Class: InOut

Inherits:
Object
  • Object
show all
Defined in:
lib/rust/helpers/io.rb

Overview

Created by me on 2011-12-13.

Copyright (c) 2011. All pwnage reserved.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(stdin = STDIN, stdout = STDOUT, stderr = STDERR, keys = {}) ⇒ InOut

Returns a new instance of InOut.



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# File 'lib/rust/helpers/io.rb', line 9

def initialize(stdin=STDIN, stdout=STDOUT, stderr=STDERR, keys={})
  @in = stdin
  @out = stdout
  @err = stderr
  @keys = keys
end

Instance Attribute Details

#backspace_limit ⇒ Object

Returns the value of attribute backspace_limit.



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# File 'lib/rust/helpers/io.rb', line 7

def backspace_limit
  @backspace_limit
end

#line ⇒ Object

Returns the value of attribute line.



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# File 'lib/rust/helpers/io.rb', line 7

def line
  @line
end

Instance Method Details

#ask(something) ⇒ Object 



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# File 'lib/rust/helpers/io.rb', line 28

def ask(something)
  @line = ''
  @backspace_limit = 0
  tell something

  while character = get_character()
    # check for special keystrokes
    (@keys[character].call; next) if @keys[character]
    # honor backspace and delete
    if character == 127 or character == 8
      @line.slice!(-1, 1)
      @backspace_limit -= 1
      
      # Respect tab
#      elsif character == 9
      
    else
      @line << character.chr
      @backspace_limit = @line.size
    end
    # looking for carriage return (decimal 13) or
    # newline (decimal 10) in raw input
    break if character == 13 or character == 10
    if character == 127 or character == 8 
      # only backspace if we have characters on the line to
      # eliminate, otherwise we'll tromp over the prompt
      if @backspace_limit >= 0 then
        @out.print("\b#{ERASE_CHAR}")
      else 
        # do nothing
      end
    else
      @out.print(character.chr)
    end
    @out.flush
  end
  @out.print "\n"
  return @line
end

#err(txt, exception = nil) ⇒ Object 



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# File 'lib/rust/helpers/io.rb', line 68

def err(txt, exception=nil)
  if exception.nil?
    @out.puts("Unexpected error - #{txt}")
  else
    @out.puts("#{txt}\n#{exception.class}: #{exception.message}\n#{exception.backtrace.map {|l| "  #{l}\n"}}")
  end
  @out.flush
end

#say(text) ⇒ Object

Stolen from HighLine (by James Edward Grey II and Greg Brown)



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# File 'lib/rust/helpers/io.rb', line 23

def say(text)
  @out.puts(text)
  @out.flush
end

#silence ⇒ Object

Silence him!



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# File 'lib/rust/helpers/io.rb', line 79

def silence
  @old_in, @old_out, @old_err = @in, @out, @err
  @in, @out, @err = StringIO.new, StringIO.new, StringIO.new
  @silenced = true
end

#silenced? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rust/helpers/io.rb', line 85

def silenced?()
  @silenced
end

#speak ⇒ Object

It’s cool. He can talk now and we’ll set the old stuff to DEAD



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# File 'lib/rust/helpers/io.rb', line 92

def speak
  @silenced = false 
  @in, @out, @err = @old_in, @old_out, @old_err
  [@old_in, @old_out, @old_err].each {|var| }
end

#tell(text) ⇒ Object 



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# File 'lib/rust/helpers/io.rb', line 16

def tell(text)
  @out.print(text)
  @out.flush
end