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js code rewrite. Themes rewritten, bugs fixed

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This commit is contained in:
meow 2022-05-15 08:38:46 +03:00
parent f06d5b973b
commit fd66084388
4 changed files with 46 additions and 74 deletions
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82
assets/js/themes.js
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@ -2,58 +2,39 @@
var toggle_theme = document.getElementById('toggle_theme');
toggle_theme.href = 'javascript:void(0)';
const STORAGE_KEY_THEME = 'dark_mode';
const THEME_DARK = 'dark';
const THEME_LIGHT = 'light';
const THEME_SYSTEM = '';
// TODO: theme state controlled by system
toggle_theme.addEventListener('click', function () {
var dark_mode = document.body.classList.contains('light-theme');
set_mode(dark_mode);
helpers.storage.set('dark_mode', dark_mode ? 'dark' : 'light');
const isDarkTheme = helpers.storage.get(STORAGE_KEY_THEME) === THEME_DARK;
setTheme(isDarkTheme ? THEME_LIGHT : THEME_DARK);
helpers.xhr('GET', '/toggle_theme?redirect=false', {}, {});
});
// Handles theme change event caused by other tab
addEventListener('storage', function (e) {
if (e.key === 'dark_mode') {
update_mode(e.newValue);
}
});
addEventListener('DOMContentLoaded', function () {
const dark_mode = document.getElementById('dark_mode_pref').textContent;
// Update storage if dark mode preference changed on preferences page
helpers.storage.set('dark_mode', dark_mode);
update_mode(dark_mode);
// Ask system about dark theme
var systemDarkTheme = matchMedia('(prefers-color-scheme: dark)');
systemDarkTheme.addListener(function () {
// Ignore system events if theme set manually
if (!helpers.storage.get(STORAGE_KEY_THEME))
setTheme(THEME_SYSTEM);
});
var darkScheme = matchMedia('(prefers-color-scheme: dark)');
var lightScheme = matchMedia('(prefers-color-scheme: light)');
/** @param {THEME_DARK|THEME_LIGHT|THEME_SYSTEM} theme */
function setTheme(theme) {
if (theme !== THEME_SYSTEM)
helpers.storage.set(STORAGE_KEY_THEME, theme);
darkScheme.addListener(scheme_switch);
lightScheme.addListener(scheme_switch);
function scheme_switch (e) {
// ignore this method if we have a preference set
if (helpers.storage.get('dark_mode')) return;
if (!e.matches) return;
if (e.media.includes('dark')) {
set_mode(true);
} else if (e.media.includes('light')) {
set_mode(false);
}
}
function set_mode (bool) {
if (bool) {
// dark
if (theme === THEME_DARK || (theme === THEME_SYSTEM && systemDarkTheme.matches)) {
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');
@ -61,18 +42,13 @@ function set_mode (bool) {
}
}
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 === '' && 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)
}
// Handles theme change event caused by other tab
addEventListener('storage', function (e) {
if (e.key === STORAGE_KEY_THEME) setTheme(e.newValue);
});
// Set theme from preferences on page load
addEventListener('DOMContentLoaded', function () {
const prefTheme = document.getElementById('dark_mode_pref').textContent;
setTheme(prefTheme);
});