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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=1212477
-->
<head>
<meta charset="utf-8">
<title>Test for Bug 1212477 - Needs a way to access to <canvas>'s context (2d, webgl) from Anonymous Content API</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1212477">Mozilla Bug 1212477</a>
<div>
<div id="id" class="test">text content</div>
<canvas id="canvas2d"></canvas>
<canvas id="canvas-webgl"></canvas>
<canvas id="canvas-foo"></canvas>
</div>
<script type="application/javascript">
let chromeDocument = SpecialPowers.wrap(document);
let testElement = document.querySelector("div");
let anonymousContent = chromeDocument.insertAnonymousContent(testElement);
is(anonymousContent.getCanvasContext("id", "2d"), null,
"Context is null for non-canvas elements");
let context2d = anonymousContent.getCanvasContext("canvas2d", "2d");
is(context2d.toString(), "[object CanvasRenderingContext2D]",
"2D Context is returned properly");
is(context2d.canvas, null,
"context's canvas property is null in anonymous content");
is (anonymousContent.getCanvasContext("canvas-foo", "foo"), null,
"Context is null for unknown context type");
SimpleTest.doesThrow(
() => anonymousContent.getCanvasContext("foo", "2d"),
"NS_ERROR_NOT_AVAILABLE",
"Get a context using unexisting id should throw"
);
const normalWebGL = document.createElement('canvas').getContext('webgl');
if (normalWebGL) {
let webgl = anonymousContent.getCanvasContext("canvas-webgl", "webgl");
is(webgl.toString(), "[object WebGLRenderingContext]",
"WebGL Context is returned properly");
is(webgl.canvas, null,
"WebGL context's canvas property is null in anonymous content");
}
chromeDocument.removeAnonymousContent(anonymousContent);
</script>
</body>
</html>
|
