mirror of
https://github.com/HeyPuter/puter
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74 lines
2.9 KiB
JavaScript
74 lines
2.9 KiB
JavaScript
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import * as libv86 from '../third-party/libv86.js';
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/**
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* Class representing an Instance of an emulator machine.
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*/
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class Instance {
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/**
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* Create an Instance.
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* @param {Object} options - Options for configuring the instance.
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* @param {boolean} [options.term=true] - Terminal option.
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* @param {boolean} [options.screen=false] - Screen option.
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* @param {number} [options.memory=1024] - Memory size for the instance; must be power of two.
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* @param {HTMLElement} [options.spawnRoot=undefined] - Html element where instance should be spawned.
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* @param {boolean} [options.autoStart=true] - Whether to automatically start the instance.
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* @param {string} [options.remote="./"] - Remote URL, defaults to origin.
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* @param {string} [options.wsUrl=""] - Websocket URL option for communication with the outside world.
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* @throws Will throw an error if remote URL does not end with a slash. @throws Will throw an error if the amount of memory provided is not a power of two.
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*/
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constructor(options) {
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const defaultOptions = {
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term: true,
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screen: false,
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memory: 1024,
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spawnRoot: undefined,
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autoStart: true,
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remote: "./",
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instanceName: [...Array(10)].map(() => Math.random().toString(36)[2]).join(''),
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wsUrl: "",
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};
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const instanceOptions = { ...defaultOptions, ...options };
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if (!instanceOptions.remote.endsWith('/'))
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throw new Error("Remote URL must end with a slash");
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if (typeof self !== 'undefined' && self.crypto) {
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this.instanceID = self.crypto.randomUUID();
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} else {
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this.instanceID = "Node";
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}
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this.terminals = [];
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let v86Options = {
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wasm_path: instanceOptions.remote + "third-party/v86.wasm",
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preserve_mac_from_state_image: true,
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memory_size: instanceOptions.memory * 1024 * 1024,
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vga_memory_size: 8 * 1024 * 1024,
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initial_state: { url: instanceOptions.remote + "static/image.bin" },
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filesystem: { baseurl: instanceOptions.remote + "static/9p-rootfs/" },
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autostart: instanceOptions.autoStart,
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};
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if (!(instanceOptions.wsUrl === ""))
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v86Options.network_relay_url = instanceOptions.wsUrl;
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if (!((Math.log(v86Options.memory_size) / Math.log(2)) % 1 === 0))
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throw new Error("Amount of memory provided isn't a power of two");
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if (instanceOptions.screen === true) {
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instanceOptions.spawnRoot.appendChild((() => {
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const div = document.createElement("div");
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div.setAttribute("id", instanceOptions.instanceName + '-screen');
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const child_div = document.createElement("div");
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child_div.setAttribute("style", "white-space: pre; font: 14px monospace; line-height: 14px");
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const canvas = document.createElement("canvas");
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canvas.setAttribute("style", "display: none");
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div.appendChild(child_div);
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div.appendChild(canvas);
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return div;
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})());
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v86Options.screen_container = document.getElementById(instanceOptions.instanceName + '-screen');
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}
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this.vm = new libv86.V86(v86Options);
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}
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}
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export default Instance
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