From 7885e61e4f8770afe6ce8ef8b700b79bb717bd88 Mon Sep 17 00:00:00 2001
From: wangpw2 <wangpw2@sany.com.cn>
Date: Sun, 2 Apr 2023 21:19:11 +0800
Subject: [PATCH] fix ime bug for windows

---
 ..._editor_state_text_input_client_mixin.dart | 22 ++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

diff --git a/lib/src/widgets/raw_editor/raw_editor_state_text_input_client_mixin.dart b/lib/src/widgets/raw_editor/raw_editor_state_text_input_client_mixin.dart
index 263bcc8c..5f98d56a 100644
--- a/lib/src/widgets/raw_editor/raw_editor_state_text_input_client_mixin.dart
+++ b/lib/src/widgets/raw_editor/raw_editor_state_text_input_client_mixin.dart
@@ -63,6 +63,8 @@ mixin RawEditorStateTextInputClientMixin on EditorState
       );
 
       _updateSizeAndTransform();
+      //update IME position for Windows
+      _updateComposingRectIfNeeded();
       //update IME position for Macos
       _updateCaretRectIfNeeded();
       _textInputConnection!.setEditingState(_lastKnownRemoteTextEditingValue!);
@@ -70,18 +72,32 @@ mixin RawEditorStateTextInputClientMixin on EditorState
     _textInputConnection!.show();
   }
 
+  void _updateComposingRectIfNeeded() {
+    final composingRange = _lastKnownRemoteTextEditingValue?.composing ??
+        textEditingValue.composing;
+    if (hasConnection) {
+      assert(mounted);
+      final offset = composingRange.isValid ? composingRange.start : 0;
+      final composingRect =
+          renderEditor.getLocalRectForCaret(TextPosition(offset: offset));
+      _textInputConnection!.setComposingRect(composingRect);
+      SchedulerBinding.instance
+          .addPostFrameCallback((_) => _updateComposingRectIfNeeded());
+    }
+  }
+
   void _updateCaretRectIfNeeded() {
     if (hasConnection) {
       if (renderEditor.selection.isValid &&
           renderEditor.selection.isCollapsed) {
-        final TextPosition currentTextPosition =
+        final currentTextPosition =
             TextPosition(offset: renderEditor.selection.baseOffset);
-        final Rect caretRect =
+        final caretRect =
             renderEditor.getLocalRectForCaret(currentTextPosition);
         _textInputConnection!.setCaretRect(caretRect);
       }
       SchedulerBinding.instance
-          .addPostFrameCallback((Duration _) => _updateCaretRectIfNeeded());
+          .addPostFrameCallback((_) => _updateCaretRectIfNeeded());
     }
   }