really spaceless (trim spaces at line start)

Author:: wolfram
Posted:: January 16, 2008
Language:: Python
Version:: .96
Score:: 2 (after 2 ratings)

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This tag is meant to override the current implementation of '{% spaceless %}' tag and remove spaces at the beginning of a line too. I.e. a template like this:

<div>
    <div>useless space up front</div>
</div>

will become this

<div>

<div>useless space up front</div>

</div>

All the other behaviour of spaceless stays the same!

Put this in your app/name/templatetags/tags.py And if you want it to override the default "spaceless"-tag to the following

from django.template import add_to_builtins
add_to_builtins('app.name.templatetags.tags')

class SpacelessNode(template.Node):
    def __init__(self, nodelist):
        self.nodelist = nodelist

    def render(self, context):
        return strip_spaces_between_tags(self.nodelist.render(context).strip())

@register.tag
def spaceless(parser, token):
    """like spaceless, just removes the spaces at the beginning of a line too"""
    nodelist = parser.parse(('endspaceless',))
    parser.delete_first_token()
    return SpacelessNode(nodelist)

def strip_spaces_between_tags(value):
    "Return the given HTML with spaces between tags removed."
    value = re.sub(r'\n\s+', '\n', force_unicode(value)) # Replace all leading spaces at the beginning of a line!
    return re.sub(r'>\s+<', '><', force_unicode(value))
strip_spaces_between_tags = allow_lazy(strip_spaces_between_tags, unicode)

Comments

bartTC (on January 16, 2008):

Note that this will erase all leading spaces in pre-Tags too.

gregb (on September 3, 2009):

You need to add in some import statements at the top there...

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really spaceless (trim spaces at line start)

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