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// From rust:
/* global sourcesIndex */
// Local js definitions:
/* global addClass, getCurrentValue, onEachLazy, removeClass, browserSupportsHistoryApi */
/* global updateLocalStorage */
"use strict";
(function() {
const rootPath = document.getElementById("rustdoc-vars").attributes["data-root-path"].value;
const NAME_OFFSET = 0;
const DIRS_OFFSET = 1;
const FILES_OFFSET = 2;
function closeSidebarIfMobile() {
if (window.innerWidth < window.RUSTDOC_MOBILE_BREAKPOINT) {
updateLocalStorage("source-sidebar-show", "false");
}
}
function createDirEntry(elem, parent, fullPath, hasFoundFile) {
const dirEntry = document.createElement("details");
const summary = document.createElement("summary");
dirEntry.className = "dir-entry";
fullPath += elem[NAME_OFFSET] + "/";
summary.innerText = elem[NAME_OFFSET];
dirEntry.appendChild(summary);
const folders = document.createElement("div");
folders.className = "folders";
if (elem[DIRS_OFFSET]) {
for (const dir of elem[DIRS_OFFSET]) {
if (createDirEntry(dir, folders, fullPath, false)) {
dirEntry.open = true;
hasFoundFile = true;
}
}
}
dirEntry.appendChild(folders);
const files = document.createElement("div");
files.className = "files";
if (elem[FILES_OFFSET]) {
for (const file_text of elem[FILES_OFFSET]) {
const file = document.createElement("a");
file.innerText = file_text;
file.href = rootPath + "src/" + fullPath + file_text + ".html";
file.addEventListener("click", closeSidebarIfMobile);
const w = window.location.href.split("#")[0];
if (!hasFoundFile && w === file.href) {
file.className = "selected";
dirEntry.open = true;
hasFoundFile = true;
}
files.appendChild(file);
}
}
dirEntry.appendChild(files);
parent.appendChild(dirEntry);
return hasFoundFile;
}
function toggleSidebar() {
const child = this.parentNode.children[0];
if (child.innerText === ">") {
window.rustdocMobileScrollLock();
addClass(document.documentElement, "source-sidebar-expanded");
child.innerText = "<";
updateLocalStorage("source-sidebar-show", "true");
} else {
window.rustdocMobileScrollUnlock();
removeClass(document.documentElement, "source-sidebar-expanded");
child.innerText = ">";
updateLocalStorage("source-sidebar-show", "false");
}
}
function createSidebarToggle() {
const sidebarToggle = document.createElement("div");
sidebarToggle.id = "sidebar-toggle";
const inner = document.createElement("button");
if (getCurrentValue("source-sidebar-show") === "true") {
inner.innerText = "<";
} else {
inner.innerText = ">";
}
inner.onclick = toggleSidebar;
sidebarToggle.appendChild(inner);
return sidebarToggle;
}
// This function is called from "source-files.js", generated in `html/render/write_shared.rs`.
// eslint-disable-next-line no-unused-vars
function createSourceSidebar() {
const container = document.querySelector("nav.sidebar");
const sidebarToggle = createSidebarToggle();
container.insertBefore(sidebarToggle, container.firstChild);
const sidebar = document.createElement("div");
sidebar.id = "source-sidebar";
let hasFoundFile = false;
const title = document.createElement("div");
title.className = "title";
title.innerText = "Files";
sidebar.appendChild(title);
Object.keys(sourcesIndex).forEach(key => {
sourcesIndex[key][NAME_OFFSET] = key;
hasFoundFile = createDirEntry(sourcesIndex[key], sidebar, "",
hasFoundFile);
});
container.appendChild(sidebar);
// Focus on the current file in the source files sidebar.
const selected_elem = sidebar.getElementsByClassName("selected")[0];
if (typeof selected_elem !== "undefined") {
selected_elem.focus();
}
}
const lineNumbersRegex = /^#?(\d+)(?:-(\d+))?$/;
function highlightSourceLines(match) {
if (typeof match === "undefined") {
match = window.location.hash.match(lineNumbersRegex);
}
if (!match) {
return;
}
let from = parseInt(match[1], 10);
let to = from;
if (typeof match[2] !== "undefined") {
to = parseInt(match[2], 10);
}
if (to < from) {
const tmp = to;
to = from;
from = tmp;
}
let elem = document.getElementById(from);
if (!elem) {
return;
}
const x = document.getElementById(from);
if (x) {
x.scrollIntoView();
}
onEachLazy(document.getElementsByClassName("src-line-numbers"), e => {
onEachLazy(e.getElementsByTagName("a"), i_e => {
removeClass(i_e, "line-highlighted");
});
});
for (let i = from; i <= to; ++i) {
elem = document.getElementById(i);
if (!elem) {
break;
}
addClass(elem, "line-highlighted");
}
}
const handleSourceHighlight = (function() {
let prev_line_id = 0;
const set_fragment = name => {
const x = window.scrollX,
y = window.scrollY;
if (browserSupportsHistoryApi()) {
history.replaceState(null, null, "#" + name);
highlightSourceLines();
} else {
location.replace("#" + name);
}
// Prevent jumps when selecting one or many lines
window.scrollTo(x, y);
};
return ev => {
let cur_line_id = parseInt(ev.target.id, 10);
// This event handler is attached to the entire line number column, but it should only
// be run if one of the anchors is clicked. It also shouldn't do anything if the anchor
// is clicked with a modifier key (to open a new browser tab).
if (isNaN(cur_line_id) ||
ev.ctrlKey ||
ev.altKey ||
ev.metaKey) {
return;
}
ev.preventDefault();
if (ev.shiftKey && prev_line_id) {
// Swap selection if needed
if (prev_line_id > cur_line_id) {
const tmp = prev_line_id;
prev_line_id = cur_line_id;
cur_line_id = tmp;
}
set_fragment(prev_line_id + "-" + cur_line_id);
} else {
prev_line_id = cur_line_id;
set_fragment(cur_line_id);
}
};
}());
window.addEventListener("hashchange", () => {
const match = window.location.hash.match(lineNumbersRegex);
if (match) {
return highlightSourceLines(match);
}
});
onEachLazy(document.getElementsByClassName("src-line-numbers"), el => {
el.addEventListener("click", handleSourceHighlight);
});
highlightSourceLines();
window.createSourceSidebar = createSourceSidebar;
})();
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