1290 lines
48 KiB
JavaScript
1290 lines
48 KiB
JavaScript
// Local js definitions:
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/* global addClass, getSettingValue, hasClass, searchState */
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/* global onEach, onEachLazy, removeClass, getVar */
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"use strict";
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// The amount of time that the cursor must remain still over a hover target before
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// revealing a tooltip.
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//
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// https://www.nngroup.com/articles/timing-exposing-content/
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window.RUSTDOC_TOOLTIP_HOVER_MS = 300;
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window.RUSTDOC_TOOLTIP_HOVER_EXIT_MS = 450;
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// Given a basename (e.g. "storage") and an extension (e.g. ".js"), return a URL
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// for a resource under the root-path, with the resource-suffix.
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function resourcePath(basename, extension) {
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return getVar("root-path") + basename + getVar("resource-suffix") + extension;
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}
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function hideMain() {
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addClass(document.getElementById(MAIN_ID), "hidden");
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}
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function showMain() {
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removeClass(document.getElementById(MAIN_ID), "hidden");
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}
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function elemIsInParent(elem, parent) {
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while (elem && elem !== document.body) {
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if (elem === parent) {
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return true;
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}
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elem = elem.parentElement;
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}
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return false;
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}
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function blurHandler(event, parentElem, hideCallback) {
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if (!elemIsInParent(document.activeElement, parentElem) &&
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!elemIsInParent(event.relatedTarget, parentElem)
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) {
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hideCallback();
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}
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}
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window.rootPath = getVar("root-path");
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window.currentCrate = getVar("current-crate");
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function setMobileTopbar() {
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// FIXME: It would be nicer to generate this text content directly in HTML,
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// but with the current code it's hard to get the right information in the right place.
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const mobileLocationTitle = document.querySelector(".mobile-topbar h2");
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const locationTitle = document.querySelector(".sidebar h2.location");
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if (mobileLocationTitle && locationTitle) {
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mobileLocationTitle.innerHTML = locationTitle.innerHTML;
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}
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}
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// Gets the human-readable string for the virtual-key code of the
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// given KeyboardEvent, ev.
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//
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// This function is meant as a polyfill for KeyboardEvent#key,
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// since it is not supported in IE 11 or Chrome for Android. We also test for
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// KeyboardEvent#keyCode because the handleShortcut handler is
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// also registered for the keydown event, because Blink doesn't fire
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// keypress on hitting the Escape key.
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//
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// So I guess you could say things are getting pretty interoperable.
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function getVirtualKey(ev) {
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if ("key" in ev && typeof ev.key !== "undefined") {
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return ev.key;
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}
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const c = ev.charCode || ev.keyCode;
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if (c === 27) {
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return "Escape";
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}
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return String.fromCharCode(c);
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}
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const MAIN_ID = "main-content";
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const SETTINGS_BUTTON_ID = "settings-menu";
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const ALTERNATIVE_DISPLAY_ID = "alternative-display";
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const NOT_DISPLAYED_ID = "not-displayed";
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const HELP_BUTTON_ID = "help-button";
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function getSettingsButton() {
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return document.getElementById(SETTINGS_BUTTON_ID);
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}
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function getHelpButton() {
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return document.getElementById(HELP_BUTTON_ID);
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}
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// Returns the current URL without any query parameter or hash.
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function getNakedUrl() {
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return window.location.href.split("?")[0].split("#")[0];
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}
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/**
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* This function inserts `newNode` after `referenceNode`. It doesn't work if `referenceNode`
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* doesn't have a parent node.
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*
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* @param {HTMLElement} newNode
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* @param {HTMLElement} referenceNode
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*/
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function insertAfter(newNode, referenceNode) {
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referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling);
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}
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/**
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* This function creates a new `<section>` with the given `id` and `classes` if it doesn't already
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* exist.
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*
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* More information about this in `switchDisplayedElement` documentation.
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*
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* @param {string} id
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* @param {string} classes
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*/
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function getOrCreateSection(id, classes) {
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let el = document.getElementById(id);
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if (!el) {
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el = document.createElement("section");
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el.id = id;
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el.className = classes;
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insertAfter(el, document.getElementById(MAIN_ID));
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}
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return el;
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}
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/**
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* Returns the `<section>` element which contains the displayed element.
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*
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* @return {HTMLElement}
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*/
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function getAlternativeDisplayElem() {
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return getOrCreateSection(ALTERNATIVE_DISPLAY_ID, "content hidden");
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}
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/**
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* Returns the `<section>` element which contains the not-displayed elements.
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*
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* @return {HTMLElement}
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*/
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function getNotDisplayedElem() {
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return getOrCreateSection(NOT_DISPLAYED_ID, "hidden");
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}
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/**
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* To nicely switch between displayed "extra" elements (such as search results or settings menu)
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* and to alternate between the displayed and not displayed elements, we hold them in two different
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* `<section>` elements. They work in pair: one holds the hidden elements while the other
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* contains the displayed element (there can be only one at the same time!). So basically, we switch
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* elements between the two `<section>` elements.
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*
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* @param {HTMLElement} elemToDisplay
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*/
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function switchDisplayedElement(elemToDisplay) {
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const el = getAlternativeDisplayElem();
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if (el.children.length > 0) {
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getNotDisplayedElem().appendChild(el.firstElementChild);
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}
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if (elemToDisplay === null) {
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addClass(el, "hidden");
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showMain();
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return;
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}
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el.appendChild(elemToDisplay);
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hideMain();
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removeClass(el, "hidden");
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}
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function browserSupportsHistoryApi() {
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return window.history && typeof window.history.pushState === "function";
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}
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function loadCss(cssUrl) {
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const link = document.createElement("link");
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link.href = cssUrl;
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link.rel = "stylesheet";
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document.getElementsByTagName("head")[0].appendChild(link);
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}
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function preLoadCss(cssUrl) {
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// https://developer.mozilla.org/en-US/docs/Web/HTML/Link_types/preload
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const link = document.createElement("link");
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link.href = cssUrl;
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link.rel = "preload";
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link.as = "style";
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document.getElementsByTagName("head")[0].appendChild(link);
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}
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(function() {
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const isHelpPage = window.location.pathname.endsWith("/help.html");
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function loadScript(url) {
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const script = document.createElement("script");
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script.src = url;
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document.head.append(script);
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}
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getSettingsButton().onclick = event => {
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if (event.ctrlKey || event.altKey || event.metaKey) {
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return;
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}
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window.hideAllModals(false);
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addClass(getSettingsButton(), "rotate");
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event.preventDefault();
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// Sending request for the CSS and the JS files at the same time so it will
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// hopefully be loaded when the JS will generate the settings content.
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loadCss(getVar("static-root-path") + getVar("settings-css"));
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loadScript(getVar("static-root-path") + getVar("settings-js"));
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preLoadCss(getVar("static-root-path") + getVar("theme-light-css"));
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preLoadCss(getVar("static-root-path") + getVar("theme-dark-css"));
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preLoadCss(getVar("static-root-path") + getVar("theme-ayu-css"));
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// Pre-load all theme CSS files, so that switching feels seamless.
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//
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// When loading settings.html as a standalone page, the equivalent HTML is
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// generated in context.rs.
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setTimeout(() => {
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const themes = getVar("themes").split(",");
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for (const theme of themes) {
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// if there are no themes, do nothing
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// "".split(",") == [""]
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if (theme !== "") {
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preLoadCss(getVar("root-path") + theme + ".css");
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}
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}
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}, 0);
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};
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window.searchState = {
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loadingText: "Loading search results...",
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input: document.getElementsByClassName("search-input")[0],
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outputElement: () => {
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let el = document.getElementById("search");
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if (!el) {
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el = document.createElement("section");
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el.id = "search";
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getNotDisplayedElem().appendChild(el);
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}
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return el;
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},
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title: document.title,
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titleBeforeSearch: document.title,
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timeout: null,
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// On the search screen, so you remain on the last tab you opened.
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//
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// 0 for "In Names"
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// 1 for "In Parameters"
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// 2 for "In Return Types"
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currentTab: 0,
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// tab and back preserves the element that was focused.
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focusedByTab: [null, null, null],
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clearInputTimeout: () => {
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if (searchState.timeout !== null) {
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clearTimeout(searchState.timeout);
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searchState.timeout = null;
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}
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},
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isDisplayed: () => searchState.outputElement().parentElement.id === ALTERNATIVE_DISPLAY_ID,
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// Sets the focus on the search bar at the top of the page
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focus: () => {
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searchState.input.focus();
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},
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// Removes the focus from the search bar.
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defocus: () => {
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searchState.input.blur();
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},
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showResults: search => {
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if (search === null || typeof search === "undefined") {
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search = searchState.outputElement();
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}
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switchDisplayedElement(search);
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searchState.mouseMovedAfterSearch = false;
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document.title = searchState.title;
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},
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removeQueryParameters: () => {
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// We change the document title.
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document.title = searchState.titleBeforeSearch;
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if (browserSupportsHistoryApi()) {
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history.replaceState(null, "", getNakedUrl() + window.location.hash);
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}
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},
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hideResults: () => {
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switchDisplayedElement(null);
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// We also remove the query parameter from the URL.
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searchState.removeQueryParameters();
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},
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getQueryStringParams: () => {
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const params = {};
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window.location.search.substring(1).split("&").
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map(s => {
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const pair = s.split("=");
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params[decodeURIComponent(pair[0])] =
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typeof pair[1] === "undefined" ? null : decodeURIComponent(pair[1]);
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});
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return params;
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},
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setup: () => {
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const search_input = searchState.input;
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if (!searchState.input) {
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return;
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}
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let searchLoaded = false;
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function loadSearch() {
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if (!searchLoaded) {
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searchLoaded = true;
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loadScript(getVar("static-root-path") + getVar("search-js"));
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loadScript(resourcePath("search-index", ".js"));
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}
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}
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search_input.addEventListener("focus", () => {
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search_input.origPlaceholder = search_input.placeholder;
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search_input.placeholder = "Type your search here.";
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loadSearch();
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});
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if (search_input.value !== "") {
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loadSearch();
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}
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const params = searchState.getQueryStringParams();
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if (params.search !== undefined) {
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searchState.setLoadingSearch();
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loadSearch();
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}
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},
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setLoadingSearch: () => {
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const search = searchState.outputElement();
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search.innerHTML = "<h3 class=\"search-loading\">" + searchState.loadingText + "</h3>";
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searchState.showResults(search);
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},
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};
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const toggleAllDocsId = "toggle-all-docs";
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let savedHash = "";
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function handleHashes(ev) {
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if (ev !== null && searchState.isDisplayed() && ev.newURL) {
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// This block occurs when clicking on an element in the navbar while
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// in a search.
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switchDisplayedElement(null);
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const hash = ev.newURL.slice(ev.newURL.indexOf("#") + 1);
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if (browserSupportsHistoryApi()) {
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// `window.location.search`` contains all the query parameters, not just `search`.
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history.replaceState(null, "",
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getNakedUrl() + window.location.search + "#" + hash);
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}
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const elem = document.getElementById(hash);
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if (elem) {
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elem.scrollIntoView();
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}
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}
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// This part is used in case an element is not visible.
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const pageId = window.location.hash.replace(/^#/, "");
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if (savedHash !== pageId) {
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savedHash = pageId;
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if (pageId !== "") {
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expandSection(pageId);
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}
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}
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}
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function onHashChange(ev) {
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// If we're in mobile mode, we should hide the sidebar in any case.
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hideSidebar();
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handleHashes(ev);
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}
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function openParentDetails(elem) {
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while (elem) {
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if (elem.tagName === "DETAILS") {
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elem.open = true;
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}
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elem = elem.parentNode;
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}
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}
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function expandSection(id) {
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openParentDetails(document.getElementById(id));
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}
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function handleEscape(ev) {
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searchState.clearInputTimeout();
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searchState.hideResults();
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ev.preventDefault();
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searchState.defocus();
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window.hideAllModals(true); // true = reset focus for tooltips
|
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}
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function handleShortcut(ev) {
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// Don't interfere with browser shortcuts
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const disableShortcuts = getSettingValue("disable-shortcuts") === "true";
|
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if (ev.ctrlKey || ev.altKey || ev.metaKey || disableShortcuts) {
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return;
|
||
}
|
||
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if (document.activeElement.tagName === "INPUT" &&
|
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document.activeElement.type !== "checkbox" &&
|
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document.activeElement.type !== "radio") {
|
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switch (getVirtualKey(ev)) {
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case "Escape":
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handleEscape(ev);
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break;
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}
|
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} else {
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switch (getVirtualKey(ev)) {
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case "Escape":
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handleEscape(ev);
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break;
|
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|
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case "s":
|
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case "S":
|
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ev.preventDefault();
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searchState.focus();
|
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break;
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case "+":
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ev.preventDefault();
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expandAllDocs();
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break;
|
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case "-":
|
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ev.preventDefault();
|
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collapseAllDocs();
|
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break;
|
||
|
||
case "?":
|
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showHelp();
|
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break;
|
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|
||
default:
|
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break;
|
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}
|
||
}
|
||
}
|
||
|
||
document.addEventListener("keypress", handleShortcut);
|
||
document.addEventListener("keydown", handleShortcut);
|
||
|
||
function addSidebarItems() {
|
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if (!window.SIDEBAR_ITEMS) {
|
||
return;
|
||
}
|
||
const sidebar = document.getElementsByClassName("sidebar-elems")[0];
|
||
|
||
/**
|
||
* Append to the sidebar a "block" of links - a heading along with a list (`<ul>`) of items.
|
||
*
|
||
* @param {string} shortty - A short type name, like "primitive", "mod", or "macro"
|
||
* @param {string} id - The HTML id of the corresponding section on the module page.
|
||
* @param {string} longty - A long, capitalized, plural name, like "Primitive Types",
|
||
* "Modules", or "Macros".
|
||
*/
|
||
function block(shortty, id, longty) {
|
||
const filtered = window.SIDEBAR_ITEMS[shortty];
|
||
if (!filtered) {
|
||
return;
|
||
}
|
||
|
||
const h3 = document.createElement("h3");
|
||
h3.innerHTML = `<a href="index.html#${id}">${longty}</a>`;
|
||
const ul = document.createElement("ul");
|
||
ul.className = "block " + shortty;
|
||
|
||
for (const name of filtered) {
|
||
let path;
|
||
if (shortty === "mod") {
|
||
path = name + "/index.html";
|
||
} else {
|
||
path = shortty + "." + name + ".html";
|
||
}
|
||
const current_page = document.location.href.split("/").pop();
|
||
const link = document.createElement("a");
|
||
link.href = path;
|
||
if (path === current_page) {
|
||
link.className = "current";
|
||
}
|
||
link.textContent = name;
|
||
const li = document.createElement("li");
|
||
li.appendChild(link);
|
||
ul.appendChild(li);
|
||
}
|
||
sidebar.appendChild(h3);
|
||
sidebar.appendChild(ul);
|
||
}
|
||
|
||
if (sidebar) {
|
||
block("primitive", "primitives", "Primitive Types");
|
||
block("mod", "modules", "Modules");
|
||
block("macro", "macros", "Macros");
|
||
block("struct", "structs", "Structs");
|
||
block("enum", "enums", "Enums");
|
||
block("union", "unions", "Unions");
|
||
block("constant", "constants", "Constants");
|
||
block("static", "static", "Statics");
|
||
block("trait", "traits", "Traits");
|
||
block("fn", "functions", "Functions");
|
||
block("type", "types", "Type Definitions");
|
||
block("foreigntype", "foreign-types", "Foreign Types");
|
||
block("keyword", "keywords", "Keywords");
|
||
block("traitalias", "trait-aliases", "Trait Aliases");
|
||
}
|
||
}
|
||
|
||
window.register_implementors = imp => {
|
||
const implementors = document.getElementById("implementors-list");
|
||
const synthetic_implementors = document.getElementById("synthetic-implementors-list");
|
||
const inlined_types = new Set();
|
||
|
||
const TEXT_IDX = 0;
|
||
const SYNTHETIC_IDX = 1;
|
||
const TYPES_IDX = 2;
|
||
|
||
if (synthetic_implementors) {
|
||
// This `inlined_types` variable is used to avoid having the same implementation
|
||
// showing up twice. For example "String" in the "Sync" doc page.
|
||
//
|
||
// By the way, this is only used by and useful for traits implemented automatically
|
||
// (like "Send" and "Sync").
|
||
onEachLazy(synthetic_implementors.getElementsByClassName("impl"), el => {
|
||
const aliases = el.getAttribute("data-aliases");
|
||
if (!aliases) {
|
||
return;
|
||
}
|
||
aliases.split(",").forEach(alias => {
|
||
inlined_types.add(alias);
|
||
});
|
||
});
|
||
}
|
||
|
||
let currentNbImpls = implementors.getElementsByClassName("impl").length;
|
||
const traitName = document.querySelector(".main-heading h1 > .trait").textContent;
|
||
const baseIdName = "impl-" + traitName + "-";
|
||
const libs = Object.getOwnPropertyNames(imp);
|
||
// We don't want to include impls from this JS file, when the HTML already has them.
|
||
// The current crate should always be ignored. Other crates that should also be
|
||
// ignored are included in the attribute `data-ignore-extern-crates`.
|
||
const script = document
|
||
.querySelector("script[data-ignore-extern-crates]");
|
||
const ignoreExternCrates = new Set(
|
||
(script ? script.getAttribute("data-ignore-extern-crates") : "").split(",")
|
||
);
|
||
for (const lib of libs) {
|
||
if (lib === window.currentCrate || ignoreExternCrates.has(lib)) {
|
||
continue;
|
||
}
|
||
const structs = imp[lib];
|
||
|
||
struct_loop:
|
||
for (const struct of structs) {
|
||
const list = struct[SYNTHETIC_IDX] ? synthetic_implementors : implementors;
|
||
|
||
// The types list is only used for synthetic impls.
|
||
// If this changes, `main.js` and `write_shared.rs` both need changed.
|
||
if (struct[SYNTHETIC_IDX]) {
|
||
for (const struct_type of struct[TYPES_IDX]) {
|
||
if (inlined_types.has(struct_type)) {
|
||
continue struct_loop;
|
||
}
|
||
inlined_types.add(struct_type);
|
||
}
|
||
}
|
||
|
||
const code = document.createElement("h3");
|
||
code.innerHTML = struct[TEXT_IDX];
|
||
addClass(code, "code-header");
|
||
|
||
onEachLazy(code.getElementsByTagName("a"), elem => {
|
||
const href = elem.getAttribute("href");
|
||
|
||
if (href && !/^(?:[a-z+]+:)?\/\//.test(href)) {
|
||
elem.setAttribute("href", window.rootPath + href);
|
||
}
|
||
});
|
||
|
||
const currentId = baseIdName + currentNbImpls;
|
||
const anchor = document.createElement("a");
|
||
anchor.href = "#" + currentId;
|
||
addClass(anchor, "anchor");
|
||
|
||
const display = document.createElement("div");
|
||
display.id = currentId;
|
||
addClass(display, "impl");
|
||
display.appendChild(anchor);
|
||
display.appendChild(code);
|
||
list.appendChild(display);
|
||
currentNbImpls += 1;
|
||
}
|
||
}
|
||
};
|
||
if (window.pending_implementors) {
|
||
window.register_implementors(window.pending_implementors);
|
||
}
|
||
|
||
function addSidebarCrates() {
|
||
if (!window.ALL_CRATES) {
|
||
return;
|
||
}
|
||
const sidebarElems = document.getElementsByClassName("sidebar-elems")[0];
|
||
if (!sidebarElems) {
|
||
return;
|
||
}
|
||
// Draw a convenient sidebar of known crates if we have a listing
|
||
const h3 = document.createElement("h3");
|
||
h3.innerHTML = "Crates";
|
||
const ul = document.createElement("ul");
|
||
ul.className = "block crate";
|
||
|
||
for (const crate of window.ALL_CRATES) {
|
||
const link = document.createElement("a");
|
||
link.href = window.rootPath + crate + "/index.html";
|
||
if (window.rootPath !== "./" && crate === window.currentCrate) {
|
||
link.className = "current";
|
||
}
|
||
link.textContent = crate;
|
||
|
||
const li = document.createElement("li");
|
||
li.appendChild(link);
|
||
ul.appendChild(li);
|
||
}
|
||
sidebarElems.appendChild(h3);
|
||
sidebarElems.appendChild(ul);
|
||
}
|
||
|
||
function expandAllDocs() {
|
||
const innerToggle = document.getElementById(toggleAllDocsId);
|
||
removeClass(innerToggle, "will-expand");
|
||
onEachLazy(document.getElementsByClassName("toggle"), e => {
|
||
if (!hasClass(e, "type-contents-toggle") && !hasClass(e, "more-examples-toggle")) {
|
||
e.open = true;
|
||
}
|
||
});
|
||
innerToggle.title = "collapse all docs";
|
||
innerToggle.children[0].innerText = "\u2212"; // "\u2212" is "−" minus sign
|
||
}
|
||
|
||
function collapseAllDocs() {
|
||
const innerToggle = document.getElementById(toggleAllDocsId);
|
||
addClass(innerToggle, "will-expand");
|
||
onEachLazy(document.getElementsByClassName("toggle"), e => {
|
||
if (e.parentNode.id !== "implementations-list" ||
|
||
(!hasClass(e, "implementors-toggle") &&
|
||
!hasClass(e, "type-contents-toggle"))
|
||
) {
|
||
e.open = false;
|
||
}
|
||
});
|
||
innerToggle.title = "expand all docs";
|
||
innerToggle.children[0].innerText = "+";
|
||
}
|
||
|
||
function toggleAllDocs() {
|
||
const innerToggle = document.getElementById(toggleAllDocsId);
|
||
if (!innerToggle) {
|
||
return;
|
||
}
|
||
if (hasClass(innerToggle, "will-expand")) {
|
||
expandAllDocs();
|
||
} else {
|
||
collapseAllDocs();
|
||
}
|
||
}
|
||
|
||
(function() {
|
||
const toggles = document.getElementById(toggleAllDocsId);
|
||
if (toggles) {
|
||
toggles.onclick = toggleAllDocs;
|
||
}
|
||
|
||
const hideMethodDocs = getSettingValue("auto-hide-method-docs") === "true";
|
||
const hideImplementations = getSettingValue("auto-hide-trait-implementations") === "true";
|
||
const hideLargeItemContents = getSettingValue("auto-hide-large-items") !== "false";
|
||
|
||
function setImplementorsTogglesOpen(id, open) {
|
||
const list = document.getElementById(id);
|
||
if (list !== null) {
|
||
onEachLazy(list.getElementsByClassName("implementors-toggle"), e => {
|
||
e.open = open;
|
||
});
|
||
}
|
||
}
|
||
|
||
if (hideImplementations) {
|
||
setImplementorsTogglesOpen("trait-implementations-list", false);
|
||
setImplementorsTogglesOpen("blanket-implementations-list", false);
|
||
}
|
||
|
||
onEachLazy(document.getElementsByClassName("toggle"), e => {
|
||
if (!hideLargeItemContents && hasClass(e, "type-contents-toggle")) {
|
||
e.open = true;
|
||
}
|
||
if (hideMethodDocs && hasClass(e, "method-toggle")) {
|
||
e.open = false;
|
||
}
|
||
|
||
});
|
||
}());
|
||
|
||
window.rustdoc_add_line_numbers_to_examples = () => {
|
||
onEachLazy(document.getElementsByClassName("rust-example-rendered"), x => {
|
||
const parent = x.parentNode;
|
||
const line_numbers = parent.querySelectorAll(".example-line-numbers");
|
||
if (line_numbers.length > 0) {
|
||
return;
|
||
}
|
||
const count = x.textContent.split("\n").length;
|
||
const elems = [];
|
||
for (let i = 0; i < count; ++i) {
|
||
elems.push(i + 1);
|
||
}
|
||
const node = document.createElement("pre");
|
||
addClass(node, "example-line-numbers");
|
||
node.innerHTML = elems.join("\n");
|
||
parent.insertBefore(node, x);
|
||
});
|
||
};
|
||
|
||
window.rustdoc_remove_line_numbers_from_examples = () => {
|
||
onEachLazy(document.getElementsByClassName("rust-example-rendered"), x => {
|
||
const parent = x.parentNode;
|
||
const line_numbers = parent.querySelectorAll(".example-line-numbers");
|
||
for (const node of line_numbers) {
|
||
parent.removeChild(node);
|
||
}
|
||
});
|
||
};
|
||
|
||
if (getSettingValue("line-numbers") === "true") {
|
||
window.rustdoc_add_line_numbers_to_examples();
|
||
}
|
||
|
||
function showSidebar() {
|
||
window.hideAllModals(false);
|
||
const sidebar = document.getElementsByClassName("sidebar")[0];
|
||
addClass(sidebar, "shown");
|
||
}
|
||
|
||
function hideSidebar() {
|
||
const sidebar = document.getElementsByClassName("sidebar")[0];
|
||
removeClass(sidebar, "shown");
|
||
}
|
||
|
||
window.addEventListener("resize", () => {
|
||
if (window.CURRENT_TOOLTIP_ELEMENT) {
|
||
// As a workaround to the behavior of `contains: layout` used in doc togglers,
|
||
// tooltip popovers are positioned using javascript.
|
||
//
|
||
// This means when the window is resized, we need to redo the layout.
|
||
const base = window.CURRENT_TOOLTIP_ELEMENT.TOOLTIP_BASE;
|
||
const force_visible = base.TOOLTIP_FORCE_VISIBLE;
|
||
hideTooltip(false);
|
||
if (force_visible) {
|
||
showTooltip(base);
|
||
base.TOOLTIP_FORCE_VISIBLE = true;
|
||
}
|
||
}
|
||
});
|
||
|
||
const mainElem = document.getElementById(MAIN_ID);
|
||
if (mainElem) {
|
||
mainElem.addEventListener("click", hideSidebar);
|
||
}
|
||
|
||
onEachLazy(document.querySelectorAll("a[href^='#']"), el => {
|
||
// For clicks on internal links (<A> tags with a hash property), we expand the section we're
|
||
// jumping to *before* jumping there. We can't do this in onHashChange, because it changes
|
||
// the height of the document so we wind up scrolled to the wrong place.
|
||
el.addEventListener("click", () => {
|
||
expandSection(el.hash.slice(1));
|
||
hideSidebar();
|
||
});
|
||
});
|
||
|
||
onEachLazy(document.querySelectorAll(".toggle > summary:not(.hideme)"), el => {
|
||
el.addEventListener("click", e => {
|
||
if (e.target.tagName !== "SUMMARY" && e.target.tagName !== "A") {
|
||
e.preventDefault();
|
||
}
|
||
});
|
||
});
|
||
|
||
/**
|
||
* Show a tooltip immediately.
|
||
*
|
||
* @param {DOMElement} e - The tooltip's anchor point. The DOM is consulted to figure
|
||
* out what the tooltip should contain, and where it should be
|
||
* positioned.
|
||
*/
|
||
function showTooltip(e) {
|
||
const notable_ty = e.getAttribute("data-notable-ty");
|
||
if (!window.NOTABLE_TRAITS && notable_ty) {
|
||
const data = document.getElementById("notable-traits-data");
|
||
if (data) {
|
||
window.NOTABLE_TRAITS = JSON.parse(data.innerText);
|
||
} else {
|
||
throw new Error("showTooltip() called with notable without any notable traits!");
|
||
}
|
||
}
|
||
// Make this function idempotent. If the tooltip is already shown, avoid doing extra work
|
||
// and leave it alone.
|
||
if (window.CURRENT_TOOLTIP_ELEMENT && window.CURRENT_TOOLTIP_ELEMENT.TOOLTIP_BASE === e) {
|
||
clearTooltipHoverTimeout(window.CURRENT_TOOLTIP_ELEMENT);
|
||
return;
|
||
}
|
||
window.hideAllModals(false);
|
||
const wrapper = document.createElement("div");
|
||
if (notable_ty) {
|
||
wrapper.innerHTML = "<div class=\"content\">" +
|
||
window.NOTABLE_TRAITS[notable_ty] + "</div>";
|
||
} else {
|
||
// Replace any `title` attribute with `data-title` to avoid double tooltips.
|
||
if (e.getAttribute("title") !== null) {
|
||
e.setAttribute("data-title", e.getAttribute("title"));
|
||
e.removeAttribute("title");
|
||
}
|
||
if (e.getAttribute("data-title") !== null) {
|
||
const titleContent = document.createElement("div");
|
||
titleContent.className = "content";
|
||
titleContent.appendChild(document.createTextNode(e.getAttribute("data-title")));
|
||
wrapper.appendChild(titleContent);
|
||
}
|
||
}
|
||
wrapper.className = "tooltip popover";
|
||
const focusCatcher = document.createElement("div");
|
||
focusCatcher.setAttribute("tabindex", "0");
|
||
focusCatcher.onfocus = hideTooltip;
|
||
wrapper.appendChild(focusCatcher);
|
||
const pos = e.getBoundingClientRect();
|
||
// 5px overlap so that the mouse can easily travel from place to place
|
||
wrapper.style.top = (pos.top + window.scrollY + pos.height) + "px";
|
||
wrapper.style.left = 0;
|
||
wrapper.style.right = "auto";
|
||
wrapper.style.visibility = "hidden";
|
||
const body = document.getElementsByTagName("body")[0];
|
||
body.appendChild(wrapper);
|
||
const wrapperPos = wrapper.getBoundingClientRect();
|
||
// offset so that the arrow points at the center of the "(i)"
|
||
const finalPos = pos.left + window.scrollX - wrapperPos.width + 24;
|
||
if (finalPos > 0) {
|
||
wrapper.style.left = finalPos + "px";
|
||
} else {
|
||
wrapper.style.setProperty(
|
||
"--popover-arrow-offset",
|
||
(wrapperPos.right - pos.right + 4) + "px"
|
||
);
|
||
}
|
||
wrapper.style.visibility = "";
|
||
window.CURRENT_TOOLTIP_ELEMENT = wrapper;
|
||
window.CURRENT_TOOLTIP_ELEMENT.TOOLTIP_BASE = e;
|
||
clearTooltipHoverTimeout(window.CURRENT_TOOLTIP_ELEMENT);
|
||
wrapper.onpointerenter = function(ev) {
|
||
// If this is a synthetic touch event, ignore it. A click event will be along shortly.
|
||
if (ev.pointerType !== "mouse") {
|
||
return;
|
||
}
|
||
clearTooltipHoverTimeout(e);
|
||
};
|
||
wrapper.onpointerleave = function(ev) {
|
||
// If this is a synthetic touch event, ignore it. A click event will be along shortly.
|
||
if (ev.pointerType !== "mouse") {
|
||
return;
|
||
}
|
||
if (!e.TOOLTIP_FORCE_VISIBLE && !elemIsInParent(ev.relatedTarget, e)) {
|
||
// See "Tooltip pointer leave gesture" below.
|
||
setTooltipHoverTimeout(e, false);
|
||
addClass(wrapper, "fade-out");
|
||
}
|
||
};
|
||
}
|
||
|
||
/**
|
||
* Show or hide the tooltip after a timeout. If a timeout was already set before this function
|
||
* was called, that timeout gets cleared. If the tooltip is already in the requested state,
|
||
* this function will still clear any pending timeout, but otherwise do nothing.
|
||
*
|
||
* @param {DOMElement} element - The tooltip's anchor point. The DOM is consulted to figure
|
||
* out what the tooltip should contain, and where it should be
|
||
* positioned.
|
||
* @param {boolean} show - If true, the tooltip will be made visible. If false, it will
|
||
* be hidden.
|
||
*/
|
||
function setTooltipHoverTimeout(element, show) {
|
||
clearTooltipHoverTimeout(element);
|
||
if (!show && !window.CURRENT_TOOLTIP_ELEMENT) {
|
||
// To "hide" an already hidden element, just cancel its timeout.
|
||
return;
|
||
}
|
||
if (show && window.CURRENT_TOOLTIP_ELEMENT) {
|
||
// To "show" an already visible element, just cancel its timeout.
|
||
return;
|
||
}
|
||
if (window.CURRENT_TOOLTIP_ELEMENT &&
|
||
window.CURRENT_TOOLTIP_ELEMENT.TOOLTIP_BASE !== element) {
|
||
// Don't do anything if another tooltip is already visible.
|
||
return;
|
||
}
|
||
element.TOOLTIP_HOVER_TIMEOUT = setTimeout(() => {
|
||
if (show) {
|
||
showTooltip(element);
|
||
} else if (!element.TOOLTIP_FORCE_VISIBLE) {
|
||
hideTooltip(false);
|
||
}
|
||
}, show ? window.RUSTDOC_TOOLTIP_HOVER_MS : window.RUSTDOC_TOOLTIP_HOVER_EXIT_MS);
|
||
}
|
||
|
||
/**
|
||
* If a show/hide timeout was set by `setTooltipHoverTimeout`, cancel it. If none exists,
|
||
* do nothing.
|
||
*
|
||
* @param {DOMElement} element - The tooltip's anchor point,
|
||
* as passed to `setTooltipHoverTimeout`.
|
||
*/
|
||
function clearTooltipHoverTimeout(element) {
|
||
if (element.TOOLTIP_HOVER_TIMEOUT !== undefined) {
|
||
removeClass(window.CURRENT_TOOLTIP_ELEMENT, "fade-out");
|
||
clearTimeout(element.TOOLTIP_HOVER_TIMEOUT);
|
||
delete element.TOOLTIP_HOVER_TIMEOUT;
|
||
}
|
||
}
|
||
|
||
function tooltipBlurHandler(event) {
|
||
if (window.CURRENT_TOOLTIP_ELEMENT &&
|
||
!elemIsInParent(document.activeElement, window.CURRENT_TOOLTIP_ELEMENT) &&
|
||
!elemIsInParent(event.relatedTarget, window.CURRENT_TOOLTIP_ELEMENT) &&
|
||
!elemIsInParent(document.activeElement, window.CURRENT_TOOLTIP_ELEMENT.TOOLTIP_BASE) &&
|
||
!elemIsInParent(event.relatedTarget, window.CURRENT_TOOLTIP_ELEMENT.TOOLTIP_BASE)
|
||
) {
|
||
// Work around a difference in the focus behaviour between Firefox, Chrome, and Safari.
|
||
// When I click the button on an already-opened tooltip popover, Safari
|
||
// hides the popover and then immediately shows it again, while everyone else hides it
|
||
// and it stays hidden.
|
||
//
|
||
// To work around this, make sure the click finishes being dispatched before
|
||
// hiding the popover. Since `hideTooltip()` is idempotent, this makes Safari behave
|
||
// consistently with the other two.
|
||
setTimeout(() => hideTooltip(false), 0);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Hide the current tooltip immediately.
|
||
*
|
||
* @param {boolean} focus - If set to `true`, move keyboard focus to the tooltip anchor point.
|
||
* If set to `false`, leave keyboard focus alone.
|
||
*/
|
||
function hideTooltip(focus) {
|
||
if (window.CURRENT_TOOLTIP_ELEMENT) {
|
||
if (window.CURRENT_TOOLTIP_ELEMENT.TOOLTIP_BASE.TOOLTIP_FORCE_VISIBLE) {
|
||
if (focus) {
|
||
window.CURRENT_TOOLTIP_ELEMENT.TOOLTIP_BASE.focus();
|
||
}
|
||
window.CURRENT_TOOLTIP_ELEMENT.TOOLTIP_BASE.TOOLTIP_FORCE_VISIBLE = false;
|
||
}
|
||
const body = document.getElementsByTagName("body")[0];
|
||
body.removeChild(window.CURRENT_TOOLTIP_ELEMENT);
|
||
clearTooltipHoverTimeout(window.CURRENT_TOOLTIP_ELEMENT);
|
||
window.CURRENT_TOOLTIP_ELEMENT = null;
|
||
}
|
||
}
|
||
|
||
onEachLazy(document.getElementsByClassName("tooltip"), e => {
|
||
e.onclick = function() {
|
||
this.TOOLTIP_FORCE_VISIBLE = this.TOOLTIP_FORCE_VISIBLE ? false : true;
|
||
if (window.CURRENT_TOOLTIP_ELEMENT && !this.TOOLTIP_FORCE_VISIBLE) {
|
||
hideTooltip(true);
|
||
} else {
|
||
showTooltip(this);
|
||
window.CURRENT_TOOLTIP_ELEMENT.setAttribute("tabindex", "0");
|
||
window.CURRENT_TOOLTIP_ELEMENT.focus();
|
||
window.CURRENT_TOOLTIP_ELEMENT.onblur = tooltipBlurHandler;
|
||
}
|
||
return false;
|
||
};
|
||
e.onpointerenter = function(ev) {
|
||
// If this is a synthetic touch event, ignore it. A click event will be along shortly.
|
||
if (ev.pointerType !== "mouse") {
|
||
return;
|
||
}
|
||
setTooltipHoverTimeout(this, true);
|
||
};
|
||
e.onpointermove = function(ev) {
|
||
// If this is a synthetic touch event, ignore it. A click event will be along shortly.
|
||
if (ev.pointerType !== "mouse") {
|
||
return;
|
||
}
|
||
setTooltipHoverTimeout(this, true);
|
||
};
|
||
e.onpointerleave = function(ev) {
|
||
// If this is a synthetic touch event, ignore it. A click event will be along shortly.
|
||
if (ev.pointerType !== "mouse") {
|
||
return;
|
||
}
|
||
if (!this.TOOLTIP_FORCE_VISIBLE &&
|
||
!elemIsInParent(ev.relatedTarget, window.CURRENT_TOOLTIP_ELEMENT)) {
|
||
// Tooltip pointer leave gesture:
|
||
//
|
||
// Designing a good hover microinteraction is a matter of guessing user
|
||
// intent from what are, literally, vague gestures. In this case, guessing if
|
||
// hovering in or out of the tooltip base is intentional or not.
|
||
//
|
||
// To figure this out, a few different techniques are used:
|
||
//
|
||
// * When the mouse pointer enters a tooltip anchor point, its hitbox is grown
|
||
// on the bottom, where the popover is/will appear. Search "hover tunnel" in
|
||
// rustdoc.css for the implementation.
|
||
// * There's a delay when the mouse pointer enters the popover base anchor, in
|
||
// case the mouse pointer was just passing through and the user didn't want
|
||
// to open it.
|
||
// * Similarly, a delay is added when exiting the anchor, or the popover
|
||
// itself, before hiding it.
|
||
// * A fade-out animation is layered onto the pointer exit delay to immediately
|
||
// inform the user that they successfully dismissed the popover, while still
|
||
// providing a way for them to cancel it if it was a mistake and they still
|
||
// wanted to interact with it.
|
||
// * No animation is used for revealing it, because we don't want people to try
|
||
// to interact with an element while it's in the middle of fading in: either
|
||
// they're allowed to interact with it while it's fading in, meaning it can't
|
||
// serve as mistake-proofing for the popover, or they can't, but
|
||
// they might try and be frustrated.
|
||
//
|
||
// See also:
|
||
// * https://www.nngroup.com/articles/timing-exposing-content/
|
||
// * https://www.nngroup.com/articles/tooltip-guidelines/
|
||
// * https://bjk5.com/post/44698559168/breaking-down-amazons-mega-dropdown
|
||
setTooltipHoverTimeout(e, false);
|
||
addClass(window.CURRENT_TOOLTIP_ELEMENT, "fade-out");
|
||
}
|
||
};
|
||
});
|
||
|
||
const sidebar_menu_toggle = document.getElementsByClassName("sidebar-menu-toggle")[0];
|
||
if (sidebar_menu_toggle) {
|
||
sidebar_menu_toggle.addEventListener("click", () => {
|
||
const sidebar = document.getElementsByClassName("sidebar")[0];
|
||
if (!hasClass(sidebar, "shown")) {
|
||
showSidebar();
|
||
} else {
|
||
hideSidebar();
|
||
}
|
||
});
|
||
}
|
||
|
||
function helpBlurHandler(event) {
|
||
blurHandler(event, getHelpButton(), window.hidePopoverMenus);
|
||
}
|
||
|
||
function buildHelpMenu() {
|
||
const book_info = document.createElement("span");
|
||
book_info.className = "top";
|
||
book_info.innerHTML = "You can find more information in \
|
||
<a href=\"https://doc.rust-lang.org/rustdoc/\">the rustdoc book</a>.";
|
||
|
||
const shortcuts = [
|
||
["?", "Show this help dialog"],
|
||
["S", "Focus the search field"],
|
||
["↑", "Move up in search results"],
|
||
["↓", "Move down in search results"],
|
||
["← / →", "Switch result tab (when results focused)"],
|
||
["⏎", "Go to active search result"],
|
||
["+", "Expand all sections"],
|
||
["-", "Collapse all sections"],
|
||
].map(x => "<dt>" +
|
||
x[0].split(" ")
|
||
.map((y, index) => ((index & 1) === 0 ? "<kbd>" + y + "</kbd>" : " " + y + " "))
|
||
.join("") + "</dt><dd>" + x[1] + "</dd>").join("");
|
||
const div_shortcuts = document.createElement("div");
|
||
addClass(div_shortcuts, "shortcuts");
|
||
div_shortcuts.innerHTML = "<h2>Keyboard Shortcuts</h2><dl>" + shortcuts + "</dl></div>";
|
||
|
||
const infos = [
|
||
"For a full list of all search features, take a look <a \
|
||
href='https://doc.rust-lang.org/stable/rustdoc/how-to-read-rustdoc.html\
|
||
#the-search-interface'>here</a>.",
|
||
"Prefix searches with a type followed by a colon (e.g., <code>fn:</code>) to \
|
||
restrict the search to a given item kind.",
|
||
"Accepted kinds are: <code>fn</code>, <code>mod</code>, <code>struct</code>, \
|
||
<code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, \
|
||
and <code>const</code>.",
|
||
"Search functions by type signature (e.g., <code>vec -> usize</code> or \
|
||
<code>-> vec</code> or <code>String, enum:Cow -> bool</code>)",
|
||
"You can look for items with an exact name by putting double quotes around \
|
||
your request: <code>\"string\"</code>",
|
||
"Look for functions that accept or return \
|
||
<a href=\"https://doc.rust-lang.org/std/primitive.slice.html\">slices</a> and \
|
||
<a href=\"https://doc.rust-lang.org/std/primitive.array.html\">arrays</a> by writing \
|
||
square brackets (e.g., <code>-> [u8]</code> or <code>[] -> Option</code>)",
|
||
"Look for items inside another one by searching for a path: <code>vec::Vec</code>",
|
||
].map(x => "<p>" + x + "</p>").join("");
|
||
const div_infos = document.createElement("div");
|
||
addClass(div_infos, "infos");
|
||
div_infos.innerHTML = "<h2>Search Tricks</h2>" + infos;
|
||
|
||
const rustdoc_version = document.createElement("span");
|
||
rustdoc_version.className = "bottom";
|
||
const rustdoc_version_code = document.createElement("code");
|
||
rustdoc_version_code.innerText = "rustdoc " + getVar("rustdoc-version");
|
||
rustdoc_version.appendChild(rustdoc_version_code);
|
||
|
||
const container = document.createElement("div");
|
||
if (!isHelpPage) {
|
||
container.className = "popover";
|
||
}
|
||
container.id = "help";
|
||
container.style.display = "none";
|
||
|
||
const side_by_side = document.createElement("div");
|
||
side_by_side.className = "side-by-side";
|
||
side_by_side.appendChild(div_shortcuts);
|
||
side_by_side.appendChild(div_infos);
|
||
|
||
container.appendChild(book_info);
|
||
container.appendChild(side_by_side);
|
||
container.appendChild(rustdoc_version);
|
||
|
||
if (isHelpPage) {
|
||
const help_section = document.createElement("section");
|
||
help_section.appendChild(container);
|
||
document.getElementById("main-content").appendChild(help_section);
|
||
container.style.display = "block";
|
||
} else {
|
||
const help_button = getHelpButton();
|
||
help_button.appendChild(container);
|
||
|
||
container.onblur = helpBlurHandler;
|
||
help_button.onblur = helpBlurHandler;
|
||
help_button.children[0].onblur = helpBlurHandler;
|
||
}
|
||
|
||
return container;
|
||
}
|
||
|
||
/**
|
||
* Hide popover menus, clickable tooltips, and the sidebar (if applicable).
|
||
*
|
||
* Pass "true" to reset focus for tooltip popovers.
|
||
*/
|
||
window.hideAllModals = function(switchFocus) {
|
||
hideSidebar();
|
||
window.hidePopoverMenus();
|
||
hideTooltip(switchFocus);
|
||
};
|
||
|
||
/**
|
||
* Hide all the popover menus.
|
||
*/
|
||
window.hidePopoverMenus = function() {
|
||
onEachLazy(document.querySelectorAll(".search-form .popover"), elem => {
|
||
elem.style.display = "none";
|
||
});
|
||
};
|
||
|
||
/**
|
||
* Returns the help menu element (not the button).
|
||
*
|
||
* @param {boolean} buildNeeded - If this argument is `false`, the help menu element won't be
|
||
* built if it doesn't exist.
|
||
*
|
||
* @return {HTMLElement}
|
||
*/
|
||
function getHelpMenu(buildNeeded) {
|
||
let menu = getHelpButton().querySelector(".popover");
|
||
if (!menu && buildNeeded) {
|
||
menu = buildHelpMenu();
|
||
}
|
||
return menu;
|
||
}
|
||
|
||
/**
|
||
* Show the help popup menu.
|
||
*/
|
||
function showHelp() {
|
||
// Prevent `blur` events from being dispatched as a result of closing
|
||
// other modals.
|
||
getHelpButton().querySelector("a").focus();
|
||
const menu = getHelpMenu(true);
|
||
if (menu.style.display === "none") {
|
||
window.hideAllModals();
|
||
menu.style.display = "";
|
||
}
|
||
}
|
||
|
||
if (isHelpPage) {
|
||
showHelp();
|
||
document.querySelector(`#${HELP_BUTTON_ID} > a`).addEventListener("click", event => {
|
||
// Already on the help page, make help button a no-op.
|
||
const target = event.target;
|
||
if (target.tagName !== "A" ||
|
||
target.parentElement.id !== HELP_BUTTON_ID ||
|
||
event.ctrlKey ||
|
||
event.altKey ||
|
||
event.metaKey) {
|
||
return;
|
||
}
|
||
event.preventDefault();
|
||
});
|
||
} else {
|
||
document.querySelector(`#${HELP_BUTTON_ID} > a`).addEventListener("click", event => {
|
||
// By default, have help button open docs in a popover.
|
||
// If user clicks with a moderator, though, use default browser behavior,
|
||
// probably opening in a new window or tab.
|
||
const target = event.target;
|
||
if (target.tagName !== "A" ||
|
||
target.parentElement.id !== HELP_BUTTON_ID ||
|
||
event.ctrlKey ||
|
||
event.altKey ||
|
||
event.metaKey) {
|
||
return;
|
||
}
|
||
event.preventDefault();
|
||
const menu = getHelpMenu(true);
|
||
const shouldShowHelp = menu.style.display === "none";
|
||
if (shouldShowHelp) {
|
||
showHelp();
|
||
} else {
|
||
window.hidePopoverMenus();
|
||
}
|
||
});
|
||
}
|
||
|
||
setMobileTopbar();
|
||
addSidebarItems();
|
||
addSidebarCrates();
|
||
onHashChange(null);
|
||
window.addEventListener("hashchange", onHashChange);
|
||
searchState.setup();
|
||
}());
|
||
|
||
(function() {
|
||
let reset_button_timeout = null;
|
||
|
||
const but = document.getElementById("copy-path");
|
||
if (!but) {
|
||
return;
|
||
}
|
||
but.onclick = () => {
|
||
const parent = but.parentElement;
|
||
const path = [];
|
||
|
||
onEach(parent.childNodes, child => {
|
||
if (child.tagName === "A") {
|
||
path.push(child.textContent);
|
||
}
|
||
});
|
||
|
||
const el = document.createElement("textarea");
|
||
el.value = path.join("::");
|
||
el.setAttribute("readonly", "");
|
||
// To not make it appear on the screen.
|
||
el.style.position = "absolute";
|
||
el.style.left = "-9999px";
|
||
|
||
document.body.appendChild(el);
|
||
el.select();
|
||
document.execCommand("copy");
|
||
document.body.removeChild(el);
|
||
|
||
// There is always one children, but multiple childNodes.
|
||
but.children[0].style.display = "none";
|
||
|
||
let tmp;
|
||
if (but.childNodes.length < 2) {
|
||
tmp = document.createTextNode("✓");
|
||
but.appendChild(tmp);
|
||
} else {
|
||
onEachLazy(but.childNodes, e => {
|
||
if (e.nodeType === Node.TEXT_NODE) {
|
||
tmp = e;
|
||
return true;
|
||
}
|
||
});
|
||
tmp.textContent = "✓";
|
||
}
|
||
|
||
if (reset_button_timeout !== null) {
|
||
window.clearTimeout(reset_button_timeout);
|
||
}
|
||
|
||
function reset_button() {
|
||
tmp.textContent = "";
|
||
reset_button_timeout = null;
|
||
but.children[0].style.display = "";
|
||
}
|
||
|
||
reset_button_timeout = window.setTimeout(reset_button, 1000);
|
||
};
|
||
}());
|