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Dark mode support for HTML man pages #116

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merged 1 commit into from
Sep 29, 2024
Merged

Dark mode support for HTML man pages #116

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155 changes: 147 additions & 8 deletions man/docbook5-refentry-xslt/docbook5-refentry-to-html5.xsl
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Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,7 @@
<xsl:variable name="reference" select="document($dbk5.reference)/dbk:reference"/>

<xsl:template match="/">
<html>
<html data-color-scheme="light" data-fallback-color-scheme="light">
<xsl:apply-templates select="/dbk:*/@xml:lang"/>
<xsl:apply-templates select="node()"/>
</html>
Expand Down Expand Up @@ -79,11 +79,45 @@
</title>

<style type="text/css" media="screen"><![CDATA[
html[data-color-scheme=light] {
--bgcolor: #fff;
--pre-bgcolor: #ddd;
--pre-color: #000;
--main-color: #000;
--h1-color: #111;
--h2-color: #111;
--h3-color: #111;
--dt-color: #111;
--link-color: blue;
--vlink-color: purple;
--alink-color: red;
--hash-color: #aaa;
--hash-hover-color: #111;
--code-bgcolor: transparent;
}
html[data-color-scheme=dark] {
--bgcolor: #111;
--pre-bgcolor: #000;
--pre-color: lightgrey;
--main-color: lightgrey;
--h1-color: lightgrey;
--h2-color: lightgrey;
--h3-color: lightgrey;
--dt-color: lightgrey;
--link-color: lightblue;
--vlink-color: lightpink;
--alink-color: lightcoral;
--hash-color: grey;
--hash-hover-color: #fff;
--code-bgcolor: transparent;
}
html {
margin: 0;
padding: 0;
font-size: 18px; /* Set rem */
font-family: sans-serif;
background-color: var(--bgcolor);
color: var(--main-color);
}
body {
padding: 1rem 2rem;
Expand All @@ -104,7 +138,7 @@
line-height: 1.2em;
font-size: 2rem;
font-weight: bold;
color: #111;
color: var(--h1-color);
}
h1 code.manvolnum {
font-size: 70%;
Expand All @@ -119,13 +153,13 @@
line-height: 1.2em;
font-size: .9rem;
font-weight: 600;
color: #111;
color: var(--h2-color);
text-transform: uppercase;
}
dt {
margin-bottom: -.5rem;
font-weight: bold;
color: #111;
color: var(--dt-color);
}
dt .replaceable {
text-decoration: underline;
Expand All @@ -134,28 +168,133 @@
dd {
margin-bottom: 2em;
}
a:link {
color: var(--link-color);
}
a:visited {
color: var(--vlink-color);
}
a.hash-anchor {
margin-left: .5em;
color: #aaa;
color: var(--hash-color);
text-decoration: none;
font-weight: normal;
}
a.hash-anchor:hover {
text-decoration: underline;
color: #111;
color: var(--hash-hover-color);
}
code {
background-color: var(--code-bgcolor);
font-family: monospace;
font-weight: bold;
}
pre.monospaced, pre.cmdsynopsis {
background-color: #ddd;
font-family: monospace;
background-color: var(--pre-bgcolor);
padding: 2em 2em;
color: var(--pre-color);
font-family: monospace;
}

.color-scheme-switch {
position: fixed;
top: 0;
right: 0;

input {
display: none;
}
label {
margin: 0;
box-sizing: border-box;
display: inline-block;
position: relative;
height: 32px;
width: 32px;
font-size: 20px;
padding: 6px;
line-height: 20px;
cursor: pointer;
text-align: center;
}
input[value=""] + label {
background-color: transparent;
color: var(--main-color);
}
input[value=light] + label {
background-color: white;
color: black;
}
input[value=dark] + label {
background-color: black;
color: white;
}
input:checked + label::before {
content: '';
position: absolute;
bottom: -6px;
left: 12px;
width: 6px;
height: 6px;
border: 2px solid black;
border-radius: 50%;
background-color: white;
}
}
]]></style>
</head>
<body>
<nav class="color-scheme-switch" hidden="true">
<input type="radio" id="color-scheme-browser-default" checked="true" name="color-scheme" value=""/><label for="color-scheme-browser-default" title="Follow browser default">A</label>
<input type="radio" id="color-scheme-light" name="color-scheme" value="light"/><label for="color-scheme-light" title="Change to light theme">☀</label>
<input type="radio" id="color-scheme-dark" name="color-scheme" value="dark"/><label for="color-scheme-dark" title="Change to dark theme">⏾</label>
</nav>
<script><![CDATA[
function setColorScheme(colorScheme) {
if (!colorScheme) {
localStorage.removeItem('colorScheme');
}
else {
localStorage.setItem('colorScheme', colorScheme);
}

document.querySelector('html').dataset.colorScheme = getColorScheme();
}

function getColorScheme() {
const localValue = localStorage.getItem('colorScheme');
if (localValue !== null) {
return localValue;
}

console.log('A');

const browserValue = window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light';
if (browserValue !== null) {
return browserValue;
}
console.log('B');

return document.querySelector('html').dataset.fallbackColorScheme;
}

document.querySelectorAll('.color-scheme-switch').forEach(el => {
el.hidden = false;

window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', () => {
document.querySelector('html').dataset.colorScheme = getColorScheme();
});

el.querySelectorAll('input').forEach(input => {
if (input.checked) {
setColorScheme(input.value);
}
input.addEventListener('change', (event) => {
setColorScheme(event.target.value);
});
});
});
]]></script>
<article>
<xsl:apply-templates select="@xml:id"/>
<header>
Expand Down
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