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therubyracer/lib/v8/access.rb

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require 'set'
module V8
class Access
def initialize(portal)
@classes = Hash.new do |h, cls|
h[cls] = template(cls).tap do |t|
portal.setuptemplate(t.InstanceTemplate())
if cls.name && cls.name =~ /(::)?(\w+?)$/
t.SetClassName(C::String::NewSymbol("rb::" + $2))
else
t.SetClassName("Ruby")
end
end
end
@impl = RubyAccess.new
end
def [](cls)
@classes[cls]
end
def template(cls)
C::FunctionTemplate::New() do |arguments|
unless arguments.Length() == 1 && arguments[0].kind_of?(C::External)
C::ThrowException(C::Exception::Error(C::String::New("cannot call native constructor from javascript")))
else
arguments.This().tap do |this|
this.SetHiddenValue(C::String::NewSymbol("TheRubyRacer::RubyObject"), arguments[0])
end
end
end
end
def method_missing(name, *args, &blk)
@impl.send(name, *args, &blk)
end
end
class RubyAccess
def get(obj, name, &dontintercept)
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methods = accessible_methods(obj)
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if methods.include?(name)
method = obj.method(name)
method.arity == 0 ? method.call : method
elsif obj.respond_to?(:[])
obj.send(:[], name, &dontintercept)
else
yield
end
end
def iget(obj, index, &dontintercept)
if obj.respond_to?(:[])
obj.send(:[], index, &dontintercept)
else
yield
end
end
def set(obj, name, value, &dontintercept)
setter = name + "="
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methods = accessible_methods(obj, true)
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if methods.include?(setter)
obj.send(setter, value)
elsif obj.respond_to?(:[]=)
obj.send(:[]=, name, value, &dontintercept)
else
yield
end
end
def iset(obj, index, value, &dontintercept)
if obj.respond_to?(:[]=)
obj.send(:[]=, index, value, &dontintercept)
else
yield
end
end
def query(obj, name, attributes)
if obj.respond_to?(name)
attributes.dont_delete
unless obj.respond_to?(name + "=")
attributes.read_only
end
else
yield
end
end
def iquery(obj, index, attributes)
if obj.respond_to?(:[])
attributes.dont_delete
unless obj.respond_to?(:[]=)
attributes.read_only
end
else
yield
end
end
def names(obj)
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accessible_methods(obj)
end
def indices(obj)
obj.respond_to?(:length) ? (0..obj.length).to_a : yield
end
private
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def accessible_methods(obj, special_methods = false)
obj.public_methods(false).map {|m| m.to_s}.to_set.tap do |methods|
ancestors = obj.class.ancestors.dup
while ancestor = ancestors.shift
break if ancestor == ::Object
methods.merge(ancestor.public_instance_methods(false).map {|m| m.to_s})
end
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methods.reject! {|m| m == "[]" || m == "[]=" || m =~ /=$/} unless special_methods
end
end
end
end