Class: Karenina::Book

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(context_lines = 5) ⇒ Book

Returns a new instance of Book.



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# File 'lib/karenina/book.rb', line 8

def initialize(context_lines = 5)
  @context_lines = context_lines
  file  = File.open(Karenina::TEXT_PATH, 'r')
  @lines = file.readlines
  @mark = BookMark.new
end

Instance Attribute Details

#lines ⇒ Object (readonly)

Returns the value of attribute lines.



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# File 'lib/karenina/book.rb', line 4

def lines
  @lines
end

#mark ⇒ Object (readonly)

Returns the value of attribute mark.



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# File 'lib/karenina/book.rb', line 5

def mark
  @mark
end

Instance Method Details

#bold_line(text) ⇒ Object 



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# File 'lib/karenina/book.rb', line 68

def bold_line(text)
      output = []
      separator = ""
      80.times { separator << "-"}
      output << separator
      output << text
      output << separator
      output.join("\n")
end

#current_line ⇒ Object 



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# File 'lib/karenina/book.rb', line 15

def current_line
    @lines[@mark.line].to_s
end

#current_line_is_blank? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/karenina/book.rb', line 19

def current_line_is_blank?
    current_line =~ /^\s+$/
end

#current_line_num ⇒ Object 



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# File 'lib/karenina/book.rb', line 37

def current_line_num
  @mark.line
end

#first_line_num ⇒ Object 



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# File 'lib/karenina/book.rb', line 29

def first_line_num
  current_line_num - @context_lines > 0 ? current_line_num - @context_lines : 0
end

#last_line_num ⇒ Object 



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# File 'lib/karenina/book.rb', line 33

def last_line_num
  current_line_num + @context_lines
end

#print ⇒ Object 



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# File 'lib/karenina/book.rb', line 41

def print
  output = []
  skip_blank
   printable_line_nums.each {|line|
    text = @lines[line].to_s.chomp
    if line == current_line_num
      output << "#{bold_line(text)}"
    else
      output << "#{text}"
    end
  }
  output.join("\n") + "\n"
end

#printable_line_nums ⇒ Object 



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# File 'lib/karenina/book.rb', line 64

def printable_line_nums
  first_line_num.upto(last_line_num)
end

#skip_blank ⇒ Object 



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# File 'lib/karenina/book.rb', line 23

def skip_blank
    while current_line_is_blank?
      @mark.increment
    end
end

#to_str ⇒ Object 



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# File 'lib/karenina/book.rb', line 55

def to_str
  output = []
  printable_line_nums.each {|line|
    text = @lines[line].to_s.chomp
    output << "#{text}"
  }
  output.join("\n") + "\n"
end