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/*
* Copyright (C) 2022 Red Hat, Inc.
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
function debug(...args: unknown[]) {
if (window.debugging == "all" || window.debugging?.includes("style")) {
console.debug([`cockpit-dark-theme: ${document.documentElement.id}:`, ...args].join(" "));
}
}
function changeDarkThemeClass(documentElement: Element, dark_mode: boolean) {
debug(`Setting cockpit theme to ${dark_mode ? "dark" : "light"}`);
if (dark_mode) {
documentElement.classList.add('pf-v6-theme-dark');
} else {
documentElement.classList.remove('pf-v6-theme-dark');
}
}
function _setDarkMode(_style?: string) {
const style = _style || localStorage.getItem('shell:style') || 'auto';
let dark_mode;
// If a user set's an explicit theme, ignore system changes.
if ((window.matchMedia?.('(prefers-color-scheme: dark)').matches && style === "auto") || style === "dark") {
dark_mode = true;
} else {
dark_mode = false;
}
changeDarkThemeClass(document.documentElement, dark_mode);
}
window.addEventListener("storage", event => {
if (event.key === "shell:style") {
debug(`Storage element 'shell:style' changed from ${event.oldValue} to ${event.newValue}`);
_setDarkMode();
}
});
// When changing the theme from the shell switcher the localstorage change will not fire for the same page (aka shell)
// so we need to listen for the event on the window object.
window.addEventListener("cockpit-style", event => {
if (event instanceof CustomEvent) {
const style = event.detail.style;
debug(`Event received from shell with 'cockpit-style' ${style}`);
_setDarkMode(style);
}
});
window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', () => {
debug(`Operating system theme preference changed to ${window.matchMedia?.('(prefers-color-scheme: dark)').matches ? "dark" : "light"}`);
_setDarkMode();
});
_setDarkMode();
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