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paginationutils.py
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Created
Wed, Sep 4, 23:30
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text/x-python
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Fri, Sep 6, 23:30 (2 d)
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R3600 invenio-infoscience
paginationutils.py
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# -*- coding: utf-8 -*-
##
## This file is part of Invenio.
## Copyright (C) 2013 CERN.
##
## Invenio is free software; you can redistribute it and/or
## modify it under the terms of the GNU General Public License as
## published by the Free Software Foundation; either version 2 of the
## License, or (at your option) any later version.
##
## Invenio is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Invenio; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
"""
Invenio pagination helper class.
"""
from
math
import
ceil
class
Pagination
(
object
):
"""Helps with rendering pagination list."""
def
__init__
(
self
,
page
,
per_page
,
total_count
):
self
.
page
=
page
self
.
per_page
=
per_page
self
.
total_count
=
total_count
@property
def
pages
(
self
):
"""Returns number of pages."""
return
int
(
ceil
(
self
.
total_count
/
float
(
self
.
per_page
)))
@property
def
has_prev
(
self
):
"""Returns true if it has previous page."""
return
self
.
page
>
1
@property
def
has_next
(
self
):
"""Returns true if it has next page."""
return
self
.
page
<
self
.
pages
def
iter_pages
(
self
,
left_edge
=
1
,
left_current
=
1
,
right_current
=
3
,
right_edge
=
1
):
last
=
0
for
num
in
xrange
(
1
,
self
.
pages
+
1
):
if
num
<=
left_edge
or
\
(
num
>
self
.
page
-
left_current
-
1
and
num
<
self
.
page
+
right_current
)
or
\
num
>
self
.
pages
-
right_edge
:
if
last
+
1
!=
num
:
yield
None
yield
num
last
=
num
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