Source code
Revision control
Copy as Markdown
Other Tools
<script src="/common/PrefixedPostMessage.js"></script>
<script>
var prefixedMessage = new PrefixedMessageResource();
var max = 150, attempts = 0;
const urlParams = new URLSearchParams(location.search);
const expected_innerWidth = urlParams.get('expected_innerWidth');
const expected_innerHeight = urlParams.get('expected_innerHeight');
const expected_screenX = urlParams.get('expected_screenX');
const expected_screenY = urlParams.get('expected_screenY');
let should_wait_until_settled = expected_innerWidth === null && expected_innerHeight === null && expected_screenX === null && expected_screenY === null;
function sendCoordinates() {
// Certain windowing systems position windows asynchronously.
// As a result, the window may not be positioned yet when the
// load event fires. To accommodate this, allow waiting up to
// 15 seconds for positioning to take place.
if ((!window.screenX && expected_screenX) &&
(!window.screenY && expected_screenY) && ++attempts < max) {
setTimeout(sendCoordinates, 100);
return;
}
if (expected_innerWidth && window.innerWidth != expected_innerWidth && ++attempts < max) {
setTimeout(sendCoordinates, 10);
return;
}
if (expected_innerHeight && window.innerHeight != expected_innerHeight && ++attempts < max) {
setTimeout(sendCoordinates, 10);
return;
}
if (expected_screenX && window.screenX != expected_screenX && ++attempts < max) {
setTimeout(sendCoordinates, 10);
return;
}
if (expected_screenY && window.screenY != expected_screenY && ++attempts < max) {
setTimeout(sendCoordinates, 10);
return;
}
if (should_wait_until_settled) {
should_wait_until_settled = false;
setTimeout(sendCoordinates, 300);
return;
}
prefixedMessage.postToOpener({
left: window.screenX,
top: window.screenY,
width: window.innerWidth,
height: window.innerHeight
});
}
window.addEventListener('load', sendCoordinates);
</script>