v3.1.0 - 在有任务正在下载时阻止系统休眠，但允许屏幕关闭 - #34

app/package.json

@@ -1,6 +1,6 @@
 {
     "name": "aria-ng-gui",
-    "version": "3.0.0",
+    "version": "3.1.0",
     "private": true,
     "description": "AriaNg GUI",
     "main": "app.js",

app/plugins/index.js

@@ -20,6 +20,7 @@ const plugins = [
     require("./save-local-config"),
     require("./notification"),
     require("./trackers"),
+    require("./power-save-blocker"),
 ]
 
 module.exports = plugins

app/plugins/power-save-blocker.js

@@ -0,0 +1,62 @@
+/*!
+ * AriaNg GUI
+ * 
+ * Copyright (c) 2018-2020 Xmader
+ * Released under the MIT license
+ * 
+ * Source Code: https://github.com/Xmader/aria-ng-gui
+ * 
+ * power-save-blocker.js - 在有任务正在下载时阻止系统休眠，但允许屏幕关闭
+ * https://github.com/Xmader/aria-ng-gui/issues/34
+ */
+
+// @ts-check
+
+const { powerSaveBlocker } = require("electron").remote
+
+class PowerSaveBlocker {
+
+    /** @type {number} */
+    id = null
+
+    start() {
+        if (this.id !== null) {
+            return
+        }
+
+        // 阻止系统休眠，但允许屏幕关闭
+        this.id = powerSaveBlocker.start("prevent-app-suspension")
+
+        console.log("powerSaveBlocker started")
+    }
+
+    stop() {
+        if (this.id !== null && powerSaveBlocker.isStarted(this.id)) {
+            powerSaveBlocker.stop(this.id)
+            this.id = null
+            console.log("powerSaveBlocker stopped")
+        }
+    }
+
+}
+
+const blocker = new PowerSaveBlocker()
+
+/**
+ * @typedef {import("./index").Plugin} Plugin
+ * @type {Plugin}
+ */
+module.exports = {
+    activate(context) {
+
+        context.addListener("downloading", (tasks) => {
+            const isDownloading = tasks.length > 0
+            if (isDownloading) {
+                blocker.start()
+            } else {
+                blocker.stop()
+            }
+        })
+
+    }
+}