兼容主流浏览器的【表情插入】源码(转）

来源：互联网发布：淘宝卖家能删除差评吗编辑：程序博客网时间：2024/06/06 03:57

<!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>