Sha256: 7fc4b13a73cb101abb7b54ca502eaf86a7ef679faf872e8458545dad5cfd8bd8
Contents?: true
Size: 1.25 KB
Versions: 5
Compression:
Stored size: 1.25 KB
Contents
module Erector
def self.inline(*args, &block)
InlineWidget.new(*args, &block)
end
module Inline
# Executes the widget's block (the one that was passed in the
# constructor). Since "self" is pointing to the new widget, the block does
# not naturally have access to parent method methods, so an
# Erector::Inline widget uses some method_missing black magic to propagate
# messages to the parent object. Since it executes inside the *called*
# widget's context, when the block refers to instance variables, it's
# talking about those of this widget, not the caller. It does, of course,
# have access to bound local variables of the caller, so you can use those
# to smuggle in instance variables.
def call_block
# note that instance_eval seems to pass in self as a parameter to the block
instance_eval(&block) if block
end
private
# This is part of the sub-widget/parent feature (see #widget method).
def method_missing(name, *args, &block)
if parent && parent.respond_to?(name)
block ||= lambda {} # captures self HERE
parent.send(name, *args, &block)
else
super
end
end
end
class InlineWidget < Erector::Widget
include Inline
end
end
Version data entries
5 entries across 5 versions & 2 rubygems