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# Patchwork - automated patch tracking system
# Copyright (C) 2008 Jeremy Kerr <jk@ozlabs.org>
#
# SPDX-License-Identifier: GPL-2.0-or-later
from django.conf import settings
from django.core import paginator
DEFAULT_ITEMS_PER_PAGE = 100
LONG_PAGE_THRESHOLD = 30
LEADING_PAGE_RANGE_DISPLAYED = 4
TRAILING_PAGE_RANGE_DISPLAYED = 4
LEADING_PAGE_RANGE = 4
TRAILING_PAGE_RANGE = 2
NUM_PAGES_OUTSIDE_RANGE = 2
ADJACENT_PAGES = 1
# parts from:
# http://blog.localkinegrinds.com/2007/09/06/digg-style-pagination-in-django/
class Paginator(paginator.Paginator):
def __init__(self, request, objects):
items_per_page = settings.DEFAULT_ITEMS_PER_PAGE
if request.user.is_authenticated:
items_per_page = request.user.profile.items_per_page
super(Paginator, self).__init__(objects, items_per_page)
try:
page_no = int(request.GET.get('page', 1))
self.current_page = self.page(int(page_no))
except ValueError:
page_no = 1
self.current_page = self.page(page_no)
except paginator.EmptyPage:
if page_no < 1:
page_no = 1
else:
page_no = self.num_pages
self.current_page = self.page(page_no)
self.leading_set = self.trailing_set = []
pages = self.num_pages
if pages <= LEADING_PAGE_RANGE_DISPLAYED:
adjacent_start = 1
adjacent_end = pages + 1
elif page_no < LEADING_PAGE_RANGE:
adjacent_start = 1
adjacent_end = LEADING_PAGE_RANGE_DISPLAYED + 1
self.leading_set = [n + pages for n in
range(0, -NUM_PAGES_OUTSIDE_RANGE, -1)]
elif page_no >= pages - TRAILING_PAGE_RANGE:
adjacent_start = pages - TRAILING_PAGE_RANGE_DISPLAYED + 1
adjacent_end = pages + 1
self.trailing_set = [n + 1 for n in
range(0, NUM_PAGES_OUTSIDE_RANGE)]
else:
adjacent_start = page_no - ADJACENT_PAGES
adjacent_end = page_no + ADJACENT_PAGES + 1
self.leading_set = [n + pages for n in
range(0, -NUM_PAGES_OUTSIDE_RANGE, -1)]
self.trailing_set = [n + 1 for n in
range(0, NUM_PAGES_OUTSIDE_RANGE)]
self.adjacent_set = [n for n in range(adjacent_start, adjacent_end)
if n > 0 and n <= pages]
self.leading_set.reverse()
self.long_page = len(
self.current_page.object_list) >= LONG_PAGE_THRESHOLD
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