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/* Highlighting utilities for Sphinx HTML documentation. */

"use strict";

const SPHINX_HIGHLIGHT_ENABLED = true;

/**

* highlight a given string on a node by wrapping it in

* span elements with the given class name.

const _highlight = (node, addItems, text, className) => {

if (node.nodeType === Node.TEXT_NODE) {

const val = node.nodeValue;

const parent = node.parentNode;

const pos = val.toLowerCase().indexOf(text);

if (

pos >= 0

&& !parent.classList.contains(className)

&& !parent.classList.contains("nohighlight")

) {

let span;

const closestNode = parent.closest("body, svg, foreignObject");

const isInSVG = closestNode && closestNode.matches("svg");

if (isInSVG) {

span = document.createElementNS("http://www.w3.org/2000/svg", "tspan");

} else {

span = document.createElement("span");

span.classList.add(className);

}

span.appendChild(document.createTextNode(val.substr(pos, text.length)));

const rest = document.createTextNode(val.substr(pos + text.length));

parent.insertBefore(span, parent.insertBefore(rest, node.nextSibling));

node.nodeValue = val.substr(0, pos);

/* There may be more occurrences of search term in this node. So call this

* function recursively on the remaining fragment.

_highlight(rest, addItems, text, className);

if (isInSVG) {

const rect = document.createElementNS(

"http://www.w3.org/2000/svg",

"rect",

);

const bbox = parent.getBBox();

rect.x.baseVal.value = bbox.x;

rect.y.baseVal.value = bbox.y;

rect.width.baseVal.value = bbox.width;

rect.height.baseVal.value = bbox.height;

rect.setAttribute("class", className);

addItems.push({ parent: parent, target: rect });

}

} else if (node.matches && !node.matches("button, select, textarea")) {

node.childNodes.forEach((el) => _highlight(el, addItems, text, className));

}

};

const _highlightText = (thisNode, text, className) => {

let addItems = [];

_highlight(thisNode, addItems, text, className);

addItems.forEach((obj) =>

obj.parent.insertAdjacentElement("beforebegin", obj.target),

);

};

/**

* Small JavaScript module for the documentation.

const SphinxHighlight = {

/**

* highlight the search words provided in localstorage in the text

highlightSearchWords: () => {

if (!SPHINX_HIGHLIGHT_ENABLED) return; // bail if no highlight

// get and clear terms from localstorage

const url = new URL(window.location);

const highlight =

localStorage.getItem("sphinx_highlight_terms")

|| url.searchParams.get("highlight")

|| "";

localStorage.removeItem("sphinx_highlight_terms");

// Update history only if '?highlight' is present; otherwise it

// clears text fragments (not set in window.location by the browser)

if (url.searchParams.has("highlight")) {

url.searchParams.delete("highlight");

window.history.replaceState({}, "", url);

}

// get individual terms from highlight string

const terms = highlight

.toLowerCase()

.split(/\s+/)

.filter((x) => x);

if (terms.length === 0) return; // nothing to do

// There should never be more than one element matching "div.body"

const divBody = document.querySelectorAll("div.body");

const body = divBody.length ? divBody[0] : document.querySelector("body");

window.setTimeout(() => {

terms.forEach((term) => _highlightText(body, term, "highlighted"));

}, 10);

const searchBox = document.getElementById("searchbox");

if (searchBox === null) return;

searchBox.appendChild(

document

.createRange()

.createContextualFragment(

'<p class="highlight-link">'

+ '<a href="javascript:SphinxHighlight.hideSearchWords()">'

+ _("Hide Search Matches")

+ "</a></p>",

);

/**

* helper function to hide the search marks again

hideSearchWords: () => {

document

.querySelectorAll("#searchbox .highlight-link")

.forEach((el) => el.remove());

document

.querySelectorAll("span.highlighted")

.forEach((el) => el.classList.remove("highlighted"));

localStorage.removeItem("sphinx_highlight_terms");

initEscapeListener: () => {

// only install a listener if it is really needed

if (!DOCUMENTATION_OPTIONS.ENABLE_SEARCH_SHORTCUTS) return;

document.addEventListener("keydown", (event) => {

// bail for input elements

if (BLACKLISTED_KEY_CONTROL_ELEMENTS.has(document.activeElement.tagName))

return;

// bail with special keys

if (event.shiftKey || event.altKey || event.ctrlKey || event.metaKey)

return;

if (

DOCUMENTATION_OPTIONS.ENABLE_SEARCH_SHORTCUTS

&& event.key === "Escape"

) {

SphinxHighlight.hideSearchWords();

event.preventDefault();

}

});

};

_ready(() => {

/* Do not call highlightSearchWords() when we are on the search page.

* It will highlight words from the *previous* search query.

if (typeof Search === "undefined") SphinxHighlight.highlightSearchWords();

SphinxHighlight.initEscapeListener();

});

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