From f91a8aa913870a4c83e6dcff02342d4a5341723b Mon Sep 17 00:00:00 2001
From: dom <githubaccount56556@proton.me>
Date: Sat, 20 Jun 2026 10:32:39 +0800
Subject: [PATCH] fix RichTextField text replace on desktop

Signed-off-by: dom <githubaccount56556@proton.me>
---
 .../flutter/text_field/editable_text.dart     | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/lib/common/widgets/flutter/text_field/editable_text.dart b/lib/common/widgets/flutter/text_field/editable_text.dart
index 8300beafc..3c81f95eb 100644
--- a/lib/common/widgets/flutter/text_field/editable_text.dart
+++ b/lib/common/widgets/flutter/text_field/editable_text.dart
@@ -25,6 +25,7 @@ import 'package:PiliPlus/common/widgets/flutter/text_field/controller.dart';
 import 'package:PiliPlus/common/widgets/flutter/text_field/editable.dart';
 import 'package:PiliPlus/common/widgets/flutter/text_field/spell_check.dart';
 import 'package:PiliPlus/common/widgets/flutter/text_field/text_selection.dart';
+import 'package:PiliPlus/utils/platform_utils.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart'
@@ -3556,6 +3557,8 @@ class EditableTextState extends State<EditableText>
     }
   }
 
+  TextRange? _deletedRange;
+
   @override
   void updateEditingValueWithDeltas(List<TextEditingDelta> textEditingDeltas) {
     if (textEditingDeltas.isEmpty) {
@@ -3564,6 +3567,25 @@ class EditableTextState extends State<EditableText>
     }
     TextEditingValue remoteValue = _value;
     for (final TextEditingDelta delta in textEditingDeltas) {
+      if (PlatformUtils.isDesktop) {
+        if (_deletedRange case final range?) {
+          final deleteDelta = TextEditingDeltaDeletion(
+            oldText: remoteValue.text,
+            deletedRange: range,
+            selection: remoteValue.selection,
+            composing: remoteValue.composing,
+          );
+          _deletedRange = null;
+          widget.controller.syncRichText(deleteDelta);
+        } else if (delta is TextEditingDeltaInsertion &&
+            !remoteValue.selection.isCollapsed) {
+          final offset = delta.textInserted.length;
+          _deletedRange = TextRange(
+            start: remoteValue.selection.start + offset,
+            end: remoteValue.selection.end + offset,
+          );
+        }
+      }
       widget.controller.syncRichText(delta);
       remoteValue = delta.apply(remoteValue);
     }