class 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, options)
click to toggle source
Calls superclass method
Liquid::Tag.new
# File lib/liquid/tags/cycle.rb, line 18 def initialize(tag_name, markup, options) super case markup when NamedSyntax @variables = variables_from_string($2) @name = Expression.parse($1) when SimpleSyntax @variables = variables_from_string(markup) @name = @variables.to_s else raise SyntaxError.new(options[:locale].t("errors.syntax.cycle".freeze)) end end
Public Instance Methods
render(context)
click to toggle source
# File lib/liquid/tags/cycle.rb, line 32 def render(context) context.registers[:cycle] ||= {} context.stack do key = context.evaluate(@name) iteration = context.registers[:cycle][key].to_i result = context.evaluate(@variables[iteration]) iteration += 1 iteration = 0 if iteration >= @variables.size context.registers[:cycle][key] = iteration result end end
Private Instance Methods
variables_from_string(markup)
click to toggle source
# File lib/liquid/tags/cycle.rb, line 48 def variables_from_string(markup) markup.split(',').collect do |var| var =~ /\s*(#{QuotedFragment})\s*/o $1 ? Expression.parse($1) : nil end.compact end