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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'
# Adds patch for changes in this PRs:
#
# https://github.com/nricciar/wikicloth/pull/110
#
# The maintainers are not releasing new versions, so we
# need to patch it here.
#
# If they ever do release a version, then we can remove this file.
#
# See:
# - https://gitlab.com/gitlab-org/gitlab/-/issues/372400
# 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 Style/HashSyntax
# rubocop:disable Layout/SpaceAfterComma
# rubocop:disable Style/RescueStandardError
# 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/PerlBackrefs
# rubocop:disable Performance/StringInclude
# rubocop:disable Style/IfUnlessModifier
# rubocop:disable Layout/LineLength
# rubocop:disable Lint/UselessAssignment
# rubocop:disable Lint/RedundantStringCoercion
# rubocop:disable Style/StringLiteralsInInterpolation
# rubocop:disable Style/For
# rubocop:disable Style/SlicingWithRange
# rubocop:disable Cop/LineBreakAfterGuardClauses
# rubocop:disable Layout/MultilineHashBraceLayout
module WikiCloth
class WikiCloth
class MathExtension < Extension
# <math>latex markup</math>
#
element 'math', :skip_html => true, :run_globals => false do |buffer|
blahtex_path = @options[:blahtex_path] || '/usr/bin/blahtex'
blahtex_png_path = @options[:blahtex_png_path] || '/tmp'
blahtex_options = @options[:blahtex_options] || '--texvc-compatible-commands --mathml-version-1-fonts --disallow-plane-1 --spacing strict'
if File.exist?(blahtex_path) && @options[:math_formatter] != :google
begin
# pass tex markup to blahtex
response = IO.popen("#{blahtex_path} #{blahtex_options} --png --mathml --png-directory #{blahtex_png_path}","w+") do |pipe|
pipe.write(buffer.element_content)
pipe.close_write
pipe.gets
end
xml_response = REXML::Document.new(response).root
if @options[:blahtex_html_prefix]
# render as embedded image
file_md5 = xml_response.elements["png/md5"].text
"<img src=\"#{File.join(@options[:blahtex_html_prefix],"#{file_md5}.png")}\" />"
else
# render as mathml
html = xml_response.elements["mathml/markup"].text
"<math xmlns=\"http://www.w3.org/1998/Math/MathML\">#{xml_response.elements["mathml/markup"].children.to_s}</math>"
end
rescue => err
# blahtex error
"<span class=\"error\">#{I18n.t("unable to parse mathml", :error => err)}</span>"
end
else
# if blahtex does not exist fallback to google charts api
# This is the patched line from:
# https://github.com/nricciar/wikicloth/pull/110/files#diff-f0cb4c400957bbdcc4c97d69d2aa7f48d8ba56c5943e484863f620605d7d17d4R37
encoded_string = URI.encode_www_form_component(buffer.element_content)
"<img src=\"https://chart.googleapis.com/chart?cht=tx&chl=#{encoded_string}\" />"
end
end
end
class WikiBuffer::Var < WikiBuffer
def default_functions(name,params)
case name
when "#if"
params.first.blank? ? params[2] : params[1]
when "#switch"
match = params.first
default = nil
for p in params[1..-1]
temp = p.split("=")
if p !~ /=/ && temp.length == 1 && p == params.last
return p
elsif temp.instance_of?(Array) && !temp.empty?
test = temp.first.strip
default = temp[1..-1].join("=").strip if test == "#default"
return temp[1..-1].join("=").strip if test == match || (test == "none" && match.blank?)
end
end
default.nil? ? "" : default
when "#expr"
begin
ExpressionParser::Parser.new.parse(params.first)
rescue RuntimeError
I18n.t('expression error', :error => $!)
end
when "#ifexpr"
val = false
begin
val = ExpressionParser::Parser.new.parse(params.first)
rescue RuntimeError
end
if val
params[1]
else
params[2]
end
when "#ifeq"
if params[0] =~ /^[0-9A-Fa-f]+$/ && params[1] =~ /^[0-9A-Fa-f]+$/
params[0].to_i == params[1].to_i ? params[2] : params[3]
else
params[0] == params[1] ? params[2] : params[3]
end
when "#len"
params.first.length
when "#sub"
params.first[params[1].to_i,params[2].to_i]
when "#pad"
case params[3]
when "right"
params[0].ljust(params[1].to_i,params[2])
when "center"
params[0].center(params[1].to_i,params[2])
else
params[0].rjust(params[1].to_i,params[2])
end
when "#iferror"
params.first =~ /error/ ? params[1] : params[2]
when "#capture"
@options[:params][params.first] = params[1]
""
when "urlencode"
# This is the patched line from:
# https://github.com/nricciar/wikicloth/pull/110/files#diff-f262faf4fadb222cca87185be0fb65b3f49659abc840794cc83a736d41310fb1R170
URI.encode_www_form_component(params.first)
when "lc"
params.first.downcase
when "uc"
params.first.upcase
when "ucfirst"
params.first.capitalize
when "lcfirst"
params.first[0,1].downcase + params.first[1..-1]
when "anchorencode"
params.first.gsub(/\s+/,'_')
when "plural"
begin
expr_value = ExpressionParser::Parser.new.parse(params.first)
expr_value.to_i == 1 ? params[1] : params[2]
rescue RuntimeError
I18n.t('expression error', :error => $!)
end
when "ns"
values = {
"" => "", "0" => "",
"1" => localise_ns("Talk"), "talk" => localise_ns("Talk"),
"6" => localise_ns("File"), "file" => localise_ns("File"), "image" => localise_ns("File"),
"10" => localise_ns("Template"), "template" => localise_ns("Template"),
"14" => localise_ns("Category"), "category" => localise_ns("Category"),
"-1" => localise_ns("Special"), "special" => localise_ns("Special"),
"12" => localise_ns("Help"), "help" => localise_ns("Help"),
"-2" => localise_ns("Media"), "media" => localise_ns("Media") }
values[localise_ns(params.first,:en).gsub(/\s+/,'_').downcase]
when "#language"
WikiNamespaces.language_name(params.first)
when "#tag"
return "" if params.empty?
elem = Builder::XmlMarkup.new
return elem.tag!(params.first) if params.length == 1
return elem.tag!(params.first) { |e| e << params.last } if params.length == 2
tag_attrs = {}
params[1..-2].each do |attr|
tag_attrs[$1] = $2 if attr =~ /^\s*([\w]+)\s*=\s*"(.*)"\s*$/
end
elem.tag!(params.first,tag_attrs) { |e| e << params.last }
when "debug"
ret = nil
case params.first
when "param"
@options[:buffer].buffers.reverse.each do |b|
if b.instance_of?(WikiBuffer::HTMLElement) && b.element_name == "template"
ret = b.get_param(params[1])
end
end
ret
when "buffer"
ret = "<pre>"
buffer = @options[:buffer].buffers
buffer.each do |b|
ret += " --- #{b.class}"
ret += b.instance_of?(WikiBuffer::HTMLElement) ? " -- #{b.element_name}\n" : " -- #{b.data}\n"
end
"#{ret}</pre>"
end
end
end
end
end
end
# rubocop:enable Style/ClassAndModuleChildren
# rubocop:enable Style/HashSyntax
# rubocop:enable Layout/SpaceAfterComma
# rubocop:enable Style/RescueStandardError
# 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/PerlBackrefs
# rubocop:enable Performance/StringInclude
# rubocop:enable Style/IfUnlessModifier
# rubocop:enable Layout/LineLength
# rubocop:enable Lint/UselessAssignment
# rubocop:enable Lint/RedundantStringCoercion
# rubocop:enable Style/StringLiteralsInInterpolation
# rubocop:enable Style/For
# rubocop:enable Style/SlicingWithRange
# rubocop:enable Cop/LineBreakAfterGuardClauses
# rubocop:enable Layout/MultilineHashBraceLayout
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