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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, incorporated herein by reference.
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7
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8 import cgi, re, os, time, urllib, textwrap
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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 = [("second", 1),
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18 ("minute", 60),
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19 ("hour", 3600),
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20 ("day", 3600 * 24),
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21 ("week", 3600 * 24 * 7),
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22 ("month", 3600 * 24 * 30),
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23 ("year", 3600 * 24 * 365)]
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24
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25 agescales.reverse()
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26
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27 def age(date):
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28 '''turn a (timestamp, tzoff) tuple into an age string.'''
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29
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30 def plural(t, c):
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31 if c == 1:
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32 return t
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33 return t + "s"
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34 def fmt(t, c):
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35 return "%d %s" % (c, plural(t, c))
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36
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37 now = time.time()
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38 then = date[0]
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39 if then > now:
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40 return 'in the future'
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41
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42 delta = max(1, int(now - then))
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43 for t, s in agescales:
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44 n = delta / s
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45 if n >= 2 or s == 1:
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46 return fmt(t, n)
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47
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48 para_re = None
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49 space_re = None
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50
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51 def fill(text, width):
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52 '''fill many paragraphs.'''
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53 global para_re, space_re
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54 if para_re is None:
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55 para_re = re.compile('(\n\n|\n\\s*[-*]\\s*)', re.M)
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56 space_re = re.compile(r' +')
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57
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58 def findparas():
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59 start = 0
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60 while True:
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61 m = para_re.search(text, start)
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62 if not m:
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63 w = len(text)
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64 while w > start and text[w-1].isspace(): w -= 1
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65 yield text[start:w], text[w:]
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66 break
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67 yield text[start:m.start(0)], m.group(1)
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68 start = m.end(1)
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69
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70 return "".join([space_re.sub(' ', textwrap.fill(para, width)) + rest
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71 for para, rest in findparas()])
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72
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73 def firstline(text):
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74 '''return the first line of text'''
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75 try:
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76 return text.splitlines(1)[0].rstrip('\r\n')
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77 except IndexError:
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78 return ''
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79
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80 def nl2br(text):
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81 '''replace raw newlines with xhtml line breaks.'''
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82 return text.replace('\n', '<br/>\n')
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83
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84 def obfuscate(text):
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85 text = unicode(text, encoding.encoding, 'replace')
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86 return ''.join(['&#%d;' % ord(c) for c in text])
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87
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88 def domain(author):
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89 '''get domain of author, or empty string if none.'''
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90 f = author.find('@')
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91 if f == -1: return ''
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92 author = author[f+1:]
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93 f = author.find('>')
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94 if f >= 0: author = author[:f]
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95 return author
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96
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97 def person(author):
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98 '''get name of author, or else username.'''
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99 if not '@' in author: return author
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100 f = author.find('<')
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101 if f == -1: return util.shortuser(author)
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102 return author[:f].rstrip()
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103
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104 def indent(text, prefix):
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105 '''indent each non-empty line of text after first with prefix.'''
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106 lines = text.splitlines()
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107 num_lines = len(lines)
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108 def indenter():
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109 for i in xrange(num_lines):
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110 l = lines[i]
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111 if i and l.strip():
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112 yield prefix
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113 yield l
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114 if i < num_lines - 1 or text.endswith('\n'):
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115 yield '\n'
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116 return "".join(indenter())
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117
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118 def permissions(flags):
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119 if "l" in flags:
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120 return "lrwxrwxrwx"
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121 if "x" in flags:
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122 return "-rwxr-xr-x"
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123 return "-rw-r--r--"
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124
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125 def xmlescape(text):
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126 text = (text
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127 .replace('&', '&')
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128 .replace('<', '<')
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129 .replace('>', '>')
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130 .replace('"', '"')
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131 .replace("'", ''')) # ' invalid in HTML
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132 return re.sub('[\x00-\x08\x0B\x0C\x0E-\x1F]', ' ', text)
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133
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134 _escapes = [
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135 ('\\', '\\\\'), ('"', '\\"'), ('\t', '\\t'), ('\n', '\\n'),
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136 ('\r', '\\r'), ('\f', '\\f'), ('\b', '\\b'),
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137 ]
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138
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139 def jsonescape(s):
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140 for k, v in _escapes:
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141 s = s.replace(k, v)
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142 return s
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143
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144 def json(obj):
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145 if obj is None or obj is False or obj is True:
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146 return {None: 'null', False: 'false', True: 'true'}[obj]
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147 elif isinstance(obj, int) or isinstance(obj, float):
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148 return str(obj)
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149 elif isinstance(obj, str):
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150 return '"%s"' % jsonescape(obj)
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151 elif isinstance(obj, unicode):
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152 return json(obj.encode('utf-8'))
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153 elif hasattr(obj, 'keys'):
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154 out = []
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155 for k, v in obj.iteritems():
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156 s = '%s: %s' % (json(k), json(v))
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157 out.append(s)
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158 return '{' + ', '.join(out) + '}'
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159 elif hasattr(obj, '__iter__'):
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160 out = []
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161 for i in obj:
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162 out.append(json(i))
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163 return '[' + ', '.join(out) + ']'
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164 else:
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165 raise TypeError('cannot encode type %s' % obj.__class__.__name__)
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166
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167 def stripdir(text):
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168 '''Treat the text as path and strip a directory level, if possible.'''
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169 dir = os.path.dirname(text)
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170 if dir == "":
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171 return os.path.basename(text)
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172 else:
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173 return dir
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174
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175 def nonempty(str):
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176 return str or "(none)"
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177
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178 filters = {
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179 "addbreaks": nl2br,
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180 "basename": os.path.basename,
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181 "stripdir": stripdir,
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182 "age": age,
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183 "date": lambda x: util.datestr(x),
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184 "domain": domain,
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185 "email": util.email,
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186 "escape": lambda x: cgi.escape(x, True),
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187 "fill68": lambda x: fill(x, width=68),
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188 "fill76": lambda x: fill(x, width=76),
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189 "firstline": firstline,
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190 "tabindent": lambda x: indent(x, '\t'),
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191 "hgdate": lambda x: "%d %d" % x,
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192 "isodate": lambda x: util.datestr(x, '%Y-%m-%d %H:%M %1%2'),
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193 "isodatesec": lambda x: util.datestr(x, '%Y-%m-%d %H:%M:%S %1%2'),
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194 "json": json,
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195 "jsonescape": jsonescape,
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196 "localdate": lambda x: (x[0], util.makedate()[1]),
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197 "nonempty": nonempty,
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198 "obfuscate": obfuscate,
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199 "permissions": permissions,
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200 "person": person,
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201 "rfc822date": lambda x: util.datestr(x, "%a, %d %b %Y %H:%M:%S %1%2"),
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202 "rfc3339date": lambda x: util.datestr(x, "%Y-%m-%dT%H:%M:%S%1:%2"),
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203 "short": lambda x: x[:12],
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204 "shortdate": util.shortdate,
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205 "stringify": stringify,
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206 "strip": lambda x: x.strip(),
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207 "urlescape": lambda x: urllib.quote(x),
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208 "user": lambda x: util.shortuser(x),
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209 "stringescape": lambda x: x.encode('string_escape'),
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210 "xmlescape": xmlescape,
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211 }
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