scientific-javascript/index.html at master · gkjohnson/scientific-javascript · GitHub

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<html>
    <head>
        <script type="text/javascript" src="/node_modules/underscore/underscore.js"></script>
        <script type="text/javascript" src="/node_modules/ace-builds/src/ace.js"></script>
        <script type="text/javascript" src="/node_modules/decimal/lib/decimal.js"></script>
        <script type="text/javascript" src="/node_modules/js-quantities/build/quantities.js"></script>
        <script type="text/javascript" src="/scripts/mode-scientific-javascript.js"></script>
        <script type="text/javascript" src="/scripts/sjsNumber.js"></script>

        <script data-main="/node_modules/sweet.js/browser/scripts/editor.js" src="/node_modules/sweet.js/browser/scripts/require.js"></script>
        <style type="text/css">
            /* Syntax Highlighting */
            .ace_kw { color : #09f; }
            .ace_units { color: #f90; }
            .ace_cmt { opacity:0.5; }
            .ace_num { color: #05a; }
            .ace_string {color:red}

            html, body, #wrapper {
                height: 100%;
                margin: 0;
                padding: 0;
                font-family: monospace;
            }

            #wrapper {
                display: flex;
                overflow: hidden;
            }
            #wrapper > * {
                flex: 1;
                height: 100%;
            }

            #output-wrapper {
                flex: 0.5;
                display: flex;
                flex-direction: column;
            }

            #error {
                background-color: #E91E63;
                color:white;
                padding: 5px;
            }

            #error:empty {
                display: none;
            }

            #output {
                flex: 1;
                padding: 5px 10px;
                margin: 0;

                overflow: auto;

                border-left: 1px solid #eee;
            }

            #output:before {
                content: "output";
                color: #aaa;
                display: block;
            }

        </style>
    </head>
    <body>
        <div id="wrapper">
            <div id="editor"></div>
            <div id="output-wrapper">
                <div id="error"></div>
                <pre id="output"></pre>
            </div>
        </div>
        <script type="text/javascript">

            const code = `
                // basic print statement
                const x = 100<kg>
                console.log(x)

                // unit multiplication
                const mkg = 100<m> * 100<kg>
                console.log(mkg, mkg === 10000<m*kg>)

                // unit division
                console.log(mkg/1<kg>)

                // unit iteration
                for(var i = 0<m>; i < 5<m>; i = i + 10<cm>) console.log(i)

                // throws incompatible units error
                100<kg> + 1<m>
                `.replace(/\n +/g, '\n');

            // Editor setup
            const editor = ace.edit('editor');
            editor.session.setMode('ace/mode/scientific-javascript');
            editor.setShowPrintMargin(false)
            editor.session.setValue(code)

            // Run the code
            const runCode = code => {
                const output = document.querySelector('#output')
                const error = document.querySelector('#error')
                output.innerHTML = ""

                // override console to catch logs
                const _origConsole = console.log
                console.log = (...args) => args.forEach(arg => output.innerHTML += arg.toString() + '\n')

                // run and watch for errors
                try {
                    eval(code)
                    error.innerHTML = ''
                } catch(e) {
                    error.innerHTML = e.toString()
                }
                console.log = _origConsole
            }

            // covert the code on the server and run
            const execute = _.debounce(() => {
                fetch('/compile', {
                    method: 'POST',
                    headers: {
                        'Accept': 'application/json, text/plain, */*',
                        'Content-Type': 'application/json'
                    },
                    body: JSON.stringify({ text: editor.session.getValue() })
                })
                .then(res => res.text())
                .then(code => runCode(code))
            }, 500);
            execute()

            editor.session.on('change', () => execute( editor.session.getValue() ));
            // TODO :
            // -- change backend to use another units library and decimaljs
            // -- enable creation of functions that require certain units for parameters
            // -- on variable creation, enable unit specification to force a unit on creation
            // -- allow unit casting after parantheses for checks and print casts
        </script>
    </body>
</html>