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annotate roundup/cgi/engine_jinja2.py @ 4750:12b029655c05

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Templating proof of concept to use multiple engines simultaneously, set "template_engine = jinja2, zopetal" to play.
author anatoly techtonik <techtonik@gmail.com>
date Tue, 22 Jan 2013 17:47:29 +0300
parents e339583eae8e
children a8c95abaf3fb
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2d6959f1d2df templating: proof of concept for Jinja2 support. Select 'jinja2'
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1 """
2d6959f1d2df templating: proof of concept for Jinja2 support. Select 'jinja2'
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2 Experimental Jinja2 support for Roundup. It will become less
2d6959f1d2df templating: proof of concept for Jinja2 support. Select 'jinja2'
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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 import jinja2
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35
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36 # http://jinja.pocoo.org/docs/api/#loaders
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37
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38 from roundup.cgi.templating import context, LoaderBase, TemplateBase
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39
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40 class Jinja2Loader(LoaderBase):
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41 def __init__(self, dir):
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42 jinjadir = dir + '/jinja2'
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43 # [ ] separate configuration when multiple loaders are used
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44 print "Jinja2 templates:", jinjadir
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45 self._env = jinja2.Environment(
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46 loader=jinja2.FileSystemLoader(jinjadir)
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47 )
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48
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49 def check(self, tplname):
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12b029655c05 Templating proof of concept to use multiple engines simultaneously,
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50 #print tplname
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51 try:
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52 #print self._env.get_template(tplname + '.html')
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53 self._env.get_template(tplname + '.html')
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54 except jinja2.TemplateNotFound:
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55 return
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56 else:
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57 return True
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58
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59 def load(self, tplname):
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60 #src, filename = self.check(tplname)
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61 return Jinja2ProxyPageTemplate(self._env.get_template(tplname + '.html'))
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62
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63 def precompile(self):
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64 pass
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65
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66 class Jinja2ProxyPageTemplate(TemplateBase):
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67 def __init__(self, template):
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68 self._tpl = template
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69
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70 def render(self, client, classname, request, **options):
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71 # [ ] limit the information passed to the minimal necessary set
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72 c = context(client, self, classname, request)
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73 '''c.update({'options': options})
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74
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75 def translate(msgid, domain=None, mapping=None, default=None):
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76 result = client.translator.translate(domain, msgid,
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77 mapping=mapping, default=default)
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78 return unicode(result, client.translator.OUTPUT_ENCODING)
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79
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80 output = self._pt.render(None, translate, **c)
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81 return output.encode(client.charset)
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82 '''
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83 return self._tpl.render(c)
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84
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85 def __getitem__(self, name):
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86 # [ ] figure out what are these for
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87 raise NotImplemented
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88 #return self._pt[name]
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89
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90 def __getattr__(self, name):
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91 # [ ] figure out what are these for
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92 raise NotImplemented
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93 #return getattr(self._pt, name)
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94
Roundup Issue Tracker: http://roundup-tracker.org/