60 lines
1.3 KiB
TypeScript
60 lines
1.3 KiB
TypeScript
import type { TUI } from "../tui";
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import { Text } from "./text";
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/**
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* Loader component that updates every 80ms with spinning animation
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*/
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export class Loader extends Text {
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#frames = ["⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏"];
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#currentFrame = 0;
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#intervalId?: NodeJS.Timeout;
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#ui: TUI | null = null;
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constructor(
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ui: TUI,
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private spinnerColorFn: (str: string) => string,
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private messageColorFn: (str: string) => string,
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private message: string = "Loading...",
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spinnerFrames?: string[],
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) {
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super("", 1, 0);
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this.#ui = ui;
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if (spinnerFrames && spinnerFrames.length > 0) {
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this.#frames = spinnerFrames;
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}
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this.start();
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}
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render(width: number): string[] {
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return ["", ...super.render(width)];
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}
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start() {
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this.#updateDisplay();
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this.#intervalId = setInterval(() => {
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this.#currentFrame = (this.#currentFrame + 1) % this.#frames.length;
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this.#updateDisplay();
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}, 80);
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}
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stop() {
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if (this.#intervalId) {
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clearInterval(this.#intervalId);
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this.#intervalId = undefined;
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}
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}
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setMessage(message: string) {
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this.message = message;
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this.#updateDisplay();
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}
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#updateDisplay() {
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const frame = this.#frames[this.#currentFrame];
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this.setText(`${this.spinnerColorFn(frame)} ${this.messageColorFn(this.message)}`);
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if (this.#ui) {
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this.#ui.requestRender();
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}
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}
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}
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