Mercurial > libervia-web

annotate libervia/web/pages/_browser/template.py @ 1604:4a9679369856

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browser (call): implements group calls: rel 430
author Goffi <goffi@goffi.org>
date Wed, 15 May 2024 17:40:33 +0200
parents 9865013da86c
children
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1 """Integrate templating system using nunjucks"""
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2
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3 from js_modules.nunjucks import nunjucks
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4 from browser import window, document
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5 import javascript
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6 import jid
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7
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8
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9 safe = nunjucks.runtime.SafeString.new
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10 env = nunjucks.configure(
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11 window.templates_root_url,
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12 {
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13 'autoescape': True,
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14 'trimBlocks': True,
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15 'lstripBlocks': True,
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16 'web': {'use_cache': True},
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17 })
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18
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19 nunjucks.installJinjaCompat()
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20 env.addGlobal("profile", window.profile)
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21 env.addGlobal("csrf_token", window.csrf_token)
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22 # FIXME: integrate gettext or equivalent here
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23 env.addGlobal("_", lambda txt: txt)
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24
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25
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26 class Indexer:
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27 """Index global to a page"""
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28
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29 def __init__(self):
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30 self._indexes = {}
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31
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32 def next(self, value):
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33 if value not in self._indexes:
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34 self._indexes[value] = 0
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35 return 0
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36 self._indexes[value] += 1
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37 return self._indexes[value]
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38
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39 def current(self, value):
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40 return self._indexes.get(value)
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41
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42
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43 gidx = Indexer()
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44 # suffix used to avoid collision with IDs generated in static page
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45 SCRIPT_SUFF = "__script__"
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46
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47 def escape_html(txt):
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48 return (
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49 txt
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50 .replace('&', '&amp;')
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51 .replace('<', '&lt;')
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52 .replace('>', '&gt;')
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53 .replace('"', '&quot;')
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54 )
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55
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56
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57 def get_args(n_args, *sig_args, **sig_kwargs):
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58 """Retrieve function args when they are transmitted using nunjucks convention
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59
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60 cf. https://mozilla.github.io/nunjucks/templating.html#keyword-arguments
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61 @param n_args: argument from nunjucks call
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62 @param sig_args: expected positional arguments
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63 @param sig_kwargs: expected keyword arguments
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64 @return: all expected arguments, with default value if not specified in nunjucks
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65 """
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66 # nunjucks set kwargs in last argument
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67 given_args = list(n_args)
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68 try:
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69 given_kwargs = given_args.pop().to_dict()
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70 except (AttributeError, IndexError):
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71 # we don't have a dict as last argument
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72 # that happens when there is no keyword argument
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73 given_args = list(n_args)
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74 given_kwargs = {}
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75 ret = given_args[:len(sig_args)]
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76 # we check if we have remaining positional arguments
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77 # in which case they may be specified in keyword arguments
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78 for name in sig_args[len(given_args):]:
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79 try:
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80 value = given_kwargs.pop(name)
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81 except KeyError:
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82 raise ValueError(f"missing positional arguments {name!r}")
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83 ret.append(value)
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84
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85 extra_pos_args = given_args[len(sig_args):]
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86 # and now the keyword arguments
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87 for name, default in sig_kwargs.items():
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88 if extra_pos_args:
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89 # kw args has been specified with a positional argument
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90 ret.append(extra_pos_args.pop(0))
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91 continue
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92 value = given_kwargs.get(name, default)
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93 ret.append(value)
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94
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95 return ret
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96
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97
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98 def _bare_jid(full_jid: str|jid.JID) -> str:
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99 """Return the bare JID"""
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100 return str(jid.JID(str(full_jid)).bare)
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101
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102 env.addFilter("bare_jid", _bare_jid)
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103
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104
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105 def _next_gidx(value):
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106 """Use next current global index as suffix"""
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107 next_ = gidx.next(value)
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108 return f"{value}{SCRIPT_SUFF}" if next_ == 0 else f"{value}_{SCRIPT_SUFF}{next_}"
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109
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110 env.addFilter("next_gidx", _next_gidx)
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111
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112
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113 def _cur_gidx(value):
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114 """Use current current global index as suffix"""
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115 current = gidx.current(value)
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116 return f"{value}{SCRIPT_SUFF}" if not current else f"{value}_{SCRIPT_SUFF}{current}"
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117
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118 env.addFilter("cur_gidx", _cur_gidx)
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119
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120
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121 def _xmlattr(d, autospace=True):
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122 if not d:
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123 return
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124 d = d.to_dict()
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125 ret = [''] if autospace else []
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126 for key, value in d.items():
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127 if value is not None:
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128 ret.append(f'{escape_html(key)}="{escape_html(str(value))}"')
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129
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130 return safe(' '.join(ret))
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131
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132 env.addFilter("xmlattr", _xmlattr)
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133
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134
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135 def _tojson(value):
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136 return safe(escape_html(window.JSON.stringify(value)))
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137
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138 env.addFilter("tojson", _tojson)
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139
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140
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141 def _media_type_main(value: str|None) -> str|None:
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142 """Return main type of a media type"""
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143 if not value:
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144 return None
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145 return value.partition("/")[0]
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146
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147 env.addFilter("media_type_main", _media_type_main)
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148
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149
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150 def _media_type_sub(value: str|None) -> str|None:
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151 """Return main type of a media type"""
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152 if not value:
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153 return None
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154 return value.partition("/")[1]
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155
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156 env.addFilter("media_type_sub", _media_type_sub)
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157
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158
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159 def _icon_use(name, cls=""):
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160 if cls:
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161 kwargs = cls.to_dict()
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162 cls = kwargs.get('cls')
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163 return safe(
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164 '<svg class="svg-icon{cls}" xmlns="http://www.w3.org/2000/svg" '
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165 'viewBox="0 0 100 100">\n'
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166 ' <use href="#{name}"/>'
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167 '</svg>\n'.format(name=name, cls=(" " + cls) if cls else "")
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168 )
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169
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170 env.addGlobal("icon", _icon_use)
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171
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172
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173 def _date_fmt(timestamp, *args):
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174 """Date formatting
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175
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176 cf. libervia.backend.tools.common.date_utils for arguments details
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177 """
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178 fmt, date_only, auto_limit, auto_old_fmt, auto_new_fmt = get_args(
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179 args, fmt="short", date_only=False, auto_limit=7, auto_old_fmt="short",
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180 auto_new_fmt="relative",
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181 )
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182 from js_modules.moment import moment
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183 date = moment.unix(timestamp)
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184
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185 if fmt == "auto_day":
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186 fmt, auto_limit, auto_old_fmt, auto_new_fmt = "auto", 0, "short", "HH:mm"
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187
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188 if fmt == "auto":
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189 limit = moment().startOf('day').subtract(auto_limit, 'days')
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190 fmt = auto_old_fmt if date < limit else auto_new_fmt
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191
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192 format_mapping = {
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193 "short": "DD/MM/YY" if date_only else "DD/MM/YY HH:mm",
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194 "medium": "DD MMM YYYY" if date_only else "DD MMM YYYY HH:mm",
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195 "long": "D MMMM YYYY" if date_only else "D MMMM YYYY HH:mm",
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196 "full": "dddd, D MMMM YYYY" if date_only else "dddd, D MMMM YYYY HH:mm",
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197 "relative": date.fromNow(),
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198 "iso": date.toISOString() if not date_only else "YYYY-MM-DD"
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199 }
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200
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201 # if `fmt` doesn't match any mapping, it's a free format
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202 m_fmt = format_mapping.get(fmt, fmt)
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203
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204 return m_fmt if fmt in ["relative", "iso"] else date.format(m_fmt)
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205
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206 env.addFilter("date_fmt", _date_fmt)
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207
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208
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209 class I18nExtension:
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210 """Extension to handle the {% trans %}{% endtrans %} statement"""
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211 # FIXME: for now there is no translation, this extension only returns the string
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212 # unmodified
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213 tags = ['trans']
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214
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215 def parse(self, parser, nodes, lexer):
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216 tok = parser.nextToken()
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217 args = parser.parseSignature(None, True)
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218 parser.advanceAfterBlockEnd(tok.value)
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219 body = parser.parseUntilBlocks('endtrans')
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220 parser.advanceAfterBlockEnd()
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221 return nodes.CallExtension.new(self._js_ext, 'run', args, [body])
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222
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223 def run(self, context, *args):
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224 body = args[-1]
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225 return body()
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226
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227 @classmethod
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228 def install(cls, env):
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229 ext = cls()
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230 ext_dict = {
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231 "tags": ext.tags,
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232 "parse": ext.parse,
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233 "run": ext.run
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234 }
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235 ext._js_ext = javascript.pyobj2jsobj(ext_dict)
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236 env.addExtension(cls.__name__, ext._js_ext)
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237
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238 I18nExtension.install(env)
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239
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240
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241 class Template:
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242
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243 def __init__(self, tpl_name):
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244 self._tpl = env.getTemplate(tpl_name, True)
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245
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246 def render(self, context):
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247 return self._tpl.render(context)
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248
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249 def get_elt(self, context=None):
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250 if context is None:
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251 context = {}
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252 raw_html = self.render(context)
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253 template_elt = document.createElement('template')
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254 template_elt.innerHTML = raw_html
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255 return template_elt.content.firstElementChild