Class: Moonshot::UnicodeTable

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

Overview

A class for drawing hierarchical information using unicode lines.

Instance Method Summary collapse

Constructor Details

#initialize(name) ⇒ UnicodeTable

Returns a new instance of UnicodeTable.



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# File 'lib/moonshot/unicode_table.rb', line 8

def initialize(name)
  @name = name
  @lines = []
  @children = []
end

Instance Method Details

#add_leaf(name) ⇒ Object 



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# File 'lib/moonshot/unicode_table.rb', line 14

def add_leaf(name)
  new_leaf = UnicodeTable.new(name)
  @children << new_leaf
  new_leaf
end

#add_line(line) ⇒ Object 



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# File 'lib/moonshot/unicode_table.rb', line 20

def add_line(line)
  @lines << line
  self
end

#add_table(table) ⇒ Object 



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# File 'lib/moonshot/unicode_table.rb', line 25

def add_table(table)
  # Calculate widths
  widths = []
  table.each do |line|
    line.each_with_index do |col, i|
      col = '?' unless col.respond_to?(:length)
      widths[i] = [widths[i] || 0, col.length].max
    end
  end

  format = widths.collect { |n| "%-#{n}s" }.join(' ') << "\n"
  table.each { |line| add_line(format(format, *line)) }
end

#draw(depth = 1, first = true) ⇒ Object 



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# File 'lib/moonshot/unicode_table.rb', line 39

def draw(depth = 1, first = true)
  space = ' '
  pipe = '|'
  print first ? '┌' : '├'
  print '─' * depth
  puts "#{space}" << @name.light_black # rubocop:disable Style/RedundantInterpolation
  @lines = [''] + @lines + ['']
  @lines.each do |line|
    puts "#{pipe}" << (' ' * depth) << line # rubocop:disable Style/RedundantInterpolation
  end
  @children.each do |child|
    child.draw(depth + 1, false)
  end
end

#draw_children ⇒ Object

Draw all children at the same level, for having multiple top-level peer leaves.



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# File 'lib/moonshot/unicode_table.rb', line 56

def draw_children
  first = true
  @children.each do |child|
    child.draw(1, first)
    first = false
  end
  puts '└──'
end