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require 'thread'
class Formatador
class ProgressBar
attr_accessor :current, :total, :opts
def initialize(total, opts = {}, &block)
@current = opts.delete(:start) || 0
@total = total.to_i
@opts = opts
@lock = Mutex.new
@complete_proc = block_given? ? block : Proc.new { }
end
def increment(increment = 1)
@lock.synchronize do
return if complete?
@current += increment.to_i
@complete_proc.call(self) if complete?
Formatador.redisplay_progressbar(current, total, opts)
end
end
private
def complete?
current == total
end
end
def redisplay_progressbar(current, total, options = {})
options = { :color => 'white', :width => 50, :new_line => true }.merge!(options)
data = progressbar(current, total, options)
if current < total
redisplay(data, options[:width])
else
redisplay("#{data}", options[:width])
if options[:new_line]
new_line
end
@progressbar_started_at = nil
end
end
private
def progressbar(current, total, options)
color = options[:color]
started_at = options[:started_at]
width = options[:width]
output = []
if options[:label]
output << options[:label]
end
# width
# we are going to write a string that looks like " current/total"
# It would be nice if it were left padded with spaces in such a way that
# it puts the progress bar in a constant place on the page. This witdh
# calculation allows for the "current" string to be up to two characters
# longer than the "total" string without problems. eg- current =
# 9.99, total = 10
padding = total.to_s.size * 2 + 3
output << "[#{color}]%#{padding}s[/]" % "#{current}/#{total}"
percent = current.to_f / total.to_f
percent = 0 if percent < 0
percent = 1 if percent > 1
done = '*' * (percent * width).ceil
remaining = ' ' * (width - done.length)
output << "[_white_]|[/][#{color}][_#{color}_]#{done}[/]#{remaining}[_white_]|[/]"
if started_at
elapsed = Time.now - started_at
minutes = (elapsed / 60).truncate.to_s
seconds = (elapsed % 60).truncate.to_s
output << "#{minutes}:#{'0' if seconds.size < 2}#{seconds}"
end
output << ''
output.join(' ')
end
end
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