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require "execjs/runtime"
module ExecJS
class RubyRhinoRuntime < Runtime
class Context < Runtime::Context
def initialize(runtime, source = "")
source = encode(source)
@rhino_context = ::Rhino::Context.new
fix_memory_limit! @rhino_context
@rhino_context.eval(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 @rhino_context.eval("(#{source})")
end
rescue ::Rhino::JSError => e
if e.message =~ /^syntax error/
raise RuntimeError, e.message
else
raise ProgramError, e.message
end
end
def call(properties, *args)
unbox @rhino_context.eval(properties).call(*args)
rescue ::Rhino::JSError => e
if e.message == "syntax error"
raise RuntimeError, e.message
else
raise ProgramError, e.message
end
end
def unbox(value)
case value = ::Rhino::to_ruby(value)
when Java::OrgMozillaJavascript::NativeFunction
nil
when Java::OrgMozillaJavascript::NativeObject
value.inject({}) do |vs, (k, v)|
case v
when Java::OrgMozillaJavascript::NativeFunction, ::Rhino::JS::Function
nil
else
vs[k] = unbox(v)
end
vs
end
when Array
value.map { |v| unbox(v) }
else
value
end
end
private
# Disables bytecode compiling which limits you to 64K scripts
def fix_memory_limit!(context)
if context.respond_to?(:optimization_level=)
context.optimization_level = -1
else
context.instance_eval { @native.setOptimizationLevel(-1) }
end
end
end
def name
"therubyrhino (Rhino)"
end
def available?
require "rhino"
true
rescue LoadError
false
end
end
end
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