formula.html
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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<link rel="stylesheet" href="../../third-party/mathquill/mathquill.css"/>
<style>
html, body, .main{
margin: 0;
padding: 0;
overflow: hidden;
}
.main{
width:1024px;
height:1024px;
}
.mathquill-editable,
.mathquill-rendered-math{
border: 0px;
padding: 0px;
margin:4px;
}
</style>
</head>
<body>
<div class="main">
<div class="mathquill-editable"></div>
</div>
<div>
<input id="blurHelper" />
</div>
<script src="../../third-party/jquery.min.js"></script>
<script src="../../third-party/mathquill/mathquill.js"></script>
<script>
$(function(){
var UM = parent.UM,
$iframe = $(getSelfIframe()),
editorId = $iframe.parents('.edui-body-container').attr('id'),
editor = UM.getEditor(editorId),
timer;
/* 获得当前公式所在的iframe节点 */
function getSelfIframe(){
var iframes = parent.document.getElementsByTagName('iframe');
for (var key in iframes) {
if (iframes[key].contentWindow == window) {
return iframes[key];
}
}
return null;
}
/* 获得当前url上的hash存储的参数值 */
function getLatex() {
return $iframe.attr('data-latex') || '';
}
/* 保存场景 */
function saveScene(){
timer && clearTimeout(timer);
timer = setTimeout(function(){
editor.fireEvent('savescene');
editor.fireEvent('contentchange');
editor.fireEvent('selectionchange');
timer = null;
}, 300);
}
/* 设置编辑器可编辑 */
function enableEditor(){
if(editor.body.contentEditable == 'false') {
editor.setEnabled();
}
}
/* 设置编辑器不可编辑 */
function disableEditor(){
if(editor.body.contentEditable == 'true') {
editor.setDisabled(['undo', 'redo', 'preview', 'formula'], true);
}
}
/* 公式 */
var Formula = function(){
var _this = this,
latex = getLatex();
this.isFocus = false;
this.isDisabled = false;
/* 加载公式内容 */
this.$mathquill = $('.mathquill-editable').mathquill('latex', latex);
/* 设置活动状态的公式iframe */
this.$mathquill.on('mousedown', function(){
/* 编辑器不可用时,公式也不可用 */
if(_this.disabled) return false;
/* 第一次点击当前公式,设置公式活动 */
if(!$iframe.hasClass('edui-formula-active')) {
disableEditor();
editor.blur();
editor.$body.find('iframe').not($iframe).each(function(k, v){
v.contentWindow.formula.blur();
});
if(_this.$mathquill.find('.cursor').css('display') == 'none') {
_this.refresh();
_this.$mathquill.addClass('hasCursor');
}
}
_this.focus();
});
editor.addListener('click', function(){
_this.blur();
enableEditor();
});
/* 里面focus,编辑器也判断为focus */
editor.addListener('isFocus', function(){
return _this.isFocus;
});
/* um不可用,公式也不可编辑 */
editor.addListener('setDisabled', function(type, except){
if (!(except && except.join(' ').indexOf('formula') != -1) && _this.isDisabled != true ) {
_this.setDisabled();
}
});
editor.addListener('setEnabled', function(){
if (_this.isDisabled != false) {
_this.setEnabled();
}
});
/* 设置更新外层iframe的大小和属性 */
$(document.body).on('keydown', function(){
_this.updateIframe();
}).on('keyup', function(){
_this.updateIframe();
});
/* 清除初始化的高亮状态 */
this.$mathquill.removeClass('hasCursor');
/* 初始化后延迟刷新外层iframe大小 */
setTimeout(function(){
_this.updateIframe();
}, 300);
};
Formula.prototype = {
focus:function(){
$iframe.addClass('edui-formula-active');
this.isFocus = true;
},
blur:function(){
$iframe.removeClass('edui-formula-active');
this.removeCursor();
this.isFocus = false;
},
removeCursor: function(){
this.$mathquill.find('span.cursor').hide();
this.$mathquill.parent().find('.hasCursor').removeClass('hasCursor');
},
updateIframe: function(){
$iframe.width(this.$mathquill.width()+8).height(this.$mathquill.height()+8);
var latex = $iframe.attr('data-latex'),
newLatex = this.getLatex();
if(latex != newLatex) {
$iframe.attr('data-latex', this.getLatex());
saveScene();
}
},
insertLatex: function(latex){
this.$mathquill.mathquill('write', latex);
this.updateIframe();
this.removeCursor();
},
setLatex: function(latex){
this.$mathquill.mathquill('latex', latex);
this.updateIframe();
},
getLatex: function(){
return this.$mathquill.mathquill('latex');
},
redraw: function(){
this.$mathquill.mathquill('redraw');
},
setDisabled: function(){
this.blur();
var latex = this.getLatex();
this.$mathquill.mathquill('revert').text(latex).mathquill();
this.updateIframe();
this.isDisabled = true;
},
setEnabled: function(){
this.$mathquill.removeClass('mathquill-rendered-math');
this.refresh();
this.isDisabled = false;
},
refresh: function(){
var latex = this.getLatex();
this.$mathquill.mathquill('revert').text(latex).mathquill('editable');
this.updateIframe();
}
};
/* 绑定到window上，给上级window调用 */
window.formula = new Formula();
});
</script>
</body>
</html>