Class: Publishr::LatexProcessor

Inherits:
Object
  • Object
show all
Defined in:
lib/publishr/latex_processor.rb

Instance Method Summary collapse

Constructor Details

#initialize(latex, inpath, file) ⇒ LatexProcessor

Returns a new instance of LatexProcessor.



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# File 'lib/publishr/latex_processor.rb', line 22

def initialize(latex,inpath,file)
  @lines = latex.split("\n")
  @line = ''
  @inpath = inpath
  @file = file
  @imagewidth = nil

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

Instance Method Details

#fix ⇒ Object 



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# File 'lib/publishr/latex_processor.rb', line 32

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

#process_line ⇒ Object 



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# File 'lib/publishr/latex_processor.rb', line 42

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}'

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

  # remember image size for a figure
  width = @line.match(/begin{figure}   %.*width="(.*?)"/)
  @imagewidth = width[1] if width

  # set the width of includegraphics and forget last remembered width
  if @imagewidth and @line.include? 'includegraphics'
    @line.gsub!(/\\includegraphics{(.*?)}/){"\\includegraphics[width=#{ @imagewidth.to_f/100.0 }\\textwidth]{#{ $1 }}"}
    @imagewidth = nil
  end

  # set placement attributes to figure environment
  @line.gsub! /begin{figure}   %.*class="(.*?)".*/,'begin{figure}[\1]'

  # 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)([^\d])/, '\1\\,\2\3'

  # fix LaTeX quirk with certain quotes combined with ! or ?
  @line.gsub! '!', '!{}'
  @line.gsub! '?', '?{}'

  @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