From 4694189a6c6af65c6a04cab0928c2d901c7f8e9e Mon Sep 17 00:00:00 2001
From: Andy Trand <magtuxgit@gmail.com>
Date: Tue, 7 Dec 2021 12:52:50 +0200
Subject: [PATCH 1/3] add delete handler (#501)

---
 lib/src/widgets/controller.dart                  | 13 ++++++++++++-
 .../raw_editor_state_keyboard_mixin.dart         | 16 ++++++++++------
 2 files changed, 22 insertions(+), 7 deletions(-)

diff --git a/lib/src/widgets/controller.dart b/lib/src/widgets/controller.dart
index d47dce72..bb092646 100644
--- a/lib/src/widgets/controller.dart
+++ b/lib/src/widgets/controller.dart
@@ -11,6 +11,7 @@ import '../models/quill_delta.dart';
 import '../utils/diff_delta.dart';
 
 typedef ReplaceTextCallback = bool Function(int index, int len, Object? data);
+typedef DeleteCallback = void Function(int cursorPosition, bool forward);
 
 class QuillController extends ChangeNotifier {
   QuillController({
@@ -18,6 +19,7 @@ class QuillController extends ChangeNotifier {
     required TextSelection selection,
     bool keepStyleOnNewLine = false,
     this.onReplaceText,
+    this.onDelete,
   })  : _selection = selection,
         _keepStyleOnNewLine = keepStyleOnNewLine;
 
@@ -39,10 +41,13 @@ class QuillController extends ChangeNotifier {
   TextSelection get selection => _selection;
   TextSelection _selection;
 
-  /// Manual [replaceText] handler
+  /// Custom [replaceText] handler
   /// Return false to ignore the event
   ReplaceTextCallback? onReplaceText;
 
+  /// Custom delete handler
+  DeleteCallback? onDelete;
+
   /// 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].
@@ -186,6 +191,12 @@ class QuillController extends ChangeNotifier {
     ignoreFocusOnTextChange = false;
   }
 
+  /// Called in two cases:
+  /// forward == false && textBefore.isEmpty
+  /// forward == true && textAfter.isEmpty
+  void handleDelete(int cursorPosition, bool forward) =>
+      onDelete?.call(cursorPosition, forward);
+
   void formatText(int index, int len, Attribute? attribute) {
     if (len == 0 &&
         attribute!.isInline &&
diff --git a/lib/src/widgets/raw_editor/raw_editor_state_keyboard_mixin.dart b/lib/src/widgets/raw_editor/raw_editor_state_keyboard_mixin.dart
index db860248..72fd5dc2 100644
--- a/lib/src/widgets/raw_editor/raw_editor_state_keyboard_mixin.dart
+++ b/lib/src/widgets/raw_editor/raw_editor_state_keyboard_mixin.dart
@@ -153,12 +153,16 @@ mixin RawEditorStateKeyboardMixin on EditorState {
     final newSelection = TextSelection.collapsed(offset: cursorPosition);
     final newText = textBefore + textAfter;
     final size = plainText.length - newText.length;
-    widget.controller.replaceText(
-      cursorPosition,
-      size,
-      '',
-      newSelection,
-    );
+    if (size == 0) {
+      widget.controller.handleDelete(cursorPosition, forward);
+    } else {
+      widget.controller.replaceText(
+        cursorPosition,
+        size,
+        '',
+        newSelection,
+      );
+    }
   }
 
   TextSelection _jumpToBeginOrEndOfWord(

From 931f7e65137ac977a5a884c8d587f93c4c14a695 Mon Sep 17 00:00:00 2001
From: Andy Trand <magtuxgit@gmail.com>
Date: Tue, 7 Dec 2021 12:53:13 +0200
Subject: [PATCH 2/3] remove newline on concat (#502)

---
 lib/src/models/quill_delta.dart | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/lib/src/models/quill_delta.dart b/lib/src/models/quill_delta.dart
index e4a11055..3cab1910 100644
--- a/lib/src/models/quill_delta.dart
+++ b/lib/src/models/quill_delta.dart
@@ -608,9 +608,28 @@ class Delta {
     }
   }
 
+  /// Removes trailing '\n'
+  void _trimNewLine() {
+    if (isNotEmpty) {
+      final lastOp = _operations.last;
+      final lastOpData = lastOp.data;
+
+      if (lastOpData is String && lastOpData.endsWith('\n')) {
+        _operations.removeLast();
+        if (lastOpData.length > 1) {
+          insert(lastOpData.substring(0, lastOpData.length - 1),
+              lastOp.attributes);
+        }
+      }
+    }
+  }
+
   /// Concatenates [other] with this delta and returns the result.
-  Delta concat(Delta other) {
+  Delta concat(Delta other, {bool trimNewLine = false}) {
     final result = Delta.from(this);
+    if (trimNewLine) {
+      result._trimNewLine();
+    }
     if (other.isNotEmpty) {
       // In case first operation of other can be merged with last operation in
       // our list.

From e265b54b1bcfcd696f81307161b7edf7b6386778 Mon Sep 17 00:00:00 2001
From: X Code <singerdmx@gmail.com>
Date: Tue, 7 Dec 2021 03:18:13 -0800
Subject: [PATCH 3/3] Upgrade to 2.1.0.

---
 CHANGELOG.md | 3 +++
 pubspec.yaml | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 391ce2f1..0704a47e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+## [2.1.0]
+* Add delete handler
+
 ## [2.0.23]
 * Support custom replaceText handler.
 
diff --git a/pubspec.yaml b/pubspec.yaml
index 281475e1..0ed5e01b 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: flutter_quill
 description: A rich text editor supporting mobile and web (Demo App @ bulletjournal.us)
-version: 2.0.23
+version: 2.1.0
 #author: bulletjournal
 homepage: https://bulletjournal.us/home/index.html
 repository: https://github.com/singerdmx/flutter-quill