new function to switchToActive tab

src/app/files/fileManager.js

@@ -102,9 +102,7 @@ class FileManager extends Plugin {
 
   closeFile (name) {
     delete this.openedFiles[name]
-    if (Object.keys(this.openedFiles).length) {
-      this.switchFile(Object.keys(this.openedFiles)[0])
-    } else {
+    if (!Object.keys(this.openedFiles).length) {
       this.editor.displayEmptyReadOnlySession()
       this._deps.config.set('currentFile', '')
       this.events.emit('noFileSelected')

src/app/panels/tab-proxy.js

@@ -20,7 +20,6 @@ export class TabProxy {
 
     fileManager.events.on('fileClosed', (name) => {
       this.removeTab(name)
-      this.switchPreviousTab()
     })
 
     fileManager.events.on('currentFileChanged', (file) => {
@@ -105,11 +104,19 @@ export class TabProxy {
       const handlers = Object.keys(this._handlers)
       let i = handlers.indexOf(active)
       if (i >= 0) {
+        i = handlers[i - 1] ? i - 1 : handlers.length - 1
         this.switchTab(handlers[i])
       }
     }
   }
 
+  switchToActiveTab () {
+    const active = this._view.filetabs.active
+    if (active && this._handlers[active]) {
+      this.switchTab(active)
+    }
+  }
+
   showTab (name) {
     this._view.filetabs.activateTab(name)
   }
@@ -133,6 +140,7 @@ export class TabProxy {
   removeTab (name) {
     this._view.filetabs.removeTab(name)
     delete this._handlers[name]
+    this.switchToActiveTab ()
   }
 
   addHandler (type, fn) {