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lib/liquid/tags/cycle.rb

Parent

Methods

::new
#blank?
#render

Class/Module Index

Liquid::Cycle

Cycle is usually used within a loop to alternate between values, like colors or DOM classes.

{% for item in items %}
  <div class="{% cycle 'red', 'green', 'blue' %}"> {{ item }} </div>
{% end %}

 <div class="red"> Item one </div>
 <div class="green"> Item two </div>
 <div class="blue"> Item three </div>
 <div class="red"> Item four </div>
 <div class="green"> Item five</div>

Constants

NamedSyntax
SimpleSyntax

Public Class Methods

new(tag_name, markup, tokens) click to toggle source

# File lib/liquid/tags/cycle.rb, line 18
def initialize(tag_name, markup, tokens)
  case markup
  when NamedSyntax
    @variables = variables_from_string($2)
    @name = $1
  when SimpleSyntax
    @variables = variables_from_string(markup)
    @name = "'#{@variables.to_s}'"
  else
    raise SyntaxError.new(options[:locale].t("errors.syntax.cycle"))
  end
  super
end

Public Instance Methods

blank?() click to toggle source

# File lib/liquid/tags/cycle.rb, line 46
def blank?
  false
end

render(context) click to toggle source

# File lib/liquid/tags/cycle.rb, line 32
def render(context)
  context.registers[:cycle] ||= Hash.new(0)

  context.stack do
    key = context[@name]
    iteration = context.registers[:cycle][key]
    result = context[@variables[iteration]]
    iteration += 1
    iteration  = 0  if iteration >= @variables.size
    context.registers[:cycle][key] = iteration
    result
  end
end

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