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# -*- coding: utf-8 -*-
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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Custom paging classes
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"""
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import math
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import re
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from kallithea.config.routing import url
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from webhelpers.html import literal, HTML
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from webhelpers.paginate import Page as _Page
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class Page(_Page):
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"""
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Custom pager to match rendering style with YUI paginator emitting Bootstrap paginators
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"""
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def __init__(self, *args, **kwargs):
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kwargs.setdefault('url', url.current)
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_Page.__init__(self, *args, **kwargs)
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def _get_pos(self, cur_page, max_page, items):
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edge = (items / 2) + 1
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if (cur_page <= edge):
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radius = max(items / 2, items - cur_page)
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elif (max_page - cur_page) < edge:
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radius = (items - 1) - (max_page - cur_page)
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else:
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radius = items / 2
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left = max(1, (cur_page - (radius)))
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right = min(max_page, cur_page + (radius))
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return left, cur_page, right
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def _range(self, regexp_match):
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"""
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Return range of linked pages (e.g. '1 2 [3] 4 5 6 7 8').
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Arguments:
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regexp_match
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A "re" (regular expressions) match object containing the
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radius of linked pages around the current page in
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regexp_match.group(1) as a string
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This function is supposed to be called as a callable in
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re.sub.
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"""
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radius = int(regexp_match.group(1))
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# Compute the first and last page number within the radius
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# e.g. '1 .. 5 6 [7] 8 9 .. 12'
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# -> leftmost_page = 5
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# -> rightmost_page = 9
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leftmost_page, _cur, rightmost_page = self._get_pos(self.page,
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self.last_page,
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(radius * 2) + 1)
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nav_items = []
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# Create a link to the first page (unless we are on the first page
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# or there would be no need to insert '..' spacers)
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if self.page != self.first_page and self.first_page < leftmost_page:
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nav_items.append(HTML.li(self._pagerlink(self.first_page, self.first_page)))
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# Insert dots if there are pages between the first page
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# and the currently displayed page range
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if leftmost_page - self.first_page > 1:
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# Wrap in a SPAN tag if nolink_attr is set
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text_ = '..'
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if self.dotdot_attr:
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text_ = HTML.span(c=text_, **self.dotdot_attr)
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nav_items.append(HTML.li(text_))
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for thispage in xrange(leftmost_page, rightmost_page + 1):
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# Highlight the current page number and do not use a link
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text_ = str(thispage)
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if thispage == self.page:
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# Wrap in a SPAN tag if nolink_attr is set
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if self.curpage_attr:
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text_ = HTML.li(HTML.span(c=text_), **self.curpage_attr)
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nav_items.append(text_)
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# Otherwise create just a link to that page
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else:
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nav_items.append(HTML.li(self._pagerlink(thispage, text_)))
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# Insert dots if there are pages between the displayed
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# page numbers and the end of the page range
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if self.last_page - rightmost_page > 1:
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text_ = '..'
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# Wrap in a SPAN tag if nolink_attr is set
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if self.dotdot_attr:
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text_ = HTML.span(c=text_, **self.dotdot_attr)
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nav_items.append(HTML.li(text_))
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# Create a link to the very last page (unless we are on the last
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# page or there would be no need to insert '..' spacers)
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if self.page != self.last_page and rightmost_page < self.last_page:
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nav_items.append(HTML.li(self._pagerlink(self.last_page, self.last_page)))
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#_page_link = url.current()
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#nav_items.append(literal('<link rel="prerender" href="%s?page=%s">' % (_page_link, str(int(self.page)+1))))
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#nav_items.append(literal('<link rel="prefetch" href="%s?page=%s">' % (_page_link, str(int(self.page)+1))))
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return self.separator.join(nav_items)
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def pager(self, format='<ul class="pagination">$link_previous ~2~ $link_next</ul>', page_param='page', partial_param='partial',
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show_if_single_page=False, separator=' ', onclick=None,
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symbol_first='<<', symbol_last='>>',
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symbol_previous='<', symbol_next='>',
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link_attr=None,
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curpage_attr=None,
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dotdot_attr=None, **kwargs):
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self.curpage_attr = curpage_attr or {'class': 'active'}
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self.separator = separator
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self.pager_kwargs = kwargs
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self.page_param = page_param
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self.partial_param = partial_param
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self.onclick = onclick
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self.link_attr = link_attr or {'class': 'pager_link', 'rel': 'prerender'}
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self.dotdot_attr = dotdot_attr or {'class': 'pager_dotdot'}
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# Don't show navigator if there is no more than one page
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if self.page_count == 0 or (self.page_count == 1 and not show_if_single_page):
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return ''
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from string import Template
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# Replace ~...~ in token format by range of pages
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result = re.sub(r'~(\d+)~', self._range, format)
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# Interpolate '%' variables
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result = Template(result).safe_substitute({
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'first_page': self.first_page,
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'last_page': self.last_page,
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'page': self.page,
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'page_count': self.page_count,
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'items_per_page': self.items_per_page,
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'first_item': self.first_item,
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'last_item': self.last_item,
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'item_count': self.item_count,
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'link_first': self.page > self.first_page and \
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self._pagerlink(self.first_page, symbol_first) or '',
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'link_last': self.page < self.last_page and \
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self._pagerlink(self.last_page, symbol_last) or '',
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'link_previous': HTML.li(self.previous_page and \
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self._pagerlink(self.previous_page, symbol_previous) \
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or HTML.a(symbol_previous)),
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'link_next': HTML.li(self.next_page and \
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self._pagerlink(self.next_page, symbol_next) \
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or HTML.a(symbol_next))
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})
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return literal(result)
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class RepoPage(Page):
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def __init__(self, collection, page=1, items_per_page=20,
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item_count=None, **kwargs):
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"""Create a "RepoPage" instance. special pager for paging
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repository
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"""
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# TODO: call baseclass __init__
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self._url_generator = kwargs.pop('url', url.current)
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# Safe the kwargs class-wide so they can be used in the pager() method
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self.kwargs = kwargs
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# Save a reference to the collection
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self.original_collection = collection
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self.collection = collection
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# The self.page is the number of the current page.
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# The first page has the number 1!
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try:
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self.page = int(page) # make it int() if we get it as a string
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except (ValueError, TypeError):
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self.page = 1
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self.items_per_page = items_per_page
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# Unless the user tells us how many items the collections has
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# we calculate that ourselves.
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if item_count is not None:
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self.item_count = item_count
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else:
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self.item_count = len(self.collection)
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# Compute the number of the first and last available page
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if self.item_count > 0:
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self.first_page = 1
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self.page_count = int(math.ceil(float(self.item_count) /
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self.items_per_page))
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self.last_page = self.first_page + self.page_count - 1
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# Make sure that the requested page number is the range of
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# valid pages
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if self.page > self.last_page:
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self.page = self.last_page
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elif self.page < self.first_page:
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self.page = self.first_page
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# Note: the number of items on this page can be less than
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# items_per_page if the last page is not full
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self.first_item = max(0, (self.item_count) - (self.page *
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items_per_page))
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self.last_item = ((self.item_count - 1) - items_per_page *
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(self.page - 1))
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self.items = list(self.collection[self.first_item:self.last_item + 1])
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# Links to previous and next page
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if self.page > self.first_page:
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self.previous_page = self.page - 1
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else:
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self.previous_page = None
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if self.page < self.last_page:
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self.next_page = self.page + 1
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else:
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self.next_page = None
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# No items available
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else:
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self.first_page = None
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self.page_count = 0
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self.last_page = None
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self.first_item = None
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self.last_item = None
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self.previous_page = None
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self.next_page = None
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self.items = []
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# This is a subclass of the 'list' type. Initialise the list now.
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list.__init__(self, reversed(self.items))
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