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async function maximizeWindow(win) {
if (win.windowState != win.STATE_MAXIMIZED) {
let sizeModeChanged = BrowserTestUtils.waitForEvent(win, "sizemodechange");
win.maximize();
await sizeModeChanged;
}
// Let the maximize settle and force a layout flush before measuring.
await win.promiseDocumentFlushed(() => {});
return win.windowState == win.STATE_MAXIMIZED;
}
async function withMaximizedWindow(
{ prefs = [], privateWindow = false, density = gUIDensity.MODE_NORMAL },
taskFn
) {
// Pin the density rather than relying on the default.
await SpecialPowers.pushPrefEnv({
set: [...prefs, ["browser.uidensity", density]],
});
let win = await BrowserTestUtils.openNewBrowserWindow({
private: privateWindow,
});
try {
win.gUIDensity?.update?.();
let maximized = await maximizeWindow(win);
if (!maximized) {
info(
`Window did not reach STATE_MAXIMIZED on this platform ` +
`(state=${win.windowState}); skipping assertions.`
);
ok(true, "maximize unsupported on this platform - skipped");
return;
}
await taskFn(win);
} finally {
await BrowserTestUtils.closeWindow(win);
await SpecialPowers.popPrefEnv();
}
}