Class: Shades::Formatter

Inherits:
Object
  • Object
show all
Defined in:
lib/shades/formatter.rb

Instance Method Summary collapse

Constructor Details

#initialize(spacer = " ") ⇒ Formatter

Returns a new instance of Formatter.



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# File 'lib/shades/formatter.rb', line 3

def initialize(spacer = " ")
  @spacer = spacer
end

Instance Method Details

#find_abs_max(m, events) ⇒ Object 



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# File 'lib/shades/formatter.rb', line 51

def find_abs_max(m, events)
  events.inject(Float::MIN) { |max, e| [max, e.measure(m).abs].max }
end

#find_longest_field(d, events) ⇒ Object 



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# File 'lib/shades/formatter.rb', line 54

def find_longest_field(d, events)
  events.inject(d.length) { |max, e| [max, e.dimension(d).length].max }
end

#pretty_text(out, events) ⇒ Object 



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# File 'lib/shades/formatter.rb', line 18

def pretty_text(out, events)
  if events.empty?
    return
  end
  metadata = events[0].metadata
  lines = []
  (events.length+1).times {|i|lines[i] = []}
  metadata.dimensions.each do |d|
    w = find_longest_field(d, events)
    row = 1
    events.each do |e|
      v = e.dimension(d)
      lines[row] << "%-#{w}s" % v
      row += 1
    end
    lines[0] << "%-#{w}s" % d
  end
  metadata.measures.each do |m|
    row = 1
    max_value = find_abs_max(m, events) + 1.0
    vlen = Integer(Math::log10(10*(max_value+1))) + 5
    w = [vlen, m.length].max
    events.each do |e|
      v = e.measure(m)
      lines[row] << "%#{w}.4f" % v
      row +=1 
    end
    lines[0] << "%-#{w}s" % m
  end
  lines.map{|l|l.join(@spacer)}.each do |line|
    out.puts line
  end
end

#text(out, events) ⇒ Object 



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# File 'lib/shades/formatter.rb', line 6

def text(out, events)
  if events.empty?
    return
  end
  metadata = events[0].metadata
  lines = []
  out.puts "# dimensions: %s" % (metadata.dimensions.join(@spacer))
  out.puts "# measures: %s"   % (metadata.measures.join(@spacer))
  events.each do |e|
    out.puts e.line
  end
end