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LEGALISE_PIRACY 2024-05-05 20:59:36 +00:00
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commit b6b67291a3
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/**
* Downloads a file from a url and writes it to the CheerpJ filesystem.
* @param {string} url
* @param {string} destPath
* @param {(downloadedBytes: number, totalBytes: number) => void} [progressCallback]
* @returns {Promise<void>}
*/
async function downloadFileToCheerpJ(url, destPath, progressCallback) {
const response = await fetch(url);
const reader = response.body.getReader();
const contentLength = +response.headers.get('Content-Length');
const bytes = new Uint8Array(contentLength);
progressCallback?.(0, contentLength);
let pos = 0;
while (true) {
const { done, value } = await reader.read();
if (done)
break;
bytes.set(value, pos);
pos += value.length;
progressCallback?.(pos, contentLength);
}
// Write to CheerpJ filesystem
return new Promise((resolve, reject) => {
cheerpOSOpen(cjFDs, destPath, "w", fd => {
cheerpOSWrite(cjFDs, fd, bytes, 0, bytes.length, w => {
cheerpOSClose(cjFDs, fd);
resolve();
});
});
});
}
const template = document.createElement('template');
template.innerHTML = `
<style>
:host {
display: inline-block;
aspect-ratio: 854 / 480;
background: black;
color: #eee;
color-scheme: dark;
width: 854px;
height: 480px;
}
:host([hidden]) {
display: none;
}
canvas {
width: inherit;
height: inherit;
}
.display {
width: 854px;
height: 480px;
position: absolute;
inset: 0;
visibility: hidden;
}
.intro {
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
height: 100%;
}
p {
max-width: 60ch;
}
.disclaimer {
font-size: 0.8em;
opacity: 0.5;
}
button {
padding: 0.5em 1em;
margin: 2em;
}
progress {
width: calc(100% - 2em);
margin: 1em;
}
*:focus {
outline: none;
}
</style>
<canvas width="854" height="480" tabindex="-1"></canvas>
<div class="display"></div>
<div class="intro">
<p>
This is a proof-of-concept demo of Minecraft 1.2.5 running unmodified in the browser.
</p>
<p>
Clicking the button below will download the client from mojang.com.
By clicking it, you agree to the <a href="https://www.minecraft.net/eula">Minecraft EULA</a>.
</p>
<button>Play!</button>
<div class="disclaimer">
This is not an official Minecraft product. It is not approved by or associated with Mojang or Microsoft.
</div>
</div>
<progress style="display: none"></progress>
`;
export default class MinecraftClient extends HTMLElement {
#canvas;
#progress;
#button;
#display;
#intro;
#isRunning;
constructor() {
super();
const shadowRoot = this.attachShadow({ mode: 'open' });
shadowRoot.appendChild(template.content.cloneNode(true));
this.#button = shadowRoot.querySelector('button');
this.#button.addEventListener('click', () => this.run());
this.#canvas = shadowRoot.querySelector('canvas');
this.#canvas.width = 854;
this.#canvas.height = 480;
this.#canvas.tabIndex = -1;
this.#canvas.style.display = 'none';
this.#progress = shadowRoot.querySelector('progress');
this.#progress.style.display = 'none';
this.#intro = shadowRoot.querySelector('.intro');
// CheerpJ needs an element to render to, but we are going to render to own canvas
this.#display = shadowRoot.querySelector('.display');
this.#display.setAttribute('style', 'width:100%;height:100%;position:absolute;top:0;left:0px;visibility:hidden;');
cheerpjCreateDisplay(-1, -1, this.#display);
this.#isRunning = false;
}
static register() {
customElements.define('minecraft-client', this);
}
/** @returns {Promise<number>} Exit code */
async run() {
if (this.#isRunning) {
throw new Error('Already running');
}
this.#intro.style.display = 'none';
this.#progress.style.display = 'unset';
const jarPath = "/files/client_1.2.5.jar"
await downloadFileToCheerpJ(
"https://piston-data.mojang.com/v1/objects/4a2fac7504182a97dcbcd7560c6392d7c8139928/client.jar",
jarPath,
(downloadedBytes, totalBytes) => {
this.#progress.value = downloadedBytes;
this.#progress.max = totalBytes;
}
);
this.#progress.style.display = 'none';
this.#canvas.style.display = 'unset';
window.lwjglCanvasElement = this.#canvas;
const exitCode = await cheerpjRunMain("net.minecraft.client.Minecraft", `/app/lwjgl-2.9.0.jar:/app/lwjgl_util-2.9.0.jar:${jarPath}`)
this.#canvas.style.display = 'none';
this.#isRunning = false;
return exitCode;
}
/** @returns {boolean} */
get isRunning() {
return this.#isRunning;
}
}