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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
const DIRPATH = getRootDirectory(gTestPath).replace(
"chrome://mochitests/content/",
""
);
const parentPATH = DIRPATH + "empty.html";
const iframePATH = DIRPATH + "empty.html";
const parentURL = `http://example.com/${parentPATH}`;
const iframeURL = `http://example.org/${iframePATH}`;
add_task(async function setup_pref() {
await SpecialPowers.pushPrefEnv({
set: [
// To avoid throttling requestAnimationFrame callbacks in invisible
// iframes
["layout.throttled_frame_rate", 60],
],
});
});
add_task(async function () {
const win = await BrowserTestUtils.openNewBrowserWindow({
fission: true,
});
try {
const browser = win.gBrowser.selectedTab.linkedBrowser;
BrowserTestUtils.startLoadingURIString(browser, parentURL);
await BrowserTestUtils.browserLoaded(browser, false, parentURL);
async function setup(url) {
const scroller = content.document.createElement("div");
scroller.style = "width: 300px; height: 300px; overflow: scroll;";
scroller.setAttribute("id", "scroller");
content.document.body.appendChild(scroller);
// Make a space bigger than display port.
const spacer = content.document.createElement("div");
spacer.style = "width: 100%; height: 10000px;";
scroller.appendChild(spacer);
const iframe = content.document.createElement("iframe");
scroller.appendChild(iframe);
iframe.contentWindow.location = url;
await new Promise(resolve => {
iframe.addEventListener("load", resolve, { once: true });
});
return iframe.browsingContext;
}
async function setupImage() {
const img = content.document.createElement("img");
// This GIF is a 100ms interval animation.
img.setAttribute("src", "animated.gif");
img.setAttribute("id", "img");
content.document.body.appendChild(img);
const spacer = content.document.createElement("div");
spacer.style = "width: 100%; height: 10000px;";
content.document.body.appendChild(spacer);
await new Promise(resolve => {
img.addEventListener("load", resolve, { once: true });
});
}
// Returns the count of frameUpdate during |time| (in ms) period.
async function observeFrameUpdate(time) {
function ImageDecoderObserverStub() {
this.sizeAvailable = function sizeAvailable() {};
this.frameComplete = function frameComplete() {};
this.decodeComplete = function decodeComplete() {};
this.loadComplete = function loadComplete() {};
this.frameUpdate = function frameUpdate() {};
this.discard = function discard() {};
this.isAnimated = function isAnimated() {};
this.hasTransparency = function hasTransparency() {};
}
// Start from the callback of setTimeout.
await new Promise(resolve => content.window.setTimeout(resolve, 0));
let frameCount = 0;
const observer = new ImageDecoderObserverStub();
observer.frameUpdate = () => {
frameCount++;
};
observer.loadComplete = () => {
// Ignore the frameUpdate callback along with loadComplete. It seems
// a frameUpdate sometimes happens with a loadComplete when attatching
// observer in fission world.
frameCount--;
};
const gObserver = SpecialPowers.Cc["@mozilla.org/image/tools;1"]
.getService(SpecialPowers.Ci.imgITools)
.createScriptedObserver(observer);
const img = content.document.getElementById("img");
SpecialPowers.wrap(img).addObserver(gObserver);
await new Promise(resolve => content.window.setTimeout(resolve, time));
SpecialPowers.wrap(img).removeObserver(gObserver);
return frameCount;
}
// Setup an iframe which is initially scrolled out.
const iframe = await SpecialPowers.spawn(browser, [iframeURL], setup);
// Setup a 100ms interval animated GIF image in the iframe.
await SpecialPowers.spawn(iframe, [], setupImage);
let frameCount = await SpecialPowers.spawn(
iframe,
[1000],
observeFrameUpdate
);
// Bug 1577084.
if (frameCount == 0) {
is(frameCount, 0, "no frameupdates");
} else {
todo_is(frameCount, 0, "no frameupdates");
}
// Scroll the iframe into view.
await SpecialPowers.spawn(browser, [], async () => {
const scroller = content.document.getElementById("scroller");
scroller.scrollTo({ left: 0, top: 9800, behavior: "smooth" });
await new Promise(resolve => content.window.setTimeout(resolve, 1000));
});
await new Promise(resolve => requestAnimationFrame(resolve));
frameCount = await SpecialPowers.spawn(iframe, [1000], observeFrameUpdate);
Assert.greater(frameCount, 0, "There should be frameUpdate(s)");
await new Promise(resolve => requestAnimationFrame(resolve));
await SpecialPowers.spawn(iframe, [], async () => {
const img = content.document.getElementById("img");
// Move the image outside of the scroll port. 'position: absolute' causes
// a relow on the image element.
img.style = "position: absolute; top: 9000px;";
await new Promise(resolve =>
content.window.requestAnimationFrame(resolve)
);
});
await new Promise(resolve => requestAnimationFrame(resolve));
frameCount = await SpecialPowers.spawn(iframe, [1000], observeFrameUpdate);
is(frameCount, 0, "No frameUpdate should happen");
} finally {
await BrowserTestUtils.closeWindow(win);
}
});
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