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Application.ts
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Application.ts
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import type { IComponentOptions } from "./Component";
/**
* Component definition.
*/
export interface IComponent {
constructor: new (options: IComponentOptions) => unknown;
selector: string;
}
/**
* List of all known components.
*/
const components: IComponent[] = [];
/**
* Register a new component.
*/
export function registerComponent(
constructor: IComponent["constructor"],
selector: string,
) {
components.push({
selector: selector,
constructor: constructor,
});
}
/**
* TypeDoc application class.
*/
export class Application {
alwaysVisibleMember: HTMLElement | null = null;
constructor() {
this.createComponents(document.body);
this.ensureFocusedElementVisible();
this.listenForCodeCopies();
window.addEventListener("hashchange", () =>
this.ensureFocusedElementVisible(),
);
// We're on a *really* slow network connection and the inline JS
// has already made the page display.
if (!document.body.style.display) {
this.ensureFocusedElementVisible();
this.updateIndexVisibility();
this.scrollToHash();
}
}
/**
* Create all components beneath the given element.
*/
public createComponents(context: HTMLElement) {
components.forEach((c) => {
context.querySelectorAll<HTMLElement>(c.selector).forEach((el) => {
if (!el.dataset["hasInstance"]) {
new c.constructor({ el, app: this });
el.dataset["hasInstance"] = String(true);
}
});
});
}
public filterChanged() {
this.ensureFocusedElementVisible();
}
public showPage() {
if (!document.body.style.display) return;
console.log("Show page");
document.body.style.removeProperty("display");
this.ensureFocusedElementVisible();
this.updateIndexVisibility();
this.scrollToHash();
}
public scrollToHash() {
// Because we hid the entire page until the navigation loaded or we hit a timeout,
// we have to manually resolve the url hash here.
if (location.hash) {
console.log("Scorlling");
const reflAnchor = document.getElementById(
location.hash.substring(1),
);
if (!reflAnchor) return;
reflAnchor.scrollIntoView({ behavior: "instant", block: "start" });
}
}
public ensureActivePageVisible() {
const pageLink = document.querySelector(".tsd-navigation .current");
let iter = pageLink?.parentElement;
while (iter && !iter.classList.contains(".tsd-navigation")) {
// Expand parent namespaces if collapsed, and this module
if (iter instanceof HTMLDetailsElement) {
iter.open = true;
}
iter = iter.parentElement;
}
if (pageLink && !pageLink.checkVisibility()) {
const top =
pageLink.getBoundingClientRect().top -
document.documentElement.clientHeight / 4;
// If we are showing three columns, this will scroll the site menu down to
// show the page we just loaded in the navigation.
document.querySelector(".site-menu")!.scrollTop = top;
}
}
public updateIndexVisibility() {
const indexAccordion =
document.querySelector<HTMLDetailsElement>(".tsd-index-content");
const oldOpen = indexAccordion?.open;
if (indexAccordion) {
indexAccordion.open = true;
}
// Hide index headings where all index items are hidden.
// offsetParent == null checks for display: none
document
.querySelectorAll<HTMLElement>(".tsd-index-section")
.forEach((el) => {
el.style.display = "block";
const allChildrenHidden = Array.from(
el.querySelectorAll<HTMLElement>(".tsd-index-link"),
).every((child) => child.offsetParent == null);
el.style.display = allChildrenHidden ? "none" : "block";
});
if (indexAccordion) {
indexAccordion.open = oldOpen!;
}
}
/**
* Ensures that if a user was linked to a reflection which is hidden because of filter
* settings, that reflection is still shown.
*/
private ensureFocusedElementVisible() {
if (this.alwaysVisibleMember) {
this.alwaysVisibleMember.classList.remove("always-visible");
this.alwaysVisibleMember.firstElementChild!.remove();
this.alwaysVisibleMember = null;
}
if (!location.hash) return;
const reflAnchor = document.getElementById(location.hash.substring(1));
if (!reflAnchor) return;
let reflContainer = reflAnchor.parentElement!;
while (reflContainer && reflContainer.tagName !== "SECTION") {
reflContainer = reflContainer.parentElement!;
}
if (!reflContainer) {
// This is probably a link in the readme, doesn't have a containing section
return;
}
if (reflContainer.offsetParent == null) {
this.alwaysVisibleMember = reflContainer;
reflContainer.classList.add("always-visible");
const warning = document.createElement("p");
warning.classList.add("warning");
warning.textContent =
"This member is normally hidden due to your filter settings.";
reflContainer.prepend(warning);
}
}
private listenForCodeCopies() {
document.querySelectorAll("pre > button").forEach((button) => {
let timeout: ReturnType<typeof setTimeout>;
button.addEventListener("click", () => {
if (button.previousElementSibling instanceof HTMLElement) {
navigator.clipboard.writeText(
button.previousElementSibling.innerText.trim(),
);
}
button.textContent = "Copied!";
button.classList.add("visible");
clearTimeout(timeout);
timeout = setTimeout(() => {
button.classList.remove("visible");
timeout = setTimeout(() => {
button.textContent = "Copy";
}, 100);
}, 1000);
});
});
}
}