108 lines
2.3 KiB
Ruby
108 lines
2.3 KiB
Ruby
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=begin maruku_doc
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Attribute: html_math_engine
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Scope: document, element
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Output: html
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Summary: Select the rendering engine for math.
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Default: <?mrk Globals[:html_math_engine].to_s ?>
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Select the rendering engine for math.
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If you want to use your engine `foo`, then set:
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HTML math engine: foo
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{:lang=markdown}
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and then implement two functions:
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def to_html_inline_math_foo
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# You can: either return a REXML::Element
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# return Element.new 'div'
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# or return an empty array on error
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# return []
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# or have a string parsed by REXML:
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tex = self.math
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tex.gsub!('&','&')
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mathml = "<code>#{tex}</code>"
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return Document.new(mathml).root
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end
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def to_html_equation_foo
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# same thing
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...
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end
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{:lang=ruby}
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=end
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module MaRuKu; module Out; module HTML
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def to_html_inline_math
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s = get_setting(:html_math_engine)
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method = "to_html_inline_math_#{s}".to_sym
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if self.respond_to? method
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self.send method || to_html_equation_none
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else
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puts "A method called #{method} should be defined."
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return []
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end
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end
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def add_class_to(el, cl)
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el.attributes['class'] =
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if already = el.attributes['class']
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already + " " + cl
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else
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cl
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end
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end
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def to_html_equation
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s = get_setting(:html_math_engine)
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method = "to_html_equation_#{s}".to_sym
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if self.respond_to? method
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mathml = self.send(method) || to_html_equation_none
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div = create_html_element 'div'
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add_class_to(div, 'maruku-equation')
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if self.label # then numerate
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span = Element.new 'span'
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span.attributes['class'] = 'maruku-eq-number'
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num = self.num
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span << Text.new("(#{num})")
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div << span
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div.attributes['id'] = "eq:#{self.label}"
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end
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div << mathml
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source_div = Element.new 'div'
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add_class_to(source_div, 'maruku-eq-tex')
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code = to_html_equation_none
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code.attributes['style'] = 'display: none'
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source_div << code
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div << source_div
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div
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else
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puts "A method called #{method} should be defined."
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return []
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end
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end
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def to_html_eqref
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if eq = self.doc.eqid2eq[self.eqid]
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num = eq.num
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a = Element.new 'a'
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a.attributes['class'] = 'maruku-eqref'
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a.attributes['href'] = "#eq:#{self.eqid}"
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a << Text.new("(#{num})")
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a
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else
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maruku_error "Cannot find equation #{self.eqid.inspect}"
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Text.new "(#{self.eqid})"
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end
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end
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end end end
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