Minor fixes.

[librarian.git] / librarian / functions.py

diff --git a/librarian/functions.py b/librarian/functions.py
index 6d52b84..659bb94 100644 (file)
--- a/librarian/functions.py
+++ b/librarian/functions.py
@@ -6,13 +6,16 @@
 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')
     ns[f.__name__] = f
 
 
-def reg_substitute_entities(): 
+def reg_substitute_entities():
     ENTITY_SUBSTITUTIONS = [
         (u'---', u'—'),
         (u'--', u'–'),
@@ -41,6 +44,26 @@ def reg_strip():
     _register_function(strip)
 
 
+def reg_starts_white():
+    def starts_white(context, text):
+        if isinstance(text, list):
+            text = ''.join(text)
+        if not text:
+            return False
+        return text[0].isspace()
+    _register_function(starts_white)
+
+
+def reg_ends_white():
+    def ends_white(context, text):
+        if isinstance(text, list):
+            text = ''.join(text)
+        if not text:
+            return False
+        return text[-1].isspace()
+    _register_function(ends_white)
+
+
 def reg_wrap_words():
     def wrap_words(context, text, wrapping):
         """XPath extension function automatically wrapping words in passed text"""
@@ -48,9 +71,9 @@ def reg_wrap_words():
             text = ''.join(text)
         if not wrapping:
             return text
-    
+
         words = re.split(r'\s', text)
-    
+
         line_length = 0
         lines = [[]]
         for word in words:
@@ -63,3 +86,59 @@ def reg_wrap_words():
         return '\n'.join(' '.join(line) for line in lines)
     _register_function(wrap_words)
 
+
+def reg_person_name():
+    def person_name(context, text):
+        """ Converts "Name, Forename" to "Forename Name" """
+        if isinstance(text, list):
+            text = ''.join(text)
+        return Person.from_text(text).readable()
+    _register_function(person_name)
+
+
+def reg_texcommand():
+    def texcommand(context, text):
+        """Remove non-letters"""
+        if isinstance(text, list):
+            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 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)
+