Class: Liquid::RangeSlice

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(range, from, to, resource_limits) ⇒ RangeSlice

Returns a new instance of RangeSlice.



7
8
9
10
11
12
13
14
15
16
17
18
19
 
# File 'lib/liquid/range_slice.rb', line 7

def initialize(range, from, to, resource_limits)
  range_length = range.end - range.begin
  range_length += 1 unless range.exclude_end?
  range_length = 0 if range_length.negative?

  start = [from, 0].max
  finish = [to || range_length, range_length].min

  @first = range.begin + start
  @length = [finish - start, 0].max
  @direction = 1
  @resource_limits = resource_limits
end

Instance Attribute Details

#length ⇒ Object (readonly)

Returns the value of attribute length.



5
6
7
 
# File 'lib/liquid/range_slice.rb', line 5

def length
  @length
end

Instance Method Details

#each ⇒ Object 



25
26
27
28
29
30
31
32
33
34
 
# File 'lib/liquid/range_slice.rb', line 25

def each
  return enum_for(:each) unless block_given?

  value = @first
  @length.times do
    @resource_limits.increment_render_score(1)
    yield value
    value += @direction
  end
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


21
22
23
 
# File 'lib/liquid/range_slice.rb', line 21

def empty?
  @length.zero?
end

#reverse! ⇒ Object 



36
37
38
39
40
41
42
 
# File 'lib/liquid/range_slice.rb', line 36

def reverse!
  unless empty?
    @first += @direction * (@length - 1)
    @direction = -@direction
  end
  self
end