Class: Interactive

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

Constant Summary collapse

KEY_TOP = 
"\e[A"
KEY_RIGHT = 
"\e[C"
KEY_DOWN = 
"\e[B"
KEY_LEFT = 
"\e[D"
KEY_BACKSPACE = 
"\x7F"
KEY_ENTER = 
"\r"
KEY_CTRL_C = 
"\x03"
KEY_TAB = 
"\t"
KEY_ESCAPE = 
"\e"
SEQ_ERASE_LEFT = 
"\e[D"
SEQ_ERASE_TO_END_OF_LINE = 
"\033[K"

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Interactive

Returns a new instance of Interactive.



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# File 'lib/interactive.rb', line 15

def initialize
  @term_width = `/usr/bin/env tput cols`.to_i
  @formatter = TaskFormatter.new

  if @term_width < @formatter.max_width
    message = " Your terminal must be at least #{@formatter.max_width} columns wide "
    STDERR.puts('<' + message.
                  rjust(@formatter.max_width + 1 - message.length / 2, '-').
                  ljust(@formatter.max_width - 2, '-') + '>')
    exit(1)
  end
end

Instance Method Details

#interactive_edit(tasks) ⇒ Object 



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# File 'lib/interactive.rb', line 78

def interactive_edit(tasks)
  @tasks = tasks
  @deleted_tasks = []
  @header = '2015-06-03  ' + '[↑|↓] navigate, [⇽|⇾] adjust time, [⇐ ] remove, [↵ |q] save, [esc] cancel'.grey

  @task_selected = 0

  loop do
    print_tasks
    input = read_char

    exit if [KEY_CTRL_C, KEY_ESCAPE].include? input
    return @deleted_tasks if [KEY_ENTER, 'q'].include? input

    top_down = { KEY_DOWN => +1, KEY_TOP => -1 }
    if top_down.keys.include? input
      @task_selected += top_down[input]
      @task_selected %= @tasks.length
    end
    left_right = { KEY_RIGHT => +300, KEY_LEFT => -300 }
    if left_right.keys.include? input
      time = @tasks[@task_selected].duration
      time = [time - (time % 300) + left_right[input], 0].max
      @tasks[@task_selected].duration = time
      @tasks[@task_selected].edited_at = Time.now
    end
    if input == KEY_BACKSPACE
      next if @tasks.length <= 1
      @tasks[@task_selected].deleted_at = Time.now
      @deleted_tasks << @tasks[@task_selected]
      @tasks.delete_at(@task_selected)
      @task_selected -= 1 if @task_selected == @tasks.length
      @task_selected %= @tasks.length
    end
  end

end

#print_tasks ⇒ Object 



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# File 'lib/interactive.rb', line 56

def print_tasks
  task_len = TaskFormatter.max_length(@tasks)

  puts @header
  @tasks.each_with_index do |task, i|
    @formatter.format(task, task_len)

    print "\e[47m" + "\e[30m" if i == @task_selected
    print @formatter.line_for_interactive
    print "\e[0m" if i == @task_selected
    print '  ' + @formatter.sync_status
    print "\033[K"
    puts ''
  end
  total_time = Utils.format_time(@tasks.map(&:duration).reduce(:+))
  puts "\e[100m  #{''.ljust(task_len, ' ')} #{total_time}  #{''.rjust(@formatter.bar_size, ' ')}  \e[0m\033[K"

  puts "\033[K"
  print "\033[#{@tasks.length + 3}A"
end

#read_char ⇒ Object 



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# File 'lib/interactive.rb', line 28

def read_char
  begin
    # save previous state of stty
    old_state = `stty -g`
    # disable echoing and enable raw (not having to press enter)
    system "stty raw -echo"
    c = STDIN.getc.chr
    # gather next two characters of special keys
    if (c=="\e")
      extra_thread = Thread.new {
        c = c + STDIN.getc.chr
        c = c + STDIN.getc.chr
      }
      # wait just long enough for special keys to get swallowed
      extra_thread.join(0.00001)
      # kill thread so not-so-long special keys don't wait on getc
      extra_thread.kill
    end
  rescue => ex
    puts "#{ex.class}: #{ex.message}"
    puts ex.backtrace
  ensure
    # restore previous state of stty
    system "stty #{old_state}"
  end
  return c
end