<template xmlns:v-on="http://www.w3.org/1999/xhtml"
 xmlns:v-bind="http://www.w3.org/1999/xhtml">
 <div class="page-bar">
 <div class="page-size">
 <div>
 <select v-on:change="menuChange()" v-model="limit">
 <option v-for="item in menu" v-bind:value="item">{{item}}</option>
 </select>
 记录/页，显示第 {{start}} 至 {{end}} 项记录，共 {{totalSize}} 项
 </div>
 </div>
 <div class="page-con">
 <ul>
 <li><a v-on:click="firstClick()" v-bind:class="{ 'disabled': cur == 1}">首页</a></li>
 <li><a v-on:click="preClick()" v-bind:class="{ 'disabled': cur == 1}">上一页</a></li>
 <li v-for="per in pages" v-bind:class="{ 'active': cur == per}">
 <a v-on:click="pageClick(per)">{{ per }}</a>
 </li>
 <li><a v-on:click="nextClick()" v-bind:class="{ 'disabled': cur == totalPage}">下一页</a></li>
 <li><a v-on:click="lastClick()" v-bind:class="{ 'disabled': cur == totalPage}">尾页</a></li>
 <li><a>共<i>{{totalPage}}</i>页</a></li>
 </ul>
 </div>
 <div class="clear-both"></div>
 </div>
</template>

<script>
 import Ajax from '../ajax'

 export default{
 props: ['page-model'],
 data () {
 return {
 // 初始页
 cur: 1,
 // 请求地址
 url: this.pageModel.url ? this.pageModel.url : "",
 // 请求参数
 param: this.pageModel.param ? this.pageModel.param : {},
 // 请求方法 默认为GET请求
 method: this.pageModel.method ? this.pageModel.method : 'GET',
 // 每页显示数量 默认每页显示10条
 limit: this.pageModel.menu ? this.pageModel.menu[0] : 10,
 // 底部分页基数 默认5
 perSize: this.pageModel.perSize ? this.pageModel.perSize : 5,
 // 每页显示数量 下拉选项
 menu: this.pageModel.menu ? this.pageModel.menu : [5, 10, 50],
 // 分页参数 自定义名称
 pageParamName: this.pageModel.pageParamName ? this.pageModel.pageParamName : ['page', 'limit'],
 // 当前列表显示记录起始数
 start: 0,
 // 当前列表显示记录结束数
 end: 0,
 // 总页数
 totalPage: 0,
 // 记录总数
 totalSize: 0,
 // 分页请求返回数据
 dataList: []
 }
 },
 ready () {
 this.getData();
 },
 methods: {
 // 首页
 firstClick: function () {
 if (this.cur > 1) {
 this.cur = 1;
 this.getData();
 }
 },
 // 尾页
 lastClick: function () {
 if (this.cur < this.totalPage) {
 this.cur = this.totalPage;
 this.getData();
 }
 },
 // 上一页
 preClick: function () {
 if (this.cur > 1) {
 this.cur--;
 this.getData();
 }
 },
 // 下一页
 nextClick: function () {
 if (this.cur < this.totalPage) {
 this.cur++;
 this.getData();
 }
 },
 // 页码
 pageClick: function (data) {
 if (data != this.cur) {
 this.cur = data;
 this.getData();

 }
 },
 // 刷新显示记录数
 refreshPageCon: function () {
 this.start = (this.cur - 1) * this.limit + 1;
 if (this.totalSize >= this.limit * this.cur) {
 this.end = this.limit * this.cur;
 } else {
 this.end = this.totalSize;
 }
 },
 // 分页请求
 getData: function () {
 let _this = this;
 this.param[this.pageParamName[0]] = this.cur;
 this.param[this.pageParamName[1]] = this.limit;
 Ajax({
 url: _this.url,
 method: _this.method,
 data: _this.param,
 callback: function (res) {
 // 返回结果数据集
 this.dataList = res.data;
 // 返回总记录数
 _this.totalSize = 25;

 _this.totalPage = Math.ceil(_this.totalSize / _this.limit);
 _this.refreshPageCon();
 _this.$dispatch('refresh', this.dataList);
 }
 });
 },
 // 每页显示记录数 下拉
 menuChange: function () {
 this.getData();
 },
 getPage: function (curPage, totalPage, pageNum) {
 var leftPage, rightPage;
 curPage = curPage > 1 ? curPage : 1;
 curPage = curPage > totalPage ? totalPage : curPage;
 totalPage = curPage > totalPage ? curPage : totalPage;
 // 左侧页数
 leftPage = curPage - Math.floor(pageNum / 2);
 leftPage = leftPage > 1 ? leftPage : 1;

 // 右侧页数
 rightPage = curPage + Math.floor(pageNum / 2);
 rightPage = rightPage > totalPage ? totalPage : rightPage;

 var curPageNum = rightPage - leftPage + 1;
 // 左侧调整
 if (curPageNum < pageNum && leftPage > 1) {
 leftPage = leftPage - (pageNum - curPageNum);
 leftPage = leftPage > 1 ? leftPage : 1;
 curPageNum = rightPage - leftPage + 1;
 }

 // 右侧调整
 if (curPageNum < pageNum && rightPage < totalPage) {
 rightPage = rightPage + (pageNum - curPageNum);
 rightPage = rightPage > totalPage ? totalPage : rightPage;
 }

 var arr = [];
 for (var i = leftPage; i <= rightPage; i++) {
 arr.push(i);
 }
 return arr;
 }
 },
 computed: {
 pages: function () {
 return this.getPage(this.cur, this.totalPage, this.perSize);
 }
 }
 }
</script>

<style>
 ul, li {
 margin: 0px;
 padding: 0px;
 }

 li {
 list-style: none;
 display: inline;
 }

 .page-bar li:first-child > a {
 margin-left: 0px
 }

 .page-bar a {
 border: 1px solid #ddd;
 text-decoration: none;
 position: relative;
 float: left;
 padding: 6px 12px;
 margin-left: -1px;
 line-height: 1.42857143;
 color: #337ab7;
 cursor: pointer;
 }

 .page-bar a:hover {
 background-color: #eee;
 }

 .page-bar .active a {
 color: #fff;
 cursor: default;
 background-color: #337ab7;
 border-color: #337ab7;
 }

 .page-bar i {
 font-style: normal;
 color: #d44950;
 margin: 0px 4px;
 font-size: 12px;
 }

 .page-bar .page-con, .page-size {
 width: 50%;
 display: block;
 height: 30px;
 float: left;
 line-height: 30px;
 }

 .page-bar .page-con ul {
 float: right;
 padding-left: 15px;
 padding-right: 15px;
 display: inline-block;
 padding-left: 0;
 }

 .page-bar .page-size div {
 padding-left: 15px;
 padding-right: 15px;
 font-size: 14px;
 }

 a.disabled {
 color: #777;
 background-color: #fff;
 border-color: #ddd;
 cursor: not-allowed;
 }

 a.disabled:hover {
 background-color: #fff;
 }

 .clear-both {
 clear: both;
 }

 select {
 border: solid 1px #ddd;
 appearance: none;
 -moz-appearance: none;
 -webkit-appearance: none;
 background: url("../assets/images/arrow.png") no-repeat scroll right center transparent;
 padding-right: 15px;
 padding-left: 15px;
 padding-top: 2px;
 padding-bottom: 2px;
 }

 select::-ms-expand {
 display: none;
 }
</style>

<template>
 <Navbar></Navbar>
 <div class="row">
 <table class="table">
 <thead>
 <tr>
 <th>标题</th>
 <th width="20%">发布时间</th>
 <th width="10%">作者</th>
 <th width="10%">回复数</th>
 <th width="10%">访问数</th>
 </tr>
 </thead>
 <tbody>
 <tr v-show="!tabelEmpty" v-for="item in dataList">
 <td>{{item.title}}</td>
 <td>{{item.create_at}}</td>
 <td>{{item.author.loginname}}</td>
 <td>{{item.reply_count}}</td>
 <td>{{item.visit_count}}</td>
 </tr>
 <tr v-show="tabelEmpty" class="empty">
 <td colspan="5">没有匹配的记录</td>
 </tr>
 </tbody>
 </table>
 </div>
 <Pagebar :page-model="pageModel"></Pagebar>
</template>
<script>
 import Navbar from '../components/navbar.vue'
 import Pagebar from '../components/table-pagebar.vue'

 export default {//这里是官方的写法，默认导出，ES6
 components: {
 Navbar,
 Pagebar
 },
 data () {
 return {
 allArticle: "",
 dataList: [],
 pageModel: {
 url: 'https://cnodejs.org/api/v1/topics',
 menu: [5, 10, 20]
 },
 }
 },
 computed: {
 tabelEmpty: function () {
 if (this.dataList) {
 return false;
 } else {
 return true;
 }
 }
 },
 events: {
 refresh: function (e) {
 this.dataList = e;
 }
 }
 }
</script>
<style>
 body, table {
 font-size: 12px;
 }

 table {
 table-layout: fixed;
 empty-cells: show;
 border-collapse: collapse;
 width: 100%;
 margin: 10px 0;
 }

 td {
 height: 30px;
 }

 div.row {
 margin-left: 15px;
 margin-right: 15px;
 }

 h1, h2, h3 {
 font-size: 12px;
 margin: 0;
 padding: 0;
 }

 .table {
 border: 1px solid #ddd;
 background: #fff;
 }

 .table thead tr {
 background: #eee;
 }

 .table th {
 background-repeat: repeat-x;
 height: 30px;
 text-align: left;
 vertical-align: middle;
 }

 .table tr.empty {
 text-align: center;
 }

 .table td, .table th {
 border: 1px solid #ddd;
 padding: 0 1em 0;
 }

 .table tr:nth-child(odd) td {
 background-color: #f5f5f5;

 }
</style>