KindEditor 添加默认提示信息

Qt中用这个编辑框可以设置提示信息并且禁用跳转链接

var editor;
var tipFlag = true;
var placeholderText = '';
KindEditor.ready(function(K) {
editor = K.create('textarea[name="detailContent"]', {
cssData : 'body {font-family:Microsoft YaHei; font-size:12px;} img{ max-width:100%;}',
fullscreenMode: true,
useContextmenu: false,
filterMode: false,
afterCreate:function(){
//阻止点击链接默认跳转操作
var self = this;
var doc = this.edit.doc;
K(doc).click(function(e) {
if (K(e.target).name === 'a') {
e.preventDefault();
}
});

//添加一个提示编辑区
var frame = this.edit;
K('<textarea class="ph ke-edit-textarea" placeholder = "" style="width: 100%; padding:5px 5px 5px 7px; background-color:transparent; position: absolute;z-index: 10;top: 0;border: 0;overflow: auto;resize: none; font-size:12px;"></textarea>').appendTo(frame.iframe[0].contentDocument.firstChild);
frame.iframe[0].contentDocument.firstChild.lastChild.style.height = "100%";
frame.iframe[0].contentDocument.firstChild.lastChild.placeholder = placeholderText;

var _ua = navigator.userAgent.toLowerCase();
var _IE = _ua.indexOf('msie') > -1 && _ua.indexOf('opera') == -1;
if(_IE)
{
//IE的事件穿透没做
}else{
//事件穿透
frame.iframe[0].contentDocument.firstChild.lastChild.style.pointerEvents = 'none';
}

//监听输入事件
K(frame.doc)[0].oninput = function(e){
if(tipFlag && editor && editor.text() != '')
{
frame.iframe[0].contentDocument.firstChild.lastChild.style.display = "none";
tipFlag = false;
}
else{
if(editor && editor.text() == '' && !tipFlag)
{
frame.iframe[0].contentDocument.firstChild.lastChild.style.display = "block";
tipFlag = true;
}
}
};
},
afterChange:function(){
if(editor)
{
var frame = this.edit;
if(editor.text() != '' && tipFlag)
{
frame.iframe[0].contentDocument.firstChild.lastChild.style.display = "none";
tipFlag = false;
}else if(editor.text() == ''&& !tipFlag)
{
frame.iframe[0].contentDocument.firstChild.lastChild.style.display = "block";
tipFlag = true;
}

frame.doc.body.focus();
}

},
items : [
'bold','italic','underline','fontname','fontsize','forecolor','hilitecolor','link','selectall','source']
});
editor.focus();
});
//设置提示信息，这个要在html加载完成以后调用
function setPlaceholderText(text){
var data = utf8to16(base64decode(text)).replace(/\s/gi," ");
placeholderText = data;
if(editor && editor.edit && editor.edit.iframe[0] && editor.edit.iframe[0].contentDocument && editor.edit.iframe[0].contentDocument.firstChild && editor.edit.iframe[0].contentDocument.firstChild.lastChild){
editor.edit.iframe[0].contentDocument.firstChild.lastChild.placeholder='';
editor.edit.iframe[0].contentDocument.firstChild.lastChild.placeholder = data;
}
editor.focus();
}