set
except NameError:
from sets import Set as set
+
from django import template
-from django.db.models.query import QuerySet
+from django.http import Http404
from django.core.paginator import Paginator, InvalidPage
from django.conf import settings
DEFAULT_PAGINATION = getattr(settings, 'PAGINATION_DEFAULT_PAGINATION', 20)
DEFAULT_WINDOW = getattr(settings, 'PAGINATION_DEFAULT_WINDOW', 4)
+DEFAULT_MARGIN = getattr(settings, 'PAGINATION_DEFAULT_MARGIN', DEFAULT_WINDOW)
DEFAULT_ORPHANS = getattr(settings, 'PAGINATION_DEFAULT_ORPHANS', 0)
+INVALID_PAGE_RAISES_404 = getattr(settings,
+ 'PAGINATION_INVALID_PAGE_RAISES_404', False)
def do_autopaginate(parser, token):
"""
Splits the arguments to the autopaginate tag and formats them correctly.
"""
split = token.split_contents()
+ as_index = None
+ context_var = None
+ for i, bit in enumerate(split):
+ if bit == 'as':
+ as_index = i
+ break
+ if as_index is not None:
+ try:
+ context_var = split[as_index + 1]
+ except IndexError:
+ raise template.TemplateSyntaxError("Context variable assignment " +
+ "must take the form of {%% %r object.example_set.all ... as " +
+ "context_var_name %%}" % split[0])
+ del split[as_index:as_index + 2]
if len(split) == 2:
return AutoPaginateNode(split[1])
elif len(split) == 3:
- try:
- paginate_by = int(split[2])
- except ValueError:
- raise template.TemplateSyntaxError(u'Got %s, but expected integer.' % split[2])
- return AutoPaginateNode(split[1], paginate_by=paginate_by)
+ return AutoPaginateNode(split[1], paginate_by=split[2],
+ context_var=context_var)
elif len(split) == 4:
- try:
- paginate_by = int(split[2])
- except ValueError:
- raise template.TemplateSyntaxError(u'Got %s, but expected integer.' % split[2])
try:
orphans = int(split[3])
except ValueError:
- raise template.TemplateSyntaxError(u'Got %s, but expected integer.' % split[3])
- return AutoPaginateNode(split[1], paginate_by=paginate_by, orphans=orphans)
+ raise template.TemplateSyntaxError(u'Got %s, but expected integer.'
+ % split[3])
+ return AutoPaginateNode(split[1], paginate_by=split[2], orphans=orphans,
+ context_var=context_var)
else:
- raise template.TemplateSyntaxError('%r tag takes one required argument and one optional argument' % split[0])
+ raise template.TemplateSyntaxError('%r tag takes one required ' +
+ 'argument and one optional argument' % split[0])
class AutoPaginateNode(template.Node):
"""
tag. If you choose not to use *{% paginate %}*, make sure to display the
list of available pages, or else the application may seem to be buggy.
"""
- def __init__(self, queryset_var, paginate_by=DEFAULT_PAGINATION, orphans=DEFAULT_ORPHANS):
+ def __init__(self, queryset_var, paginate_by=DEFAULT_PAGINATION,
+ orphans=DEFAULT_ORPHANS, context_var=None):
self.queryset_var = template.Variable(queryset_var)
- self.paginate_by = paginate_by
+ if isinstance(paginate_by, int):
+ self.paginate_by = paginate_by
+ else:
+ self.paginate_by = template.Variable(paginate_by)
self.orphans = orphans
+ self.context_var = context_var
def render(self, context):
key = self.queryset_var.var
value = self.queryset_var.resolve(context)
- paginator = Paginator(value, self.paginate_by, self.orphans)
+ if isinstance(self.paginate_by, int):
+ paginate_by = self.paginate_by
+ else:
+ paginate_by = self.paginate_by.resolve(context)
+ paginator = Paginator(value, paginate_by, self.orphans)
try:
page_obj = paginator.page(context['request'].page)
except InvalidPage:
+ if INVALID_PAGE_RAISES_404:
+ raise Http404('Invalid page requested. If DEBUG were set to ' +
+ 'False, an HTTP 404 page would have been shown instead.')
context[key] = []
context['invalid_page'] = True
return u''
- context[key] = page_obj.object_list
+ if self.context_var is not None:
+ context[self.context_var] = page_obj.object_list
+ else:
+ context[key] = page_obj.object_list
context['paginator'] = paginator
context['page_obj'] = page_obj
return u''
-def paginate(context, window=DEFAULT_WINDOW):
+
+def paginate(context, window=DEFAULT_WINDOW, hashtag='', margin=DEFAULT_MARGIN):
"""
Renders the ``pagination/pagination.html`` template, resulting in a
Digg-like display of the available pages, given the current page. If there
A dictionary of all of the **GET** parameters in the current request.
This is useful to maintain certain types of state, even when requesting
a different page.
+
+ Argument ``window`` is number to pages before/after current page. If window
+ exceed pagination border (1 and end), window is move to left or right.
+ Argument ``margin``` is number of pages on start/end of pagination.
+ Example:
+ window=2, margin=1, current=6 1 ... 4 5 [6] 7 8 ... 11
+ window=2, margin=0, current=1 [1] 2 3 4 5 ...
+ window=2, margin=0, current=5 ... 3 4 [5] 6 7 ...
+ window=2, margin=0, current=11 ... 7 8 9 10 [11]
"""
+
+ if window < 0:
+ raise Exception, 'Parameter "window" cannot be less than zero'
+ if margin < 0:
+ raise Exception, 'Parameter "margin" cannot be less than zero'
+
try:
paginator = context['paginator']
page_obj = context['page_obj']
page_range = paginator.page_range
- # First and last are simply the first *n* pages and the last *n* pages,
- # where *n* is the current window size.
- first = set(page_range[:window])
- last = set(page_range[-window:])
- # Now we look around our current page, making sure that we don't wrap
- # around.
- current_start = page_obj.number-1-window
- if current_start < 0:
- current_start = 0
- current_end = page_obj.number-1+window
- if current_end < 0:
- current_end = 0
- current = set(page_range[current_start:current_end])
- pages = []
- # If there's no overlap between the first set of pages and the current
- # set of pages, then there's a possible need for elusion.
- if len(first.intersection(current)) == 0:
- first_list = sorted(first)
- second_list = sorted(current)
- pages.extend(first_list)
- diff = second_list[0] - first_list[-1]
- # If there is a gap of two, between the last page of the first
- # set and the first page of the current set, then we're missing a
- # page.
- if diff == 2:
- pages.append(second_list[0] - 1)
- # If the difference is just one, then there's nothing to be done,
- # as the pages need no elusion and are correct.
- elif diff == 1:
- pass
- # Otherwise, there's a bigger gap which needs to be signaled for
- # elusion, by pushing a None value to the page list.
- else:
- pages.append(None)
- pages.extend(second_list)
+ # Calculate the record range in the current page for display.
+ records = {'first': 1 + (page_obj.number - 1) * paginator.per_page}
+ records['last'] = records['first'] + paginator.per_page - 1
+ if records['last'] + paginator.orphans >= paginator.count:
+ records['last'] = paginator.count
+
+ # figure window
+ window_start = page_obj.number - window - 1
+ window_end = page_obj.number + window
+ # solve if window exceeded page range
+ if window_start < 0:
+ window_end = window_end - window_start
+ window_start = 0
+ if window_end > paginator.num_pages:
+ window_start = window_start - (window_end - paginator.num_pages)
+ window_end = paginator.num_pages
+ pages = page_range[window_start:window_end]
+
+ # figure margin and add elipses
+ if margin > 0:
+ # figure margin
+ tmp_pages = set(pages)
+ tmp_pages = tmp_pages.union(page_range[:margin])
+ tmp_pages = tmp_pages.union(page_range[-margin:])
+ tmp_pages = list(tmp_pages)
+ tmp_pages.sort()
+ pages = []
+ pages.append(tmp_pages[0])
+ for i in range(1, len(tmp_pages)):
+ # figure gap size => add elipses or fill in gap
+ gap = tmp_pages[i] - tmp_pages[i - 1]
+ if gap >= 3:
+ pages.append(None)
+ elif gap == 2:
+ pages.append(tmp_pages[i] - 1)
+ pages.append(tmp_pages[i])
else:
- pages.extend(sorted(first.union(current)))
- # If there's no overlap between the current set of pages and the last
- # set of pages, then there's a possible need for elusion.
- if len(current.intersection(last)) == 0:
- second_list = sorted(last)
- diff = second_list[0] - pages[-1]
- # If there is a gap of two, between the last page of the current
- # set and the first page of the last set, then we're missing a
- # page.
- if diff == 2:
- pages.append(second_list[0] - 1)
- # If the difference is just one, then there's nothing to be done,
- # as the pages need no elusion and are correct.
- elif diff == 1:
- pass
- # Otherwise, there's a bigger gap which needs to be signaled for
- # elusion, by pushing a None value to the page list.
- else:
+ if pages[0] != 1:
+ pages.insert(0, None)
+ if pages[-1] != paginator.num_pages:
pages.append(None)
- pages.extend(second_list)
- else:
- pages.extend(sorted(last.difference(current)))
+
to_return = {
+ 'MEDIA_URL': settings.MEDIA_URL,
'pages': pages,
+ 'records': records,
'page_obj': page_obj,
'paginator': paginator,
+ 'hashtag': hashtag,
'is_paginated': paginator.count > paginator.per_page,
}
if 'request' in context:
else:
to_return['getvars'] = ''
return to_return
- except KeyError:
+ except KeyError, AttributeError:
return {}
-register.inclusion_tag('pagination/pagination.html', takes_context=True)(paginate)
+
+register.inclusion_tag('pagination/pagination.html', takes_context=True)(
+ paginate)
register.tag('autopaginate', do_autopaginate)
fnp / django-pagination.git / blobdiff