644 lines
21 KiB
JavaScript
644 lines
21 KiB
JavaScript
;
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(function ($) {
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'use strict';
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function noop() { }
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function throttle(func, wait, options) {
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var context, args, result;
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var timeout = null;
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// 上次执行时间点
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var previous = 0;
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if (!options) options = {};
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// 延迟执行函数
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var later = function () {
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// 若设定了开始边界不执行选项，上次执行时间始终为0
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previous = options.leading === false ? 0 : new Date().getTime();
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timeout = null;
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result = func.apply(context, args);
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if (!timeout) context = args = null;
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};
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return function () {
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var now = new Date().getTime();
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// 首次执行时，如果设定了开始边界不执行选项，将上次执行时间设定为当前时间。
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if (!previous && options.leading === false) previous = now;
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// 延迟执行时间间隔
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var remaining = wait - (now - previous);
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context = this;
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args = arguments;
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// 延迟时间间隔remaining小于等于0，表示上次执行至此所间隔时间已经超过一个时间窗口
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// remaining大于时间窗口wait，表示客户端系统时间被调整过
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if (remaining <= 0 || remaining > wait) {
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clearTimeout(timeout);
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timeout = null;
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previous = now;
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result = func.apply(context, args);
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if (!timeout) context = args = null;
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//如果延迟执行不存在，且没有设定结尾边界不执行选项
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} else if (!timeout && options.trailing !== false) {
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timeout = setTimeout(later, remaining);
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}
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return result;
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};
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}
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var isSafari = function () {
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var ua = navigator.userAgent.toLowerCase();
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if (ua.indexOf('safari') !== -1) {
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return ua.indexOf('chrome') > -1 ? false : true;
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}
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}();
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var settings = {
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readonly: false,
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minCount: 0,
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minCountErrorMessage: '',
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limitCount: Infinity,
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limitCountErrorMessage: '',
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input: '<input type="text" maxLength="20" placeholder="Search...">',
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data: [],
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searchable: true,
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searchNoData: '<li style="color:#ddd">No Results.</li>',
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init: noop,
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choice: noop,
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extendProps: []
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};
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var KEY_CODE = {
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up: 38,
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down: 40,
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enter: 13
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};
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var EVENT_SPACE = {
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click: 'click.iui-dropdown',
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focus: 'focus.iui-dropdown',
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keydown: 'keydown.iui-dropdown',
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keyup: 'keyup.iui-dropdown'
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};
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var ALERT_TIMEOUT_PERIOD = 1000;
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// 创建模板
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function createTemplate() {
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var isLabelMode = this.isLabelMode;
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var searchable = this.config.searchable;
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var templateSearch = searchable ? '<span class="dropdown-search">' + this.config.input + '</span>' : '';
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return isLabelMode ? '<div class="dropdown-display-label"><div class="dropdown-chose-list">' + templateSearch + '</div></div><div class="dropdown-main">{{ul}}</div>' : '<a href="javascript:;" class="dropdown-display" tabindex="0"><span class="dropdown-chose-list"></span><a href="javascript:;" class="dropdown-clear-all" tabindex="0">\xD7</a></a><div class="dropdown-main">' + templateSearch + '{{ul}}</div>';
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}
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// 小于minCount提示的元素
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function minItemsAlert() {
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var _dropdown = this;
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var _config = _dropdown.config;
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var $el = _dropdown.$el;
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var $alert = $el.find('.dropdown-minItem-alert');
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var alertMessage = _config.minCountErrorMessage;
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clearTimeout(_dropdown.itemCountAlertTimer);
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if ($alert.length === 0) {
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if (!alertMessage) {
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alertMessage = '\u6700\u4f4e\u9009\u62e9' + _config.minCount + '\u4E2A';
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}
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$alert = $('<div class="dropdown-minItem-alert">' + alertMessage + '</div>');
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}
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$el.append($alert);
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_dropdown.itemCountAlertTimer = setTimeout(function () {
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$el.find('.dropdown-minItem-alert').remove();
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}, ALERT_TIMEOUT_PERIOD);
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}
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// 超出限制提示
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function maxItemAlert() {
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var _dropdown = this;
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var _config = _dropdown.config;
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var $el = _dropdown.$el;
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var $alert = $el.find('.dropdown-maxItem-alert');
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var alertMessage = _config.limitCountErrorMessage;
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clearTimeout(_dropdown.itemLimitAlertTimer);
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if ($alert.length === 0) {
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if (!alertMessage) {
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alertMessage = '\u6700\u591A\u53EF\u9009\u62E9' + _config.limitCount + '\u4E2A';
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}
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$alert = $('<div class="dropdown-maxItem-alert">' + alertMessage + '</div>');
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}
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$el.append($alert);
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_dropdown.itemLimitAlertTimer = setTimeout(function () {
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$el.find('.dropdown-maxItem-alert').remove();
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}, ALERT_TIMEOUT_PERIOD);
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}
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// select-option 转 ul-li
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function selectToDiv(str) {
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var result = str || '';
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// 移除select标签
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result = result.replace(/<select[^>]*>/gi, '').replace('</select>', '');
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// 移除 optgroup 结束标签
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result = result.replace(/<\/optgroup>/gi, '');
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result = result.replace(/<optgroup[^>]*>/gi, function (matcher) {
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var groupName = /label="(.[^"]*)"(\s|>)/.exec(matcher);
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var groupId = /data\-group\-id="(.[^"]*)"(\s|>)/.exec(matcher);
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return '<li class="dropdown-group" data-group-id="' + (groupId ? groupId[1] : '') + '">' + (groupName ? groupName[1] : '') + '</li>';
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});
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result = result.replace(/<option(.*?)<\/option>/gi, function (matcher) {
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// var value = /value="?([\w\u4E00-\u9FA5\uF900-\uFA2D]+)"?/.exec(matcher);
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var value = $(matcher).val();
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var name = />(.*)<\//.exec(matcher);
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// 强制要求html中使用selected/disabled，而不是selected="selected","disabled="disabled"
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var isSelected = matcher.indexOf('selected') > -1 ? true : false;
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var isDisabled = matcher.indexOf('disabled') > -1 ? true : false;
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var extendAttr = ''
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var extendProps = matcher.replace(/data-(\w+)="?(.[^"]+)"?/g, function ($1) {
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extendAttr += $1 + ' '
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});
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return '<li ' + (isDisabled ? ' disabled' : ' tabindex="0"') + ' data-value="' + (value || '') + '" class="dropdown-option ' + (isSelected ? 'dropdown-chose' : '') + '" ' + extendAttr + '>' + (name ? name[1] : '') + '</li>';
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});
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return result;
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}
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// object-data 转 select-option
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function objectToSelect(data) {
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var dropdown = this;
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var map = {};
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var result = '';
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var name = [];
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var selectAmount = 0;
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var extendProps = dropdown.config.extendProps;
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if (!data || !data.length) {
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return false;
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}
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$.each(data, function (index, val) {
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// disable 权重高于 selected
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var hasGroup = val.groupId;
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var isDisabled = val.disabled ? ' disabled' : '';
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var isSelected = val.selected && !isDisabled ? ' selected' : '';
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var extendAttr = ''
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$.each(extendProps, function (index, value) {
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if (val[value]) {
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extendAttr += 'data-' + value + '="' + val[value] + '" '
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}
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})
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var temp = '<option' + isDisabled + isSelected + ' value="' + val.id + '" ' + extendAttr + '>' + val.name + '</option>';
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if (isSelected) {
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name.push('<span class="dropdown-selected">' + val.name + '<i class="del" data-id="' + val.id + '"></i></span>');
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selectAmount++;
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}
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// 判断是否有分组
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if (hasGroup) {
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if (map[val.groupId]) {
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map[val.groupId] += temp;
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} else {
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// &janking& just a separator
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map[val.groupId] = val.groupName + '&janking&' + temp;
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}
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} else {
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map[index] = temp;
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}
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});
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$.each(map, function (index, val) {
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var option = val.split('&janking&');
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// 判断是否有分组
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if (option.length === 2) {
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var groupName = option[0];
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var items = option[1];
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result += '<optgroup label="' + groupName + '" data-group-id="' + index + '">' + items + '</optgroup>';
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} else {
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result += val;
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}
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});
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return [result, name, selectAmount];
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}
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// select-option 转 object-data
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//
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function selectToObject(el) {
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var $select = el;
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var result = [];
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function readOption(key, el) {
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var $option = $(el);
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this.id = $option.prop('value');
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this.name = $option.text();
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this.disabled = $option.prop('disabled');
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this.selected = $option.prop('selected');
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}
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$.each($select.children(), function (key, el) {
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var tmp = {};
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var tmpGroup = {};
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var $el = $(el);
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if (el.nodeName === 'OPTGROUP') {
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tmpGroup.groupId = $el.data('groupId');
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tmpGroup.groupName = $el.attr('label');
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$.each($el.children(), $.proxy(readOption, tmp));
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$.extend(tmp, tmpGroup);
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} else {
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$.each($el, $.proxy(readOption, tmp));
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}
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result.push(tmp);
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});
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return result;
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}
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var action = {
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show: function (event) {
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event.stopPropagation();
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var _dropdown = this;
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$(document).trigger('click.dropdown');
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_dropdown.$el.addClass('active');
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},
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search: throttle(function (event) {
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var _dropdown = this;
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var _config = _dropdown.config;
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var $el = _dropdown.$el;
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var $input = $(event.target);
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var intputValue = $input.val();
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var data = _dropdown.config.data;
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var result = [];
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if (event.keyCode > 36 && event.keyCode < 41) {
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return;
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}
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$.each(data, function (key, value) {
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if ((value.groupName && value.groupName.toLowerCase().indexOf(intputValue.toLowerCase()) > -1) || value.name.toLowerCase().indexOf(intputValue.toLowerCase()) > -1 || '' + value.id === '' + intputValue) {
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result.push(value);
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}
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});
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$el.find('ul').html(selectToDiv(objectToSelect.call(_dropdown, result)[0]) || _config.searchNoData);
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}, 300),
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control: function (event) {
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var keyCode = event.keyCode;
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var KC = KEY_CODE;
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var index = 0;
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var direct;
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var itemIndex;
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var $items;
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if (keyCode === KC.down || keyCode === KC.up) {
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// 方向
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direct = keyCode === KC.up ? -1 : 1;
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$items = this.$el.find('[tabindex]');
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itemIndex = $items.index($(document.activeElement));
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// 初始
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if (itemIndex === -1) {
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index = direct + 1 ? -1 : 0;
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} else {
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index = itemIndex;
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}
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// 确认位序
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index = index + direct;
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// 最后位循环
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if (index === $items.length) {
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index = 0;
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}
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$items.eq(index).focus();
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event.preventDefault();
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}
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},
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multiChoose: function (event, status) {
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var _dropdown = this;
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var _config = _dropdown.config;
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var $select = _dropdown.$select;
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var $target = $(event.target);
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var value = $target.attr('data-value');
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var hasSelected = $target.hasClass('dropdown-chose');
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var selectedName = [];
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var selectedProp;
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if ($target.hasClass('dropdown-display')) {
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return false;
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}
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if (hasSelected) {
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$target.removeClass('dropdown-chose');
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_dropdown.selectAmount--;
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} else {
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if (_dropdown.selectAmount < _config.limitCount) {
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$target.addClass('dropdown-chose');
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_dropdown.selectAmount++;
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} else {
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maxItemAlert.call(_dropdown);
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return false;
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}
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}
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_dropdown.name = [];
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$.each(_config.data, function (key, item) {
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if ('' + item.id === '' + value) {
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selectedProp = item;
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item.selected = hasSelected ? false : true;
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}
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if (item.selected) {
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selectedName.push(item.name);
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_dropdown.name.push('<span class="dropdown-selected">' + item.name + '<i class="del" data-id="' + item.id + '"></i></span>');
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}
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});
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$select.find('option[value="' + value + '"]').prop('selected', hasSelected ? false : true);
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if (hasSelected && _dropdown.selectAmount < _config.minCount) {
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minItemsAlert.call(_dropdown);
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}
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_dropdown.$choseList.find('.dropdown-selected').remove();
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_dropdown.$choseList.prepend(_dropdown.name.join(''));
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_dropdown.$el.find('.dropdown-display').attr('title', selectedName.join(','));
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_config.choice.call(_dropdown, event, selectedProp);
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},
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singleChoose: function (event) {
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var _dropdown = this;
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var _config = _dropdown.config;
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var $el = _dropdown.$el;
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var $select = _dropdown.$select;
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var $target = $(event.target);
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var value = $target.attr('data-value');
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var hasSelected = $target.hasClass('dropdown-chose');
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if ($target.hasClass('dropdown-chose') || $target.hasClass('dropdown-display')) {
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return false;
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}
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_dropdown.name = [];
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$el.removeClass('active').find('li').not($target).removeClass('dropdown-chose');
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$target.toggleClass('dropdown-chose');
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$.each(_config.data, function (key, item) {
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// id 有可能是数字也有可能是字符串，强制全等有弊端 2017-03-20 22:19:21
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item.selected = false;
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if ('' + item.id === '' + value) {
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item.selected = hasSelected ? 0 : 1;
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if (item.selected) {
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_dropdown.name.push('<span class="dropdown-selected">' + item.name + '<i class="del" data-id="' + item.id + '"></i></span>');
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}
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}
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});
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$select.find('option[value="' + value + '"]').prop('selected', true);
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_dropdown.name.push('<span class="placeholder">' + _dropdown.placeholder + '</span>');
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_dropdown.$choseList.html(_dropdown.name.join(''));
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_config.choice.call(_dropdown, event);
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},
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del: function (event) {
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var _dropdown = this;
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var _config = _dropdown.config;
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var $target = $(event.target);
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var id = $target.data('id');
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// 2017-03-23 15:58:50 测试
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// 10000条数据测试删除，耗时 ~3ms
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$.each(_dropdown.name, function (key, value) {
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if (value.indexOf('data-id="' + id + '"') !== -1) {
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_dropdown.name.splice(key, 1);
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return false;
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}
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});
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$.each(_dropdown.config.data, function (key, item) {
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if ('' + item.id == '' + id) {
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item.selected = false;
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return false;
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}
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});
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_dropdown.selectAmount--;
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_dropdown.$el.find('[data-value="' + id + '"]').removeClass('dropdown-chose');
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_dropdown.$el.find('[value="' + id + '"]').prop('selected', false).removeAttr('selected');
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$target.closest('.dropdown-selected').remove();
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_config.choice.call(_dropdown, event);
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return false;
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},
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clearAll: function (event) {
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var _dropdown = this;
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var _config = _dropdown.config;
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event && event.preventDefault();
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console.log(this)
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this.$choseList.find('.del').each(function (index, el) {
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$(el).trigger('click');
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});
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if (_config.minCount > 0) {
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minItemsAlert.call(_dropdown);
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}
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this.$el.find('.dropdown-display').removeAttr('title');
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return false;
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}
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};
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function Dropdown(options, el) {
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this.$el = $(el);
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this.$select = this.$el.find('select');
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this.placeholder = this.$select.attr('placeholder');
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this.config = options;
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this.name = [];
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this.isSingleSelect = !this.$select.prop('multiple');
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this.selectAmount = 0;
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this.itemLimitAlertTimer = null;
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this.isLabelMode = this.config.multipleMode === 'label';
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this.init();
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}
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Dropdown.prototype = {
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init: function () {
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var _this = this;
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var _config = _this.config;
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var $el = _this.$el;
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_this.$select.hide();
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// 判断dropdown是否单选，是否token模式
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$el.addClass(_this.isSingleSelect ? 'dropdown-single' : _this.isLabelMode ? 'dropdown-multiple-label' : 'dropdown-multiple');
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if (_config.data.length === 0) {
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_config.data = selectToObject(_this.$select);
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}
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var processResult = objectToSelect.call(_this, _config.data);
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_this.name = processResult[1];
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_this.selectAmount = processResult[2];
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_this.$select.html(processResult[0]);
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_this.renderSelect();
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// disabled权重高于readonly
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_this.changeStatus(_config.disabled ? 'disabled' : _config.readonly ? 'readonly' : false);
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_this.config.init();
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},
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// 渲染 select 为 dropdown
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renderSelect: function (isUpdate, isCover) {
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var _this = this;
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var $el = _this.$el;
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var $select = _this.$select;
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var elemLi = selectToDiv($select.prop('outerHTML'));
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var template;
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if (isUpdate) {
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$el.find('ul')[isCover ? 'html' : 'append'](elemLi);
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} else {
|
||
template = createTemplate.call(_this).replace('{{ul}}', '<ul>' + elemLi + '</ul>');
|
||
$el.append(template).find('ul').removeAttr('style class');
|
||
}
|
||
|
||
if (isCover) {
|
||
_this.name = [];
|
||
_this.$el.find('.dropdown-selected').remove();
|
||
_this.$select.val('');
|
||
}
|
||
|
||
_this.$choseList = $el.find('.dropdown-chose-list');
|
||
|
||
if (!_this.isLabelMode) {
|
||
_this.$choseList.html($('<span class="placeholder"></span>').text(_this.placeholder));
|
||
}
|
||
|
||
_this.$choseList.prepend(_this.name ? _this.name.join('') : []);
|
||
},
|
||
bindEvent: function () {
|
||
var _this = this;
|
||
var $el = _this.$el;
|
||
var openHandle = isSafari ? EVENT_SPACE.click : EVENT_SPACE.focus;
|
||
|
||
$el.on(EVENT_SPACE.click, function (event) {
|
||
event.stopPropagation();
|
||
});
|
||
|
||
$el.on(EVENT_SPACE.click, '.del', $.proxy(action.del, _this));
|
||
|
||
// show
|
||
if (_this.isLabelMode) {
|
||
$el.on(EVENT_SPACE.click, '.dropdown-display-label', function () {
|
||
$el.find('input').focus();
|
||
});
|
||
if (_this.config.searchable) {
|
||
$el.on(EVENT_SPACE.focus, 'input', $.proxy(action.show, _this));
|
||
} else {
|
||
$el.on(EVENT_SPACE.click, $.proxy(action.show, _this));
|
||
}
|
||
$el.on(EVENT_SPACE.keydown, 'input', function (event) {
|
||
if (event.keyCode === 8 && this.value === '' && _this.name.length) {
|
||
$el.find('.del').eq(-1).trigger('click');
|
||
}
|
||
});
|
||
} else {
|
||
$el.on(openHandle, '.dropdown-display', $.proxy(action.show, _this));
|
||
$el.on(openHandle, '.dropdown-clear-all', $.proxy(action.clearAll, _this));
|
||
}
|
||
|
||
// 搜索
|
||
$el.on(EVENT_SPACE.keyup, 'input', $.proxy(action.search, _this));
|
||
|
||
// 按下enter键设置token
|
||
$el.on(EVENT_SPACE.keyup, function (event) {
|
||
var keyCode = event.keyCode;
|
||
var KC = KEY_CODE;
|
||
if (keyCode === KC.enter) {
|
||
$.proxy(_this.isSingleSelect ? action.singleChoose : action.multiChoose, _this, event)();
|
||
}
|
||
});
|
||
|
||
// 按下上下键切换token
|
||
$el.on(EVENT_SPACE.keydown, $.proxy(action.control, _this));
|
||
|
||
$el.on(EVENT_SPACE.click, 'li[tabindex]', $.proxy(_this.isSingleSelect ? action.singleChoose : action.multiChoose, _this));
|
||
},
|
||
unbindEvent: function () {
|
||
var _this = this;
|
||
var $el = _this.$el;
|
||
var openHandle = isSafari ? EVENT_SPACE.click : EVENT_SPACE.focus;
|
||
|
||
$el.off(EVENT_SPACE.click);
|
||
$el.off(EVENT_SPACE.click, '.del');
|
||
|
||
// show
|
||
if (_this.isLabelMode) {
|
||
$el.off(EVENT_SPACE.click, '.dropdown-display-label');
|
||
$el.off(EVENT_SPACE.focus, 'input');
|
||
$el.off(EVENT_SPACE.keydown, 'input');
|
||
} else {
|
||
$el.off(openHandle, '.dropdown-display');
|
||
$el.off(openHandle, '.dropdown-clear-all');
|
||
}
|
||
// 搜索
|
||
$el.off(EVENT_SPACE.keyup, 'input');
|
||
// 按下enter键设置token
|
||
$el.off(EVENT_SPACE.keyup);
|
||
// 按下上下键切换token
|
||
$el.off(EVENT_SPACE.keydown);
|
||
$el.off(EVENT_SPACE.click, '[tabindex]');
|
||
},
|
||
changeStatus: function (status) {
|
||
var _this = this;
|
||
if (status === 'readonly') {
|
||
_this.unbindEvent();
|
||
} else if (status === 'disabled') {
|
||
_this.$select.prop('disabled', true);
|
||
_this.unbindEvent();
|
||
} else {
|
||
_this.$select.prop('disabled', false);
|
||
_this.bindEvent();
|
||
}
|
||
},
|
||
update: function (data, isCover) {
|
||
var _this = this;
|
||
var _config = _this.config;
|
||
var $el = _this.$el;
|
||
var _isCover = isCover || false;
|
||
|
||
if (Object.prototype.toString.call(data) !== '[object Array]') {
|
||
return;
|
||
}
|
||
|
||
_config.data = _isCover ? data.slice(0) : _config.data.concat(data);
|
||
|
||
var processResult = objectToSelect.call(_this, _config.data);
|
||
|
||
_this.name = processResult[1];
|
||
_this.selectAmount = processResult[2];
|
||
_this.$select.html(processResult[0]);
|
||
_this.renderSelect(true, _isCover);
|
||
},
|
||
destroy: function () {
|
||
this.unbindEvent();
|
||
this.$el.children().not('select').remove();
|
||
this.$el.removeClass('dropdown-single dropdown-multiple-label dropdown-multiple');
|
||
this.$select.show();
|
||
},
|
||
choose: function (values, status) {
|
||
var valArr = Object.prototype.toString.call(values) === '[object Array]' ? values : [values];
|
||
var _this = this;
|
||
var _status = status !== void 0 ? !!status : true
|
||
$.each(valArr, function (index, value) {
|
||
var $target = _this.$el.find('[data-value="' + value + '"]');
|
||
var targetStatus = $target.hasClass('dropdown-chose');
|
||
if (targetStatus !== _status) {
|
||
$target.trigger(EVENT_SPACE.click, status || true)
|
||
}
|
||
});
|
||
},
|
||
reset: function () {
|
||
action.clearAll.call(this)
|
||
}
|
||
};
|
||
|
||
$(document).on('click.dropdown', function () {
|
||
$('.dropdown-single,.dropdown-multiple,.dropdown-multiple-label').removeClass('active');
|
||
});
|
||
|
||
$.fn.dropdown = function (options) {
|
||
this.each(function (index, el) {
|
||
$(el).data('dropdown', new Dropdown($.extend(true, {}, settings, options), el));
|
||
});
|
||
return this;
|
||
}
|
||
})(jQuery);
|