7c8fbb6532
git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@1237 fd906abe-77d9-0310-91a1-e0d9ade77398
84 lines
2.4 KiB
Python
84 lines
2.4 KiB
Python
#
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# Copyright (c) 2006 Helmut Merz helmutm@cy55.de
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#
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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 2 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, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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"""
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A browser view class for batching to be used by a macro or some other
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HTML providing template.
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$Id$
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"""
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from zope.cachedescriptors.property import Lazy
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from cybertools.reporter.batch import Batch
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class BatchView(object):
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def __init__(self, context, request, iterable=None):
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self.context = context
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self.request = request
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if iterable is not None:
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self.setup(iterable)
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def setup(self, iterable):
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form = self.request.form
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page = int(form.get('b_page', 1))
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size = int(form.get('b_size', 20))
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overlap = int(form.get('b_overlap', 0))
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orphan = int(form.get('b_orphan', 0))
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self.batch = Batch(iterable, page-1, size, overlap, orphan)
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return self
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def items(self):
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return self.batch.items
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@Lazy
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def current(self):
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return self.info(self.batch.getIndexRelative(0))
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@Lazy
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def first(self):
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return self.info(self.batch.getIndexAbsolute(0))
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@Lazy
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def last(self):
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return self.info(self.batch.getIndexAbsolute(-1))
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@Lazy
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def previous(self):
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return self.info(self.batch.getIndexRelative(-1))
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@Lazy
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def next(self):
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return self.info(self.batch.getIndexRelative(1))
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def urlParams(self, page):
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batch = self.batch
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return ('?b_page=%i&b_size=%i&b_overlap=%i&b_orphan=%i'
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% (page+1, batch.size, batch.overlap, batch.orphan) )
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def url(self, page):
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return str(self.request.URL) + self.urlParams(page)
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def info(self, page):
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return {'title': page+1, 'url': self.url(page)}
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def showNavigation(self):
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return self.first['title'] != self.last['title']
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