gitlab-org--gitlab-foss/lib/banzai/filter/blockquote_fence_filter.rb

module Banzai
  module Filter
    class BlockquoteFenceFilter < HTML::Pipeline::TextFilter
      REGEX = %r{
          (?<code>
            # Code blocks:
            # ```
            # Anything, including `>>>` blocks which are ignored by this filter
            # ```

            ^```
            .+?
            \n```\ *$
          )
        |
          (?<html>
            # HTML block:
            # <tag>
            # Anything, including `>>>` blocks which are ignored by this filter
            # </tag>

            ^<[^>]+?>\ *\n
            .+?
            \n<\/[^>]+?>\ *$
          )
        |
          (?:
            # Blockquote:
            # >>>
            # Anything, including code and HTML blocks
            # >>>

            ^>>>\ *\n
            (?<quote>
              (?:
                  # Any character that doesn't introduce a code or HTML block
                  (?!
                      ^```
                    |
                      ^<[^>]+?>\ *\n
                  )
                  .
                |
                  # A code block
                  \g<code>
                |
                  # An HTML block
                  \g<html>
              )+?
            )
            \n>>>\ *$
          )
      }mx.freeze

      def initialize(text, context = nil, result = nil)
        super text, context, result
        @text = @text.delete("\r")
      end

      def call
        @text.gsub(REGEX) do
          if $~[:quote]
            $~[:quote].gsub(/^/, "> ").gsub(/^> $/, ">")
          else
            $~[0]
          end
        end
      end
    end
  end
end
Add blockquote fence syntax to Markdown 2016-04-27 21:38:33 +00:00			`module Banzai`
			`module Filter`
			`class BlockquoteFenceFilter < HTML::Pipeline::TextFilter`
			`REGEX = %r{`
			`(?<code>`
			`# Code blocks:`
			# ```
Add more comments to regex 2016-07-10 19:47:53 +00:00			# Anything, including `>>>` blocks which are ignored by this filter
Add blockquote fence syntax to Markdown 2016-04-27 21:38:33 +00:00			# ```
Add more comments to regex 2016-07-10 19:47:53 +00:00
			^```
			`.+?`
Allow trailing whitespace on blockquote fence lines 2018-06-18 11:28:21 +00:00			\n```\ *$
Add blockquote fence syntax to Markdown 2016-04-27 21:38:33 +00:00			`)`
			`\|`
			`(?<html>`
Add more comments to regex 2016-07-10 19:47:53 +00:00			`# HTML block:`
Add blockquote fence syntax to Markdown 2016-04-27 21:38:33 +00:00			`# <tag>`
Add more comments to regex 2016-07-10 19:47:53 +00:00			# Anything, including `>>>` blocks which are ignored by this filter
Add blockquote fence syntax to Markdown 2016-04-27 21:38:33 +00:00			`# </tag>`
Add more comments to regex 2016-07-10 19:47:53 +00:00
Allow trailing whitespace on blockquote fence lines 2018-06-18 11:28:21 +00:00			`^<[^>]+?>\ *\n`
Add more comments to regex 2016-07-10 19:47:53 +00:00			`.+?`
Allow trailing whitespace on blockquote fence lines 2018-06-18 11:28:21 +00:00			`\n<\/[^>]+?>\ *$`
Add blockquote fence syntax to Markdown 2016-04-27 21:38:33 +00:00			`)`
			`\|`
Add more comments to regex 2016-07-10 19:47:53 +00:00			`(?:`
			`# Blockquote:`
			`# >>>`
			`# Anything, including code and HTML blocks`
			`# >>>`

Allow trailing whitespace on blockquote fence lines 2018-06-18 11:28:21 +00:00			`^>>>\ *\n`
Add more comments to regex 2016-07-10 19:47:53 +00:00			`(?<quote>`
Add blockquote fence syntax to Markdown 2016-04-27 21:38:33 +00:00			`(?:`
Add more comments to regex 2016-07-10 19:47:53 +00:00			`# Any character that doesn't introduce a code or HTML block`
			`(?!`
			^```
			`\|`
Allow trailing whitespace on blockquote fence lines 2018-06-18 11:28:21 +00:00			`^<[^>]+?>\ *\n`
Add more comments to regex 2016-07-10 19:47:53 +00:00			`)`
			`.`
Add blockquote fence syntax to Markdown 2016-04-27 21:38:33 +00:00			`\|`
Add more comments to regex 2016-07-10 19:47:53 +00:00			`# A code block`
Add blockquote fence syntax to Markdown 2016-04-27 21:38:33 +00:00			`\g<code>`
			`\|`
Add more comments to regex 2016-07-10 19:47:53 +00:00			`# An HTML block`
Add blockquote fence syntax to Markdown 2016-04-27 21:38:33 +00:00			`\g<html>`
Add more comments to regex 2016-07-10 19:47:53 +00:00			`)+?`
			`)`
Allow trailing whitespace on blockquote fence lines 2018-06-18 11:28:21 +00:00			`\n>>>\ *$`
Add blockquote fence syntax to Markdown 2016-04-27 21:38:33 +00:00			`)`
			`}mx.freeze`

			`def initialize(text, context = nil, result = nil)`
			`super text, context, result`
Add more comments to regex 2016-07-10 19:47:53 +00:00			`@text = @text.delete("\r")`
Add blockquote fence syntax to Markdown 2016-04-27 21:38:33 +00:00			`end`

			`def call`
			`@text.gsub(REGEX) do`
			`if $~[:quote]`
			`$~[:quote].gsub(/^/, "> ").gsub(/^> $/, ">")`
			`else`
			`$~[0]`
			`end`
			`end`
			`end`
			`end`
			`end`
			`end`