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