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<!doctype html>
<meta charset="utf-8">
<title>Test for zoom restoration when coming from the bfcache</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/SimpleTest/paint_listener.js"></script>
<link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
<script>
SimpleTest.waitForExplicitFinish();
/**
* - main page (this one) opens file_zoom_restore_bfcache.html
* - file_zoom_restore_bfcache.html sends "handlePageShow" to main page
* - main page sends file_zoom_restore_bfcache.html "case1sendData"
* - file_zoom_restore_bfcache.html sends "case1data" to main page
* - main page sends "case1click" to file_zoom_restore_bfcache.html
* - file_zoom_restore_bfcache.html clicks on <a> element, navigating to uri
* file_zoom_restore_bfcache.html?2, and gets bfcached
* - file_zoom_restore_bfcache.html?2 sends "handlePageShow" to main page
* - main page sends "case2sendData" to file_zoom_restore_bfcache.html?2
* - file_zoom_restore_bfcache.html?2 sends "case2data" to main page
* - main page sends "case2action" to file_zoom_restore_bfcache.html?2
* - file_zoom_restore_bfcache.html?2 sends "case2dataAnimationFrame" to main page
* - main page sends "case2back" to file_zoom_restore_bfcache.html?2
* - file_zoom_restore_bfcache.html?2 navigates back to file_zoom_restore_bfcache.html
* - file_zoom_restore_bfcache.html sends "handlePageShow" to main page
* - main page sends "case3sendData to file_zoom_restore_bfcache.html
* - file_zoom_restore_bfcache.html sends "case3data" to main page
* - main page sends "close to file_zoom_restore_bfcache.html
* - file_zoom_restore_bfcache.html closes bc and window and sends back "closed"
**/
const originalDPR = window.devicePixelRatio;
let loadCount = 0;
var bc = new BroadcastChannel("zoomRestoreBfcache");
var bcPage2 = new BroadcastChannel("zoomRestoreBfcache?2");
bc.onmessage = (msgEvent) => {
var msg = msgEvent.data;
var command = msg.command;
info(`Main page, received command from normal bc=${command}`);
switch (command) {
case "handlePageShow": {
handlePageShow(msgEvent.data.eventPersisted);
break;
}
case "case1data": {
is(loadCount, 1, "Case 1");
is(msg.devicePixelRatio, originalDPR, "No zoom");
bc.postMessage({command: "case1click"});
// The end of case 1
break;
}
case "case3data": {
is(loadCount, 2, "Case 3");
is(msg.devicePixelRatio, originalDPR * 2, "Should preserve zoom when restored");
SpecialPowers.spawnChrome([], () => {
// We use FullZoom in file_zoom_restore_bfcache.html to set the zoom level in the
// parent, but if FullZoom is not available then that will fail. So check it here
// and mark the test as todo if it's not available.
return "FullZoom" in this.browsingContext.top.embedderElement.ownerGlobal;
}).then((hasFullZoom) => {
if (SpecialPowers.Services.appinfo.sessionHistoryInParent && hasFullZoom) {
// When bfcache lives in the parent process, we get a proper zoom level
// update on the browsing context.
is(msg.frameDevicePixelRatio, originalDPR * 2, "Should preserve zoom on frames too");
} else {
todo_is(msg.frameDevicePixelRatio, originalDPR * 2, "Should preserve zoom on frames too");
}
bc.postMessage({command: "close"});
// Now we wait for "closed"
});
break;
}
case "closed": {
is(loadCount, 2, "Case 3");
bc.close();
SimpleTest.finish();
break;
}
default:
ok(false, "should not receive extra messages via BroadcastChannel");
}
}
bcPage2.onmessage = (msgEvent) => {
var msg = msgEvent.data;
var command = msg.command;
info(`Main page, received command from bc?2=${command}`);
switch (command) {
case "handlePageShow": {
handlePageShow(msgEvent.data.eventPersisted);
break;
}
case "case2data": {
is(loadCount, 2, "Case 2");
is(msg.devicePixelRatio, originalDPR, "No zoom (yet)")
is(msg.frameDevicePixelRatio, originalDPR, "No zoom on frame either");
bcPage2.postMessage({command: "case2action"});
// Now we wait for "case2dataAnimationFrame"
break;
}
case "case2dataAnimationFrame": {
is(loadCount, 2, "Case 2");
is(msg.devicePixelRatio, originalDPR * 2, "Zoomed");
is(msg.frameDevicePixelRatio, originalDPR * 2, "Zoomed iframe too");
bcPage2.postMessage({command: "case2back"});
bcPage2.close();
// The end of case 2
break;
}
default:
ok(false, "should not receive extra messages via BroadcastChannel");
}
}
function handlePageShow(persisted) {
ok(typeof persisted == "boolean", "Should get the persisted state from the pageshow event");
if (loadCount == 2) {
ok(persisted, "Should've gone into the bfcache after the back navigation");
} else {
ok(!persisted, "Should NOT be retrieved from bfcache");
}
if (loadCount == 0) {
loadCount++;
bc.postMessage({command: "case1sendData"});
// Now we wait for the "case1data" message
} else if (loadCount == 1) {
loadCount++;
bcPage2.postMessage({command: "case2sendData"});
// Now we wait for the "case2data" message
} else {
bc.postMessage({command: "case3sendData"});
// Now we wait for the "case3data" message
}
}
// If Fission is disabled, the pref is no-op.
SpecialPowers.pushPrefEnv({set: [["fission.bfcacheInParent", true]]}, () => {
window.open('file_zoom_restore_bfcache.html', '_blank', 'noopener');
});
</script>
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