AngularJS自定义指令详解（有分页插件代码）(5)

/** * 分页插件封装s-pagination.js * @date 2016-05-06 * @author Peter */ angular.module('s.pagination', []).directive('sPagination',[function(){//自定义指令 return { restrict: 'E',//仅限元素名调用 template: '<div>' + '<ul ng-show="conf.totalItems > 0">' + '<li ng-class="{disabled: conf.currentPage == 1}" ng-click="prevPage()"><span>&laquo;</span></li>' + '<li ng-repeat="item in pageList track by $index" ng-class="{active: item == conf.currentPage, separate: item == \'...\'}" ' + 'ng-click="changeCurrentPage(item)">' + '<span>{{ item }}</span>' + '</li>' + '<li ng-class="{disabled: conf.currentPage == conf.numberOfPages}" ng-click="nextPage()"><span>&raquo;</span></li>' + '</ul>' + '<div ng-show="conf.totalItems > 0">' + '第<input type="text" ng-model="jumpPageNum" ng-keyup="jumpToPage($event)"/>页 ' + '每页<select ng-model="conf.itemsPerPage" ng-options="option for option in conf.perPageOptions "></select>' + '/共<strong>{{ conf.totalItems }}</strong>条' + '</div>' + '<div ng-show="conf.totalItems <= 0">暂无数据</div>' + '</div>', replace: true, scope: { conf: '='//双向绑定数据 }, link: function(scope, element, attrs){ // 变更当前页 scope.changeCurrentPage = function(item) { if(item == '...'){ return; }else{ scope.conf.currentPage = item; } }; // 定义分页的长度必须为奇数 (default:5) scope.conf.pagesLength = parseInt(scope.conf.pagesLength) ? parseInt(scope.conf.pagesLength) : 5 ; if(scope.conf.pagesLength % 2 === 0){ // 如果不是奇数的时候处理一下 scope.conf.pagesLength = scope.conf.pagesLength -1; } // conf.erPageOptions if(!scope.conf.perPageOptions){ scope.conf.perPageOptions = [10, 20, 30, 40, 50]; } // pageList数组 function getPagination(newValue, oldValue) { //新增属性search 用于附加搜索条件改变时触发 if(newValue[1] != oldValue[1] || newValue[2] != oldValue[2]) { scope.conf.search = true; } // conf.currentPage scope.conf.currentPage = parseInt(scope.conf.currentPage) ? parseInt(scope.conf.currentPage) : 1; // conf.totalItems scope.conf.totalItems = parseInt(scope.conf.totalItems) ? parseInt(scope.conf.totalItems) : 0; // conf.itemsPerPage (default:15) scope.conf.itemsPerPage = parseInt(scope.conf.itemsPerPage) ? parseInt(scope.conf.itemsPerPage) : 15; // numberOfPages scope.conf.numberOfPages = Math.ceil(scope.conf.totalItems/scope.conf.itemsPerPage); // judge currentPage > scope.numberOfPages if(scope.conf.currentPage < 1){ scope.conf.currentPage = 1; } // 如果分页总数>0，并且当前页大于分页总数 if(scope.conf.numberOfPages > 0 && scope.conf.currentPage > scope.conf.numberOfPages){ scope.conf.currentPage = scope.conf.numberOfPages; } // jumpPageNum scope.jumpPageNum = scope.conf.currentPage; // 如果itemsPerPage在不在perPageOptions数组中，就把itemsPerPage加入这个数组中 var perPageOptionsLength = scope.conf.perPageOptions.length; // 定义状态 var perPageOptionsStatus; for(var i = 0; i < perPageOptionsLength; i++){ if(scope.conf.perPageOptions[i] == scope.conf.itemsPerPage){ perPageOptionsStatus = true; } } // 如果itemsPerPage在不在perPageOptions数组中，就把itemsPerPage加入这个数组中 if(!perPageOptionsStatus){ scope.conf.perPageOptions.push(scope.conf.itemsPerPage); } // 对选项进行sort scope.conf.perPageOptions.sort(function(a, b){return a-b}); scope.pageList = []; if(scope.conf.numberOfPages <= scope.conf.pagesLength){ // 判断总页数如果小于等于分页的长度，若小于则直接显示 for(i =1; i <= scope.conf.numberOfPages; i++){ scope.pageList.push(i); } }else{ // 总页数大于分页长度（此时分为三种情况：1.左边没有...2.右边没有...3.左右都有...） // 计算中心偏移量 var offset = (scope.conf.pagesLength - 1)/2; if(scope.conf.currentPage <= offset){ // 左边没有... for(i =1; i <= offset +1; i++){ scope.pageList.push(i); } scope.pageList.push('...'); scope.pageList.push(scope.conf.numberOfPages); }else if(scope.conf.currentPage > scope.conf.numberOfPages - offset){ scope.pageList.push(1); scope.pageList.push('...'); for(i = offset + 1; i >= 1; i--){ scope.pageList.push(scope.conf.numberOfPages - i); } scope.pageList.push(scope.conf.numberOfPages); }else{ // 最后一种情况，两边都有... scope.pageList.push(1); scope.pageList.push('...'); for(i = Math.ceil(offset/2) ; i >= 1; i--){ scope.pageList.push(scope.conf.currentPage - i); } scope.pageList.push(scope.conf.currentPage); for(i = 1; i <= offset/2; i++){ scope.pageList.push(scope.conf.currentPage + i); } scope.pageList.push('...'); scope.pageList.push(scope.conf.numberOfPages); } } if(scope.conf.onChange){ //请求数据 if(scope.conf.search) { scope.conf.onChange(); scope.conf.search = false; } } scope.$parent.conf = scope.conf; } // prevPage scope.prevPage = function(){ if(scope.conf.currentPage > 1){ scope.conf.currentPage -= 1; } }; // nextPage scope.nextPage = function(){ if(scope.conf.currentPage < scope.conf.numberOfPages){ scope.conf.currentPage += 1; } }; // 跳转页 scope.jumpToPage = function(){ scope.jumpPageNum = scope.jumpPageNum.replace(/[^0-9]/g,''); if(scope.jumpPageNum !== ''){ scope.conf.currentPage = scope.jumpPageNum; } }; scope.$watch(function() { if(!scope.conf.totalItems) { scope.conf.totalItems = 0; } if(angular.isUndefined(scope.conf.search)) { scope.conf.search = false; } var newValue = [scope.conf.totalItems, scope.conf.currentPage, scope.conf.itemsPerPage, scope.conf.search]; return newValue; }, getPagination, true); } }; }]);