yycea/public/assets/addons/wdsxh/common/xlPaging.js

var Paging = /** @class */ (function () {
	function Paging(elementName, options) {
		this.elementName = elementName;
		this.options = options;
		options.nowPage = options.nowPage >= 1 ? options.nowPage : 1;
		options.pageNum = options.pageNum > 0 ? options.pageNum : 0;
		options.totalNum = options.totalNum > 0 ? options.totalNum : 0;
		options.showOne = options.showOne || 0;
		options.buttonNum = (options.buttonNum >= 5 ? options.buttonNum : 5) || 7;
		this.nowPage = options.nowPage > options.pageNum ? options.pageNum : options.nowPage;
		this.pageNum = options.pageNum < 0 ? 0 : options.pageNum;
		this.totalNum = options.totalNum < 0 ? 0 : options.totalNum;
		this.showOne = options.showOne;
		this.buttonNum = options.buttonNum;
		this.callback = options.callback;
		this.element = document.getElementById(elementName);
		this.init();
	}
	Paging.prototype.init = function () {
		this.createHtml();
	};
	Paging.prototype.createHtml = function () {
		var _this = this;
		var content = [];
		//如果pageNum小于等于0则不渲染
		if (this.pageNum <= 0) {
			return '';
		}
		//如果只有一页并且设置为不显示，则不进行渲染
		if (!this.showOne && this.pageNum === 1) {
			this.element.innerHTML = '';
			return '';
		}
		content.push(`<div class='xl-totalPage'>共${this.totalNum}条</div>`);
		content.push("<ul>");
		content.push("<li class='xl-prevPage'>上页</li>");
		//页面总数小于等于当前要展示页数总数，展示所有页面
		if (this.pageNum <= this.buttonNum) {
			for (var i = 1; i <= this.pageNum; i++) {
				if (this.nowPage !== i) {
					content.push("<li>" + i + "</li>");
				}
				else {
					content.push("<li class='xl-active'>" + i + "</li>");
				}
			}
		}
		else if (this.nowPage <= Math.floor(this.buttonNum / 2)) {
			//当前页面小于等于展示页数总数的一半（向下取整），从1开始
			for (var i = 1; i <= this.buttonNum - 2; i++) {
				if (this.nowPage !== i) {
					content.push("<li>" + i + "</li>");
				}
				else {
					content.push("<li class='xl-active'>" + i + "</li>");
				}
			}
			content.push("<li class='xl-disabled'>...</li>");
			content.push("<li>" + this.pageNum + "</li>");
		}
		else if (this.pageNum - this.nowPage <= Math.floor(this.buttonNum / 2)) {
			//当前页面大于展示页数总数的一半（向下取整）
			content.push("<li>" + 1 + "</li>");
			content.push("<li class='xl-disabled'>...</li>");
			for (var i = this.pageNum - this.buttonNum + 3; i <= this.pageNum; i++) {
				if (this.nowPage !== i) {
					content.push("<li>" + i + "</li>");
				}
				else {
					content.push("<li class='xl-active'>" + i + "</li>");
				}
			}
		}
		else {
			//前半部分页码
			if (this.nowPage - Math.floor(this.buttonNum / 2) <= 0) {
				for (var i = 1; i <= Math.floor(this.buttonNum / 2); i++) {
					if (this.nowPage !== i) {
						content.push("<li>" + i + "</li>");
					}
					else {
						content.push("<li class='xl-active'>" + i + "</li>");
					}
				}
			}
			else {
				content.push("<li>" + 1 + "</li>");
				content.push("<li class='xl-disabled'>...</li>");
				for (var i = this.nowPage - Math.floor(this.buttonNum / 2) + (this.buttonNum % 2 == 0 ? 3 : 2); i <= this.nowPage; i++) {
					if (this.nowPage !== i) {
						content.push("<li>" + i + "</li>");
					}
					else {
						content.push("<li class='xl-active'>" + i + "</li>");
					}
				}
			}
			//后半部分页码
			if (this.pageNum - this.nowPage <= 0) {
				for (var i = this.nowPage + 1; i <= this.pageNum; i++) {
					content.push("<li>" + i + "</li>");
				}
			}
			else {
				for (var i = this.nowPage + 1; i <= this.nowPage + Math.floor(this.buttonNum / 2) - 2; i++) {
					content.push("<li>" + i + "</li>");
				}
				content.push("<li class='xl-disabled'>...</li>");
				content.push("<li>" + this.pageNum + "</li>");
			}
		}
		content.push("<li class='xl-nextPage'>下页</li>");
		content.push("</ul>");
		this.element.innerHTML = content.join('');
		// DOM重新生成后每次调用是否禁用button
		setTimeout(function () {
			_this.disabled();
			_this.bindClickEvent();
		}, 20);
	};
	Paging.prototype.bindClickEvent = function () {
		var _this = this;
		var liList = this.element.children[1].children;
		var _loop_1 = function (i) {
			liList[i].removeEventListener('click', function () {
				_this.clickEvent(liList[i]);
			});
		};
		for (var i = 0; i < liList.length; i++) {
			_loop_1(i);
		}
		var _loop_2 = function (i) {
			liList[i].addEventListener('click', function () {
				_this.clickEvent(liList[i]);
			});
		};
		for (var i = 0; i < liList.length; i++) {
			_loop_2(i);
		}
	};
	Paging.prototype.clickEvent = function (li) {
		var cla = li.className;
		var num = parseInt(li.innerHTML);
		var nowPage = this.nowPage;
		if (li.className.indexOf('xl-disabled') !== -1) {
			return '';
		}
		if (cla === 'xl-prevPage') {
			if (nowPage >= 1) {
				this.nowPage -= 1;
			}
		}
		else if (cla === 'xl-nextPage') {
			if (nowPage < this.pageNum) {
				this.nowPage += 1;
			}
		}
		else {
			this.nowPage = num;
		}
		this.createHtml();
		if (this.callback) {
			this.callback(this.nowPage);
		}
	};
	Paging.prototype.disabled = function () {
		var nowPage = this.nowPage;
		var pageNum = this.pageNum;
		var liList = this.element.children[1].children;
		if (nowPage === 1) {
			for (var i = 0; i < liList.length; i++) {
				if (liList[i].className.indexOf('xl-prevPage') !== -1) {
					liList[i].setAttribute('class', liList[i].getAttribute('class').concat(' xl-disabled'));
				}
				if (pageNum === 1 && liList[i].className.indexOf('xl-nextPage') !== -1) {
					liList[i].setAttribute('class', liList[i].getAttribute('class').concat(' xl-disabled'));
				}
			}
		}
		else if (nowPage === pageNum) {
			for (var i = 0; i < liList.length; i++) {
				if (liList[i].className.indexOf('xl-nextPage') !== -1) {
					liList[i].setAttribute('class', liList[i].getAttribute('class').concat(' xl-disabled'));
				}
			}
		}
	};
	return Paging;
}());