Files
computing-box/src/scripts/logicGates.js
Alexander Lyall f70120c2a0 feat(app): update branding, improve button animations, and complete PC Components simulator
- Replace logo with updated Computing:Box branding assets
- Fix animations for Random and Reset buttons for smoother interaction
- Implement full first version of the PC Components simulator
- Update built output to reflect new assets, layout, and functionality
- Remove legacy assets and outdated build files

Signed-off-by: Alexander Lyall <alex@adcm.uk>
2026-03-30 18:54:23 +01:00

555 lines
21 KiB
JavaScript

// src/scripts/logicGates.js
// Computing:Box — Drag & Drop Logic Builder
(() => {
/* --- DOM Elements --- */
const workspace = document.getElementById("workspace");
const viewport = document.getElementById("viewport");
const wireLayer = document.getElementById("wireLayer");
const ttContainer = document.getElementById("truthTableContainer");
const toolboxGrid = document.getElementById("toolboxGrid");
const btnClearBoard = document.getElementById("btnClearBoard");
const toolboxToggle = document.getElementById("toolboxToggle");
const logicPage = document.getElementById("logicPage");
/* --- ANSI Gate SVGs --- */
const GATE_SVGS = {
'AND': `<g stroke="#e8e8ee" stroke-width="3" fill="none"><path d="M0,15 L20,15 M0,35 L20,35 M70,25 L100,25"/><path d="M20,5 L50,5 A20,20 0 0 1 50,45 L20,45 Z" fill="var(--bg)"/></g>`,
'OR': `<g stroke="#e8e8ee" stroke-width="3" fill="none"><path d="M0,15 L26,15 M0,35 L26,35 M70,25 L100,25"/><path d="M20,5 Q55,5 70,25 Q55,45 20,45 Q40,25 20,5 Z" fill="var(--bg)"/></g>`,
'NOT': `<g stroke="#e8e8ee" stroke-width="3" fill="none"><path d="M0,25 L30,25 M71,25 L100,25"/><path d="M30,10 L60,25 L30,40 Z" fill="var(--bg)"/><circle cx="65.5" cy="25" r="4.5" fill="var(--bg)"/></g>`,
'NAND': `<g stroke="#e8e8ee" stroke-width="3" fill="none"><path d="M0,15 L20,15 M0,35 L20,35 M80,25 L100,25"/><path d="M20,5 L50,5 A20,20 0 0 1 50,45 L20,45 Z" fill="var(--bg)"/><circle cx="74.5" cy="25" r="4.5" fill="var(--bg)"/></g>`,
'NOR': `<g stroke="#e8e8ee" stroke-width="3" fill="none"><path d="M0,15 L26,15 M0,35 L26,35 M80,25 L100,25"/><path d="M20,5 Q55,5 70,25 Q55,45 20,45 Q40,25 20,5 Z" fill="var(--bg)"/><circle cx="74.5" cy="25" r="4.5" fill="var(--bg)"/></g>`,
'XOR': `<g stroke="#e8e8ee" stroke-width="3" fill="none"><path d="M0,15 L24,15 M0,35 L24,35 M75,25 L100,25"/><path d="M30,5 Q60,5 75,25 Q60,45 30,45 Q50,25 30,5 Z" fill="var(--bg)"/><path d="M20,5 Q40,25 20,45"/></g>`,
'XNOR': `<g stroke="#e8e8ee" stroke-width="3" fill="none"><path d="M0,15 L24,15 M0,35 L24,35 M85,25 L100,25"/><path d="M30,5 Q60,5 75,25 Q60,45 30,45 Q50,25 30,5 Z" fill="var(--bg)"/><path d="M20,5 Q40,25 20,45"/><circle cx="79.5" cy="25" r="4.5" fill="var(--bg)"/></g>`
};
const INPUT_SVG = `<svg class="lg-line-svg" viewBox="0 0 30 50"><path d="M0,25 L30,25" stroke="#e8e8ee" stroke-width="3" fill="none"/></svg>`;
const OUTPUT_SVG = `<svg class="lg-line-svg" viewBox="0 0 30 50"><path d="M0,25 L30,25" stroke="#e8e8ee" stroke-width="3" fill="none"/></svg>`;
/* --- State --- */
let nodes = {};
let connections = [];
let nextNodeId = 1;
let nextWireId = 1;
let discoveredStates = new Set();
// Interaction State
let isDraggingNode = null;
let dragOffset = { x: 0, y: 0 };
let clickStartX = 0, clickStartY = 0;
let wiringStart = null;
let tempWirePath = null;
let selectedWireId = null;
let selectedNodeId = null;
// Camera State (Pan & Zoom)
let panX = 0, panY = 0, zoom = 1;
let isPanning = false;
let panStart = { x: 0, y: 0 };
/* --- Setup Toolbox --- */
function initToolbox() {
if(!toolboxGrid) return;
let html = `
<div draggable="true" data-spawn="INPUT" class="drag-item tb-icon-box" title="Input Toggle">
<div class="switch" style="pointer-events:none;"><span class="slider"></span></div>
<div class="tb-icon-label">Input</div>
</div>
<div draggable="true" data-spawn="OUTPUT" class="drag-item tb-icon-box" title="Output Bulb">
<div class="bulb on" style="pointer-events:none; width:28px; height:28px;"><svg viewBox="0 0 24 24" fill="currentColor"><path d="M12 2.25a6.75 6.75 0 0 0-6.75 6.75c0 2.537 1.393 4.75 3.493 5.922l.507.282v1.546h5.5v-1.546l.507-.282A6.75 6.75 0 0 0 12 2.25Zm-2.25 16.5v.75a2.25 2.25 0 0 0 4.5 0v-.75h-4.5Z"/></svg></div>
<div class="tb-icon-label">Output</div>
</div>
`;
Object.keys(GATE_SVGS).forEach(gate => {
html += `
<div draggable="true" data-spawn="GATE" data-gate="${gate}" class="drag-item tb-icon-box" title="${gate} Gate">
<svg viewBox="0 0 100 50" style="width:50px; height:25px; pointer-events:none;">${GATE_SVGS[gate]}</svg>
<div class="tb-icon-label">${gate}</div>
</div>
`;
});
toolboxGrid.innerHTML = html;
document.querySelectorAll('.drag-item').forEach(item => {
item.addEventListener('dragstart', (e) => {
e.dataTransfer.setData('spawnType', item.dataset.spawn);
if(item.dataset.spawn === 'GATE') e.dataTransfer.setData('gateType', item.dataset.gate);
});
});
}
/* --- Camera Math --- */
function updateViewport() {
viewport.style.transform = `translate(${panX}px, ${panY}px) scale(${zoom})`;
workspace.style.backgroundSize = `${24 * zoom}px ${24 * zoom}px`;
workspace.style.backgroundPosition = `${panX}px ${panY}px`;
}
function zoomWorkspace(factor, mouseX, mouseY) {
const newZoom = Math.min(Math.max(0.2, zoom * factor), 3);
panX = mouseX - (mouseX - panX) * (newZoom / zoom);
panY = mouseY - (mouseY - panY) * (newZoom / zoom);
zoom = newZoom;
updateViewport();
}
function getPortCoords(nodeId, portDataAttr) {
const node = nodes[nodeId];
if (!node || !node.el) return {x:0, y:0};
const portEl = node.el.querySelector(`[data-port="${portDataAttr}"]`);
if (!portEl) return {x:0, y:0};
const wsRect = workspace.getBoundingClientRect();
const portRect = portEl.getBoundingClientRect();
// Calculate backwards through camera scale/pan to find true local coordinates
return {
x: (portRect.left - wsRect.left - panX + portRect.width / 2) / zoom,
y: (portRect.top - wsRect.top - panY + portRect.height / 2) / zoom
};
}
function drawBezier(x1, y1, x2, y2) {
const cpDist = Math.abs(x2 - x1) * 0.6 + 20;
return `M ${x1} ${y1} C ${x1 + cpDist} ${y1}, ${x2 - cpDist} ${y2}, ${x2} ${y2}`;
}
/* --- Rendering --- */
function renderWires() {
let svgHTML = '';
connections.forEach(conn => {
const from = getPortCoords(conn.fromNode, 'out');
const to = getPortCoords(conn.toNode, `in${conn.toPort}`);
const sourceNode = nodes[conn.fromNode];
const isActive = sourceNode && sourceNode.value === true;
const isSelected = conn.id === selectedWireId;
svgHTML += `<path class="lg-wire ${isActive ? 'active' : ''} ${isSelected ? 'selected' : ''}" d="${drawBezier(from.x, from.y, to.x, to.y)}" data-conn-id="${conn.id}" />`;
});
if (wiringStart && tempWirePath) {
svgHTML += `<path class="lg-wire lg-wire-temp" d="${drawBezier(wiringStart.x, wiringStart.y, tempWirePath.x, tempWirePath.y)}" />`;
}
wireLayer.innerHTML = svgHTML;
}
function updateNodePositions() {
Object.values(nodes).forEach(n => {
if (n.el) { n.el.style.left = `${n.x}px`; n.el.style.top = `${n.y}px`; }
});
renderWires();
}
function clearSelection() {
selectedWireId = null; selectedNodeId = null;
document.querySelectorAll('.lg-node.selected').forEach(el => el.classList.remove('selected'));
renderWires();
}
/* --- Logic Evaluation --- */
function evaluateGraph(overrideInputs = null) {
let context = {};
Object.values(nodes).filter(n => n.type === 'INPUT').forEach(n => {
context[n.id] = overrideInputs ? overrideInputs[n.id] : n.value;
});
let changed = true; let loops = 0;
while (changed && loops < 10) {
changed = false; loops++;
Object.values(nodes).filter(n => n.type === 'GATE').forEach(gate => {
let in1Conn = connections.find(c => c.toNode === gate.id && c.toPort === '1');
let in2Conn = connections.find(c => c.toNode === gate.id && c.toPort === '2');
let val1 = in1Conn ? (context[in1Conn.fromNode] || false) : false;
let val2 = in2Conn ? (context[in2Conn.fromNode] || false) : false;
let res = false;
switch(gate.gateType) {
case 'AND': res = val1 && val2; break;
case 'OR': res = val1 || val2; break;
case 'NOT': res = !val1; break;
case 'NAND': res = !(val1 && val2); break;
case 'NOR': res = !(val1 || val2); break;
case 'XOR': res = val1 !== val2; break;
case 'XNOR': res = val1 === val2; break;
}
if (context[gate.id] !== res) { context[gate.id] = res; changed = true; }
});
}
let outStates = {};
Object.values(nodes).filter(n => n.type === 'OUTPUT').forEach(out => {
let conn = connections.find(c => c.toNode === out.id);
let res = conn ? (context[conn.fromNode] || false) : false;
outStates[out.id] = res;
});
if (!overrideInputs) {
Object.values(nodes).forEach(n => {
if (n.type === 'GATE') n.value = context[n.id] || false;
if (n.type === 'OUTPUT') {
n.value = outStates[n.id] || false;
const bulb = n.el.querySelector('.bulb');
if (bulb) bulb.classList.toggle('on', n.value);
}
});
}
return outStates;
}
/* --- Truth Table Generation --- */
function generateTruthTable() {
// 1. Find the target container
let container = document.getElementById("truthTableContainer");
// Fail-safe: Find the card if the specific ID is missing
if (!container) {
const cards = document.querySelectorAll('.card');
const ttCard = Array.from(cards).find(c => c.innerText.includes('LIVE TRUTH TABLE'));
if (ttCard) {
container = ttCard.querySelector('.cardBodyInner') || ttCard;
}
}
if (!container) return;
// 2. Identify and sort Inputs and Outputs
const inNodes = Object.values(nodes)
.filter(n => n.type === 'INPUT')
.sort((a,b) => a.label.localeCompare(b.label));
const outNodes = Object.values(nodes)
.filter(n => n.type === 'OUTPUT')
.sort((a,b) => a.label.localeCompare(b.label));
// 3. Handle Empty State
if (inNodes.length === 0 || outNodes.length === 0) {
container.innerHTML = '<div style="padding: 20px; color: var(--muted); text-align:center; font-family: var(--bit-font); font-size: 12px; letter-spacing: 1px;">CONNECT INPUTS & OUTPUTS</div>';
return;
}
// 4. Build Table within the styled wrapper
let html = '<div class="tt-table-wrap"><table class="tt-table"><thead><tr>';
// Headers
inNodes.forEach(n => html += `<th>${n.label}</th>`);
outNodes.forEach(n => html += `<th style="color:var(--text); border-left: 1px solid rgba(255,255,255,0.1);">${n.label}</th>`);
html += '</tr></thead><tbody>';
// 5. Generate Rows
const numRows = Math.pow(2, inNodes.length);
for (let i = 0; i < numRows; i++) {
let override = {};
let stateArr = [];
// Calculate binary state for this row
inNodes.forEach((n, idx) => {
let val = ((i >> (inNodes.length - 1 - idx)) & 1) === 1;
override[n.id] = val;
stateArr.push(val ? '1' : '0');
});
let stateStr = stateArr.join('');
let isFound = discoveredStates.has(stateStr);
let outResults = evaluateGraph(override); // Simulate the board logic for this state
html += '<tr>';
// Input Cells
inNodes.forEach(n => {
let v = override[n.id];
html += `<td class="${v ? 'tt-on' : ''}">${v ? 1 : 0}</td>`;
});
// Output Cells (Discovery Logic)
outNodes.forEach(n => {
if (isFound) {
let v = outResults[n.id];
html += `<td class="${v ? 'tt-on' : ''}" style="font-weight:bold; border-left: 1px solid rgba(255,255,255,0.05);">${v ? 1 : 0}</td>`;
} else {
html += `<td style="color: #444; border-left: 1px solid rgba(255,255,255,0.05); opacity: 0.6;">?</td>`;
}
});
html += '</tr>';
}
html += '</tbody></table></div>';
container.innerHTML = html;
}
function runSimulation(topologyChanged = false) {
// If you add/remove wires, reset the table memory because the logic changed
if (topologyChanged) discoveredStates.clear();
evaluateGraph();
// Check the current board state (e.g., "10") and save it to memory
const inNodes = Object.values(nodes).filter(n => n.type === 'INPUT').sort((a,b) => a.label.localeCompare(b.label));
if (inNodes.length > 0) {
let currentStateStr = inNodes.map(n => n.value ? '1' : '0').join('');
discoveredStates.add(currentStateStr);
}
renderWires();
generateTruthTable();
}
/* --- Smart Label Generation --- */
function getNextInputLabel() {
let charCode = 65;
while (Object.values(nodes).some(n => n.type === 'INPUT' && n.label === String.fromCharCode(charCode))) { charCode++; }
return String.fromCharCode(charCode);
}
function getNextOutputLabel() {
let idx = 1;
while (Object.values(nodes).some(n => n.type === 'OUTPUT' && n.label === ('Q' + idx))) { idx++; }
return 'Q' + idx;
}
/* --- Node Creation --- */
function createNodeElement(node) {
const el = document.createElement('div');
el.className = `lg-node`; el.dataset.id = node.id;
el.style.left = `${node.x}px`; el.style.top = `${node.y}px`;
let innerHTML = `<div class="lg-header">${node.label}</div><div class="lg-gate-container">`;
if (node.type === 'INPUT') {
innerHTML += `
<div class="switch" style="margin:0;"><span class="slider"></span></div>
${INPUT_SVG}
<div class="lg-port" data-port="out" style="top: 25px; left: 86px;"></div>
`;
}
else if (node.type === 'OUTPUT') {
innerHTML += `
<div class="lg-port" data-port="in1" style="top: 25px; left: 0;"></div>
${OUTPUT_SVG}
<div class="bulb" style="margin:0;"><svg viewBox="0 0 24 24" fill="currentColor"><path d="M12 2.25a6.75 6.75 0 0 0-6.75 6.75c0 2.537 1.393 4.75 3.493 5.922l.507.282v1.546h5.5v-1.546l.507-.282A6.75 6.75 0 0 0 12 2.25Zm-2.25 16.5v.75a2.25 2.25 0 0 0 4.5 0v-.75h-4.5Z"/></svg></div>
`;
}
else if (node.type === 'GATE') {
const isNot = node.gateType === 'NOT';
innerHTML += `
<div class="lg-port" data-port="in1" style="top: ${isNot ? '25px' : '15px'}; left: 0;"></div>
${!isNot ? `<div class="lg-port" data-port="in2" style="top: 35px; left: 0;"></div>` : ''}
<svg class="lg-gate-svg" viewBox="0 0 100 50">${GATE_SVGS[node.gateType]}</svg>
<div class="lg-port" data-port="out" style="top: 25px; left: 100px;"></div>
`;
}
innerHTML += `</div>`;
el.innerHTML = innerHTML;
viewport.appendChild(el);
node.el = el;
if (node.type === 'INPUT') {
const sw = el.querySelector('.switch');
sw.addEventListener('click', (e) => {
// ... (keep your clickStartX/Y drag check) ...
node.value = !node.value;
// This targets the exact class your CSS needs for the glow and move
sw.classList.toggle('active-sim', node.value);
// This ensures the table and logic update
runSimulation();
});
}
return el;
}
function spawnNode(type, gateType = null, dropX = null, dropY = null) {
let label = '';
if (type === 'INPUT') label = getNextInputLabel();
if (type === 'OUTPUT') label = getNextOutputLabel();
if (type === 'GATE') label = gateType;
// Double check this line in logicGates.js
const id = `node_${Date.now()}_${nextNodeId++}`;
const offset = Math.floor(Math.random() * 40);
const x = dropX !== null ? dropX : (type === 'INPUT' ? 50 : (type === 'OUTPUT' ? 600 : 300) + offset);
const y = dropY !== null ? dropY : 150 + offset;
const node = { id, type, gateType, label, x, y, value: false, el: null };
nodes[id] = node;
createNodeElement(node);
// Change the very last line to:
runSimulation(true);
}
/* --- Global Interaction Handlers --- */
// Camera Zoom Controls
document.getElementById("btnZoomIn")?.addEventListener('click', () => {
const r = workspace.getBoundingClientRect(); zoomWorkspace(1.2, r.width/2, r.height/2);
});
document.getElementById("btnZoomOut")?.addEventListener('click', () => {
const r = workspace.getBoundingClientRect(); zoomWorkspace(1/1.2, r.width/2, r.height/2);
});
document.getElementById("btnZoomReset")?.addEventListener('click', () => {
panX = 0; panY = 0; zoom = 1; updateViewport();
});
workspace.addEventListener('wheel', (e) => {
e.preventDefault();
const wsRect = workspace.getBoundingClientRect();
const factor = e.deltaY < 0 ? 1.1 : (1/1.1);
zoomWorkspace(factor, e.clientX - wsRect.left, e.clientY - wsRect.top);
});
workspace.addEventListener('mousedown', (e) => {
clickStartX = e.clientX; clickStartY = e.clientY;
const port = e.target.closest('.lg-port');
if (port) {
const nodeEl = port.closest('.lg-node');
const portId = port.dataset.port;
if (portId.startsWith('in')) {
const existingIdx = connections.findIndex(c => c.toNode === nodeEl.dataset.id && c.toPort === portId.replace('in', ''));
if (existingIdx !== -1) { connections.splice(existingIdx, 1); runSimulation(); return; }
}
if (portId === 'out') {
const coords = getPortCoords(nodeEl.dataset.id, 'out');
wiringStart = { node: nodeEl.dataset.id, port: portId, x: coords.x, y: coords.y };
tempWirePath = { x: coords.x, y: coords.y };
return;
}
}
const wire = e.target.closest('.lg-wire');
if (wire && wire.dataset.connId) {
clearSelection();
selectedWireId = wire.dataset.connId;
renderWires();
e.stopPropagation();
return;
}
const nodeEl = e.target.closest('.lg-node');
if (nodeEl) {
clearSelection();
selectedNodeId = nodeEl.dataset.id;
nodeEl.classList.add('selected');
isDraggingNode = nodeEl.dataset.id;
const rect = nodeEl.getBoundingClientRect();
dragOffset = { x: (e.clientX - rect.left) / zoom, y: (e.clientY - rect.top) / zoom };
return;
}
// Clicked empty space -> Pan Camera
clearSelection();
isPanning = true;
panStart = { x: e.clientX - panX, y: e.clientY - panY };
});
window.addEventListener('mousemove', (e) => {
const wsRect = workspace.getBoundingClientRect();
if (isPanning) {
panX = e.clientX - panStart.x;
panY = e.clientY - panStart.y;
updateViewport();
return;
}
if (isDraggingNode) {
const node = nodes[isDraggingNode];
let newX = (e.clientX - wsRect.left - panX) / zoom - dragOffset.x;
let newY = (e.clientY - wsRect.top - panY) / zoom - dragOffset.y;
node.x = newX; node.y = newY;
updateNodePositions();
}
if (wiringStart) {
tempWirePath = {
x: (e.clientX - wsRect.left - panX) / zoom,
y: (e.clientY - wsRect.top - panY) / zoom
};
renderWires();
}
});
window.addEventListener('mouseup', (e) => {
isDraggingNode = null;
isPanning = false;
if (wiringStart) {
const port = e.target.closest('.lg-port');
if (port && port.dataset.port.startsWith('in')) {
const targetNodeId = port.closest('.lg-node').dataset.id;
const targetPortId = port.dataset.port.replace('in', '');
if (targetNodeId !== wiringStart.node) {
connections = connections.filter(c => !(c.toNode === targetNodeId && c.toPort === targetPortId));
connections.push({ id: `conn_${nextWireId++}`, fromNode: wiringStart.node, fromPort: 'out', toNode: targetNodeId, toPort: targetPortId });
}
}
// Change the very last line of the if(wiringStart) block to:
wiringStart = null; tempWirePath = null;
runSimulation(true);
}
});
/* --- Deletion --- */
window.addEventListener('keydown', (e) => {
if (e.key === 'Delete' || e.key === 'Backspace') {
if (selectedWireId) {
connections = connections.filter(c => c.id !== selectedWireId);
clearSelection(); runSimulation();
}
else if (selectedNodeId) {
connections = connections.filter(c => c.fromNode !== selectedNodeId && c.toNode !== selectedNodeId);
if (nodes[selectedNodeId] && nodes[selectedNodeId].el) {
viewport.removeChild(nodes[selectedNodeId].el);
}
delete nodes[selectedNodeId];
// Change the two deletion triggers to:
clearSelection(); runSimulation(true);
}
}
});
/* --- Drag and Drop --- */
workspace.addEventListener('dragover', (e) => { e.preventDefault(); });
workspace.addEventListener('drop', (e) => {
e.preventDefault();
const spawnType = e.dataTransfer.getData('spawnType');
if (spawnType) {
const gateType = e.dataTransfer.getData('gateType');
const wsRect = workspace.getBoundingClientRect();
const x = (e.clientX - wsRect.left - panX) / zoom - 40;
const y = (e.clientY - wsRect.top - panY) / zoom - 30;
spawnNode(spawnType, gateType || null, x, y);
}
});
/* --- Init --- */
btnClearBoard?.addEventListener('click', () => {
viewport.querySelectorAll('.lg-node').forEach(el => el.remove());
// Target your specific SVG layer class
const svgLayer = document.querySelector('.lg-svg-layer');
if (svgLayer) svgLayer.innerHTML = '';
nodes = {};
connections = [];
discoveredStates.clear();
runSimulation(true);
});
toolboxToggle?.addEventListener("click", () => {
const isCollapsed = logicPage?.classList.contains("toolboxCollapsed");
logicPage.classList.toggle("toolboxCollapsed", !isCollapsed);
toolboxToggle?.setAttribute("aria-expanded", isCollapsed ? "true" : "false");
setTimeout(renderWires, 450);
});
initToolbox();
})();