--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/orpg/chat/chat_util.py	Tue Jul 14 16:41:58 2009 -0500
@@ -0,0 +1,163 @@
+# utility function; see Post() in chatwnd.py
+
+import re
+import string
+
+#============================================
+# simple_html_repair(string)
+#
+# Crude html/xml parser/verifier.
+# Catches many mistyped and/or malformed
+# html tags and prevents them from causing
+# issues with the chat display (see chatwnd.py)
+# DOES NOT catch misused but properly formated
+#    html like <script> or <li> which are known
+#    to cause issues with the chat display
+#
+# Created 04-25-2005 by Snowdog
+#=============================================
+def simple_html_repair(string):
+    "Returns string with extra > symbols to isolate badly formated HTML"
+    #walk though string checking positions of < and > tags.
+    first_instance = string.find('<')
+    if first_instance == -1: return string #no html, bail out.
+
+    #strip string of an instances of ">>" and "<<" recursively
+    #while (string.find(">>") != -1):string = string.replace(">>",">")
+    while (string.find("<<") != -1):string = string.replace("<<","<")
+
+    last_start = first_instance
+    in_tag_flag = 1
+    a = first_instance + 1
+    while a < len(string):
+        if string[a] == '<':
+            if in_tag_flag == 1:
+                #attempt to figure out best place to put missing >
+                #search from last_start to current position
+                at_front = 1
+                for best_pos in range(last_start,a):
+                    if (str(string[best_pos]).isspace())and (at_front == 0):
+                        break
+                    else:
+                        at_front = 0
+                        best_pos = best_pos + 1
+                a = best_pos
+                string = string[:a]+">"+string[a:]
+                in_tag_flag = 0
+                #jump back up one character to catch the last > and reset the in_tag_flag
+                a = a - 1
+            else:
+                in_tag_flag = 1
+                last_start = a
+
+        if string[a] == '>':
+            last_start = a #found a closing tag, move start of scan block up.
+            in_tag_flag = 0
+        if (a >= (len(string)-1))and(in_tag_flag == 1):
+            #at end of string and need a closing tag marker
+            string = string +">"
+        a = a+1
+
+    #strip string of an instances of "<>"
+    string = string.replace("<>","")
+
+    #sanity check. Count the < and > characters, if there arn't enough > chars
+    #tack them on the end to avoid open-tag conditions
+    diff = string.count('<') - string.count('>')
+    if diff > 0:
+        for d in range(1,diff):
+            string = string+">"
+
+    return string
+
+def strip_unicode(txt):
+    for i in xrange(len(txt)):
+        if txt[i] not in string.printable:
+            try:
+                txt = txt.replace(txt[i], '&#' + str(ord(txt[i])) + ';')
+            except:
+                txt = txt.replace(txt[i], '{?}')
+    return txt
+
+#================================================
+# strip_script_tags(string)
+#
+# removes all script tags (start and end)
+# 04-26-2005 Snowdog
+#================================================
+def strip_script_tags(string):
+    #kill the <script> issue
+    p = re.compile( '<(\s*)(/*)[Ss][Cc][Rr][Ii][Pp][Tt](.*?)>')
+    string =  p.sub( "<!-- script tag removed //-->", string)
+    return string
+
+#================================================
+# strip_li_tags(string)
+#
+# removes all li tags (start and end)
+# 05-13-2005
+#================================================
+def strip_li_tags(string):
+    #kill the <li> issue
+    string = re.sub( r'<(\s*)[Ll][Ii](.*?)>', r'<b><font color="#000000" size=+1>*</font></b>    ', string)
+    string = re.sub( r'<(/*)[Ll][Ii](.*?)>', r'<br />', string)
+    return string
+
+#================================================
+# strip_body_tags(string)
+#
+# removes all body tags (start and end) from messages
+# should not break the setting of custom background colors
+#   through legitimate means such as the OpenRPG settings.
+# 07-27-2005 by mDuo13
+#================================================
+def strip_body_tags(string):
+    bodytag_regex = re.compile(r"""<\/?body.*?>""", re.I)
+    string = re.sub(bodytag_regex, "", string)
+    return string
+
+#================================================
+# strip_misalignment_tags(string)
+#
+# removes the alignment aspect of <p> tags, since
+# simply closing one doesn't actually fix the text
+# alignment. (I'm assuming this is a bug in wxWindows'
+# html parser.)
+# However, closing <center> tags does
+# return the text to its normal alignment, so this
+# algorithm simply closes them, allowing them to be
+# used legitimately without causing much annoyance.
+# 07-27-2005 mDuo13
+#================================================
+def strip_misalignment_tags(string):
+    alignment_regex = re.compile(r"""<p([^>]*?)align\s*=\s*('.*?'|".*?"|[^\s>]*)(.*?)>""", re.I)
+    string = re.sub(alignment_regex, "<p\\1\\3>", string)
+
+    center_regex = re.compile(r"""<center.*?>""", re.I)
+    endcenter_regex = re.compile(r"""</center.*?>""", re.I)
+    num_centertags = center_regex.findall(string)
+    num_endcentertags = endcenter_regex.findall(string)
+    if num_centertags > num_endcentertags:
+        missing_tags = len(num_centertags) - len(num_endcentertags)
+        string = string + missing_tags*"</center>"#yes, you can do this.
+    return string
+
+#================================================
+# strip_img_tags(string)
+#
+# removes all img tags (start and end)
+# 05-13-2005
+# redone 07-11-2005 by mDuo13
+#================================================
+def strip_img_tags(string):
+    #This is a Settings definable feature, Allowing users to enable or disable image display to fix the client crash due to large img posted to chat.
+    #p = re.sub( r'<(\s*)(/*)[Ii][Mm][Gg][ ][Ss][Rr][Cc][=](.*?)>', r'<!-- img tag removed //--> <a href=\3>\3</a>', string)
+
+    #this regex is substantially more powerful than the one above
+    img_tag_regex = re.compile(r"""<img.*?src\s*?=\s*('.*?'|".*?"|[^\s>]*).*?>""", re.I)
+    #this is what replaces the regex match. the \\1 refers to the URL from the previous string
+    img_repl_str = "<a href=\\1>[img]</a>"
+
+    #replaces all instances of images in the string with links
+    p = re.sub(img_tag_regex, img_repl_str, string)
+    return p