feat: press in-game keys based on keyboard events

manifest.json

@@ -17,5 +17,8 @@
             "run_at": "document_idle"
         }
     ],
-    "permissions": ["storage"]
+    "background": {
+        "service_worker": "dist/background.js"
+    },
+    "permissions": ["storage", "tabs", "debugger"]
 }

package.json

@@ -3,8 +3,8 @@
     "version": "1.0.0",
     "description": "Tweaks for WoV Assassins Convention",
     "scripts": {
-        "build": "esbuild src/content.ts src/popup.ts --bundle --outdir=dist --platform=browser --target=chrome120",
-        "watch": "esbuild src/content.ts src/popup.ts --bundle --outdir=dist --platform=browser --target=chrome120 --watch",
+        "build": "esbuild src/content.ts src/popup.ts src/background.ts --bundle --outdir=dist --platform=browser --target=chrome120",
+        "watch": "esbuild src/content.ts src/popup.ts src/background.ts --bundle --outdir=dist --platform=browser --target=chrome120 --watch",
         "dev": "pnpm watch"
     },
     "devDependencies": {

src/background.ts

@@ -0,0 +1,28 @@
+type SimulateClickMessage = {
+    type: "simulate-click";
+    x: number;
+    y: number;
+};
+
+chrome.runtime.onMessage.addListener((message: SimulateClickMessage) => {
+    if (message.type !== "simulate-click") return;
+
+    const { x, y } = message;
+
+    chrome.tabs.query({ active: true, currentWindow: true }, (tabs) => {
+        if (!tabs[0]?.id) return;
+        const target = { tabId: tabs[0].id! };
+
+        chrome.debugger.attach(target, "1.2", () => {
+            if (chrome.runtime.lastError) return;
+
+            chrome.debugger.sendCommand(target, "Input.dispatchMouseEvent", { type: "mouseMoved", x, y }, () => {
+                chrome.debugger.sendCommand(target, "Input.dispatchMouseEvent", { type: "mousePressed", button: "left", x, y, clickCount: 1 }, () => {
+                    chrome.debugger.sendCommand(target, "Input.dispatchMouseEvent", { type: "mouseReleased", button: "left", x, y, clickCount: 1 }, () => {
+                        chrome.debugger.detach(target);
+                    });
+                });
+            });
+        });
+    });
+});

src/content.ts

@@ -1,14 +1,13 @@
 import { State, STORAGE_KEY } from "./types";
 
-const KEY_BINDINGS: Record<string, string> = {
-    // TODO
-};
-
 let enabled = false;
 
-const clickButton = (selector: string): void => {
-    const el = document.querySelector<HTMLElement>(selector);
-    el?.click();
+const findButtonForKey = (key: string): HTMLElement | null => {
+    if (key.length !== 1 || !/[a-zA-Z]/.test(key)) return null;
+    const letter = key.toUpperCase();
+    const label = Array.from(document.querySelectorAll<HTMLElement>("div[dir=\"auto\"]"))
+        .find(el => el.textContent === letter);
+    return label?.closest<HTMLElement>("[tabindex=\"0\"]") ?? null;
 };
 
 const onKeyDown = (event: KeyboardEvent): void => {
@@ -21,10 +20,15 @@ const onKeyDown = (event: KeyboardEvent): void => {
         target.isContentEditable
     ) return;
 
-    const selector = KEY_BINDINGS[event.code];
-    if (selector) {
+    const btn = findButtonForKey(event.key);
+    if (btn) {
         event.preventDefault();
-        clickButton(selector);
+        const rect = btn.getBoundingClientRect();
+        chrome.runtime.sendMessage({
+            type: "simulate-click",
+            x: rect.left + rect.width / 2,
+            y: rect.top + rect.height / 2,
+        });
     }
 };
 
@@ -33,7 +37,7 @@ const init = async (): Promise<void> => {
     const state = result[STORAGE_KEY] as State | undefined;
     enabled = state?.enabled ?? true;
 
-    document.addEventListener("keydown", onKeyDown);
+    document.addEventListener("keydown", onKeyDown, { capture: true });
 
     chrome.storage.onChanged.addListener((changes) => {
         if (STORAGE_KEY in changes) {