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