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/*
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* 参数说明：
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* number：要格式化的数字
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* decimals：保留几位小数
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* roundtag:舍入参数，默认 ‘ceil‘ 向上取,‘floor‘向下取,‘round‘ 四舍五入
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* */
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function numberFormat(obj, decimals) {
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var number = obj.value;
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number = (number + "").replace(/[^0-9+-Ee.]/g, "");
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number = number.replace(/,/g, "");
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var roundtag = "round"; // 四舍五入
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var n = !isFinite(+number) ? 0 : +number;
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var prec = !isFinite(+decimals) ? 0 : Math.abs(decimals);
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var sep = ","; //千分位符号
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var dec = "."; //小数点符号
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var s = "";
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var toFixedFix = function (n, prec) {
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var k = Math.pow(10, prec);
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console.log();
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return "" + parseFloat(Math[roundtag](parseFloat((n * k).toFixed(prec * 2))).toFixed(prec * 2)) / k
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}
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s = (prec ? toFixedFix(n, prec) : "" + Math.round(n)).split(".");
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var re = /(-?\d+)(\d{3})/;
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while (re.test(s[0])) {
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s[0] = s[0].replace(re, "$1" + sep + "$2");
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}
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if ((s[1] || "").length < prec) {
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s[1] = s[1] || "";
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s[1] += new Array(prec - s[1].length + 1).join("0");
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}
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obj.value = s.join(dec);//给原input框重新赋值
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}
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function endWith(str, s) {
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if (s == null || s == "" || str.length == 0 || s.length > str.length)
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return false;
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if (str.substring(str.length - s.length) == s)
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return true;
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else
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return false;
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}
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function startWith(str, s) {
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if (s == null || s == "" || str.length == 0 || s.length > str.length)
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return false;
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if (str.substr(0, s.length) == s)
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return true;
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else
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return false;
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}
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function replaceAll(s1, s2, s3) {
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return s1.replace(new RegExp(s2, 'gm'), s3);
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}
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/**
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* AtPara=@key1=value1@key2=valu2...@keyN=valueN
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*/
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function GetAtPara(atPara, key) {
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if (typeof atPara != "string" || typeof key == "undefined" || key == "") {
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return undefined;
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}
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var reg = new RegExp("(^|@)" + key + "=([^@]*)(@|$)");
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var results = atPara.match(reg);
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if (results != null) {
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return unescape(results[2]);
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}
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return undefined;
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}
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/**
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* 输入验证firfox, ff浏览器不支持execCommand()
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*/
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function isFF() {
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return navigator.userAgent.indexOf("Firefox") > 0;
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}
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function valitationBefore(o, validateType) {
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if (isFF()) {
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var value = o.value;
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var flag = false;
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switch (validateType) {
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case "int" :
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flag = (!isNaN(value) && value % 1 === 0);
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break;
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case "float" :
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case "money":
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if (value.indexOf("-")===0 && value.length===1)
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break;
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flag = !isNaN(value);
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break;
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}
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if (flag)
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return;
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}
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}
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var idx = 0;
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var oldCount = 0;
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function valitationAfter(o, validateType) {
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idx = getCursortPosition(o);
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oldCount = getStrCount(o.value.toString().substr(0, idx), ',');
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var value = o.value;
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if (isFF()) {
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var flag = false;
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switch (validateType) {
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case "int":
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flag = (!isNaN(value) && value % 1 === 0);
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break;
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case "float":
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case "money":
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if (value.indexOf("-") == 0 && value.length == 1)
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break;
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else {
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flag = !isNaN(value);
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break;
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}
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}
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if (!flag) {
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o.value = '';
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}
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}
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}
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function addplaceholder(obj, bit) {
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if (obj.value == "") {
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switch (bit) {
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case 0:
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obj.value = '0';
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break;
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default:
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obj.value = '0.00';
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}
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}
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}
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/**
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* 输入验证firfox, ff浏览器不支持execCommand()
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*/
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function limitLength(obj, length) {
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obj.value = obj.value.replace(/[^\d,.-]/g, ""); //清除“数字”和“.”以外的字符 ;
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if (length != null && length != "" && length != "undefined") {
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if (obj.value.indexOf('.')>=0 && obj.value.split('.')[1].length > length) {
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obj.value = obj.value.substring(0, obj.value.length - 1);
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//obj.focus();
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}
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}
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}
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//类型为Money时输入设置
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function clearNoNum(obj){
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//修复第一个字符是小数点 的情况.
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if(obj.value !=''&& obj.value.substr(0,1) == '.'){
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obj.value=0+obj.value;
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}
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if (obj.value == "")
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obj.value = 0.00;
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if (!/\./.test(obj.value)) //为整数字符串在末尾添加.00
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obj.value += '.00';
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obj.value = obj.value.replace(/^0*(0\.|[1-9])/, '$1');//解决 粘贴不生效
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obj.value = obj.value.replace(/[^\d.]/g,""); //清除“数字”和“.”以外的字符
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obj.value = obj.value.replace(/\.{2,}/g,"."); //只保留第一个. 清除多余的
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obj.value = obj.value.replace(".","$#$").replace(/\./g,"").replace("$#$",".");
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obj.value = obj.value.replace(/^(-)*(\d+)\.(\d\d).*$/,'$1$2.$3');//只能输入两个小数
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if(obj.value.indexOf(".")< 0 && obj.value !=""){//以上已经过滤，此处控制的是如果没有小数点，首位不能为类似于 01、02的金额
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if(obj.value.substr(0,1) == '0' && obj.value.length == 2){
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obj.value= obj.value.substr(1,obj.value.length);
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}
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}
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}
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//设置光标位置
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function setCaretPosition(ctrl, pos) {
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if (ctrl.setSelectionRange) {
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ctrl.focus();
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ctrl.setSelectionRange(pos, pos);
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}
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else if (ctrl.createTextRange) {
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var range = ctrl.createTextRange();
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range.collapse(false);
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range.moveEnd('character', pos);
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range.moveStart('character', pos);
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range.select();
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}
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}
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// 获取光标位置
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function getCursortPosition(ctrl) {
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var CaretPos = 0; // IE Support
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if (document.selection) {
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ctrl.focus();
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var Sel = document.selection.createRange();
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Sel.moveStart('character', -ctrl.value.length);
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CaretPos = Sel.text.length;
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}
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// Firefox support
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else if (ctrl.selectionStart || ctrl.selectionStart == '0')
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CaretPos = ctrl.selectionStart;
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return (CaretPos);
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}
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function FormatMoney(obj, precision, separator) {
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//获取之前的，
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var oldV = obj.value;
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if (precision == undefined || precision == null || precision == "")
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precision = 2;
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if (precision != 2)
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return;
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oldV = oldV.replace(/[^\d.-]/g, "");
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var val = formatNumber(oldV, precision, separator);
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if (isNaN(val)==false )
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obj.value = val;
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var didx = getStrCount(val.toString().substr(0, idx),',');
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if (didx > oldCount && didx > 0)
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idx = idx +1;
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setCaretPosition(obj,idx);
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}
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//统计字符串中特定字符串的个数
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function getStrCount(scrstr,armstr){
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//scrstr 源字符串 armstr 特殊字符
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var count=0;
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while(scrstr.indexOf(armstr) >=1 )
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{
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scrstr = scrstr.replace(armstr,"");
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count++;
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}
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return count;
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}
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/**
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* 将数值格式化成金额形式
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*
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* @param num 数值(Number或者String)
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* @param precision 精度，默认不变
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* @param separator 分隔符，默认为逗号
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* @return 金额格式的字符串,如'1,234,567'，默认返回NaN
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* @type String
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*/
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function formatNumber(num, precision, separator) {
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if (precision != 2)
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return num;
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var parts;
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// 判断是否为数字
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if (!isNaN(parseFloat(num)) && isFinite(num)) {
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// 把类似 .5, 5. 之类的数据转化成0.5, 5, 为数据精度处理做准, 至于为什么
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// 不在判断中直接写 if (!isNaN(num = parseFloat(num)) && isFinite(num))
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// 是因为parseFloat有一个奇怪的精度问题, 比如 parseFloat(12312312.1234567119)
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// 的值变成了 12312312.123456713
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num = Number(num);
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// 处理小数点位数
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num = (typeof precision !== 'undefined' ? (Math.round(num * Math.pow(10, precision)) / Math.pow(10, precision)).toFixed(precision) : num).toString();
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// 分离数字的小数部分和整数部分
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parts = num.split('.');
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// 整数部分加[separator]分隔, 借用一个著名的正则表达式
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parts[0] = parts[0].toString().replace(/(\d)(?=(\d{3})+(?!\d))/g, '$1' + (separator || ','));
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return parts.join('.');
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}
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return 0;
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}
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/* 文本框根据输入内容自适应高度
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* @param {HTMLElement} 输入框元素
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* @param {Number} 设置光标与输入框保持的距离(默认0)
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* @param {Number} 设置最大高度(可选)
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*/
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var autoTextarea = function (elem, extra, maxHeight) {
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extra = extra || 0;
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var isFirefox = !!document.getBoxObjectFor || 'mozInnerScreenX' in window,
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isOpera = !!window.opera && !!window.opera.toString().indexOf('Opera'),
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addEvent = function (type, callback) {
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elem.addEventListener ?
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elem.addEventListener(type, callback, false) :
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elem.attachEvent('on' + type, callback);
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},
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getStyle = elem.currentStyle ? function (name) {
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var val = elem.currentStyle[name];
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if (name === 'height' && val.search(/px/i) !== 1) {
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var rect = elem.getBoundingClientRect();
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return rect.bottom - rect.top -
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parseFloat(getStyle('paddingTop')) -
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parseFloat(getStyle('paddingBottom')) + 'px';
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}
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return val;
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} : function (name) {
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return getComputedStyle(elem, null)[name];
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},
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minHeight = parseFloat(getStyle('height'));
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elem.style.resize = 'none';
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var change = function () {
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var scrollTop, height,
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padding = 0,
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style = elem.style;
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if (elem._length === elem.value.length) return;
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elem._length = elem.value.length;
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if (!isFirefox && !isOpera) {
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padding = parseInt(getStyle('paddingTop')) + parseInt(getStyle('paddingBottom'));
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}
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scrollTop = document.body.scrollTop || document.documentElement.scrollTop;
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elem.style.height = minHeight + 'px';
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if (elem.scrollHeight > minHeight) {
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if (maxHeight && elem.scrollHeight > maxHeight) {
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height = maxHeight - padding+10;
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style.overflowY = 'auto';
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} else {
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height = elem.scrollHeight - padding+10;
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style.overflowY = 'hidden';
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}
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style.height = height + extra + 'px';
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scrollTop += parseInt(style.height) - elem.currHeight;
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document.body.scrollTop = scrollTop;
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document.documentElement.scrollTop = scrollTop;
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elem.currHeight = parseInt(style.height);
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}
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}
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addEvent('propertychange', change);
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addEvent('input', change);
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addEvent('focus', change);
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change();
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};
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export{
|
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numberFormat,
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endWith,
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startWith,
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replaceAll,
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GetAtPara,
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valitationBefore,
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|
valitationAfter,
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addplaceholder,
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clearNoNum,
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FormatMoney,
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limitLength,
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autoTextarea,
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formatNumber
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|
|
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}
|
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