46 lines
1.3 KiB
Python
46 lines
1.3 KiB
Python
from math import ceil
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from werkzeug import import_string, cached_property
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class LazyView(object):
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def __init__(self, import_name):
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self.__module__, self.__name__ = import_name.rsplit('.', 1)
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self.import_name = import_name
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@cached_property
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def view(self):
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return import_string(self.import_name)
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def __call__(self, *args, **kwargs):
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return self.view(*args, **kwargs)
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class Pagination(object):
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def __init__(self, page, per_page, total_count):
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self.page = page
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self.per_page = per_page
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self.total_count = total_count
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@property
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def pages(self):
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return int(ceil(self.total_count / float(self.per_page)))
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@property
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def has_prev(self):
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return self.page > 1
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@property
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def has_next(self):
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return self.page < self.pages
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def iter_pages(self, left_edge=2, left_current=2,
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right_current=5, right_edge=2):
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last = 0
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for num in xrange(1, self.pages + 1):
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if num <= left_edge or \
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(num > self.page - left_current - 1 and \
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num < self.page + right_current) or \
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num > self.pages - right_edge:
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if last + 1 != num:
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yield None
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yield num
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last = num
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