78 lines
1.9 KiB
Ruby
78 lines
1.9 KiB
Ruby
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
|