lib/review/latexutils.rb in review-0.6.0 vs lib/review/latexutils.rb in review-0.9.0

@@ -12,33 +12,42 @@
 module ReVIEW
 
   module LaTeXUtils
 
     MATACHARS = {
-      '#'  => '\symbol{"23}',
-      "$"  => '\symbol{"24}',
+      '#'  => '\#',
+      "$"  => '\textdollar{}',
       '%' => '\%',
       '&' => '\&',
       '{' => '\{',
       '}' => '\}',
-      '_'  => '\symbol{"5F}',
+      '_'  => '\textunderscore{}',
       '^' => '\textasciicircum{}',
       '~' => '\textasciitilde{}',
       '|' => '\textbar{}',
-      '<'  => '\symbol{"3C}',
-      '>'  => '\symbol{"3E}',
-      "\\" => '\symbol{"5C}'
+      '<'  => '\textless{}',
+      '>'  => '\textgreater{}',
+      "\\" => '\reviewbackslash{}'
     }
 
     METACHARS_RE = /[#{Regexp.escape(MATACHARS.keys.join(''))}]/
 
+    MATACHARS_INVERT = MATACHARS.invert
+
     def escape_latex(str)
       str.gsub(METACHARS_RE) {|s|
         MATACHARS[s] or raise "unknown trans char: #{s}"
       }
     end
 
     alias escape escape_latex
+
+    def unescape_latex(str)
+      metachars_invert_re = Regexp.new(MATACHARS_INVERT.keys.collect{|key|  Regexp.escape(key)}.join('|'))
+      str.gsub(metachars_invert_re) {|s|
+        MATACHARS_INVERT[s] or raise "unknown trans char: #{s}"
+      }
+    end
 
     def escape_index(str)
       str.gsub(/[@!|"]/) {|s| '"' + s }
     end