2020-04-23 18:23:53 +03:00
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<!doctype html>
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<script>
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2021-02-03 21:11:02 +03:00
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var bcName = "zoomRestoreBfcache" + window.location.search;
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var bc = new BroadcastChannel(bcName);
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if (window.location.search == "?2") {
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bc.onmessage = (msgEvent) => {
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var msg = msgEvent.data;
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var command = msg.command;
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dump(`Subpage ?2 received command=${command}\n`);
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switch (command) {
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case "case2sendData": {
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bc.postMessage({command: "case2data", devicePixelRatio: window.devicePixelRatio,
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frameDevicePixelRatio: document.querySelector("iframe").contentWindow.devicePixelRatio});
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break;
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}
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case "case2action": {
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SpecialPowers.spawnChrome([], () => {
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const FullZoom = this.browsingContext.embedderElement.ownerGlobal.FullZoom;
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FullZoom.setZoom(2.0);
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});
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SpecialPowers.setFullZoom(window, 2);
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window.requestAnimationFrame(() => window.requestAnimationFrame(() => {
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bc.postMessage({command: "case2dataAnimationFrame", devicePixelRatio: window.devicePixelRatio,
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frameDevicePixelRatio: document.querySelector("iframe").contentWindow.devicePixelRatio });
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}));
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break;
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}
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case "case2back": {
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bc.close();
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window.history.back();
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break;
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}
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}
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}
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} else {
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bc.onmessage = (msgEvent) => {
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var msg = msgEvent.data;
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var command = msg.command;
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dump(`Subpage received command=${command}\n`);
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switch (command) {
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case "case1sendData": {
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bc.postMessage({command: "case1data", devicePixelRatio: window.devicePixelRatio});
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break;
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}
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case "case1click": {
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document.querySelector("a").click();
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// We are opening file_zoom_restore_bfcache.html?2, so the current
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// page is going into bfcache
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break;
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}
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case "case3sendData": {
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// We came back from bfcache
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2021-03-30 22:09:54 +03:00
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function waitUntilZoomLevelRestored() {
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// Zoom level is updated asynchronously when bfcache lives in the
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// parent process.
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if (window.devicePixelRatio == 2) {
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bc.postMessage({command: "case3data", devicePixelRatio: window.devicePixelRatio,
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frameDevicePixelRatio: document.querySelector("iframe").contentWindow.devicePixelRatio});
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return;
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}
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window.requestAnimationFrame(waitUntilZoomLevelRestored);
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}
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window.requestAnimationFrame(waitUntilZoomLevelRestored);
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2021-02-03 21:11:02 +03:00
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break;
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}
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case "close": {
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SpecialPowers.spawnChrome([], () => {
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const FullZoom = this.browsingContext.embedderElement.ownerGlobal.FullZoom;
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FullZoom.setZoom(1.0);
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});
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bc.postMessage({command: "closed"});
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bc.close();
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window.close();
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break;
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}
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}
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}
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}
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2020-04-23 18:23:53 +03:00
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window.addEventListener("pageshow", function(e) {
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2021-02-03 21:11:02 +03:00
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bc.postMessage({command: "handlePageShow", eventPersisted: e.persisted});
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2020-04-23 18:23:53 +03:00
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});
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</script>
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2021-02-03 21:11:02 +03:00
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<a href="?2">This is a very interesting page</a>
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2020-04-23 18:23:53 +03:00
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<iframe srcdoc="And this is a nested frame"></iframe>
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