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<!DOCTYPE html>
<html>
<head>
<title>Skia WebTry</title>
<meta charset='utf-8' />
<link rel="stylesheet" href="/css/" type="text/css" media="screen">
</head>
<body>
<section id=title>
<a href="/">Home</a>
<a href="/recent">Recent</a>
<a href="https://github.com/google/skia/tree/master/experimental/webtry">Code</a>
</section>
<section id=content>
<pre><code>#include "SkCanvas.h"
void draw(SkCanvas* canvas) {
<textarea name='code' id='code' rows='15' cols='80'>{{.UserCode}}</textarea>
}
</code></pre>
<input type='button' value='Run' id='run'>
<p>Image appears here:</p>
<img id='img' src=''/>
<pre><code id='output'></code></pre>
</section>
<script type='text/javascript' charset='utf-8'>
var run = document.getElementById('run');
var code = document.getElementById('code');
var output = document.getElementById('output');
var img = document.getElementById('img');
function beginWait() {
document.body.classList.add('waiting');
run.disabled = true;
}
function endWait() {
document.body.classList.remove('waiting');
run.disabled = false;
}
function codeComplete(e) {
// The response is JSON of the form:
// {
// "message": "you had an error...",
// "img": "<base64 encoded image but only on success>"
// }
//
// The img is optional and only appears if there is a valid
// image to display.
endWait();
console.log(e.target.response);
body = JSON.parse(e.target.response);
output.innerText = body.message;
if (body.hasOwnProperty('img')) {
img.src = 'data:image/png;base64,' + body.img;
} else {
img.src = '';
}
window.history.pushState(null, null, "/c/" + body.hash);
}
function codeError(e) {
endWait();
alert('Something bad happened: ' + e);
}
run.addEventListener('click', onSubmitCode);
function onSubmitCode() {
beginWait();
var req = new XMLHttpRequest();
req.addEventListener('load', codeComplete);
req.addEventListener('error', codeError);
req.overrideMimeType('application/json');
req.open('POST', '.', true);
req.send(code.value);
}
</script>
</body>
</html>
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