【留言板】可编辑输入框操作总结

var FaceWrap = function(head, cont, opts){
    this.$head = head;
    this.$cont = cont;
    this.data = ['one', 'two', 'thr'];
    var self = this;
    var toggle = false;
    this.onClickHandHandle = function(evt){
        if(!toggle){
            self.$cont.style.display = 'block';
            toggle = true;
        }else{
            self.$cont.style.display = 'none';
            toggle = false;
        }
        if(opts.onClickHandHandle){
            opts.onClickHandHandle(toggle);
        }
    }
    this.onChooseImg = opts. onChooseImg || function(){}
    this.generalFaceImg();
    this.bind();
}
var facePt = FaceWrap.prototype;
facePt.generalFaceImg = function(){
    var fragment = document.createDocumentFragment();
    for( var index =0; index < this.data.length; ++index){
        var data = this.data[index];
        var img = document.createElement('img');
        img.setAttribute('src', '../img/face/' + data + '.jpg');
        img.setAttribute('data-id', data);
        img.setAttribute('class','face-img');
        fragment.appendChild(img);
    }
    this.$cont.appendChild(fragment);
}
facePt.bind = function(){  
    if(document.attachEvent){
        this.$head.attachEvent('onclick',this.onClickHandHandle);
        this.$cont.attachEvent('onclick',this.onChooseImg);
    }else{       
        this.$head.addEventListener('click',this.onClickHandHandle);
        this.$cont.addEventListener('click',this.onChooseImg);
    }
}
facePt.hide = function(){
    this.onClickHandHandle();
}

var SelectionUitls = function(dom){
    this.dom = dom;
    this.cursorIndex;
}
var pt = SelectionUitls.prototype;
pt.insertDomForStandard = function(dom){
    var sel = window.getSelection(); //获取选区集合
    var range = sel.getRangeAt(0); //获取第一个选择
    range.deleteContents(); //删除选区选重的元素
    range.insertNode(dom); //插入元素在选区的首位置
    range = range.cloneRange(); //克隆一个选区
    range.setStartAfter(dom); //设置选区起点光标位置在指定元素的后面
    range.collapse(true);//合并起点、终点光标
    sel.removeAllRanges();//移除所有选区
    sel.addRange(range); //添加一个选区
}
pt.insertDomForIe = function(dom){
    this.dom.focus();
    var wrap = document.createElement('div');
    wrap.appendChild(dom);

    document.selection.createRange().pasteHTML(wrap.innerHTML);
}
pt.insertDom = function(dom){
    //光标处插入非元素
    if(window.getSelection){
        this.insertDomForStandard(dom);
    }else{
        this.insertDomForIe(dom);
    }
}
pt.getContent = function(){
    //获取数据
    var nodes = this.dom.childNodes;
    var datas = [];
    for(var index = 0; index < nodes.length; index ++){
        var node = nodes[index];
        if(node.nodeType == 3){
            datas.push(node.textContent || node.nodeValue || node.data);
        }else{
            datas.push(node.getAttribute('data-id'));
        }
    }
    return datas.join('##');
}

var LeaveMsg = function(opts){
    this.opts = opts;
    this.createFaceWrap();
    this.createUitls();
    this.curLocation;
}
var leaveMsgPt = LeaveMsg.prototype;
leaveMsgPt._insertFace = function(id){
    var img = document.createElement('img');
    img.setAttribute('class','face-img');
    img.setAttribute('data-id', id);
    img.src= '../img/face/' + id + '.jpg';
    this.selectionUitls.insertDom(img);
    this.faceWrap.hide();
}
leaveMsgPt.createFaceWrap = function(){
    var self = this;
    var faceOpt = {
        onChooseImg:function(evt){
            //插入表情，获取位置，获取表情，插入表情
            var id = (evt.target||evt.srcElement).getAttribute('data-id');
            self._insertFace(id);
        }
    }
    this.faceWrap = new FaceWrap(this.opts.faceHead, this.opts.faceCont, faceOpt);
}
leaveMsgPt.createUitls = function(){
    this.selectionUitls = new SelectionUitls(this.opts.area);
}
leaveMsgPt.getContent = function(evt){
    this.selectionUitls.getContent();
}

var leaveMsgArea = document.getElementById('leaveMsgArea');
var faceHead = document.getElementById('head');
var faceCont = document.getElementById('cont');


var leaveMsg = new LeaveMsg({
    area: leaveMsgArea,
    faceHead: faceHead,
    faceCont: faceCont
});

<div class="leaveMsgArea" contenteditable="true" id="leaveMsgArea">
</div>
<div class="face-wrap">
    <a class="face-head" id="head" href="javascript:void(0)">表情</a>
    <div class="face-cont" id="cont">

    </div>
</div>
<div class="button-group">
    <button type="button" onclick="leaveMsg.getContent(event)" >获取内容</button>
</div>