/**
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* carousel 轮播模块
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* MIT Licensed
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*/
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layui.define(['jquery', 'lay'], function(exports){
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"use strict";
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var $ = layui.$;
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var lay = layui.lay;
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var hint = layui.hint();
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var device = layui.device();
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//外部接口
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var carousel = {
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config: {} //全局配置项
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//设置全局项
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,set: function(options){
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var that = this;
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that.config = $.extend({}, that.config, options);
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return that;
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}
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//事件
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,on: function(events, callback){
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return layui.onevent.call(this, MOD_NAME, events, callback);
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}
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}
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//字符常量
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,MOD_NAME = 'carousel', ELEM = '.layui-carousel', THIS = 'layui-this', SHOW = 'layui-show', HIDE = 'layui-hide', DISABLED = 'layui-disabled'
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,ELEM_ITEM = '>*[carousel-item]>*', ELEM_LEFT = 'layui-carousel-left', ELEM_RIGHT = 'layui-carousel-right', ELEM_PREV = 'layui-carousel-prev', ELEM_NEXT = 'layui-carousel-next', ELEM_ARROW = 'layui-carousel-arrow', ELEM_IND = 'layui-carousel-ind'
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//构造器
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,Class = function(options){
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var that = this;
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that.config = $.extend({}, that.config, carousel.config, options);
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that.render();
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};
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//默认配置
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Class.prototype.config = {
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width: '600px'
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,height: '280px'
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,full: false //是否全屏
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,arrow: 'hover' //切换箭头默认显示状态：hover/always/none
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,indicator: 'inside' //指示器位置：inside/outside/none
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,autoplay: true //是否自动切换
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,interval: 3000 //自动切换的时间间隔，不能低于800ms
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,anim: '' //动画类型：default/updown/fade
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,trigger: 'click' //指示器的触发方式：click/hover
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,index: 0 //初始开始的索引
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};
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//轮播渲染
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Class.prototype.render = function(){
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var that = this;
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var options = that.config;
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// 若 elem 非唯一，则拆分为多个实例
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var elem = $(options.elem);
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if(elem.length > 1){
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layui.each(elem, function(){
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carousel.render($.extend({}, options, {
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elem: this
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}));
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});
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return that;
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}
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// 合并 lay-options 属性上的配置信息
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$.extend(options, lay.options(elem[0]));
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options.elem = $(options.elem);
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if(!options.elem[0]) return;
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that.elemItem = options.elem.find(ELEM_ITEM);
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if(options.index < 0) options.index = 0;
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if(options.index >= that.elemItem.length) options.index = that.elemItem.length - 1;
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if(options.interval < 800) options.interval = 800;
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//是否全屏模式
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if(options.full){
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options.elem.css({
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position: 'fixed'
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,width: '100%'
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,height: '100%'
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,zIndex: 9999
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});
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} else {
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options.elem.css({
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width: options.width
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,height: options.height
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});
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}
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options.elem.attr('lay-anim', options.anim);
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//初始焦点状态
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that.elemItem.eq(options.index).addClass(THIS);
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//指示器等动作
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if(that.elemItem.length <= 1) return;
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that.indicator();
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that.arrow();
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that.autoplay();
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that.events();
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};
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//重置轮播
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Class.prototype.reload = function(options){
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var that = this;
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clearInterval(that.timer);
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that.config = $.extend({}, that.config, options);
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that.render();
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};
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//获取上一个等待条目的索引
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Class.prototype.prevIndex = function(){
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var that = this
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,options = that.config;
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var prevIndex = options.index - 1;
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if(prevIndex < 0){
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prevIndex = that.elemItem.length - 1;
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}
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return prevIndex;
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};
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//获取下一个等待条目的索引
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Class.prototype.nextIndex = function(){
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var that = this
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,options = that.config;
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var nextIndex = options.index + 1;
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if(nextIndex >= that.elemItem.length){
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nextIndex = 0;
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}
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return nextIndex;
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};
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//索引递增
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Class.prototype.addIndex = function(num){
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var that = this
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,options = that.config;
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num = num || 1;
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options.index = options.index + num;
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//index不能超过轮播总数量
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if(options.index >= that.elemItem.length){
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options.index = 0;
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}
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};
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//索引递减
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Class.prototype.subIndex = function(num){
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var that = this
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,options = that.config;
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num = num || 1;
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options.index = options.index - num;
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//index不能超过轮播总数量
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if(options.index < 0){
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options.index = that.elemItem.length - 1;
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}
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};
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//自动轮播
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Class.prototype.autoplay = function(){
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var that = this
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,options = that.config;
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if(!options.autoplay) return;
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clearInterval(that.timer);
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that.timer = setInterval(function(){
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that.slide();
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}, options.interval);
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};
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//箭头
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Class.prototype.arrow = function(){
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var that = this
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,options = that.config;
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//模板
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var tplArrow = $([
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'<button class="layui-icon '+ ELEM_ARROW +'" lay-type="sub">'+ (options.anim === 'updown' ? '' : '') +'</button>'
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,'<button class="layui-icon '+ ELEM_ARROW +'" lay-type="add">'+ (options.anim === 'updown' ? '' : '') +'</button>'
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].join(''));
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//预设基础属性
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options.elem.attr('lay-arrow', options.arrow);
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//避免重复插入
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if(options.elem.find('.'+ELEM_ARROW)[0]){
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options.elem.find('.'+ELEM_ARROW).remove();
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}
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options.elem.append(tplArrow);
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//事件
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tplArrow.on('click', function(){
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var othis = $(this)
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,type = othis.attr('lay-type')
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that.slide(type);
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});
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};
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// 跳转到特定下标
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Class.prototype.goto = function(index){
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var that = this;
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var options = that.config;
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if(index > options.index){
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that.slide('add', index - options.index);
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} else if(index < options.index){
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that.slide('sub', options.index - index);
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}
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}
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//指示器
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Class.prototype.indicator = function(){
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var that = this
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,options = that.config;
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//模板
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var tplInd = that.elemInd = $(['<div class="'+ ELEM_IND +'"><ul>'
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,function(){
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var li = [];
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layui.each(that.elemItem, function(index){
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li.push('<li'+ (options.index === index ? ' class="layui-this"' : '') +'></li>');
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});
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return li.join('');
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}()
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,'</ul></div>'].join(''));
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//预设基础属性
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options.elem.attr('lay-indicator', options.indicator);
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//避免重复插入
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if(options.elem.find('.'+ELEM_IND)[0]){
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options.elem.find('.'+ELEM_IND).remove();
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}
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options.elem.append(tplInd);
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if(options.anim === 'updown'){
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tplInd.css('margin-top', -(tplInd.height()/2));
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}
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// 事件
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tplInd.find('li').on(options.trigger === 'hover' ? 'mouseover' : options.trigger, function(){
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that.goto($(this).index());
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});
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};
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//滑动切换
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Class.prototype.slide = function(type, num){
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var that = this
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,elemItem = that.elemItem
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,options = that.config
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,thisIndex = options.index
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,filter = options.elem.attr('lay-filter');
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if(that.haveSlide) return;
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//滑动方向
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if(type === 'sub'){
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that.subIndex(num);
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elemItem.eq(options.index).addClass(ELEM_PREV);
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setTimeout(function(){
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elemItem.eq(thisIndex).addClass(ELEM_RIGHT);
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elemItem.eq(options.index).addClass(ELEM_RIGHT);
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}, 50);
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} else { //默认递增滑
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that.addIndex(num);
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elemItem.eq(options.index).addClass(ELEM_NEXT);
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setTimeout(function(){
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elemItem.eq(thisIndex).addClass(ELEM_LEFT);
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elemItem.eq(options.index).addClass(ELEM_LEFT);
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}, 50);
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}
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//移除过度类
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setTimeout(function(){
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elemItem.removeClass(THIS + ' ' + ELEM_PREV + ' ' + ELEM_NEXT + ' ' + ELEM_LEFT + ' ' + ELEM_RIGHT);
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elemItem.eq(options.index).addClass(THIS);
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that.haveSlide = false; //解锁
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}, 300);
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//指示器焦点
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that.elemInd.find('li').eq(options.index).addClass(THIS)
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.siblings().removeClass(THIS);
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that.haveSlide = true;
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// 回调返回的参数
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var params = {
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index: options.index
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,prevIndex: thisIndex
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,item: elemItem.eq(options.index)
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};
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typeof options.change === 'function' && options.change(params);
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layui.event.call(this, MOD_NAME, 'change('+ filter +')', params);
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};
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//事件处理
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Class.prototype.events = function(){
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var that = this
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,options = that.config;
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if(options.elem.data('haveEvents')) return;
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//移入移出容器
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options.elem.on('mouseenter', function(){
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if (that.config.autoplay === 'always') return;
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clearInterval(that.timer);
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}).on('mouseleave', function(){
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if (that.config.autoplay === 'always') return;
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that.autoplay();
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});
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options.elem.data('haveEvents', true);
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};
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//核心入口
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carousel.render = function(options){
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return new Class(options);
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};
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exports(MOD_NAME, carousel);
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});
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