ahjesus 获取div编辑框,textarea,input text的光标位置 兼容IE,FF和Chrome

ahjesus 返回光标位置兼容IE,FF和Chrome,

说明更新(2013-04-24){

今天收到反馈说这个例子没作用了,经过查证测试发现是因为使用的jquery的版本过高引起的

$(element).attr("tagName") 这个是非官方的用法 所以版本变化会有影响 如果要使用更高版本jquery,获取tagName改成原生就可以了

或者调整其他获取tagName的方式

}

网上苦找2小时,全是不能兼容FF的,看来这种东西网上是搞不到现成的了,只能自己动手丰衣足食

现在发布出来,今后网上就有现成的供人使用了。

为了省事,少量位置用了jquery 改原生JS也很方便,谁需要就请自己修改了。

欢迎各位路过高人拍板,欢迎各位留言提供改进代码。

又改进 兼容了Chrome 下面的代码已修改成最新版

上源码了

 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

    <title>js获取div编辑框,textarea,input text的光标位置,兼容FF和IE</title>

    <script src="jquery-1.4.4.js" type="text/javascript"></script>

    <script type="text/javascript">

        //去除左右所有空格

        String.prototype.trim = function () {

            return this.replace(/(^\s*)|(\s*$)/g, "");

        }

        function getPosition(element) {

            var OsObject = "";

            if (navigator.userAgent.indexOf("MSIE") > 0) {

                OsObject = "MSIE";

            }

            if (navigator.userAgent.indexOf("Firefox") > 0) {

                OsObject = "Firefox";

            }

            if (navigator.userAgent.indexOf("Safari") > 0) {

                OsObject = "Safari";

            }

            if (navigator.userAgent.indexOf("Camino") > 0) {

                OsObject = "Camino";

            }

            if (navigator.userAgent.indexOf("Gecko") > 0) {

                OsObject = "Gecko";

            }

            if (navigator.userAgent.indexOf("Chrome") > 0) {

                OsObject = "Chrome";

            } 

            

            var result = 0;

            if (!document.selection) { //非IE浏览器

                var thisTagName = null;

                if ($(element).attr("tagName") != "TEXTAREA" && $(element).attr("tagName") != "INPUT") {

                    if ($(element).attr("tagName") == "DIV" && $(element).attr("contenteditable") == "true") {

                        thisTagName = window.getSelection().anchorNode.parentElement.tagName;                        

                    } //出自http://www.cnblogs.com/ahjesus 尊重作者辛苦劳动成果,转载请注明出处,谢谢!

                    else {

                        thisTagName == null;

                    }

                }

                else {                    

                    if ($(element).attr("tagName") == "INPUT" && $(element).attr("type") == "text") {

                        thisTagName = window.getSelection().anchorNode.tagName;

                    }

                    else {

                        console.log(window.getSelection());                     

                        thisTagName = window.getSelection().anchorNode.tagName;

                    }

                }

                console.log(thisTagName);

                if (thisTagName == "TEXTAREA" || thisTagName == "INPUT" || (thisTagName=="BODY"&&OsObject == "Chrome")) {

                    result = element.selectionStart

                } //出自http://www.cnblogs.com/ahjesus 尊重作者辛苦劳动成果,转载请注明出处,谢谢!                

                else if (thisTagName != null) {

                    if (thisTagName == element.tagName) {

                        if (window.getSelection().anchorNode.textContent == $(element).text()) {

                            result = window.getSelection().anchorOffset;

                        }

                        else {

                            var currentIndex = window.getSelection().anchorOffset;

                            var txt = "";

                            var txtoo = window.getSelection().anchorNode.previousSibling;

                            while (txtoo != null) {

                                txt += txtoo.textContent;

                                txtoo = txtoo.previousSibling;

                            } //出自http://www.cnblogs.com/ahjesus 尊重作者辛苦劳动成果,转载请注明出处,谢谢!

                            result = txt.length + currentIndex;

                        }

                    }

                    else {

                        var currentIndex = window.getSelection().anchorOffset;

                        var txt = "";

                        var txtoo = window.getSelection().anchorNode.parentElement.previousSibling;

                        while (txtoo != null) {

                            txt += txtoo.textContent;

                            txtoo = txtoo.previousSibling;

                        }

                        result = txt.length + currentIndex;

                    }

                } //出自http://www.cnblogs.com/ahjesus 尊重作者辛苦劳动成果,转载请注明出处,谢谢!

                else {

                    return 0;

                }

            } else { //IE

                var rng;

                if ($(element).attr("tagName") == "TEXTAREA" || ($(element).attr("tagName") == "INPUT" && $(element).attr("type") == "text") || ($(element).attr("tagName") == "DIV" && $(element).attr("contenteditable") == "true")) {

                    element.focus();

                    rng = document.selection.createRange();

                    rng.moveStart('character', -element.innerText.length);

                    var text = rng.text;

                    for (var i = 0; i < element.innerText.length; i++) {

                        if (element.innerText.substring(0, i + 1) == text.substring(text.length - i - 1, text.length)) {

                            result = i + 1;

                        }

                    }

                } //出自http://www.cnblogs.com/ahjesus 尊重作者辛苦劳动成果,转载请注明出处,谢谢!

                else {

                    return 0;

                }

            }

            return result;

        }



        function getValue(element) {

            var pos = getPosition(element);

            document.getElementById("pnum").value = pos;

        }



    </script>

    <style type="text/css">

        #Div1, #Div2

        {

            width: 500px;

            height: 100px;

            border: solid 1px black;

        }

    </style>

</head>

<body>

    <input id="pnum" type="text" value="Hello,wellcome to test! 你好,欢迎测试!" onmouseup="getValue(this)"

        style="display: block" />

    <textarea cols="60" rows="10" onkeyup="getValue(this)" onmouseup="getValue(this)">Hello,wellcome to test! 你好,欢迎测试! 注意源代码开闭合标记之间不能换行,否则统计错误!</textarea>

    <div id="Div1" onclick="getValue(this);" onkeyup="getValue(this);" contenteditable="true">一二三<span>四五</span>六七八<span>九零</span> 注意源代码开闭合标记之间不能换行,否则统计错误!注意div编辑框源码里面是嵌套有其他标签的,可以正常返回正确位置!</div>

    <br />

    <div id="Div2" onclick="getValue(this);" onkeyup="getValue(this);">一二三四五六<span>七八</span></div>

</body>

</html>

 

 

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