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<meta charset="utf-8">
<title>Ensure positioned content inside inactive scollframes but on top of OOPIFs hit-test properly</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/SimpleTest/paint_listener.js"></script>
<script src="helper_fission_utils.js"></script>
<script src="apz_test_utils.js"></script>
<script src="apz_test_native_event_utils.js"></script>
.then(loadOOPIFrame("testframe", "helper_fission_empty.html"))
.then(FissionTestHelper.subtestDone, FissionTestHelper.subtestFailed);
let make_oopif_scrollable = function() {
// ensure the oopif is scrollable, and wait for the paint so that the
// compositor also knows it's scrollable. = "200vh";
promiseApzFlushedRepaints().then(() => {
let utils = SpecialPowers.getDOMWindowUtils(window);
let result = {
layersId: utils.getLayersId(),
viewId: utils.getViewId(document.scrollingElement)
dump(`OOPIF computed IDs ${JSON.stringify(result)}\n`);
FissionTestHelper.fireEventInEmbedder("OOPIF:Scrollable", result);
return true;
async function test() {
let iframe = document.getElementById("testframe");
let oopifScrollerIdsPromise = promiseOneEvent(window, "OOPIF:Scrollable", null);
ok(await FissionTestHelper.sendToOopif(iframe, `(${make_oopif_scrollable})()`),
"Ran code to make OOPIF scrollable");
let oopifScrollerIds = (await oopifScrollerIdsPromise).data;
let config = getHitTestConfig();
let utils = config.utils;
// The #scroller div is (a) inactive, and (b) under the OOPIF. However, it
// also contains a positioned element with a high z-index (#abspos). #abspos
// therefore sits on top of the OOPIF. Hit-testing on #abspos should hit
// #scroller, but anywhere else within the OOPIF box should hit the OOPIF.
checkHitResult(await fissionHitTest(centerOf("abspos"), iframe),
APZHitResultFlags.VISIBLE |
(config.activateAllScrollFrames ? 0 : APZHitResultFlags.INACTIVE_SCROLLFRAME),
config.activateAllScrollFrames ?
utils.getViewId(document.getElementById("scroller")) :
"abspos element on top of OOPIF should hit parent doc hosting the OOPIF");
// If the fix for the bug this test is for is not active (as indicated by
// config.activateAllScrollFrames) then we just accept the wrong answer. As
// of writing this comment the fix will only be active if fission is pref'ed
// on, not just enabled for this window, ie the test suite is run in fission
// mode.
checkHitResult(await fissionHitTest(centerOf("scroller"), iframe),
APZHitResultFlags.VISIBLE |
(config.activateAllScrollFrames ? 0 : APZHitResultFlags.INACTIVE_SCROLLFRAME),
config.activateAllScrollFrames ?
oopifScrollerIds.viewId :
config.activateAllScrollFrames ?
oopifScrollerIds.layersId :
"Part of OOPIF sitting on top of the inactive scrollframe should hit OOPIF");
checkHitResult(await fissionHitTest({x: 250, y: 100}, iframe),
"part of OOPIF outside the inactive scfollframe rect should hit the OOPIF");
html, body {
margin: 0;
body {
/* Ensure root document is scrollable so that #scroller is inactive by
default */
height: 200vh;
iframe {
position: absolute;
width: 300px;
height: 200px;
#scroller {
position: absolute;
top: 0;
left: 0;
width: 200px;
height: 200px;
background-color: transparent;
overflow-y: scroll;
<div id="scroller">
<div style="height:500px">inside scroller</div>
<div id="abspos" style="position: absolute; z-index: 5; left: 0; width: 80px; top: 20px; height: 80px; background-color: green">abspos inside scroller</div>
<iframe id="testframe"></iframe>