66 lines
2.2 KiB
Ruby
66 lines
2.2 KiB
Ruby
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require 'asciidoctor/extensions' unless RUBY_ENGINE == 'opal'
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include ::Asciidoctor
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module Asciidoctor
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# This addition to the parser class overrides the "is_delimited_block?"
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# method of the core parser, adding a new block delimiter of "~~~~" for open
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# blocks, which can be extended to an arbitrary number of braces to allow
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# nesting them, which is a limitation of the existing "only two dashes"
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# delimiter: https://github.com/asciidoctor/asciidoctor/issues/1121
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# The choice of tildes is based on comments in that bug.
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class Parser
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# Storing the original method so we can still call it from the overriding
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# version
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@OLD_is_delimited_block = method(:is_delimited_block?)
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# Logic here matches the original Parser#is_delimited_block? method, see
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# there for details of base implementation.
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def self.is_delimited_block? line, return_match_data = false
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# Quick check for a single brace character before forwarding to the
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# original parser method.
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if line[0] != '~'
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return @OLD_is_delimited_block.(line, return_match_data)
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else
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line_len = line.length
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if line_len <= 4
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tip = line
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tl = line_len
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else
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tip = line[0..3]
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tl = 4
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end
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# Hardcoded tilde delimiter, since that's the only thing this
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# function deals with.
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if tip == '~~~~'
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# tip is the full line when delimiter is minimum length
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if tl < 4 || tl == line_len
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if return_match_data
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context = :open
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masq = ['comment', 'example', 'literal', 'listing', 'pass', 'quote', 'sidebar', 'source', 'verse', 'admonition', 'abstract', 'partintro'].to_set
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BlockMatchData.new(context, masq, tip, tip)
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else
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true
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end
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elsif %(#{tip}#{tip[-1..-1] * (line_len - tl)}) == line
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if return_match_data
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context = :open
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masq = ['comment', 'example', 'literal', 'listing', 'pass', 'quote', 'sidebar', 'source', 'verse', 'admonition', 'abstract', 'partintro'].to_set
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BlockMatchData.new(context, masq, tip, line)
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else
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true
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end
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else
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nil
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end
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else
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nil
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end
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end
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end
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end
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end
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