From 579288c5eb684dd09d1ef298929a566f40151205 Mon Sep 17 00:00:00 2001
From: Waylan Limberg <waylan@gmail.com>
Date: Wed, 27 Feb 2013 09:10:47 -0500
Subject: Now using universal code for Python 2 & 3.

The most notable changes are the use of unicode_literals
and absolute_imports. Actually, absolute_imports was the
biggest deal as it gives us relative imports. For the first
time extensions import markdown relative to themselves.
This allows other packages to embed the markdown lib in a
subdir of their project and still be able to use our
extensions.
---
 markdown/util.py | 31 ++++++++++++++++++++++---------
 1 file changed, 22 insertions(+), 9 deletions(-)

(limited to 'markdown/util.py')

diff --git a/markdown/util.py b/markdown/util.py
index 34333f0..1036197 100644
--- a/markdown/util.py
+++ b/markdown/util.py
@@ -1,11 +1,24 @@
 # -*- coding: utf-8 -*-
+from __future__ import unicode_literals
 import re
+import sys
 
 
 """
-CONSTANTS
+Python 3 Stuff
 =============================================================================
 """
+PY3 = sys.version_info[0] == 3
+
+if PY3:
+    string_type = str
+    text_type = str
+    int2str = chr
+else:
+    string_type = basestring
+    text_type = unicode
+    int2str = unichr
+
 
 """
 Constants you might want to modify
@@ -19,8 +32,8 @@ BLOCK_LEVEL_ELEMENTS = re.compile("^(p|div|h[1-6]|blockquote|pre|table|dl|ol|ul"
                                   "|figcaption|aside|article|canvas|output"
                                   "|progress|video)$", re.IGNORECASE)
 # Placeholders
-STX = u'\u0002'  # Use STX ("Start of text") for start-of-placeholder
-ETX = u'\u0003'  # Use ETX ("End of text") for end-of-placeholder
+STX = '\u0002'  # Use STX ("Start of text") for start-of-placeholder
+ETX = '\u0003'  # Use ETX ("End of text") for end-of-placeholder
 INLINE_PLACEHOLDER_PREFIX = STX+"klzzwxh:"
 INLINE_PLACEHOLDER = INLINE_PLACEHOLDER_PREFIX + "%s" + ETX
 INLINE_PLACEHOLDER_RE = re.compile(INLINE_PLACEHOLDER % r'([0-9]{4})')
@@ -31,11 +44,11 @@ Constants you probably do not need to change
 -----------------------------------------------------------------------------
 """
 
-RTL_BIDI_RANGES = ( (u'\u0590', u'\u07FF'),
+RTL_BIDI_RANGES = ( ('\u0590', '\u07FF'),
                      # Hebrew (0590-05FF), Arabic (0600-06FF),
                      # Syriac (0700-074F), Arabic supplement (0750-077F),
                      # Thaana (0780-07BF), Nko (07C0-07FF).
-                    (u'\u2D30', u'\u2D7F'), # Tifinagh
+                    ('\u2D30', '\u2D7F'), # Tifinagh
                     )
 
 # Extensions should use "markdown.util.etree" instead of "etree" (or do `from
@@ -63,7 +76,7 @@ AUXILIARY GLOBAL FUNCTIONS
 
 def isBlockLevel(tag):
     """Check if the tag is a block level HTML tag."""
-    if isinstance(tag, basestring):
+    if isinstance(tag, string_type):
         return BLOCK_LEVEL_ELEMENTS.match(tag)
     # Some ElementTree tags are not strings, so return False.
     return False
@@ -73,18 +86,18 @@ MISC AUXILIARY CLASSES
 =============================================================================
 """
 
-class AtomicString(unicode):
+class AtomicString(text_type):
     """A string which should not be further processed."""
     pass
 
 
-class Processor:
+class Processor(object):
     def __init__(self, markdown_instance=None):
         if markdown_instance:
             self.markdown = markdown_instance
 
 
-class HtmlStash:
+class HtmlStash(object):
     """
     This class is used for stashing HTML objects that we extract
     in the beginning and replace with place-holders.
-- 
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