InputHandler // Move some case-switch results to InputMode enum.

Packages/vChewing_MainAssembly/Sources/MainAssembly/InputHandler/InputHandler_HandleComposition.swift

@@ -422,16 +422,9 @@ private extension InputHandler {
         delegate.switchState(updatedState)
         return true
       }
-      let encoding: CFStringEncodings? = {
-        switch IMEApp.currentInputMode {
-        case .imeModeCHS: return .GB_18030_2000
-        case .imeModeCHT: return .big5_HKSCS_1999
-        default: return nil
-        }
-      }()
       guard
         var char = "\(strCodePointBuffer)\(input.text)"
-        .parsedAsHexLiteral(encoding: encoding)?.first?.description
+        .parsedAsHexLiteral(encoding: IMEApp.currentInputMode.nonUTFEncoding)?.first?.description
       else {
         delegate.callError("D220B880：輸入的字碼沒有對應的字元。")
         var updatedState = IMEState.ofAbortion()

Packages/vChewing_MainAssembly/Sources/MainAssembly/InputHandler/InputHandler_TypingMethod.swift

@@ -30,12 +30,8 @@ public extension InputHandler {
       case .codePoint:
         let commonTerm = NSMutableString()
         commonTerm.insert("Code Point Input.".localized, at: 0)
-        if !vertical {
-          switch IMEApp.currentInputMode {
-          case .imeModeCHS: commonTerm.insert("[GB] ", at: 0)
-          case .imeModeCHT: commonTerm.insert("[Big5] ", at: 0)
-          default: break
-          }
+        if !vertical, let initials = IMEApp.currentInputMode.nonUTFEncodingInitials {
+          commonTerm.insert("[\(initials)] ", at: 0)
         }
         return commonTerm.description
       case .haninKeyboardSymbol:

Packages/vChewing_Shared/Sources/Shared/Shared.swift

@@ -252,6 +252,22 @@ public enum Shared {
         return "Please select…"
       }
     }
+
+    public var nonUTFEncoding: CFStringEncodings? {
+      switch self {
+      case .imeModeCHS: return .GB_18030_2000
+      case .imeModeCHT: return .big5_HKSCS_1999
+      default: return nil
+      }
+    }
+
+    public var nonUTFEncodingInitials: String? {
+      switch self {
+      case .imeModeCHS: return "GB"
+      case .imeModeCHT: return "Big5"
+      default: return nil
+      }
+    }
   }
 }