It is already setup for highlightjs as well, so remove the lines about github.css and zenburn_mod.css if you don't need it.
The only problem about this is that you will still get a white 0.1s refresh when switching pages in night mode.
Doxygen:
HTML_HEADER = style/header.html
#highlightjs
HTML_EXTRA_FILES = style/highlight.min.js style/lua.min.js
HTML_EXTRA_STYLESHEET += style/github.css
HTML_EXTRA_FILES += style/zenburn_mod.css
#daynight
HTML_EXTRA_STYLESHEET += style/doxygen_light.css
HTML_EXTRA_FILES += style/doxygen_night.css
header.html before </head>:
<!--DAY/NIGHT INSTALL BEGIN-->
<script>
function daynight_check() {
if (typeof(Storage) !== "undefined") {
if (localStorage.getItem("bgColor")=="night") {
night();
}
/*else if (localStorage.getItem("bgColor")=="day") {
day();
}*/
}
};
function changeCSS(cssFile, cssLinkIndex) {
var oldlink = document.getElementsByTagName("link").item(cssLinkIndex);
var newlink = document.createElement("link");
newlink.setAttribute("rel", "stylesheet");
newlink.setAttribute("type", "text/css");
newlink.setAttribute("href", cssFile);
document.getElementsByTagName("head").item(0).replaceChild(newlink, oldlink);
}
function changeCSS2(cssOLdFile, cssNewFile) {
var oldlink = document.getElementsByTagName("link");
for (i = 0; i < oldlink.length; i++) {
if (oldlink.item(i).getAttribute("href")==cssOLdFile) {
changeCSS(cssNewFile, i)
}
}
}
function day() {
changeCSS2("doxygen_night.css", "doxygen_light.css");
changeCSS2("zenburn_mod.css", "github.css");
if (typeof(Storage) !== "undefined") {
localStorage.setItem("bgColor", "day");
}
};
function night() {
changeCSS2("doxygen_light.css", "doxygen_night.css");
changeCSS2("github.css", "zenburn_mod.css");
if (typeof(Storage) !== "undefined") {
localStorage.setItem("bgColor", "night");
}
};
document.addEventListener('DOMContentLoaded', function() {
daynight_check();
}, false);
</script>
<!--DAY/NIGHT INSTALL END-->header.html after <body>:
<!--DAY/NIGHT INSTALL BEGIN-->
<input type="button" class="daynightbtn" onclick="day();" value="Day" />
<input type="button" class="daynightbtn" onclick="night();" value="Night" />
<!--DAY/NIGHT INSTALL END-->