Django snippets

from django import template

register = template.Library()

def paginator(context, adjacent=4):
    """
    To be used in conjunction with the object_list generic view.

    Adds pagination context variables for use in displaying first, adjacent and
    last page links in addition to those created by the object_list generic
    view.
    """
   
    s = max(1, context["page"] - adjacent - max(0, context["page"]+adjacent-context["pages"]))
    page_numbers = range(s, min(context["pages"], s+2*adjacent)+1)
    
    ret_dict =\
        {
          "page_numbers": page_numbers,
          "show_first": 1 not in page_numbers,
          "show_last": context["pages"] not in page_numbers,
        }

    keys = ("hits", "results_per_page", "page", "pages", "next", "previous", "has_next", "has_previous")
    for k in keys:
        ret_dict.update({k: context[k]})
    return ret_dict
    
register.inclusion_tag("paginator.html", takes_context=True)(paginator)