Repo // +ShiftKeyUpChecker.

AUTHORS

@@ -6,6 +6,7 @@ $ Main contributors and volunteers of this repository (vChewing for macOS):
 
 $ 3rd-Party Modules Used:
 
+- ShiftKeyUpChecker: (c) 2019 and onwards Qwertyyb (March Yang) (MIT License).
 - LineReader: (c) 2019 and onwards Robert Muckle-Jones (Apache 2.0 License).
 - SwiftUI Preferences UI Framework: (c) 2018 and onwards Sindre Sorhus (MIT License).
 - SwiftUI VDKComboBox: (c) 2022 and onwards Bryan Jones (CC BY-SA 4.0)

LICENSE-CHS.txt

@@ -16,6 +16,7 @@ vChewing macOS: MIT-NTL License 麻理（去商标）授权合约
 
 $ 在本专案内用到了下述第三方模组:
 
+- ShiftKeyUpChecker: (c) 2019 and onwards Qwertyyb (March Yang) (MIT License).
 - LineReader: (c) 2019 and onwards Robert Muckle-Jones (Apache 2.0 License).
 - SwiftUI Preferences UI Framework: (c) 2018 and onwards Sindre Sorhus (MIT License).
 - SwiftUI VDKComboBox: (c) 2022 and onwards Bryan Jones (CC BY-SA 4.0)

LICENSE-CHT.txt

@@ -16,6 +16,7 @@ vChewing macOS: MIT-NTL License 麻理（去商標）授權合約
 
 $ 在該專案內用到了下述第三方:
 
+- ShiftKeyUpChecker: (c) 2019 and onwards Qwertyyb (March Yang) (MIT License).
 - LineReader: (c) 2019 and onwards Robert Muckle-Jones (Apache 2.0 License).
 - SwiftUI Preferences UI Framework: (c) 2018 and onwards Sindre Sorhus (MIT License).
 - SwiftUI VDKComboBox: (c) 2022 and onwards Bryan Jones (CC BY-SA 4.0)

LICENSE-JPN.txt

@@ -16,6 +16,7 @@ macOS 版威注音の開発：Shiki Suen, Isaac Xen, Hiraku Wang, など。
 
 $ 他の用いたモジュール:
 
+- ShiftKeyUpChecker: (c) 2019 and onwards Qwertyyb (March Yang) (MIT License).
 - LineReader: (c) 2019 and onwards Robert Muckle-Jones (Apache 2.0 License).
 - SwiftUI Preferences UI Framework: (c) 2018 and onwards Sindre Sorhus (MIT License).
 - SwiftUI VDKComboBox: (c) 2022 and onwards Bryan Jones (CC BY-SA 4.0)

LICENSE.txt

@@ -16,6 +16,7 @@ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLI
 
 $ 3rd-Party Modules Used:
 
+- ShiftKeyUpChecker: (c) 2019 and onwards Qwertyyb (March Yang) (MIT License).
 - LineReader: (c) 2019 and onwards Robert Muckle-Jones (Apache 2.0 License).
 - SwiftUI Preferences UI Framework: (c) 2018 and onwards Sindre Sorhus (MIT License).
 - SwiftUI VDKComboBox: (c) 2022 and onwards Bryan Jones (CC BY-SA 4.0)

Source/3rdParty/Qwertyyb/ShiftKeyUpChecker.swift

@@ -0,0 +1,57 @@
+// (c) 2022 and onwards Qwertyyb (MIT License).
+// ====================
+// This code is released under the MIT license (SPDX-License-Identifier: MIT)
+
+import Carbon
+import Cocoa
+import Foundation
+
+extension Date {
+  static func - (lhs: Date, rhs: Date) -> TimeInterval {
+    lhs.timeIntervalSinceReferenceDate - rhs.timeIntervalSinceReferenceDate
+  }
+}
+
+class ShiftKeyUpChecker {
+  init() {}
+  private static var checkModifier: NSEvent.ModifierFlags { NSEvent.ModifierFlags.shift }
+  private static var checkKeyCode: [UInt16] { [KeyCode.kShift.rawValue, KeyCode.kRightShift.rawValue] }
+
+  private static let delayInterval = 0.3
+
+  private static var lastTime: Date = .init()
+
+  private static func checkModifierKeyUp(event: NSEvent) -> Bool {
+    if event.type == .flagsChanged,
+      event.modifierFlags.intersection(.deviceIndependentFlagsMask) == .init(rawValue: 0),
+      Date() - lastTime <= delayInterval
+    {
+      // modifier keyup event
+      lastTime = Date(timeInterval: -3600 * 4, since: Date())
+      return true
+    }
+    return false
+  }
+
+  private static func checkModifierKeyDown(event: NSEvent) -> Bool {
+    let isLeftShift = event.modifierFlags.rawValue & UInt(NX_DEVICELSHIFTKEYMASK) != 0
+    let isRightShift = event.modifierFlags.rawValue & UInt(NX_DEVICERSHIFTKEYMASK) != 0
+    print("isLeftShift: \(isLeftShift), isRightShift: \(isRightShift)")
+    let isKeyDown =
+      event.type == .flagsChanged
+      && event.modifierFlags.intersection(.deviceIndependentFlagsMask) == checkModifier
+      && ShiftKeyUpChecker.checkKeyCode.contains(event.keyCode)
+    if isKeyDown {
+      // modifier keydown event
+      lastTime = Date()
+    } else {
+      lastTime = Date(timeInterval: -3600 * 4, since: Date())
+    }
+    return false
+  }
+
+  // To confirm that the shift key is "pressed-and-released".
+  public static func check(_ event: NSEvent) -> Bool {
+    ShiftKeyUpChecker.checkModifierKeyUp(event: event) || ShiftKeyUpChecker.checkModifierKeyDown(event: event)
+  }
+}

vChewing.xcodeproj/project.pbxproj

@@ -49,6 +49,7 @@
 		5B949BD92816DC5400D87B5D /* LineReader.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5B949BD82816DC5400D87B5D /* LineReader.swift */; };
 		5B949BDB2816DDBC00D87B5D /* LMConsolidator.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5B949BDA2816DDBC00D87B5D /* LMConsolidator.swift */; };
 		5BA0DF312817857D009E73BB /* lmUserOverride.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5BA0DF2E2817857D009E73BB /* lmUserOverride.swift */; };
+		5BA58646289BCFAC0077D02F /* ShiftKeyUpChecker.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5BA58645289BCFAC0077D02F /* ShiftKeyUpChecker.swift */; };
 		5BA9FD0F27FEDB6B002DE248 /* suiPrefPaneGeneral.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5BA9FD0A27FEDB6B002DE248 /* suiPrefPaneGeneral.swift */; };
 		5BA9FD1027FEDB6B002DE248 /* suiPrefPaneKeyboard.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5BA9FD0B27FEDB6B002DE248 /* suiPrefPaneKeyboard.swift */; };
 		5BA9FD1127FEDB6B002DE248 /* ctlPrefUI.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5BA9FD0C27FEDB6B002DE248 /* ctlPrefUI.swift */; };
@@ -244,6 +245,7 @@
 		5B949BD82816DC5400D87B5D /* LineReader.swift */ = {isa = PBXFileReference; explicitFileType = sourcecode.swift; fileEncoding = 4; lineEnding = 0; path = LineReader.swift; sourceTree = "<group>"; usesTabs = 0; };
 		5B949BDA2816DDBC00D87B5D /* LMConsolidator.swift */ = {isa = PBXFileReference; explicitFileType = sourcecode.swift; fileEncoding = 4; lineEnding = 0; path = LMConsolidator.swift; sourceTree = "<group>"; usesTabs = 0; };
 		5BA0DF2E2817857D009E73BB /* lmUserOverride.swift */ = {isa = PBXFileReference; explicitFileType = sourcecode.swift; fileEncoding = 4; lineEnding = 0; path = lmUserOverride.swift; sourceTree = "<group>"; usesTabs = 0; };
+		5BA58645289BCFAC0077D02F /* ShiftKeyUpChecker.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ShiftKeyUpChecker.swift; sourceTree = "<group>"; };
 		5BA9FD0A27FEDB6B002DE248 /* suiPrefPaneGeneral.swift */ = {isa = PBXFileReference; explicitFileType = sourcecode.swift; fileEncoding = 4; indentWidth = 2; lineEnding = 0; path = suiPrefPaneGeneral.swift; sourceTree = "<group>"; tabWidth = 2; usesTabs = 0; };
 		5BA9FD0B27FEDB6B002DE248 /* suiPrefPaneKeyboard.swift */ = {isa = PBXFileReference; explicitFileType = sourcecode.swift; fileEncoding = 4; indentWidth = 2; lineEnding = 0; path = suiPrefPaneKeyboard.swift; sourceTree = "<group>"; tabWidth = 2; usesTabs = 0; };
 		5BA9FD0C27FEDB6B002DE248 /* ctlPrefUI.swift */ = {isa = PBXFileReference; explicitFileType = sourcecode.swift; fileEncoding = 4; indentWidth = 2; lineEnding = 0; path = ctlPrefUI.swift; sourceTree = "<group>"; tabWidth = 2; usesTabs = 0; };
@@ -441,6 +443,7 @@
 			children = (
 				5B84579B2871AD2200C93B01 /* HotenkaChineseConverter */,
 				5B949BD72816DC4400D87B5D /* LineReader */,
+				5BA58644289BCFAC0077D02F /* Qwertyyb */,
 				5BA9FCEA27FED652002DE248 /* SindreSorhus */,
 				5BA9FD8C28006BA7002DE248 /* VDKComboBox */,
 			);
@@ -624,6 +627,14 @@
 			path = LineReader;
 			sourceTree = "<group>";
 		};
+		5BA58644289BCFAC0077D02F /* Qwertyyb */ = {
+			isa = PBXGroup;
+			children = (
+				5BA58645289BCFAC0077D02F /* ShiftKeyUpChecker.swift */,
+			);
+			path = Qwertyyb;
+			sourceTree = "<group>";
+		};
 		5BA9FCEA27FED652002DE248 /* SindreSorhus */ = {
 			isa = PBXGroup;
 			children = (
@@ -1208,6 +1219,7 @@
 				5B38F59F281E2E49007D5F5D /* 3_NodeAnchor.swift in Sources */,
 				5BFDF011289635C100417BBC /* ctlCandidateIMK.swift in Sources */,
 				5B62A34727AE7CD900A19448 /* ctlCandidate.swift in Sources */,
+				5BA58646289BCFAC0077D02F /* ShiftKeyUpChecker.swift in Sources */,
 				5BA9FD3F27FEF3C8002DE248 /* Pane.swift in Sources */,
 				5BB802DA27FABA8300CF1C19 /* ctlInputMethod_Menu.swift in Sources */,
 				5B38F5A1281E2E49007D5F5D /* 1_Compositor.swift in Sources */,