增加“关闭时最小化到托盘”的设置 (#166)

添加托盘设置，调整主进程代码架构

src/main/modules/tray.js

@@ -0,0 +1,42 @@
+const { Tray, Menu } = require('electron')
+const { isMac, isWin } = require('../../common/utils')
+const { tray: TRAY_EVENT_NAME } = require('../events/_name')
+const path = require('path')
+global.lx_event.tray.on(TRAY_EVENT_NAME.create, () => {
+  createTray()
+})
+global.lx_event.tray.on(TRAY_EVENT_NAME.destroy, () => {
+  destroyTray()
+})
+
+let tray
+function createTray() {
+  if (tray && !tray.isDestroyed() && global.appSetting.tray && global.appSetting.tray.isShow) return
+
+  const iconPath = path.join(global.__static, 'images/tray', isWin ? '256x256.ico' : isMac ? '512x512.icns' : '512x512.png')
+
+  // 托盘
+  tray = new Tray(iconPath)
+
+  const contextMenu = Menu.buildFromTemplate([
+    {
+      label: '退出',
+      role: 'quit',
+    },
+  ])
+  tray.setToolTip('洛雪音乐助手')
+  tray.setContextMenu(contextMenu)
+  tray.on('click', () => {
+    const mainWindow = global.mainWindow
+    if (!mainWindow) return
+    mainWindow.isVisible()
+      ? mainWindow.focus()
+      : mainWindow.show()
+  })
+}
+
+function destroyTray() {
+  if (!tray) return
+  tray.destroy()
+  tray = null
+}