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37 lines
819 B
Ruby
37 lines
819 B
Ruby
# Define the skeleton of an algorithm in an operation, deferring some steps to
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# subclasses. Template method lets subclasses redefine certain steps of an
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# algorithm without changing the algorithm's structure.
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module Template
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#mandatory_methods = ["tagname", "content"]
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#optional_methods = ["font_size", "background_color"]
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def generate
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string = "<#{tagname}"
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styles = ''
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styles += "font-size:#{font_size};" if respond_to? :font_size
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styles += "background-color:#{background_color};" if respond_to? :background_color
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string += " style='#{styles}'" if !styles.empty?
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string += ">#{content}</#{tagname}>"
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end
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end
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class Body
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def tagname
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"body"
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end
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def content
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"hello"
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end
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def font_size
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"18pt"
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end
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include Template
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end
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# Usage
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body = Body.new
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body.generate |