InputMCP

import electron from 'electron'; const { app, BrowserWindow, ipcMain } = electron; import path from 'path'; import { fileURLToPath } from 'url'; import type { SubmissionResult } from '../../src/shared/types.js'; const __filename = fileURLToPath(import.meta.url); const __dirname = path.dirname(__filename); let mainWindow: BrowserWindow | null = null; type SubmitPayload = SubmissionResult; type ResponsePayload = | { action: 'submit'; result: SubmissionResult } | { action: 'cancel' } | { action: 'error'; message: string }; type WindowTextSpec = { kind: 'text'; lines: number }; type WindowImageSpec = { kind: 'image'; width: number; height: number }; type WindowPixelArtSpec = { kind: 'pixelart'; gridWidth: number; gridHeight: number; cellSize: number }; type WindowSpec = WindowTextSpec | WindowImageSpec | WindowPixelArtSpec; function parseWindowSpec(raw: string | undefined): WindowSpec { if (raw) { try { const parsed = JSON.parse(raw) as Record<string, unknown>; if (parsed.kind === 'pixelart') { const rawGridWidth = typeof parsed.gridWidth === 'number' && Number.isFinite(parsed.gridWidth) ? parsed.gridWidth : undefined; const rawGridHeight = typeof parsed.gridHeight === 'number' && Number.isFinite(parsed.gridHeight) ? parsed.gridHeight : undefined; const rawCellSize = typeof parsed.cellSize === 'number' && Number.isFinite(parsed.cellSize) ? parsed.cellSize : undefined; const gridWidth = rawGridWidth !== undefined ? Math.max(4, Math.min(128, Math.floor(rawGridWidth))) : 16; const gridHeight = rawGridHeight !== undefined ? Math.max(4, Math.min(128, Math.floor(rawGridHeight))) : 16; const cellSize = rawCellSize !== undefined ? Math.max(4, Math.min(64, Math.floor(rawCellSize))) : 20; return { kind: 'pixelart', gridWidth, gridHeight, cellSize }; } if (parsed.kind === 'image') { const rawWidth = typeof parsed.width === 'number' && Number.isFinite(parsed.width) ? parsed.width : undefined; const rawHeight = typeof parsed.height === 'number' && Number.isFinite(parsed.height) ? parsed.height : undefined; const width = rawWidth !== undefined ? Math.max(32, Math.min(4096, Math.floor(rawWidth))) : 512; const height = rawHeight !== undefined ? Math.max(32, Math.min(4096, Math.floor(rawHeight))) : 512; return { kind: 'image', width, height }; } const rawLines = typeof parsed.lines === 'number' && Number.isFinite(parsed.lines) ? parsed.lines : undefined; const lines = rawLines !== undefined ? Math.max(1, Math.min(20, Math.floor(rawLines))) : 1; return { kind: 'text', lines }; } catch (error) { console.warn('Failed to parse MCP_INPUT_SPEC for window sizing', error); } } return { kind: 'text', lines: 1 }; } const windowSpec = parseWindowSpec(process.env.MCP_INPUT_SPEC); let responded = false; function respond(payload: ResponsePayload): void { if (responded) return; responded = true; console.log(JSON.stringify(payload)); process.exit(0); } function createWindow(): void { let width: number; let height: number; if (windowSpec.kind === 'pixelart') { // Calculate window size based on pixel art grid // Account for palette (50px), padding (24px), actions (50px), status (24px) const canvasDisplaySize = Math.max(windowSpec.gridWidth, windowSpec.gridHeight) * windowSpec.cellSize; const windowSize = Math.max(480, Math.min(canvasDisplaySize + 150, 900)); width = windowSize; height = windowSize; } else if (windowSpec.kind === 'image') { width = Math.max(720, Math.min(windowSpec.width + 200, 1600)); height = Math.max(520, Math.min(windowSpec.height + 260, 1200)); } else { width = 520; height = Math.max(240, Math.min(180 + (windowSpec.lines - 1) * 60, 720)); } mainWindow = new BrowserWindow({ width, height, webPreferences: { nodeIntegration: true, contextIsolation: false }, resizable: true, alwaysOnTop: true, center: true, title: 'Input Prompt' }); // Load HTML file instead of inline HTML const htmlPath = path.join(__dirname, 'index.html'); mainWindow.loadFile(htmlPath); mainWindow.on('closed', () => { mainWindow = null; respond({ action: 'cancel' }); }); } // Handle IPC messages from renderer ipcMain.on('submit', (_event, result: SubmitPayload) => { respond({ action: 'submit', result }); }); ipcMain.on('cancel', () => { respond({ action: 'cancel' }); }); app.whenReady().then(createWindow); app.on('window-all-closed', () => { if (process.platform !== 'darwin') { app.quit(); } }); app.on('activate', () => { if (BrowserWindow.getAllWindows().length === 0) { createWindow(); } });