Class: RMTools::TempPrinter

Inherits:
Object show all
Defined in:
lib/rmtools/console/printing.rb

Overview

transparent print: print text (or object details) and erase it

Instance Method Summary collapse

Constructor Details

#initialize(object = nil, format = nil) ⇒ TempPrinter

Returns a new instance of TempPrinter.



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# File 'lib/rmtools/console/printing.rb', line 8

def initialize object=nil, format=nil
  if @object = object
    @format = '"' + format.gsub(/:([a-z_]\w*)/, '#{@\1.inspect}') + '"'
  else
    @format = format
  end
end

Instance Method Details

#clear ⇒ Object 



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# File 'lib/rmtools/console/printing.rb', line 38

def clear
  p ""
end

#end ⇒ Object 



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# File 'lib/rmtools/console/printing.rb', line 34

def end
  @eraser = nil
end

#end! ⇒ Object 



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# File 'lib/rmtools/console/printing.rb', line 42

def end!
  clear
  self.end
end

#format_str(params_hash = nil) ⇒ Object 



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# File 'lib/rmtools/console/printing.rb', line 16

def format_str params_hash=nil
  if params_hash
    params_hash.each {|k, v| @format.sub! ":#{k}", v.inspect}
  else
    @object.instance_eval @format
  end
end

#p(str = format_str) ⇒ Object 



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# File 'lib/rmtools/console/printing.rb', line 24

def p(str=format_str)
  STDOUT << @eraser if @eraser
  cols = ENV['COLUMNS'].to_i
  astr = RUBY_VERSION < '1.9' ? UTF2ANSI[str] : str
  rows = astr.split("\n").sum {|line| 1 + line.size/cols}
  eraser = "\b" + "\r\b"*rows + " "
  @eraser = eraser + " "*cols*rows + eraser
  puts str
end