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"""
自定义分页组件
"""
class Pagination(object):
def __init__(self, current_page, all_count, base_url, params, per_page_num=8, pager_count=11,):
"""
封装分页相关数据
:param current_page: 当前页
:param all_count: 数据库中的数据总条数
:param per_page_num: 每页显示的数据条数
:param base_url: 分页中显示的URL前缀
:param pager_count: 最多显示的页码个数
"""
try:
current_page = int(current_page)
except Exception as e:
current_page = 1
if current_page < 1:
current_page = 1
self.current_page = current_page
self.all_count = all_count
self.per_page_num = per_page_num
self.base_url = base_url
# 总页码
all_pager, tmp = divmod(all_count, per_page_num)
if tmp:
all_pager += 1
self.all_pager = all_pager
self.pager_count = pager_count # 最多显示页码数
self.pager_count_half = int((pager_count - 1) / 2)
import copy
params = copy.deepcopy(params) # 创建保存url副本
params._mutable = True
self.params = params
@property
def start(self):
return (self.current_page - 1) * self.per_page_num
@property
def end(self):
return self.current_page * self.per_page_num
def page_html(self):
# 如果总页码 < 11个：
if self.all_pager <= self.pager_count:
pager_start = 1
pager_end = self.all_pager + 1
# 总页码 > 11
else:
# 当前页如果<=页面上最多显示(11-1)/2个页码
if self.current_page <= self.pager_count_half:
pager_start = 1
pager_end = self.pager_count + 1
# 当前页大于5
else:
# 页码翻到最后
if (self.current_page + self.pager_count_half) > self.all_pager:
pager_start = self.all_pager - self.pager_count + 1
pager_end = self.all_pager + 1
else:
pager_start = self.current_page - self.pager_count_half
pager_end = self.current_page + self.pager_count_half + 1
page_html_list = []
self.params["page"] = 1
first_page = '<li><a href="%s?%s">首页</a></li>' % (self.base_url, self.params.urlencode(),)
page_html_list.append(first_page)
if self.current_page <= 1:
prev_page = '<li class="disabled"><a href="#">上一页</a></li>'
else:
self.params["page"] = self.current_page - 1
prev_page = '<li><a href="%s?%s">上一页</a></li>' % (self.base_url, self.params.urlencode(),)
page_html_list.append(prev_page)
for i in range(pager_start, pager_end):
self.params["page"] = i # 保留每次搜索条件
if i == self.current_page: # 用保存的url副本转换url后缀保持上一次搜索条件
temp = '<li class="active"><a href="%s?%s">%s</a></li>' % (self.base_url, self.params.urlencode(), i,)
else:
temp = '<li><a href="%s?%s">%s</a></li>' % (self.base_url, self.params.urlencode(), i,)
page_html_list.append(temp)
if self.current_page >= self.all_pager:
next_page = '<li class="disabled"><a href="#">下一页</a></li>'
else:
self.params["page"] = self.current_page + 1
next_page = '<li><a href="%s?%s">下一页</a></li>' % (self.base_url, self.params.urlencode(),)
page_html_list.append(next_page)
self.params["page"] = self.all_pager
last_page = '<li><a href="%s?%s">尾页</a></li>' % (self.base_url, self.params.urlencode(),)
page_html_list.append(last_page)
return ''.join(page_html_list)
