philo/templatetags/include_string.py

   1 """
   2 .. templatetag:: include_string
   3
   4 include_string
   5 --------------
   6
   7 Include a flat string by interpreting it as a template. The compiled template will be rendered with the current context.
   8
   9 Usage::
  10
  11         {% include_string <template_code> %}
  12
  13 """
  14
  15 from django import template
  16 from django.conf import settings
  17
  18
  19 register = template.Library()
  20
  21
  22 class IncludeStringNode(template.Node):
  23         def __init__(self, string):
  24                 self.string = string
  25
  26         def render(self, context):
  27                 try:
  28                         t = template.Template(self.string.resolve(context))
  29                         return t.render(context)
  30                 except template.TemplateSyntaxError:
  31                         if settings.TEMPLATE_DEBUG:
  32                                 raise
  33                         return settings.TEMPLATE_STRING_IF_INVALID
  34                 except:
  35                         return settings.TEMPLATE_STRING_IF_INVALID
  36
  37
  38 def do_include_string(parser, token):
  39         bits = token.split_contents()
  40         if len(bits) != 2:
  41                 raise TemplateSyntaxError("%r tag takes one argument: the template string to be included" % bits[0])
  42         string = parser.compile_filter(bits[1])
  43         return IncludeStringNode(string)
  44
  45
  46 register.tag('include_string', do_include_string)