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✏️ Editing: util.rb

# frozen_string_literal: true

# Load CGI.escapeHTML and CGI.escapeURIComponent.
# CRuby:
#   cgi.gem v0.1.0+ (Ruby 2.7-3.4) and Ruby 4.0+ stdlib have 'cgi/escape' and CGI.escapeHTML.
#   cgi.gem v0.3.3+ (Ruby 3.2-3.4) and Ruby 4.0+ stdlib have CGI.escapeURIComponent.
# JRuby: cgi.gem has a Java extension 'cgi/escape'.
# TruffleRuby: lib/truffle/cgi/escape.rb requires 'cgi/util'.
require 'cgi/escape'

# Load or define ERB::Escape#html_escape.
# We don't build the C extension 'cgi/escape' for JRuby, TruffleRuby, and WASM.
# miniruby (used by CRuby build scripts) also fails to load erb/escape.so.
begin
  require 'erb/escape'
rescue LoadError
  # ERB::Escape
  #
  # A subset of ERB::Util. Unlike ERB::Util#html_escape, we expect/hope
  # Rails will not monkey-patch ERB::Escape#html_escape.
  module ERB::Escape
    # :stopdoc:
    def html_escape(s)
      CGI.escapeHTML(s.to_s)
    end
    module_function :html_escape
  end
end

# ERB::Util
#
# A utility module for conversion routines, often handy in HTML generation.
module ERB::Util
  #
  # A utility method for escaping HTML tag characters in _s_.
  #
  #   require "erb"
  #   include ERB::Util
  #
  #   puts html_escape("is a > 0 & a < 10?")
  #
  # _Generates_
  #
  #   is a &gt; 0 &amp; a &lt; 10?
  #
  include ERB::Escape # html_escape
  module_function :html_escape
  alias h html_escape
  module_function :h

if CGI.respond_to?(:escapeURIComponent)
    #
    # A utility method for encoding the String _s_ as a URL.
    #
    #   require "erb"
    #   include ERB::Util
    #
    #   puts url_encode("Programming Ruby:  The Pragmatic Programmer's Guide")
    #
    # _Generates_
    #
    #   Programming%20Ruby%3A%20%20The%20Pragmatic%20Programmer%27s%20Guide
    #
    def url_encode(s)
      CGI.escapeURIComponent(s.to_s)
    end
  else # cgi.gem <= v0.3.2
    def url_encode(s)
      s.to_s.b.gsub(/[^a-zA-Z0-9_\-.~]/n) do |m|
        sprintf("%%%02X", m.unpack1("C"))
      end
    end
  end
  alias u url_encode
  module_function :u
  module_function :url_encode
end

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