// SPDX-License-Identifier: MIT
/**
Doxygen Awesome
https://github.com/jothepro/doxygen-awesome-css
Copyright (c) 2021 - 2025 jothepro
*/
class DoxygenAwesomeDarkModeToggle extends HTMLElement {
// SVG icons from https://fonts.google.com/icons
// Licensed under the Apache 2.0 license:
// https://www.apache.org/licenses/LICENSE-2.0.html
static lightModeIcon = ``
static darkModeIcon = ``
static title = "Toggle Light/Dark Mode"
static prefersLightModeInDarkModeKey = "prefers-light-mode-in-dark-mode"
static prefersDarkModeInLightModeKey = "prefers-dark-mode-in-light-mode"
static _staticConstructor = function() {
DoxygenAwesomeDarkModeToggle.enableDarkMode(DoxygenAwesomeDarkModeToggle.userPreference)
// Update the color scheme when the browsers preference changes
// without user interaction on the website.
window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', event => {
DoxygenAwesomeDarkModeToggle.onSystemPreferenceChanged()
})
// Update the color scheme when the tab is made visible again.
// It is possible that the appearance was changed in another tab
// while this tab was in the background.
document.addEventListener("visibilitychange", visibilityState => {
if (document.visibilityState === 'visible') {
DoxygenAwesomeDarkModeToggle.onSystemPreferenceChanged()
}
});
}()
static init() {
const toggleSelector = 'doxygen-awesome-dark-mode-toggle'
const existingToggle = document.querySelector(toggleSelector)
const toggleButton = existingToggle || document.createElement(toggleSelector)
if (!existingToggle) {
toggleButton.title = DoxygenAwesomeDarkModeToggle.title
toggleButton.updateIcon()
window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', () => {
toggleButton.updateIcon()
})
document.addEventListener("visibilitychange", () => {
if (document.visibilityState === 'visible') {
toggleButton.updateIcon()
}
});
}
const moveToggle = () => {
const searchBox = document.getElementById("MSearchBox")
const toggle = document.querySelector(toggleSelector) || toggleButton
if (searchBox && searchBox.parentNode !== toggle.parentNode) {
searchBox.parentNode.appendChild(toggle)
}
}
const containsSearchBox = node => {
return node.nodeType === Node.ELEMENT_NODE &&
(node.id === "MSearchBox" || node.querySelector("#MSearchBox") !== null)
}
const observer = new MutationObserver(mutations => {
const searchBoxChanged = mutations.some(mutation =>
[...mutation.addedNodes, ...mutation.removedNodes]
.some(containsSearchBox)
)
if (searchBoxChanged) {
moveToggle()
}
})
observer.observe(document.documentElement, { childList: true, subtree: true })
moveToggle()
}
constructor() {
super();
this.onclick=this.toggleDarkMode
}
/**
* @returns `true` for dark-mode, `false` for light-mode system preference
*/
static get systemPreference() {
return window.matchMedia('(prefers-color-scheme: dark)').matches
}
/**
* @returns `true` for dark-mode, `false` for light-mode user preference
*/
static get userPreference() {
return (!DoxygenAwesomeDarkModeToggle.systemPreference && localStorage.getItem(DoxygenAwesomeDarkModeToggle.prefersDarkModeInLightModeKey)) ||
(DoxygenAwesomeDarkModeToggle.systemPreference && !localStorage.getItem(DoxygenAwesomeDarkModeToggle.prefersLightModeInDarkModeKey))
}
static set userPreference(userPreference) {
DoxygenAwesomeDarkModeToggle.darkModeEnabled = userPreference
if(!userPreference) {
if(DoxygenAwesomeDarkModeToggle.systemPreference) {
localStorage.setItem(DoxygenAwesomeDarkModeToggle.prefersLightModeInDarkModeKey, true)
} else {
localStorage.removeItem(DoxygenAwesomeDarkModeToggle.prefersDarkModeInLightModeKey)
}
} else {
if(!DoxygenAwesomeDarkModeToggle.systemPreference) {
localStorage.setItem(DoxygenAwesomeDarkModeToggle.prefersDarkModeInLightModeKey, true)
} else {
localStorage.removeItem(DoxygenAwesomeDarkModeToggle.prefersLightModeInDarkModeKey)
}
}
DoxygenAwesomeDarkModeToggle.onUserPreferenceChanged()
}
static enableDarkMode(enable) {
if(enable) {
DoxygenAwesomeDarkModeToggle.darkModeEnabled = true
document.documentElement.classList.add("dark-mode")
document.documentElement.classList.remove("light-mode")
} else {
DoxygenAwesomeDarkModeToggle.darkModeEnabled = false
document.documentElement.classList.remove("dark-mode")
document.documentElement.classList.add("light-mode")
}
}
static onSystemPreferenceChanged() {
DoxygenAwesomeDarkModeToggle.darkModeEnabled = DoxygenAwesomeDarkModeToggle.userPreference
DoxygenAwesomeDarkModeToggle.enableDarkMode(DoxygenAwesomeDarkModeToggle.darkModeEnabled)
}
static onUserPreferenceChanged() {
DoxygenAwesomeDarkModeToggle.enableDarkMode(DoxygenAwesomeDarkModeToggle.darkModeEnabled)
}
toggleDarkMode() {
DoxygenAwesomeDarkModeToggle.userPreference = !DoxygenAwesomeDarkModeToggle.userPreference
this.updateIcon()
}
updateIcon() {
if(DoxygenAwesomeDarkModeToggle.darkModeEnabled) {
this.innerHTML = DoxygenAwesomeDarkModeToggle.darkModeIcon
} else {
this.innerHTML = DoxygenAwesomeDarkModeToggle.lightModeIcon
}
}
}
customElements.define("doxygen-awesome-dark-mode-toggle", DoxygenAwesomeDarkModeToggle);