120 lines
2.5 KiB
Ruby
120 lines
2.5 KiB
Ruby
# This file contains redefinitions of and wrappers around various text
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# filters so they can be used as Haml filters.
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# :stopdoc:
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require 'erb'
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require 'sass/engine'
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require 'stringio'
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begin
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require 'rubygems'
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rescue LoadError; end
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class ERB; alias_method :render, :result; end
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module Haml
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module Filters
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class Plain
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def initialize(text)
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@text = text
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end
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def render
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@text
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end
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end
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class Ruby
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def initialize(text)
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@text = text
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end
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def render
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old_stdout = $stdout
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$stdout = StringIO.new
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Object.new.instance_eval(@text)
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old_stdout, $stdout = $stdout, old_stdout
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old_stdout.pos = 0
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old_stdout.read
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end
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end
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class Preserve
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def initialize(text)
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@text = text
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end
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def render
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Haml::Helpers.preserve(@text)
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end
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end
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class LazyLoaded
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def initialize(*reqs)
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reqs[0...-1].each do |req|
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begin
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@required = req
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require @required
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return
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rescue LoadError; end # RCov doesn't see this, but it is run
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end
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begin
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@required = reqs[-1]
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require @required
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rescue LoadError => e
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classname = self.class.to_s.gsub(/\w+::/, '')
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if reqs.size == 1
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raise HamlError.new("Can't run #{classname} filter; required file '#{reqs.first}' not found")
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else
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raise HamlError.new("Can't run #{classname} filter; required #{reqs.map { |r| "'#{r}'" }.join(' or ')}, but none were found")
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end
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end
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end
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end
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class RedCloth < LazyLoaded
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def initialize(text)
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super('redcloth')
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@engine = ::RedCloth.new(text)
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end
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def render
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@engine.to_html
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end
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end
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# Uses RedCloth to provide only Textile (not Markdown) parsing
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class Textile < RedCloth
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def render
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@engine.to_html(:textile)
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end
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end
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# Uses BlueCloth or RedCloth to provide only Markdown (not Textile) parsing
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class Markdown < LazyLoaded
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def initialize(text)
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super('bluecloth', 'redcloth')
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if @required == 'bluecloth'
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@engine = ::BlueCloth.new(text)
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else
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@engine = ::RedCloth.new(text)
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end
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end
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def render
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if @engine.is_a?(::BlueCloth)
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@engine.to_html
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else
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@engine.to_html(:markdown)
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end
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end
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end
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end
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end
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# :startdoc:
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