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When the block argument is omitted, the decorated Object instance is returned:
```ruby
# app/helpers/my_styled_helpers.rb
module MyStyledHelpers
def styled
with_options style: "color: red;"
end
end
# styled.link_to "I'm red", "/"
# #=> <a href="/" style="color: red;">I'm red</a>
# styled.button_tag "I'm red too!"
# #=> <button style="color: red;">I'm red too!</button>
```
38 lines
1 KiB
Ruby
38 lines
1 KiB
Ruby
# frozen_string_literal: true
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require "active_support/core_ext/hash/deep_merge"
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module ActiveSupport
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class OptionMerger # :nodoc:
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instance_methods.each do |method|
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undef_method(method) unless method.start_with?("__", "instance_eval", "class", "object_id")
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end
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def initialize(context, options)
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@context, @options = context, options
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end
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private
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def method_missing(method, *arguments, &block)
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options = nil
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if arguments.first.is_a?(Proc)
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proc = arguments.pop
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arguments << lambda { |*args| @options.deep_merge(proc.call(*args)) }
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elsif arguments.last.respond_to?(:to_hash)
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options = @options.deep_merge(arguments.pop)
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else
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options = @options
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end
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if options
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@context.__send__(method, *arguments, **options, &block)
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else
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@context.__send__(method, *arguments, &block)
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end
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end
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def respond_to_missing?(*arguments)
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@context.respond_to?(*arguments)
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end
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end
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end
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