554 lines
16 KiB
Ruby
554 lines
16 KiB
Ruby
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# -*- coding: utf-8 -*-
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#
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#--
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# Copyright (C) 2009-2010 Thomas Leitner <t_leitner@gmx.at>
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#
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# This file is part of kramdown.
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#
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# kramdown is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#++
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#
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require 'set'
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module Kramdown
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module Converter
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# Converts a Kramdown::Document to LaTeX. This converter uses ideas from other Markdown-to-LaTeX
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# converters like Pandoc and Maruku.
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class Latex < Base
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# :stopdoc:
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# Initialize the LaTeX converter with the given Kramdown document +doc+.
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def initialize(doc)
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super
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#TODO: set the footnote counter at the beginning of the document
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@doc.options[:footnote_nr]
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@doc.conversion_infos[:packages] = Set.new
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end
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def convert(el, opts = {})
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send("convert_#{el.type}", el, opts)
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end
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def inner(el, opts)
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result = ''
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el.children.each do |inner_el|
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result << send("convert_#{inner_el.type}", inner_el, opts)
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end
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result
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end
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def convert_root(el, opts)
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inner(el, opts)
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end
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def convert_blank(el, opts)
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""
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end
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def convert_text(el, opts)
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escape(el.value)
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end
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def convert_p(el, opts)
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"#{inner(el, opts)}\n\n"
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end
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def convert_codeblock(el, opts)
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show_whitespace = el.options[:attr] && el.options[:attr]['class'].to_s =~ /\bshow-whitespaces\b/
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lang = el.options[:attr] && el.options[:attr]['lang']
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if show_whitespace || lang
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result = "\\lstset{showspaces=%s,showtabs=%s}\n" % (show_whitespace ? ['true', 'true'] : ['false', 'false'])
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result += "\\lstset{language=#{lang}}\n" if lang
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result += "\\lstset{basicstyle=\\ttfamily\\footnotesize}\\lstset{columns=fixed,frame=tlbr}\n"
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"#{result}\\begin{lstlisting}#{attribute_list(el)}\n#{el.value}\n\\end{lstlisting}\n"
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else
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"\\begin{verbatim}#{el.value}\\end{verbatim}\n"
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end
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end
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def latex_environment(type, el, text)
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"\\begin{#{type}}#{attribute_list(el)}\n#{text}\n\\end{#{type}}\n"
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end
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def convert_blockquote(el, opts)
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latex_environment('quote', el, inner(el, opts))
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end
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HEADER_TYPES = {
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1 => 'section',
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2 => 'subsection',
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3 => 'subsubsection',
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4 => 'paragraph',
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5 => 'subparagraph',
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6 => 'subparagraph'
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}
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def convert_header(el, opts)
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type = HEADER_TYPES[el.options[:level]]
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if ((el.options[:attr] && (id = el.options[:attr]['id'])) ||
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(@doc.options[:auto_ids] && (id = generate_id(el.options[:raw_text])))) &&
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(@doc.options[:toc_depth] <= 0 || el.options[:level] <= @doc.options[:toc_depth])
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"\\hypertarget{#{id}}{}\\#{type}{#{inner(el, opts)}}\\label{#{id}}\n\n"
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else
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"\\#{type}*{#{inner(el, opts)}}\n\n"
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end
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end
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def convert_hr(el, opts)
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"\\begin{center}#{attribute_list(el)}\n\\rule{3in}{0.4pt}\n\\end{center}\n"
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end
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def convert_ul(el, opts)
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if !@doc.conversion_infos[:has_toc] && (el.options[:ial][:refs].include?('toc') rescue nil)
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@doc.conversion_infos[:has_toc] = true
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'\tableofcontents'
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else
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latex_environment(el.type == :ul ? 'itemize' : 'enumerate', el, inner(el, opts))
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end
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end
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alias :convert_ol :convert_ul
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def convert_dl(el, opts)
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latex_environment('description', el, inner(el, opts))
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end
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def convert_li(el, opts)
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"\\item #{inner(el, opts).sub(/\n+\Z/, '')}\n"
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end
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def convert_dt(el, opts)
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"\\item[#{inner(el, opts)}] "
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end
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def convert_dd(el, opts)
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"#{inner(el, opts)}\n\n"
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end
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def convert_html_element(el, opts)
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if el.value == 'i'
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"\\emph{#{inner(el, opts)}}"
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elsif el.value == 'b'
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"\\emph{#{inner(el, opts)}}"
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else
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@doc.warnings << "Can't convert HTML element"
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''
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end
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end
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def convert_xml_comment(el, opts)
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el.value.split(/\n/).map {|l| "% #{l}"}.join("\n") + "\n"
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end
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def convert_xml_pi(el, opts)
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@doc.warnings << "Can't convert XML PI/HTML document type"
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''
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end
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alias :convert_html_doctype :convert_xml_pi
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TABLE_ALIGNMENT_CHAR = {:default => 'l', :left => 'l', :center => 'c', :right => 'r'}
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def convert_table(el, opts)
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align = el.options[:alignment].map {|a| TABLE_ALIGNMENT_CHAR[a]}.join('|')
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"\\begin{tabular}{|#{align}|}#{attribute_list(el)}\n\\hline\n#{inner(el, opts)}\\hline\n\\end{tabular}\n\n"
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end
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def convert_thead(el, opts)
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"#{inner(el, opts)}\\hline\n"
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end
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def convert_tbody(el, opts)
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inner(el, opts)
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end
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def convert_tfoot(el, opts)
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"\\hline \\hline \n#{inner(el, opts)}"
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end
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def convert_tr(el, opts)
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el.children.map {|c| send("convert_#{c.type}", c, opts)}.join(' & ') + "\\\\\n"
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end
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def convert_td(el, opts)
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inner(el, opts)
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end
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alias :convert_th :convert_td
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def convert_comment(el, opts)
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el.value.split(/\n/).map {|l| "% #{l}"}.join("\n") + "\n"
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end
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def convert_br(el, opts)
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"\\newline\n"
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end
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def convert_a(el, opts)
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url = el.options[:attr]['href']
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if url =~ /^#/
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"\\hyperlink{#{url[1..-1]}}{#{inner(el, opts)}}"
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else
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"\\href{#{url}}{#{inner(el, opts)}}"
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end
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end
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def convert_img(el, opts)
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if el.options[:attr]['src'] =~ /^(https?|ftps?):\/\//
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@doc.warnings << "Cannot include non-local image"
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''
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elsif !el.options[:attr]['src'].empty?
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@doc.conversion_infos[:packages] << 'graphicx'
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"\\includegraphics{#{el.options[:attr]['src']}}"
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else
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@doc.warnings << "Cannot include image with empty path"
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''
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end
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end
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def convert_codespan(el, opts)
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"{\\tt #{escape(el.value)}}"
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end
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def convert_footnote(el, opts)
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@doc.conversion_infos[:packages] << 'fancyvrb'
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"\\footnote{#{inner(@doc.parse_infos[:footnotes][el.options[:name]][:content], opts)}}"
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end
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def convert_raw(el, opts)
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escape(el.value)
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end
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def convert_em(el, opts)
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"\\emph{#{inner(el, opts)}}"
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end
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def convert_strong(el, opts)
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"\\textbf{#{inner(el, opts)}}"
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end
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# Inspired by Maruku: entity conversion table based on the one from htmltolatex
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# (http://sourceforge.net/projects/htmltolatex/), with some small adjustments/additions
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ENTITY_CONV_TABLE = {
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913 => ['$A$'],
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914 => ['$B$'],
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915 => ['$\Gamma$'],
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916 => ['$\Delta$'],
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917 => ['$E$'],
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918 => ['$Z$'],
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919 => ['$H$'],
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920 => ['$\Theta$'],
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921 => ['$I$'],
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922 => ['$K$'],
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923 => ['$\Lambda$'],
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924 => ['$M$'],
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925 => ['$N$'],
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926 => ['$\Xi$'],
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927 => ['$O$'],
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928 => ['$\Pi$'],
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929 => ['$P$'],
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931 => ['$\Sigma$'],
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932 => ['$T$'],
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933 => ['$Y$'],
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934 => ['$\Phi$'],
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935 => ['$X$'],
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936 => ['$\Psi$'],
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937 => ['$\Omega$'],
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945 => ['$\alpha$'],
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946 => ['$\beta$'],
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947 => ['$\gamma$'],
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948 => ['$\delta$'],
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949 => ['$\epsilon$'],
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950 => ['$\zeta$'],
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951 => ['$\eta$'],
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952 => ['$\theta$'],
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953 => ['$\iota$'],
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954 => ['$\kappa$'],
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955 => ['$\lambda$'],
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956 => ['$\mu$'],
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957 => ['$\nu$'],
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958 => ['$\xi$'],
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959 => ['$o$'],
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960 => ['$\pi$'],
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961 => ['$\rho$'],
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963 => ['$\sigma$'],
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964 => ['$\tau$'],
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965 => ['$\upsilon$'],
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966 => ['$\phi$'],
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967 => ['$\chi$'],
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968 => ['$\psi$'],
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969 => ['$\omega$'],
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962 => ['$\varsigma$'],
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977 => ['$\vartheta$'],
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982 => ['$\varpi$'],
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8230 => ['\ldots'],
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8242 => ['$\prime$'],
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8254 => ['-'],
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8260 => ['/'],
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8472 => ['$\wp$'],
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8465 => ['$\Im$'],
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8476 => ['$\Re$'],
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8501 => ['$\aleph$'],
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8226 => ['$\bullet$'],
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8482 => ['$^{\rm TM}$'],
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8592 => ['$\leftarrow$'],
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8594 => ['$\rightarrow$'],
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8593 => ['$\uparrow$'],
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8595 => ['$\downarrow$'],
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8596 => ['$\leftrightarrow$'],
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8629 => ['$\hookleftarrow$'],
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8657 => ['$\Uparrow$'],
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8659 => ['$\Downarrow$'],
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8656 => ['$\Leftarrow$'],
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8658 => ['$\Rightarrow$'],
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8660 => ['$\Leftrightarrow$'],
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8704 => ['$\forall$'],
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8706 => ['$\partial$'],
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8707 => ['$\exists$'],
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8709 => ['$\emptyset$'],
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8711 => ['$\nabla$'],
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8712 => ['$\in$'],
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8715 => ['$\ni$'],
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8713 => ['$\notin$'],
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8721 => ['$\sum$'],
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8719 => ['$\prod$'],
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8722 => ['$-$'],
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8727 => ['$\ast$'],
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8730 => ['$\surd$'],
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8733 => ['$\propto$'],
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8734 => ['$\infty$'],
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8736 => ['$\angle$'],
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8743 => ['$\wedge$'],
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8744 => ['$\vee$'],
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8745 => ['$\cup$'],
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8746 => ['$\cap$'],
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8747 => ['$\int$'],
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8756 => ['$\therefore$', 'amssymb'],
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8764 => ['$\sim$'],
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8776 => ['$\approx$'],
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8773 => ['$\cong$'],
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8800 => ['$\neq$'],
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8801 => ['$\equiv$'],
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8804 => ['$\leq$'],
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8805 => ['$\geq$'],
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8834 => ['$\subset$'],
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8835 => ['$\supset$'],
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8838 => ['$\subseteq$'],
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8839 => ['$\supseteq$'],
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8836 => ['$\nsubset$', 'amssymb'],
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8853 => ['$\oplus$'],
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8855 => ['$\otimes$'],
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8869 => ['$\perp$'],
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8901 => ['$\cdot$'],
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8968 => ['$\rceil$'],
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8969 => ['$\lceil$'],
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8970 => ['$\lfloor$'],
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8971 => ['$\rfloor$'],
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9001 => ['$\rangle$'],
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9002 => ['$\langle$'],
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9674 => ['$\lozenge$', 'amssymb'],
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9824 => ['$\spadesuit$'],
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9827 => ['$\clubsuit$'],
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9829 => ['$\heartsuit$'],
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9830 => ['$\diamondsuit$'],
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38 => ['\&'],
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34 => ['"'],
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39 => ['\''],
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169 => ['\copyright'],
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60 => ['\textless{}'],
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62 => ['\textgreater{}'],
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338 => ['\OE'],
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339 => ['\oe'],
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352 => ['\v{S}'],
|
||
|
|
353 => ['\v{s}'],
|
||
|
|
376 => ['\"Y'],
|
||
|
|
710 => ['\textasciicircum'],
|
||
|
|
732 => ['\textasciitilde'],
|
||
|
|
8211 => ['--'],
|
||
|
|
8212 => ['---'],
|
||
|
|
8216 => ['`'],
|
||
|
|
8217 => ['\''],
|
||
|
|
8220 => ['``'],
|
||
|
|
8221 => ['\'\''],
|
||
|
|
8224 => ['\dag'],
|
||
|
|
8225 => ['\ddag'],
|
||
|
|
8240 => ['\permil', 'wasysym'],
|
||
|
|
8364 => ['\euro', 'eurosym'],
|
||
|
|
8249 => ['\guilsinglleft'],
|
||
|
|
8250 => ['\guilsinglright'],
|
||
|
|
8218 => ['\quotesinglbase', 'mathcomp'],
|
||
|
|
8222 => ['\quotedblbase', 'mathcomp'],
|
||
|
|
402 => ['\textflorin', 'mathcomp'],
|
||
|
|
381 => ['\v{Z}'],
|
||
|
|
382 => ['\v{z}'],
|
||
|
|
160 => ['\nolinebreak'],
|
||
|
|
161 => ['\textexclamdown'],
|
||
|
|
163 => ['\pounds'],
|
||
|
|
164 => ['\currency', 'wasysym'],
|
||
|
|
165 => ['\textyen', 'textcomp'],
|
||
|
|
166 => ['\brokenvert', 'wasysym'],
|
||
|
|
167 => ['\S'],
|
||
|
|
171 => ['\guillemotleft'],
|
||
|
|
187 => ['\guillemotright'],
|
||
|
|
174 => ['\textregistered'],
|
||
|
|
170 => ['\textordfeminine'],
|
||
|
|
172 => ['$\neg$'],
|
||
|
|
176 => ['$\degree$', 'mathabx'],
|
||
|
|
177 => ['$\pm$'],
|
||
|
|
180 => ['\''],
|
||
|
|
181 => ['$\mu$'],
|
||
|
|
182 => ['\P'],
|
||
|
|
183 => ['$\cdot$'],
|
||
|
|
186 => ['\textordmasculine'],
|
||
|
|
162 => ['\cent', 'wasysym'],
|
||
|
|
185 => ['$^1$'],
|
||
|
|
178 => ['$^2$'],
|
||
|
|
179 => ['$^3$'],
|
||
|
|
189 => ['$\frac{1}{2}$'],
|
||
|
|
188 => ['$\frac{1}{4}$'],
|
||
|
|
190 => ['$\frac{3}{4}'],
|
||
|
|
192 => ['\`A'],
|
||
|
|
193 => ['\\\'A'],
|
||
|
|
194 => ['\^A'],
|
||
|
|
195 => ['\~A'],
|
||
|
|
196 => ['\"A'],
|
||
|
|
197 => ['\AA'],
|
||
|
|
198 => ['\AE'],
|
||
|
|
199 => ['\cC'],
|
||
|
|
200 => ['\`E'],
|
||
|
|
201 => ['\\\'E'],
|
||
|
|
202 => ['\^E'],
|
||
|
|
203 => ['\"E'],
|
||
|
|
204 => ['\`I'],
|
||
|
|
205 => ['\\\'I'],
|
||
|
|
206 => ['\^I'],
|
||
|
|
207 => ['\"I'],
|
||
|
|
208 => ['$\eth$', 'amssymb'],
|
||
|
|
209 => ['\~N'],
|
||
|
|
210 => ['\`O'],
|
||
|
|
211 => ['\\\'O'],
|
||
|
|
212 => ['\^O'],
|
||
|
|
213 => ['\~O'],
|
||
|
|
214 => ['\"O'],
|
||
|
|
215 => ['$\times$'],
|
||
|
|
216 => ['\O'],
|
||
|
|
217 => ['\`U'],
|
||
|
|
218 => ['\\\'U'],
|
||
|
|
219 => ['\^U'],
|
||
|
|
220 => ['\"U'],
|
||
|
|
221 => ['\\\'Y'],
|
||
|
|
222 => ['\Thorn', 'wasysym'],
|
||
|
|
223 => ['\ss'],
|
||
|
|
224 => ['\`a'],
|
||
|
|
225 => ['\\\'a'],
|
||
|
|
226 => ['\^a'],
|
||
|
|
227 => ['\~a'],
|
||
|
|
228 => ['\"a'],
|
||
|
|
229 => ['\aa'],
|
||
|
|
230 => ['\ae'],
|
||
|
|
231 => ['\cc'],
|
||
|
|
232 => ['\`e'],
|
||
|
|
233 => ['\\\'e'],
|
||
|
|
234 => ['\^e'],
|
||
|
|
235 => ['\"e'],
|
||
|
|
236 => ['\`i'],
|
||
|
|
237 => ['\\\'i'],
|
||
|
|
238 => ['\^i'],
|
||
|
|
239 => ['\"i'],
|
||
|
|
240 => ['$\eth$'],
|
||
|
|
241 => ['\~n'],
|
||
|
|
242 => ['\`o'],
|
||
|
|
243 => ['\\\'o'],
|
||
|
|
244 => ['\^o'],
|
||
|
|
245 => ['\~o'],
|
||
|
|
246 => ['\"o'],
|
||
|
|
247 => ['$\divide$'],
|
||
|
|
248 => ['\o'],
|
||
|
|
249 => ['\`u'],
|
||
|
|
250 => ['\\\'u'],
|
||
|
|
251 => ['\^u'],
|
||
|
|
252 => ['\"u'],
|
||
|
|
253 => ['\\\'y'],
|
||
|
|
254 => ['\thorn', 'wasysym'],
|
||
|
|
255 => ['\"y'],
|
||
|
|
}
|
||
|
|
ENTITY_CONV_TABLE.each {|k,v| ENTITY_CONV_TABLE[k] = v.unshift(v.shift + '{}')}
|
||
|
|
|
||
|
|
def convert_entity(el, opts)
|
||
|
|
text, package = ENTITY_CONV_TABLE[el.value.code_point]
|
||
|
|
if text
|
||
|
|
@doc.conversion_infos[:packages] << package if package
|
||
|
|
text
|
||
|
|
else
|
||
|
|
@doc.warnings << "Couldn't find entity in substitution table!"
|
||
|
|
''
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
TYPOGRAPHIC_SYMS = {
|
||
|
|
:mdash => '---', :ndash => '--', :hellip => '\ldots{}',
|
||
|
|
:laquo_space => '\guillemotleft{}~', :raquo_space => '~\guillemotright{}',
|
||
|
|
:laquo => '\guillemotleft{}', :raquo => '\guillemotright{}'
|
||
|
|
}
|
||
|
|
def convert_typographic_sym(el, opts)
|
||
|
|
TYPOGRAPHIC_SYMS[el.value]
|
||
|
|
end
|
||
|
|
|
||
|
|
SMART_QUOTE_SYMS = {:lsquo => '`', :rsquo => '\'', :ldquo => '``', :rdquo => '\'\''}
|
||
|
|
def convert_smart_quote(el, opts)
|
||
|
|
SMART_QUOTE_SYMS[el.value]
|
||
|
|
end
|
||
|
|
|
||
|
|
def convert_math(el, opts)
|
||
|
|
@doc.conversion_infos[:packages] += %w[amssymb amsmath amsthm amsfonts]
|
||
|
|
if el.options[:category] == :block
|
||
|
|
if el.value =~ /\A\s*\\begin\{/
|
||
|
|
el.value
|
||
|
|
else
|
||
|
|
latex_environment('displaymath', el, el.value)
|
||
|
|
end
|
||
|
|
else
|
||
|
|
"$#{el.value}$"
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
def convert_abbreviation(el, opts)
|
||
|
|
el.value
|
||
|
|
end
|
||
|
|
|
||
|
|
ESCAPE_MAP = {
|
||
|
|
"^" => "\\^{}",
|
||
|
|
"\\" => "\\textbackslash{}",
|
||
|
|
"~" => "\\ensuremath{\\sim}",
|
||
|
|
"|" => "\\textbar{}",
|
||
|
|
"<" => "\\textless{}",
|
||
|
|
">" => "\\textgreater{}"
|
||
|
|
}.merge(Hash[*("{}$%&_#".scan(/./).map {|c| [c, "\\#{c}"]}.flatten)])
|
||
|
|
ESCAPE_RE = Regexp.union(*ESCAPE_MAP.collect {|k,v| k})
|
||
|
|
|
||
|
|
def escape(str)
|
||
|
|
str.gsub(ESCAPE_RE) {|m| ESCAPE_MAP[m]}
|
||
|
|
end
|
||
|
|
|
||
|
|
def attribute_list(el)
|
||
|
|
attrs = (el.options[:attr] || {}).map {|k,v| v.nil? ? '' : " #{k}=\"#{v.to_s}\""}.compact.sort.join('')
|
||
|
|
attrs = " % #{attrs}" if !attrs.empty?
|
||
|
|
attrs
|
||
|
|
end
|
||
|
|
|
||
|
|
end
|
||
|
|
|
||
|
|
end
|
||
|
|
end
|