source) | ||
Context.new(source) | ||
end | ||
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def available? | ||
require "johnson" | ||
true | ||
rescue LoadError | ||
false | ||
end | ||
end | ||
end |
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