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* Base JavaScript utilities for all Sphinx HTML documentation.

"use strict";

const BLACKLISTED_KEY_CONTROL_ELEMENTS = new Set([

"TEXTAREA",

"INPUT",

"SELECT",

"BUTTON",

]);

const _ready = (callback) => {

if (document.readyState !== "loading") {

callback();

} else {

document.addEventListener("DOMContentLoaded", callback);

}

};

/**

* Small JavaScript module for the documentation.

const Documentation = {

init: () => {

Documentation.initDomainIndexTable();

Documentation.initOnKeyListeners();

/**

* i18n support

TRANSLATIONS: {},

PLURAL_EXPR: (n) => (n === 1 ? 0 : 1),

LOCALE: "unknown",

// gettext and ngettext don't access this so that the functions

// can safely bound to a different name (_ = Documentation.gettext)

gettext: (string) => {

const translated = Documentation.TRANSLATIONS[string];

switch (typeof translated) {

case "undefined":

return string; // no translation

case "string":

return translated; // translation exists

default:

return translated[0]; // (singular, plural) translation tuple exists

}

ngettext: (singular, plural, n) => {

const translated = Documentation.TRANSLATIONS[singular];

if (typeof translated !== "undefined")

return translated[Documentation.PLURAL_EXPR(n)];

return n === 1 ? singular : plural;

addTranslations: (catalog) => {

Object.assign(Documentation.TRANSLATIONS, catalog.messages);

Documentation.PLURAL_EXPR = new Function(

"n",

`return (${catalog.plural_expr})`,

);

Documentation.LOCALE = catalog.locale;

/**

* helper function to focus on search bar

focusSearchBar: () => {

document.querySelectorAll("input[name=q]")[0]?.focus();

/**

* Initialise the domain index toggle buttons

initDomainIndexTable: () => {

const toggler = (el) => {

const idNumber = el.id.substr(7);

const toggledRows = document.querySelectorAll(`tr.cg-${idNumber}`);

if (el.src.substr(-9) === "minus.png") {

el.src = `${el.src.substr(0, el.src.length - 9)}plus.png`;

toggledRows.forEach((el) => (el.style.display = "none"));

} else {

el.src = `${el.src.substr(0, el.src.length - 8)}minus.png`;

toggledRows.forEach((el) => (el.style.display = ""));

}

};

const togglerElements = document.querySelectorAll("img.toggler");

togglerElements.forEach((el) =>

el.addEventListener("click", (event) => toggler(event.currentTarget)),

);

togglerElements.forEach((el) => (el.style.display = ""));

if (DOCUMENTATION_OPTIONS.COLLAPSE_INDEX) togglerElements.forEach(toggler);

initOnKeyListeners: () => {

// only install a listener if it is really needed

if (

!DOCUMENTATION_OPTIONS.NAVIGATION_WITH_KEYS

&& !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.altKey || event.ctrlKey || event.metaKey) return;

if (!event.shiftKey) {

switch (event.key) {

case "ArrowLeft":

if (!DOCUMENTATION_OPTIONS.NAVIGATION_WITH_KEYS) break;

const prevLink = document.querySelector('link[rel="prev"]');

if (prevLink && prevLink.href) {

window.location.href = prevLink.href;

event.preventDefault();

}

break;

case "ArrowRight":

if (!DOCUMENTATION_OPTIONS.NAVIGATION_WITH_KEYS) break;

const nextLink = document.querySelector('link[rel="next"]');

if (nextLink && nextLink.href) {

window.location.href = nextLink.href;

event.preventDefault();

}

break;

}

// some keyboard layouts may need Shift to get /

switch (event.key) {

case "/":

if (!DOCUMENTATION_OPTIONS.ENABLE_SEARCH_SHORTCUTS) break;

Documentation.focusSearchBar();

event.preventDefault();

}

});

};

// quick alias for translations

const _ = Documentation.gettext;

_ready(Documentation.init);

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