191 lines
8.2 KiB
TypeScript
191 lines
8.2 KiB
TypeScript
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/**
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* LogicGateElements.ts — Custom Web Components for standard logic gates.
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*
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* Implements SVG-rendered logic gate elements for use in the Velxio simulator.
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* These do NOT exist in wokwi-elements, so we define them here.
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*
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* Tags defined:
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* wokwi-logic-and — 2-input AND gate
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* wokwi-logic-nand — 2-input NAND gate
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* wokwi-logic-or — 2-input OR gate
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* wokwi-logic-nor — 2-input NOR gate
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* wokwi-logic-xor — 2-input XOR gate
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* wokwi-logic-not — 1-input NOT (inverter)
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*
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* Pin layout (in CSS pixels, used by PinOverlay):
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* 2-input gates (72 × 48 px): A(0,14) B(0,34) Y(72,24)
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* NOT gate (56 × 36 px): A(0,18) Y(56,18)
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*/
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// ─── Shared colours ───────────────────────────────────────────────────────────
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const FILL = '#e8f0fa';
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const STROKE = '#3360b0';
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const LEAD = '#555555';
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const TEXT = '#1a3060';
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const STYLE = ':host{display:inline-block;line-height:0}';
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// ─── 2-input gate base ───────────────────────────────────────────────────────
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function twoInputPinInfo() {
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return [
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{ name: 'A', x: 0, y: 14, number: 1, signals: [] },
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{ name: 'B', x: 0, y: 34, number: 2, signals: [] },
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{ name: 'Y', x: 72, y: 24, number: 3, signals: [] },
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];
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}
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function leads2Input(): string {
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return `
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<line x1="0" y1="14" x2="20" y2="14" stroke="${LEAD}" stroke-width="2"/>
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<line x1="0" y1="34" x2="20" y2="34" stroke="${LEAD}" stroke-width="2"/>`;
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}
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function outputLead(fromX: number): string {
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return `<line x1="${fromX}" y1="24" x2="72" y2="24" stroke="${LEAD}" stroke-width="2"/>`;
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}
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function bubbleAndLead(bubbleCx: number): string {
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const r = 4;
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const lineStart = bubbleCx + r;
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return `<circle cx="${bubbleCx}" cy="24" r="${r}" fill="${FILL}" stroke="${STROKE}" stroke-width="1.5"/>
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<line x1="${lineStart}" y1="24" x2="72" y2="24" stroke="${LEAD}" stroke-width="2"/>`;
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}
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function label(x: number, y: number, text: string): string {
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return `<text x="${x}" y="${y}" font-family="sans-serif" font-size="10" fill="${TEXT}" font-weight="bold">${text}</text>`;
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}
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// ─── AND Gate (72×48) ─────────────────────────────────────────────────────────
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// Body: rectangle (20-42,6-42) + semicircle arc right side (radius 18, tip at x=60)
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class AndGateElement extends HTMLElement {
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readonly pinInfo = twoInputPinInfo();
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constructor() {
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super();
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this.attachShadow({ mode: 'open' }).innerHTML = `
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<style>${STYLE}</style>
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<svg width="72" height="48" xmlns="http://www.w3.org/2000/svg">
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${leads2Input()}
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<path d="M20,6 L42,6 A18,18 0 0,1 42,42 L20,42 Z"
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fill="${FILL}" stroke="${STROKE}" stroke-width="1.5"/>
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${outputLead(60)}
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${label(26, 28, '&')}
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</svg>`;
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}
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}
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// ─── NAND Gate (72×48) ────────────────────────────────────────────────────────
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// AND body + inversion bubble at output (cx=64, r=4 → spans x60-x68)
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class NandGateElement extends HTMLElement {
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readonly pinInfo = twoInputPinInfo();
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constructor() {
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super();
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this.attachShadow({ mode: 'open' }).innerHTML = `
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<style>${STYLE}</style>
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<svg width="72" height="48" xmlns="http://www.w3.org/2000/svg">
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${leads2Input()}
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<path d="M20,6 L42,6 A18,18 0 0,1 42,42 L20,42 Z"
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fill="${FILL}" stroke="${STROKE}" stroke-width="1.5"/>
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${bubbleAndLead(64)}
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${label(26, 28, '&')}
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</svg>`;
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}
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}
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// ─── OR Gate (72×48) ──────────────────────────────────────────────────────────
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// Body: Q-bezier — top curve, bottom curve, concave left side
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// Tip at (54,24); output line from 54→72
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class OrGateElement extends HTMLElement {
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readonly pinInfo = twoInputPinInfo();
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constructor() {
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super();
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this.attachShadow({ mode: 'open' }).innerHTML = `
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<style>${STYLE}</style>
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<svg width="72" height="48" xmlns="http://www.w3.org/2000/svg">
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${leads2Input()}
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<path d="M18,6 Q50,6 54,24 Q50,42 18,42 Q26,24 18,6 Z"
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fill="${FILL}" stroke="${STROKE}" stroke-width="1.5"/>
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${outputLead(54)}
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${label(25, 28, '≥1')}
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</svg>`;
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}
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}
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// ─── NOR Gate (72×48) ─────────────────────────────────────────────────────────
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// OR body + inversion bubble at output (cx=58, r=4 → spans x54-x62)
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class NorGateElement extends HTMLElement {
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readonly pinInfo = twoInputPinInfo();
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constructor() {
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super();
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this.attachShadow({ mode: 'open' }).innerHTML = `
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<style>${STYLE}</style>
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<svg width="72" height="48" xmlns="http://www.w3.org/2000/svg">
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${leads2Input()}
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<path d="M18,6 Q50,6 54,24 Q50,42 18,42 Q26,24 18,6 Z"
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fill="${FILL}" stroke="${STROKE}" stroke-width="1.5"/>
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${bubbleAndLead(58)}
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${label(25, 28, '≥1')}
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</svg>`;
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}
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}
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// ─── XOR Gate (72×48) ─────────────────────────────────────────────────────────
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// OR body + extra curved line to the left (the XOR distinguishing mark)
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class XorGateElement extends HTMLElement {
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readonly pinInfo = twoInputPinInfo();
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constructor() {
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super();
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this.attachShadow({ mode: 'open' }).innerHTML = `
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<style>${STYLE}</style>
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<svg width="72" height="48" xmlns="http://www.w3.org/2000/svg">
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${leads2Input()}
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<!-- XOR extra curve (3px left of OR left side) -->
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<path d="M14,6 Q22,24 14,42"
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fill="none" stroke="${STROKE}" stroke-width="1.5"/>
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<!-- OR body -->
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<path d="M18,6 Q50,6 54,24 Q50,42 18,42 Q26,24 18,6 Z"
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fill="${FILL}" stroke="${STROKE}" stroke-width="1.5"/>
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${outputLead(54)}
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${label(24, 28, '=1')}
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</svg>`;
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}
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}
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// ─── NOT Gate (56×36) ─────────────────────────────────────────────────────────
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// Triangle pointing right + inversion bubble at tip
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// Input A(0,18) → triangle base at x=4, tip at x=44
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// Bubble cx=48,r=4 → extends to x=52; output lead x52→56; Pin Y(56,18)
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class NotGateElement extends HTMLElement {
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readonly pinInfo = [
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{ name: 'A', x: 0, y: 18, number: 1, signals: [] },
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{ name: 'Y', x: 56, y: 18, number: 2, signals: [] },
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];
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constructor() {
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super();
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this.attachShadow({ mode: 'open' }).innerHTML = `
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<style>${STYLE}</style>
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<svg width="56" height="36" xmlns="http://www.w3.org/2000/svg">
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<line x1="0" y1="18" x2="4" y2="18" stroke="${LEAD}" stroke-width="2"/>
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<path d="M4,4 L44,18 L4,32 Z"
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fill="${FILL}" stroke="${STROKE}" stroke-width="1.5"/>
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<circle cx="48" cy="18" r="4" fill="${FILL}" stroke="${STROKE}" stroke-width="1.5"/>
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<line x1="52" y1="18" x2="56" y2="18" stroke="${LEAD}" stroke-width="2"/>
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${label(10, 22, '1')}
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</svg>`;
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}
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}
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// ─── Register custom elements ─────────────────────────────────────────────────
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if (!customElements.get('wokwi-logic-and')) customElements.define('wokwi-logic-and', AndGateElement);
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if (!customElements.get('wokwi-logic-nand')) customElements.define('wokwi-logic-nand', NandGateElement);
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if (!customElements.get('wokwi-logic-or')) customElements.define('wokwi-logic-or', OrGateElement);
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if (!customElements.get('wokwi-logic-nor')) customElements.define('wokwi-logic-nor', NorGateElement);
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if (!customElements.get('wokwi-logic-xor')) customElements.define('wokwi-logic-xor', XorGateElement);
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if (!customElements.get('wokwi-logic-not')) customElements.define('wokwi-logic-not', NotGateElement);
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