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<!DOCTYPE html>
<html>
<head>
<script>
let stream = null;
function promptForCapture(constraints)
{
if (!window.internals) {
window.webkit.messageHandlers.testHandler.postMessage('test requires internals');
return;
}
window.internals.withUserGesture(() => {
navigator.mediaDevices.getDisplayMedia(constraints)
.then((s) => {
stream = s;
video.srcObject = stream;
if (window.webkit)
window.webkit.messageHandlers.testHandler.postMessage('allowed');
})
.catch((error) => {
if (window.webkit)
window.webkit.messageHandlers.testHandler.postMessage('denied');
});
});
}
function stop(kind)
{
if (!stream)
return;
let activeTracks = [];
stream.getTracks().forEach(track => {
if (!kind || track.kind == kind)
track.stop();
else
activeTracks.push(track);
});
if (!activeTracks.length) {
stream = null;
video.srcObject = null;
}
}
function haveStream()
{
return stream !== null;
}
</script>
<head>
<body>
<video id="video" controls></video>
<p>
<button onclick="stop()">Stop</button>
</p>
</body>
</html>
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