25 lines
783 B
Ruby
25 lines
783 B
Ruby
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# frozen_string_literal: true
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module HtmlEscapedHelpers
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extend self
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# Checks if +content+ contains HTML escaped tags and returns its match.
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#
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# It matches escaped opening and closing tags `<<name>` and
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# `</<name>`. The match is discarded if the tag is inside a quoted
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# attribute value.
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# Foor example, `<div title="We allow # <b>bold</b>">`.
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#
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# @return [MatchData, nil] Returns the match or +nil+ if no match was found.
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def match_html_escaped_tags(content)
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match_data = %r{<\s*(?:/\s*)?\w+}.match(content)
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return unless match_data
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# Escaped HTML tags are allowed inside quoted attribute values like:
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# `title="Press <back>"`
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return if %r{=\s*["'][^>]*\z}.match?(match_data.pre_match)
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match_data
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end
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end
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