stark组件之分页【模仿Django的admin】详解编程语言

class page_helper(): 
    def __init__(self, count, current_page, per_page_num, base_url,parms): 
        self.count = count 
        self.current_page = current_page 
        self.per_page_num = per_page_num 
        self.base_url = base_url 
        self.page_head = "<nav aria-label='Page navigation'><ul class='pagination'>" 
        self.page_tail = "</ul></nav>" 
        import copy 
        parms = copy.deepcopy(parms) 
        parms._mutable = True 
        self.parms = parms 
 
 
    def page_count(self): 
        before, after = divmod(self.count, self.per_page_num) 
        if after > 0: 
            class_count = before + 1 
        else: 
            class_count = before 
        print("-------------",class_count,self.count,self.per_page_num) 
        return class_count 
 
    def page_start(self): 
        if self.page_count() <= 11: 
            start_int = 1 
            end_int = self.page_count() 
        else: 
            if self.current_page <= 6: 
                start_int = 1 
                end_int = 11 
            elif self.current_page + 5 + 1 > self.page_count(): 
                start_int = self.page_count() - 10 
                end_int = self.page_count() + 1 
            else: 
                start_int = self.current_page - 5 
                end_int = self.current_page + 5 + 1 
        return start_int 
 
    def page_end(self): 
        if self.page_count() <= 11: 
            start_int = 1 
            end_int = self.page_count() 
        else: 
            if self.current_page <= 6: 
                start_int = 1 
                end_int = 11 
            elif self.current_page + 5 + 1 > self.page_count(): 
                start_int = self.page_count() - 10 
                end_int = self.page_count() + 1 
            else: 
                start_int = self.current_page - 5 
                end_int = self.current_page + 5 + 1 
 
        return end_int 
 
    def db_start(self): 
        return (self.current_page - 1) * self.per_page_num + 1 
 
    def db_end(self): 
        return self.current_page * self.per_page_num + 1 
 
    def page_list(self): 
        print(self.parms,dir(self.parms),"======================",self.parms.urlencode()) 
        if self.current_page == 1: 
            before_page = "<li class='disable'><a href='#' aria-label='Previous'><span aria-hidden='true'>«</span></a></li>" 
        else: 
            self.parms["p"] = self.current_page - 1 
            before_page = "<li class='disable'><a href='{url}?{args}' aria-label='Previous'><span aria-hidden='true'>«</span></a></li>".format(url=self.base_url, args=self.parms.urlencode()) 
        page_list = [] 
        page_list.append(before_page) 
 
        for i in range(self.page_start(), self.page_end() + 1): 
            self.parms["p"] = i 
            if i == self.current_page: 
 
                s = """<li class="active"><a href="{url}?{args}">{num}</a></li>""".format(url=self.base_url, args=self.parms.urlencode(),num=self.parms["p"]) 
            else: 
                s = """<li><a href="{url}?{args}">{num}</a></li>""".format(url=self.base_url,  args=self.parms.urlencode(),num=self.parms["p"]) 
            page_list.append(s) 
        if self.current_page == self.page_count(): 
            after_page = """<li class='disable'><a href="#" aria-label="Next"><span aria-hidden="true">»</span></a></li>""" 
        else: 
            self.parms["p"] = self.current_page + 1 
            after_page = """<li><a href="{url}?{args}" aria-label="Next"><span aria-hidden="true">»</span></a></li>""".format(url=self.base_url, args=self.parms.urlencode()) 
        page_list.append(after_page) 
        page_body = "".join(page_list) 
        page_str = self.page_head + page_body + self.page_tail 
 
        return page_str 

class Showlist(object): 
    def __init__(self,config,request,new_list,new_data_list): 
        self.config = config 
        self.request = request 
        self.new_list = new_list 
        self.new_data_list = new_data_list 
 
        # 分页显示 
        count = self.new_data_list.count() 
        current_page = int(request.GET.get("p",1)) 
        per_page_num = 3 
        base_url = request.path_info 
        parms = request.GET 
        self.page_str = page.page_helper(count=count,current_page=current_page,per_page_num=per_page_num,base_url=base_url,parms=parms)