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|
module Liquid
class Block < Tag
MAX_DEPTH = 100
def initialize(tag_name, markup, options)
super
@blank = true
end
def parse(tokens)
@body = BlockBody.new
while parse_body(@body, tokens)
end
end
def render(context)
@body.render(context)
end
def blank?
@blank
end
def nodelist
@body.nodelist
end
def unknown_tag(tag, _params, _tokens)
if tag == 'else'.freeze
raise SyntaxError.new(parse_context.locale.t("errors.syntax.unexpected_else".freeze,
block_name: block_name))
elsif tag.start_with?('end'.freeze)
raise SyntaxError.new(parse_context.locale.t("errors.syntax.invalid_delimiter".freeze,
tag: tag,
block_name: block_name,
block_delimiter: block_delimiter))
else
raise SyntaxError.new(parse_context.locale.t("errors.syntax.unknown_tag".freeze, tag: tag))
end
end
def block_name
@tag_name
end
def block_delimiter
@block_delimiter ||= "end#{block_name}"
end
protected
def parse_body(body, tokens)
if parse_context.depth >= MAX_DEPTH
raise StackLevelError, "Nesting too deep".freeze
end
parse_context.depth += 1
begin
body.parse(tokens, parse_context) do |end_tag_name, end_tag_params|
@blank &&= body.blank?
return false if end_tag_name == block_delimiter
unless end_tag_name
raise SyntaxError.new(parse_context.locale.t("errors.syntax.tag_never_closed".freeze, block_name: block_name))
end
# this tag is not registered with the system
# pass it to the current block for special handling or error reporting
unknown_tag(end_tag_name, end_tag_params, tokens)
end
ensure
parse_context.depth -= 1
end
true
end
end
end
|
