Electron: Fixes #562: Disable power saving when syncing in Linux

ElectronClient/app/app.js

@@ -48,6 +48,7 @@ class Application extends BaseApplication {
 	constructor() {
 		super();
 		this.lastMenuScreen_ = null;
+		this.powerSaveBlockerId_ = null;
 	}
 
 	hasGui() {
@@ -190,6 +191,17 @@ class Application extends BaseApplication {
 			Setting.setValue('sidebarVisibility', newState.sidebarVisibility);
 		}
 
+		if (action.type === 'SYNC_STARTED') {
+			if (!this.powerSaveBlockerId_) this.powerSaveBlockerId_ = bridge().powerSaveBlockerStart('prevent-app-suspension');
+		}
+
+		if (action.type === 'SYNC_COMPLETED') {
+			if (this.powerSaveBlockerId_) {
+				bridge().powerSaveBlockerStop(this.powerSaveBlockerId_);
+				this.powerSaveBlockerId_ = null;
+			}
+		}
+
 		return result;
 	}
 
@@ -655,6 +667,8 @@ class Application extends BaseApplication {
 			ids: Setting.value('collapsedFolderIds'),
 		});
 
+		if (shim.isLinux()) bridge().setAllowPowerSaveBlockerToggle(true);
+
 		// Note: Auto-update currently doesn't work in Linux: it downloads the update
 		// but then doesn't install it on exit.
 		if (shim.isWindows() || shim.isMac()) {

ElectronClient/app/bridge.js

@@ -1,6 +1,7 @@
 const { _, setLocale } = require('lib/locale.js');
 const { dirname } = require('lib/path-utils.js');
 const { Logger } = require('lib/logger.js');
+const { powerSaveBlocker } = require('electron');
 
 class Bridge {
 
@@ -8,6 +9,7 @@ class Bridge {
 		this.electronWrapper_ = electronWrapper;
 		this.autoUpdateLogger_ = null;
 		this.lastSelectedPath_ = null;
+		this.allowPowerSaveBlockerToggle_ = false;
 	}
 
 	electronApp() {
@@ -22,6 +24,10 @@ class Bridge {
 		return this.electronWrapper_.window();
 	}
 
+	setAllowPowerSaveBlockerToggle(v) {
+		this.allowPowerSaveBlockerToggle_ = v;
+	}
+
 	windowContentSize() {
 		if (!this.window()) return { width: 0, height: 0 };
 		const s = this.window().getContentSize();
@@ -120,6 +126,18 @@ class Bridge {
 		checkForUpdates(inBackground, window, logFilePath);
 	}
 
+	powerSaveBlockerStart(type) {
+		if (!this.allowPowerSaveBlockerToggle_) return null;
+		console.info('Enable powerSaveBlockerStart: ' + type);
+		return powerSaveBlocker.start(type);
+	}
+
+	powerSaveBlockerStop(id) {
+		if (!this.allowPowerSaveBlockerToggle_) return null;
+		console.info('Disable powerSaveBlocker: ' + id);
+		return powerSaveBlocker.stop(id);
+	}
+
 }
 
 let bridge_ = null;