273 lines
11 KiB
Ruby
273 lines
11 KiB
Ruby
# This file contains code based on the wikicloth project:
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# https://github.com/nricciar/wikicloth
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#
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# Copyright (c) 2009 The wikicloth authors.
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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# frozen_string_literal: true
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require 'wikicloth'
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require 'wikicloth/wiki_buffer/var'
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# Adds patch for changes in this PRs:
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#
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# https://github.com/nricciar/wikicloth/pull/110
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#
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# The maintainers are not releasing new versions, so we
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# need to patch it here.
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#
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# If they ever do release a version, then we can remove this file.
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#
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# See:
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# - https://gitlab.com/gitlab-org/gitlab/-/issues/372400
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# Guard to ensure we remember to delete this patch if they ever release a new version of wikicloth
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unless Gem::Version.new(WikiCloth::VERSION) == Gem::Version.new('0.8.1')
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raise 'New version of WikiCloth detected, please either update the version for this check, ' \
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'or remove this patch if no longer needed'
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end
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# rubocop:disable Style/ClassAndModuleChildren
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# rubocop:disable Style/HashSyntax
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# rubocop:disable Layout/SpaceAfterComma
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# rubocop:disable Style/RescueStandardError
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# rubocop:disable Metrics/AbcSize
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# rubocop:disable Metrics/CyclomaticComplexity
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# rubocop:disable Metrics/PerceivedComplexity
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# rubocop:disable Cop/LineBreakAroundConditionalBlock
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# rubocop:disable Layout/EmptyLineAfterGuardClause
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# rubocop:disable Performance/ReverseEach
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# rubocop:disable Style/PerlBackrefs
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# rubocop:disable Style/RedundantRegexpCharacterClass
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# rubocop:disable Performance/StringInclude
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# rubocop:disable Style/IfUnlessModifier
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# rubocop:disable Layout/LineLength
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# rubocop:disable Lint/DeprecatedClassMethods
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# rubocop:disable Lint/UselessAssignment
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# rubocop:disable Lint/RedundantStringCoercion
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# rubocop:disable Style/StringLiteralsInInterpolation
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# rubocop:disable Lint/UriEscapeUnescape
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# rubocop:disable Style/For
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# rubocop:disable Style/SlicingWithRange
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# rubocop:disable Style/GuardClause
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# rubocop:disable Style/ZeroLengthPredicate
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# rubocop:disable Cop/LineBreakAfterGuardClauses
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# rubocop:disable Layout/MultilineHashBraceLayout
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module WikiCloth
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class WikiCloth
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class MathExtension < Extension
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# <math>latex markup</math>
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#
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element 'math', :skip_html => true, :run_globals => false do |buffer|
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blahtex_path = @options[:blahtex_path] || '/usr/bin/blahtex'
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blahtex_png_path = @options[:blahtex_png_path] || '/tmp'
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blahtex_options = @options[:blahtex_options] || '--texvc-compatible-commands --mathml-version-1-fonts --disallow-plane-1 --spacing strict'
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if File.exists?(blahtex_path) && @options[:math_formatter] != :google
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begin
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# pass tex markup to blahtex
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response = IO.popen("#{blahtex_path} #{blahtex_options} --png --mathml --png-directory #{blahtex_png_path}","w+") do |pipe|
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pipe.write(buffer.element_content)
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pipe.close_write
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pipe.gets
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end
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xml_response = REXML::Document.new(response).root
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if @options[:blahtex_html_prefix]
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# render as embedded image
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file_md5 = xml_response.elements["png/md5"].text
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"<img src=\"#{File.join(@options[:blahtex_html_prefix],"#{file_md5}.png")}\" />"
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else
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# render as mathml
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html = xml_response.elements["mathml/markup"].text
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"<math xmlns=\"http://www.w3.org/1998/Math/MathML\">#{xml_response.elements["mathml/markup"].children.to_s}</math>"
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end
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rescue => err
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# blahtex error
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"<span class=\"error\">#{I18n.t("unable to parse mathml", :error => err)}</span>"
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end
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else
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# if blahtex does not exist fallback to google charts api
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# This is the patched line from:
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# https://github.com/nricciar/wikicloth/pull/110/files#diff-f0cb4c400957bbdcc4c97d69d2aa7f48d8ba56c5943e484863f620605d7d17d4R37
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encoded_string = URI.encode_www_form_component(buffer.element_content)
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"<img src=\"https://chart.googleapis.com/chart?cht=tx&chl=#{encoded_string}\" />"
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end
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end
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end
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class WikiBuffer::Var < WikiBuffer
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def default_functions(name,params)
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case name
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when "#if"
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params.first.blank? ? params[2] : params[1]
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when "#switch"
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match = params.first
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default = nil
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for p in params[1..-1]
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temp = p.split("=")
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if p !~ /=/ && temp.length == 1 && p == params.last
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return p
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elsif temp.instance_of?(Array) && temp.length > 0
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test = temp.first.strip
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default = temp[1..-1].join("=").strip if test == "#default"
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return temp[1..-1].join("=").strip if test == match || (test == "none" && match.blank?)
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end
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end
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default.nil? ? "" : default
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when "#expr"
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begin
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ExpressionParser::Parser.new.parse(params.first)
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rescue RuntimeError
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I18n.t('expression error', :error => $!)
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end
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when "#ifexpr"
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val = false
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begin
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val = ExpressionParser::Parser.new.parse(params.first)
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rescue RuntimeError
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end
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if val
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params[1]
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else
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params[2]
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end
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when "#ifeq"
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if params[0] =~ /^[0-9A-Fa-f]+$/ && params[1] =~ /^[0-9A-Fa-f]+$/
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params[0].to_i == params[1].to_i ? params[2] : params[3]
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else
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params[0] == params[1] ? params[2] : params[3]
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end
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when "#len"
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params.first.length
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when "#sub"
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params.first[params[1].to_i,params[2].to_i]
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when "#pad"
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case params[3]
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when "right"
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params[0].ljust(params[1].to_i,params[2])
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when "center"
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params[0].center(params[1].to_i,params[2])
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else
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params[0].rjust(params[1].to_i,params[2])
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end
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when "#iferror"
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params.first =~ /error/ ? params[1] : params[2]
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when "#capture"
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@options[:params][params.first] = params[1]
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""
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when "urlencode"
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# This is the patched line from:
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# https://github.com/nricciar/wikicloth/pull/110/files#diff-f262faf4fadb222cca87185be0fb65b3f49659abc840794cc83a736d41310fb1R170
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URI.encode_www_form_component(params.first)
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when "lc"
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params.first.downcase
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when "uc"
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params.first.upcase
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when "ucfirst"
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params.first.capitalize
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when "lcfirst"
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params.first[0,1].downcase + params.first[1..-1]
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when "anchorencode"
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params.first.gsub(/\s+/,'_')
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when "plural"
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begin
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expr_value = ExpressionParser::Parser.new.parse(params.first)
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expr_value.to_i == 1 ? params[1] : params[2]
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rescue RuntimeError
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I18n.t('expression error', :error => $!)
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end
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when "ns"
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values = {
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"" => "", "0" => "",
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"1" => localise_ns("Talk"), "talk" => localise_ns("Talk"),
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"6" => localise_ns("File"), "file" => localise_ns("File"), "image" => localise_ns("File"),
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"10" => localise_ns("Template"), "template" => localise_ns("Template"),
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"14" => localise_ns("Category"), "category" => localise_ns("Category"),
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"-1" => localise_ns("Special"), "special" => localise_ns("Special"),
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"12" => localise_ns("Help"), "help" => localise_ns("Help"),
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"-2" => localise_ns("Media"), "media" => localise_ns("Media") }
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values[localise_ns(params.first,:en).gsub(/\s+/,'_').downcase]
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when "#language"
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WikiNamespaces.language_name(params.first)
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when "#tag"
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return "" if params.empty?
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elem = Builder::XmlMarkup.new
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return elem.tag!(params.first) if params.length == 1
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return elem.tag!(params.first) { |e| e << params.last } if params.length == 2
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tag_attrs = {}
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params[1..-2].each do |attr|
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tag_attrs[$1] = $2 if attr =~ /^\s*([\w]+)\s*=\s*"(.*)"\s*$/
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end
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elem.tag!(params.first,tag_attrs) { |e| e << params.last }
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when "debug"
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ret = nil
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case params.first
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when "param"
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@options[:buffer].buffers.reverse.each do |b|
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if b.instance_of?(WikiBuffer::HTMLElement) && b.element_name == "template"
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ret = b.get_param(params[1])
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end
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end
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ret
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when "buffer"
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ret = "<pre>"
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buffer = @options[:buffer].buffers
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buffer.each do |b|
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ret += " --- #{b.class}"
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ret += b.instance_of?(WikiBuffer::HTMLElement) ? " -- #{b.element_name}\n" : " -- #{b.data}\n"
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end
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"#{ret}</pre>"
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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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end
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# rubocop:enable Style/ClassAndModuleChildren
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# rubocop:enable Style/HashSyntax
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# rubocop:enable Layout/SpaceAfterComma
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# rubocop:enable Style/RescueStandardError
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# rubocop:enable Metrics/AbcSize
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# rubocop:enable Metrics/CyclomaticComplexity
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# rubocop:enable Metrics/PerceivedComplexity
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# rubocop:enable Cop/LineBreakAroundConditionalBlock
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# rubocop:enable Layout/EmptyLineAfterGuardClause
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# rubocop:enable Performance/ReverseEach
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# rubocop:enable Style/PerlBackrefs
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# rubocop:enable Style/RedundantRegexpCharacterClass
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# rubocop:enable Performance/StringInclude
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# rubocop:enable Style/IfUnlessModifier
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# rubocop:enable Layout/LineLength
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# rubocop:enable Lint/DeprecatedClassMethods
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# rubocop:enable Lint/UselessAssignment
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# rubocop:enable Lint/RedundantStringCoercion
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# rubocop:enable Style/StringLiteralsInInterpolation
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# rubocop:enable Lint/UriEscapeUnescape
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# rubocop:enable Style/For
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# rubocop:enable Style/SlicingWithRange
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# rubocop:enable Style/GuardClause
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# rubocop:enable Style/ZeroLengthPredicate
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# rubocop:enable Cop/LineBreakAfterGuardClauses
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# rubocop:enable Layout/MultilineHashBraceLayout
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