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index.js
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index.js
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import puppeteer from "puppeteer";
import keycode from "keycode";
import ffi from "ffi-napi";
import ref from "ref-napi";
import os from "os";
import import_Struct from "ref-struct-di";
import robotjs from "robotjs";
var arch = os.arch();
const Struct = import_Struct(ref);
var Input = Struct({
type: "int",
// For some reason, the wScan value is only recognized as the wScan value when we add this filler slot.
// It might be because it's expecting the values after this to be inside a "wrapper" substructure, as seen here:
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms646270(v=vs.85).aspx
"???": "int",
wVK: "short",
wScan: "short",
dwFlags: "int",
time: "int",
dwExtraInfo: "int64",
});
var user32 = ffi.Library("user32", {
SendInput: ["int", ["int", Input, "int"]],
MapVirtualKeyExA: ["uint", ["uint", "uint", "int"]],
});
const extendedKeyPrefix = 0xe000;
const INPUT_KEYBOARD = 1;
const KEYEVENTF_EXTENDEDKEY = 0x0001;
const KEYEVENTF_KEYUP = 0x0002;
const KEYEVENTF_SCANCODE = 0x0008;
export class KeyToggle_Options {
asScanCode = true;
keyCodeIsScanCode = false;
flags = null;
async = false; // async can reduce stutter in your app, if frequently sending key-events
}
let entry = new Input(); // having one persistent native object, and just changing its fields, is apparently faster (from testing)
entry.type = INPUT_KEYBOARD;
entry.time = 0;
entry.dwExtraInfo = 0;
(async () => {
// Launch the browser and open a new blank page
const browser = await puppeteer.launch({
headless: false,
});
const page = await browser.newPage();
await page.goto("https://humanbenchmark.com/tests/typing/");
await page.setViewport({ width: 1080, height: 1024 });
await page.waitForSelector("div[class='letters notranslate']");
const letters = await page.$$("span.incomplete");
let text = "";
for (let i = 0; i < letters.length; i++) {
text += await page.evaluate((el) => el.textContent, letters[i]);
}
await page.click(".letters");
robotjs.moveMouse(270, 530);
robotjs.mouseClick("left");
await Delay(1000);
const keyCodes = text.split("").map((letter) => keycode(letter));
for (let i = 0; i < keyCodes.length; i++) {
KeyTap(keyCodes[i]);
}
})();
async function Delay(ms) {
return new Promise((resolve) => setTimeout(resolve, ms));
}
export function KeyToggle(keyCode, type = "down", options) {
const opt = Object.assign({}, new KeyToggle_Options(), options);
// scan-code approach (default)
if (opt.asScanCode) {
let scanCode = opt.keyCodeIsScanCode
? keyCode
: ConvertKeyCodeToScanCode(keyCode);
let isExtendedKey = (scanCode & extendedKeyPrefix) == extendedKeyPrefix;
entry.dwFlags = KEYEVENTF_SCANCODE;
if (isExtendedKey) {
entry.dwFlags |= KEYEVENTF_EXTENDEDKEY;
}
entry.wVK = 0;
entry.wScan = isExtendedKey ? scanCode - extendedKeyPrefix : scanCode;
}
// (virtual) key-code approach
else {
entry.dwFlags = 0;
entry.wVK = keyCode;
//info.wScan = 0x0200;
entry.wScan = 0;
}
if (opt.flags != null) {
entry.dwFlags = opt.flags;
}
if (type == "up") {
entry.dwFlags |= KEYEVENTF_KEYUP;
}
if (opt.async) {
return new Promise((resolve, reject) => {
user32.SendInput.async(
1,
entry,
arch === "x64" ? 40 : 28,
(error, result) => {
if (error) reject(error);
resolve(result);
}
);
});
}
return user32.SendInput(1, entry, arch === "x64" ? 40 : 28);
}
export function KeyTap(keyCode, opt) {
KeyToggle(keyCode, "down", opt);
KeyToggle(keyCode, "up", opt);
}
export function ConvertKeyCodeToScanCode(keyCode) {
//return user32.MapVirtualKeyExA(keyCode, MAPVK_VK_TO_VSC, 0);
return user32.MapVirtualKeyExA(keyCode, 0, 0);
}