signal-desktop/sticker-creator/window/phase4-theme.ts

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// Copyright 2022 Signal Messenger, LLC
// SPDX-License-Identifier: AGPL-3.0-only
import { createSetting } from '../../ts/util/preload';
import { SignalContext } from '../../ts/windows/context';
const getThemeSetting = createSetting('themeSetting');
async function resolveTheme() {
const theme = (await getThemeSetting.getValue()) || 'system';
if (theme === 'system') {
return SignalContext.nativeThemeListener.getSystemTheme();
}
return theme;
}
async function applyTheme() {
window.document.body.classList.remove('dark-theme');
window.document.body.classList.remove('light-theme');
window.document.body.classList.add(`${await resolveTheme()}-theme`);
}
window.addEventListener('DOMContentLoaded', applyTheme);
SignalContext.nativeThemeListener.subscribe(() => applyTheme());