1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
module Text #:nodoc:
class Table
# An array of table headers
#
attr_accessor :head
# An array of arrays (rows or separators)
#
attr_accessor :rows
# An array representing the foot of the table
attr_accessor :foot
# The vertical boundary. Default is "<tt>-</tt>"
#
attr_accessor :vertical_boundary
# The horizontal boundary. Default is "<tt>|</tt>"
#
attr_accessor :horizontal_boundary
# The boundary intersection. Default is "<tt>+</tt>"
#
attr_accessor :boundary_intersection
# The amount of padding (spaces) added to the left and right of cell contents. Default is <tt>1</tt>
#
attr_accessor :horizontal_padding
# You could create a Text::Table object by passing an options hash:
#
# table = Text::Table.new(:head => ['A', 'B'], :rows => [['a1', 'b1'], ['a2', 'b2']])
#
# Or by passing a block:
#
# table = Text::Table.new do |t|
# t.head = ['A', 'B']
# t.rows = [['a1', 'b1']]
# t.rows << ['a2', 'b2']
# end
#
# table.to_s
#
# # +----+----+
# # | A | B |
# # +----+----+
# # | a1 | b1 |
# # | a2 | b2 |
# # +----+----+
#
#
# ==== Aligning Cells and Spanning Columns
#
# Alignment and column span can be specified by passing a cell as a Hash object.
#
# The acceptable aligments are <tt>:left</tt>, <tt>:center</tt> and <tt>:right</tt>.
#
# Cells and footers are aligned to the left by default, while headers are centered by default.
#
# table = Text::Table.new do |t|
# t.head = ['Heading A', 'Heading B']
# t.rows << ['a1', 'b1']
# t.rows << ['a2', {:value => 'b2', :align => :right}]
# t.rows << ['a3', 'b3']
# t.rows << [{:value => 'a4', :colspan => 2, :align => :center}]
# end
#
# puts table
#
# # +-----------+-----------+
# # | Heading A | Heading B |
# # +-----------+-----------+
# # | a1 | b1 |
# # | a2 | b2 |
# # | a3 | b3 |
# # | a4 |
# # +-----------+-----------+
#
#
# ==== Adding a Separator
#
# You can add a separator by inserting <tt>:separator</tt> symbols between the rows.
#
# Text::Table.new :rows => [
# ['a', 'b'],
# ['c', 'd'],
# :separator,
# ['e', 'f'],
# :separator,
# ['g', 'h']
# ]
#
# # +---+---+
# # | a | b |
# # | c | d |
# # +---+---+
# # | e | f |
# # +---+---+
# # | g | h |
# # +---+---+
#
#
# ==== Other Options
#
# Cell padding and table boundaries can be modified.
#
# Text::Table.new :rows => [['a', 'b'], ['c', 'd']],
# :horizontal_padding => 3,
# :vertical_boundary => '=',
# :horizontal_boundary => ':',
# :boundary_intersection => 'O'
#
# # O=======O=======O
# # : a : b :
# # : c : d :
# # O=======O=======O
#
def initialize(options = {})
@vertical_boundary = options[:vertical_boundary ] || '-'
@horizontal_boundary = options[:horizontal_boundary ] || '|'
@boundary_intersection = options[:boundary_intersection] || '+'
@horizontal_padding = options[:horizontal_padding ] || 1
@head = options[:head]
@rows = options[:rows] || []
@foot = options[:foot]
yield self if block_given?
end
def text_table_rows #:nodoc:
rows.to_a.map {|row_input| Row.new(row_input, self)}
end
def text_table_head #:nodoc:
Row.new(
head.map {|h| hashify(h, {:align => :center})},
self
) if head
end
def text_table_foot #:nodoc:
Row.new(foot, self) if foot
end
def all_text_table_rows #:nodoc:
all = text_table_rows
all.unshift text_table_head if head
all << text_table_foot if foot
all
end
def column_widths #:nodoc:
@column_widths ||= \
all_text_table_rows.reject {|row| row.cells == :separator}.map do |row|
row.cells.map {|cell| [(cell.value.length/cell.colspan.to_f).ceil] * cell.colspan}.flatten
end.transpose.map(&:max)
end
def separator #:nodoc:
([@boundary_intersection] * 2).join(
column_widths.map {|column_width| @vertical_boundary * (column_width + 2*@horizontal_padding)}.join(@boundary_intersection)
) + "\n"
end
# Renders a pretty plain-text table.
#
def to_s
rendered_rows = [separator] + text_table_rows.map(&:to_s) + [separator]
rendered_rows.unshift [separator, text_table_head.to_s] if head
rendered_rows << [text_table_foot.to_s, separator] if foot
rendered_rows.join
end
# Aligns the cells and the footer of a column.
#
# table = Text::Table.new :rows => [%w(a bb), %w(aa bbb), %w(aaa b)]
# puts table
#
# # +-----+-----+
# # | a | bb |
# # | aa | bbb |
# # | aaa | b |
# # +-----+-----+
#
# table.align_column 2, :right
#
# # +-----+-----+
# # | a | bb |
# # | aa | bbb |
# # | aaa | b |
# # +-----+-----+
#
# Note that headers, spanned cells and cells with explicit alignments are not affected by <tt>align_column</tt>.
#
def align_column(column_number, alignment)
set_alignment = Proc.new do |row, column_number_block, alignment_block|
cell = row.find do |cell_row|
row[0...row.index(cell_row)].map {|c| c.is_a?(Hash) ? c[:colspan] || 1 : 1}.inject(0, &:+) == column_number_block - 1
end
row[row.index(cell)] = hashify(cell, {:align => alignment_block}) if cell and not(cell.is_a?(Hash) && cell[:colspan].to_i > 0)
end
rows.each do |row|
next if row == :separator
set_alignment.call(row, column_number, alignment)
end
set_alignment.call(foot, column_number, alignment) if foot
return self
end
def hashify(cell, defaults = {}) #:nodoc:
defaults.merge(cell.is_a?(Hash) ? cell : {:value => cell})
end
def inspect
"#<#{self.class}:0x#{self.__id__.to_s(16)}>"
end
end
end
|
