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<?xml version="1.0"?>
<!-- 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
<window id="system_font_changes_window"
width="300"
height="300"
onload="start();">
<span id="target" style="font:menu">Hello world</span>
<script type="application/javascript"><![CDATA[
function is(condition, message) {
window.arguments[0].SimpleTest.is(condition, message);
}
function registerCleanupFunction(func) {
window.arguments[0].SimpleTest.registerCleanupFunction(func);
}
async function waitForFrame() {
return new Promise(resolve => {
requestAnimationFrame(resolve);
});
}
let windowUtils = window.windowUtils;
async function start() {
await waitForFrame();
const originalSystemFont = windowUtils.systemFont;
registerCleanupFunction(() => {
windowUtils.systemFont = originalSystemFont;
});
windowUtils.systemFont = 'Sans 11';
is(windowUtils.systemFont, 'Sans 11');
// Wait for two frames for the safety since the notification for system
// font changes is asynchronously processed.
await waitForFrame();
await waitForFrame();
const target = document.getElementById('target');
is(getComputedStyle(target).fontFamily, 'Sans');
windowUtils.systemFont = 'Serif 11';
is(windowUtils.systemFont, 'Serif 11');
await waitForFrame();
await waitForFrame();
is(getComputedStyle(target).fontFamily, 'Serif');
window.close();
window.arguments[0].SimpleTest.finish();
}
]]></script>
</window>