Mercurial > traipse_dev

annotate orpg/chat/chat_util.py @ 0:4385a7d0efd1 grumpy-goblin

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Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
author sirebral
date Tue, 14 Jul 2009 16:41:58 -0500
parents
children 449a8900f9ac
rev   line source
0
4385a7d0efd1 Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
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1 # utility function; see Post() in chatwnd.py
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2
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3 import re
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4 import string
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5
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6 #============================================
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7 # simple_html_repair(string)
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8 #
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9 # Crude html/xml parser/verifier.
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10 # Catches many mistyped and/or malformed
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11 # html tags and prevents them from causing
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12 # issues with the chat display (see chatwnd.py)
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13 # DOES NOT catch misused but properly formated
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14 # html like <script> or <li> which are known
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15 # to cause issues with the chat display
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16 #
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17 # Created 04-25-2005 by Snowdog
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18 #=============================================
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19 def simple_html_repair(string):
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20 "Returns string with extra > symbols to isolate badly formated HTML"
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21 #walk though string checking positions of < and > tags.
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22 first_instance = string.find('<')
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23 if first_instance == -1: return string #no html, bail out.
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24
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25 #strip string of an instances of ">>" and "<<" recursively
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26 #while (string.find(">>") != -1):string = string.replace(">>",">")
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27 while (string.find("<<") != -1):string = string.replace("<<","<")
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28
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29 last_start = first_instance
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30 in_tag_flag = 1
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31 a = first_instance + 1
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32 while a < len(string):
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33 if string[a] == '<':
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34 if in_tag_flag == 1:
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35 #attempt to figure out best place to put missing >
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36 #search from last_start to current position
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37 at_front = 1
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38 for best_pos in range(last_start,a):
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39 if (str(string[best_pos]).isspace())and (at_front == 0):
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40 break
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41 else:
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42 at_front = 0
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43 best_pos = best_pos + 1
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44 a = best_pos
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45 string = string[:a]+">"+string[a:]
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46 in_tag_flag = 0
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47 #jump back up one character to catch the last > and reset the in_tag_flag
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48 a = a - 1
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49 else:
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50 in_tag_flag = 1
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51 last_start = a
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52
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53 if string[a] == '>':
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54 last_start = a #found a closing tag, move start of scan block up.
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55 in_tag_flag = 0
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56 if (a >= (len(string)-1))and(in_tag_flag == 1):
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57 #at end of string and need a closing tag marker
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58 string = string +">"
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59 a = a+1
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60
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61 #strip string of an instances of "<>"
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62 string = string.replace("<>","")
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63
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64 #sanity check. Count the < and > characters, if there arn't enough > chars
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65 #tack them on the end to avoid open-tag conditions
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66 diff = string.count('<') - string.count('>')
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67 if diff > 0:
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68 for d in range(1,diff):
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69 string = string+">"
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70
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71 return string
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72
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73 def strip_unicode(txt):
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74 for i in xrange(len(txt)):
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75 if txt[i] not in string.printable:
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76 try:
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77 txt = txt.replace(txt[i], '&#' + str(ord(txt[i])) + ';')
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78 except:
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79 txt = txt.replace(txt[i], '{?}')
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80 return txt
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81
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82 #================================================
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83 # strip_script_tags(string)
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84 #
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85 # removes all script tags (start and end)
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86 # 04-26-2005 Snowdog
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87 #================================================
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88 def strip_script_tags(string):
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89 #kill the <script> issue
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90 p = re.compile( '<(\s*)(/*)[Ss][Cc][Rr][Ii][Pp][Tt](.*?)>')
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91 string = p.sub( "<!-- script tag removed //-->", string)
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92 return string
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93
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94 #================================================
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95 # strip_li_tags(string)
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96 #
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97 # removes all li tags (start and end)
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98 # 05-13-2005
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99 #================================================
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100 def strip_li_tags(string):
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101 #kill the <li> issue
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102 string = re.sub( r'<(\s*)[Ll][Ii](.*?)>', r'<b><font color="#000000" size=+1>*</font></b> ', string)
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103 string = re.sub( r'<(/*)[Ll][Ii](.*?)>', r'<br />', string)
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104 return string
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105
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106 #================================================
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107 # strip_body_tags(string)
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108 #
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109 # removes all body tags (start and end) from messages
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110 # should not break the setting of custom background colors
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111 # through legitimate means such as the OpenRPG settings.
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112 # 07-27-2005 by mDuo13
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113 #================================================
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114 def strip_body_tags(string):
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115 bodytag_regex = re.compile(r"""<\/?body.*?>""", re.I)
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116 string = re.sub(bodytag_regex, "", string)
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117 return string
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118
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119 #================================================
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120 # strip_misalignment_tags(string)
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121 #
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122 # removes the alignment aspect of <p> tags, since
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123 # simply closing one doesn't actually fix the text
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124 # alignment. (I'm assuming this is a bug in wxWindows'
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125 # html parser.)
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126 # However, closing <center> tags does
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127 # return the text to its normal alignment, so this
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128 # algorithm simply closes them, allowing them to be
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129 # used legitimately without causing much annoyance.
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130 # 07-27-2005 mDuo13
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131 #================================================
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132 def strip_misalignment_tags(string):
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133 alignment_regex = re.compile(r"""<p([^>]*?)align\s*=\s*('.*?'|".*?"|[^\s>]*)(.*?)>""", re.I)
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134 string = re.sub(alignment_regex, "<p\\1\\3>", string)
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135
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136 center_regex = re.compile(r"""<center.*?>""", re.I)
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137 endcenter_regex = re.compile(r"""</center.*?>""", re.I)
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138 num_centertags = center_regex.findall(string)
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139 num_endcentertags = endcenter_regex.findall(string)
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140 if num_centertags > num_endcentertags:
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141 missing_tags = len(num_centertags) - len(num_endcentertags)
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142 string = string + missing_tags*"</center>"#yes, you can do this.
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143 return string
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144
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145 #================================================
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146 # strip_img_tags(string)
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147 #
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148 # removes all img tags (start and end)
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149 # 05-13-2005
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150 # redone 07-11-2005 by mDuo13
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151 #================================================
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152 def strip_img_tags(string):
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153 #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.
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154 #p = re.sub( r'<(\s*)(/*)[Ii][Mm][Gg][ ][Ss][Rr][Cc][=](.*?)>', r'<!-- img tag removed //--> <a href=\3>\3</a>', string)
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155
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156 #this regex is substantially more powerful than the one above
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157 img_tag_regex = re.compile(r"""<img.*?src\s*?=\s*('.*?'|".*?"|[^\s>]*).*?>""", re.I)
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158 #this is what replaces the regex match. the \\1 refers to the URL from the previous string
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159 img_repl_str = "<a href=\\1>[img]</a>"
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160
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161 #replaces all instances of images in the string with links
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162 p = re.sub(img_tag_regex, img_repl_str, string)
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163 return p