249 lines
9.7 KiB
JavaScript
249 lines
9.7 KiB
JavaScript
/*!
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@Title: optimizeSelectOption
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@Description：优化select在layer和表格中显示的问题
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@Site:
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@Author: 岁月小偷
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@License：MIT
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*/
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;!function (factory) {
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'use strict';
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var modelName = 'optimizeSelectOption';
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if (!window.top.layui) {
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// 顶层引入layui是使用该组件的最低要求
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console.warn('使用插件：' + modelName + '页面顶层窗口必须引入layui');
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layui.define(['form'], function (exports) {
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exports(modelName, {msg: '使用插件：' + modelName + '页面顶层窗口必须引入layui'});
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});
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} else {
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// 利用的是顶层的top去弹出，所以用top的layui去use layer确保顶层
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window.top.layui.use('layer', function () {
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layui.define(['form'], function (exports) { //layui加载
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exports(modelName, factory(modelName));
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});
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});
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}
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}(function (modelName) {
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var version = '0.2.0';
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var $ = layui.$;
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var form = layui.form;
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var layer = layui.layer;
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var filePath = layui.cache.modules.optimizeSelectOption
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.substr(0, layui.cache.modules.optimizeSelectOption.lastIndexOf('/'));
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// 引入tablePlug.css
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layui.link(filePath + '/optimizeSelectOption.css?v' + version);
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var selectors = [
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'.layui-table-view', // layui的表格中
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'.layui-layer-content', // 用type:1 弹出的layer中
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'.select_option_to_layer' // 任意其他的位置
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];
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// 记录弹窗的index的变量
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window.top.layer._indexTemp = window.top.layer._indexTemp || {};
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if (!form.render.plugFlag) {
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// 只要未改造过的才需要改造一下
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// 保留一下原始的form.render
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var formRender = form.render;
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form.render = function (type, filter, jqObj) {
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var that = this;
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var retObj;
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// if (jqObj && jqObj.length) {
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if (jqObj) {
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layui.each(jqObj, function (index, elem) {
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elem = $(elem);
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var elemP = elem.parent();
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var formFlag = elemP.hasClass('layui-form');
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var filterTemp = elemP.attr('lay-filter');
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// mark一下当前的
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formFlag ? '' : elemP.addClass('layui-form');
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filterTemp ? '' : elemP.attr('lay-filter', 'tablePlug_form_filter_temp_' + new Date().getTime() + '_' + Math.floor(Math.random() * 100000));
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// 将焦点集中到要渲染的这个的容器上
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retObj = formRender.call(that, type, elemP.attr('lay-filter'));
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// 恢复现场
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formFlag ? '' : elemP.removeClass('layui-form');
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filterTemp ? '' : elemP.attr('lay-filter', null);
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});
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} else {
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retObj = formRender.call(that, type, filter);
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}
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return retObj;
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};
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form.render.plugFlag = true;
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}
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// 关闭弹出的选项
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var close = function () {
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if (!!window.top&&'layer' in window.top) {
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window.top.layer.close(window.top.layer._indexTemp[modelName]);
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}
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};
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// 获得某个节点的位置 offsetTop: 是否获得相对top window的位移
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function getPosition(elem, _window, offsetTop) {
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_window = _window || window;
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elem = elem.length ? elem.get(0) : elem;
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var offsetTemp = {};
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if (offsetTop && _window.top !== _window.self) {
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var frameElem = _window.frames.frameElement;
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offsetTemp = getPosition(frameElem, _window.parent, offsetTop);
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}
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var offset = elem.getBoundingClientRect();
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return {
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top: offset.top + (offsetTemp.top||0),
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left: offset.left + (offsetTemp.left||0)
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};
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}
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var config = {};
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// 针对某个组件的效果优化注册方法
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var render = function (name, options) {
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var that = this;
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if (config.name) {
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console.warn('针对', name, '的显示优化已经存在，请不要重复渲染！');
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return that;
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}
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// 优化select的选项在某些场景下的显示问题
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$(document).on('click'
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, selectors.map(function (value) {
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// return value + ' .layui-select-title,' + value + ' .xm-select-title';
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return value + ' ' + options.triggerElem;
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}).join(',')
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, function (event) {
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layui.stope(event);
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close();
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var triggerElem = $(this);
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var titleElem = triggerElem;
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var dlElem = typeof options.dlElem === 'function' ? options.dlElem(triggerElem) : titleElem.next();
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// var selectElem = titleElem.parent().prev();
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var selectElem = titleElem.parent().prev();
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var selectupFlag = titleElem.parent().hasClass('layui-form-selectup');
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function getDlPosition() {
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var titleElemPosition = getPosition(titleElem, window, true);
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var topTemp = titleElemPosition.top;
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var leftTemp = titleElemPosition.left;
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if (selectupFlag) {
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topTemp = topTemp - dlElem.outerHeight() + titleElem.outerHeight() - parseFloat(dlElem.css('bottom'));
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} else {
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topTemp += parseFloat(dlElem.css('top'));
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}
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if (topTemp + dlElem.outerHeight() > window.top.innerHeight && !selectupFlag) {
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// 出现原始的form表单判断向下弹出，但是最终弹出超出窗口下边界的情形的处理
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selectupFlag = true;
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topTemp -= (dlElem.outerHeight() + (2 * parseFloat(dlElem.css('top')) - titleElem.outerHeight()));
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}
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return {
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top: topTemp,
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left: leftTemp
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};
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}
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var dlPosition = getDlPosition();
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titleElem.css({backgroundColor: 'transparent'});
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window.top.layer._indexTemp[modelName] = window.top.layer.open({
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type: 1,
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title: false,
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closeBtn: 0,
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shade: 0,
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anim: -1,
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fixed: titleElem.closest('.layui-layer-content').length || window.top !== window.self,
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isOutAnim: false,
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// offset: [topTemp + 'px', leftTemp + 'px'],
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offset: [dlPosition.top + 'px', dlPosition.left + 'px'],
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// area: [dlElem.outerWidth() + 'px', dlElem.outerHeight() + 'px'],
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area: dlElem.outerWidth() + 'px',
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content: '<div class="layui-unselect layui-form-select layui-form-selected"></div>',
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skin: 'layui-option-layer',
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success: function (layero, index) {
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dlElem.css({
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top: 0,
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position: 'relative'
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}).appendTo(layero.find('.layui-layer-content').css({overflow: 'hidden'}).find('.layui-form-selected'));
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layero.width(titleElem.width());
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// 原本的做法在ie下获得的是auto其他的浏览器却是确定的值，目前简单处理，先自行计算出来，后面再调优
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var bottom_computed = window.top.innerHeight - layero.outerHeight() - parseFloat(layero.css('top'));
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selectupFlag && (layero.css({top: 'auto', bottom: bottom_computed + 'px'}));
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// 调用各自的success回调
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typeof options.success === 'function' && options.success.call(this, index, layero);
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// 通用的事件处理
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layero.on('mousedown', function (event) {
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layui.stope(event);
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});
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setTimeout(function () {
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// 延迟500毫秒添加事件处理，应对ie浏览器下某一些特定场景下点击select出来option的时候回有一个容器滚动导致直接关闭选项的问题
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// 不包含selectors的选择器的节点
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titleElem.parentsUntil(selectors.join(',')).one('scroll', function (event) {
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// 用window.top.layer去弹出的选项在其title所在的容器滚动的时候都关闭
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close();
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});
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// 单独给选择器的节点加上
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titleElem.parents(selectors.join(',')).one('scroll', function (event) {
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// 用window.top.layer去弹出的选项在其title所在的容器滚动的时候都关闭
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close();
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});
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var windowTemp = window;
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do {
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var $Temp = windowTemp.$ || windowTemp.layui.$;
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if ($Temp) {
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// 点击document的时候触发
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$Temp(windowTemp.document).one('click', function (event) {
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close();
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});
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$Temp(windowTemp.document).one('mousedown', function (event) {
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close();
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});
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// 窗口resize的时候关掉表格中的下拉
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$Temp(windowTemp).one('resize', function (event) {
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close();
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});
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// 监听滚动在必要的时候关掉select的选项弹出（主要是在多级的父子页面的时候）
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$Temp(windowTemp.document).one('scroll', function () {
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if (top !== self &&!!parent&& 'parent' in parent&& parent.parent) {
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// 多级嵌套的窗口就直接关掉了
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close();
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}
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});
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}
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} while (windowTemp.self !== windowTemp.top ? windowTemp = windowTemp.parent : false);
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}, 500);
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},
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end: function () {
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typeof options.end === 'function' && options.end.call(this, selectElem);
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}
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});
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});
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};
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// 内置初始化layui的select的效果，目前还不够晚上不提供给外部注册一些其他有类似问题的组件的处理
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render('layuiSelect', {
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triggerElem: 'div:not(.layui-select-disabled)>.layui-select-title', // 触发的选择器
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success: function (index, layero) {
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// layui 的select是单选点击一个的时候就关闭layer
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layero.find('dl dd').click(function () {
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close();
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});
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},
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end: function (selectElem) {
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form.render('select', null, selectElem);
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}
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});
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return {
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version: version,
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getPosition: getPosition,
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close: close
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// render: render // 不完善，暂不对外提供
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};
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});
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