Handle Tab and Shift+Tab

Author: tom-ludwig

Sources/CodeEditSourceEditor/Controller/TextViewController+LoadView.swift

@@ -115,22 +115,43 @@ extension TextViewController {
         }
         self.localEvenMonitor = NSEvent.addLocalMonitorForEvents(matching: .keyDown) { [weak self] event in
             guard self?.view.window?.firstResponder == self?.textView else { return event }
-            let commandKey = NSEvent.ModifierFlags.command.rawValue
+
+            let tabKey: UInt16 = 0x30
             let modifierFlags = event.modifierFlags.intersection(.deviceIndependentFlagsMask).rawValue
 
-            switch (modifierFlags, event.charactersIgnoringModifiers) {
-            case (commandKey, "/"):
-                self?.handleCommandSlash()
-                return nil
-            case (commandKey, "["):
-                self?.handleIndent(inwards: true)
-                return nil
-            case (commandKey, "]"):
-                self?.handleIndent()
+            if event.keyCode == tabKey {
+                self?.handleTab(modifierFalgs: modifierFlags)
                 return nil
-            default:
-                return event
+            } else {
+                return self?.handleCommand(event: event, modifierFlags: modifierFlags)
             }
         }
     }
+    func handleCommand(event: NSEvent, modifierFlags: UInt) -> NSEvent? {
+        let commandKey = NSEvent.ModifierFlags.command.rawValue
+
+        switch (modifierFlags, event.charactersIgnoringModifiers) {
+        case (commandKey, "/"):
+            handleCommandSlash()
+            return nil
+        case (commandKey, "["):
+            handleIndent(inwards: true)
+            return nil
+        case (commandKey, "]"):
+            handleIndent()
+            return nil
+        case (_, _):
+            return event
+        }
+    }
+
+    func handleTab(modifierFalgs: UInt) {
+        let shiftKey = NSEvent.ModifierFlags.shift.rawValue
+
+        if modifierFalgs == shiftKey {
+            handleIndent(inwards: true)
+        } else {
+            handleIndent()
+        }
+    }
 }