Re: Template tag and combining variables & text
Emanuele Pucciarelli napsal(a):
>
> Il giorno 29/lug/07, alle ore 22:48, Tomas Kopecek ha scritto:
>
>> I know, it's syntactical nonsense. But does anybody know about some
>> way
>> how to combine variable content with string content? Is it possible?
>>
>> For example, very crude way could be something like
>>
>> {% img %} {{BASE_URL}}/path/z.gif {% endimg %}
>
> Maybe something like {% img base_url "path/z.gif" %}: let string
> content be surrounded by double quotes, and let the tag join
> everything for you.
>
> Code:
>
> from django.template import Node, TemplateSyntaxError, Library
>
> register = Library()
>
> class MixedNode(Node):
> class Variable(object):
> def __init__(self, name):
> self.name = name
> def __str__(self):
> return self.name
> def __init__(self, args):
> self.parameters = [
> [self.Variable(arg),
> arg.rstrip('"').lstrip('"')][arg[0] == arg
> [-1] == '"']
> for arg in args]
> def get_param(self, i, context):
> if isinstance(i, self.Variable):
> return context[str(i)]
> else:
> return i
> def get_string(self, context):
> return ''.join([self.get_param(param, context) for param in
> self.parameters])
>
> class ImageNode(MixedNode):
> def render(self, context):
> return '' % self.get_string(context)
>
> def do_img(parser, token):
> arglist = token.split_contents()
> if len(arglist) < 2:
> raise TemplateSyntaxError, "%r tag requires at least one
> argument"
> % token.contents.split()[0]
> return ImageNode(arglist[1:])
>
> register.tag('img', do_img)
>
> (you can then subclass MixedNode for pretty much everything...)
>
> Regards,
>
It looks like a good idea, thanks.
--
Tomas Kopecek
e-mail: permonik at mesias.brnonet.cz
ICQ: 114483784
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Re: Template tag and combining variables & text
Il giorno 29/lug/07, alle ore 22:48, Tomas Kopecek ha scritto:
> I know, it's syntactical nonsense. But does anybody know about some
> way
> how to combine variable content with string content? Is it possible?
>
> For example, very crude way could be something like
>
> {% img %} {{BASE_URL}}/path/z.gif {% endimg %}
Maybe something like {% img base_url "path/z.gif" %}: let string
content be surrounded by double quotes, and let the tag join
everything for you.
Code:
from django.template import Node, TemplateSyntaxError, Library
register = Library()
class MixedNode(Node):
class Variable(object):
def __init__(self, name):
self.name = name
def __str__(self):
return self.name
def __init__(self, args):
self.parameters = [
[self.Variable(arg),
arg.rstrip('"').lstrip('"')][arg[0] == arg
[-1] == '"']
for arg in args]
def get_param(self, i, context):
if isinstance(i, self.Variable):
return context[str(i)]
else:
return i
def get_string(self, context):
return ''.join([self.get_param(param, context) for param in
self.parameters])
class ImageNode(MixedNode):
def render(self, context):
return '' % self.get_string(context)
def do_img(parser, token):
arglist = token.split_contents()
if len(arglist) < 2:
raise TemplateSyntaxError, "%r tag requires at least one
argument"
% token.contents.split()[0]
return ImageNode(arglist[1:])
register.tag('img', do_img)
(you can then subclass MixedNode for pretty much everything...)
Regards,
--
Emanuele
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Template tag and combining variables & text
Hello,
imagine tag, that has one parameter. Typical usage will look like this:
{% img img_url %} or {% img "http://x.y/z.gif; %}
These two cases are simple to implement, the problem arises when
parameter would be a combination of variable content and string -
something like this:
{% img {{BASE_URL}}/path/z.gif %}
I know, it's syntactical nonsense. But does anybody know about some way
how to combine variable content with string content? Is it possible?
For example, very crude way could be something like
{% img %} {{BASE_URL}}/path/z.gif {% endimg %}
--
Tomas Kopecek
e-mail: permonik at mesias.brnonet.cz
ICQ: 114483784
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
"Django users" group.
To post to this group, send email to django-users@googlegroups.com
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