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module Volt
# A sub context takes in a hash of local variables that should be available
# in front of the current context. It basically proxies the local variables
# first, then failing those proxies the context.
#
# SubContext is also used for the attrs in controllers. You can pass return_nils
# to have missing values return nil (as in attrs).
class SubContext
attr_reader :locals
def initialize(locals = nil, context = nil, return_nils = false)
@locals = locals.stringify_keys if locals
@context = context
@return_nils = return_nils
end
def respond_to?(method_name)
!!((@locals && @locals[method_name.to_s]) || (@context && @context.respond_to?(method_name)))
end
def inspect
"#<SubContext #{@locals.inspect} context:#{@context.inspect}>"
end
def method_missing(method_name, *args, &block)
method_name = method_name.to_s
if @locals && @locals.key?(method_name)
obj = @locals[method_name]
# TODORW: Might get a normal proc, flag internal procs
if obj.is_a?(Proc)
obj = obj.call(*args)
end
return obj
elsif @return_nils && method_name[-1] != '='
return nil
elsif @context
return @context.send(method_name, *args, &block)
end
fail NoMethodError.new("undefined method `#{method_name}' for \"#{inspect}\":#{self.class}")
end
end
end
Version data entries
18 entries across 18 versions & 1 rubygems