prettyMath/prettyMath.html at master · yiziz/prettyMath · GitHub

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<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" >
    <head>
        <title>Pretty Math Demo</title>
		<link rel="stylesheet" type="text/css" href="mathquill.css" />

    </head>
    <body>
		<span class="mathquill-editable" id="mqContent" >f(x)=?</span><br />
		Mathquill: <input id="mqInput" type="text" style="width:200px" /><br />
		Symja: <input id="sjaInput" type="text" style="width:200px" />
		<script src="jquery.min.js" type="text/javascript" ></script>
		<script src="mathquill.js" type="text/javascript" ></script>
		<script type="text/javascript" >
			$(document).ready(function(){
				var mq = $("#mqContent");
				var mqC = $("#mqClone");
				var mqI = $("#mqInput");
				var sjaI = $("#sjaInput");
				mq.mathquill('revert');
				mq.mathquill('editable');

				mq.bind('keyup', function(e){
					//alert(e.keyCode);
					var latex;
					var LOG = 1;
					var CHAR = 0;
					var TRIG = 1;
					var SQRT = 1;
					var oldVal = mqI.val();
					var edVal = mq.mathquill('latex');
					var tempStr = edVal;
					// sqrt rule
					// change sqrt\: to \sqrt{}
					// does not handle cases such as space is already there prior to entering sqrt
					var newStr = tempStr.replace(/sqrt\\:/gi,"\\sqrt{}");
					if (tempStr != newStr) {
						tempStr = newStr;
						latex = SQRT;
					} else {
						newStr = tempStr.replace(/sin\\:/gi,"\\sin\\left(\\right)");
						newStr = newStr.replace(/([^\\])sin\\left\(\\right\)|^sin\\left\(\\right\)/gi,"$1\\sin\\left(\\right)");
						newStr = newStr.replace(/cos\\:/gi,"\\cos\\left(\\right)");
						newStr = newStr.replace(/([^\\])cos\\left\(\\right\)|^cos\\left\(\\right\)/gi,"$1\\cos\\left(\\right)");
						newStr = newStr.replace(/tan\\:/gi,"\\tan\\left(\\right)");
						newStr = newStr.replace(/([^\\])tan\\left\(\\right\)|^tan\\left\(\\right\)/gi,"$1\\tan\\left(\\right)");
						if (tempStr!= newStr) {
							tempStr = newStr;
							latex = TRIG;
						} else {
							newStr = tempStr.replace(/pi\\:/gi,"\\pi");
							newStr = newStr.replace(/E\\:/g,"\\text{E}");
							newStr = newStr.replace(/e\\:/g,"\\text{e}");
							if (tempStr != newStr) {
								tempStr = newStr;
								latex = CHAR;
							} else {
								newStr = tempStr.replace(/log\\:/gi,"\\log\\left(\\right)");
								newStr = newStr.replace(/([^\\])log\\left\(\\right\)|^log\\left\(\\right\)/gi,"$1\\log\\left(\\right)");
								newStr = newStr.replace(/ln\\:/gi,"\\ln\\left(\\right)");
								newStr = newStr.replace(/([^\\])ln\\left\(\\right\)|^ln\\left\(\\right\)/gi,"$1\\ln\\left(\\right)");
								if (tempStr != newStr) {
									tempStr = newStr;
									latex = LOG;
								} else {
								}

							}
						}

					}
					if (edVal != tempStr) {
						edVal = tempStr;
						// this causes to lose cursor
						var root = mq.data('[[mathquill internal data]]')['block'];
						//root.init('\\');
						// count cursor steps until end
						var next = root.cursor.next;
						var steps = latex;
						root.cursor.moveRight();
						var parent = root.cursor.parent;
						while (next != root.cursor.next || !mq.hasClass("hasCursor")) {
							steps++;
							next = root.cursor.next;
							root.cursor.moveRight();
						}

						var prev = root.cursor.prev;
						$(prev).data("cursorPrev", true);
						mq.mathquill('latex',edVal).focus();
						var root = mq.data('[[mathquill internal data]]')['block'];

						// move cursor back to right location
						while(steps > 0) {
							root.cursor.moveLeft();
							steps--;
						}
						$(prev).data("cursorPrev", false);

					}
					var newVal = edVal;
					mqI.val(newVal);
					if (oldVal != newVal) {
						mqI.change();
					}

				});


				mqI.change(function(){
					var mqVal = mqI.val();
					var edVal = mqVal;
					var tempStr = edVal;
					// change \: to spaces
					var newStr = tempStr.replace(/\\:/g," ");
					tempStr = newStr;
					// change \cdot to *
					newStr = tempStr.replace(/\\cdot/g,"*");
					tempStr = newStr;
					// change \pi to Pi
					newStr = tempStr.replace(/\\pi/g,"Pi");
					tempStr = newStr;
					// text
					newStr = tempStr.replace(/\\text{([a-zA-Z0-9]*)}/g,"$1");
					tempStr = newStr;


					// TODO: NO RECURSION DONE!!! NEED TO CORRECT ASAP

					// change frac to division
					newStr = tempStr.replace(/\\frac{(.*)}{(.*)}/g,"$1/$2");
					tempStr = newStr;
					// change {} to () for exponents
					newStr = tempStr.replace(/\^{([^}]+)}/g,"^($1)");
					tempStr = newStr;
					// change \left(\right) to ()
					newStr = tempStr.replace(/\\left\(([^\\right.]*)\\right\)/g,"($1)");
					tempStr = newStr;


					// change trig  and log functions
					// log and ln are assumed symja syntax
					newStr = tempStr.replace(/\\([a-z]*)\(([^\\.]*)\)/gi, function(m,p1, p2) {
						if (p1.length == 1) {
							return p1[0].toUpperCase() +"["+p2+"]";
						} else if (p1.length >1 ) {
							return p1[0].toUpperCase() + p1.substr(1) +"["+p2+"]";
						}
					});
					tempStr = newStr;

					//sqrt
					newStr = tempStr.replace(/\\sqrt{([^}]+)}|\\sqrt{}/gi,"Sqrt[$1]");
					tempStr = newStr;


					var sjaVal = tempStr;
					sjaI.val(sjaVal);
				});
			});
		</script>
	</body>
</html>