Merge branch 'main' into gh-pages

This commit is contained in:
Parker TenBroeck 2026-01-11 00:30:10 -05:00
commit 171c717b1e
17 changed files with 786 additions and 311 deletions

View file

@ -30,7 +30,7 @@
<section class="flexCol gap marginTop">
<div class="flexCenter sidePadding gap">
<button id="themeToggle" class="btn btn-grey" title="Toggle light/dark">
<button id="themeToggle" class="btn btn-blue" title="Toggle light/dark">
🌙 Dark
</button>
<button class="btn btm-grey" style="position: relative" id="shareBtn" type="button">
@ -46,6 +46,14 @@
</select>
</div>
<div class="hSplit styleOnly" title="Drag to resize canvas height"></div>
<div class="flexCenter sidePadding" style="font-size: calc(16px);font-weight: bold;color: var(--fg-1)">
<span style="margin-right: 0.5em;">Status: </span><span style="color: var(--fg-2)" id="simulationStatus">N/A</span>
</div>
<div class="flexCenter sidePadding">
<input id="machineInput" type="text" class="test-input" placeholder="Enter machine input…" />
</div>
</section>
</section>
@ -53,7 +61,7 @@
<div class="flexCol">
<div class="controls" style="background: var(--bg-0)">
<button id="togglePhysics" class="btn btn-toggle active" title="Toggle physics layout">
<button id="togglePhysics" class="btn btn-red btn-toggle active" title="Toggle physics layout">
Physics: ON
</button>
@ -63,21 +71,25 @@
<span class="spacer"></span>
<button id="resetSim" class="btn btn-blue" title="Stop and reset simulation">
⟲ Reset
<button id="reloadSim" class="btn btn-blue" title="Stop and Reload simulation">
⟲ Reload
</button>
<button id="playPause" class="btn btn-green" title="Run / pause simulation">
▶ Play
<button id="clearSim" class="btn btn-red" title="Stop and Clear simulation">
✖ Clear
</button>
<button id="step" class="btn btn-grey" title="Advance one step">
Step
<button id="stepSim" class="btn btn-yellow" title="Advance one step">
⏭ Step
</button>
<button id="playPauseSim" class="btn btn-green" title="Run / pause simulation">
▶ Play
</button>
<label class="speed">
Speed
<input id="speed" type="range" min="1" max="60" value="10" />
<span id="speedLabel">10x</span>
<input id="speedSim" type="range" min="1" max="60" value="1" />
<span id="speedSimLabel">10x</span>
</label>
</div>
<div class="hSplit styleOnly" title="Drag to resize canvas height"></div>

View file

@ -1,6 +1,6 @@
export type Machine = Fa | Pda | Tm;
export function machine_from_json(json: string): Machine {
export function parse_machine_from_json(json: string): Machine {
const machine: Machine = JSON.parse(json);
machine.states = new Map(Object.entries(machine.states));
@ -26,16 +26,16 @@ export function machine_from_json(json: string): Machine {
for (const [from, tos] of machine.transitions) {
for (const to of tos) {
const layer_0 = machine.transitions_components;
if(!layer_0.has(from.state)) layer_0.set(from.state, new Map());
if (!layer_0.has(from.state)) layer_0.set(from.state, new Map());
const layer_1 = machine.transitions_components.get(from.state)!;
if(!layer_1.has(from.letter)) layer_1.set(from.letter, []);
if (!layer_1.has(from.letter)) layer_1.set(from.letter, []);
const layer_2 = layer_1.get(from.letter)!;
layer_2.push(to);
const edge = from.state + "#" + to.state;
if (!machine.edges.has(edge)) machine.edges.set(edge, []);
machine.edges.get(edge)?.push({
repr: from.letter?from.letter:"ε",
repr: from.letter ? from.letter : "ε",
function: to.function,
transition: to.transition,
});
@ -49,18 +49,19 @@ export function machine_from_json(json: string): Machine {
for (const [from, tos] of machine.transitions) {
for (const to of tos) {
const layer_0 = machine.transitions_components;
if(!layer_0.has(from.state)) layer_0.set(from.state, new Map());
if (!layer_0.has(from.state)) layer_0.set(from.state, new Map());
const layer_1 = machine.transitions_components.get(from.state)!;
if(!layer_1.has(from.symbol)) layer_1.set(from.symbol, new Map());
if (!layer_1.has(from.symbol)) layer_1.set(from.symbol, new Map());
const layer_2 = layer_1.get(from.symbol)!;
if(!layer_2.has(from.letter)) layer_2.set(from.letter, []);
if (!layer_2.has(from.letter)) layer_2.set(from.letter, []);
const layer_3 = layer_2.get(from.letter)!;
layer_3.push(to);
const edge = from.state + "#" + to.state;
if (!machine.edges.has(edge)) machine.edges.set(edge, []);
machine.edges.get(edge)?.push({
repr: (from.letter?from.letter:"ε")+","+from.symbol+"->["+to.stack+"]",
repr: (from.letter ? from.letter : "ε") + "," + from.symbol +
"->[" + to.stack + "]",
function: to.function,
transition: to.transition,
});
@ -74,16 +75,16 @@ export function machine_from_json(json: string): Machine {
for (const [from, tos] of machine.transitions) {
for (const to of tos) {
const layer_0 = machine.transitions_components;
if(!layer_0.has(from.state)) layer_0.set(from.state, new Map());
if (!layer_0.has(from.state)) layer_0.set(from.state, new Map());
const layer_1 = machine.transitions_components.get(from.state)!;
if(!layer_1.has(from.symbol)) layer_1.set(from.symbol, []);
if (!layer_1.has(from.symbol)) layer_1.set(from.symbol, []);
const layer_2 = layer_1.get(from.symbol)!;
layer_2.push(to);
const edge = from.state + "#" + to.state;
if (!machine.edges.has(edge)) machine.edges.set(edge, []);
machine.edges.get(edge)?.push({
repr: from.symbol+"->"+to.symbol+","+to.direction,
repr: from.symbol + "->" + to.symbol + "," + to.direction,
function: to.function,
transition: to.transition,
});
@ -107,7 +108,7 @@ export type SymbolInfo = { definition: Span };
export type FaTransFrom = {
state: State;
letter: Letter|null;
letter: Letter | null;
};
export type FaTransTo = {
@ -132,14 +133,14 @@ export type Fa = {
final_states: Map<State, StateInfo>;
transitions: Map<FaTransFrom, FaTransTo[]>;
transitions_components: Map<State, Map<Letter|null, FaTransTo[]>>;
transitions_components: Map<State, Map<Letter | null, FaTransTo[]>>;
edges: Map<string, Edge[]>;
};
export type PdaTransFrom = {
state: State;
letter: Letter|null;
letter: Letter | null;
symbol: Symbol;
};
@ -162,7 +163,10 @@ export type Pda = {
final_states: Map<State, StateInfo> | null;
transitions: Map<PdaTransFrom, PdaTransTo[]>;
transitions_components: Map<State, Map<Symbol, Map<Letter|null, PdaTransTo[]>>>;
transitions_components: Map<
State,
Map<Symbol, Map<Letter | null, PdaTransTo[]>>
>;
edges: Map<string, Edge[]>;
};
@ -196,13 +200,3 @@ export type Tm = {
edges: Map<string, Edge[]>;
};
export type FaState = {
state: State,
position: number
}
export class FaSim{
}

87
web/root/src/bus.ts Normal file
View file

@ -0,0 +1,87 @@
// deno-lint-ignore-file
import type { Machine } from "./automata.ts";
import type { Sim, SimStepResult } from "./simulation.ts";
import type wasm from "./wasm.ts";
import type { Text } from "npm:@codemirror/state";
type Unsubscribe = () => void;
export class EventBus<Events extends Record<string, any>> {
private listeners = new Map<keyof Events, Set<(payload: any) => void>>();
on<K extends keyof Events>(
event: K,
handler: (payload: Events[K]) => void,
): Unsubscribe {
let set = this.listeners.get(event);
if (!set) {
set = new Set();
this.listeners.set(event, set);
}
set.add(handler as any);
return () => this.off(event, handler);
}
once<K extends keyof Events>(
event: K,
handler: (payload: Events[K]) => void,
): Unsubscribe {
const off = this.on(event, (payload) => {
off();
handler(payload);
});
return off;
}
off<K extends keyof Events>(event: K, handler: (payload: Events[K]) => void) {
const set = this.listeners.get(event);
if (!set) return;
set.delete(handler as any);
if (set.size === 0) this.listeners.delete(event);
}
emit<K extends keyof Events>(event: K, payload: Events[K]) {
const set = this.listeners.get(event);
if (!set) return;
// Copy to avoid issues if handlers subscribe/unsubscribe during emit
for (const handler of Array.from(set)) {
try {
(handler as (p: Events[K]) => void)(payload);
} catch (e) {
console.log(e);
}
}
}
clear(event?: keyof Events) {
if (event) this.listeners.delete(event);
else this.listeners.clear();
}
}
type AppEvents = {
"begin": void;
"editor/change": {text: string, doc: Text};
"compiled": {log: wasm.CompileLog[], ansi_log: string, machine: string|undefined};
"automata/sim/update": { simulation: Sim|null };
"automata/sim/before_step": { simulation: Sim };
"automata/sim/after_step": { simulation: Sim, result: SimStepResult };
"automata/update": { automaton: Machine };
"controls/physics": {enabled: boolean},
"controls/reset_network": void,
"controls/step_simulation": void,
"controls/reload_simulation": void,
"controls/clear_simulation": void,
"theme/update": void;
};
export const bus = new EventBus<AppEvents>();

View file

@ -1,56 +1,70 @@
import {nodes, edges, network} from "./visualizer.ts"
import { bus } from "./bus.ts";
const togglePhysicsBtn = document.getElementById("togglePhysics") as HTMLButtonElement;
const resetLayoutBtn = document.getElementById("resetLayout") as HTMLButtonElement;
const playPauseBtn = document.getElementById("playPause") as HTMLButtonElement;
const stepBtn = document.getElementById("step") as HTMLButtonElement;
const speedSlider = document.getElementById("speed") as HTMLInputElement;
const speedLabel = document.getElementById("speedLabel") as HTMLSpanElement;
const resetSimBtn = document.getElementById("resetSim") as HTMLButtonElement;
const togglePhysicsBtn = document.getElementById(
"togglePhysics",
) as HTMLButtonElement;
const resetLayoutBtn = document.getElementById(
"resetLayout",
) as HTMLButtonElement;
const playPauseBtn = document.getElementById(
"playPauseSim",
) as HTMLButtonElement;
const stepBtn = document.getElementById("stepSim") as HTMLButtonElement;
const speedSlider = document.getElementById("speedSim") as HTMLInputElement;
const speedLabel = document.getElementById("speedSimLabel") as HTMLSpanElement;
const reloadSimBtn = document.getElementById("reloadSim") as HTMLButtonElement;
const clearSimBtn = document.getElementById("clearSim") as HTMLButtonElement;
function stepSimulation(): void {
console.log("step");
}
function resetSimulation(): void {
console.log("reset");
}
// ---- Physics toggle (styled label) ----
function setPhysicsButtonUI(enabled: boolean) {
bus.on("controls/physics", ({ enabled }) => {
togglePhysicsBtn.classList.toggle("active", enabled);
togglePhysicsBtn.textContent = enabled ? "Physics: ON" : "Physics: OFF";
}
});
togglePhysicsBtn.onclick = () => {
const enabled = !togglePhysicsBtn.classList.contains("active");
setPhysicsButtonUI(enabled);
network.setOptions({ physics: { enabled } });
network.setOptions({edges: {smooth: enabled}});
bus.emit("controls/physics", { enabled });
};
setPhysicsButtonUI(togglePhysicsBtn.classList.contains("active"));
bus.emit("controls/physics", {
enabled: togglePhysicsBtn.classList.contains("active"),
});
resetLayoutBtn.onclick = () => {
try {
nodes.forEach((n) => {
n.physics = true;
n.x = undefined;
n.y = undefined;
});
network.setData({ nodes, edges });
} catch {
// Last resort
network.setData({ nodes, edges });
resetLayoutBtn.onclick = () => bus.emit("controls/reset_network", undefined);
clearSimBtn.onclick = () => bus.emit("controls/clear_simulation", undefined);
stepBtn.onclick = () => {
bus.emit("controls/step_simulation", undefined);
};
reloadSimBtn.onclick = () => bus.emit("controls/reload_simulation", undefined);
function updateButtons() {
stepBtn.disabled = !simulation_active || running;
playPauseBtn.disabled = !simulation_active;
clearSimBtn.disabled = !simulation_active;
}
bus.on("controls/reload_simulation", (_) => {
if (running) setRunning(false);
updateButtons();
});
bus.on("automata/sim/update", ({ simulation }) => {
simulation_active = !!simulation;
if (!simulation) {
if (running) setRunning(false);
}
updateButtons();
});
// If physics button is OFF, keep it OFF (dont surprise the user)
const physicsEnabled = togglePhysicsBtn.classList.contains("active");
network.setOptions({ physics: { enabled: physicsEnabled } });
};
bus.on("automata/sim/after_step", ({ result }) => {
if (result !== "pending") {
if (running) setRunning(false);
}
});
// ---- Play/Pause + Speed ----
let simulation_active = false;
let running = false;
let timer: number | null = null;
@ -81,8 +95,7 @@ function restartTimer() {
const intervalMs = Math.round(1000 / sps);
timer = globalThis.window.setInterval(() => {
// If your step can throw, keep the interval alive:
try { stepSimulation(); } catch (e) { console.error(e); }
bus.emit("controls/step_simulation", undefined);
}, intervalMs);
}
@ -100,18 +113,3 @@ function setRunning(on: boolean) {
}
playPauseBtn.onclick = () => setRunning(!running);
stepBtn.onclick = () => {
stepSimulation();
};
resetSimBtn.onclick = () => {
// Stop if running
if (running) setRunning(false);
// Reset
resetSimulation();
// Optional: re-enable Step after reset
stepBtn.disabled = false;
};

View file

@ -5,7 +5,6 @@ import {
keymap,
hoverTooltip,
Decoration,
ViewPlugin,
lineNumbers,
highlightActiveLineGutter,
highlightActiveLine
@ -18,12 +17,10 @@ import { closeBrackets } from "npm:@codemirror/autocomplete";
import wasm from "./wasm.ts"
import { terminalPlugin } from "./terminal.ts";
import { setAutomaton } from "./visualizer.ts";
import { machine_from_json } from "./automata.ts";
import { sharedText } from "./share.ts";
import { examples } from "./examples.ts";
import { bus } from "./bus.ts";
function tokenize(text: string) {
@ -45,31 +42,26 @@ function compile(text: string): wasm.CompileResult {
}
}
export const analysisField = StateField.define({
const eventBusConnection = StateField.define({
create(state) {
const text = state.doc.toString();
bus.emit("editor/change", {text, doc: state.doc});
return buildAnalysis(text, state.doc);
},
update(value, tr) {
if (!tr.docChanged) return value;
const text = tr.state.doc.toString();
bus.emit("editor/change", {text, doc: state.doc});
return buildAnalysis(text, tr.state.doc);
},
provide: (f) => EditorView.decorations.from(f, (v) => v.deco),
});
function buildAnalysis(text: string, doc: Text) {
save(text);
const tokens = tokenize(text);
const { log, log_formatted, graph } = compile(text);
const { log, ansi_log, machine } = compile(text);
if (graph){
try{
setAutomaton(machine_from_json(graph))
}catch(e){
console.log(e);
}
}
bus.emit("compiled", {log, ansi_log, machine})
const marks = [];
const docLen = doc.length;
@ -101,7 +93,7 @@ function buildAnalysis(text: string, doc: Text) {
}
const deco = Decoration.set(marks, true);
return { tokens, log, log_formatted, deco };
return { tokens, log, ansi_log, deco };
}
const tokenClass = (t: string) =>
@ -136,7 +128,7 @@ function sevRank(sev: string) {
// ===================== Hover tooltip (uses cached diags) =====================
const diagHover = hoverTooltip((view, pos) => {
const { log } = view.state.field(analysisField);
const { log } = view.state.field(eventBusConnection);
const hits = log.filter((d) => d.start !== undefined && d.end !== undefined && pos >= d.start && pos <= d.end);
if (hits.length === 0) return null;
@ -187,7 +179,7 @@ export function getText(): string{
}
const state = EditorState.create({
doc: sharedText() ?? getSaved() ?? examples[0].machine,
doc: "",
extensions: [
lineNumbers(),
highlightActiveLineGutter(),
@ -198,9 +190,8 @@ const state = EditorState.create({
closeBrackets(),
keymap.of([...defaultKeymap, ...historyKeymap]),
analysisField,
eventBusConnection,
diagHover,
terminalPlugin,
EditorView.lineWrapping,
],
@ -210,3 +201,5 @@ const editor = new EditorView({
state,
parent: document.getElementById("editor")!,
});
bus.on("begin", _ => setText(sharedText() ?? getSaved() ?? examples[0].machine))

View file

@ -10,9 +10,9 @@ export type Category =
| "NTM";
export class Example {
category: Category;
title: string;
machine: string;
readonly category: Category;
readonly title: string;
readonly machine: string;
constructor(category: Category, title: string, machine: string) {
this.category = category;
@ -21,7 +21,7 @@ export class Example {
}
}
export const examples: Example[] = [
export const examples: readonly Example[] = [
new Example(
"Tutorial",
"DFA",
@ -104,9 +104,40 @@ d(qeq, b, z0) = (qmb, z0)
d(qmb, b, z0) = (qmb, z0)`,
),
new Example(
"NPDA",
"unequal",
"palindrome",
`type=NPDA
Q = {q0, q1} // states
E = {a, b} // alphabet
T = {z0, A, B} // stack
q0 = q0
z0 = z0
// push letters we see to stack
d(q0, a, z0) = (q0, [A z0])
d(q0, b, z0) = (q0, [B z0])
d(q0, a, A) = (q0, [A A])
d(q0, b, A) = (q0, [B A])
d(q0, a, B) = (q0, [A B])
d(q0, b, B) = (q0, [B B])
// transition to q1
d(q0, epsilon, z0) = { (q1, z0) }
d(q0, epsilon, A) = { (q1, A) }
d(q0, epsilon, B) = { (q1, B) }
// consume stack until empty
d(q1, a, A) = { (q1, epsilon) }
d(q1, b, B) = { (q1, epsilon) }`,
),
new Example(
"NPDA",
"kleen star stack",
`type=NPDA
Q = {q0, q1} // states
E = {a, b} // alphabet
@ -143,7 +174,7 @@ const CATEGORY_ORDER: Category[] = [
function buildExamplesDropdown(
selectEl: HTMLSelectElement,
examples: Example[],
examples: readonly Example[],
onPick?: (ex: Example) => void,
) {
// Clear everything except the first placeholder option (if present)

View file

@ -1,7 +1,11 @@
import "./editor.ts"
import "./visualizer.ts"
import { bus } from "./bus.ts";
import "./splitters.ts"
import "./controls.ts"
import "./theme.ts"
import "./share.ts"
import "./examples.ts"
import "./visualizer.ts"
import "./editor.ts"
import "./simulation.ts"
bus.emit("begin", undefined);

325
web/root/src/simulation.ts Normal file
View file

@ -0,0 +1,325 @@
import { bus } from "./bus.ts";
import {
Fa,
Machine,
parse_machine_from_json,
Pda,
State,
Symbol,
Tm,
} from "./automata.ts";
export type SimStepResult = "pending" | "accept" | "reject";
export type Sim = FaSim | PdaSim | TmSim;
let simulation: Sim | null = null;
let automaton: Machine = {
type: "fa",
alphabet: new Map(),
final_states: new Map(),
initial_state: "",
states: new Map(),
transitions: new Map(),
transitions_components: new Map(),
edges: new Map(),
};
bus.on("compiled", ({ machine }) => {
if (machine) {
try {
bus.emit("controls/clear_simulation", undefined);
automaton = parse_machine_from_json(machine);
bus.emit("automata/update", { automaton });
} catch (e) {
console.log(e);
}
}
});
bus.on("controls/clear_simulation", (_) => {
simulation = null;
bus.emit("automata/sim/update", { simulation: null });
});
bus.on("controls/step_simulation", (_) => {
if (simulation) {
bus.emit("automata/sim/before_step", { simulation });
bus.emit("automata/sim/after_step", {
result: simulation.step(),
simulation: simulation,
});
}
});
const machineInput = document.getElementById("machineInput") as HTMLInputElement;
machineInput.addEventListener("input", () => bus.emit("automata/sim/update", {simulation: null}));
machineInput.addEventListener("keydown", (e) => {
if (e.key === "Enter") {
bus.emit("controls/reload_simulation", undefined)
}
});
bus.on("controls/reload_simulation", (_) => {
const input = machineInput.value;
switch (automaton.type) {
case "fa":
simulation = new FaSim(automaton as Fa, input);
break;
case "pda":
simulation = new PdaSim(automaton as Pda, input);
break;
case "tm":
simulation = new TmSim(automaton as Tm, input);
break;
}
bus.emit("automata/sim/update", { simulation });
});
const simulationStatus = document.getElementById("simulationStatus") as HTMLInputElement;
bus.on("automata/sim/update", ({simulation}) => {
if (!simulation){
simulationStatus.innerText = "N/A"
simulationStatus.style.color = "var(--fg-2)";
}else{
simulationStatus.innerText = "Pending"
simulationStatus.style.color = "var(--warning)";
}
});
bus.on("automata/sim/after_step", ({result}) => {
if (result === "pending"){
simulationStatus.innerText = "Pending"
simulationStatus.style.color = "var(--warning)";
}else if (result==="accept"){
simulationStatus.innerText = "Accepted"
simulationStatus.style.color = "var(--success)";
}else if (result==="reject"){
simulationStatus.innerText = "Rejected"
simulationStatus.style.color = "var(--error)";
}
});
export class FaState {
readonly state: State;
readonly position: number;
readonly input: string;
readonly accepted: boolean = false;
private repr!: string;
constructor(state: State, position: number, input: string) {
this.state = state;
this.position = position;
this.input = input;
}
toString(): string {
if (!this.repr) {
this.repr = this.state + +" >" + this.input.substring(this.position);
}
return this.repr;
}
}
export class FaSim {
machine: Fa;
paths: FaState[];
input: string;
current_states: Map<string, FaState[]> = new Map();
accepted: FaState[] = [];
constructor(machine: Fa, input: string) {
this.machine = machine;
this.paths = [new FaState(machine.initial_state, 0, input)];
this.current_states.set(machine.initial_state, [this.paths[0]]);
this.input = input;
}
step(): SimStepResult {
if (this.paths.length == 0) return "reject";
if (this.accepted.length != 0) return "accept";
const paths: FaState[] = [];
this.current_states.clear();
const push = (state: FaState) => {
paths.push(state);
if (!this.current_states.has(state.state)) {
this.current_states.set(state.state, []);
}
this.current_states.get(state.state)?.push(state);
if (
state.position == this.input.length &&
this.machine.final_states.has(state.state)
) {
// @ts-expect-error sillllyyyy
state.accepted = true;
this.accepted.push(state);
}
};
for (const path of this.paths) {
const letter_map = this.machine.transitions_components.get(path.state)!;
if (!letter_map) continue;
for (const to of letter_map.get(null) ?? []) {
push(new FaState(to.state, path.position, this.input));
}
if (path.position >= this.input.length) continue;
const char = this.input.charAt(path.position);
for (const to of letter_map.get(char) ?? []) {
push(new FaState(to.state, path.position + 1, this.input));
}
}
this.paths = paths;
if (this.paths.length == 0) return "reject";
if (this.accepted.length != 0) return "accept";
return "pending";
}
}
export class PdaState {
readonly state: State;
readonly stack: Symbol[];
readonly position: number;
readonly input: string;
readonly accepted: boolean = false;
private repr!: string;
constructor(state: State, stack: Symbol[], position: number, input: string) {
this.state = state;
this.stack = stack;
this.position = position;
this.input = input;
}
toString(): string {
if (!this.repr) {
this.repr = this.state + " [" + this.stack + "]" + " >" +
this.input.substring(this.position);
}
return this.repr;
}
}
export class PdaSim {
machine: Pda;
paths: PdaState[];
input: string;
current_states: Map<string, PdaState[]> = new Map();
accepted: PdaState[] = [];
constructor(machine: Pda, input: string) {
this.machine = machine;
this.paths = [
new PdaState(machine.initial_state, [machine.initial_stack], 0, input),
];
this.current_states.set(machine.initial_state, [this.paths[0]]);
this.input = input;
}
step(): SimStepResult {
if (this.paths.length == 0) return "reject";
if (this.accepted.length != 0) return "accept";
const paths: PdaState[] = [];
this.current_states.clear();
const push = (state: PdaState) => {
paths.push(state);
if (!this.current_states.has(state.state)) {
this.current_states.set(state.state, []);
}
this.current_states.get(state.state)?.push(state);
if (
state.position == this.input.length && this.machine.final_states &&
this.machine.final_states.has(state.state) ||
state.position == this.input.length && !this.machine.final_states &&
state.stack.length == 1 &&
state.stack[0] == this.machine.initial_stack
) {
// @ts-expect-error sillllyyyy
state.accepted = true;
this.accepted.push(state);
}
};
for (const path of this.paths) {
const stack = path.stack.pop()!;
const letter_map = this.machine.transitions_components.get(path.state)
?.get(stack);
if (!letter_map) continue;
for (const to of letter_map.get(null) ?? []) {
push(
new PdaState(
to.state,
path.stack.concat(to.stack),
path.position,
this.input,
),
);
}
if (path.position >= this.input.length) continue;
const char = this.input.charAt(path.position);
for (const to of letter_map.get(char) ?? []) {
push(
new PdaState(
to.state,
path.stack.concat(to.stack),
path.position + 1,
this.input,
),
);
}
}
this.paths = paths;
if (this.paths.length == 0) return "reject";
if (this.accepted.length != 0) return "accept";
return "pending";
}
}
export class TmState {
readonly state: State;
readonly tape: Symbol[];
readonly position: number;
readonly input: string;
readonly accepted: boolean = false;
private repr!: string;
constructor(state: State, tape: Symbol[], position: number, input: string) {
this.state = state;
this.tape = tape;
this.position = position;
this.input = input;
}
toString(): string {
if (!this.repr) this.repr = this.state + " " + this.position;
return this.repr;
}
}
export class TmSim {
machine: Tm;
input: string;
current_states: Map<string, TmState[]> = new Map();
accepted: TmState[] = [];
constructor(machine: Tm, input: string) {
this.machine = machine;
this.input = input;
}
step(): SimStepResult {
return "pending";
}
}

View file

@ -63,7 +63,7 @@ function setFlexFill(pane: HTMLElement) {
pane.style.flex = "1 1 auto";
}
export function enableFlexSplitters() {
function enableFlexSplitters() {
// Horizontal: A | hSplit | B (top/split/bottom)
for (const splitter of document.querySelectorAll<HTMLElement>(".hSplit:not(.styleOnly)")) {
const parent = splitter.parentElement as HTMLElement | null;

View file

@ -1,10 +1,14 @@
// deno-lint-ignore-file
import { bus } from "./bus.ts";
import {
ViewPlugin,
} from "npm:@codemirror/view";
bus.on("compiled", ({log, ansi_log}) => {
const term = document.getElementById("terminal");
if (!term) return;
import { analysisField } from "./editor.ts";
let s = "";
s += `\x1b[90m[compile]\x1b[0m ${log.length} diagnostics\n`;
term.innerHTML = ansiToHtml(s + ansi_log);
})
function escapeHtml(s: string) {
return s
@ -78,32 +82,3 @@ function ansiToHtml(input: string) {
out += openSpanIfNeeded(input.slice(lastIndex));
return out;
}
// @ts-expect-error bad library
function formatTerminal(view) {
const term = document.getElementById("terminal");
if (!term) return;
const { log, log_formatted } = view.state.field(analysisField);
let s = "";
s += `\x1b[90m[compile]\x1b[0m ${log.length} diagnostics\n`;
term.innerHTML = ansiToHtml(s + log_formatted);
}
export const terminalPlugin = ViewPlugin.fromClass(
class {
// @ts-expect-error bad library
constructor(view) {
// @ts-expect-error bad library
this.view = view;
formatTerminal(view);
}
// @ts-expect-error bad library
update(update) {
if (update.docChanged) formatTerminal(update.view);
}
}
);

View file

@ -1,4 +1,4 @@
import { updateGraphTheme } from "./visualizer.ts";
import { bus } from "./bus.ts";
const themeBtn = document.getElementById("themeToggle") as HTMLButtonElement;
@ -22,11 +22,11 @@ function setTheme(theme: Theme) {
// update button label
themeBtn.textContent = theme === "dark" ? "🌙 Dark" : "☀️ Light";
updateGraphTheme();
bus.emit("theme/update", undefined);
}
setTheme(getPreferredTheme());
bus.on("begin", _ => setTheme(getPreferredTheme()))
themeBtn.addEventListener("click", toggleTheme);
function toggleTheme() {
@ -34,8 +34,6 @@ function toggleTheme() {
setTheme(current === "dark" ? "light" : "dark");
}
globalThis.window.matchMedia?.("(prefers-color-scheme: light)")
?.addEventListener("change", () => {
if (localStorage.getItem("theme")) return;

View file

@ -1,13 +1,119 @@
// deno-lint-ignore-file no-unversioned-import
// deno-lint-ignore no-import-prefix
import * as vis from "npm:vis-network/standalone";
import { StateEffect } from "npm:@codemirror/state";
import { Machine } from "./automata.ts";
import { getText } from "./editor.ts";
export const nodes = new vis.DataSet<vis.Node>();
export const edges = new vis.DataSet<vis.Edge>();
import { bus } from "./bus.ts";
import type { Sim } from "./simulation.ts";
import type { Machine } from "./automata.ts";
bus.on("controls/physics", ({enabled}) => {
network.setOptions({ physics: { enabled } });
network.setOptions({edges: {smooth: enabled}});
});
bus.on("controls/reset_network", _ => {
try {
nodes.forEach((n) => {
n.physics = true;
n.x = undefined;
n.y = undefined;
});
network.setData({ nodes, edges });
} catch {
// Last resort
network.setData({ nodes, edges });
}
});
bus.on("automata/sim/after_step", _ => {
network.redraw();
});
let simulation: Sim | null = null;
bus.on("automata/sim/update", ({simulation: sim}) => {
simulation = sim;
network.redraw();
});
let automaton: Machine
bus.on("automata/update", ({automaton: auto}) => {
automaton = auto;
// Populate nodes
for (const state of automaton.states.keys()) {
const size = measureTextWidth(state, getGraphTheme().node_font)/2+10
if (nodes.get(state)) {
nodes.update({
id: state,
label: state,
size
});
} else {
nodes.add({
id: state,
label: state,
size
});
}
}
// Populate edges
for (const [edge_id, transitions] of automaton.edges) {
const to_from = edge_id.split("#");
const vadjust = -getGraphTheme().edge_font_size *
Math.floor(transitions.length / 2);
const font = {
vadjust,
bold: {
vadjust
}
};
if (edges.get(edge_id)) {
edges.update({
id: edge_id,
font,
from: to_from[0],
to: to_from[1],
label: transitions.map(i => i.repr).join(automaton.type=="fa"?",":"\n"),
});
} else {
edges.add({
id: edge_id,
font,
from: to_from[0],
to: to_from[1],
label: transitions.map(i => i.repr).join(automaton.type=="fa"?",":"\n"),
});
}
}
// delete old edges
for (const edge_id of edges.getIds()) {
if (!automaton.edges.has(edge_id as string)) {
edges.remove(edge_id);
}
}
// delete old nodes
for (const node_id of nodes.getIds()) {
if (!automaton.states.has(node_id as string)) {
nodes.remove(node_id);
}
}
});
const nodes = new vis.DataSet<vis.Node>();
const edges = new vis.DataSet<vis.Edge>();
let _graphTheme: GraphTheme | null = null;
bus.on("theme/update", _ => {
_graphTheme = null;
updateGraphTheme()
});
type Color = string;
type GraphTheme = {
@ -37,12 +143,6 @@ type GraphTheme = {
edge_font_bold: string,
};
let _graphTheme: GraphTheme | null = null;
function invalidateGraphThemeCache() {
_graphTheme = null;
}
function getGraphTheme(): GraphTheme {
function cssVar(name: string, fallback = ""): string {
return getComputedStyle(document.documentElement)
@ -82,8 +182,7 @@ function getGraphTheme(): GraphTheme {
return _graphTheme;
}
export function updateGraphTheme() {
invalidateGraphThemeCache();
function updateGraphTheme() {
const gt = getGraphTheme();
network.setOptions({
@ -122,37 +221,13 @@ export function updateGraphTheme() {
},
});
setAutomaton(automaton)
}
let automaton: Machine = {
type: "fa",
alphabet: new Map(),
final_states: new Map(),
initial_state: "",
states: new Map(),
transitions: new Map(),
transitions_components: new Map(),
edges: new Map(),
};
export function clearAutomaton() {
automaton = {
type: "fa",
alphabet: new Map(),
final_states: new Map(),
initial_state: "",
states: new Map(),
transitions: new Map(),
transitions_components: new Map(),
edges: new Map(),
};
network.redraw();
}
let _measureCanvas: HTMLCanvasElement | null = null;
export function measureTextWidth(text: string, font: string): number {
function measureTextWidth(text: string, font: string): number {
if (!_measureCanvas) {
_measureCanvas = document.createElement("canvas");
}
@ -163,71 +238,6 @@ export function measureTextWidth(text: string, font: string): number {
return ctx.measureText(text).width;
}
export function setAutomaton(auto: Machine) {
automaton = auto;
// Populate nodes
for (const state of automaton.states.keys()) {
const size = measureTextWidth(state, getGraphTheme().node_font)/2+10
if (nodes.get(state)) {
nodes.update({
id: state,
label: state,
size
});
} else {
nodes.add({
id: state,
label: state,
size
});
}
}
// Populate edges
for (const [edge_id, transitions] of auto.edges) {
const to_from = edge_id.split("#");
const vadjust = -getGraphTheme().edge_font_size *
Math.floor(transitions.length / 2);
const font = {
vadjust,
bold: {
vadjust
}
};
if (edges.get(edge_id)) {
edges.update({
id: edge_id,
font,
from: to_from[0],
to: to_from[1],
label: transitions.map(i => i.repr).join(auto.type=="fa"?",":"\n"),
});
} else {
edges.add({
id: edge_id,
font,
from: to_from[0],
to: to_from[1],
label: transitions.map(i => i.repr).join(auto.type=="fa"?",":"\n"),
});
}
}
for (const edge_id of edges.getIds()) {
if (!auto.edges.has(edge_id as string)) {
edges.remove(edge_id);
}
}
for (const node_id of nodes.getIds()) {
if (!auto.states.has(node_id as string)) {
nodes.remove(node_id);
}
}
}
function chosen_edge(
_: vis.ChosenNodeValues,
id: vis.IdType,
@ -244,7 +254,7 @@ function chosen_node(
) {
}
export const network: vis.Network = createGraph();
const network: vis.Network = createGraph();
function createGraph(): vis.Network {
const container = document.getElementById("graph")!;
@ -306,6 +316,7 @@ function createGraph(): vis.Network {
return network;
}
function renderNode({
ctx,
id,
@ -324,7 +335,7 @@ function renderNode({
const isFinal = automaton.final_states
? automaton.final_states.has(id)
: false;
const isActive = false;
const isActive = simulation?simulation.current_states.has(id):false;
const fill = selected ? t.bg_2 : hover ? t.bg_1 : t.bg_0;
const stroke = isActive ? t.current_node_border : t.node_border;
@ -366,34 +377,33 @@ function renderNode({
drawInitialArrow(ctx, x, y, r, t.edge);
}
// const badgeText = "bleh\npee";
// if (badgeText) {
// const lines = badgeText.split("\n").slice(0, 3);
// const padX = 8;
// const padY = 6;
// const lineH = 14;
if (isActive) {
const paths = simulation?.current_states.get(id)!;
const padX = 8;
const padY = 6;
const lineH = 14;
// let w = 0;
// for (const ln of lines) w = Math.max(w, ctx.measureText(ln).width);
// const boxW = w + padX * 2;
// const boxH = lines.length * lineH + padY * 2;
let w = 0;
for (const ln of paths) w = Math.max(w, ctx.measureText(ln.toString()).width);
const boxW = w + padX * 2;
const boxH = paths.length * lineH + padY * 2;
// const bx = x - boxW / 2;
// const by = y - r - 12 - boxH;
const bx = x - boxW / 2;
const by = y - r - 12 - boxH;
// ctx.fillStyle = t.bg_1;
// ctx.strokeStyle = t.bg_2;
// ctx.lineWidth = 1;
// roundRect(ctx, bx, by, boxW, boxH, 8);
// ctx.fill();
// ctx.stroke();
ctx.fillStyle = t.bg_1;
ctx.strokeStyle = t.bg_2;
ctx.lineWidth = 1;
roundRect(ctx, bx, by, boxW, boxH, 8);
ctx.fill();
ctx.stroke();
// ctx.fillStyle = t.fg_0;
// ctx.textBaseline = "top";
// for (let i = 0; i < lines.length; i++) {
// ctx.fillText(lines[i], x, by + padY + i * lineH);
// }
// }
ctx.textBaseline = "top";
for (let i = 0; i < paths.length; i++) {
ctx.fillStyle = paths[i].accepted?t.current_node_border:t.fg_0;
ctx.fillText(paths[i].toString(), x, by + padY + i * lineH);
}
}
const node: vis.Node = nodes.get(id)!;
const physicsOff = node.physics === false;

View file

@ -52,27 +52,45 @@
}
}
.btn-blue {
background: color-mix(in srgb, var(--accent) 14%, transparent);
border-color: color-mix(in srgb, var(--accent) 40%, transparent);
.btn-yellow {
background: color-mix(in srgb, var(--warning) 14%, transparent);
border-color: color-mix(in srgb, var(--warning) 40%, transparent);
&:hover {
background: color-mix(in srgb, var(--accent) 22%, transparent);
background: color-mix(in srgb, var(--warning) 22%, transparent);
}
}
.btn-blue {
background: color-mix(in srgb, var(--focus) 14%, transparent);
border-color: color-mix(in srgb, var(--focus) 40%, transparent);
&:hover {
background: color-mix(in srgb, var(--focus) 22%, transparent);
}
}
.btn-grey {
background: color-mix(in srgb, var(--accent) 12%, transparent);
border-color: color-mix(in srgb, var(--accent) 28%, transparent);
background: color-mix(in srgb, var(--ansi-fg-90) 12%, transparent);
border-color: color-mix(in srgb, var(--ansi-fg-90) 28%, transparent);
&:hover {
background: color-mix(in srgb, var(--accent) 18%, transparent);
background: color-mix(in srgb, var(--ansi-fg-90) 18%, transparent);
}
}
.btn-red {
background: color-mix(in srgb, var(--error) 12%, transparent);
border-color: color-mix(in srgb, var(--error) 28%, transparent);
&:hover {
background: color-mix(in srgb, var(--error) 18%, transparent);
}
}
.btn-toggle.active {
background: color-mix(in srgb, var(--warning) 14%, transparent);
border-color: color-mix(in srgb, var(--warning) 30%, transparent);
background: color-mix(in srgb, var(--success) 14%, transparent);
border-color: color-mix(in srgb, var(--success) 30%, transparent);
}
@ -97,3 +115,33 @@
text-align: right;
opacity: 0.9;
}
.test-input {
width: 100%;
max-width: 420px;
align-self: center;
padding: 10px 14px;
border-radius: 12px;
border: 1px solid var(--bg-1);
background: var(--bg-2);
font: var(--font-ui);
color: var(--fg-0);
outline: none;
transition: border-color 150ms ease, box-shadow 150ms ease;
}
.test-input::placeholder {
color: var(--fg-0);
}
.test-input:focus {
border-color: var(--accent);
box-shadow: 0 0 0 3px var(--accent);
}

View file

@ -31,7 +31,6 @@
.cm-lineNumbers .cm-gutterElement {
padding: 0 10px 0 6px;
font-family: var(--font-mono);
font-size: 12px;
}
.cm-activeLine {

View file

@ -11,6 +11,7 @@ body {
margin: 0;
color: var(--fg-0);
font-family: var(--font-ui);
font-size: 14px;
background: #909090;
}
@ -103,6 +104,7 @@ body {
border-radius: 12px;
border: 1px solid var(bg-1);
background: var(--bg-2);
font: var(--font-ui)
}
.share-toast {

View file

@ -4,7 +4,6 @@
padding: 1em;
margin: 0px;
font-family: var(--font-mono);
font-size: 12.5px;
line-height: 1.35;
white-space: pre-wrap;
word-break: break-word;

View file

@ -152,8 +152,8 @@ pub struct Graph<'a> {
#[wasm_bindgen(getter_with_clone)]
pub struct CompileResult {
pub log: Vec<CompileLog>,
pub log_formatted: String,
pub graph: Option<String>,
pub ansi_log: String,
pub machine: Option<String>,
}
#[wasm_bindgen]
@ -161,10 +161,10 @@ pub fn compile(input: &str) -> CompileResult {
let mut ctx = Context::new(input);
let result = automata::loader::parse_universal(&mut ctx);
let graph = result.map(|result| serde_json::to_string(&result).unwrap());
let machine = result.map(|result| serde_json::to_string(&result).unwrap());
use std::fmt::Write;
let log_formatted = ctx.logs_display().fold(String::new(), |mut s, e| {
let ansi_log = ctx.logs_display().fold(String::new(), |mut s, e| {
write!(&mut s, "{e}").unwrap();
s
});
@ -190,7 +190,7 @@ pub fn compile(input: &str) -> CompileResult {
CompileResult {
log,
log_formatted,
graph,
ansi_log,
machine,
}
}