Revert of Check in a simple pure-python based Markdown previewer.

third_party/Python-Markdown/markdown/util.py

Index: third_party/Python-Markdown/markdown/util.py
diff --git a/third_party/Python-Markdown/markdown/util.py b/third_party/Python-Markdown/markdown/util.py
deleted file mode 100644
index d3d48f099940521431520bbc42eb466fd099e1fb..0000000000000000000000000000000000000000
--- a/third_party/Python-Markdown/markdown/util.py
+++ /dev/null
@@ -1,177 +0,0 @@
-# -*- coding: utf-8 -*-
-from __future__ import unicode_literals
-import re
-import sys
-
-
-"""
-Python 3 Stuff
-=============================================================================
-"""
-PY3 = sys.version_info[0] == 3
-
-if PY3:  # pragma: no cover
-    string_type = str
-    text_type = str
-    int2str = chr
-else:  # pragma: no cover
-    string_type = basestring   # noqa
-    text_type = unicode        # noqa
-    int2str = unichr           # noqa
-
-
-"""
-Constants you might want to modify
------------------------------------------------------------------------------
-"""
-
-
-BLOCK_LEVEL_ELEMENTS = re.compile(
-    "^(p|div|h[1-6]|blockquote|pre|table|dl|ol|ul"
-    "|script|noscript|form|fieldset|iframe|math"
-    "|hr|hr/|style|li|dt|dd|thead|tbody"
-    "|tr|th|td|section|footer|header|group|figure"
-    "|figcaption|aside|article|canvas|output"
-    "|progress|video|nav)$",
-    re.IGNORECASE
-)
-# Placeholders
-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]+)')
-AMP_SUBSTITUTE = STX+"amp"+ETX
-HTML_PLACEHOLDER = STX + "wzxhzdk:%s" + ETX
-HTML_PLACEHOLDER_RE = re.compile(HTML_PLACEHOLDER % r'([0-9]+)')
-TAG_PLACEHOLDER = STX + "hzzhzkh:%s" + ETX
-
-
-"""
-Constants you probably do not need to change
------------------------------------------------------------------------------
-"""
-
-RTL_BIDI_RANGES = (
-    ('\u0590', '\u07FF'),
-    # Hebrew (0590-05FF), Arabic (0600-06FF),
-    # Syriac (0700-074F), Arabic supplement (0750-077F),
-    # Thaana (0780-07BF), Nko (07C0-07FF).
-    ('\u2D30', '\u2D7F')  # Tifinagh
-)
-
-# Extensions should use "markdown.util.etree" instead of "etree" (or do `from
-# markdown.util import etree`).  Do not import it by yourself.
-
-try:  # pragma: no cover
-    # Is the C implementation of ElementTree available?
-    import xml.etree.cElementTree as etree
-    from xml.etree.ElementTree import Comment
-    # Serializers (including ours) test with non-c Comment
-    etree.test_comment = Comment
-    if etree.VERSION < "1.0.5":
-        raise RuntimeError("cElementTree version 1.0.5 or higher is required.")
-except (ImportError, RuntimeError):  # pragma: no cover
-    # Use the Python implementation of ElementTree?
-    import xml.etree.ElementTree as etree
-    if etree.VERSION < "1.1":
-        raise RuntimeError("ElementTree version 1.1 or higher is required")
-
-
-"""
-AUXILIARY GLOBAL FUNCTIONS
-=============================================================================
-"""
-
-
-def isBlockLevel(tag):
-    """Check if the tag is a block level HTML tag."""
-    if isinstance(tag, string_type):
-        return BLOCK_LEVEL_ELEMENTS.match(tag)
-    # Some ElementTree tags are not strings, so return False.
-    return False
-
-
-def parseBoolValue(value, fail_on_errors=True, preserve_none=False):
-    """Parses a string representing bool value. If parsing was successful,
-       returns True or False. If preserve_none=True, returns True, False,
-       or None. If parsing was not successful, raises  ValueError, or, if
-       fail_on_errors=False, returns None."""
-    if not isinstance(value, string_type):
-        if preserve_none and value is None:
-            return value
-        return bool(value)
-    elif preserve_none and value.lower() == 'none':
-        return None
-    elif value.lower() in ('true', 'yes', 'y', 'on', '1'):
-        return True
-    elif value.lower() in ('false', 'no', 'n', 'off', '0', 'none'):
-        return False
-    elif fail_on_errors:
-        raise ValueError('Cannot parse bool value: %r' % value)
-
-
-"""
-MISC AUXILIARY CLASSES
-=============================================================================
-"""
-
-
-class AtomicString(text_type):
-    """A string which should not be further processed."""
-    pass
-
-
-class Processor(object):
-    def __init__(self, markdown_instance=None):
-        if markdown_instance:
-            self.markdown = markdown_instance
-
-
-class HtmlStash(object):
-    """
-    This class is used for stashing HTML objects that we extract
-    in the beginning and replace with place-holders.
-    """
-
-    def __init__(self):
-        """ Create a HtmlStash. """
-        self.html_counter = 0  # for counting inline html segments
-        self.rawHtmlBlocks = []
-        self.tag_counter = 0
-        self.tag_data = []  # list of dictionaries in the order tags appear
-
-    def store(self, html, safe=False):
-        """
-        Saves an HTML segment for later reinsertion.  Returns a
-        placeholder string that needs to be inserted into the
-        document.
-
-        Keyword arguments:
-
-        * html: an html segment
-        * safe: label an html segment as safe for safemode
-
-        Returns : a placeholder string
-
-        """
-        self.rawHtmlBlocks.append((html, safe))
-        placeholder = self.get_placeholder(self.html_counter)
-        self.html_counter += 1
-        return placeholder
-
-    def reset(self):
-        self.html_counter = 0
-        self.rawHtmlBlocks = []
-
-    def get_placeholder(self, key):
-        return HTML_PLACEHOLDER % key
-
-    def store_tag(self, tag, attrs, left_index, right_index):
-        """Store tag data and return a placeholder."""
-        self.tag_data.append({'tag': tag, 'attrs': attrs,
-                              'left_index': left_index,
-                              'right_index': right_index})
-        placeholder = TAG_PLACEHOLDER % str(self.tag_counter)
-        self.tag_counter += 1  # equal to the tag's index in self.tag_data
-        return placeholder