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therubyracer/lib/v8/context.rb

103 lines
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2.5 KiB
Ruby

require 'stringio'
module V8
class Context
attr_reader :native, :scope, :access
def initialize(opts = {})
@access = Access.new
@to = Portal.new(self, @access)
with = opts[:with]
constructor = nil
template = if with
constructor = @to.templates.to_constructor(with.class)
constructor.disable()
constructor.template.InstanceTemplate()
else
C::ObjectTemplate::New()
end
@native = opts[:with] ? C::Context::New(template) : C::Context::New()
@native.enter do
@global = @native.Global()
@to.proxies.register_javascript_proxy @global, :for => with if with
constructor.enable() if constructor
@scope = @to.rb(@global)
@global.SetHiddenValue(C::String::NewSymbol("TheRubyRacer::RubyContext"), C::External::New(self))
end
yield(self) if block_given?
end
def eval(javascript, filename = "<eval>", line = 1)
if IO === javascript || StringIO === javascript
javascript = javascript.read()
end
err = nil
value = nil
C::TryCatch.try do |try|
@native.enter do
script = C::Script::Compile(@to.v8(javascript.to_s), @to.v8(filename.to_s))
if try.HasCaught()
err = JSError.new(try, @to)
else
result = script.Run()
if try.HasCaught()
err = JSError.new(try, @to)
else
value = @to.rb(result)
end
end
end
end
raise err if err
return value
end
def load(filename)
File.open(filename) do |file|
self.eval file, filename, 1
end
end
def [](key)
@to.open do
@to.rb @global.Get(@to.v8(key))
end
end
def []=(key, value)
@to.open do
@global.Set(@to.v8(key), @to.v8(value))
end
return value
end
def self.stack(limit = 99)
if native = C::Context::GetEntered()
global = native.Global()
cxt = global.GetHiddenValue(C::String::NewSymbol("TheRubyRacer::RubyContext")).Value()
cxt.instance_eval {@to.rb(C::StackTrace::CurrentStackTrace(limit))}
else
[]
end
end
end
module C
class Context
def enter
if block_given?
if IsEntered()
yield(self)
else
Enter()
begin
yield(self)
ensure
Exit()
end
end
end
end
end
end
end