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<!DOCTYPE html>
<html lang="{{ or site.Language.LanguageCode site.Language.Lang }}"
dir="{{ or site.Language.LanguageDirection `ltr` }}">
<head>
{{ partial "head.html" . }}
</head>
{{ $theme := "auto"}}
{{ with .Param "theme" }}
{{ $theme = .}}
{{ end }}
<body class="{{ $theme }}">
<div class="content">
<header>
<h1 class="center">
<a class="hover-underline" href="/">{{ .Site.Title }}</a>
</h1>
<hr>
</header>
<main class="main">
{{ block "main" . }}{{ end }}
</main>
</div>
</body>
<script>
function isAuto() {
return document.body.classList.contains("auto");
}
function setTheme() {
if (!isAuto()) {
return
}
document.body.classList.remove("auto");
let cls = "light";
if (window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches) {
cls = "dark";
}
document.body.classList.add(cls);
}
function invertBody() {
document.body.classList.toggle("dark");
document.body.classList.toggle("light");
}
if (isAuto()) {
window.matchMedia('(prefers-color-scheme: dark)').addListener(invertBody);
}
setTheme();
</script>
{{ if .HasShortcode "chords" }}
<script>
document.addEventListener("DOMContentLoaded", () => {
const semitones = ['C', 'C#', 'D', 'D#', 'E', 'F', 'F#', 'G', 'G#', 'A', 'A#', 'B'];
const flatToSharp = { 'Db': 'C#', 'Eb': 'D#', 'Gb': 'F#', 'Ab': 'G#', 'Bb': 'A#' };
function normalize(note) {
return flatToSharp[note] || note;
}
function transposeNote(note, shift) {
note = normalize(note);
const i = semitones.indexOf(note);
return i === -1 ? note : semitones[(i + shift + 12) % 12];
}
function transposeChord(fullChord, shift) {
const match = fullChord.match(/^([A-G][#b]?)([^\/]*)(?:\/([A-G][#b]?))?$/);
if (!match) return fullChord;
let [, root, suffix, bass] = match;
const transposedRoot = transposeNote(root, shift);
const transposedBass = bass ? transposeNote(bass, shift) : null;
return transposedRoot + suffix + (transposedBass ? `/${transposedBass}` : '');
}
function renderChords() {
const pattern = /\[([A-G][#b]?[^ \[\]]*)\]/g;
document.querySelectorAll('.chord-line').forEach(line => {
line.innerHTML = line.innerHTML.replace(pattern, (_, chord) => {
return `<span class="chord-anchor"><span class="chord" data-original="${chord}">${chord}</span></span>`;
});
});
}
function transposeToKey(fromKey, toKey) {
const fromIndex = semitones.indexOf(normalize(fromKey));
const toIndex = semitones.indexOf(normalize(toKey));
const shift = fromIndex === -1 || toIndex === -1 ? 0 : (toIndex - fromIndex + 12) % 12;
document.querySelectorAll('.chord').forEach(el => {
const original = el.dataset.original;
el.textContent = transposeChord(original, shift);
});
}
// Init
renderChords();
const selector = document.getElementById('key-selector');
const originalKey = selector?.dataset.originalKey || 'C';
// Trigger initial transpose to match the default selected key
transposeToKey(originalKey, selector.value);
selector?.addEventListener("change", () => {
transposeToKey(originalKey, selector.value);
});
});
document.addEventListener("DOMContentLoaded", () => {
const toggle = document.getElementById("toggle-chords");
toggle?.addEventListener("change", () => {
document.body.classList.toggle("hide-chords", !toggle.checked);
});
});
</script>
{{ end }}
</html>
|
