727 lines
21 KiB
JavaScript
727 lines
21 KiB
JavaScript
function debounce(func, wait, immediate) {
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var timeout, result;
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var debounced = function () {
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var context = this;
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var args = arguments;
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if (timeout) clearTimeout(timeout);
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if (immediate) {
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// 如果已经执行过，不再执行
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var callNow = !timeout;
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timeout = setTimeout(function () {
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timeout = null;
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}, wait);
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if (callNow) result = func.apply(context, args);
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}
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else {
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timeout = setTimeout(function () {
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func.apply(context, args);
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}, wait);
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}
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return result;
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};
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debounced.cancel = function () {
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clearTimeout(timeout);
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timeout = null;
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};
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return debounced;
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}
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// 防抖的原理就是：
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// 你尽管触发事件，但是我一定在事件触发 n 秒后才执行，如果你在一个事件触发的 n 秒内又触发了这个事件，那我就以新的事件的时间为准，n 秒后才执行，总之，就是要等你触发完事件 n 秒内不再触发事件，我才执行!
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// function getUserAction(e) {
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// ...
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// };
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// // 防抖
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// var setUseAction = debounce(getUserAction, 10000, true);
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// // 取消
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// setUseAction.cancel();
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function throttle(func, wait, options) {
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var timeout, context, args;
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var previous = 0;
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if (!options) options = {};
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var later = function() {
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previous = options.leading === false ? 0 : new Date().getTime();
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timeout = null;
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func.apply(context, args);
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if (!timeout) context = args = null;
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};
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var throttled = function() {
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var now = new Date().getTime();
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if (!previous && options.leading === false) previous = now;
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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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if (remaining <= 0 || remaining > wait) {
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if (timeout) {
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clearTimeout(timeout);
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timeout = null;
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}
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previous = now;
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func.apply(context, args);
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if (!timeout) context = args = null;
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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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};
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throttled.cancel = function() {
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clearTimeout(timeout);
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previous = 0;
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timeout = null;
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};
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return throttled;
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}
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// 节流的原理：
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// 如果你持续触发事件，每隔一段时间，只执行一次事件。
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// 根据首次是否执行以及结束后是否执行，效果有所不同，实现的方式也有所不同。 我们用 leading 代表首次是否执行，trailing 代表结束后是否再执行一次。
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// throttle(getUserAction, 1000);
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// //leading：false 表示禁用第一次执行
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// throttle(getUserAction, 1000, {
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// leading: false
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// });
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// //trailing: false 表示禁用停止触发的回调
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// throttle(getUserAction, 1000, {
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// trailing: false
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// });
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function transformJson(a, idStr, pidStr, chindrenStr) {
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var r = [], hash = {}, id = idStr, pid = pidStr, children = chindrenStr, i = 0, j = 0, len = a.length;
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for (; i < len; i++) {
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hash[a[i][id]] = a[i];
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}
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for (; j < len; j++) {
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var aVal = a[j], hashVP = hash[aVal[pid]];
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if (hashVP) {
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!hashVP[children] && (hashVP[children] = []);
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hashVP[children].push(aVal);
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} else {
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r.push(aVal);
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}
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}
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return r;
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}
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// // 二维字符串
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// var jsonData = [{"belongsname":"","id":901,"isleaf":0,"name":"XJBHX-2标项目部","pid":"","type":""},{"belongsname":"","id":902,"isleaf":1,"name":"综合部(办公室)","pid":"901","type":""},{"belongsname":"","id":903,"isleaf":1,"name":"工程部(工技部/技术部)","pid":"901","type":""},{"belongsname":"","id":904,"isleaf":1,"name":"安质部","pid":"901","type":""},{"belongsname":"","id":905,"isleaf":1,"name":"计财部","pid":"901","type":""},{"belongsname":"","id":906,"isleaf":1,"name":"物设部(物机部)","pid":"901","type":""},{"belongsname":"","id":907,"isleaf":1,"name":"中心试验室","pid":"901","type":""}];
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// //绑定的字段
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// var jsonDataTree = transData(jsonData, 'id', 'pid', 'chindren');
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// 加载带回调js
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// loadScript('https://cdn.bootcss.com/Turf.js/5.1.6/turf.min.js',function(){
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// console.log('onload');
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// console.log(turf);
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// });
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function loadScriptCallback(src, callback) {
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var script = document.createElement('script'),
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head = document.getElementsByTagName('head')[0];
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script.type = 'text/javascript';
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script.charset = 'UTF-8';
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script.src = src;
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if (script.addEventListener) {
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script.addEventListener('load', function () {
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callback();
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}, false);
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} else if (script.attachEvent) {
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script.attachEvent('onreadystatechange', function () {
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var target = window.event.srcElement;
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if (target.readyState == 'loaded') {
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callback();
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}
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});
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}
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head.appendChild(script);
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}
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// 动态加载js脚本文件
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// loadScript("javascript/lib/cookie.js");
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function loadScript(url) {
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var script = document.createElement("script");
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script.type = "text/javascript";
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script.src = url;
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document.body.appendChild(script);
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}
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// 动态加载js脚本
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// var text = "function test(){alert('test');}";
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// loadScriptString(text);
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// test();
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function loadScriptString(code) {
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var script = document.createElement("script");
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script.type = "text/javascript";
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try{
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// firefox、safari、chrome和Opera
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script.appendChild(document.createTextNode(code));
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}catch(ex) {
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// IE早期的浏览器 ,需要使用script的text属性来指定javascript代码。
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script.text = code;
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}
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document.body.appendChild(script);
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}
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// 动态加载css文件
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// loadStyles("css/secondindex.css");
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function loadStyles(url) {
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var link = document.createElement("link");
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link.type = "text/css";
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link.rel = "stylesheet";
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link.href = url;
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document.getElementsByTagName("head")[0].appendChild(link);
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}
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// 动态加载css脚本
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// var css = "body{color:blue;}";
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// loadStyleString(css);
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function loadStyleString(cssText) {
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var style = document.createElement("style");
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style.type = "text/css";
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try{
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// firefox、safari、chrome和Opera
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style.appendChild(document.createTextNode(cssText));
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}catch(ex) {
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// IE早期的浏览器 ,需要使用style元素的stylesheet属性的cssText属性
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style.styleSheet.cssText = cssText;
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}
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document.getElementsByTagName("head")[0].appendChild(style);
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}
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function getExt(filename) {
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if (typeof filename == 'string') {
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return filename
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.split('.')
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.pop()
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.toLowerCase()
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} else {
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throw new Error('filename must be a string type')
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}
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}
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// getExt("1.text") //->text
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function copyToBoard(value) {
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const element = document.createElement('textarea');
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document.body.appendChild(element);
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element.value = value;
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element.select();
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if (document.execCommand('copy')) {
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document.execCommand('copy');
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document.body.removeChild(element);
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return true
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}
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document.body.removeChild(element);
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return false
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}
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// 原理：
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// 创建一个textare元素并调用select()方法选中
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// document.execCommand('copy')方法，拷贝当前选中内容到剪贴板。
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//如果复制成功返回true
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// copyToBoard('lalallala')
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function sleep(ms) {
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return new Promise(resolve => setTimeout(resolve, ms));
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}
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//使用方式
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// const fetchData = async () => {
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// await sleep(1000)
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// }
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function uuid(length, chars) {
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chars =
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chars ||
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'0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
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length = length || 8;
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var result = '';
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for (var i = length; i > 0; --i)
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result += chars[Math.floor(Math.random() * chars.length)];
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return result
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}
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// 使用方式
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//第一个参数指定位数，第二个字符串指定字符，都是可选参数，如果都不传，默认生成8位
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// uuid()
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// 保留小数点以后几位，默认2位
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function cutNumber(number, no = 2) {
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if (typeof number != 'number') {
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number = Number(number);
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}
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return Number(number.toFixed(no))
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}
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// 使用场景：JS的浮点数超长，有时候页面显示时需要保留2位小数
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function getFormData(object) {
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const formData = new FormData();
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Object.keys(object).forEach(key => {
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const value = object[key];
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if (Array.isArray(value)) {
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value.forEach((subValue, i) =>
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formData.append(key + `[${i}]`, subValue)
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);
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} else {
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formData.append(key, object[key]);
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}
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});
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return formData
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}
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// 使用场景：上传文件时我们要新建一个FormData对象，然后有多少个参数就append多少次，使用该函数可以简化逻辑
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// 使用方式：
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// let req={
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// file:xxx,
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// userId:1,
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// phone:'15198763636',
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// //...
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// }
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// fetch(getFormData(req))
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function getQueryValue(queryName) {
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let reg = new RegExp("(^|&)" + queryName + "=([^&]*)(&|$)", "i");
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let r = window.location.search.substr(1).match(reg);
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if (r != null) {
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return decodeURI(r[2]);
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} else {
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return null;
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}
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}
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// 示例URL:
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// http://htmlJsTest/getrequest.html?uid=admin&rid=1&fid=2&name=小明
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// @param {[string]} queryName [参数名]
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// @return {[string]} [参数值]
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function objExtension (inObj, path, parms) {
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// 一个长得像对象的字符串
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var Things = path.split(".");
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// 即将返回的对象
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var obj = inObj;
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// 不断迭代的key值
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var key = "";
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// 赋值
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var strparms = JSON.stringify(parms);
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for (var i = 0; i < Things.length; i++) {
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// 累加key
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key += Things[i];
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// 如果对象不存在
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if (!eval("obj." + key)) {
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// 则创建它
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eval("obj." + key + " = {}");
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}
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// 如果是最后一个的话
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if (i === Things.length - 1) {
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eval("obj." + key + " = " + strparms);
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}
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// 再叠加一次.
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key += ".";
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}
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// 循环结束，返回对象
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return obj
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}
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// var path = "D01.D0104.D010442.D01044207.D0104420707.D010442070701"
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// objExtension({a: 123}, path, {id: 123, label: 321})
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function getRequest(urlStr) {
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let url = decodeURI(location.search);
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if (typeof urlStr !== "undefined") {
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url = "?" + urlStr.split("?")[1];
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}
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let theRequest = new Object();
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if (url.indexOf("?") != -1) {
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let str = url.substr(1);
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let strs = str.split("&");
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for (var i = 0; i < strs.length; i++) {
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theRequest[strs[i].split("=")[0]] = decodeURI(strs[i].split("=")[1]);
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}
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}
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return theRequest;
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}
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// 示例URL:
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// http://htmlJsTest/getrequest.html?uid=admin&rid=1&fid=2&name=小明
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// @param {[string]} urlStr [当该参数不为空的时候，则解析该url中的参数集合]
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// @return {[string]} [参数集合]
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/* eslint-disable promise/prefer-await-to-then */
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const methodMap = [['requestFullscreen', 'exitFullscreen', 'fullscreenElement', 'fullscreenEnabled', 'fullscreenchange', 'fullscreenerror'], // New WebKit
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['webkitRequestFullscreen', 'webkitExitFullscreen', 'webkitFullscreenElement', 'webkitFullscreenEnabled', 'webkitfullscreenchange', 'webkitfullscreenerror'], // Old WebKit
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['webkitRequestFullScreen', 'webkitCancelFullScreen', 'webkitCurrentFullScreenElement', 'webkitCancelFullScreen', 'webkitfullscreenchange', 'webkitfullscreenerror'], ['mozRequestFullScreen', 'mozCancelFullScreen', 'mozFullScreenElement', 'mozFullScreenEnabled', 'mozfullscreenchange', 'mozfullscreenerror'], ['msRequestFullscreen', 'msExitFullscreen', 'msFullscreenElement', 'msFullscreenEnabled', 'MSFullscreenChange', 'MSFullscreenError']];
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const nativeAPI = (() => {
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const unprefixedMethods = methodMap[0];
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const returnValue = {};
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for (const methodList of methodMap) {
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const exitFullscreenMethod = methodList[1];
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if (exitFullscreenMethod in document) {
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for (const [index, method] of methodList.entries()) {
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returnValue[unprefixedMethods[index]] = method;
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}
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return returnValue;
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}
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}
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return false;
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})();
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const eventNameMap = {
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change: nativeAPI.fullscreenchange,
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error: nativeAPI.fullscreenerror
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}; // eslint-disable-next-line import/no-mutable-exports
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let screenfull = {
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// eslint-disable-next-line default-param-last
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request(element = document.documentElement, options) {
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return new Promise((resolve, reject) => {
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const onFullScreenEntered = () => {
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screenfull.off('change', onFullScreenEntered);
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resolve();
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};
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screenfull.on('change', onFullScreenEntered);
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const returnPromise = element[nativeAPI.requestFullscreen](options);
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if (returnPromise instanceof Promise) {
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returnPromise.then(onFullScreenEntered).catch(reject);
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}
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});
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},
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exit() {
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return new Promise((resolve, reject) => {
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if (!screenfull.isFullscreen) {
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resolve();
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return;
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}
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const onFullScreenExit = () => {
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screenfull.off('change', onFullScreenExit);
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resolve();
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};
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screenfull.on('change', onFullScreenExit);
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const returnPromise = document[nativeAPI.exitFullscreen]();
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if (returnPromise instanceof Promise) {
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returnPromise.then(onFullScreenExit).catch(reject);
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}
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});
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},
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toggle(element, options) {
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return screenfull.isFullscreen ? screenfull.exit() : screenfull.request(element, options);
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},
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onchange(callback) {
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screenfull.on('change', callback);
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},
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onerror(callback) {
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screenfull.on('error', callback);
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},
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on(event, callback) {
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const eventName = eventNameMap[event];
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if (eventName) {
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document.addEventListener(eventName, callback, false);
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}
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},
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off(event, callback) {
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const eventName = eventNameMap[event];
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if (eventName) {
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document.removeEventListener(eventName, callback, false);
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}
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},
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raw: nativeAPI
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};
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Object.defineProperties(screenfull, {
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isFullscreen: {
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get: () => Boolean(document[nativeAPI.fullscreenElement])
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},
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element: {
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enumerable: true,
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get: () => document[nativeAPI.fullscreenElement] || undefined
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},
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isEnabled: {
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enumerable: true,
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// Coerce to boolean in case of old WebKit.
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get: () => Boolean(document[nativeAPI.fullscreenEnabled])
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}
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});
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if (!nativeAPI) {
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screenfull = {
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isEnabled: false
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};
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}
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function isFullscreenEnabled() {
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return !!(
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document.webkitIsFullScreen ||
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document.mozFullScreen ||
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document.msFullscreenElement ||
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document.fullscreenElement
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);
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}
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//定义一些常量
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var x_PI = 3.14159265358979324 * 3000.0 / 180.0;
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var PI = 3.1415926535897932384626;
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var a = 6378245.0;
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var ee = 0.00669342162296594323;
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/**
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* 百度坐标系 (BD-09) 与 火星坐标系 (GCJ-02)的转换
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* 即 百度 转 谷歌、高德
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* @param bd_lon
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* @param bd_lat
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* @returns {*[]}
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*/
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function bd09togcj02(bd_lon, bd_lat) {
|
||
var bd_lon = +bd_lon;
|
||
var bd_lat = +bd_lat;
|
||
var x = bd_lon - 0.0065;
|
||
var y = bd_lat - 0.006;
|
||
var z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_PI);
|
||
var theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_PI);
|
||
var gg_lng = z * Math.cos(theta);
|
||
var gg_lat = z * Math.sin(theta);
|
||
return [gg_lng, gg_lat]
|
||
}/**
|
||
* 火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换
|
||
* 即谷歌、高德 转 百度
|
||
* @param lng
|
||
* @param lat
|
||
* @returns {*[]}
|
||
*/
|
||
function gcj02tobd09(lng, lat) {
|
||
var lat = +lat;
|
||
var lng = +lng;
|
||
var z = Math.sqrt(lng * lng + lat * lat) + 0.00002 * Math.sin(lat * x_PI);
|
||
var theta = Math.atan2(lat, lng) + 0.000003 * Math.cos(lng * x_PI);
|
||
var bd_lng = z * Math.cos(theta) + 0.0065;
|
||
var bd_lat = z * Math.sin(theta) + 0.006;
|
||
return [bd_lng, bd_lat]
|
||
}/**
|
||
* WGS84转GCj02
|
||
* @param lng
|
||
* @param lat
|
||
* @returns {*[]}
|
||
*/
|
||
function wgs84togcj02(lng, lat) {
|
||
var lat = +lat;
|
||
var lng = +lng;
|
||
if (out_of_china(lng, lat)) {
|
||
return [lng, lat]
|
||
} else {
|
||
var dlat = transformlat(lng - 105.0, lat - 35.0);
|
||
var dlng = transformlng(lng - 105.0, lat - 35.0);
|
||
var radlat = lat / 180.0 * PI;
|
||
var magic = Math.sin(radlat);
|
||
magic = 1 - ee * magic * magic;
|
||
var sqrtmagic = Math.sqrt(magic);
|
||
dlat = (dlat * 180.0) / ((a * (1 - ee)) / (magic * sqrtmagic) * PI);
|
||
dlng = (dlng * 180.0) / (a / sqrtmagic * Math.cos(radlat) * PI);
|
||
var mglat = lat + dlat;
|
||
var mglng = lng + dlng;
|
||
return [mglng, mglat]
|
||
}
|
||
}/**
|
||
* GCJ02 转换为 WGS84
|
||
* @param lng
|
||
* @param lat
|
||
* @returns {*[]}
|
||
*/
|
||
function gcj02towgs84(lng, lat) {
|
||
var lat = +lat;
|
||
var lng = +lng;
|
||
if (out_of_china(lng, lat)) {
|
||
return [lng, lat]
|
||
} else {
|
||
var dlat = transformlat(lng - 105.0, lat - 35.0);
|
||
var dlng = transformlng(lng - 105.0, lat - 35.0);
|
||
var radlat = lat / 180.0 * PI;
|
||
var magic = Math.sin(radlat);
|
||
magic = 1 - ee * magic * magic;
|
||
var sqrtmagic = Math.sqrt(magic);
|
||
dlat = (dlat * 180.0) / ((a * (1 - ee)) / (magic * sqrtmagic) * PI);
|
||
dlng = (dlng * 180.0) / (a / sqrtmagic * Math.cos(radlat) * PI);
|
||
var mglat = lat + dlat;
|
||
var mglng = lng + dlng;
|
||
return [lng * 2 - mglng, lat * 2 - mglat]
|
||
}
|
||
}
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
var transformlat = function transformlat(lng, lat) {
|
||
var lat = +lat;
|
||
var lng = +lng;
|
||
var ret = -100.0 + 2.0 * lng + 3.0 * lat + 0.2 * lat * lat + 0.1 * lng * lat + 0.2 * Math.sqrt(Math.abs(lng));
|
||
ret += (20.0 * Math.sin(6.0 * lng * PI) + 20.0 * Math.sin(2.0 * lng * PI)) * 2.0 / 3.0;
|
||
ret += (20.0 * Math.sin(lat * PI) + 40.0 * Math.sin(lat / 3.0 * PI)) * 2.0 / 3.0;
|
||
ret += (160.0 * Math.sin(lat / 12.0 * PI) + 320 * Math.sin(lat * PI / 30.0)) * 2.0 / 3.0;
|
||
return ret
|
||
};
|
||
var transformlng = function transformlng(lng, lat) {
|
||
var lat = +lat;
|
||
var lng = +lng;
|
||
var ret = 300.0 + lng + 2.0 * lat + 0.1 * lng * lng + 0.1 * lng * lat + 0.1 * Math.sqrt(Math.abs(lng));
|
||
ret += (20.0 * Math.sin(6.0 * lng * PI) + 20.0 * Math.sin(2.0 * lng * PI)) * 2.0 / 3.0;
|
||
ret += (20.0 * Math.sin(lng * PI) + 40.0 * Math.sin(lng / 3.0 * PI)) * 2.0 / 3.0;
|
||
ret += (150.0 * Math.sin(lng / 12.0 * PI) + 300.0 * Math.sin(lng / 30.0 * PI)) * 2.0 / 3.0;
|
||
return ret
|
||
};
|
||
/**
|
||
* 判断是否在国内，不在国内则不做偏移
|
||
* @param lng
|
||
* @param lat
|
||
* @returns {boolean}
|
||
*/
|
||
var out_of_china = function out_of_china(lng, lat) {
|
||
var lat = +lat;
|
||
var lng = +lng;
|
||
// 纬度3.86~53.55,经度73.66~135.05
|
||
return !(lng > 73.66 && lng < 135.05 && lat > 3.86 && lat < 53.55);
|
||
};
|
||
|
||
|
||
|
||
|
||
// 其它方法
|
||
|
||
function calcAngle(p1, p2) {
|
||
// angle in radians
|
||
Math.atan2(p2[1] - p1[1], p2[0] - p1[0]);
|
||
// angle in degrees
|
||
var angleDeg = Math.atan2(p2[1] - p1[1], p2[0] - p1[0]) * 180 / Math.PI;
|
||
return angleDeg;
|
||
}
|
||
|
||
/**
|
||
* 事件总线
|
||
*
|
||
* 使用方法:
|
||
* 1. 引入组件类
|
||
* import EventBus from './EventBus'
|
||
* 2. 事件输出与订阅
|
||
* 输出：EventBus.emit('ww.myevent','nihao1')
|
||
*
|
||
* 订阅：EventBus.addEventListener('ww.myevent', (data) => {
|
||
* name = data;
|
||
* })
|
||
*
|
||
*/
|
||
class EventDispatcer {
|
||
constructor () {
|
||
// if (window && window.EventBus) {
|
||
// throw new Error('这是一个单例！')
|
||
// }
|
||
this.eventMap = new Map();
|
||
}
|
||
emit (evt,data) {
|
||
const event = new Event(evt);
|
||
let evtSet = this.eventMap.get(event.type);
|
||
if (evtSet) {
|
||
for (let item of evtSet.values()) {
|
||
item(data);
|
||
}
|
||
}
|
||
}
|
||
addEventListener (eventType, func) {
|
||
let evtSet = this.eventMap.get(eventType);
|
||
if (!evtSet) {
|
||
evtSet = new Set();
|
||
this.eventMap.set(eventType, evtSet);
|
||
}
|
||
evtSet.add(func);
|
||
}
|
||
removeEventListener (eventType, func) {
|
||
let evtSet = this.eventMap.get(eventType);
|
||
if (evtSet) {
|
||
evtSet.delete(func);
|
||
}
|
||
}
|
||
}
|
||
const bus = new EventDispatcer();
|
||
|
||
var main = {
|
||
debounce,
|
||
throttle,
|
||
transformJson,
|
||
getExt,
|
||
copyToBoard,
|
||
sleep,
|
||
uuid,
|
||
cutNumber,
|
||
getFormData,
|
||
getQueryValue,
|
||
isFullscreenEnabled,
|
||
objExtension,
|
||
getRequest,
|
||
screenfull,
|
||
loadScript,
|
||
loadScriptString,
|
||
loadScriptCallback,
|
||
loadStyles,
|
||
loadStyleString,
|
||
bd09togcj02,
|
||
gcj02tobd09,
|
||
gcj02towgs84,
|
||
wgs84togcj02,
|
||
calcAngle,
|
||
bus
|
||
};
|
||
|
||
export { bd09togcj02, bus, calcAngle, copyToBoard, cutNumber, debounce, main as default, gcj02tobd09, gcj02towgs84, getExt, getFormData, getQueryValue, getRequest, isFullscreenEnabled, loadScript, loadScriptCallback, loadScriptString, loadStyleString, loadStyles, objExtension, screenfull, sleep, throttle, transformJson, uuid, wgs84togcj02 };
|