59 lines
1.2 KiB
HTML
59 lines
1.2 KiB
HTML
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<!doctype html>
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<title>Railroad Diagram Generator</title>
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<script src="railroad-diagrams.js"></script>
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<link href="railroad-diagrams.css" rel=stylesheet>
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<textarea class='input'>Diagram(
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Optional('+', 'skip'),
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Choice(0,
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NonTerminal('name-start char'),
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NonTerminal('escape')),
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ZeroOrMore(
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Choice(0,
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NonTerminal('name char'),
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NonTerminal('escape'))))</textarea>
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<div class='output-image'></div>
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<textarea class='output-text' readonly></textarea>
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</div>
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<script>
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window.find = document.querySelector.bind(document);
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find('.input').addEventListener('input', process, false);
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window.addEventListener('load', process, false);
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function process() {
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var input = find('.input').value;
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try {
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var result = eval(input).format();
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} catch (e) {
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return;
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}
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find('.output-image').innerHTML = '';
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result.addTo(find('.output-image'));
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find('.output-text').textContent = result;
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}
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</script>
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<style>
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* { box-sizing: border-box; }
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.input {
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position: absolute;
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top: 0;
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left: 0;
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width: 50%;
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height: 50%;
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}
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.output-text {
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position: absolute;
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top: 0;
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right: 0;
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width: 50%;
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height: 50%;
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}
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.output-image {
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position: absolute;
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top: 50%;
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left: 0;
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right: 0;
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height: 50%;
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}
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</style>
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