683 lines
21 KiB
JavaScript
683 lines
21 KiB
JavaScript
/**
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* dropdown
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* 下拉菜单组件
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*/
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layui.define(['jquery', 'laytpl', 'lay', 'util'], function(exports){
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"use strict";
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var $ = layui.$;
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var laytpl = layui.laytpl;
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var util = layui.util;
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var hint = layui.hint();
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var device = layui.device();
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var clickOrMousedown = (device.mobile ? 'touchstart' : 'mousedown');
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// 模块名
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var MOD_NAME = 'dropdown';
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var MOD_INDEX = 'layui_'+ MOD_NAME +'_index'; // 模块索引名
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var MOD_ID = 'lay-' + MOD_NAME + '-id';
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// 外部接口
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var dropdown = {
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config: {
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customName: { // 自定义 data 字段名
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id: 'id',
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title: 'title',
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children: 'child'
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}
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},
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index: layui[MOD_NAME] ? (layui[MOD_NAME].index + 10000) : 0,
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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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// 操作当前实例
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var thisModule = function(){
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var that = this;
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var options = that.config;
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var id = options.id;
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thisModule.that[id] = that; // 记录当前实例对象
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return {
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config: options,
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// 重置实例
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reload: function(options){
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that.reload.call(that, options);
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},
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reloadData: function(options){
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dropdown.reloadData(id, options);
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},
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close: function () {
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that.remove()
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},
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open: function () {
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that.render()
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}
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}
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};
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// 字符常量
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var STR_ELEM = 'layui-dropdown';
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var STR_HIDE = 'layui-hide';
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var STR_DISABLED = 'layui-disabled';
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var STR_NONE = 'layui-none';
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var STR_ITEM_UP = 'layui-menu-item-up';
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var STR_ITEM_DOWN = 'layui-menu-item-down';
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var STR_MENU_TITLE = 'layui-menu-body-title';
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var STR_ITEM_GROUP = 'layui-menu-item-group';
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var STR_ITEM_PARENT = 'layui-menu-item-parent';
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var STR_ITEM_DIV = 'layui-menu-item-divider';
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var STR_ITEM_CHECKED = 'layui-menu-item-checked';
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var STR_ITEM_CHECKED2 = 'layui-menu-item-checked2';
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var STR_MENU_PANEL = 'layui-menu-body-panel';
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var STR_MENU_PANEL_L = 'layui-menu-body-panel-left';
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var STR_ELEM_SHADE = 'layui-dropdown-shade';
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var STR_GROUP_TITLE = '.'+ STR_ITEM_GROUP + '>.'+ STR_MENU_TITLE;
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// 构造器
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var Class = function(options){
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var that = this;
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that.index = ++dropdown.index;
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that.config = $.extend({}, that.config, dropdown.config, options);
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that.init();
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};
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// 默认配置
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Class.prototype.config = {
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trigger: 'click', // 事件类型
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content: '', // 自定义菜单内容
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className: '', // 自定义样式类名
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style: '', // 设置面板 style 属性
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show: false, // 是否初始即显示菜单面板
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isAllowSpread: true, // 是否允许菜单组展开收缩
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isSpreadItem: true, // 是否初始展开子菜单
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data: [], // 菜单数据结构
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delay: [200, 300], // 延时显示或隐藏的毫秒数，若为 number 类型，则表示显示和隐藏的延迟时间相同，trigger 为 hover 时才生效
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shade: 0, // 遮罩
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accordion: false // 手风琴效果，仅菜单组生效。基础菜单需要在容器上追加 'lay-accordion' 属性。
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};
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// 重载实例
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Class.prototype.reload = function(options, type){
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var that = this;
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that.config = $.extend({}, that.config, options);
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that.init(true, type);
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};
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// 初始化准备
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Class.prototype.init = function(rerender, type){
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var that = this;
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var options = that.config;
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// 若 elem 非唯一
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var elem = $(options.elem);
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if(elem.length > 1){
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layui.each(elem, function(){
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dropdown.render($.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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// 若重复执行 render，则视为 reload 处理
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if(!rerender && elem[0] && elem.attr(MOD_ID)){
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var newThat = thisModule.getThis(elem.attr(MOD_ID));
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if(!newThat) return;
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return newThat.reload(options, type);
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}
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options.elem = $(options.elem);
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// 初始化 id 属性 - 优先取 options > 元素 id > 自增索引
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options.id = 'id' in options ? options.id : (
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elem.attr('id') || that.index
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);
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elem.attr(MOD_ID, options.id);
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// 初始化自定义字段名
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options.customName = $.extend({}, dropdown.config.customName, options.customName);
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if(options.show || (type === 'reloadData' && that.elemView && $('body').find(that.elemView.get(0)).length)) that.render(rerender, type); //初始即显示或者面板弹出之后执行了刷新数据
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that.events(); // 事件
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};
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// 渲染
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Class.prototype.render = function(rerender, type){
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var that = this;
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var options = that.config;
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var customName = options.customName;
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var elemBody = $('body');
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// 默认菜单内容
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var getDefaultView = function(){
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var elemUl = $('<ul class="layui-menu layui-dropdown-menu"></ul>');
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if(options.data.length > 0 ){
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eachItemView(elemUl, options.data)
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} else {
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elemUl.html('<li class="layui-menu-item-none">暂无数据</li>');
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}
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return elemUl;
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};
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// 遍历菜单项
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var eachItemView = function(views, data){
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// var views = [];
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layui.each(data, function(index, item){
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// 是否存在子级
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var isChild = item[customName.children] && item[customName.children].length > 0;
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var isSpreadItem = ('isSpreadItem' in item) ? item.isSpreadItem : options.isSpreadItem
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var title = function(title){
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var templet = item.templet || options.templet;
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if(templet){
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title = typeof templet === 'function'
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? templet(item)
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: laytpl(templet).render(item);
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}
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return title;
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}(util.escape(item[customName.title]));
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// 初始类型
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var type = function(){
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if(isChild){
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item.type = item.type || 'parent';
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}
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if(item.type){
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return ({
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group: 'group'
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,parent: 'parent'
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,'-': '-'
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})[item.type] || 'parent';
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}
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return '';
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}();
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if(type !== '-' && (!item[customName.title] && !item[customName.id] && !isChild)) return;
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//列表元素
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var viewLi = $(['<li'+ function(){
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var className = {
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group: 'layui-menu-item-group'+ (
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options.isAllowSpread ? (
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isSpreadItem ? ' layui-menu-item-down' : ' layui-menu-item-up'
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) : ''
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)
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,parent: STR_ITEM_PARENT
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,'-': 'layui-menu-item-divider'
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};
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if(isChild || type){
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return ' class="'+ className[type] +'"';
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}
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return item.disabled ? ' class="'+ STR_DISABLED +'"' : '';
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}() +'>'
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//标题区
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,function(){
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//是否超文本
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var viewText = ('href' in item) ? (
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'<a href="'+ item.href +'" target="'+ (item.target || '_self') +'">'+ title +'</a>'
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) : title;
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//是否存在子级
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if(isChild){
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return '<div class="'+ STR_MENU_TITLE +'">'+ viewText + function(){
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if(type === 'parent'){
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return '<i class="layui-icon layui-icon-right"></i>';
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} else if(type === 'group' && options.isAllowSpread){
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return '<i class="layui-icon layui-icon-'+ (isSpreadItem ? 'up' : 'down') +'"></i>';
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} else {
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return '';
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}
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}() +'</div>'
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}
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return '<div class="'+ STR_MENU_TITLE +'">'+ viewText +'</div>';
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}()
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,'</li>'].join(''));
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viewLi.data('item', item);
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//子级区
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if(isChild){
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var elemPanel = $('<div class="layui-panel layui-menu-body-panel"></div>');
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var elemUl = $('<ul></ul>');
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if(type === 'parent'){
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elemPanel.append(eachItemView(elemUl, item[customName.children]));
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viewLi.append(elemPanel);
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} else {
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viewLi.append(eachItemView(elemUl, item[customName.children]));
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}
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}
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views.append(viewLi);
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});
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return views;
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};
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// 主模板
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var TPL_MAIN = ['<div class="layui-dropdown layui-border-box layui-panel layui-anim layui-anim-downbit" ' + MOD_ID + '="' + options.id + '">'
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,'</div>'].join('');
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// 如果是右键事件，则每次触发事件时，将允许重新渲染
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if(options.trigger === 'contextmenu' || lay.isTopElem(options.elem[0])) rerender = true;
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// 判断是否已经打开了下拉菜单面板
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if(!rerender && options.elem.data(MOD_INDEX +'_opened')) return;
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// 记录模板对象
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that.elemView = $('.' + STR_ELEM + '[' + MOD_ID + '="' + options.id + '"]');
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if (type === 'reloadData' && that.elemView.length) {
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that.elemView.html(options.content || getDefaultView());
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} else {
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that.elemView = $(TPL_MAIN);
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that.elemView.append(options.content || getDefaultView());
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// 初始化某些属性
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if(options.className) that.elemView.addClass(options.className);
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if(options.style) that.elemView.attr('style', options.style);
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// 记录当前执行的实例索引
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dropdown.thisId = options.id;
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// 插入视图
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that.remove(); // 移除非当前绑定元素的面板
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elemBody.append(that.elemView);
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options.elem.data(MOD_INDEX +'_opened', true);
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// 遮罩
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var shade = options.shade ? ('<div class="'+ STR_ELEM_SHADE +'" style="'+ ('z-index:'+ (that.elemView.css('z-index')-1) +'; background-color: ' + (options.shade[1] || '#000') + '; opacity: ' + (options.shade[0] || options.shade)) +'"></div>') : '';
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that.elemView.before(shade);
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// 如果是鼠标移入事件，则鼠标移出时自动关闭
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if(options.trigger === 'mouseenter'){
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that.elemView.on('mouseenter', function(){
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clearTimeout(thisModule.timer);
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}).on('mouseleave', function(){
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that.delayRemove();
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});
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}
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}
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// 坐标定位
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that.position();
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thisModule.prevElem = that.elemView; // 记录当前打开的元素，以便在下次关闭
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thisModule.prevElem.data('prevElem', options.elem); // 将当前绑定的元素，记录在打开元素的 data 对象中
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// 阻止全局事件
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that.elemView.find('.layui-menu').on(clickOrMousedown, function(e){
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layui.stope(e);
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});
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// 触发菜单列表事件
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that.elemView.find('.layui-menu li').on('click', function(e){
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var othis = $(this);
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var data = othis.data('item') || {};
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var isChild = data[customName.children] && data[customName.children].length > 0;
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var isClickAllScope = options.clickScope === 'all'; // 是否所有父子菜单均触发点击事件
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if(data.disabled) return; // 菜单项禁用状态
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// 普通菜单项点击后的回调及关闭面板
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if((!isChild || isClickAllScope) && data.type !== '-'){
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var ret = typeof options.click === 'function'
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? options.click(data, othis)
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: null;
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ret === false || (isChild || that.remove());
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layui.stope(e);
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}
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});
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// 触发菜单组展开收缩
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that.elemView.find(STR_GROUP_TITLE).on('click', function(e){
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var othis = $(this);
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var elemGroup = othis.parent();
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var data = elemGroup.data('item') || {};
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if(data.type === 'group' && options.isAllowSpread){
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thisModule.spread(elemGroup, options.accordion);
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}
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});
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// 组件打开完毕的事件
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typeof options.ready === 'function' && options.ready(
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that.elemView,
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options.elem
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);
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};
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// 位置定位
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Class.prototype.position = function(obj){
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var that = this;
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var options = that.config;
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lay.position(options.elem[0], that.elemView[0], {
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position: options.position,
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e: that.e,
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clickType: options.trigger === 'contextmenu' ? 'right' : null,
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align: options.align || null
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});
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};
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// 删除视图
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Class.prototype.remove = function(){
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var that = this;
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var options = that.config;
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var prevContentElem = thisModule.prevElem;
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// 若存在已打开的面板元素，则移除
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if(prevContentElem){
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var prevId = prevContentElem.attr(MOD_ID);
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var prevTriggerElem = prevContentElem.data('prevElem');
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var prevInstance = thisModule.getThis(prevId);
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var prevOnClose = prevInstance.config.close;
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prevTriggerElem && prevTriggerElem.data(MOD_INDEX +'_opened', false);
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prevContentElem.remove();
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delete thisModule.prevElem;
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typeof prevOnClose === 'function' && prevOnClose.call(prevInstance.config, prevTriggerElem);
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}
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lay('.' + STR_ELEM_SHADE).remove();
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};
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Class.prototype.normalizedDelay = function(){
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var that = this;
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var options = that.config;
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var delay = [].concat(options.delay);
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return {
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show: delay[0],
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hide: delay[1] !== undefined ? delay[1] : delay[0]
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}
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}
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// 延迟删除视图
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Class.prototype.delayRemove = function(){
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var that = this;
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var options = that.config;
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clearTimeout(thisModule.timer);
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thisModule.timer = setTimeout(function(){
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that.remove();
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}, that.normalizedDelay().hide);
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};
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// 事件
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Class.prototype.events = function(){
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var that = this;
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var options = that.config;
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// 若传入 hover，则解析为 mouseenter
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if(options.trigger === 'hover') options.trigger = 'mouseenter';
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// 解除上一个事件
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if(that.prevElem) that.prevElem.off(options.trigger, that.prevElemCallback);
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// 是否鼠标移入时触发
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var isMouseEnter = options.trigger === 'mouseenter';
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// 记录被绑定的元素及回调
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that.prevElem = options.elem;
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that.prevElemCallback = function(e){
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clearTimeout(thisModule.timer);
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that.e = e;
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// 若为鼠标移入事件，则延迟触发
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isMouseEnter ? (
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thisModule.timer = setTimeout(function(){
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that.render();
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}, that.normalizedDelay().show)
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) : that.render();
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e.preventDefault();
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};
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// 触发元素事件
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options.elem.on(options.trigger, that.prevElemCallback);
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// 如果是鼠标移入事件
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if (isMouseEnter) {
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// 执行鼠标移出事件
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options.elem.on('mouseleave', function(){
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that.delayRemove();
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});
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}
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};
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// 记录所有实例
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thisModule.that = {}; // 记录所有实例对象
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// 获取当前实例对象
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thisModule.getThis = function(id){
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var that = thisModule.that[id];
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if(!that) hint.error(id ? (MOD_NAME +' instance with ID \''+ id +'\' not found') : 'ID argument required');
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return that;
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};
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// 设置菜单组展开和收缩状态
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thisModule.spread = function(othis, isAccordion){
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var contentElem = othis.children('ul');
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var needSpread = othis.hasClass(STR_ITEM_UP);
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var ANIM_MS = 200;
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// 动画执行完成后的操作
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var complete = function() {
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$(this).css({'display': ''}); // 剔除临时 style，以适配外部样式的状态重置;
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};
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// 动画是否正在执行
|
||
if (contentElem.is(':animated')) return;
|
||
|
||
// 展开
|
||
if (needSpread) {
|
||
othis.removeClass(STR_ITEM_UP).addClass(STR_ITEM_DOWN);
|
||
contentElem.hide().stop().slideDown(ANIM_MS, complete);
|
||
} else { // 收缩
|
||
contentElem.stop().slideUp(ANIM_MS, complete);
|
||
othis.removeClass(STR_ITEM_DOWN).addClass(STR_ITEM_UP);
|
||
}
|
||
|
||
// 手风琴
|
||
if (needSpread && isAccordion) {
|
||
var groupSibs = othis.siblings('.' + STR_ITEM_DOWN);
|
||
groupSibs.children('ul').stop().slideUp(ANIM_MS, complete);
|
||
groupSibs.removeClass(STR_ITEM_DOWN).addClass(STR_ITEM_UP);
|
||
}
|
||
};
|
||
|
||
// 全局事件
|
||
(function(){
|
||
var _WIN = $(window);
|
||
var _DOC = $(document);
|
||
|
||
// 自适应定位
|
||
_WIN.on('resize', function(){
|
||
if(!dropdown.thisId) return;
|
||
var that = thisModule.getThis(dropdown.thisId);
|
||
if(!that) return;
|
||
|
||
if((that.elemView && !that.elemView[0]) || !$('.'+ STR_ELEM)[0]){
|
||
return false;
|
||
}
|
||
|
||
var options = that.config;
|
||
|
||
if(options.trigger === 'contextmenu'){
|
||
that.remove();
|
||
} else {
|
||
that.position();
|
||
}
|
||
});
|
||
|
||
|
||
|
||
// 点击任意处关闭
|
||
_DOC.on(clickOrMousedown, function(e){
|
||
if(!dropdown.thisId) return;
|
||
var that = thisModule.getThis(dropdown.thisId)
|
||
if(!that) return;
|
||
|
||
var options = that.config;
|
||
|
||
// 若触发的是绑定的元素，或者属于绑定元素的子元素，则不关闭
|
||
// 满足条件：当前绑定的元素不是 body document，或者不是鼠标右键事件
|
||
if(!(lay.isTopElem(options.elem[0]) || options.trigger === 'contextmenu')){
|
||
if(
|
||
e.target === options.elem[0] ||
|
||
options.elem.find(e.target)[0] ||
|
||
(that.elemView && e.target === that.elemView[0]) ||
|
||
(that.elemView && that.elemView.find(e.target)[0])
|
||
) return;
|
||
}
|
||
|
||
that.remove();
|
||
});
|
||
|
||
// 基础菜单的静态元素事件
|
||
var ELEM_LI = '.layui-menu:not(.layui-dropdown-menu) li';
|
||
_DOC.on('click', ELEM_LI, function(e){
|
||
var othis = $(this);
|
||
var parent = othis.parents('.layui-menu').eq(0);
|
||
var isChild = othis.hasClass(STR_ITEM_GROUP) || othis.hasClass(STR_ITEM_PARENT);
|
||
var filter = parent.attr('lay-filter') || parent.attr('id');
|
||
var options = lay.options(this);
|
||
|
||
// 非触发元素
|
||
if(othis.hasClass(STR_ITEM_DIV)) return;
|
||
|
||
// 非菜单组
|
||
if(!isChild){
|
||
// 选中
|
||
parent.find('.'+ STR_ITEM_CHECKED).removeClass(STR_ITEM_CHECKED); // 清除选中样式
|
||
parent.find('.'+ STR_ITEM_CHECKED2).removeClass(STR_ITEM_CHECKED2); // 清除父级菜单选中样式
|
||
othis.addClass(STR_ITEM_CHECKED); //添加选中样式
|
||
othis.parents('.'+ STR_ITEM_PARENT).addClass(STR_ITEM_CHECKED2); // 添加父级菜单选中样式
|
||
|
||
options.title = options.title || $.trim(othis.children('.'+ STR_MENU_TITLE).text());
|
||
|
||
// 触发事件
|
||
layui.event.call(this, MOD_NAME, 'click('+ filter +')', options);
|
||
}
|
||
});
|
||
|
||
// 基础菜单的展开收缩事件
|
||
_DOC.on('click', (ELEM_LI + STR_GROUP_TITLE), function(e){
|
||
var othis = $(this);
|
||
var elemGroup = othis.parents('.'+ STR_ITEM_GROUP +':eq(0)');
|
||
var options = lay.options(elemGroup[0]);
|
||
var isAccordion = typeof othis.parents('.layui-menu').eq(0).attr('lay-accordion') === 'string';
|
||
|
||
if(('isAllowSpread' in options) ? options.isAllowSpread : true){
|
||
thisModule.spread(elemGroup, isAccordion);
|
||
}
|
||
});
|
||
|
||
// 判断子级菜单是否超出屏幕
|
||
var ELEM_LI_PAR = '.layui-menu .'+ STR_ITEM_PARENT
|
||
_DOC.on('mouseenter', ELEM_LI_PAR, function(e){
|
||
var othis = $(this);
|
||
var elemPanel = othis.find('.'+ STR_MENU_PANEL);
|
||
|
||
if(!elemPanel[0]) return;
|
||
var rect = elemPanel[0].getBoundingClientRect();
|
||
|
||
// 是否超出右侧屏幕
|
||
if(rect.right > _WIN.width()){
|
||
elemPanel.addClass(STR_MENU_PANEL_L);
|
||
// 不允许超出左侧屏幕
|
||
rect = elemPanel[0].getBoundingClientRect();
|
||
if(rect.left < 0){
|
||
elemPanel.removeClass(STR_MENU_PANEL_L);
|
||
}
|
||
}
|
||
|
||
// 是否超出底部屏幕
|
||
if(rect.bottom > _WIN.height()){
|
||
elemPanel.eq(0).css('margin-top', -(rect.bottom - _WIN.height() + 5));
|
||
}
|
||
}).on('mouseleave', ELEM_LI_PAR, function(e){
|
||
var othis = $(this)
|
||
var elemPanel = othis.children('.'+ STR_MENU_PANEL);
|
||
|
||
elemPanel.removeClass(STR_MENU_PANEL_L);
|
||
elemPanel.css('margin-top', 0);
|
||
});
|
||
|
||
})();
|
||
|
||
// 关闭面板
|
||
dropdown.close = function(id){
|
||
var that = thisModule.getThis(id);
|
||
if(!that) return this;
|
||
|
||
that.remove();
|
||
return thisModule.call(that);
|
||
};
|
||
|
||
// 打开面板
|
||
dropdown.open = function(id){
|
||
var that = thisModule.getThis(id);
|
||
if(!that) return this;
|
||
|
||
that.render();
|
||
return thisModule.call(that);
|
||
}
|
||
|
||
// 重载实例
|
||
dropdown.reload = function(id, options, type){
|
||
var that = thisModule.getThis(id);
|
||
if(!that) return this;
|
||
|
||
that.reload(options, type);
|
||
return thisModule.call(that);
|
||
};
|
||
|
||
// 仅重载数据
|
||
dropdown.reloadData = function(){
|
||
var args = $.extend([], arguments);
|
||
args[2] = 'reloadData';
|
||
|
||
// 重载时，与数据相关的参数
|
||
var dataParams = new RegExp('^('+ [
|
||
'data', 'templet', 'content'
|
||
].join('|') + ')$');
|
||
|
||
// 过滤与数据无关的参数
|
||
layui.each(args[1], function (key, value) {
|
||
if(!dataParams.test(key)){
|
||
delete args[1][key];
|
||
}
|
||
});
|
||
|
||
return dropdown.reload.apply(null, args);
|
||
};
|
||
|
||
// 核心入口
|
||
dropdown.render = function(options){
|
||
var inst = new Class(options);
|
||
return thisModule.call(inst);
|
||
};
|
||
|
||
exports(MOD_NAME, dropdown);
|
||
});
|