93 lines
2.9 KiB
JavaScript
93 lines
2.9 KiB
JavaScript
'use strict';
|
|
var toggle_theme = document.getElementById('toggle_theme');
|
|
toggle_theme.href = 'javascript:void(0);';
|
|
|
|
toggle_theme.addEventListener('click', function () {
|
|
var dark_mode = document.body.classList.contains('light-theme');
|
|
|
|
var url = '/toggle_theme?redirect=false';
|
|
var xhr = new XMLHttpRequest();
|
|
xhr.responseType = 'json';
|
|
xhr.timeout = 10000;
|
|
xhr.open('GET', url, true);
|
|
|
|
set_mode(dark_mode);
|
|
try {
|
|
window.localStorage.setItem('dark_mode', dark_mode ? 'dark' : 'light');
|
|
} catch {}
|
|
|
|
xhr.send();
|
|
});
|
|
|
|
window.addEventListener('storage', function (e) {
|
|
if (e.key === 'dark_mode') {
|
|
update_mode(e.newValue);
|
|
}
|
|
});
|
|
|
|
window.addEventListener('DOMContentLoaded', function () {
|
|
const dark_mode = document.getElementById('dark_mode_pref').textContent;
|
|
try {
|
|
// Update localStorage if dark mode preference changed on preferences page
|
|
window.localStorage.setItem('dark_mode', dark_mode);
|
|
} catch {}
|
|
update_mode(dark_mode);
|
|
});
|
|
|
|
|
|
var darkScheme = window.matchMedia('(prefers-color-scheme: dark)');
|
|
var lightScheme = window.matchMedia('(prefers-color-scheme: light)');
|
|
|
|
darkScheme.addListener(scheme_switch);
|
|
lightScheme.addListener(scheme_switch);
|
|
|
|
function scheme_switch (e) {
|
|
// ignore this method if we have a preference set
|
|
try {
|
|
if (localStorage.getItem('dark_mode')) {
|
|
return;
|
|
}
|
|
} catch {}
|
|
if (e.matches) {
|
|
if (e.media.includes('dark')) {
|
|
set_mode(true);
|
|
} else if (e.media.includes('light')) {
|
|
set_mode(false);
|
|
}
|
|
}
|
|
}
|
|
|
|
function set_mode (bool) {
|
|
if (bool) {
|
|
// dark
|
|
toggle_theme.children[0].setAttribute('class', 'icon ion-ios-sunny');
|
|
document.body.classList.remove('no-theme');
|
|
document.body.classList.remove('light-theme');
|
|
document.body.classList.add('dark-theme');
|
|
} else {
|
|
// light
|
|
toggle_theme.children[0].setAttribute('class', 'icon ion-ios-moon');
|
|
document.body.classList.remove('no-theme');
|
|
document.body.classList.remove('dark-theme');
|
|
document.body.classList.add('light-theme');
|
|
}
|
|
}
|
|
|
|
function update_mode (mode) {
|
|
if (mode === 'true' /* for backwards compatibility */ || mode === 'dark') {
|
|
// If preference for dark mode indicated
|
|
set_mode(true);
|
|
}
|
|
else if (mode === 'false' /* for backwards compatibility */ || mode === 'light') {
|
|
// If preference for light mode indicated
|
|
set_mode(false);
|
|
}
|
|
else if (document.getElementById('dark_mode_pref').textContent === '' && window.matchMedia('(prefers-color-scheme: dark)').matches) {
|
|
// If no preference indicated here and no preference indicated on the preferences page (backend), but the browser tells us that the operating system has a dark theme
|
|
set_mode(true);
|
|
}
|
|
// else do nothing, falling back to the mode defined by the `dark_mode` preference on the preferences page (backend)
|
|
}
|
|
|
|
|