nextcloud-mephi/apps/external/templates/frame.php

<iframe src="<?php echo $_['url']; ?>" width="100%" id="ifm" ></iframe>


<script language="JavaScript">
<!--

function pageY(elem) {
    return elem.offsetParent ? (elem.offsetTop + pageY(elem.offsetParent)) : elem.offsetTop;
}
var buffer = 5; //scroll bar buffer
function resizeIframe() {
    var height = document.documentElement.clientHeight;
    height -= pageY(document.getElementById('ifm'))+ buffer ;
    height = (height < 0) ? 0 : height;
    document.getElementById('ifm').style.height = height + 'px';
}

document.getElementById('ifm').onload=resizeIframe;
window.onresize = resizeIframe;

//-->
</script>