Sha256: 0d7c659e14ed641ff47a0d61679722c4917a5f5f23a3a46545dcc582ea300be6
Contents?: true
Size: 939 Bytes
Versions: 6
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Stored size: 939 Bytes
Contents
module Liquid
# decrement is used in a place where one needs to insert a counter
# into a template, and needs the counter to survive across
# multiple instantiations of the template.
# NOTE: decrement is a pre-decrement, --i,
# while increment is post: i++.
#
# (To achieve the survival, the application must keep the context)
#
# if the variable does not exist, it is created with value 0.
# Hello: {% decrement variable %}
#
# gives you:
#
# Hello: -1
# Hello: -2
# Hello: -3
#
class Decrement < Tag
def initialize(tag_name, markup, tokens)
@variable = markup.strip
super
end
def render(context)
value = context.environments.first[@variable] ||= 0
value = value - 1
context.environments.first[@variable] = value
value.to_s
end
private
end
Template.register_tag('decrement', Decrement)
end
Version data entries
6 entries across 6 versions & 2 rubygems