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Size: 1.23 KB
Versions: 6
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Contents
module Liquid
# Assign sets a variable in your template.
#
# {% assign foo = 'monkey' %}
#
# You can then use the variable later in the page.
#
# {{ foo }}
#
class Assign < Tag
Syntax = /(#{VariableSignature}+)\s*=\s*(.*)\s*/om
attr_reader :to, :from
def initialize(tag_name, markup, options)
super
if markup =~ Syntax
@to = $1
@from = Variable.new($2, options)
else
raise SyntaxError.new options[:locale].t("errors.syntax.assign".freeze)
end
end
def render(context)
val = @from.render(context)
context.scopes.last[@to] = val
context.resource_limits.assign_score += assign_score_of(val)
''.freeze
end
def blank?
true
end
private
def assign_score_of(val)
if val.instance_of?(String)
val.length
elsif val.instance_of?(Array) || val.instance_of?(Hash)
sum = 1
# Uses #each to avoid extra allocations.
val.each { |child| sum += assign_score_of(child) }
sum
else
1
end
end
class ParseTreeVisitor < Liquid::ParseTreeVisitor
def children
[@node.from]
end
end
end
Template.register_tag('assign'.freeze, Assign)
end
Version data entries
6 entries across 6 versions & 3 rubygems