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move the style switcher to the a separate .js file

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Signed-off-by: Brian S. Stephan <bss@incorporeal.org>
This commit is contained in:
Brian S. Stephan 2025-03-17 09:08:10 -05:00
parent d52fc4df9a
commit 5b17041b66
Signed by: bss
GPG Key ID: 3DE06D3180895FCB
2 changed files with 60 additions and 42 deletions
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59
incorporealcms/static/js/style_switcher.js Normal file
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@ -0,0 +1,59 @@
/**
* Allow the user to change their desired styles dynamically despite the site being static.
*
* Loathe as I am to use JavaScript, this style selection is one of my favorite parts
* of my CMS, so I want to keep it around even in the static site.
*
* SPDX-FileCopyrightText: © 2025 Brian S. Stephan <bss@incorporeal.org>
* SPDX-License-Identifier: GPL-3.0-only
*/
/**
* Disable all stylesheets except the one to apply, the user style.
*/
function applyStyle(styleName) {
var i, link_tag;
for (i = 0, link_tag = document.getElementsByTagName("link"); i < link_tag.length; i++ ) {
// find the stylesheets with titles, meaning they can be disabled/enabled
if ((link_tag[i].rel.indexOf("stylesheet") != -1) && link_tag[i].title) {
link_tag[i].disabled = true;
if (link_tag[i].title == styleName) {
link_tag[i].disabled = false ;
}
}
}
}
/**
* Set a cookie indicating the selected user style, and then switch to it.
*/
function setStyle(styleName) {
document.cookie = "user-style=" + encodeURIComponent(styleName) +
"; max-age=31536000;domain=" + window.location.hostname + ";path=/";
applyStyle(styleName);
}
/**
* Read the user's cookie, if they have one, and try to set the style to the one specified.
*/
function applyStyleFromCookie() {
// get the user style cookie and set that specified style as the active one
var styleName = getCookie("user-style");
if (styleName) {
applyStyle(styleName);
}
}
/**
* Get the user style cookie.
*/
function getCookie(cookieName) {
// find the desired cookie from the document's cookie(s) string
let matches = document.cookie.match(new RegExp(
"(?:^|; )" + cookieName.replace(/([\.$?*|{}\(\)\[\]\\\/\+^])/g, '\\$1') + "=([^;]*)"
));
return matches ? decodeURIComponent(matches[1]) : undefined;
}
// auto apply the style on load
applyStyleFromCookie();

43
incorporealcms/templates/base.html
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@ -18,48 +18,7 @@ SPDX-License-Identifier: GPL-3.0-only
<link rel="icon" href="{{ config.FAVICON }}"> <link rel="icon" href="{{ config.FAVICON }}">
<link rel="alternate" type="application/atom+xml" href="/feed/atom"> <link rel="alternate" type="application/atom+xml" href="/feed/atom">
<link rel="alternate" type="application/rss+xml" href="/feed/rss"> <link rel="alternate" type="application/rss+xml" href="/feed/rss">
<script type="text/javascript"> <script type="text/javascript" src="/static/js/style_switcher.js"></script>
// loathe as I am to use JavaScript, this style selection is one of my favorite parts
// of my CMS, so I want to keep it around even in the static site
function applyStyle(styleName) {
// disable all stylesheets except the one to apply, the user style
var i, link_tag;
for (i = 0, link_tag = document.getElementsByTagName("link"); i < link_tag.length; i++ ) {
// find the stylesheets with titles, meaning they can be disabled/enabled
if ((link_tag[i].rel.indexOf("stylesheet") != -1) && link_tag[i].title) {
link_tag[i].disabled = true;
if (link_tag[i].title == styleName) {
link_tag[i].disabled = false ;
}
}
}
}
function setStyle(styleName) {
document.cookie = "user-style=" + encodeURIComponent(styleName) +
"; max-age=31536000;domain={{ config.DOMAIN_NAME }};path=/";
applyStyle(styleName);
}
function applyStyleFromCookie() {
// get the user style cookie and set that specified style as the active one
var styleName = getCookie("user-style");
if (styleName) {
applyStyle(styleName);
}
}
function getCookie(cookieName) {
// find the desired cookie from the document's cookie(s) string
let matches = document.cookie.match(new RegExp(
"(?:^|; )" + cookieName.replace(/([\.$?*|{}\(\)\[\]\\\/\+^])/g, '\\$1') + "=([^;]*)"
));
return matches ? decodeURIComponent(matches[1]) : undefined;
}
applyStyleFromCookie();
</script>
<div {% block site_class %}class="site-wrap site-wrap-normal-width"{% endblock %}> <div {% block site_class %}class="site-wrap site-wrap-normal-width"{% endblock %}>
{% block header %} {% block header %}