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# Borrowed from http://djangosnippets.org/snippets/2199/
#
# Digg-like page numbering using inclusion tag
from django import template
register = template.Library()
@register.inclusion_tag('pagination.html', takes_context=True)
def pagination(context, page, begin_pages=2, end_pages=2, before_current_pages=4, after_current_pages=4):
# Digg-like pages
before = max(page.number - before_current_pages - 1, 0)
after = page.number + after_current_pages
begin = page.paginator.page_range[:begin_pages]
middle = page.paginator.page_range[before:after]
end = page.paginator.page_range[-end_pages:]
last_page_number = end[-1]
def collides(firstlist, secondlist):
""" Returns true if lists collides (have same entries)
>>> collides([1,2,3,4],[3,4,5,6,7])
True
>>> collides([1,2,3,4],[5,6,7])
False
"""
return any(item in secondlist for item in firstlist)
# If middle and end has same entries, then end is what we want
if collides(middle, end):
end = range(max(page.number-before_current_pages, 1), last_page_number+1)
middle = []
# If begin and middle ranges has same entries, then begin is what we want
if collides(begin, middle):
begin = range(1, min(page.number + after_current_pages, last_page_number)+1)
middle = []
# If begin and end has same entries then begin is what we want
if collides(begin, end):
begin = range(1, last_page_number+1)
end = []
context.update({'page' : page,
'begin' : begin,
'middle' : middle,
'end' : end})
return context
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