Class: Stencil::Data

Inherits:
Object
  • Object
show all
Defined in:
lib/stencil/template.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(data) ⇒ Data

Returns a new instance of Data.



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# File 'lib/stencil/template.rb', line 18

def initialize(data)
  @data = data
  @path = []
end

Instance Attribute Details

#data ⇒ Object

Returns the value of attribute data.



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# File 'lib/stencil/template.rb', line 71

def data
  @data
end

#path ⇒ Object

Returns the value of attribute path.



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# File 'lib/stencil/template.rb', line 71

def path
  @path
end

#point ⇒ Object

Returns the value of attribute point.



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# File 'lib/stencil/template.rb', line 71

def point
  @point
end

Instance Method Details

#access(string) ⇒ Object 



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# File 'lib/stencil/template.rb', line 73

def access(string)
  data = @data
  path = relative(string)
  path.each do |segment|
    data = data[segment]
  end
  return data
end

#recontext(string) ⇒ Object 



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# File 'lib/stencil/template.rb', line 65

def recontext(string)
  result = Data.new(@data)
  result.path = relative(string)
  return result
end

#relative(string) ⇒ Object 



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# File 'lib/stencil/template.rb', line 23

def relative(string)
  path = @path.dup
  s = StringScanner.new(string||"")

  goto = s.scan(/[^:#]*/)
  g = StringScanner.new(goto)

  while g.rest?
    go = g.getch

    case go
    when "^"
      path.pop
    when "/"
      path.clear
    when "+"
      number = g.scan(/\d+/).to_i
      here = path.pop
      path.push(here + number)
    when "-"
      number = g.scan(/\d+/).to_i
      here = path.pop
      path.push(here - number)
    else 
      raise "Unrecognized path offset: #{go}"
    end
  end

  while s.rest?
    delim = s.getch
    segment = s.scan(/[^:#]*/)
      case delim
      when ":"
        path << segment
      when "#"
        path << segment.to_i
      end
  end

  path
end