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annotate mercurial/templatefilters.py @ 11297:d320e70442a5

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replace Python standard textwrap by MBCS sensitive one for i18n text Mercurial has problem around text wrapping/filling in MBCS encoding environment, because standard 'textwrap' module of Python can not treat it correctly. It splits byte sequence for one character into two lines. According to unicode specification, "east asian width" classifies characters into: W(ide), N(arrow), F(ull-width), H(alf-width), A(mbiguous) W/N/F/H can be always recognized as 2/1/2/1 bytes in byte sequence, but 'A' can not. Size of 'A' depends on language in which it is used. Unicode specification says: If the context(= language) cannot be established reliably they should be treated as narrow characters by default but many of class 'A' characters are full-width, at least, in Japanese environment. So, this patch treats class 'A' characters as full-width always for safety wrapping. This patch focuses only on MBCS safe-ness, not on writing/printing rule strict wrapping for each languages MBCS sensitive textwrap class is originally implemented by ITO Nobuaki <daydream.trippers@gmail.com>.
author FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
date Sun, 06 Jun 2010 17:20:10 +0900
parents 5974123d0339
children aff419e260f9
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1 # template-filters.py - common template expansion filters
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2 #
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3 # Copyright 2005-2008 Matt Mackall <mpm@selenic.com>
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 import cgi, re, os, time, urllib
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9 import util, encoding
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10
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11 def stringify(thing):
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12 '''turn nested template iterator into string.'''
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13 if hasattr(thing, '__iter__') and not isinstance(thing, str):
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14 return "".join([stringify(t) for t in thing if t is not None])
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15 return str(thing)
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16
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17 agescales = [("year", 3600 * 24 * 365),
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18 ("month", 3600 * 24 * 30),
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19 ("week", 3600 * 24 * 7),
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20 ("day", 3600 * 24),
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21 ("hour", 3600),
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22 ("minute", 60),
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23 ("second", 1)]
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24
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25 def age(date):
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26 '''turn a (timestamp, tzoff) tuple into an age string.'''
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27
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28 def plural(t, c):
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29 if c == 1:
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30 return t
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31 return t + "s"
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32 def fmt(t, c):
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33 return "%d %s" % (c, plural(t, c))
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34
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35 now = time.time()
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36 then = date[0]
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37 if then > now:
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38 return 'in the future'
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39
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40 delta = max(1, int(now - then))
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41 if delta > agescales[0][1] * 2:
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42 return util.shortdate(date)
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43
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44 for t, s in agescales:
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45 n = delta // s
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46 if n >= 2 or s == 1:
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47 return '%s ago' % fmt(t, n)
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48
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49 para_re = None
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50 space_re = None
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51
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52 def fill(text, width):
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53 '''fill many paragraphs.'''
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54 global para_re, space_re
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55 if para_re is None:
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56 para_re = re.compile('(\n\n|\n\\s*[-*]\\s*)', re.M)
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57 space_re = re.compile(r' +')
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58
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59 def findparas():
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60 start = 0
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61 while True:
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62 m = para_re.search(text, start)
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63 if not m:
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64 uctext = unicode(text[start:], encoding.encoding)
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65 w = len(uctext)
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66 while 0 < w and uctext[w - 1].isspace():
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67 w -= 1
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68 yield (uctext[:w].encode(encoding.encoding),
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69 uctext[w:].encode(encoding.encoding))
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70 break
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71 yield text[start:m.start(0)], m.group(1)
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72 start = m.end(1)
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73
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74 return "".join([space_re.sub(' ', util.wrap(para, width=width)) + rest
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75 for para, rest in findparas()])
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76
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77 def firstline(text):
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78 '''return the first line of text'''
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79 try:
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80 return text.splitlines(True)[0].rstrip('\r\n')
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81 except IndexError:
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82 return ''
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83
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84 def nl2br(text):
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85 '''replace raw newlines with xhtml line breaks.'''
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86 return text.replace('\n', '<br/>\n')
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87
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88 def obfuscate(text):
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89 text = unicode(text, encoding.encoding, 'replace')
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90 return ''.join(['&#%d;' % ord(c) for c in text])
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91
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92 def domain(author):
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93 '''get domain of author, or empty string if none.'''
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94 f = author.find('@')
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95 if f == -1:
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96 return ''
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97 author = author[f + 1:]
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98 f = author.find('>')
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99 if f >= 0:
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100 author = author[:f]
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101 return author
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102
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103 def person(author):
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104 '''get name of author, or else username.'''
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105 if not '@' in author:
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106 return author
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107 f = author.find('<')
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108 if f == -1:
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109 return util.shortuser(author)
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110 return author[:f].rstrip()
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111
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112 def indent(text, prefix):
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113 '''indent each non-empty line of text after first with prefix.'''
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114 lines = text.splitlines()
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115 num_lines = len(lines)
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116 endswithnewline = text[-1:] == '\n'
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117 def indenter():
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118 for i in xrange(num_lines):
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119 l = lines[i]
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120 if i and l.strip():
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121 yield prefix
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122 yield l
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123 if i < num_lines - 1 or endswithnewline:
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124 yield '\n'
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125 return "".join(indenter())
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126
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127 def permissions(flags):
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128 if "l" in flags:
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129 return "lrwxrwxrwx"
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130 if "x" in flags:
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131 return "-rwxr-xr-x"
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132 return "-rw-r--r--"
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133
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134 def xmlescape(text):
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135 text = (text
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136 .replace('&', '&amp;')
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137 .replace('<', '&lt;')
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138 .replace('>', '&gt;')
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139 .replace('"', '&quot;')
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140 .replace("'", '&#39;')) # &apos; invalid in HTML
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141 return re.sub('[\x00-\x08\x0B\x0C\x0E-\x1F]', ' ', text)
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142
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143 _escapes = [
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144 ('\\', '\\\\'), ('"', '\\"'), ('\t', '\\t'), ('\n', '\\n'),
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145 ('\r', '\\r'), ('\f', '\\f'), ('\b', '\\b'),
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146 ]
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147
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148 def jsonescape(s):
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149 for k, v in _escapes:
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150 s = s.replace(k, v)
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151 return s
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152
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153 def json(obj):
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154 if obj is None or obj is False or obj is True:
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155 return {None: 'null', False: 'false', True: 'true'}[obj]
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156 elif isinstance(obj, int) or isinstance(obj, float):
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157 return str(obj)
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158 elif isinstance(obj, str):
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159 return '"%s"' % jsonescape(obj)
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160 elif isinstance(obj, unicode):
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161 return json(obj.encode('utf-8'))
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162 elif hasattr(obj, 'keys'):
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163 out = []
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164 for k, v in obj.iteritems():
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165 s = '%s: %s' % (json(k), json(v))
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166 out.append(s)
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167 return '{' + ', '.join(out) + '}'
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168 elif hasattr(obj, '__iter__'):
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169 out = []
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170 for i in obj:
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171 out.append(json(i))
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172 return '[' + ', '.join(out) + ']'
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173 else:
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174 raise TypeError('cannot encode type %s' % obj.__class__.__name__)
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175
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176 def stripdir(text):
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177 '''Treat the text as path and strip a directory level, if possible.'''
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178 dir = os.path.dirname(text)
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179 if dir == "":
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180 return os.path.basename(text)
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181 else:
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182 return dir
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183
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184 def nonempty(str):
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185 return str or "(none)"
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186
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187 filters = {
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188 "addbreaks": nl2br,
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189 "basename": os.path.basename,
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190 "stripdir": stripdir,
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191 "age": age,
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192 "date": lambda x: util.datestr(x),
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193 "domain": domain,
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194 "email": util.email,
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195 "escape": lambda x: cgi.escape(x, True),
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196 "fill68": lambda x: fill(x, width=68),
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197 "fill76": lambda x: fill(x, width=76),
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198 "firstline": firstline,
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199 "tabindent": lambda x: indent(x, '\t'),
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200 "hgdate": lambda x: "%d %d" % x,
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201 "isodate": lambda x: util.datestr(x, '%Y-%m-%d %H:%M %1%2'),
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202 "isodatesec": lambda x: util.datestr(x, '%Y-%m-%d %H:%M:%S %1%2'),
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203 "json": json,
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204 "jsonescape": jsonescape,
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205 "localdate": lambda x: (x[0], util.makedate()[1]),
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206 "nonempty": nonempty,
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207 "obfuscate": obfuscate,
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208 "permissions": permissions,
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209 "person": person,
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210 "rfc822date": lambda x: util.datestr(x, "%a, %d %b %Y %H:%M:%S %1%2"),
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211 "rfc3339date": lambda x: util.datestr(x, "%Y-%m-%dT%H:%M:%S%1:%2"),
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212 "short": lambda x: x[:12],
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213 "shortdate": util.shortdate,
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214 "stringify": stringify,
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215 "strip": lambda x: x.strip(),
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216 "urlescape": lambda x: urllib.quote(x),
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217 "user": lambda x: util.shortuser(x),
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218 "stringescape": lambda x: x.encode('string_escape'),
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219 "xmlescape": xmlescape,
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220 }