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annotate roundup/cgi/engine_jinja2.py @ 5402:88dbacd11cd1

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Python 3 preparation: update urllib / urllib2 / urlparse imports. The existing roundup/anypy/urllib_.py is extended to cover more imports and used in more places. Manual patch.
author Joseph Myers <jsm@polyomino.org.uk>
date Tue, 24 Jul 2018 23:48:30 +0000
parents 64b05e24dbd8
children 56c9bcdea47f
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1 """
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2 Experimental Jinja2 support for Roundup. It will become less
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3 experimental when it is completely clear what information is
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4 passed to template, and when the info is limited to the sane
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5 minimal set (to avoid Roundup state changes from template).
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6
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7 [ ] fallback mechanizm to use multiple templating engines in
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8 parallel and aid in incremental translation from one
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9 engine to another
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10
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11 [ ] define a place for templates
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12 probably
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13 TRACKER_HOME/templates/jinja2
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14 with
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15 TRACKER_HOME/templates/INFO.txt
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16 describing how the dir was created, for example
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17 "This is a copy of 'classic' template from ..."
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18 also template fallback mechanizm for multi-engine
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19 configuration
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20 [ ] backward compatibility - if no engine is explicitly
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21 specified, use TRACKER_HOME/html directory
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22 [ ] copy TEMPLATES-INFO.txt to INFO.txt
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23 [ ] implement VERSION file in environment for auto
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24 upgrade
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25 [ ] figure out what to do with autoescaping - it is disabled
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26 by default in Jinja2
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27
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28 [ ] precompile() is a stub
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29
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30 [ ] add {{ debug() }} dumper to inspect available variables
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31 https://github.com/mitsuhiko/jinja2/issues/174
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32 """
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33
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34 from __future__ import print_function
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35 import jinja2
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36 import gettext
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38 from types import MethodType
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39
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40 # http://jinja.pocoo.org/docs/api/#loaders
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42 from roundup.cgi.templating import context, LoaderBase, TemplateBase
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44 class Jinja2Loader(LoaderBase):
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45 def __init__(self, dir):
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46 extensions = [
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47 'jinja2.ext.autoescape',
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48 ]
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49 print("Jinja2 templates: ", dir)
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50 print("Extensions: ", extensions)
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51 self._env = jinja2.Environment(
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52 loader=jinja2.FileSystemLoader(dir),
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53 extensions=extensions
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54 )
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55
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56 # Adding a custom filter that can transform roundup's vars to unicode
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57 # This is necessary because jinja2 can only deal with unicode objects
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58 # and roundup uses utf-8 for the internal representation.
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59 # The automatic conversion will assume 'ascii' and fail sometime.
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60 # Analysed with roundup 1.5.0 and jinja 2.7.1. See issue2550811.
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61 self._env.filters["u"] = lambda s: \
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62 unicode(s(), "utf-8") if type(s) == MethodType \
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63 else unicode(s, "utf-8")
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64
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65 def check(self, tplname):
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66 #print tplname
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67 try:
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68 #print self._env.get_template(tplname + '.html')
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69 self._env.get_template(tplname + '.html')
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70 except jinja2.TemplateNotFound:
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71 return
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72 else:
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73 return True
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74
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75 def load(self, tplname):
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76 #src, filename = self.check(tplname)
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77 return Jinja2ProxyPageTemplate(self._env.get_template(tplname + '.html'))
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78
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79 def precompile(self):
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80 pass
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81
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82 class Jinja2ProxyPageTemplate(TemplateBase):
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83 def __init__(self, template):
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84 self._tpl = template
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85
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86 def render(self, client, classname, request, **options):
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87 # [ ] limit the information passed to the minimal necessary set
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88 c = context(client, self, classname, request)
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89 c.update({'options': options})
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90 return self._tpl.render(c).encode(client.charset, )
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91
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92 def __getitem__(self, name):
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93 # [ ] figure out what are these for
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94 raise NotImplemented
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95 #return self._pt[name]
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96
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97 def __getattr__(self, name):
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98 # [ ] figure out what are these for
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99 raise NotImplemented
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100 #return getattr(self._pt, name)
Roundup Issue Tracker: http://roundup-tracker.org/