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# This file contains code based on the wikicloth project:
# https://github.com/nricciar/wikicloth
#
# Copyright (c) 2009 The wikicloth authors.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
# frozen_string_literal: true
require 'wikicloth'
require 'wikicloth/wiki_buffer/var'
require 'digest/sha2'
# Adds patch for changes in these PRs:
#
# https://github.com/nricciar/wikicloth/pull/112
# https://github.com/nricciar/wikicloth/pull/131
#
# The first fix has already been merged, but the second has not,
# and the maintainers are not releasing new versions, so we
# need to patch them here.
#
# If they ever do release a version, then we can remove this file.
#
# See:
# - https://gitlab.com/gitlab-org/gitlab/-/issues/334056#note_745336618
# - https://gitlab.com/gitlab-org/gitlab/-/issues/361266
# Guard to ensure we remember to delete this patch if they ever release a new version of wikicloth
unless Gem::Version.new(WikiCloth::VERSION) == Gem::Version.new('0.8.1')
raise 'New version of WikiCloth detected, please either update the version for this check, ' \
'or remove this patch if no longer needed'
end
# rubocop:disable Style/ClassAndModuleChildren
# rubocop:disable Layout/SpaceAroundEqualsInParameterDefault
# rubocop:disable Style/HashSyntax
# rubocop:disable Layout/SpaceAfterComma
# rubocop:disable Style/RescueStandardError
# rubocop:disable Rails/Output
# rubocop:disable Style/MethodCallWithoutArgsParentheses
# rubocop:disable Layout/EmptyLinesAroundClassBody
# rubocop:disable Metrics/AbcSize
# rubocop:disable Metrics/CyclomaticComplexity
# rubocop:disable Metrics/PerceivedComplexity
# rubocop:disable Cop/LineBreakAroundConditionalBlock
# rubocop:disable Layout/EmptyLineAfterGuardClause
# rubocop:disable Performance/ReverseEach
# rubocop:disable Style/BlockDelimiters
# rubocop:disable Layout/MultilineBlockLayout
# rubocop:disable Layout/BlockEndNewline
# rubocop:disable Style/PerlBackrefs
# rubocop:disable Style/RegexpLiteralMixedPreserve
# rubocop:disable Performance/StringInclude
# rubocop:disable Layout/LineLength
# rubocop:disable Style/RedundantSelf
# rubocop:disable Style/SymbolProc
# rubocop:disable Layout/SpaceInsideParens
module WikiCloth
class WikiCloth
def render(opt={})
self.options = { :noedit => false, :locale => I18n.default_locale, :fast => true, :output => :html, :link_handler => self.link_handler,
:params => self.params, :sections => self.sections }.merge(self.options).merge(opt)
self.options[:link_handler].params = options[:params]
I18n.locale = self.options[:locale]
data = self.sections.collect { |s| s.render(self.options) }.join
# This is the first patched line from:
# https://github.com/nricciar/wikicloth/pull/112/files#diff-eed3de11b953105f9181a6859d58f52af8912d28525fd2a289f8be184e66f531R69
data.gsub!(/<!--.*?-->/m,"")
data << "\n" if data.last(1) != "\n"
data << "garbage"
buffer = WikiBuffer.new(+'',options)
begin
if self.options[:fast]
until data.empty?
case data
when /\A\w+/
data = $'
@current_row += $&.length
buffer.add_word($&)
when /\A[^\w]+(\w|)/m
data = $'
$&.each_char { |c| add_current_char(buffer,c) }
end
end
else
data.each_char { |c| add_current_char(buffer,c) }
end
rescue => err
debug_tree = buffer.buffers.collect { |b| b.debug }.join("-->")
puts I18n.t("unknown error on line", :line => @current_line, :row => @current_row, :tree => debug_tree)
raise err
end
buffer.eof()
buffer.send("to_#{self.options[:output]}")
end
end
class WikiBuffer::Var < WikiBuffer
def to_html
return "" if will_not_be_rendered
if self.is_function?
if Extension.function_exists?(function_name)
return Extension.functions[function_name][:klass].new(@options).instance_exec( params.collect { |p| p.strip }, &Extension.functions[function_name][:block] ).to_s
end
ret = default_functions(function_name,params.collect { |p| p.strip })
ret ||= @options[:link_handler].function(function_name, params.collect { |p| p.strip })
ret.to_s
elsif self.is_param?
ret = nil
@options[:buffer].buffers.reverse.each do |b|
ret = b.get_param(params[0],params[1]) if b.instance_of?(WikiBuffer::HTMLElement) && b.element_name == "template"
break unless ret.nil?
end
ret.to_s
else
# put template at beginning of buffer
template_stack = @options[:buffer].buffers.collect { |b| b.get_param("__name") if b.instance_of?(WikiBuffer::HTMLElement) &&
b.element_name == "template" }.compact
if template_stack.last == params[0]
debug_tree = @options[:buffer].buffers.collect { |b| b.debug }.join("-->")
"<span class=\"error\">#{I18n.t('template loop detected', :tree => debug_tree)}</span>"
else
key = params[0].to_s.strip
key_options = params[1..].collect { |p| p.is_a?(Hash) ? { :name => p[:name].strip, :value => p[:value].strip } : p.strip }
key_options ||= []
key_digest = Digest::SHA256.hexdigest(key_options.to_a.sort { |x,y| (x.is_a?(Hash) ? x[:name] : x) <=> (y.is_a?(Hash) ? y[:name] : y) }.inspect)
return @options[:params][key] if @options[:params].has_key?(key)
# if we have a valid cache fragment use it
return @options[:cache][key][key_digest] unless @options[:cache].nil? || @options[:cache][key].nil? || @options[:cache][key][key_digest].nil?
ret = @options[:link_handler].include_resource(key,key_options).to_s
# This is the second patched line from:
# https://github.com/nricciar/wikicloth/pull/112/files#diff-f262faf4fadb222cca87185be0fb65b3f49659abc840794cc83a736d41310fb1R83
ret.gsub!(/<!--.*?-->/m,"") unless ret.frozen?
count = 0
tag_attr = key_options.collect { |p|
if p.instance_of?(Hash)
"#{p[:name]}=\"#{p[:value].gsub(/"/,'"')}\""
else
count += 1
"#{count}=\"#{p.gsub(/"/,'"')}\""
end
}.join(" ")
self.data = ret.blank? ? "" : "<template __name=\"#{key}\" __hash=\"#{key_digest}\" #{tag_attr}>#{ret}</template>"
""
end
end
end
end
class WikiBuffer::HTMLElement < WikiBuffer
def to_html
if NO_NEED_TO_CLOSE.include?(self.element_name)
return "<#{self.element_name} />" if SHORT_TAGS.include?(self.element_name)
return "</#{self.element_name}><#{self.element_name}>" if @tag_check == self.element_name
end
if ESCAPED_TAGS.include?(self.element_name)
# remove empty first line
self.element_content = $1 if self.element_content =~ /^\s*\n(.*)$/m
# escape all html inside this element
self.element_content = self.element_content.gsub('<','<').gsub('>','>')
# hack to fix <code><nowiki> nested mess
self.element_content = self.element_content.gsub(/<[\/]*\s*nowiki\s*>/,'')
end
case self.element_name
when "template"
@options[:link_handler].cache({ :name => self.element_attributes["__name"], :content => self.element_content, :sha256 => self.element_attributes["__hash"] })
return self.element_content
when "noinclude"
return self.in_template? ? "" : self.element_content
when "includeonly"
return self.in_template? ? self.element_content : ""
when "nowiki"
return self.element_content
when "a"
if /:\/\//.match?(self.element_attributes['href'])
return @options[:link_handler].external_link(self.element_attributes['href'], self.element_content)
elsif self.element_attributes['href'].nil? || self.element_attributes['href'] =~ /^\s*([\?\/])/
# if a element has no href attribute, or href starts with / or ?
return elem.tag!(self.element_name, self.element_attributes) { |x| x << self.element_content }
end
else
if Extension.element_exists?(self.element_name)
return Extension.html_elements[self.element_name][:klass].new(@options).instance_exec( self, &Extension.html_elements[self.element_name][:block] ).to_s
end
end
tmp = elem.tag!(self.element_name, self.element_attributes) { |x| x << self.element_content }
unless ALLOWED_ELEMENTS.include?(self.element_name)
tmp.gsub!(/[\-!\|&"\{\}\[\]]/) { |r| self.escape_char(r) }
return tmp.gsub('<', '<').gsub('>', '>')
end
tmp
end
end
end
# rubocop:enable Style/ClassAndModuleChildren
# rubocop:enable Layout/SpaceAroundEqualsInParameterDefault
# rubocop:enable Style/HashSyntax
# rubocop:enable Layout/SpaceAfterComma
# rubocop:enable Style/RescueStandardError
# rubocop:enable Rails/Output
# rubocop:enable Style/MethodCallWithoutArgsParentheses
# rubocop:enable Layout/EmptyLinesAroundClassBody
# rubocop:enable Metrics/AbcSize
# rubocop:enable Metrics/CyclomaticComplexity
# rubocop:enable Metrics/PerceivedComplexity
# rubocop:enable Cop/LineBreakAroundConditionalBlock
# rubocop:enable Layout/EmptyLineAfterGuardClause
# rubocop:enable Performance/ReverseEach
# rubocop:enable Style/BlockDelimiters
# rubocop:enable Layout/MultilineBlockLayout
# rubocop:enable Layout/BlockEndNewline
# rubocop:enable Style/PerlBackrefs
# rubocop:enable Style/RegexpLiteralMixedPreserve
# rubocop:enable Performance/StringInclude
# rubocop:enable Layout/LineLength
# rubocop:enable Style/RedundantSelf
# rubocop:enable Style/SymbolProc
# rubocop:enable Layout/SpaceInsideParens
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