lib/glimmer/dsl/observe_expression.rb
# Copyright (c) 2007-2024 Andy Maleh
#
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# a copy of this software and associated documentation files (the
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# without limitation the rights to use, copy, modify, merge, publish,
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# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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require 'glimmer/data_binding/observer'
require 'glimmer/data_binding/model_binding'
module Glimmer
module DSL
module ObserveExpression
REGEX_NESTED_OR_INDEXED_PROPERTY = /([^\[]+)(\[[^\]]+\])?/
def can_interpret?(parent, keyword, *args, &block)
keyword == 'observe' and
block_given? and
(args.size >= 1) and
(args[1].nil? || args[1].is_a?(Hash) || textual?(args[1]))
end
def interpret(parent, keyword, *args, &block)
observer = DataBinding::Observer.proc(&block)
if args[1].to_s.match(REGEX_NESTED_OR_INDEXED_PROPERTY)
observer_registration = observer.observe(DataBinding::ModelBinding.new(*args))
else
observer_registration = observer.observe(*args)
end
observer_registration
end
end
end
end