Merge pull request #1175 from wordpress-mobile/issue/refactor-public-independent-key-commands

Refactor TextView key commands.

Author: etoledom

Aztec/Classes/TextKit/TextView.swift

@@ -486,15 +486,27 @@ open class TextView: UITextView {
 
     // MARK: - Intercept Keystrokes
 
+    public lazy var carriageReturnKeyCommand: UIKeyCommand = {
+        return UIKeyCommand(input: String(.carriageReturn), modifierFlags: .shift, action: #selector(handleShiftEnter(command:)))
+    }()
+
+    public lazy var tabKeyCommand: UIKeyCommand = {
+        return UIKeyCommand(input: String(.tab), modifierFlags: [], action: #selector(handleTab(command:)))
+    }()
+
+    public lazy var shiftTabKeyCommand: UIKeyCommand = {
+        return  UIKeyCommand(input: String(.tab), modifierFlags: .shift, action: #selector(handleShiftTab(command:)))
+    }()
+
     override open var keyCommands: [UIKeyCommand]? {
         get {
             // When the keyboard "enter" key is pressed, the keycode corresponds to .carriageReturn,
             // even if it's later converted to .lineFeed by default.
             //
             return [
-                UIKeyCommand(input: String(.carriageReturn), modifierFlags: .shift, action: #selector(handleShiftEnter(command:))),
-                UIKeyCommand(input: String(.tab), modifierFlags: .shift, action: #selector(handleShiftTab(command:))),
-                UIKeyCommand(input: String(.tab), modifierFlags: [], action: #selector(handleTab(command:)))
+                carriageReturnKeyCommand,
+                shiftTabKeyCommand,
+                tabKeyCommand,
             ]
         }
     }