Sha256: 81e550448dd52033a62b19265e40d0f25de7497312718004a115cdb8a6b4fe4e
Contents?: true
Size: 1.84 KB
Versions: 38
Compression:
Stored size: 1.84 KB
Contents
module Liquid
# If is the conditional block
#
# {% if user.admin %}
# Admin user!
# {% else %}
# Not admin user
# {% endif %}
#
# There are {% if count < 5 %} less {% else %} more {% endif %} items than you need.
#
#
class If < Block
SyntaxHelp = "Syntax Error in tag 'if' - Valid syntax: if [expression]"
Syntax = /(#{QuotedFragment})\s*([=!<>a-z_]+)?\s*(#{QuotedFragment})?/
ExpressionsAndOperators = /(?:\b(?:\s?and\s?|\s?or\s?)\b|(?:\s*(?!\b(?:\s?and\s?|\s?or\s?)\b)(?:#{QuotedFragment}|\S+)\s*)+)/
def initialize(tag_name, markup, tokens)
@blocks = []
push_block('if', markup)
super
end
def unknown_tag(tag, markup, tokens)
if ['elsif', 'else'].include?(tag)
push_block(tag, markup)
else
super
end
end
def render(context)
context.stack do
@blocks.each do |block|
if block.evaluate(context)
return render_all(block.attachment, context)
end
end
''
end
end
private
def push_block(tag, markup)
block = if tag == 'else'
ElseCondition.new
else
expressions = markup.scan(ExpressionsAndOperators).reverse
raise(SyntaxError, SyntaxHelp) unless expressions.shift =~ Syntax
condition = Condition.new($1, $2, $3)
while not expressions.empty?
operator = (expressions.shift).to_s.strip
raise(SyntaxError, SyntaxHelp) unless expressions.shift.to_s =~ Syntax
new_condition = Condition.new($1, $2, $3)
new_condition.send(operator.to_sym, condition)
condition = new_condition
end
condition
end
@blocks.push(block)
@nodelist = block.attach(Array.new)
end
end
Template.register_tag('if', If)
end
Version data entries
38 entries across 38 versions & 5 rubygems