Added simple Latex support. Escaping is not satisfying yet

README.md

@@ -19,6 +19,7 @@ question.
 * Add more functionality (gap, alignment, etc.)
 * Make parsers more robust.
 * reverse ILIAS authentication mechanism for automated upload.
+* Enable LaTeX through custom lexer in mistune.
 
 ### Notes
 

gen.py

 #!/usr/local/bin/python3
 
-try:
-    import mistune
-except ImportError as err:
-    print("Please install mistune to make use of markdown parsing.")
-    print("\t pip install mistune")
-
 import importlib
 import argparse
 import os
@@ -13,8 +7,8 @@ import sys
 
 # local import
 from hallgrim.IliasXMLCreator import multi, single
-import hallgrim.parser
 from hallgrim.messages import *
+from hallgrim.parser import *
 
 
 def filename_to_module(name):
@@ -51,12 +45,12 @@ def main():
     script = importlib.import_module(filename_to_module(script_name))
     data = {
         'description': "_description",
-        'question_text': mistune.markdown(script.task),
+        'question_text': markdown(script.task),
         'author': script.meta['author'],
         'title': script.meta['title'],
         'maxattempts': '0',
         'shuffle': True,
-        'questions': hallgrim.parser.choice_parser(script.choices),
+        'questions': choice_parser(script.choices),
     }
 
     output = os.path.join(

hallgrim/parser.py

 import re
 import mistune
+import copy
+
+try:
+    from mistune import Renderer, InlineGrammar, InlineLexer, Markdown
+except ImportError as err:
+    print("Please install mistune to make use of markdown parsing.")
+    print("\t pip install mistune")
+
+
+class LaTeXRenderer(Renderer):
+    def latex(self, formula):
+        return '<span class="latex">{}</span>'.format(formula)
+
+class LaTeXInlineLexer(InlineLexer):
+    def enable_latex(self):
+        # add latex rules
+        self.rules.latex = re.compile(
+            r'\[\['                   # [[
+            r'([^\]]+)'   # Page 2|Page 2
+            r'\]\](?!\])'             # ]]
+        )
+
+        # Add latex parser to default rules
+        # you can insert it some place you like
+        # but place matters, maybe 3 is not good
+        self.default_rules.insert(3, 'latex')
+
+    def output_latex(self, m):
+        formula = m.group(1)
+
+        # you can create an custom render
+        # you can also return the html if you like
+        return self.renderer.latex(formula)
+
+def get_custom_markdown():
+    renderer = LaTeXRenderer()
+    inline = LaTeXInlineLexer(renderer)
+
+    # enable the feature
+    inline.enable_latex()
+    return Markdown(renderer, inline=inline)
+
 
 def choice_parser(raw_choices):
     lines = raw_choices.strip().split('\n')
     parse = [re.match('\[(X| )\] (.*)', line).groups() for line in lines]
-    final = [(mistune.markdown(text), True if mark == 'X' else False, 0.5) for mark, text in parse]
+    final = [(markdown(text), True if mark == 'X' else False, 0.5) for mark, text in parse]
     return final
+
+markdown = get_custom_markdown()
+

scripts/multi_proto.py

@@ -5,7 +5,7 @@ meta = {
 }
 
 task = """ Hier der Anfang der Datei `punkte.csv`, die Komma-getrennte Angaben
-zu erreichten Übungspunkten enthält:
+zu erreichten Übungspunkten enthält [[Example Formula \\sum_{i=0}^n i]]:
 
 ```
 21600001,Herr,Bollman,Fritze-Peter,15