From cc321f96d2c981efe2c77637f39bd00ab2f1d0c3 Mon Sep 17 00:00:00 2001
From: ShikiSuen <shikisuen@outlook.com>
Date: Fri, 4 Mar 2022 22:56:38 +0800
Subject: [PATCH] KeyHandlerInput // Attempt to detect flag changes.

---
 Source/Modules/ControllerModules/KeyHandlerInput.swift | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Source/Modules/ControllerModules/KeyHandlerInput.swift b/Source/Modules/ControllerModules/KeyHandlerInput.swift
index dc087714..08ac51c5 100644
--- a/Source/Modules/ControllerModules/KeyHandlerInput.swift
+++ b/Source/Modules/ControllerModules/KeyHandlerInput.swift
@@ -51,6 +51,7 @@ class KeyHandlerInput: NSObject {
     @objc private (set) var inputTextIgnoringModifiers: String?
     @objc private (set) var charCode: UInt16
     @objc private (set) var keyCode: UInt16
+    private var isFlagChanged: Bool
     private var flags: NSEvent.ModifierFlags
     private var cursorForwardKey: KeyCode
     private var cursorBackwardKey: KeyCode
@@ -68,6 +69,7 @@ class KeyHandlerInput: NSObject {
         self.keyCode = keyCode
         self.charCode = AppleKeyboardConverter.cnvApple2ABC(charCode)
         self.flags = flags
+        self.isFlagChanged = false
         useVerticalMode = isVerticalMode
         emacsKey = EmacsKeyHelper.detect(charCode: AppleKeyboardConverter.cnvApple2ABC(charCode), flags: flags)
         cursorForwardKey = useVerticalMode ? .down : .right
@@ -84,6 +86,7 @@ class KeyHandlerInput: NSObject {
         inputTextIgnoringModifiers = AppleKeyboardConverter.cnvStringApple2ABC(event.charactersIgnoringModifiers ?? "")
         keyCode = event.keyCode
         flags = event.modifierFlags
+        isFlagChanged = (event.type == .flagsChanged) ? true : false
         useVerticalMode = isVerticalMode
         let charCode: UInt16 = {
             guard let inputText = event.characters, inputText.count > 0 else {