Add feature to hide window into system tray in Linux

src/browser/settings.jsx

@@ -27,16 +27,17 @@ function backToIndex() {
 
 var SettingsPage = React.createClass({
   getInitialState: function() {
-    var config;
+    var initialState;
     try {
-      config = settings.readFileSync(this.props.configFile);
+      initialState = settings.readFileSync(this.props.configFile);
     } catch (e) {
-      config = settings.loadDefault();
+      initialState = settings.loadDefault();
     }
 
-    config.showAddTeamForm = false;
+    initialState.showAddTeamForm = false;
+    initialState.trayWasVisible = remote.getCurrentWindow().trayWasVisible;
 
-    return config;
+    return initialState;
   },
   componentDidMount: function() {
     if (process.platform === 'win32' || process.platform === 'linux') {
@@ -47,13 +48,6 @@ var SettingsPage = React.createClass({
         });
       });
     }
-
-    if (process.platform === 'darwin') {
-      var currentWindow = remote.getCurrentWindow();
-      this.setState({
-        trayWasVisible: currentWindow.trayWasVisible
-      });
-    }
   },
   handleTeamsChange: function(teams) {
     this.setState({
@@ -188,7 +182,7 @@ var SettingsPage = React.createClass({
                    />);
     }
 
-    if (process.platform === 'darwin') {
+    if (process.platform === 'darwin' || process.platform === 'linux') {
       options.push(<Input key="inputMinimizeToTray" id="inputMinimizeToTray" ref="minimizeToTray" type="checkbox" label={ this.state.trayWasVisible || !this.state.showTrayIcon ? "Leave app running in notification area when the window is closed" : "Leave app running in notification area when the window is closed (available on next restart)" } disabled={ !this.state.showTrayIcon || !this.state.trayWasVisible } checked={ this.state.minimizeToTray }
                      onChange={ this.handleChangeMinimizeToTray } />);
     }

src/main.js

@@ -232,7 +232,7 @@ app.on('ready', function() {
 
     trayIcon.setToolTip(app.getName());
     trayIcon.on('click', function() {
-      if (process.platform === 'win32') {
+      if (process.platform === 'win32' || process.platform === 'linux') {
         if (mainWindow.isHidden || mainWindow.isMinimized()) {
           mainWindow.show();
           mainWindow.isHidden = false;
@@ -407,7 +407,13 @@ app.on('ready', function() {
           mainWindow.isHidden = true;
           break;
         case 'linux':
-          mainWindow.minimize();
+          if (config.minimizeToTray) {
+            mainWindow.hide();
+            mainWindow.isHidden = true;
+          }
+          else {
+            mainWindow.minimize();
+          }
           break;
         case 'darwin':
           mainWindow.hide();

test/specs/browser/settings_test.js

@@ -152,8 +152,8 @@ describe('browser/settings.html', function() {
     });
 
     describe('Minimize to tray', function() {
-      it('should appear on darwin', function() {
-        const expected = (process.platform === 'darwin');
+      it('should appear on darwin or linux', function() {
+        const expected = (process.platform === 'darwin' || process.platform === 'linux');
         env.addClientCommands(this.app.client);
         return this.app.client
           .loadSettingsPage()