Initial commit
continuous-integration/drone/push Build is passing
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continuous-integration/drone/push Build is passing
Details
commit
f80161ee22
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kind: pipeline
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name: default
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type: docker
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steps:
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- name: build
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image: node:20-alpine
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commands:
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- yarn install
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- yarn build
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# Logs
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logs
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*.log
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npm-debug.log*
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yarn-debug.log*
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yarn-error.log*
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pnpm-debug.log*
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lerna-debug.log*
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node_modules
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dist
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dist-ssr
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*.local
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# Editor directories and files
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.vscode/*
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.idea
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.DS_Store
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*.suo
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*.ntvs*
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*.njsproj
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*.sln
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*.sw?
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# Locks
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package-lock.json
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yarn.lock
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pnpm-lock.yaml
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bun.lockb
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finite-state-automaton
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======================
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Use
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---
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### No build-tool
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While this project is written with the Node.Js tooling (Vite+MermaidJS), a simple transformation can be done to make it work in a browser.
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```sh
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sed -i "s|from 'mermaid'|from 'https://cdn.jsdelivr.net/npm/mermaid@10/dist/mermaid.esm.min.mjs'|" src/fsm.js
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```
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### Build-tool
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Run your favorite package manager (npm, yarn, pnpm, bun, etc.) to install the dependencies and build the Vite application:
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```sh
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npm install
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npm run dev # Run the Vite development server
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npm run build # Build the application in the dist/ directory
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```
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{
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"typescript": {
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"quoteStyle": "preferSingle"
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},
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"includes": ["src/**/*.{ts,tsx,js,jsx,cjs,mjs,json}", "*.ts"],
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"excludes": [
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"**/node_modules"
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],
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"plugins": [
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"https://plugins.dprint.dev/typescript-0.88.7.wasm"
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]
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}
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<!doctype html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>Finite-state automaton</title>
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<meta name="description" content="Test a word against a finite-state automaton" />
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<link rel="stylesheet" href="src/style.css" />
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</head>
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<body>
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<div id="app">
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<input type="text" id="word-input" />
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<div class="input">
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<div id="input-buttons"></div>
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<div id="light"></div>
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</div>
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<pre id="pen"></pre>
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<pre id="state-graph"></pre>
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</div>
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<script type="module" src="src/fsm.js"></script>
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</body>
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</html>
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{
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"name": "finite-state-automaton",
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"private": true,
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"version": "0.0.0",
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"type": "module",
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"scripts": {
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"dev": "vite",
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"build": "tsc && vite build",
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"preview": "vite preview"
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},
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"devDependencies": {
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"typescript": "^5.3.3",
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"vite": "^5.0.8"
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},
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"dependencies": {
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"mermaid": "^10.6.1"
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}
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}
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/**
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* @typedef State
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* @property {Object.<string, number>} transitions
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* @property {boolean} [accepting]
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*/
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/**
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* @type {State[]}
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*/
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export const ENDS_WITH_TWO_B = [
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{ transitions: { a: 0, b: 1 } },
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{ transitions: { a: 0, b: 2 } },
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{ transitions: { a: 0, b: 2 }, accepting: true },
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];
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import mermaid from 'mermaid';
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import { ENDS_WITH_TWO_B } from './examples.js';
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const IS_VALID = 'is-valid';
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const IS_INVALID = 'is-invalid';
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const wordInput = /** @type {HTMLInputElement} */ (document.getElementById('word-input'));
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const buttons = /** @type {HTMLDivElement} */ (document.getElementById('input-buttons'));
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const light = /** @type {HTMLDivElement} */ (document.getElementById('light'));
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mermaid.initialize({
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theme: window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'default',
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startOnLoad: false,
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});
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const states = ENDS_WITH_TWO_B;
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let state = 0;
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let builder = '';
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// Build the mermaid graph definition
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let graphDefinition = 'stateDiagram-v2';
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for (let i = 0; i < states.length; ++i) {
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graphDefinition += `\n s${i} : ${i}`;
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for (const [transition, destination] of Object.entries(states[i].transitions)) {
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graphDefinition += `\n s${i} --> s${destination}: ${transition}`;
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}
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}
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const graph = /** @type {HTMLDivElement} */ (document.getElementById('pen'));
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const { svg } = await mermaid.render('state-graph', graphDefinition);
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graph.innerHTML = svg;
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const nodes = graph.querySelectorAll('.label-container');
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/**
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* Updates the UI to reflect the current state.
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*/
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function updateUIState() {
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wordInput.value = builder;
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if (state === -1 || !states[state].accepting) {
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light.classList.remove(IS_VALID);
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light.classList.add(IS_INVALID);
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} else {
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light.classList.remove(IS_INVALID);
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light.classList.add(IS_VALID);
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}
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nodes.forEach((node) => node.classList.remove('current-node'));
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if (state in nodes) {
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nodes[state].classList.add('current-node');
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}
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}
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/**
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* Steps the FSM with the given letter.
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*
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* @param {string} letter
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*/
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function step(letter) {
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if (state === -1) {
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return;
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}
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builder += letter;
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state = states[state].transitions[letter] ?? -1;
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updateUIState();
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}
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// Dynamically create buttons for each letter in the alphabet
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/**
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* @type {string[]}
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*/
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const alphabet = Array.from(states.reduce((acc, current) => {
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Object.keys(current.transitions).forEach(current => acc.add(current));
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return acc;
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}, new Set())).sort();
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for (const letter of alphabet) {
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const button = document.createElement('button');
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button.innerText = letter;
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button.addEventListener('click', () => step(letter));
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buttons.appendChild(button);
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}
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// Reacts to input in the text box
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wordInput.addEventListener('input', () => {
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const value = wordInput.value;
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console.log(value);
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builder = '';
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state = 0;
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for (const letter of value) {
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step(letter);
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}
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if (!value.length) {
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updateUIState();
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}
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});
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updateUIState();
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:root {
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font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
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line-height: 1.5;
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font-weight: 400;
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color-scheme: light dark;
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color: rgba(255, 255, 255, 0.87);
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background-color: #242424;
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font-synthesis: none;
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text-rendering: optimizeLegibility;
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-webkit-font-smoothing: antialiased;
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-moz-osx-font-smoothing: grayscale;
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}
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body {
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margin: 0;
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display: flex;
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place-items: center;
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min-width: 320px;
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min-height: 100vh;
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}
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h1 {
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font-size: 3.2em;
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line-height: 1.1;
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}
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#app {
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max-width: 1280px;
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margin: 0 auto;
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padding: 2rem;
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text-align: center;
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}
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.input {
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display: flex;
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align-items: center;
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}
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input {
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padding: 0.3em 0.5em;
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margin-bottom: 0.5em;
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font-size: 1.1em;
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width: 6em;
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background-color: transparent;
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transition: border-color 0.25s;
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}
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button {
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border-radius: 8px;
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border: 1px solid transparent;
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padding: 0.6em 1.2em;
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font-size: 1em;
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font-weight: 500;
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font-family: inherit;
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background-color: #1a1a1a;
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cursor: pointer;
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transition: border-color 0.25s;
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}
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button:hover {
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border-color: #646cff;
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}
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button:focus,
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button:focus-visible {
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outline: 4px auto -webkit-focus-ring-color;
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}
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#light {
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width: 2.5em;
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height: 2.5em;
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border-radius: 50%;
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background-color: #1a1a1a;
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margin-left: .75em;
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}
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#light.is-valid {
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background-color: #46fd46;
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}
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#light.is-invalid {
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background-color: #fd3838;
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}
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.current-node {
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fill: red !important;
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}
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@media (prefers-color-scheme: light) {
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:root {
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color: #213547;
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background-color: #ffffff;
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}
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button {
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background-color: #f9f9f9;
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}
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}
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@ -0,0 +1,26 @@
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{
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"compilerOptions": {
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"target": "ESNext",
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"useDefineForClassFields": true,
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"module": "ESNext",
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"lib": ["ESNext", "DOM", "DOM.Iterable"],
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"types": ["vite/client"],
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"skipLibCheck": true,
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"allowJs": true,
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"checkJs": true,
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/* Bundler mode */
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"moduleResolution": "bundler",
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"allowImportingTsExtensions": true,
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"resolveJsonModule": true,
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"isolatedModules": true,
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"noEmit": true,
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/* Linting */
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"strict": true,
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"noUnusedLocals": true,
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"noUnusedParameters": true,
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"noFallthroughCasesInSwitch": true
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},
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"include": ["src"]
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}
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@ -0,0 +1,17 @@
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import { defineConfig } from 'vite';
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export default defineConfig({
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base: '',
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build: {
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target: 'esnext',
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modulePreload: false,
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rollupOptions: {
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external: ['mermaid'],
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output: {
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||||
paths: {
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||||
mermaid: 'https://cdn.jsdelivr.net/npm/mermaid@10/dist/mermaid.esm.min.mjs',
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||||
},
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||||
},
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||||
},
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||||
},
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||||
});
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||||
Loading…
Reference in new issue