From b59e36009155b429883f9194c7481b41f8074a52 Mon Sep 17 00:00:00 2001
From: Andy Trand <magtuxgit@gmail.com>
Date: Thu, 2 Dec 2021 20:21:55 +0200
Subject: [PATCH] Custom replaceText handler (#494)

* ukraine language support

* targetChild error temporary fix

* fix attributes compare

* font size parsing fix

* manual replace text handler
---
 lib/src/widgets/controller.dart | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/lib/src/widgets/controller.dart b/lib/src/widgets/controller.dart
index 15104add..d47dce72 100644
--- a/lib/src/widgets/controller.dart
+++ b/lib/src/widgets/controller.dart
@@ -10,11 +10,14 @@ import '../models/documents/style.dart';
 import '../models/quill_delta.dart';
 import '../utils/diff_delta.dart';
 
+typedef ReplaceTextCallback = bool Function(int index, int len, Object? data);
+
 class QuillController extends ChangeNotifier {
   QuillController({
     required this.document,
     required TextSelection selection,
     bool keepStyleOnNewLine = false,
+    this.onReplaceText,
   })  : _selection = selection,
         _keepStyleOnNewLine = keepStyleOnNewLine;
 
@@ -36,6 +39,10 @@ class QuillController extends ChangeNotifier {
   TextSelection get selection => _selection;
   TextSelection _selection;
 
+  /// Manual [replaceText] handler
+  /// Return false to ignore the event
+  ReplaceTextCallback? onReplaceText;
+
   /// Store any styles attribute that got toggled by the tap of a button
   /// and that has not been applied yet.
   /// It gets reset after each format action within the [document].
@@ -115,6 +122,10 @@ class QuillController extends ChangeNotifier {
       {bool ignoreFocus = false}) {
     assert(data is String || data is Embeddable);
 
+    if (onReplaceText != null && !onReplaceText!(index, len, data)) {
+      return;
+    }
+
     Delta? delta;
     if (len > 0 || data is! String || data.isNotEmpty) {
       delta = document.replace(index, len, data);