X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/97c2ca65d7891091b690ce69c130fcb0c3767695..1f8cf8e0244045ed2b2a8efcff5d6db967ac2b11:/librarian/functions.py

diff --git a/librarian/functions.py b/librarian/functions.py
index b88a7fb..e5a47d6 100644
--- a/librarian/functions.py
+++ b/librarian/functions.py
@@ -3,12 +3,15 @@
 # This file is part of Librarian, licensed under GNU Affero GPLv3 or later.
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
+from __future__ import unicode_literals
+
 from lxml import etree
 import re
 
 from librarian.dcparser import Person
 from librarian import get_resource
 
+
 def _register_function(f):
     """ Register extension function with lxml """
     ns = etree.FunctionNamespace('http://wolnelektury.pl/functions')
@@ -16,7 +19,7 @@ def _register_function(f):
 
 
 def reg_substitute_entities():
-    ENTITY_SUBSTITUTIONS = [
+    entity_substitutions = [
         (u'---', u'—'),
         (u'--', u'–'),
         (u'...', u'…'),
@@ -28,7 +31,7 @@ def reg_substitute_entities():
         """XPath extension function converting all entites in passed text."""
         if isinstance(text, list):
             text = ''.join(text)
-        for entity, substitutution in ENTITY_SUBSTITUTIONS:
+        for entity, substitutution in entity_substitutions:
             text = text.replace(entity, substitutution)
         return text
 
@@ -103,21 +106,45 @@ def reg_texcommand():
             text = ''.join(text)
         return re.sub(r'[^a-zA-Z]', '', text).strip()
     _register_function(texcommand)
-    
+
+
 def reg_lang_code_3to2():
-	def lang_code_3to2(context, text):
-		"""Convert 3-letter language code to 2-letter code"""
-		result = ''
-		text = ''.join(text)
-		with open(get_resource('res/ISO-639-2_8859-1.txt'), 'rb') as f:
-			for line in f:
-				list = line.strip().split('|')
-				if list[0] == text:
-					result=list[2]
-		if result == '':
-			return text
-		else:
-			return result
-	_register_function(lang_code_3to2)
+    def lang_code_3to2(context, text):
+        """Convert 3-letter language code to 2-letter code"""
+        result = ''
+        text = ''.join(text)
+        with open(get_resource('res/ISO-639-2_8859-1.txt'), 'rb') as f:
+            for line in f.read().decode('latin1').split('\n'):
+                list = line.strip().split('|')
+                if list[0] == text:
+                    result = list[2]
+        if result == '':
+            return text
+        else:
+            return result
+    _register_function(lang_code_3to2)
+
+
+def mathml_latex(context, trees):
+    from librarian.embeds.mathml import MathML
+    text = MathML(trees[0]).to_latex().data
+    # Remove invisible multiplications, they produce unwanted spaces.
+    text = text.replace(u'\u2062', '')
+    return text
+
+
+def reg_mathml_latex():
+    _register_function(mathml_latex)
+
 
+def reg_mathml_epub(zipf):
+    from librarian.embeds.mathml import MathML
 
+    def mathml(context, trees):
+        data = MathML(trees[0]).to_latex().to_png().data
+        name = "math%d.png" % mathml.count
+        mathml.count += 1
+        zipf.writestr('OPS/' + name, data)
+        return name
+    mathml.count = 0
+    _register_function(mathml)