兼容主流浏览器的【表情插入】源码

作者：meteoric_cry 来源：51js 时间：2010-07-02 13:02:00　

有空余的时候自己写了一下，代码没有进行很好的规整。如果发现bug请及时通告我，谢谢

主要功能：
1、点击插入表情，可选择表情进行插入（是UBB代码）图片直接用了新浪微博的
2、每次操作完成后，光标移到文本夫域的最后
3、当显示表情时，点击网页空白处隐藏表情面板

直接上代码了：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>UBB表情的插入</title><style type="text/css"> * {margin:0; padding:0;} body {font:12px/1.3 Arial, Helvetica, sans-serif; background-color:#FFFFFF;} ul, li {list-style:none} img {border:none} .container {margin:30px;} #txtDemo {width:475px; height:110px; word-break:break-all; word-wrap:break-word;} #facePanel {border-width:1px 2px 2px 1px; border-color: #CCCCCC; border-style:solid; -webkit-border-radius: 6px; -moz-border-radius:6px; padding:6px; width:330px; margin-top:5px; display:none;} #facePanel li{float:left; width:28px; height:28px; padding:0 5px 5px 0;} #facePanel li a {display:block; text-decoration:none; border:1px dashed #DDD; width:26px; height:26px; line-height:26px; overflow:hidden; text-align:center;} #facePanel li a:hover {border-color:#999;} #facePanel li a span {display:inline-block;} #facePanel li a img {vertical-align:middle;} #facePanel ul {zoom:1;} #facePanel ul:after{ content:"\0020"; display:block; height:0; line-height:0; clear:both; visibility:hidden;}</style></head><body> <div class="container"> <div> <textarea id="txtDemo"></textarea> </div> <button onclick="showFace(event);">插入表情</button> <div id="facePanel">sadf</div></div><script type="text/javascript"> function $(id) { return typeof id === 'string' ? document.getElementById(id) : id; } function addEvent(el, type, handler) { if(el.attachEvent) { el.attachEvent("on" + type, handler); } else if(el.addEventListener) { el.addEventListener(type, handler, false); } } function removeEvent(el, type, handler) { if(el.detachEvent) { el.detachEvent('on' + type, handler); } else if(el.removeEventListener) { el.removeEventListener(type, handler, false); } } var faceInited = false; //显示表情 function showFace(ev) { if(!faceInited) { initFace(); } var facePanel= $("facePanel"); facePanel.style.display = "block"; addEvent(document.body, 'click', hideFace); addEvent(facePanel, 'click', cancelEventBubble); cancelEventBubble(ev); } //隐藏表情 function hideFace() { $("facePanel").style.display = "none"; removeEvent(document.body, 'click', hideFace); removeEvent($("facePanel"), 'click', cancelEventBubble); } //插入表情 function insertFace(elem) { var txtElem = $("txtDemo"), range = txtElem.getAttribute("range") ? txtElem.getAttribute("range").split("|") : [0, 0]; var str_1 = txtElem.value.slice(0, range[0]); var str_2 = txtElem.value.slice(range[1]); txtElem.value = str_1 + elem.getAttribute("value") + str_2; if(!document.selection) { txtElem.selectionStart = txtElem.value.length; txtElem.selectionEnd = txtElem.value.length; } else { var range = txtElem.createTextRange(); range.collapse(1); range.moveStart("character", txtElem.value.length); range.moveEnd("character", txtElem.value.length); range.select(); } txtElem.focus(); hideFace(); } //取消事件冒泡 function cancelEventBubble(ev) { ev = ev || window.event; if(ev.stopPropagation) { ev.stopPropagation(); } else if(!ev.cancelBubble) { ev.cancelBubble = true; } } //记录textarea的选区的start&end function savePos() { var elem = $("txtDemo"), range = getRange(elem);//获取选区 elem.setAttribute("range", range.join("|")); document.title = "start:" + range[0] + "--" + "end:" + range[1]; cancelEventBubble(arguments[0] || window.event); } !(function() { var txtElem = $("txtDemo"); addEvent(txtElem, 'focus', savePos); addEvent(txtElem, 'mouseup', savePos); addEvent(txtElem, 'keyup', savePos); addEvent(txtElem, 'mousemove', savePos);//Chrome 在选中文本域内的文字时，不能触发mouseup事件，导致range依旧为最近一次的range })(); //初始化表情 function initFace() { var faces = [{"icon":"\u8db3\u7403","value":"[\u8db3\u7403]","src":"basic\/football.gif"},{"icon":"\u54e8\u5b50","value":"[\u54e8\u5b50]","src":"basic\/shao.gif"},{"icon":"\u7ea2\u724c","value":"[\u7ea2\u724c]","src":"basic\/redcard.gif"},{"icon":"\u9ec4\u724c","value":"[\u9ec4\u724c]","src":"basic\/yellowcard.gif"},{"icon":"\u54c8\u54c8","value":"[\u54c8\u54c8]","src":"basic\/laugh.gif"},{"icon":"\u5475\u5475","value":"[\u5475\u5475]","src":"basic\/smile.gif"},{"icon":"\u6cea","value":"[\u6cea]","src":"basic\/cry.gif"},{"icon":"\u6c57","value":"[\u6c57]","src":"basic\/sweat.gif"},{"icon":"\u7231\u4f60","value":"[\u7231\u4f60]","src":"basic\/love.gif"},{"icon":"\u563b\u563b","value":"[\u563b\u563b]","src":"basic\/tooth.gif"},{"icon":"\u54fc","value":"[\u54fc]","src":"basic\/hate.gif"},{"icon":"\u5fc3","value":"[\u5fc3]","src":"basic\/heart.gif"},{"icon":"\u6655","value":"[\u6655]","src":"basic\/dizzy.gif"},{"icon":"\u6012","value":"[\u6012]","src":"basic\/angry.gif"},{"icon":"\u86cb\u7cd5","value":"[\u86cb\u7cd5]","src":"basic\/cake.gif"},{"icon":"\u82b1","value":"[\u82b1]","src":"basic\/flower.gif"},{"icon":"\u6293\u72c2","value":"[\u6293\u72c2]","src":"basic\/crazy.gif"},{"icon":"\u56f0","value":"[\u56f0]","src":"basic\/sleepy.gif"},{"icon":"\u5e72\u676f","value":"[\u5e72\u676f]","src":"basic\/cheer.gif"},{"icon":"\u592a\u9633","value":"[\u592a\u9633]","src":"basic\/sun.gif"},{"icon":"\u4e0b\u96e8","value":"[\u4e0b\u96e8]","src":"basic\/rain.gif"},{"icon":"\u4f24\u5fc3","value":"[\u4f24\u5fc3]","src":"basic\/sad.gif"},{"icon":"\u6708\u4eae","value":"[\u6708\u4eae]","src":"basic\/moon.gif"},{"icon":"\u732a\u5934","value":"[\u732a\u5934]","src":"basic\/pig.gif"},{"icon":"\u8721\u70db","value":"[\u8721\u70db]","src":"basic\/candle.gif"}]; var imgURI = "http://timg.sjs.sinajs.cn/miniblog2style/images/common/face/"; var tempArr = []; tempArr.push('<ul>'); for(var i=0, len = faces.length; i<len; i++) { tempArr.push([ '<li><a href="javascript:;" hideFocus="true" onclick="insertFace(this);return false;" value="' + faces[i].value + '" title="' + faces[i].icon + '"><img src="' + imgURI + faces[i].src + '" alt="' + faces[i].icon + '" /><span> </span></a></li>', ].join("")); } tempArr.push('</ul>'); $("facePanel").innerHTML = tempArr.join(""); } //获取选区 function getRange(elem) { var start = 0, end = 0; if(!document.selection) { start = elem.selectionStart; end = elem.selectionEnd; } else if(document.selection) { var range = document.selection.createRange(), range_all = document.body.createTextRange(), i = 0; range_all.moveToElementText(elem); for(; range_all.compareEndPoints("StartToStart", range) < 0; start++) { range_all.moveStart('character', 1); } for(; i<start; i++) { if(elem.value.charAt(i) == "\n") { start++; } } range_all = document.body.createTextRange(); range_all.moveToElementText(elem); for(; range_all.compareEndPoints('StartToEnd', range) < 0; end++) { range_all.moveStart('character', 1); } for(i=0; i <= end; i++) { if(elem.value.charAt(i) == "\n") { end++; } } } return [start, end]; }</script></body></html>

思路相对比较简单：监听文本域的一些事件，获取当前的选区start与end位置；然后赋给它的一个自定义属性；这样就相当于保存了它的选区了

需要插入内容时，它的值 = elem.value.slice(0, start) + "需要插入的内容" + elem.value.slice(end) ;
然后将文本域的选区移到最后，再让其获得焦点就可以了

显示表情面板时，监听document.body的click事件，一旦触发则隐藏面板
监控面板的click

标签：表情,浏览器,兼容

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