Class: Table

Inherits:
Object show all
Defined in:
lib/muflax/table.rb

Overview

Copyright Steffie Dorn <[email protected]>, 2017 License: GNU GPLv3 (or later) <www.gnu.org/copyleft/gpl.html>

Instance Method Summary collapse

Constructor Details

#initialize(separator: "\t", alignment: :left) ⇒ Table 



7
8
9
10
11
12
13
14
15
16
17
18
 
# File 'lib/muflax/table.rb', line 7

def initialize separator: "\t", alignment: :left
  @rows       = []
  @lengths    = []
  @separator  = separator
  @just       = case alignment
                when :left   ; :ljust
                when :right  ; :rjust
                when :center ; :center
                else
                  raise "invalid alignment: #{alignment}"
                end
end

Instance Method Details

#<<(row) ⇒ Object 



23
24
25
26
27
28
29
30
31
 
# File 'lib/muflax/table.rb', line 23

def <<(row)
  row.each.with_index do |x, i|
    l = @lengths[i] || 0
    s = x.str_length
    @lengths[i] = s if s > l
  end

  @rows << row
end

#[](row) ⇒ Object 



20
 
# File 'lib/muflax/table.rb', line 20

def [](row)     ; @rows[row]      ; end

#[]=(row, x) ⇒ Object 



21
 
# File 'lib/muflax/table.rb', line 21

def []=(row, x) ; @rows[row] = x  ; end

#render(out) ⇒ Object 



33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
 
# File 'lib/muflax/table.rb', line 33

def render out
  @rows.each.with_index do |row, row_i|
    row.each.with_index do |elem, elem_i|
      len = @lengths[elem_i]
      next if len.nil?

      # align element based on how much it's internally longer than it appears
      aligned = if not elem.nil?
                  elem_diff = elem.to_s.length - elem.str_length
                  elem.send(@just, len + elem_diff)
                else
                  " "*len
                end

      if elem_i == (row.size - 1)
        out.write(aligned.rstrip)
      else
        out.write(aligned)
        out.write(@separator)
      end
    end
    out.write("\n") unless row_i == (@rows.size - 1)
  end
end

#to_s ⇒ Object 



58
59
60
 
# File 'lib/muflax/table.rb', line 58

def to_s
  render(StringIO.new).string
end