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<meta name="viewport" content="width=624">

<title>MathQuill Demo</title>

<link rel="stylesheet" type="text/css" href="support/home.css">
<link rel="stylesheet" type="text/css" href="../build/mathquill.css">

<style type="text/css">
code span {
  font: 90% Verdana, sans-serif;
}
#codecogsimg {
  vertical-align: middle;
  border: none;
}
.mathquill-text-field {
  width: 100%;
}
#html-source {
  display: none;
  font-size: 90%;
  white-space: pre-wrap;
}
.mq-math-mode .mq-editable-field {
  min-width: 1cm;
}
</style>

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<a href="http://github.com/laughinghan/mathquill"><img style="position: absolute; top: 0; right: 0; border: 0;" src="https://s3.amazonaws.com/github/ribbons/forkme_right_white_ffffff.png" alt="Fork me on GitHub!"></a>

<h1><a href="http://mathquill.github.com">MathQuill</a> Demo <small>local test page</small></h1>

<p>Math textbox with initial LaTeX: <span id="editable-math" class="mathquill-math-field">\frac{d}{dx}\sqrt{x}=</span></p>

<p><small>Try typing <code>1/2\sqrt x</code> and using the arrow keys to move around. Shortcut: use the tab key instead of arrow keys to get &quot;out&quot; of a command, like <code>a_n<span>[tab]</span>x^n</code>. Many LaTeX-style symbols and commands preceded by a backslash are supported, such as <code>\forall</code> or <code>n\choose k</code>.</small></p>

<p>Latex source: <textarea id="latex-source" style="width:80%;vertical-align:top"></textarea></p>

<p><button id="codecogs">Render LaTeX as an image with Code Cogs</button> <a id="codecogslink"><img id="codecogsimg" alt="LaTeX rendered as an image"> <span>Link</span></a></p>

<p><a href="javascript:;" id="show-html-source">Show Semantically Meaningful HTML Source</a></p>
<pre id="html-source"></pre>

<p>You could actually just copy-and-paste this HTML into any element with <code>class="mq-math-mode"</code> on a page that includes the <code>mathquill.css</code> and it would render beautifully, like this: <span class="mq-math-mode" id="html-transplant-example"></span></p>

<p>Any element with <code>class="mathquill-static-math"</code> whose contents are LaTeX source will be rendered as static math: <span class="mathquill-static-math">e^{i\pi}+1=0</span>. Note that if you're only rendering static math, <a href="http://mathjax.org">MathJax</a> supports more of LaTeX and renders better.</p>

<p>In many applications, such as a chat client, you probably type mostly normal text with some math interspersed, so there is also a MathQuill textbox that let's you type math between $'s: <span class="mathquill-text-field">The Quadratic Equation is $x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$</span></p>

<p>LaTeX math can also have textboxes inside: <span class="mathquill-static-math">\int\MathQuillMathField{}dx</span> or even <span class="mathquill-static-math">\sqrt{\MathQuillMathField{x^2+y^2}}</span></p>

<p>This button runs the JavaScript code written on it to MathQuill-ify the following <code>&lt;span&gt;</code> element into an editable math textbox: <button onclick="$(this).text('MathQuill(this.nextSibling).revert()'); MathQuill.MathField(this.nextSibling); var orig = arguments.callee; this.onclick = function(){ $(this).text('MathQuill.MathField(this.nextSibling)'); MathQuill(this.nextSibling).revert(); this.onclick = orig; };">MathQuill.MathField(this.nextSibling)</button><span>\frac{d}{dx}\sqrt{x} = \frac{d}{dx}x^{\frac{1}{2}} = \frac{1}{2}x^{-\frac{1}{2}} = \frac{1}{2\sqrt{x}}</span></p>

</div>
<script type="text/javascript" src="support/jquery-1.7.2.js"></script>
<script type="text/javascript" src="../build/mathquill.js"></script>
<script type="text/javascript">
MathQuill.interfaceVersion(1);

//on document ready, mathquill-ify all `<tag class="mathquill-*">latex</tag>`
//elements according to their CSS class.
$(function() {
  $('.mathquill-static-math').each(function() { MathQuill.StaticMath(this); });
  $('.mathquill-math-field').each(function() { MathQuill.MathField(this); });
  $('.mathquill-text-field').each(function() { MathQuill.TextField(this); });
});

$('#show-html-source').toggle(function() {
  $(this).html('Hide Semantically Meaningful HTML Source').parent().next().show();
}, function() {
  $(this).html('Show Semantically Meaningful HTML Source').parent().next().hide();
});

var latexMath = $('#editable-math'), latexSource = $('#latex-source'), htmlSource = $('#html-source'), codecogsimg = $('#codecogsimg'), codecogslink = $('#codecogslink'), htmlTransplantExample = $('#html-transplant-example');

$('#codecogs').click(function() {
  var latex = latexSource.val();
  codecogslink.attr('href','http://latex.codecogs.com/gif.latex?'+latex);
  codecogsimg.attr('src','http://latex.codecogs.com/gif.latex?'+latex);
});

$(function() {
  var latexMath = MathQuill($('#editable-math')[0]);
  $(latexMath.el()).bind('keydown keypress', function() {
    setTimeout(function() {
      var latex = latexMath.latex();
      latexSource.val(latex);
//      location.hash = '#'+latex; //extremely performance-crippling in Chrome for some reason
      htmlSource.text(printTree(latexMath.html()));
      htmlTransplantExample.html(latexMath.html());
    });
  }).keydown();
  latexMath.focus();

  latexSource.bind('keydown keypress', function() {
    var oldtext = latexSource.val();
    setTimeout(function() {
      var newtext = latexSource.val();
      if(newtext !== oldtext) {
        latexMath.latex(newtext);
        htmlSource.text(printTree(latexMath.html()));
        htmlTransplantExample.html(latexMath.html());
      }
    });
  });

  if(location.hash && location.hash.length > 1)
    latexMath.latex(decodeURIComponent(location.hash.slice(1))).focus();
});

//print the HTML source as an indented tree. TODO: syntax highlight
function printTree(html) {
  html = html.match(/<[a-z]+|<\/[a-z]+>|./ig);
  if (!html) return '';
  var indent = '\n', tree = [];
  for (var i = 0; i < html.length; i += 1) {
    var token = html[i];
    if (token.charAt(0) === '<') {
      if (token.charAt(1) === '/') { //dedent on close tag
        indent = indent.slice(0,-2);
        if (html[i+1] && html[i+1].slice(0,2) === '</') //but maintain indent for close tags that come after other close tags
          token += indent.slice(0,-2);
      }
      else { //indent on open tag
        tree.push(indent);
        indent += '  ';
      }

      token = token.toLowerCase();
    }

    tree.push(token);
  }
  return tree.join('').slice(1);
}
</script>
</body>
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