Django Paginator override for smart page_range or digg-style pagination.

paginator.py

from django.core.paginator import Paginator, Page

class SmartPaginator(Paginator):
    def __init__(self, object_list, per_page, range_count=3, 
                    orphans=0, allow_empty_first_page=True):
        self.range_count = range_count
        super(SmartPaginator, self).__init__(object_list, per_page, orphans=orphans, 
                                            allow_empty_first_page=allow_empty_first_page)

    def page(self, number):
        self.current_page = self.validate_number(number)
        return super(SmartPaginator, self).page(number)

    def _get_page_range(self):
        """
        Returns a smart range of pages for iterating through within
        a template for loop.
        """

        start = self.current_page - self.range_count
        start_offset = 0
        if start < 1:
            start_offset = start
            start = 1

        end = self.current_page + self.range_count
        end_offset = 0
        if end > self.num_pages:
            end_offset = end - self.num_pages
            end = self.num_pages

        if start_offset < 0:
            end -= start_offset - 1

        if end_offset > 0:
            start -= end_offset

        end += 1

        return range(start, end)
    page_range = property(_get_page_range)