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<div id="quarto-content" class="page-columns page-rows-contents page-layout-article">
<main class="content" id="quarto-document-content">
<section id="pmoaudio" class="level1">
<h1>PMOAudio</h1>
<p>Pipeline audio stéréo async optimisé pour Rust, utilisant Tokio.</p>
<section id="caractéristiques" class="level2">
<h2 class="anchored" data-anchor-id="caractéristiques">Caractéristiques</h2>
<ul>
<li><strong>Pipeline push-based async</strong> : Tous les nodes utilisent Tokio pour un traitement non-bloquant</li>
<li><strong>Zero-copy optimisé</strong> : Les données audio sont partagées via <code>Arc&lt;Vec&lt;f32&gt;&gt;</code> pour éviter les clonages inutiles</li>
<li><strong>Support multiroom</strong> : BufferNode avec buffer circulaire et offsets indépendants par abonné</li>
<li><strong>TimerNode</strong> : Calcul de position temporelle en temps réel</li>
<li><strong>Backpressure</strong> : Channels bounded avec <code>try_send</code> pour éviter les blocages</li>
</ul>
</section>
<section id="architecture" class="level2">
<h2 class="anchored" data-anchor-id="architecture">Architecture</h2>
<section id="audiochunk" class="level3">
<h3 class="anchored" data-anchor-id="audiochunk">AudioChunk</h3>
<p>Structure de données pour un chunk audio stéréo :</p>
<div class="sourceCode" id="cb1"><pre class="sourceCode rust code-with-copy"><code class="sourceCode rust"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="kw">pub</span> <span class="kw">struct</span> AudioChunk <span class="op">{</span></span>
<span id="cb1-2"><a href="#cb1-2" aria-hidden="true" tabindex="-1"></a> <span class="kw">pub</span> order<span class="op">:</span> <span class="dt">u64</span><span class="op">,</span> <span class="co">// Numéro d'ordre</span></span>
<span id="cb1-3"><a href="#cb1-3" aria-hidden="true" tabindex="-1"></a> <span class="kw">pub</span> left<span class="op">:</span> Arc<span class="op">&lt;</span><span class="dt">Vec</span><span class="op">&lt;</span><span class="dt">f32</span><span class="op">&gt;&gt;,</span> <span class="co">// Canal gauche (partagé)</span></span>
<span id="cb1-4"><a href="#cb1-4" aria-hidden="true" tabindex="-1"></a> <span class="kw">pub</span> right<span class="op">:</span> Arc<span class="op">&lt;</span><span class="dt">Vec</span><span class="op">&lt;</span><span class="dt">f32</span><span class="op">&gt;&gt;,</span> <span class="co">// Canal droit (partagé)</span></span>
<span id="cb1-5"><a href="#cb1-5" aria-hidden="true" tabindex="-1"></a> <span class="kw">pub</span> sample_rate<span class="op">:</span> <span class="dt">u32</span><span class="op">,</span> <span class="co">// Taux d'échantillonnage</span></span>
<span id="cb1-6"><a href="#cb1-6" aria-hidden="true" tabindex="-1"></a><span class="op">}</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<p>Les données sont wrappées dans <code>Arc</code> pour permettre le partage sans copie entre plusieurs abonnés.</p>
</section>
<section id="nodes" class="level3">
<h3 class="anchored" data-anchor-id="nodes">Nodes</h3>
<section id="singlesubscribernode" class="level4">
<h4 class="anchored" data-anchor-id="singlesubscribernode">SingleSubscriberNode</h4>
<ul>
<li>Un seul abonné</li>
<li>Pas de clone inutile du Arc</li>
</ul>
</section>
<section id="multisubscribernode" class="level4">
<h4 class="anchored" data-anchor-id="multisubscribernode">MultiSubscriberNode</h4>
<ul>
<li>Plusieurs abonnés</li>
<li>Partage le même <code>Arc&lt;AudioChunk&gt;</code> avec tous</li>
</ul>
</section>
<section id="sourcenode" class="level4">
<h4 class="anchored" data-anchor-id="sourcenode">SourceNode</h4>
<ul>
<li>Génère ou lit des chunks audio</li>
<li>Version mock avec génération de sinusoïdes pour tests</li>
</ul>
</section>
<section id="decodernode" class="level4">
<h4 class="anchored" data-anchor-id="decodernode">DecoderNode</h4>
<ul>
<li>Décode les chunks audio</li>
<li>Supporte le passthrough et le resampling (mock)</li>
</ul>
</section>
<section id="dspnode" class="level4">
<h4 class="anchored" data-anchor-id="dspnode">DspNode</h4>
<ul>
<li>Applique des transformations DSP</li>
<li>Clone les données uniquement si modification nécessaire</li>
<li>Exemple : gain, filtrage</li>
</ul>
</section>
<section id="buffernode" class="level4">
<h4 class="anchored" data-anchor-id="buffernode">BufferNode</h4>
<ul>
<li>Buffer circulaire (<code>VecDeque&lt;Arc&lt;AudioChunk&gt;&gt;</code>)</li>
<li>Support multiroom avec offsets indépendants</li>
<li><code>try_send</code> non-bloquant pour éviter de bloquer la source</li>
</ul>
</section>
<section id="timernode" class="level4">
<h4 class="anchored" data-anchor-id="timernode">TimerNode</h4>
<ul>
<li>Node passthrough qui ne modifie pas les données</li>
<li>Incrémente un compteur de samples</li>
<li>Calcule la position : <code>position_sec = elapsed_samples / sample_rate</code></li>
<li>Fournit un <code>TimerHandle</code> pour monitoring</li>
</ul>
</section>
<section id="sinknode" class="level4">
<h4 class="anchored" data-anchor-id="sinknode">SinkNode</h4>
<ul>
<li>Node terminal qui consomme les chunks</li>
<li>Versions : silent, logging, stats, mock file writer</li>
</ul>
</section>
</section>
</section>
<section id="pipeline-type" class="level2">
<h2 class="anchored" data-anchor-id="pipeline-type">Pipeline type</h2>
<pre><code>SourceNode → DecoderNode → DSPNode → BufferNode → TimerNode → SinkNode(s)
↓
Multiroom Sinks
(avec offsets)</code></pre>
</section>
<section id="exemples" class="level2">
<h2 class="anchored" data-anchor-id="exemples">Exemples</h2>
<section id="pipeline-simple" class="level3">
<h3 class="anchored" data-anchor-id="pipeline-simple">Pipeline simple</h3>
<div class="sourceCode" id="cb3"><pre class="sourceCode rust code-with-copy"><code class="sourceCode rust"><span id="cb3-1"><a href="#cb3-1" aria-hidden="true" tabindex="-1"></a><span class="kw">use</span> <span class="pp">pmoaudio::</span><span class="op">{</span>SinkNode<span class="op">,</span> SourceNode<span class="op">,</span> TimerNode<span class="op">};</span></span>
<span id="cb3-2"><a href="#cb3-2" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb3-3"><a href="#cb3-3" aria-hidden="true" tabindex="-1"></a><span class="at">#[</span><span class="pp">tokio::</span>main<span class="at">]</span></span>
<span id="cb3-4"><a href="#cb3-4" aria-hidden="true" tabindex="-1"></a><span class="kw">async</span> <span class="kw">fn</span> main() <span class="op">{</span></span>
<span id="cb3-5"><a href="#cb3-5" aria-hidden="true" tabindex="-1"></a> <span class="kw">let</span> (<span class="kw">mut</span> timer<span class="op">,</span> timer_tx) <span class="op">=</span> <span class="pp">TimerNode::</span>new(<span class="dv">10</span>)<span class="op">;</span></span>
<span id="cb3-6"><a href="#cb3-6" aria-hidden="true" tabindex="-1"></a> <span class="kw">let</span> (sink<span class="op">,</span> sink_tx) <span class="op">=</span> <span class="pp">SinkNode::</span>new(<span class="st">"Output"</span><span class="op">.</span>to_string()<span class="op">,</span> <span class="dv">10</span>)<span class="op">;</span></span>
<span id="cb3-7"><a href="#cb3-7" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb3-8"><a href="#cb3-8" aria-hidden="true" tabindex="-1"></a> timer<span class="op">.</span>add_subscriber(sink_tx)<span class="op">;</span></span>
<span id="cb3-9"><a href="#cb3-9" aria-hidden="true" tabindex="-1"></a> <span class="kw">let</span> timer_handle <span class="op">=</span> timer<span class="op">.</span>get_position_handle()<span class="op">;</span></span>
<span id="cb3-10"><a href="#cb3-10" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb3-11"><a href="#cb3-11" aria-hidden="true" tabindex="-1"></a> <span class="pp">tokio::</span>spawn(<span class="kw">async</span> <span class="kw">move</span> <span class="op">{</span> timer<span class="op">.</span>run()<span class="op">.</span><span class="kw">await</span><span class="op">.</span>unwrap() <span class="op">}</span>)<span class="op">;</span></span>
<span id="cb3-12"><a href="#cb3-12" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb3-13"><a href="#cb3-13" aria-hidden="true" tabindex="-1"></a> <span class="kw">let</span> sink_handle <span class="op">=</span> <span class="pp">tokio::</span>spawn(<span class="kw">async</span> <span class="kw">move</span> <span class="op">{</span></span>
<span id="cb3-14"><a href="#cb3-14" aria-hidden="true" tabindex="-1"></a> sink<span class="op">.</span>run_with_stats()<span class="op">.</span><span class="kw">await</span><span class="op">.</span>unwrap()</span>
<span id="cb3-15"><a href="#cb3-15" aria-hidden="true" tabindex="-1"></a> <span class="op">}</span>)<span class="op">;</span></span>
<span id="cb3-16"><a href="#cb3-16" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb3-17"><a href="#cb3-17" aria-hidden="true" tabindex="-1"></a> <span class="pp">tokio::</span>spawn(<span class="kw">async</span> <span class="kw">move</span> <span class="op">{</span></span>
<span id="cb3-18"><a href="#cb3-18" aria-hidden="true" tabindex="-1"></a> <span class="kw">let</span> <span class="kw">mut</span> source <span class="op">=</span> <span class="pp">SourceNode::</span>new()<span class="op">;</span></span>
<span id="cb3-19"><a href="#cb3-19" aria-hidden="true" tabindex="-1"></a> source<span class="op">.</span>add_subscriber(timer_tx)<span class="op">;</span></span>
<span id="cb3-20"><a href="#cb3-20" aria-hidden="true" tabindex="-1"></a> source<span class="op">.</span>generate_chunks(<span class="dv">30</span><span class="op">,</span> <span class="dv">4800</span><span class="op">,</span> <span class="dv">48000</span><span class="op">,</span> <span class="dv">440.0</span>)<span class="op">.</span><span class="kw">await</span><span class="op">.</span>unwrap()<span class="op">;</span></span>
<span id="cb3-21"><a href="#cb3-21" aria-hidden="true" tabindex="-1"></a> <span class="op">}</span>)<span class="op">;</span></span>
<span id="cb3-22"><a href="#cb3-22" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb3-23"><a href="#cb3-23" aria-hidden="true" tabindex="-1"></a> sink_handle<span class="op">.</span><span class="kw">await</span><span class="op">.</span>unwrap()<span class="op">;</span></span>
<span id="cb3-24"><a href="#cb3-24" aria-hidden="true" tabindex="-1"></a><span class="op">}</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</section>
<section id="multiroom" class="level3">
<h3 class="anchored" data-anchor-id="multiroom">Multiroom</h3>
<div class="sourceCode" id="cb4"><pre class="sourceCode rust code-with-copy"><code class="sourceCode rust"><span id="cb4-1"><a href="#cb4-1" aria-hidden="true" tabindex="-1"></a><span class="kw">let</span> (buffer<span class="op">,</span> buffer_tx) <span class="op">=</span> <span class="pp">BufferNode::</span>new(<span class="dv">50</span><span class="op">,</span> <span class="dv">10</span>)<span class="op">;</span></span>
<span id="cb4-2"><a href="#cb4-2" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb4-3"><a href="#cb4-3" aria-hidden="true" tabindex="-1"></a><span class="kw">let</span> (sink1<span class="op">,</span> sink1_tx) <span class="op">=</span> <span class="pp">SinkNode::</span>new(<span class="st">"Room 1"</span><span class="op">.</span>to_string()<span class="op">,</span> <span class="dv">10</span>)<span class="op">;</span></span>
<span id="cb4-4"><a href="#cb4-4" aria-hidden="true" tabindex="-1"></a><span class="kw">let</span> (sink2<span class="op">,</span> sink2_tx) <span class="op">=</span> <span class="pp">SinkNode::</span>new(<span class="st">"Room 2"</span><span class="op">.</span>to_string()<span class="op">,</span> <span class="dv">10</span>)<span class="op">;</span></span>
<span id="cb4-5"><a href="#cb4-5" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb4-6"><a href="#cb4-6" aria-hidden="true" tabindex="-1"></a>buffer<span class="op">.</span>add_subscriber_with_offset(sink1_tx<span class="op">,</span> <span class="dv">0</span>)<span class="op">.</span><span class="kw">await</span><span class="op">;</span> <span class="co">// Pas de délai</span></span>
<span id="cb4-7"><a href="#cb4-7" aria-hidden="true" tabindex="-1"></a>buffer<span class="op">.</span>add_subscriber_with_offset(sink2_tx<span class="op">,</span> <span class="dv">5</span>)<span class="op">.</span><span class="kw">await</span><span class="op">;</span> <span class="co">// 5 chunks de retard</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</section>
</section>
<section id="lancer-les-exemples" class="level2">
<h2 class="anchored" data-anchor-id="lancer-les-exemples">Lancer les exemples</h2>
<div class="sourceCode" id="cb5"><pre class="sourceCode bash code-with-copy"><code class="sourceCode bash"><span id="cb5-1"><a href="#cb5-1" aria-hidden="true" tabindex="-1"></a><span class="co"># Pipeline simple</span></span>
<span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a><span class="ex">cargo</span> run <span class="at">--example</span> simple_pipeline</span>
<span id="cb5-3"><a href="#cb5-3" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb5-4"><a href="#cb5-4" aria-hidden="true" tabindex="-1"></a><span class="co"># Pipeline complet avec tous les nodes</span></span>
<span id="cb5-5"><a href="#cb5-5" aria-hidden="true" tabindex="-1"></a><span class="ex">cargo</span> run <span class="at">--example</span> pipeline_demo</span>
<span id="cb5-6"><a href="#cb5-6" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb5-7"><a href="#cb5-7" aria-hidden="true" tabindex="-1"></a><span class="co"># Configuration multiroom</span></span>
<span id="cb5-8"><a href="#cb5-8" aria-hidden="true" tabindex="-1"></a><span class="ex">cargo</span> run <span class="at">--example</span> multiroom_demo</span>
<span id="cb5-9"><a href="#cb5-9" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb5-10"><a href="#cb5-10" aria-hidden="true" tabindex="-1"></a><span class="co"># Streaming avec timing réel</span></span>
<span id="cb5-11"><a href="#cb5-11" aria-hidden="true" tabindex="-1"></a><span class="ex">cargo</span> run <span class="at">--example</span> streaming_demo</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</section>
<section id="tests" class="level2">
<h2 class="anchored" data-anchor-id="tests">Tests</h2>
<div class="sourceCode" id="cb6"><pre class="sourceCode bash code-with-copy"><code class="sourceCode bash"><span id="cb6-1"><a href="#cb6-1" aria-hidden="true" tabindex="-1"></a><span class="ex">cargo</span> test</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<p>20 tests unitaires couvrant : - Propagation des chunks - Calcul de position par TimerNode - BufferNode multi-abonné avec offsets - Arc sharing et zero-copy - DSP avec gain et filtrage - Resampling</p>
</section>
<section id="optimisations" class="level2">
<h2 class="anchored" data-anchor-id="optimisations">Optimisations</h2>
<ol type="1">
<li><strong>Arc sharing</strong> : Les <code>AudioChunk</code> sont clonés via <code>Arc::clone()</code> qui ne clone que le pointeur</li>
<li><strong>Copy-on-Write</strong> : Les DSP nodes clonent les données uniquement si modification nécessaire</li>
<li><strong>Bounded channels</strong> : Backpressure automatique</li>
<li><strong>try_send</strong> : Non-bloquant pour BufferNode, permet de sauter des chunks si un abonné est saturé</li>
<li><strong>RwLock</strong> : Pour partage concurrent du compteur TimerNode</li>
</ol>
</section>
<section id="dépendances" class="level2">
<h2 class="anchored" data-anchor-id="dépendances">Dépendances</h2>
<ul>
<li><code>tokio</code> : Runtime async et channels</li>
<li><code>async-trait</code> : Traits async</li>
</ul>
</section>
<section id="license" class="level2">
<h2 class="anchored" data-anchor-id="license">License</h2>
<p>CeCill-2.0</p>
</section>
</section>
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return filterRegex.test(href) || localhostRegex.test(href) || mailtoRegex.test(href);
}
// Inspect non-navigation links and adorn them if external
var links = window.document.querySelectorAll('a[href]:not(.nav-link):not(.navbar-brand):not(.toc-action):not(.sidebar-link):not(.sidebar-item-toggle):not(.pagination-link):not(.no-external):not([aria-hidden]):not(.dropdown-item):not(.quarto-navigation-tool):not(.about-link)');
for (var i=0; i<links.length; i++) {
const link = links[i];
if (!isInternal(link.href)) {
// undo the damage that might have been done by quarto-nav.js in the case of
// links that we want to consider external
if (link.dataset.originalHref !== undefined) {
link.href = link.dataset.originalHref;
}
}
}
function tippyHover(el, contentFn, onTriggerFn, onUntriggerFn) {
const config = {
allowHTML: true,
maxWidth: 500,
delay: 100,
arrow: false,
appendTo: function(el) {
return el.parentElement;
},
interactive: true,
interactiveBorder: 10,
theme: 'quarto',
placement: 'bottom-start',
};
if (contentFn) {
config.content = contentFn;
}
if (onTriggerFn) {
config.onTrigger = onTriggerFn;
}
if (onUntriggerFn) {
config.onUntrigger = onUntriggerFn;
}
window.tippy(el, config);
}
const noterefs = window.document.querySelectorAll('a[role="doc-noteref"]');
for (var i=0; i<noterefs.length; i++) {
const ref = noterefs[i];
tippyHover(ref, function() {
// use id or data attribute instead here
let href = ref.getAttribute('data-footnote-href') || ref.getAttribute('href');
try { href = new URL(href).hash; } catch {}
const id = href.replace(/^#\/?/, "");
const note = window.document.getElementById(id);
if (note) {
return note.innerHTML;
} else {
return "";
}
});
}
const xrefs = window.document.querySelectorAll('a.quarto-xref');
const processXRef = (id, note) => {
// Strip column container classes
const stripColumnClz = (el) => {
el.classList.remove("page-full", "page-columns");
if (el.children) {
for (const child of el.children) {
stripColumnClz(child);
}
}
}
stripColumnClz(note)
if (id === null || id.startsWith('sec-')) {
// Special case sections, only their first couple elements
const container = document.createElement("div");
if (note.children && note.children.length > 2) {
container.appendChild(note.children[0].cloneNode(true));
for (let i = 1; i < note.children.length; i++) {
const child = note.children[i];
if (child.tagName === "P" && child.innerText === "") {
continue;
} else {
container.appendChild(child.cloneNode(true));
break;
}
}
if (window.Quarto?.typesetMath) {
window.Quarto.typesetMath(container);
}
return container.innerHTML
} else {
if (window.Quarto?.typesetMath) {
window.Quarto.typesetMath(note);
}
return note.innerHTML;
}
} else {
// Remove any anchor links if they are present
const anchorLink = note.querySelector('a.anchorjs-link');
if (anchorLink) {
anchorLink.remove();
}
if (window.Quarto?.typesetMath) {
window.Quarto.typesetMath(note);
}
if (note.classList.contains("callout")) {
return note.outerHTML;
} else {
return note.innerHTML;
}
}
}
for (var i=0; i<xrefs.length; i++) {
const xref = xrefs[i];
tippyHover(xref, undefined, function(instance) {
instance.disable();
let url = xref.getAttribute('href');
let hash = undefined;
if (url.startsWith('#')) {
hash = url;
} else {
try { hash = new URL(url).hash; } catch {}
}
if (hash) {
const id = hash.replace(/^#\/?/, "");
const note = window.document.getElementById(id);
if (note !== null) {
try {
const html = processXRef(id, note.cloneNode(true));
instance.setContent(html);
} finally {
instance.enable();
instance.show();
}
} else {
// See if we can fetch this
fetch(url.split('#')[0])
.then(res => res.text())
.then(html => {
const parser = new DOMParser();
const htmlDoc = parser.parseFromString(html, "text/html");
const note = htmlDoc.getElementById(id);
if (note !== null) {
const html = processXRef(id, note);
instance.setContent(html);
}
}).finally(() => {
instance.enable();
instance.show();
});
}
} else {
// See if we can fetch a full url (with no hash to target)
// This is a special case and we should probably do some content thinning / targeting
fetch(url)
.then(res => res.text())
.then(html => {
const parser = new DOMParser();
const htmlDoc = parser.parseFromString(html, "text/html");
const note = htmlDoc.querySelector('main.content');
if (note !== null) {
// This should only happen for chapter cross references
// (since there is no id in the URL)
// remove the first header
if (note.children.length > 0 && note.children[0].tagName === "HEADER") {
note.children[0].remove();
}
const html = processXRef(null, note);
instance.setContent(html);
}
}).finally(() => {
instance.enable();
instance.show();
});
}
}, function(instance) {
});
}
let selectedAnnoteEl;
const selectorForAnnotation = ( cell, annotation) => {
let cellAttr = 'data-code-cell="' + cell + '"';
let lineAttr = 'data-code-annotation="' + annotation + '"';
const selector = 'span[' + cellAttr + '][' + lineAttr + ']';
return selector;
}
const selectCodeLines = (annoteEl) => {
const doc = window.document;
const targetCell = annoteEl.getAttribute("data-target-cell");
const targetAnnotation = annoteEl.getAttribute("data-target-annotation");
const annoteSpan = window.document.querySelector(selectorForAnnotation(targetCell, targetAnnotation));
const lines = annoteSpan.getAttribute("data-code-lines").split(",");
const lineIds = lines.map((line) => {
return targetCell + "-" + line;
})
let top = null;
let height = null;
let parent = null;
if (lineIds.length > 0) {
//compute the position of the single el (top and bottom and make a div)
const el = window.document.getElementById(lineIds[0]);
top = el.offsetTop;
height = el.offsetHeight;
parent = el.parentElement.parentElement;
if (lineIds.length > 1) {
const lastEl = window.document.getElementById(lineIds[lineIds.length - 1]);
const bottom = lastEl.offsetTop + lastEl.offsetHeight;
height = bottom - top;
}
if (top !== null && height !== null && parent !== null) {
// cook up a div (if necessary) and position it
let div = window.document.getElementById("code-annotation-line-highlight");
if (div === null) {
div = window.document.createElement("div");
div.setAttribute("id", "code-annotation-line-highlight");
div.style.position = 'absolute';
parent.appendChild(div);
}
div.style.top = top - 2 + "px";
div.style.height = height + 4 + "px";
div.style.left = 0;
let gutterDiv = window.document.getElementById("code-annotation-line-highlight-gutter");
if (gutterDiv === null) {
gutterDiv = window.document.createElement("div");
gutterDiv.setAttribute("id", "code-annotation-line-highlight-gutter");
gutterDiv.style.position = 'absolute';
const codeCell = window.document.getElementById(targetCell);
const gutter = codeCell.querySelector('.code-annotation-gutter');
gutter.appendChild(gutterDiv);
}
gutterDiv.style.top = top - 2 + "px";
gutterDiv.style.height = height + 4 + "px";
}
selectedAnnoteEl = annoteEl;
}
};
const unselectCodeLines = () => {
const elementsIds = ["code-annotation-line-highlight", "code-annotation-line-highlight-gutter"];
elementsIds.forEach((elId) => {
const div = window.document.getElementById(elId);
if (div) {
div.remove();
}
});
selectedAnnoteEl = undefined;
};
// Handle positioning of the toggle
window.addEventListener(
"resize",
throttle(() => {
elRect = undefined;
if (selectedAnnoteEl) {
selectCodeLines(selectedAnnoteEl);
}
}, 10)
);
function throttle(fn, ms) {
let throttle = false;
let timer;
return (...args) => {
if(!throttle) { // first call gets through
fn.apply(this, args);
throttle = true;
} else { // all the others get throttled
if(timer) clearTimeout(timer); // cancel #2
timer = setTimeout(() => {
fn.apply(this, args);
timer = throttle = false;
}, ms);
}
};
}
// Attach click handler to the DT
const annoteDls = window.document.querySelectorAll('dt[data-target-cell]');
for (const annoteDlNode of annoteDls) {
annoteDlNode.addEventListener('click', (event) => {
const clickedEl = event.target;
if (clickedEl !== selectedAnnoteEl) {
unselectCodeLines();
const activeEl = window.document.querySelector('dt[data-target-cell].code-annotation-active');
if (activeEl) {
activeEl.classList.remove('code-annotation-active');
}
selectCodeLines(clickedEl);
clickedEl.classList.add('code-annotation-active');
} else {
// Unselect the line
unselectCodeLines();
clickedEl.classList.remove('code-annotation-active');
}
});
}
const findCites = (el) => {
const parentEl = el.parentElement;
if (parentEl) {
const cites = parentEl.dataset.cites;
if (cites) {
return {
el,
cites: cites.split(' ')
};
} else {
return findCites(el.parentElement)
}
} else {
return undefined;
}
};
var bibliorefs = window.document.querySelectorAll('a[role="doc-biblioref"]');
for (var i=0; i<bibliorefs.length; i++) {
const ref = bibliorefs[i];
const citeInfo = findCites(ref);
if (citeInfo) {
tippyHover(citeInfo.el, function() {
var popup = window.document.createElement('div');
citeInfo.cites.forEach(function(cite) {
var citeDiv = window.document.createElement('div');
citeDiv.classList.add('hanging-indent');
citeDiv.classList.add('csl-entry');
var biblioDiv = window.document.getElementById('ref-' + cite);
if (biblioDiv) {
citeDiv.innerHTML = biblioDiv.innerHTML;
}
popup.appendChild(citeDiv);
});
return popup.innerHTML;
});
}
}
});
</script>
</div> <!-- /content -->
</body></html>
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