通过如何通过js实现复制粘贴功能

来源：互联网发布：js 修改input type 编辑：程序博客网时间：2024/05/16 11:43

在ie中window.clipboardData（剪切板对象）是可以被获取，所以利用这个方法我们可以实现在IE当中复制粘贴的功能，demo如下！

<html>   <head><meta http-equiv="Content-Type" content="text/html; charset=utf-8">   <title>clipboard</title>   <SCRIPT language=JavaScript>   function copy()   {     var obj=document.getElementById("txarea");     window.clipboardData.setData("Text",obj.value);//设置数据    alert("复制成功");}   function paste() {     var obj=document.getElementById("txarea");     var clipboard = window.clipboardData.getData('Text');     clipboard == null ? alert('no data') : obj.value = clipboard;   }   </SCRIPT>   <INPUT name=Button onClick="txarea.value=''" type=button value='clear'>   <INPUT name=Button onClick="copy('textarea')" type=button value='copy'>   <INPUT name=Button onClick="paste('textarea')"; type=button value='paste'><br>   <textarea name="txarea" id="txarea" cols="105" rows="11" class="transform"></textarea></p>   </body>   </html>

上述代码在IE中访问是可以实现复制粘贴的！但是其他浏览器并不被支持！于是找了下资料，由于现在浏览器种类也越来越多，诸如 IE、Firefox、Chrome、Safari等等，因此现在要实现一个js复制内容到剪贴板的小功能就不是一件那么容易的事了。在FLASH 9 时代，有一个通杀所有浏览器的js复制内容到剪贴板的方案：这个方案是一个最流行的方法: 著名的Clipboard Copy解决方案利用一个clipboard.swf作为桥梁，复制内容到剪贴板。原理是：创建一个隐藏的flash文件，同时给给flash的变量FlashVars 赋“clipboard=..”，通过这个赋值flash就会把复制的内容放到剪贴板。这个方法兼容IE、Firefox、Opera、chrome、 Safari，真可谓“万能”的解决方案。浏览器Flash的安装率非常高，这几乎是一个完美的解决方案。

demo如下所示：

<!DOCTYPE HTML><html lang="en"><head>    <meta charset="utf-8"/>    <meta name="copyright" content=""/>    <title>复制粘贴</title>    <body>       <div class="one">        <input type="text" class="gift_num fl" value="XXXXXXXXXXXXXXXXXXXXXX" disabled="disabled" readonly="true"/>        <a href="javascript:;" hidefocus="none" class="btn_copy block fl" id="btnCopy">复制</a>           </div>    </body></html><script type="text/javascript" src="jquery.min.js"></script><script type="text/javascript" src="ZeroClipboard.js"></script><script type="text/javascript">//这里的参数说明一下，text是要复制的文本内容，button是点击触发复制的dom对象,msg是复制成功后的提示信息，parent是包含flash的父元素function clipboard(text, button, msg, parent) {    if (window.clipboardData) {//如果是IE浏览器        var copyBtn = document.getElementById(button);        copyBtn.onclick = function() {            window.clipboardData.setData('text', text);            alert(msg);        }    } else {//非IE浏览器        var clip = new ZeroClipboard.Client();//初始化一个剪切板对象        clip.setHandCursor(true);//设置手型游标        clip.setText(text);//设置待复制的文本内容        clip.addEventListener("mouseUp", function(client) {//绑定mouseUp事件触发复制            alert(msg);        });        clip.glue(button,parent);//调用ZeroClipboard.js的内置方法处理flash的位置的问题    }    return false;}$(function(){    clipboard($(".gift_num").val(),"btnCopy","复制成功",'btnCopy');//调用方式})</script>

针对上面的demo，我修改了下ZeroClipboard.js插件里面的代码，以便能在不确定复制按钮在什么位置的情况下可以使用！代码如下：红色是修改过的代码

var ZeroClipboard = {    version: "1.0.7",    clients: {},    moviePath: '/js/ZeroClipboard.swf',    nextId: 1,    $: function(thingy) {        if (typeof(thingy) == 'string') thingy = document.getElementById(thingy);        if (!thingy.addClass) {            thingy.hide = function() {                this.style.display = 'none';            };            thingy.show = function() {                this.style.display = '';            };            thingy.addClass = function(name) {                this.removeClass(name);                this.className += ' ' + name;            };            thingy.removeClass = function(name) {                var classes = this.className.split(/\s+/);                var idx = -1;                for (var k = 0; k < classes.length; k++) {                    if (classes[k] == name) {                        idx = k;                        k = classes.length;                    }                }                if (idx > -1) {                    classes.splice(idx, 1);                    this.className = classes.join(' ');                }                return this;            };            thingy.hasClass = function(name) {                return !!this.className.match(new RegExp("\\s*" + name + "\\s*"));            };        }        return thingy;    },    setMoviePath: function(path) {        this.moviePath = path;    },    dispatch: function(id, eventName, args) {        var client = this.clients[id];        if (client) {            client.receiveEvent(eventName, args);        }    },    register: function(id, client) {        this.clients[id] = client;    },    getDOMObjectPosition: function(obj, stopObj) {        var info = {            left: 0,            top: 0,            width: obj.width ? obj.width : obj.offsetWidth,            height: obj.height ? obj.height : obj.offsetHeight        };        while (obj && (obj != stopObj)) {            info.left += obj.offsetLeft;            info.top += obj.offsetTop;            obj = obj.offsetParent;            console.log(obj);            console.log(stopObj);        }        return info;    },    Client: function(elem) {        this.handlers = {};        this.id = ZeroClipboard.nextId++;        this.movieId = 'ZeroClipboardMovie_' + this.id;        ZeroClipboard.register(this.id, this);        if (elem) this.glue(elem);    }};ZeroClipboard.Client.prototype = {    id: 0,    ready: false,    movie: null,    clipText: '',    handCursorEnabled: true,    cssEffects: true,    handlers: null,    glue: function(elem, appendElem, stylesToAdd) {        this.domElement = ZeroClipboard.$(elem);        var zIndex = 9999;        if (this.domElement.style.zIndex) {            zIndex = parseInt(this.domElement.style.zIndex, 10) + 1;        }        if (typeof(appendElem) == 'string') {            if(!($('#'+ appendElem).css("position") == 'relative' || $('#'+ appendElem).css("position") == 'absolute')){               $('#'+ appendElem).css("position","relative");//如果指定的父元素不是相对和决定定位就设置父元素为相对定位            }            appendElem = ZeroClipboard.$(appendElem);        } else if (typeof(appendElem) == 'undefined') {            appendElem = document.getElementsByTagName('body')[0];        }        var box = ZeroClipboard.getDOMObjectPosition(this.domElement, appendElem);        this.div = document.createElement('div');        var style = this.div.style;        style.position = 'absolute';        style.left = '' + box.left + 'px';        style.top = '' + box.top + 'px';        style.width = '' + box.width + 'px';        style.height = '' + box.height + 'px';        style.zIndex = zIndex;        if (typeof(stylesToAdd) == 'object') {            for (addedStyle in stylesToAdd) {                style[addedStyle] = stylesToAdd[addedStyle];            }        }        appendElem.appendChild(this.div);        this.div.innerHTML = this.getHTML(box.width, box.height);    },    getHTML: function(width, height) {        var html = '';        var flashvars = 'id=' + this.id + '&width=' + width + '&height=' + height;        if (navigator.userAgent.match(/MSIE/)) {            var protocol = location.href.match(/^https/i) ? 'https://' : 'http://';            html += '<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="' + protocol + 'download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,0,0" width="' + width + '" height="' + height + '" id="' + this.movieId + '" align="middle"><param name="allowScriptAccess" value="always" /><param name="allowFullScreen" value="false" /><param name="movie" value="' + ZeroClipboard.moviePath + '" /><param name="loop" value="false" /><param name="menu" value="false" /><param name="quality" value="best" /><param name="bgcolor" value="#ffffff" /><param name="flashvars" value="' + flashvars + '"/><param name="wmode" value="transparent"/></object>';        } else {            html += '<embed id="' + this.movieId + '" src="' + ZeroClipboard.moviePath + '" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="' + width + '" height="' + height + '" name="' + this.movieId + '" align="middle" allowScriptAccess="always" allowFullScreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="' + flashvars + '" wmode="transparent" />';        }        return html;    },    hide: function() {        if (this.div) {            this.div.style.left = '-2000px';        }    },    show: function() {        this.reposition();    },    destroy: function() {        if (this.domElement && this.div) {            this.hide();            this.div.innerHTML = '';            var body = document.getElementsByTagName('body')[0];            try {                body.removeChild(this.div);            } catch (e) {;            }            this.domElement = null;            this.div = null;        }    },    reposition: function(elem) {        if (elem) {            this.domElement = ZeroClipboard.$(elem);            if (!this.domElement) this.hide();        }        if (this.domElement && this.div) {            var box = ZeroClipboard.getDOMObjectPosition(this.domElement);            var style = this.div.style;            style.left = '' + box.left + 'px';            style.top = '' + box.top + 'px';        }    },    setText: function(newText) {        this.clipText = newText;        if (this.ready) this.movie.setText(newText);    },    addEventListener: function(eventName, func) {        eventName = eventName.toString().toLowerCase().replace(/^on/, '');        if (!this.handlers[eventName]) this.handlers[eventName] = [];        this.handlers[eventName].push(func);    },    setHandCursor: function(enabled) {        this.handCursorEnabled = enabled;        if (this.ready) this.movie.setHandCursor(enabled);    },    setCSSEffects: function(enabled) {        this.cssEffects = !!enabled;    },    receiveEvent: function(eventName, args) {        eventName = eventName.toString().toLowerCase().replace(/^on/, '');        switch (eventName) {            case 'load':                this.movie = document.getElementById(this.movieId);                if (!this.movie) {                    var self = this;                    setTimeout(function() {                        self.receiveEvent('load', null);                    }, 1);                    return;                }                if (!this.ready && navigator.userAgent.match(/Firefox/) && navigator.userAgent.match(/Windows/)) {                    var self = this;                    setTimeout(function() {                        self.receiveEvent('load', null);                    }, 100);                    this.ready = true;                    return;                }                this.ready = true;                this.movie.setText(this.clipText);                this.movie.setHandCursor(this.handCursorEnabled);                break;            case 'mouseover':                if (this.domElement && this.cssEffects) {                    this.domElement.addClass('hover');                    if (this.recoverActive) this.domElement.addClass('active');                }                break;            case 'mouseout':                if (this.domElement && this.cssEffects) {                    this.recoverActive = false;                    if (this.domElement.hasClass('active')) {                        this.domElement.removeClass('active');                        this.recoverActive = true;                    }                    this.domElement.removeClass('hover');                }                break;            case 'mousedown':                if (this.domElement && this.cssEffects) {                    this.domElement.addClass('active');                }                break;            case 'mouseup':                if (this.domElement && this.cssEffects) {                    this.domElement.removeClass('active');                    this.recoverActive = false;                }                break;        }        if (this.handlers[eventName]) {            for (var idx = 0, len = this.handlers[eventName].length; idx < len; idx++) {                var func = this.handlers[eventName][idx];                if (typeof(func) == 'function') {                    func(this, args);                } else if ((typeof(func) == 'object') && (func.length == 2)) {                    func[0][func[1]](this, args);                } else if (typeof(func) == 'string') {                    window[func](this, args);                }            }        }    }};

说明：父元素的设置一般情况下就是点击复制的按钮，如有其它的情况下可以修改相应的代码来适合自己的需求！

上述是在前辈已经成熟的代码的基础上做了相应的修改

此方法的要在服务器环境下才可以看到效果！

阅读全文

0 0