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File name : erb.rb

Content :

require 'tilt/template'
require 'erb'

module Tilt
  # ERB template implementation. See:
  # http://www.ruby-doc.org/stdlib/libdoc/erb/rdoc/classes/ERB.html
  class ERBTemplate < Template
    @@default_output_variable = '_erbout'

SUPPORTS_KVARGS = ::ERB.instance_method(:initialize).parameters.assoc(:key) rescue false

def self.default_output_variable
      @@default_output_variable
    end

def self.default_output_variable=(name)
      warn "#{self}.default_output_variable= has been replaced with the :outvar-option"
      @@default_output_variable = name
    end

def prepare
      @outvar = options[:outvar] || self.class.default_output_variable
      options[:trim] = '<>' if !(options[:trim] == false) && (options[:trim].nil? || options[:trim] == true)
      @engine = if SUPPORTS_KVARGS
        ::ERB.new(data, trim_mode: options[:trim], eoutvar: @outvar)
      else
        ::ERB.new(data, options[:safe], options[:trim], @outvar)
      end
    end

def precompiled_template(locals)
      source = @engine.src
      source
    end

def precompiled_preamble(locals)
      <<-RUBY
        begin
          __original_outvar = #{@outvar} if defined?(#{@outvar})
          #{super}
      RUBY
    end

def precompiled_postamble(locals)
      <<-RUBY
          #{super}
        ensure
          #{@outvar} = __original_outvar
        end
      RUBY
    end

# ERB generates a line to specify the character coding of the generated
    # source in 1.9. Account for this in the line offset.
    if RUBY_VERSION >= '1.9.0'
      def precompiled(locals)
        source, offset = super
        [source, offset + 1]
      end
    end
  end
end