ctlIME & InputState // Handle InputState.SymbolTable.

Source/Modules/ControllerModules/InputState.swift

@@ -415,6 +415,22 @@ class InputState {
       )
     }
 
+    // InputState.SymbolTable 這個狀態比較特殊，不能把真空組字區交出去。
+    // 不然的話，在絕大多數終端機類應用當中、以及在 MS Word 等軟體當中
+    // 會出現符號選字窗無法響應方向鍵的問題。
+    // 如有誰要修奇摩注音的一點通選單的話，修復原理也是一樣的。
+    // Crediting Qwertyyb: https://github.com/qwertyyb/Fire/issues/55#issuecomment-1133497700
+    override var attributedString: NSAttributedString {
+      let attributedSting = NSAttributedString(
+        string: " ",
+        attributes: [
+          .underlineStyle: NSUnderlineStyle.single.rawValue,
+          .markedClauseSegment: 0,
+        ]
+      )
+      return attributedSting
+    }
+
     override var description: String {
       "<InputState.SymbolTable, candidates:\(candidates), useVerticalMode:\(useVerticalMode),  composingBuffer:\(composingBuffer), cursorIndex:\(cursorIndex)>"
     }

Source/Modules/IMEModules/ctlInputMethod.swift

@@ -234,6 +234,8 @@ extension ctlInputMethod {
       handle(state: newState, previous: previous, client: client)
     } else if let newState = newState as? InputState.AssociatedPhrases {
       handle(state: newState, previous: previous, client: client)
+    } else if let newState = newState as? InputState.SymbolTable {
+      handle(state: newState, previous: previous, client: client)
     }
   }
 
@@ -411,6 +413,22 @@ extension ctlInputMethod {
     show(candidateWindowWith: state, client: client)
   }
 
+  private func handle(state: InputState.SymbolTable, previous _: InputState, client: Any?) {
+    hideTooltip()
+    guard let client = client as? IMKTextInput else {
+      ctlCandidateCurrent?.visible = false
+      return
+    }
+
+    // the selection range is where the cursor is, with the length being 0 and replacement range NSNotFound,
+    // i.e. the client app needs to take care of where to put this composing buffer
+    client.setMarkedText(
+      state.attributedString, selectionRange: NSRange(location: Int(state.cursorIndex), length: 0),
+      replacementRange: NSRange(location: NSNotFound, length: NSNotFound)
+    )
+    show(candidateWindowWith: state, client: client)
+  }
+
   private func handle(state: InputState.AssociatedPhrases, previous _: InputState, client: Any?) {
     hideTooltip()
     guard let client = client as? IMKTextInput else {