KeyHandler // Stop cursor from cutting chars.

Source/Modules/ControllerModules/KeyHandler_Core.swift

@@ -49,6 +49,8 @@ protocol KeyHandlerDelegate {
 class KeyHandler {
   /// 半衰模組的衰減指數
   let kEpsilon: Double = 0.000001
+  /// 檢測是否出現游標切斷組字圈內字符的情況
+  var isCursorCuttingChar = false
 
   /// 規定最大動態爬軌範圍。組字器內超出該範圍的節錨都會被自動標記為「已經手動選字過」，減少爬軌運算負擔。
   let kMaxComposingBufferNeedsToWalkSize = Int(max(12, ceil(Double(mgrPrefs.composingBufferSize) / 2)))

Source/Modules/ControllerModules/KeyHandler_States.swift

@@ -156,7 +156,11 @@ extension KeyHandler {
 
     /// 給工具提示設定提示配色。
     if !stateResult.tooltip.isEmpty {
+      isCursorCuttingChar = true
       ctlInputMethod.tooltipController.setColor(state: .denialOverflow)
+    } else {
+      isCursorCuttingChar = false
+      ctlInputMethod.tooltipController.setColor(state: .normal)
     }
 
     return stateResult
@@ -659,6 +663,7 @@ extension KeyHandler {
         stateCallback(state)
       }
     } else if input.isOptionHold {
+      isCursorCuttingChar = false
       if input.isControlHold {
         return handleEnd(state: state, stateCallback: stateCallback, errorCallback: errorCallback)
       }
@@ -673,7 +678,12 @@ extension KeyHandler {
     } else {
       if compositor.cursor < compositor.length {
         compositor.cursor += 1
-        stateCallback(buildInputtingState)
+        var inputtingState = buildInputtingState
+        if isCursorCuttingChar == true {
+          compositor.jumpCursorBySpan(to: .front)
+          inputtingState = buildInputtingState
+        }
+        stateCallback(inputtingState)
       } else {
         IME.prtDebugIntel("A96AAD58")
         errorCallback()
@@ -727,6 +737,7 @@ extension KeyHandler {
         stateCallback(state)
       }
     } else if input.isOptionHold {
+      isCursorCuttingChar = false
       if input.isControlHold {
         return handleHome(state: state, stateCallback: stateCallback, errorCallback: errorCallback)
       }
@@ -741,7 +752,12 @@ extension KeyHandler {
     } else {
       if compositor.cursor > 0 {
         compositor.cursor -= 1
-        stateCallback(buildInputtingState)
+        var inputtingState = buildInputtingState
+        if isCursorCuttingChar == true {
+          compositor.jumpCursorBySpan(to: .rear)
+          inputtingState = buildInputtingState
+        }
+        stateCallback(inputtingState)
       } else {
         IME.prtDebugIntel("7045E6F3")
         errorCallback()