// @effect-diagnostics nodeBuiltinImport:off -- This macOS platform boundary spawns the native modifier-key poller with Node. import * as NodeChildProcess from "node:child_process"; import type { SnapShotModifier } from "@t3tools/contracts"; const MAC_MODIFIER_PAIR_DEVICE_MASKS: Record<SnapShotModifier, readonly [number, number]> = { shift: [0x2, 0x4], control: [0x1, 0x2000], alt: [0x20, 0x40], meta: [0x8, 0x10],}; const POLLER_SCRIPT = `ObjC.import("CoreGraphics");ObjC.import("unistd");function run(argv) { const left = Number(argv[0]); const right = Number(argv[1]); const both = left | right; let active = false; console.log("ready"); while ($.getppid() !== 1) { const pressed = ($.CGEventSourceFlagsState(0) & both) === both; if (pressed && !active) console.log("trigger"); active = pressed; delay(0.05); } return "orphaned";}`; export function startMacModifierPairShortcutProcess( modifier: SnapShotModifier, onTrigger: () => void, onFailure: (error: Error) => void,): Promise<() => void> { const [left, right] = MAC_MODIFIER_PAIR_DEVICE_MASKS[modifier]; const poller = NodeChildProcess.spawn( "/usr/bin/osascript", ["-l", "JavaScript", "-e", POLLER_SCRIPT, String(left), String(right)], { stdio: ["ignore", "ignore", "pipe"] }, ); return new Promise((resolve, reject) => { let settled = false; let stopped = false; let buffered = ""; const stop = () => { if (stopped) return; stopped = true; poller.kill(); }; const fail = (error: Error) => { if (stopped) return; if (settled) { stop(); onFailure(error); return; } settled = true; stop(); reject(error); }; poller.stderr.on("data", (chunk: Buffer) => { buffered += chunk.toString(); const lines = buffered.split("\n"); buffered = lines.pop() ?? ""; for (const line of lines) { const message = line.trim(); if (message === "ready" && !settled) { settled = true; resolve(stop); continue; } if (message !== "trigger" || !settled || stopped) continue; try { onTrigger(); } catch {} } }); poller.once("error", (error) => { fail(error); }); poller.once("exit", (code) => { fail(new Error(`Snapshot shortcut helper exited with code ${code}`)); }); });}
// @effect-diagnostics nodeBuiltinImport:off -- This macOS platform boundary spawns the native modifier-key poller with Node.
import * as NodeChildProcess from "node:child_process";
import type { SnapShotModifier } from "@t3tools/contracts";
const MAC_MODIFIER_PAIR_DEVICE_MASKS: Record<SnapShotModifier, readonly [number, number]> = {
shift: [0x2, 0x4],
control: [0x1, 0x2000],
alt: [0x20, 0x40],
meta: [0x8, 0x10],
};
const POLLER_SCRIPT = `
ObjC.import("CoreGraphics");
ObjC.import("unistd");
function run(argv) {
const left = Number(argv[0]);
const right = Number(argv[1]);
const both = left | right;
let active = false;
console.log("ready");
while ($.getppid() !== 1) {
const pressed = ($.CGEventSourceFlagsState(0) & both) === both;
if (pressed && !active) console.log("trigger");
active = pressed;
delay(0.05);
}
return "orphaned";
}`;
export function startMacModifierPairShortcutProcess(
modifier: SnapShotModifier,
onTrigger: () => void,
onFailure: (error: Error) => void,
): Promise<() => void> {
const [left, right] = MAC_MODIFIER_PAIR_DEVICE_MASKS[modifier];
const poller = NodeChildProcess.spawn(
"/usr/bin/osascript",
["-l", "JavaScript", "-e", POLLER_SCRIPT, String(left), String(right)],
{ stdio: ["ignore", "ignore", "pipe"] },
);
return new Promise((resolve, reject) => {
let settled = false;
let stopped = false;
let buffered = "";
const stop = () => {
if (stopped) return;
stopped = true;
poller.kill();
};
const fail = (error: Error) => {
if (stopped) return;
if (settled) {
stop();
onFailure(error);
return;
}
settled = true;
stop();
reject(error);
};
poller.stderr.on("data", (chunk: Buffer) => {
buffered += chunk.toString();
const lines = buffered.split("\n");
buffered = lines.pop() ?? "";
for (const line of lines) {
const message = line.trim();
if (message === "ready" && !settled) {
settled = true;
resolve(stop);
continue;
}
if (message !== "trigger" || !settled || stopped) continue;
try {
onTrigger();
} catch {}
}
});
poller.once("error", (error) => {
fail(error);
});
poller.once("exit", (code) => {
fail(new Error(`Snapshot shortcut helper exited with code ${code}`));
});
});
}