Mercurial > libervia-web

annotate libervia/pages/_browser/template.py @ 1346:cda5537c71d6

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browser (photos/album): videos integrations: videos can now be added to an album, the alternative media player is then used to display them. Slides options are used to remove pagination and slidebar from slideshow (they don't play well with media player), and video are reset when its slide is exited.
author Goffi <goffi@goffi.org>
date Tue, 25 Aug 2020 08:31:56 +0200
parents 3411ec23c389
children 106bae41f5c8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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
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7
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8 safe = nunjucks.runtime.SafeString.new
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9 env = nunjucks.configure(
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10 window.templates_root_url,
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11 {
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12 'autoescape': True,
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13 'trimBlocks': True,
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14 'lstripBlocks': True,
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15 'web': {'useCache': True},
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16 })
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17
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18 nunjucks.installJinjaCompat()
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19 env.addGlobal("profile", window.profile)
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20 env.addGlobal("csrf_token", window.csrf_token)
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21 # FIXME: integrate gettext or equivalent here
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22 env.addGlobal("_", lambda txt: txt)
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23
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24
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25 class Indexer:
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26 """Index global to a page"""
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27
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28 def __init__(self):
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29 self._indexes = {}
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30
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31 def next(self, value):
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32 if value not in self._indexes:
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33 self._indexes[value] = 0
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34 return 0
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35 self._indexes[value] += 1
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36 return self._indexes[value]
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37
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38 def current(self, value):
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39 return self._indexes.get(value)
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40
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41
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42 gidx = Indexer()
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43 # suffix use to avoid collision with IDs generated in static page
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44 SCRIPT_SUFF = "__script__"
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45
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46 def escape_html(txt):
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47 return (
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48 txt
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49 .replace('&', '&amp;')
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50 .replace('<', '&lt;')
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51 .replace('>', '&gt;')
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52 .replace('"', '&quot;')
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53 )
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54
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55
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56 def get_args(n_args, *sig_args, **sig_kwargs):
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57 """Retrieve function args when they are transmitted using nunjucks convention
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58
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59 cf. https://mozilla.github.io/nunjucks/templating.html#keyword-arguments
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60 @param n_args: argument from nunjucks call
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61 @param sig_args: expected positional arguments
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62 @param sig_kwargs: expected keyword arguments
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63 @return: all expected arguments, with default value if not specified in nunjucks
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64 """
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65 # nunjucks set kwargs in last argument
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66 given_args = list(n_args)
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67 try:
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68 given_kwargs = given_args.pop().to_dict()
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69 except (AttributeError, IndexError):
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70 # we don't have a dict as last argument
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71 # that happens when there is no keyword argument
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72 given_args = list(n_args)
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73 given_kwargs = {}
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74 ret = given_args[:len(sig_args)]
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75 # we check if we have remaining positional arguments
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76 # in which case they may be specified in keyword arguments
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77 for name in sig_args[len(given_args):]:
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78 try:
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79 value = given_kwargs.pop(name)
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80 except KeyError:
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81 raise ValueError(f"missing positional arguments {name!r}")
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82 ret.append(value)
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83
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84 extra_pos_args = given_args[len(sig_args):]
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85 # and now the keyword arguments
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86 for name, default in sig_kwargs.items():
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87 if extra_pos_args:
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88 # kw args has been specified with a positional argument
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89 ret.append(extra_pos_args.pop(0))
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90 continue
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91 value = given_kwargs.get(name, default)
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92 ret.append(value)
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93
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94 return ret
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95
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96
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97 def _next_gidx(value):
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98 """Use next current global index as suffix"""
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99 next_ = gidx.next(value)
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100 return f"{value}{SCRIPT_SUFF}" if next_ == 0 else f"{value}_{SCRIPT_SUFF}{next_}"
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101
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102 env.addFilter("next_gidx", _next_gidx)
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103
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104
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105 def _cur_gidx(value):
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106 """Use current current global index as suffix"""
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107 current = gidx.current(value)
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108 return f"{value}{SCRIPT_SUFF}" if not current else f"{value}_{SCRIPT_SUFF}{current}"
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109
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110 env.addFilter("cur_gidx", _cur_gidx)
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111
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112
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113 def _xmlattr(d, autospace=True):
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114 if not d:
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115 return
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116 d = d.to_dict()
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117 ret = [''] if autospace else []
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118 for key, value in d.items():
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119 if value is not None:
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120 ret.append(f'{escape_html(key)}="{escape_html(str(value))}"')
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121
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122 return safe(' '.join(ret))
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123
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124 env.addFilter("xmlattr", _xmlattr)
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125
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126
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127 def _tojson(value):
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128 return safe(escape_html(window.JSON.stringify(value)))
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129
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130 env.addFilter("tojson", _tojson)
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131
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132
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133 def _icon_use(name, cls=""):
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134 kwargs = cls.to_dict()
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135 cls = kwargs.get('cls')
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136 return safe(
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137 '<svg class="svg-icon{cls}" xmlns="http://www.w3.org/2000/svg" '
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138 'viewBox="0 0 100 100">\n'
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139 ' <use href="#{name}"/>'
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140 '</svg>\n'.format(name=name, cls=(" " + cls) if cls else "")
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141 )
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142
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143 env.addGlobal("icon", _icon_use)
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144
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145
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146 def _date_fmt(
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147 timestamp, *args
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148 ):
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149 """Date formatting
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150
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151 cf. sat.tools.common.date_utils for arguments details
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152 """
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153 fmt, date_only, auto_limit, auto_old_fmt, auto_new_fmt = get_args(
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154 args, fmt="short", date_only=False, auto_limit=7, auto_old_fmt="short",
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155 auto_new_fmt="relative",
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156 )
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157 from js_modules.moment import moment
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158 date = moment.unix(timestamp)
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159
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160 if fmt == "auto_day":
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161 fmt, auto_limit, auto_old_fmt, auto_new_fmt = "auto", 0, "short", "HH:mm"
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162 if fmt == "auto":
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163 limit = moment().startOf('day').subtract(auto_limit, 'days')
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164 m_fmt = auto_old_fmt if date < limit else auto_new_fmt
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165
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166 if fmt == "short":
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167 m_fmt = "DD/MM/YY" if date_only else "DD/MM/YY HH:mm"
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168 elif fmt == "medium":
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169 m_fmt = "ll" if date_only else "lll"
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170 elif fmt == "long":
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171 m_fmt = "LL" if date_only else "LLL"
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172 elif fmt == "full":
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173 m_fmt = "dddd, LL" if date_only else "LLLL"
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174 elif fmt == "relative":
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175 return date.fromNow()
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176 elif fmt == "iso":
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177 if date_only:
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178 m_fmt == "YYYY-MM-DD"
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179 else:
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180 return date.toISOString()
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181 else:
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182 raise NotImplementedError("free format is not implemented yet")
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183
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184 return date.format(m_fmt)
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185
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186 env.addFilter("date_fmt", _date_fmt)
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187
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188
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189 class I18nExtension:
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190 """Extension to handle the {% trans %}{% endtrans %} statement"""
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191 # FIXME: for now there is no translation, this extension only returns the string
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192 # unmodified
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193 tags = ['trans']
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194
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195 def parse(self, parser, nodes, lexer):
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196 tok = parser.nextToken()
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197 args = parser.parseSignature(None, True)
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198 parser.advanceAfterBlockEnd(tok.value)
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199 body = parser.parseUntilBlocks('endtrans')
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200 parser.advanceAfterBlockEnd()
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201 return nodes.CallExtension.new(self._js_ext, 'run', args, [body])
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202
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203 def run(self, context, *args):
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204 body = args[-1]
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205 return body()
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206
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207 @classmethod
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208 def install(cls, env):
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209 ext = cls()
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210 ext_dict = {
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211 "tags": ext.tags,
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212 "parse": ext.parse,
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213 "run": ext.run
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214 }
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215 ext._js_ext = javascript.pyobj2jsobj(ext_dict)
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216 env.addExtension(cls.__name__, ext._js_ext)
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217
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218 I18nExtension.install(env)
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219
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220
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221 class Template:
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222
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223 def __init__(self, tpl_name):
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224 self._tpl = env.getTemplate(tpl_name, True)
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225
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226 def render(self, context):
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227 return self._tpl.render(context)
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228
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229 def get_elt(self, context=None):
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230 if context is None:
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231 context = {}
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232 raw_html = self.render(context)
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233 template_elt = document.createElement('template')
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234 template_elt.innerHTML = raw_html
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235 return template_elt.content.firstElementChild