ColorizedMathEditor/index.html at master · kazad/ColorizedMathEditor · GitHub

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<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <meta name="description" content="Open source rich text editor based on HTML5 and the progressive-enhancement approach. Uses a sophisticated security concept and aims to generate fully valid HTML5 markup by preventing unmaintainable tag soups and inline styles.">
    <title>Colorized Equation Editor Demo</title>
    <link rel="stylesheet" href="http://yui.yahooapis.com/2.9.0/build/reset/reset-min.css">
    <link rel="stylesheet" href="css/stylesheet.css">
    <link rel="stylesheet" href="css/colors.css">
    <script src="vendor/advanced.js"></script>
    <script src="vendor/wysihtml5-0.3.0.min.js"></script>
    <script type="text/javascript" async src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.2/MathJax.js?config=TeX-MML-AM_CHTML">
    </script>
    <script type="text/x-mathjax-config">
        MathJax.Hub.Config({ TeX: { extensions: ["color.js"] }});

      /*
      MathJax.Hub.Config({
        showProcessingMessages: false,
        tex2jax: { inlineMath: [['$','$'],['\\(','\\)']] }
      });
      */
    </script>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.9.0-alpha/katex.min.css">
    <script src="https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.9.0-alpha/katex.min.js"></script>
</head>

<body>
    <h2>Edit</h2>
    <div id="wysihtml5-editor-toolbar">
        <header>
            <ul class="commands">
                <li data-wysihtml5-command="foreColor" data-wysihtml5-command-value="plain" class="wysiwyg-color-plain"></li>
                <li data-wysihtml5-command="foreColor" data-wysihtml5-command-value="c1" class="wysiwyg-color-c1"></li>
                <li data-wysihtml5-command="foreColor" data-wysihtml5-command-value="c2" class="wysiwyg-color-c2"></li>
                <li data-wysihtml5-command="foreColor" data-wysihtml5-command-value="c3" class="wysiwyg-color-c3"></li>
                <li data-wysihtml5-command="foreColor" data-wysihtml5-command-value="c4" class="wysiwyg-color-c4"></li>
                <li data-wysihtml5-command="foreColor" data-wysihtml5-command-value="c5" class="wysiwyg-color-c5"></li>
                <li data-wysihtml5-command="foreColor" data-wysihtml5-command-value="c6" class="wysiwyg-color-c6"></li>
                <li data-wysihtml5-action="change_view" title="Show HTML" class="action"></li>
            </ul>
        </header>
    </div>
    <section>
        <textarea id="wysihtml5-editor" spellcheck="false" wrap="off" autofocus placeholder="Enter something ...">
       $$<span class="wysiwyg-color-c1">e</span>^{<span class="wysiwyg-color-c2">i</span> <span class="wysiwyg-color-c3">x</span>} = <span class="wysiwyg-color-c4">\cos(x) </span>+ <span class="wysiwyg-color-c5">i\sin(x)</span>$$

        <br><span class="wysiwyg-color-c1"><br>Growth</span> in a <span class="wysiwyg-color-c2">perpendicular direction</span>
over <span class="wysiwyg-color-c3">time</span> is circular:
<br>
here are the <span class="wysiwyg-color-c4">horizontal</span> and <span class="wysiwyg-color-c5">vertical</span> coordinates
      </textarea>

        <h2>Rendered</h2>

        <div id="math">
        </div>

        <pre id="preamble" style="display: none;">
\definecolor{c1}{RGB}{114,0,172}
\definecolor{c2}{RGB}{45,177,93}
\definecolor{c3}{RGB}{251,0,29}
\definecolor{c4}{RGB}{18,110,213}
\definecolor{c5}{RGB}{255,160,109}
\definecolor{c6}{RGB}{219,78,158}
\newcommand{\plain}{\color{black}}
      </pre>

        <h2>LaTeX</h2>
        <pre id="latex">
      </pre>

        <div id="math-katex">
        </div>
    </section>
    <style>
    #wysihtml5-editor {
        font-size: 1.5rem;
        font-family: Lato, Arial, Helvetica;
    }

    li.wysiwyg-color-plain {
        background: black;
    }

    li.wysiwyg-color-c1 {
        background: rgb(114, 0, 172);
    }

    li.wysiwyg-color-c2 {
        background: rgb(45, 177, 9);
    }

    li.wysiwyg-color-c3 {
        background: rgb(251, 0, 29);
    }

    li.wysiwyg-color-c4 {
        background: rgb(18, 110, 213);
    }

    li.wysiwyg-color-c5 {
        background: rgb(255, 160, 109);
    }

    li.wysiwyg-color-c6 {
        background: rgb(219, 78, 158);
    }

    div#math,
    #math2 {
        text-align: center;
        font-size: 1.5rem;
        font-family: Lato, Arial, Helvetica;
    }
    h2 {
      text-align: center;
      border-bottom: 1px solid #ccc;
      padding: 1rem;
      margin: 1rem;
    }

    pre {
      overflow: scroll;
    }

    </style>
    <script>
    wysihtml5ParserRules.classes["wysiwyg-color-plain"] = 1;
    wysihtml5ParserRules.classes["wysiwyg-color-c1"] = 1;
    wysihtml5ParserRules.classes["wysiwyg-color-c2"] = 1;
    wysihtml5ParserRules.classes["wysiwyg-color-c3"] = 1;
    wysihtml5ParserRules.classes["wysiwyg-color-c4"] = 1;
    wysihtml5ParserRules.classes["wysiwyg-color-c5"] = 1;
    wysihtml5ParserRules.classes["wysiwyg-color-c6"] = 1;

    var editor = new wysihtml5.Editor("wysihtml5-editor", {
        toolbar: "wysihtml5-editor-toolbar",
        stylesheets: ["http://yui.yahooapis.com/2.9.0/build/reset/reset-min.css", "css/editor.css", "css/colors.css"],
        parserRules: wysihtml5ParserRules
    });

    function parseMath(html, preamble) {

        cleaned_html = html.trim().replace(/[&]nbsp;/g, " ");
        var math = cleaned_html.match(/.*[$]+(.*)[$]+.*/)[0].replace(/[$][$]/g, "");
        var latex = math.replace(/<span class="wysiwyg-color-(\w+)">/ig, "\\color{$1} ").replace(/[<][/]span[>]/ig, "\\plain ").replace(/<br>/g, " ");
        var colorized_latex = preamble + latex;

        colorized_html = cleaned_html.replace(/[$][$](.*)[$][$]/, "\\[" + colorized_latex + "\\]");

        return {
            html: cleaned_html,
            math: math,
            latex: latex,
            colorized_latex: colorized_latex,
            colorized_html: colorized_html
        }
    }

    function renderMath() {
        var mathEl = document.getElementById("math");
        var html = editor.getValue();

        var preamble = document.getElementById("preamble").innerText;

        var parsed = parseMath(html, preamble);

        console.log(parsed);

        mathEl.innerHTML = parsed.colorized_html;

        var latexEl = document.getElementById("latex");
        latexEl.innerText = parsed.colorized_html;

        MathJax.Hub.Queue(["Typeset", MathJax.Hub, mathEl]);

        var mathkatex = document.getElementById("math-katex");
        katex.default.renderToString(parsed.colorized_latex, mathkatex, {
            displayMode: true,
            macros: {
                "\\plain": "\\color{black}",
                "\\c1": "\\color{red}",
                "\\c2": "\\color{yellow}",
                "\\c3": "\\color{green}",
                "\\c4": "\\color{blue}",
                "\\c5": "\\color{orange}",
                "\\c6": "\\color{purple}",
            }
        });

        // renderMathInElement(mathEl);
        console.log(html);
    }

    editor.on("change", renderMath);
    editor.on("interaction", renderMath);
    editor.on("load", renderMath);
    </script>
</body>

</html>