# Encoding: UTF-8

# PublishR -- Fast publishing for ebooks and paper
# Copyright (C) 2012 Michael Franzl
# 
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
# 
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

module Publishr
  class LatexProcessor
    def initialize(latex,inpath)
      @lines = latex.split("\n")
      @line = ''
      @inpath = inpath

      @custom_fixes = File.open(File.join(@inpath,'latex_postprocessing.rb'), 'r').read if File.exists?(File.join(@inpath,'latex_postprocessing.rb'))
    end

    def fix
      processed_lines = []
      @lines.each do |l|
        @line = l
        process_line
        processed_lines << @line
      end
      processed_lines.join("\n")
    end

    def process_line
      @line.gsub! /.hypertarget{.*?}{}/, ''
      @line.gsub! /.label{.*?}/, ''

      # latex uses eps, so remove jpg ending
      @line.gsub! /(.includegraphics{.*?).jpg}/, '\1}'

      # better formatting for names, book titles and technical terms
      @line.gsub! /name\((.*?)\)/,    '\name{\1}'
      @line.gsub! /title\((.*?)\)/,   '\book{\1}'
      @line.gsub! /{\\tt (.*?)}/,     '\object{\1}'

      # covert kramdown css attributes to LaTeX environments
      @line.gsub! /{quot(.*?)}   %  class="(.*?)"/, '{quot\1\2}'
      @line.gsub! /{quote}/,                        '{quotenormal}'
      @line.gsub! /{quotation}/,                    '{quotationnormal}'

      # transform special kramdown comments to latex commands
      @line.gsub! /% (\\.*)/, '$1'

      # bind ellipsis to previous word
      @line.gsub! /(\w \\ldots{})/, '\\mbox{\1}'

      # set better space for [...]
      @line.gsub! /\[\\ldots{}\]/, '\\omission{}'

      # separate thousands, beginning with 10000
      @line.gsub! /(\d\d)(\d\d\d) /, '\1\\,\2 '

      @line.gsub! '°',  '\\textdegree'

      eval(@custom_fixes, binding) if @custom_fixes

      # use correct hyphen code for better automatic hyphenation
      @line.gsub! /(\w)-(\w)/, '\1\\hyp{}\2'


    end

  end

end