forked from AbleOS/holey-bytes
555 lines
16 KiB
JavaScript
555 lines
16 KiB
JavaScript
/// @ts-check
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/** @return {never} */
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function never() { throw new Error() }
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/**@type{WebAssembly.Instance}*/ let hbcInstance;
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/**@type{Promise<WebAssembly.WebAssemblyInstantiatedSource>}*/ let hbcInstaceFuture;
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async function getHbcInstance() {
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hbcInstaceFuture ??= WebAssembly.instantiateStreaming(fetch("/hbc.wasm"), {});
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return hbcInstance ??= (await hbcInstaceFuture).instance;
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}
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const stack_pointer_offset = 1 << 20;
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/** @param {WebAssembly.Instance} instance @param {Post[]} packages @param {number} fuel
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* @returns {string} */
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function compileCode(instance, packages, fuel = 100) {
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let {
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INPUT, INPUT_LEN,
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LOG_MESSAGES, LOG_MESSAGES_LEN,
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memory, compile_and_run,
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} = instance.exports;
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if (!(true
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&& memory instanceof WebAssembly.Memory
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&& INPUT instanceof WebAssembly.Global
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&& INPUT_LEN instanceof WebAssembly.Global
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&& LOG_MESSAGES instanceof WebAssembly.Global
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&& LOG_MESSAGES_LEN instanceof WebAssembly.Global
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&& typeof compile_and_run === "function"
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)) never();
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const codeLength = packPosts(packages, new DataView(memory.buffer, INPUT.value));
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new DataView(memory.buffer).setUint32(INPUT_LEN.value, codeLength, true);
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runWasmFunction(instance, compile_and_run, fuel);
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return bufToString(memory, LOG_MESSAGES, LOG_MESSAGES_LEN).trim();
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}
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/**@type{WebAssembly.Instance}*/ let fmtInstance;
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/**@type{Promise<WebAssembly.WebAssemblyInstantiatedSource>}*/ let fmtInstaceFuture;
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async function getFmtInstance() {
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fmtInstaceFuture ??= WebAssembly.instantiateStreaming(fetch("/hbfmt.wasm"), {});
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return fmtInstance ??= (await fmtInstaceFuture).instance;
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}
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/** @param {WebAssembly.Instance} instance @param {string} code @param {"tok" | "fmt" | "minify"} action
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* @returns {string | Uint8Array | undefined} */
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function modifyCode(instance, code, action) {
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let {
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INPUT, INPUT_LEN,
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OUTPUT, OUTPUT_LEN,
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memory, fmt, tok, minify
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} = instance.exports;
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let funs = { fmt, tok, minify };
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let fun = funs[action];
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if (!(true
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&& memory instanceof WebAssembly.Memory
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&& INPUT instanceof WebAssembly.Global
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&& INPUT_LEN instanceof WebAssembly.Global
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&& OUTPUT instanceof WebAssembly.Global
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&& OUTPUT_LEN instanceof WebAssembly.Global
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&& funs.hasOwnProperty(action)
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&& typeof fun === "function"
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)) never();
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if (action !== "fmt") {
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INPUT = OUTPUT;
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INPUT_LEN = OUTPUT_LEN;
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}
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let dw = new DataView(memory.buffer);
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dw.setUint32(INPUT_LEN.value, code.length, true);
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new Uint8Array(memory.buffer, INPUT.value).set(new TextEncoder().encode(code));
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if (!runWasmFunction(instance, fun)) {
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return undefined;
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}
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if (action === "tok") {
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return bufSlice(memory, OUTPUT, OUTPUT_LEN);
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} else {
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return bufToString(memory, OUTPUT, OUTPUT_LEN);
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}
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}
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/** @param {WebAssembly.Instance} instance @param {CallableFunction} func @param {any[]} args
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* @returns {boolean} */
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function runWasmFunction(instance, func, ...args) {
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const { PANIC_MESSAGE, PANIC_MESSAGE_LEN, memory, stack_pointer } = instance.exports;
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if (!(true
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&& memory instanceof WebAssembly.Memory
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&& stack_pointer instanceof WebAssembly.Global
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)) never();
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const ptr = stack_pointer.value;
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try {
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func(...args);
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return true;
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} catch (error) {
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if (error instanceof WebAssembly.RuntimeError
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&& error.message == "unreachable"
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&& PANIC_MESSAGE instanceof WebAssembly.Global
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&& PANIC_MESSAGE_LEN instanceof WebAssembly.Global) {
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console.error(bufToString(memory, PANIC_MESSAGE, PANIC_MESSAGE_LEN), error);
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} else {
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console.error(error);
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}
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stack_pointer.value = ptr;
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return false;
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}
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}
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/** @typedef {Object} Post
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* @property {string} path
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* @property {string} code */
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/** @param {Post[]} posts @param {DataView} view @returns {number} */
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function packPosts(posts, view) {
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const enc = new TextEncoder(), buf = new Uint8Array(view.buffer, view.byteOffset);
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let len = 0; for (const post of posts) {
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view.setUint16(len, post.path.length, true); len += 2;
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buf.set(enc.encode(post.path), len); len += post.path.length;
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view.setUint16(len, post.code.length, true); len += 2;
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buf.set(enc.encode(post.code), len); len += post.code.length;
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}
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return len;
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}
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/** @param {WebAssembly.Memory} mem
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* @param {WebAssembly.Global} ptr
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* @param {WebAssembly.Global} len
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* @return {Uint8Array} */
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function bufSlice(mem, ptr, len) {
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return new Uint8Array(mem.buffer, ptr.value,
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new DataView(mem.buffer).getUint32(len.value, true));
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}
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/** @param {WebAssembly.Memory} mem
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* @param {WebAssembly.Global} ptr
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* @param {WebAssembly.Global} len
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* @return {string} */
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function bufToString(mem, ptr, len) {
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const res = new TextDecoder()
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.decode(new Uint8Array(mem.buffer, ptr.value,
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new DataView(mem.buffer).getUint32(len.value, true)));
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new DataView(mem.buffer).setUint32(len.value, 0, true);
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return res;
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}
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/** @param {HTMLElement} target */
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function wireUp(target) {
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execApply(target);
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cacheInputs(target);
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bindCodeEdit(target);
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bindTextareaAutoResize(target);
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}
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const importRe = /@use\s*\(\s*"(([^"]|\\")+)"\s*\)/g;
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/** @param {WebAssembly.Instance} fmt
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* @param {string} code
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* @param {string[]} roots
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* @param {Post[]} buf
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* @param {Set<string>} prevRoots
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* @returns {void} */
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function loadCachedPackages(fmt, code, roots, buf, prevRoots) {
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buf[0].code = code;
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roots.length = 0;
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let changed = false;
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for (const match of code.matchAll(importRe)) {
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changed ||= !prevRoots.has(match[1]);
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roots.push(match[1]);
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}
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if (!changed) return;
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buf.length = 1;
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prevRoots.clear();
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for (let imp = roots.pop(); imp !== undefined; imp = roots.pop()) {
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if (prevRoots.has(imp)) continue; prevRoots.add(imp);
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const fmtd = modifyCode(fmt, localStorage.getItem("package-" + imp) ?? never(), "fmt");
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if (typeof fmtd != "string") never();
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buf.push({ path: imp, code: fmtd });
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for (const match of buf[buf.length - 1].code.matchAll(importRe)) {
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roots.push(match[1]);
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}
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}
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}
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/**@type{Set<string>}*/ const prevRoots = new Set();
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/**@typedef {Object} PackageCtx
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* @property {AbortController} [cancelation]
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* @property {string[]} keyBuf
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* @property {Set<string>} prevParams
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* @property {HTMLTextAreaElement} [edit] */
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/** @param {string} source @param {Set<string>} importDiff @param {HTMLPreElement} errors @param {PackageCtx} ctx */
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async function fetchPackages(source, importDiff, errors, ctx) {
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importDiff.clear();
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for (const match of source.matchAll(importRe)) {
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if (localStorage["package-" + match[1]]) continue;
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importDiff.add(match[1]);
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}
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if (importDiff.size !== 0 && (ctx.prevParams.size != importDiff.size
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|| [...ctx.prevParams.keys()].every(e => importDiff.has(e)))) {
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if (ctx.cancelation) ctx.cancelation.abort();
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ctx.prevParams.clear();
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ctx.prevParams = new Set([...importDiff]);
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ctx.cancelation = new AbortController();
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ctx.keyBuf.length = 0;
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ctx.keyBuf.push(...importDiff.keys());
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errors.textContent = "fetching: " + ctx.keyBuf.join(", ");
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await fetch(`/code`, {
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method: "POST",
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signal: ctx.cancelation.signal,
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headers: { "Content-Type": "application/json" },
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body: JSON.stringify(ctx.keyBuf),
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}).then(async e => {
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try {
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const json = await e.json();
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if (e.status == 200) {
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for (const [key, value] of Object.entries(json)) {
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localStorage["package-" + key] = value;
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}
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const missing = ctx.keyBuf.filter(i => json[i] === undefined);
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if (missing.length !== 0) {
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errors.textContent = "deps not found: " + missing.join(", ");
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} else {
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ctx.cancelation = undefined;
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ctx.edit?.dispatchEvent(new InputEvent("input"));
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}
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}
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} catch (er) {
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errors.textContent = "completely failed to fetch ("
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+ e.status + "): " + ctx.keyBuf.join(", ");
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console.error(e, er);
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}
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});
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}
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}
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/** @param {HTMLElement} target */
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async function bindCodeEdit(target) {
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const edit = target.querySelector("#code-edit");
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if (!(edit instanceof HTMLTextAreaElement)) return;
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const codeSize = target.querySelector("#code-size");
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const errors = target.querySelector("#compiler-output");
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if (!(true
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&& codeSize instanceof HTMLSpanElement
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&& errors instanceof HTMLPreElement
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)) never();
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const MAX_CODE_SIZE = parseInt(codeSize.innerHTML);
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if (Number.isNaN(MAX_CODE_SIZE)) never();
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const hbc = await getHbcInstance(), fmt = await getFmtInstance();
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let importDiff = new Set();
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/**@type{Post[]}*/
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const packages = [{ path: "local.hb", code: "" }];
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const debounce = 100;
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let timeout = 0;
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const ctx = { keyBuf: [], prevParams: new Set(), edit };
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prevRoots.clear();
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const onInput = () => {
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fetchPackages(edit.value, importDiff, errors, ctx);
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if (ctx.cancelation && importDiff.size !== 0) {
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return;
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}
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loadCachedPackages(fmt, edit.value, ctx.keyBuf, packages, prevRoots);
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errors.textContent = compileCode(hbc, packages);
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const minified_size = modifyCode(fmt, edit.value, "minify")?.length;
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if (minified_size) {
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codeSize.textContent = (MAX_CODE_SIZE - minified_size) + "";
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const perc = Math.min(100, Math.floor(100 * (minified_size / MAX_CODE_SIZE)));
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codeSize.style.color = `color-mix(in srgb, light-dark(black, white), var(--error) ${perc}%)`;
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}
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timeout = 0;
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};
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edit.addEventListener("input", () => {
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if (timeout) clearTimeout(timeout);
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timeout = setTimeout(onInput, debounce)
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});
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edit.dispatchEvent(new InputEvent("input"));
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}
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/**
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* @type {Array<string>}
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* to be synched with `enum TokenGroup` in bytecode/src/fmt.rs */
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const TOK_CLASSES = [
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'Blank',
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'Comment',
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'Keyword',
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'Identifier',
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'Directive',
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'Number',
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'String',
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'Op',
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'Assign',
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'Paren',
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'Bracket',
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'Colon',
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'Comma',
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'Dot',
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'Ctor',
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];
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/** @type {{ [key: string]: (el: HTMLElement) => void | Promise<void> }} */
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const applyFns = {
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timestamp: (el) => {
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const timestamp = el.innerText;
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const date = new Date(parseInt(timestamp) * 1000);
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el.innerText = date.toLocaleString();
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},
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fmt,
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};
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/**
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* @param {HTMLElement} target */
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async function fmt(target) {
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const code = target.innerText;
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const instance = await getFmtInstance();
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const decoder = new TextDecoder('utf-8');
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const fmt = modifyCode(instance, code, 'fmt');
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if (typeof fmt !== "string") return;
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const codeBytes = new TextEncoder().encode(fmt);
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const tok = modifyCode(instance, fmt, 'tok');
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if (!(tok instanceof Uint8Array)) return;
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target.innerHTML = '';
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let start = 0;
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let kind = tok[0];
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for (let ii = 1; ii <= tok.length; ii += 1) {
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// split over same tokens and buffer end
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if (tok[ii] === kind && ii < tok.length) {
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continue;
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}
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const text = decoder.decode(codeBytes.subarray(start, ii));
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const textNode = document.createTextNode(text);;
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if (kind === 0) {
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target.appendChild(textNode);
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} else {
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const el = document.createElement('span');
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el.classList.add('syn');
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el.classList.add(TOK_CLASSES[kind]);
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el.appendChild(textNode);
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target.appendChild(el);
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}
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if (ii == tok.length) {
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break;
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}
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start = ii;
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kind = tok[ii];
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}
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}
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/** @param {HTMLElement} target */
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function execApply(target) {
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const proises = [];
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for (const elem of target.querySelectorAll('[apply]')) {
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if (!(elem instanceof HTMLElement)) continue;
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const funcname = elem.getAttribute('apply') ?? never();
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const vl = applyFns[funcname](elem);
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if (vl instanceof Promise) proises.push(vl);
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}
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if (target === document.body) {
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Promise.all(proises).then(() => document.body.hidden = false);
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}
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}
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/** @param {HTMLElement} target */
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function bindTextareaAutoResize(target) {
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for (const textarea of target.querySelectorAll("textarea")) {
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if (!(textarea instanceof HTMLTextAreaElement)) never();
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const taCssMap = window.getComputedStyle(textarea);
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const padding = parseInt(taCssMap.getPropertyValue('padding-top') ?? "0")
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+ parseInt(taCssMap.getPropertyValue('padding-top') ?? "0");
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textarea.style.height = "auto";
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textarea.style.height = (textarea.scrollHeight - padding) + "px";
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textarea.style.overflowY = "hidden";
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textarea.addEventListener("input", function() {
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let top = window.scrollY;
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textarea.style.height = "auto";
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textarea.style.height = (textarea.scrollHeight - padding) + "px";
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window.scrollTo({ top });
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});
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textarea.onkeydown = (ev) => {
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if (ev.key === "Tab") {
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ev.preventDefault();
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document.execCommand('insertText', false, "\t");
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}
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}
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}
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}
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/** @param {HTMLElement} target */
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function cacheInputs(target) {
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/**@type {HTMLFormElement}*/ let form;
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for (form of target.querySelectorAll('form')) {
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const path = form.getAttribute('hx-post') || form.getAttribute('hx-delete');
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if (!path) {
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console.warn('form does not have a hx-post or hx-delete attribute', form);
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continue;
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}
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for (const input of form.elements) {
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if (input instanceof HTMLInputElement || input instanceof HTMLTextAreaElement) {
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if ('password submit button'.includes(input.type)) continue;
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const key = path + input.name;
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input.value = localStorage.getItem(key) ?? '';
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input.addEventListener("input", () => localStorage.setItem(key, input.value));
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} else {
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console.warn("unhandled form element: ", input);
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}
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}
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}
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}
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/** @param {string} [path] */
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function updateTab(path) {
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console.log(path);
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for (const elem of document.querySelectorAll("button[hx-push-url]")) {
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if (elem instanceof HTMLButtonElement)
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elem.disabled =
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elem.getAttribute("hx-push-url") === path
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|| elem.getAttribute("hx-push-url") === window.location.pathname;
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}
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}
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if (window.location.hostname === 'localhost') {
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let id; setInterval(async () => {
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let new_id = await fetch('/hot-reload').then(reps => reps.text());
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id ??= new_id;
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if (id !== new_id) window.location.reload();
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}, 300);
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(async function test() {
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{
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const code = "main:=fn():void{return}";
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const inst = await getFmtInstance()
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const fmtd = modifyCode(inst, code, "fmt") ?? never();
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if (typeof fmtd !== "string") never();
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const prev = modifyCode(inst, fmtd, "minify") ?? never();
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if (code != prev) console.error(code, prev);
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}
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{
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const posts = [{
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path: "foo.hb",
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code: "main:=fn():int{return 42}",
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}];
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const res = compileCode(await getHbcInstance(), posts, 1) ?? never();
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const expected = "exit code: 42";
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if (expected != res) console.error(expected, res);
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}
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})()
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}
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document.body.addEventListener('htmx:afterSwap', (ev) => {
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if (!(ev.target instanceof HTMLElement)) never();
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wireUp(ev.target);
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if (ev.target.tagName == "MAIN" || ev.target.tagName == "BODY")
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updateTab(ev['detail'].pathInfo.finalRequestPath);
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});
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getFmtInstance().then(inst => {
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document.body.addEventListener('htmx:configRequest', (ev) => {
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const details = ev['detail'];
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if (details.path === "/post" && details.verb === "post") {
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details.parameters['code'] = modifyCode(inst, details.parameters['code'], "minify");
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}
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});
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/** @param {string} query @param {string} target @returns {number} */
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function fuzzyCost(query, target) {
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let qi = 0, bi = 0, cost = 0, matched = false;
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while (qi < query.length) {
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if (query.charAt(qi) === target.charAt(bi++)) {
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matched = true;
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qi++;
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} else {
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cost++;
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}
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if (bi === target.length) (bi = 0, qi++);
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}
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return cost + (matched ? 0 : 100 * target.length);
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}
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let deps = undefined;
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/** @param {HTMLInputElement} input @returns {void} */
|
|
function filterCodeDeps(input) {
|
|
deps ??= document.getElementById("deps");
|
|
if (!(deps instanceof HTMLElement)) never();
|
|
if (input.value === "") {
|
|
deps.textContent = "results show here...";
|
|
return;
|
|
}
|
|
deps.innerHTML = "";
|
|
for (const root of [...prevRoots.keys()]
|
|
.sort((a, b) => fuzzyCost(input.value, a) - fuzzyCost(input.value, b))) {
|
|
const pane = document.createElement("div");
|
|
const code = modifyCode(inst, localStorage["package-" + root], "fmt");
|
|
pane.innerHTML = `<div>${root}</div><pre>${code}</pre>`;
|
|
deps.appendChild(pane);
|
|
}
|
|
if (deps.innerHTML === "") {
|
|
deps.textContent = "no results";
|
|
}
|
|
}
|
|
|
|
Object.assign(window, { filterCodeDeps });
|
|
});
|
|
|
|
/** @param {HTMLElement} target */
|
|
function runPost(target) {
|
|
while (!target.matches("div[class=preview]")) target = target.parentElement ?? never();
|
|
const code = target.querySelector("pre[apply=fmt]");
|
|
if (!(code instanceof HTMLPreElement)) never();
|
|
const output = target.querySelector("pre[id=compiler-output]");
|
|
if (!(output instanceof HTMLPreElement)) never();
|
|
|
|
Promise.all([getHbcInstance(), getFmtInstance()]).then(async ([hbc, fmt]) => {
|
|
const ctx = { keyBuf: [], prevParams: new Set() };
|
|
await fetchPackages(code.innerText ?? never(), new Set(), output, ctx);
|
|
const posts = [{ path: "this", code: "" }];
|
|
loadCachedPackages(fmt, code.innerText ?? never(), ctx.keyBuf, posts, new Set());
|
|
output.textContent = compileCode(hbc, posts);
|
|
output.hidden = false;
|
|
});
|
|
|
|
let author = encodeURIComponent(target.dataset.author ?? never());
|
|
let name = encodeURIComponent(target.dataset.name ?? never());
|
|
fetch(`/post/run?author=${author}&name=${name}`, { method: "POST" })
|
|
}
|
|
|
|
Object.assign(window, { runPost });
|
|
|
|
updateTab();
|
|
wireUp(document.body);
|
|
|