feat: disable high power consumption without charger (#14281)

Co-authored-by: DarkSky <darksky2048@gmail.com>

packages/frontend/apps/electron/src/main/events.ts

@@ -1,4 +1,4 @@
-import { ipcMain, webContents } from 'electron';
+import { ipcMain, powerMonitor, webContents } from 'electron';
 
 import {
   AFFINE_EVENT_CHANNEL_NAME,
@@ -7,6 +7,7 @@ import {
 import { applicationMenuEvents } from './application-menu';
 import { beforeAppQuit } from './cleanup';
 import { logger } from './logger';
+import { powerEvents } from './power';
 import { recordingEvents } from './recording';
 import { sharedStorageEvents } from './shared-storage';
 import { uiEvents } from './ui/events';
@@ -20,6 +21,7 @@ export const allEvents = {
   sharedStorage: sharedStorageEvents,
   recording: recordingEvents,
   popup: popupEvents,
+  power: powerEvents,
 };
 
 const subscriptions = new Map<number, Set<string>>();
@@ -71,6 +73,13 @@ export function registerEvents() {
     if (typeof channel !== 'string') return;
     if (action === 'subscribe') {
       addSubscription(event.sender, channel);
+      if (channel === 'power:power-source') {
+        event.sender.send(
+          AFFINE_EVENT_CHANNEL_NAME,
+          channel,
+          powerMonitor.isOnBatteryPower()
+        );
+      }
     } else {
       removeSubscription(event.sender, channel);
     }

packages/frontend/apps/electron/src/main/power/index.ts

@@ -0,0 +1,29 @@
+import { powerMonitor } from 'electron';
+
+/**
+ * Power-related event handlers for the Electron main process.
+ */
+export const powerEvents = {
+  /**
+   * Subscribes to system power source changes.
+   * Emits the initial state immediately upon subscription.
+   * @param emit - Callback function to send power state to the renderer.
+   * @returns A cleanup function to remove listeners from powerMonitor.
+   */
+  'power-source': (emit: (isOnBattery: boolean) => void) => {
+    // emit initial state
+    emit(powerMonitor.isOnBatteryPower());
+
+    const onBattery = () => emit(true);
+    const onAC = () => emit(false);
+
+    powerMonitor.on('on-battery', onBattery);
+    powerMonitor.on('on-ac', onAC);
+
+    // cleanup
+    return () => {
+      powerMonitor.off('on-battery', onBattery);
+      powerMonitor.off('on-ac', onAC);
+    };
+  },
+};