From: Zygmunt Krynicki Date: Mon, 13 Jun 2011 12:45:15 +0000 (+0200) Subject: Merge branch 'master' of git://github.com/tzangms/django-pagination X-Git-Tag: release-2.0~28 X-Git-Url: https://git.mdrn.pl/django-pagination.git/commitdiff_plain/19af5cdf69b55c5bce39f2ca83e12372d395e49c?ds=inline;hp=--cc Merge branch 'master' of git://github.com/tzangms/django-pagination --- 19af5cdf69b55c5bce39f2ca83e12372d395e49c diff --cc linaro_django_pagination/templatetags/pagination_tags.py index 1e7d5da,0000000..f4ddde7 mode 100755,000000..100755 --- a/linaro_django_pagination/templatetags/pagination_tags.py +++ b/linaro_django_pagination/templatetags/pagination_tags.py @@@ -1,282 -1,0 +1,284 @@@ +try: + set +except NameError: + from sets import Set as set + +from django import template +from django.template import TOKEN_BLOCK +from django.http import Http404 +from django.core.paginator import Paginator, InvalidPage +from django.conf import settings + +register = template.Library() + +DEFAULT_PAGINATION = getattr(settings, 'PAGINATION_DEFAULT_PAGINATION', 20) +DEFAULT_WINDOW = getattr(settings, 'PAGINATION_DEFAULT_WINDOW', 4) +DEFAULT_ORPHANS = getattr(settings, 'PAGINATION_DEFAULT_ORPHANS', 0) +INVALID_PAGE_RAISES_404 = getattr(settings, + 'PAGINATION_INVALID_PAGE_RAISES_404', False) +DISPLAY_PAGE_LINKS = getattr(settings, 'PAGINATION_DISPLAY_PAGE_LINKS', True) +PREVIOUS_LINK_DECORATOR = getattr(settings, 'PAGINATION_PREVIOUS_LINK_DECORATOR', "‹‹ ") +NEXT_LINK_DECORATOR = getattr(settings, 'PAGINATION_NEXT_LINK_DECORATOR', " ››") +DISPLAY_DISABLED_PREVIOUS_LINK = getattr(settings, 'PAGINATION_DISPLAY_DISABLED_PREVIOUS_LINK', False) +DISPLAY_DISABLED_NEXT_LINK = getattr(settings, 'PAGINATION_DISPLAY_DISABLED_NEXT_LINK', False) + +def do_autopaginate(parser, token): + """ + Splits the arguments to the autopaginate tag and formats them correctly. + + Syntax is: + + autopaginate SOMETHING [PAGINATE_BY] [ORPHANS] [as NAME] + """ + # Check whether there are any other autopaginations are later in this template + expr = lambda obj: (obj.token_type == TOKEN_BLOCK and \ + len(obj.split_contents()) > 0 and obj.split_contents()[0] == "autopaginate") + multiple_paginations = len(filter(expr, parser.tokens)) > 0 + + i = iter(token.split_contents()) + paginate_by = None + queryset_var = None + context_var = None + orphans = None + word = None + try: + word = i.next() + assert word == "autopaginate" + queryset_var = i.next() + word = i.next() + if word != "as": + paginate_by = word + try: + paginate_by = int(paginate_by) + except ValueError: + pass + word = i.next() + if word != "as": + orphans = word + try: + orphans = int(orphans) + except ValueError: + pass + word = i.next() + assert word == "as" + context_var = i.next() + except StopIteration: + pass + if queryset_var is None: + raise template.TemplateSyntaxError( + "Invalid syntax. Proper usage of this tag is: " + "{%% autopaginate QUERYSET [PAGINATE_BY] [ORPHANS]" + " [as CONTEXT_VAR_NAME] %%}" + ) + return AutoPaginateNode(queryset_var, multiple_paginations, paginate_by, orphans, context_var) + + +class AutoPaginateNode(template.Node): + """ + Emits the required objects to allow for Digg-style pagination. + + First, it looks in the current context for the variable specified, and using + that object, it emits a simple ``Paginator`` and the current page object + into the context names ``paginator`` and ``page_obj``, respectively. + + It will then replace the variable specified with only the objects for the + current page. + + .. note:: + + It is recommended to use *{% paginate %}* after using the autopaginate + 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, multiple_paginations, paginate_by=None, + orphans=None, context_var=None): + if paginate_by is None: + paginate_by = DEFAULT_PAGINATION + if orphans is None: + orphans = DEFAULT_ORPHANS + self.queryset_var = template.Variable(queryset_var) + if isinstance(paginate_by, int): + self.paginate_by = paginate_by + else: + self.paginate_by = template.Variable(paginate_by) + if isinstance(orphans, int): + self.orphans = orphans + else: + self.orphans = template.Variable(orphans) + self.context_var = context_var + self.multiple_paginations = multiple_paginations + + def render(self, context): + if self.multiple_paginations or context.has_key('paginator'): + page_suffix = '_%s' % self.queryset_var + else: + page_suffix = '' + + key = self.queryset_var.var + value = self.queryset_var.resolve(context) + if isinstance(self.paginate_by, int): + paginate_by = self.paginate_by + else: + paginate_by = self.paginate_by.resolve(context) + if isinstance(self.orphans, int): + orphans = self.orphans + else: + orphans = self.orphans.resolve(context) + paginator = Paginator(value, paginate_by, orphans) + try: + page_obj = paginator.page(context['request'].page(page_suffix)) + 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'' + 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 + context['page_suffix'] = page_suffix + return u'' + + +def paginate(context, window=DEFAULT_WINDOW): + """ + Renders the ``pagination/pagination.html`` template, resulting in a + Digg-like display of the available pages, given the current page. If there + are too many pages to be displayed before and after the current page, then + elipses will be used to indicate the undisplayed gap between page numbers. + + Requires one argument, ``context``, which should be a dictionary-like data + structure and must contain the following keys: + + ``paginator`` + A ``Paginator`` or ``QuerySetPaginator`` object. + + ``page_obj`` + This should be the result of calling the page method on the + aforementioned ``Paginator`` or ``QuerySetPaginator`` object, given + the current page. + + This same ``context`` dictionary-like data structure may also include: + + ``getvars`` + 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. + + ``pagination_template`` + A custom template to include in place of the default ``pagination.html`` + contents. + + """ + try: + paginator = context['paginator'] + page_obj = context['page_obj'] + page_suffix = context.get('page_suffix', '') + page_range = paginator.page_range + pagination_template = context.get('pagination_template', 'pagination/default.html') + # 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 + # 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 = list(first) + first_list.sort() + second_list = list(current) + second_list.sort() + 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) + else: + unioned = list(first.union(current)) + unioned.sort() + pages.extend(unioned) + # 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 = list(last) + second_list.sort() + 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: + pages.append(None) + pages.extend(second_list) + else: + differenced = list(last.difference(current)) + differenced.sort() + pages.extend(differenced) + to_return = { ++ 'MEDIA_URL': settings.MEDIA_URL, ++ 'STATIC_URL': settings.STATIC_URL, + 'pages': pages, + 'page_obj': page_obj, + 'paginator': paginator, + 'is_paginated': paginator.count > paginator.per_page, + 'page_suffix': page_suffix, + 'display_page_links': DISPLAY_PAGE_LINKS, + 'display_disabled_previous_link': DISPLAY_DISABLED_PREVIOUS_LINK, + 'display_disabled_next_link': DISPLAY_DISABLED_NEXT_LINK, + 'previous_link_decorator': PREVIOUS_LINK_DECORATOR, + 'next_link_decorator': NEXT_LINK_DECORATOR, + 'pagination_template': pagination_template, + } + if 'request' in context: + getvars = context['request'].GET.copy() + if 'page%s' % page_suffix in getvars: + del getvars['page%s' % page_suffix] + if len(getvars.keys()) > 0: + to_return['getvars'] = "&%s" % getvars.urlencode() + else: + to_return['getvars'] = '' + return to_return + except (KeyError, AttributeError): + return {} + + +register.inclusion_tag( + 'pagination/pagination.html', takes_context=True)(paginate) + +register.tag('autopaginate', do_autopaginate)