From bb00fc58cf0e08c07c5705c55cf7c9d5dcf94595 Mon Sep 17 00:00:00 2001
From: Yuri Takhteyev <yuri@freewisdom.org>
Date: Tue, 1 Jul 2008 23:13:02 -0700
Subject: Using control characters for HTML placeholders

---
 markdown.py | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/markdown.py b/markdown.py
index 422cde4..0b1e325 100644
--- a/markdown.py
+++ b/markdown.py
@@ -108,8 +108,11 @@ EXECUTABLE_NAME_FOR_USAGE = "python markdown.py"
 # --------------- CONSTANTS YOU _SHOULD NOT_ HAVE TO CHANGE ----------
 
 # a template for html placeholders
-HTML_PLACEHOLDER_PREFIX = "qaodmasdkwaspemas"
-HTML_PLACEHOLDER = HTML_PLACEHOLDER_PREFIX + "%dajkqlsmdqpakldnzsdfls"
+START = u'\u0001'
+END = u'\u0002'
+NULL = u'\u0001'
+HTML_PLACEHOLDER_PREFIX = START+"html"+NULL
+HTML_PLACEHOLDER = HTML_PLACEHOLDER_PREFIX + "%d"+END+"html"+NULL
 
 BLOCK_LEVEL_ELEMENTS = ['p', 'div', 'blockquote', 'pre', 'table',
                         'dl', 'ol', 'ul', 'script', 'noscript',
@@ -1951,6 +1954,10 @@ class Markdown:
             return u""
 
         # Fixup the source text
+
+        for controlChar in (START, END, NULL) :
+            self.source = self.source.replace(controlChar, "")
+
         self.source = self.source.replace("\r\n", "\n").replace("\r", "\n")
         self.source += "\n\n"
         self.source = self.source.expandtabs(TAB_LENGTH)
-- 
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