Sort constructors first

analysis_options.yaml

@@ -29,5 +29,7 @@ linter:
     - prefer_interpolation_to_compose_strings
     - prefer_relative_imports
     - prefer_single_quotes
+    - sort_constructors_first
+    - sort_unnamed_constructors_first
     - unnecessary_parenthesis
     - unnecessary_string_interpolations

example/lib/widgets/demo_scaffold.dart

@@ -11,13 +11,6 @@ typedef DemoContentBuilder = Widget Function(
 
 // Common scaffold for all examples.
 class DemoScaffold extends StatefulWidget {
-  /// Filename of the document to load into the editor.
-  final String documentFilename;
-  final DemoContentBuilder builder;
-  final List<Widget>? actions;
-  final Widget? floatingActionButton;
-  final bool showToolbar;
-
   const DemoScaffold({
     required this.documentFilename,
     required this.builder,
@@ -27,6 +20,13 @@ class DemoScaffold extends StatefulWidget {
     Key? key,
   }) : super(key: key);
 
+  /// Filename of the document to load into the editor.
+  final String documentFilename;
+  final DemoContentBuilder builder;
+  final List<Widget>? actions;
+  final Widget? floatingActionButton;
+  final bool showToolbar;
+
   @override
   _DemoScaffoldState createState() => _DemoScaffoldState();
 }

lib/models/documents/attribute.dart

@@ -8,12 +8,12 @@ enum AttributeScope {
 }
 
 class Attribute<T> {
+  Attribute(this.key, this.scope, this.value);
+
   final String key;
   final AttributeScope scope;
   final T value;
 
-  Attribute(this.key, this.scope, this.value);
-
   static final Map<String, Attribute> _registry = {
     Attribute.bold.key: Attribute.bold,
     Attribute.italic.key: Attribute.italic,

lib/models/documents/document.dart

@@ -15,6 +15,18 @@ import 'style.dart';
 
 /// The rich text document
 class Document {
+  Document() : _delta = Delta()..insert('\n') {
+    _loadDocument(_delta);
+  }
+
+  Document.fromJson(List data) : _delta = _transform(Delta.fromJson(data)) {
+    _loadDocument(_delta);
+  }
+
+  Document.fromDelta(Delta delta) : _delta = delta {
+    _loadDocument(delta);
+  }
+
   /// The root node of the document tree
   final Root _root = Root();
 
@@ -35,18 +47,6 @@ class Document {
 
   Stream<Tuple3<Delta, Delta, ChangeSource>> get changes => _observer.stream;
 
-  Document() : _delta = Delta()..insert('\n') {
-    _loadDocument(_delta);
-  }
-
-  Document.fromJson(List data) : _delta = _transform(Delta.fromJson(data)) {
-    _loadDocument(_delta);
-  }
-
-  Document.fromDelta(Delta delta) : _delta = delta {
-    _loadDocument(delta);
-  }
-
   Delta insert(int index, Object? data) {
     assert(index >= 0);
     assert(data is String || data is Embeddable);

lib/models/documents/history.dart

@@ -4,6 +4,14 @@ import '../quill_delta.dart';
 import 'document.dart';
 
 class History {
+  History({
+    this.ignoreChange = false,
+    this.interval = 400,
+    this.maxStack = 100,
+    this.userOnly = false,
+    this.lastRecorded = 0,
+  });
+
   final HistoryStack stack = HistoryStack.empty();
 
   bool get hasUndo => stack.undo.isNotEmpty;
@@ -24,13 +32,6 @@ class History {
   ///record delay
   final int interval;
 
-  History(
-      {this.ignoreChange = false,
-      this.interval = 400,
-      this.maxStack = 100,
-      this.userOnly = false,
-      this.lastRecorded = 0});
-
   void handleDocChange(Tuple3<Delta, Delta, ChangeSource> change) {
     if (ignoreChange) return;
     if (!userOnly || change.item3 == ChangeSource.LOCAL) {
@@ -119,13 +120,13 @@ class History {
 }
 
 class HistoryStack {
-  final List<Delta> undo;
-  final List<Delta> redo;
-
   HistoryStack.empty()
       : undo = [],
         redo = [];
 
+  final List<Delta> undo;
+  final List<Delta> redo;
+
   void clear() {
     undo.clear();
     redo.clear();

lib/models/documents/nodes/container.dart

@@ -116,9 +116,9 @@ abstract class Container<T extends Node?> extends Node {
 
 /// Query of a child in a Container
 class ChildQuery {
+  ChildQuery(this.node, this.offset);
+
   final Node? node; // null if not found
 
   final int offset;
-
-  ChildQuery(this.node, this.offset);
 }

lib/models/documents/nodes/embed.dart

@@ -1,9 +1,9 @@
 class Embeddable {
+  Embeddable(this.type, this.data);
+
   final String type;
   final dynamic data;
 
-  Embeddable(this.type, this.data);
-
   Map<String, dynamic> toJson() {
     final m = <String, String>{type: data};
     return m;

lib/models/documents/nodes/leaf.dart

@@ -8,12 +8,6 @@ import 'node.dart';
 
 /* A leaf node in document tree */
 abstract class Leaf extends Node {
-  Object _value;
-
-  Object get value => _value;
-
-  Leaf.val(Object val) : _value = val;
-
   factory Leaf(Object data) {
     if (data is Embeddable) {
       return Embed(data);
@@ -23,6 +17,12 @@ abstract class Leaf extends Node {
     return Text(text);
   }
 
+  Leaf.val(Object val) : _value = val;
+
+  Object _value;
+
+  Object get value => _value;
+
   @override
   void applyStyle(Style value) {
     assert(value.isInline || value.isIgnored || value.isEmpty,

lib/models/documents/style.dart

@@ -5,11 +5,11 @@ import 'attribute.dart';
 
 /* Collection of style attributes */
 class Style {
-  final Map<String, Attribute> _attributes;
+  Style() : _attributes = <String, Attribute>{};
 
   Style.attr(this._attributes);
 
-  Style() : _attributes = <String, Attribute>{};
+  final Map<String, Attribute> _attributes;
 
   static Style fromJson(Map<String, dynamic>? attributes) {
     if (attributes == null) {

lib/models/quill_delta.dart

@@ -22,6 +22,29 @@ Object? _passThroughDataDecoder(Object? data) => data;
 
 /// Operation performed on a rich-text document.
 class Operation {
+  Operation._(this.key, this.length, this.data, Map? attributes)
+      : assert(_validKeys.contains(key), 'Invalid operation key "$key".'),
+        assert(() {
+          if (key != Operation.insertKey) return true;
+          return data is String ? data.length == length : length == 1;
+        }(), 'Length of insert operation must be equal to the data length.'),
+        _attributes =
+            attributes != null ? Map<String, dynamic>.from(attributes) : null;
+
+  /// Creates operation which deletes [length] of characters.
+  factory Operation.delete(int length) =>
+      Operation._(Operation.deleteKey, length, '', null);
+
+  /// Creates operation which inserts [text] with optional [attributes].
+  factory Operation.insert(dynamic data, [Map<String, dynamic>? attributes]) =>
+      Operation._(Operation.insertKey, data is String ? data.length : 1, data,
+          attributes);
+
+  /// Creates operation which retains [length] of characters and optionally
+  /// applies attributes.
+  factory Operation.retain(int? length, [Map<String, dynamic>? attributes]) =>
+      Operation._(Operation.retainKey, length, '', attributes);
+
   /// Key of insert operations.
   static const String insertKey = 'insert';
 
@@ -50,15 +73,6 @@ class Operation {
       _attributes == null ? null : Map<String, dynamic>.from(_attributes!);
   final Map<String, dynamic>? _attributes;
 
-  Operation._(this.key, this.length, this.data, Map? attributes)
-      : assert(_validKeys.contains(key), 'Invalid operation key "$key".'),
-        assert(() {
-          if (key != Operation.insertKey) return true;
-          return data is String ? data.length == length : length == 1;
-        }(), 'Length of insert operation must be equal to the data length.'),
-        _attributes =
-            attributes != null ? Map<String, dynamic>.from(attributes) : null;
-
   /// Creates new [Operation] from JSON payload.
   ///
   /// If `dataDecoder` parameter is not null then it is used to additionally
@@ -89,20 +103,6 @@ class Operation {
     return json;
   }
 
-  /// Creates operation which deletes [length] of characters.
-  factory Operation.delete(int length) =>
-      Operation._(Operation.deleteKey, length, '', null);
-
-  /// Creates operation which inserts [text] with optional [attributes].
-  factory Operation.insert(dynamic data, [Map<String, dynamic>? attributes]) =>
-      Operation._(Operation.insertKey, data is String ? data.length : 1, data,
-          attributes);
-
-  /// Creates operation which retains [length] of characters and optionally
-  /// applies attributes.
-  factory Operation.retain(int? length, [Map<String, dynamic>? attributes]) =>
-      Operation._(Operation.retainKey, length, '', attributes);
-
   /// Returns value of this operation.
   ///
   /// For insert operations this returns text, for delete and retain - length.
@@ -180,6 +180,15 @@ class Operation {
 /// "document delta". When delta includes also "retain" or "delete" operations
 /// it is a "change delta".
 class Delta {
+  /// Creates new empty [Delta].
+  factory Delta() => Delta._(<Operation>[]);
+
+  Delta._(List<Operation> operations) : _operations = operations;
+
+  /// Creates new [Delta] from [other].
+  factory Delta.from(Delta other) =>
+      Delta._(List<Operation>.from(other._operations));
+
   /// Transforms two attribute sets.
   static Map<String, dynamic>? transformAttributes(
       Map<String, dynamic>? a, Map<String, dynamic>? b, bool priority) {
@@ -242,15 +251,6 @@ class Delta {
 
   int _modificationCount = 0;
 
-  Delta._(List<Operation> operations) : _operations = operations;
-
-  /// Creates new empty [Delta].
-  factory Delta() => Delta._(<Operation>[]);
-
-  /// Creates new [Delta] from [other].
-  factory Delta.from(Delta other) =>
-      Delta._(List<Operation>.from(other._operations));
-
   /// Creates [Delta] from de-serialized JSON representation.
   ///
   /// If `dataDecoder` parameter is not null then it is used to additionally
@@ -599,13 +599,13 @@ class Delta {
 
 /// Specialized iterator for [Delta]s.
 class DeltaIterator {
+  DeltaIterator(this.delta) : _modificationCount = delta._modificationCount;
+
   final Delta delta;
   final int _modificationCount;
   int _index = 0;
   num _offset = 0;
 
-  DeltaIterator(this.delta) : _modificationCount = delta._modificationCount;
-
   bool get isNextInsert => nextOperationKey == Operation.insertKey;
 
   bool get isNextDelete => nextOperationKey == Operation.deleteKey;

lib/models/rules/rule.dart

@@ -26,6 +26,8 @@ abstract class Rule {
 }
 
 class Rules {
+  Rules(this._rules);
+
   final List<Rule> _rules;
   static final Rules _instance = Rules([
     const FormatLinkAtCaretPositionRule(),
@@ -45,8 +47,6 @@ class Rules {
     const CatchAllDeleteRule(),
   ]);
 
-  Rules(this._rules);
-
   static Rules getInstance() => _instance;
 
   Delta apply(RuleType ruleType, Document document, int index,

lib/utils/diff_delta.dart

@@ -33,6 +33,8 @@ const Set<int> WHITE_SPACE = {
 
 // Diff between two texts - old text and new text
 class Diff {
+  Diff(this.start, this.deleted, this.inserted);
+
   // Start index in old text at which changes begin.
   final int start;
 
@@ -42,8 +44,6 @@ class Diff {
   // The inserted text
   final String inserted;
 
-  Diff(this.start, this.deleted, this.inserted);
-
   @override
   String toString() {
     return 'Diff[$start, "$deleted", "$inserted"]';

lib/widgets/controller.dart

@@ -11,10 +11,6 @@ import '../models/quill_delta.dart';
 import '../utils/diff_delta.dart';
 
 class QuillController extends ChangeNotifier {
-  final Document document;
-  TextSelection selection;
-  Style toggledStyle = Style();
-
   QuillController({required this.document, required this.selection});
 
   factory QuillController.basic() {
@@ -24,6 +20,10 @@ class QuillController extends ChangeNotifier {
     );
   }
 
+  final Document document;
+  TextSelection selection;
+  Style toggledStyle = Style();
+
   // item1: Document state before [change].
   //
   // item2: Change delta applied to the document.

lib/widgets/cursor.dart

@@ -8,15 +8,6 @@ import 'box.dart';
 const Duration _FADE_DURATION = Duration(milliseconds: 250);
 
 class CursorStyle {
-  final Color color;
-  final Color backgroundColor;
-  final double width;
-  final double? height;
-  final Radius? radius;
-  final Offset? offset;
-  final bool opacityAnimates;
-  final bool paintAboveText;
-
   const CursorStyle({
     required this.color,
     required this.backgroundColor,
@@ -28,6 +19,15 @@ class CursorStyle {
     this.paintAboveText = false,
   });
 
+  final Color color;
+  final Color backgroundColor;
+  final double width;
+  final double? height;
+  final Radius? radius;
+  final Offset? offset;
+  final bool opacityAnimates;
+  final bool paintAboveText;
+
   @override
   bool operator ==(Object other) =>
       identical(this, other) ||
@@ -55,14 +55,6 @@ class CursorStyle {
 }
 
 class CursorCont extends ChangeNotifier {
-  final ValueNotifier<bool> show;
-  final ValueNotifier<bool> _blink;
-  final ValueNotifier<Color> color;
-  late AnimationController _blinkOpacityCont;
-  Timer? _cursorTimer;
-  bool _targetCursorVisibility = false;
-  CursorStyle _style;
-
   CursorCont({
     required this.show,
     required CursorStyle style,
@@ -75,6 +67,14 @@ class CursorCont extends ChangeNotifier {
     _blinkOpacityCont.addListener(_onColorTick);
   }
 
+  final ValueNotifier<bool> show;
+  final ValueNotifier<bool> _blink;
+  final ValueNotifier<Color> color;
+  late AnimationController _blinkOpacityCont;
+  Timer? _cursorTimer;
+  bool _targetCursorVisibility = false;
+  CursorStyle _style;
+
   ValueNotifier<bool> get cursorBlink => _blink;
 
   ValueNotifier<Color> get cursorColor => color;
@@ -156,15 +156,15 @@ class CursorCont extends ChangeNotifier {
 }
 
 class CursorPainter {
+  CursorPainter(this.editable, this.style, this.prototype, this.color,
+      this.devicePixelRatio);
+
   final RenderContentProxyBox? editable;
   final CursorStyle style;
   final Rect? prototype;
   final Color color;
   final double devicePixelRatio;
 
-  CursorPainter(this.editable, this.style, this.prototype, this.color,
-      this.devicePixelRatio);
-
   void paint(Canvas canvas, Offset offset, TextPosition position) {
     assert(prototype != null);
 

lib/widgets/default_styles.dart

@@ -3,14 +3,14 @@ import 'package:flutter/widgets.dart';
 import 'package:tuple/tuple.dart';
 
 class QuillStyles extends InheritedWidget {
-  final DefaultStyles data;
-
   const QuillStyles({
     required this.data,
     required Widget child,
     Key? key,
   }) : super(key: key, child: child);
 
+  final DefaultStyles data;
+
   @override
   bool updateShouldNotify(QuillStyles oldWidget) {
     return data != oldWidget.data;
@@ -27,6 +27,13 @@ class QuillStyles extends InheritedWidget {
 }
 
 class DefaultTextBlockStyle {
+  DefaultTextBlockStyle(
+    this.style,
+    this.verticalSpacing,
+    this.lineSpacing,
+    this.decoration,
+  );
+
   final TextStyle style;
 
   final Tuple2<double, double> verticalSpacing;
@@ -34,12 +41,32 @@ class DefaultTextBlockStyle {
   final Tuple2<double, double> lineSpacing;
 
   final BoxDecoration? decoration;
-
-  DefaultTextBlockStyle(
-      this.style, this.verticalSpacing, this.lineSpacing, this.decoration);
 }
 
 class DefaultStyles {
+  DefaultStyles({
+    this.h1,
+    this.h2,
+    this.h3,
+    this.paragraph,
+    this.bold,
+    this.italic,
+    this.underline,
+    this.strikeThrough,
+    this.link,
+    this.color,
+    this.placeHolder,
+    this.lists,
+    this.quote,
+    this.code,
+    this.indent,
+    this.align,
+    this.leading,
+    this.sizeSmall,
+    this.sizeLarge,
+    this.sizeHuge,
+  });
+
   final DefaultTextBlockStyle? h1;
   final DefaultTextBlockStyle? h2;
   final DefaultTextBlockStyle? h3;
@@ -61,28 +88,6 @@ class DefaultStyles {
   final DefaultTextBlockStyle? align;
   final DefaultTextBlockStyle? leading;
 
-  DefaultStyles(
-      {this.h1,
-      this.h2,
-      this.h3,
-      this.paragraph,
-      this.bold,
-      this.italic,
-      this.underline,
-      this.strikeThrough,
-      this.link,
-      this.color,
-      this.placeHolder,
-      this.lists,
-      this.quote,
-      this.code,
-      this.indent,
-      this.align,
-      this.leading,
-      this.sizeSmall,
-      this.sizeLarge,
-      this.sizeHuge});
-
   static DefaultStyles getInstance(BuildContext context) {
     final themeData = Theme.of(context);
     final defaultTextStyle = DefaultTextStyle.of(context);

lib/widgets/delegate.dart

@@ -18,11 +18,11 @@ abstract class EditorTextSelectionGestureDetectorBuilderDelegate {
 }
 
 class EditorTextSelectionGestureDetectorBuilder {
+  EditorTextSelectionGestureDetectorBuilder(this.delegate);
+
   final EditorTextSelectionGestureDetectorBuilderDelegate delegate;
   bool shouldShowSelectionToolbar = true;
 
-  EditorTextSelectionGestureDetectorBuilder(this.delegate);
-
   EditorState? getEditor() {
     return delegate.getEditableTextKey().currentState;
   }

lib/widgets/editor.dart

@@ -114,6 +114,43 @@ Widget _defaultEmbedBuilder(BuildContext context, leaf.Embed node) {
 }
 
 class QuillEditor extends StatefulWidget {
+  const QuillEditor({
+    required this.controller,
+    required this.focusNode,
+    required this.scrollController,
+    required this.scrollable,
+    required this.padding,
+    required this.autoFocus,
+    required this.readOnly,
+    required this.expands,
+    this.showCursor,
+    this.placeholder,
+    this.enableInteractiveSelection = true,
+    this.minHeight,
+    this.maxHeight,
+    this.customStyles,
+    this.textCapitalization = TextCapitalization.sentences,
+    this.keyboardAppearance = Brightness.light,
+    this.scrollPhysics,
+    this.onLaunchUrl,
+    this.embedBuilder = _defaultEmbedBuilder,
+  });
+
+  factory QuillEditor.basic({
+    required QuillController controller,
+    required bool readOnly,
+  }) {
+    return QuillEditor(
+        controller: controller,
+        scrollController: ScrollController(),
+        scrollable: true,
+        focusNode: FocusNode(),
+        autoFocus: true,
+        readOnly: readOnly,
+        expands: false,
+        padding: EdgeInsets.zero);
+  }
+
   final QuillController controller;
   final FocusNode focusNode;
   final ScrollController scrollController;
@@ -134,40 +171,6 @@ class QuillEditor extends StatefulWidget {
   final ValueChanged<String>? onLaunchUrl;
   final EmbedBuilder embedBuilder;
 
-  const QuillEditor(
-      {required this.controller,
-      required this.focusNode,
-      required this.scrollController,
-      required this.scrollable,
-      required this.padding,
-      required this.autoFocus,
-      required this.readOnly,
-      required this.expands,
-      this.showCursor,
-      this.placeholder,
-      this.enableInteractiveSelection = true,
-      this.minHeight,
-      this.maxHeight,
-      this.customStyles,
-      this.textCapitalization = TextCapitalization.sentences,
-      this.keyboardAppearance = Brightness.light,
-      this.scrollPhysics,
-      this.onLaunchUrl,
-      this.embedBuilder = _defaultEmbedBuilder});
-
-  factory QuillEditor.basic(
-      {required QuillController controller, required bool readOnly}) {
-    return QuillEditor(
-        controller: controller,
-        scrollController: ScrollController(),
-        scrollable: true,
-        focusNode: FocusNode(),
-        autoFocus: true,
-        readOnly: readOnly,
-        expands: false,
-        padding: EdgeInsets.zero);
-  }
-
   @override
   _QuillEditorState createState() => _QuillEditorState();
 }
@@ -295,10 +298,10 @@ class _QuillEditorState extends State<QuillEditor>
 
 class _QuillEditorSelectionGestureDetectorBuilder
     extends EditorTextSelectionGestureDetectorBuilder {
-  final _QuillEditorState _state;
-
   _QuillEditorSelectionGestureDetectorBuilder(this._state) : super(_state);
 
+  final _QuillEditorState _state;
+
   @override
   void onForcePressStart(ForcePressDetails details) {
     super.onForcePressStart(details);
@@ -495,6 +498,24 @@ typedef TextSelectionChangedHandler = void Function(
 
 class RenderEditor extends RenderEditableContainerBox
     implements RenderAbstractEditor {
+  RenderEditor(
+    List<RenderEditableBox>? children,
+    TextDirection textDirection,
+    EdgeInsetsGeometry padding,
+    this.document,
+    this.selection,
+    this._hasFocus,
+    this.onSelectionChanged,
+    this._startHandleLayerLink,
+    this._endHandleLayerLink,
+    EdgeInsets floatingCursorAddedMargin,
+  ) : super(
+          children,
+          document.root,
+          textDirection,
+          padding,
+        );
+
   Document document;
   TextSelection selection;
   bool _hasFocus = false;
@@ -510,24 +531,6 @@ class RenderEditor extends RenderEditableContainerBox
   ValueListenable<bool> get selectionEndInViewport => _selectionEndInViewport;
   final ValueNotifier<bool> _selectionEndInViewport = ValueNotifier<bool>(true);
 
-  RenderEditor(
-      List<RenderEditableBox>? children,
-      TextDirection textDirection,
-      EdgeInsetsGeometry padding,
-      this.document,
-      this.selection,
-      this._hasFocus,
-      this.onSelectionChanged,
-      this._startHandleLayerLink,
-      this._endHandleLayerLink,
-      EdgeInsets floatingCursorAddedMargin)
-      : super(
-          children,
-          document.root,
-          textDirection,
-          padding,
-        );
-
   void setDocument(Document doc) {
     if (document == doc) {
       return;
@@ -866,17 +869,20 @@ class RenderEditableContainerBox extends RenderBox
             EditableContainerParentData>,
         RenderBoxContainerDefaultsMixin<RenderEditableBox,
             EditableContainerParentData> {
+  RenderEditableContainerBox(
+    List<RenderEditableBox>? children,
+    this._container,
+    this.textDirection,
+    this._padding,
+  ) : assert(_padding.isNonNegative) {
+    addAll(children);
+  }
+
   container_node.Container _container;
   TextDirection textDirection;
   EdgeInsetsGeometry _padding;
   EdgeInsets? _resolvedPadding;
 
-  RenderEditableContainerBox(List<RenderEditableBox>? children, this._container,
-      this.textDirection, this._padding)
-      : assert(_padding.isNonNegative) {
-    addAll(children);
-  }
-
   container_node.Container getContainer() {
     return _container;
   }

lib/widgets/keyboard_listener.dart

@@ -9,9 +9,12 @@ typedef InputShortcutCallback = void Function(InputShortcut? shortcut);
 typedef OnDeleteCallback = void Function(bool forward);
 
 class KeyboardListener {
+  KeyboardListener(this.onCursorMove, this.onShortcut, this.onDelete);
+
   final CursorMoveCallback onCursorMove;
   final InputShortcutCallback onShortcut;
   final OnDeleteCallback onDelete;
+
   static final Set<LogicalKeyboardKey> _moveKeys = <LogicalKeyboardKey>{
     LogicalKeyboardKey.arrowRight,
     LogicalKeyboardKey.arrowLeft,
@@ -59,8 +62,6 @@ class KeyboardListener {
     LogicalKeyboardKey.keyA: InputShortcut.SELECT_ALL,
   };
 
-  KeyboardListener(this.onCursorMove, this.onShortcut, this.onDelete);
-
   bool handleRawKeyEvent(RawKeyEvent event) {
     if (kIsWeb) {
       // On web platform, we should ignore the key because it's processed already.

lib/widgets/proxy.dart

@@ -4,12 +4,12 @@ import 'package:flutter/widgets.dart';
 import 'box.dart';
 
 class BaselineProxy extends SingleChildRenderObjectWidget {
-  final TextStyle? textStyle;
-  final EdgeInsets? padding;
-
   const BaselineProxy({Key? key, Widget? child, this.textStyle, this.padding})
       : super(key: key, child: child);
 
+  final TextStyle? textStyle;
+  final EdgeInsets? padding;
+
   @override
   RenderBaselineProxy createRenderObject(BuildContext context) {
     return RenderBaselineProxy(
@@ -122,6 +122,18 @@ class RenderEmbedProxy extends RenderProxyBox implements RenderContentProxyBox {
 }
 
 class RichTextProxy extends SingleChildRenderObjectWidget {
+  const RichTextProxy(
+    RichText child,
+    this.textStyle,
+    this.textAlign,
+    this.textDirection,
+    this.textScaleFactor,
+    this.locale,
+    this.strutStyle,
+    this.textWidthBasis,
+    this.textHeightBehavior,
+  ) : super(child: child);
+
   final TextStyle textStyle;
   final TextAlign textAlign;
   final TextDirection textDirection;
@@ -145,18 +157,6 @@ class RichTextProxy extends SingleChildRenderObjectWidget {
         textHeightBehavior);
   }
 
-  const RichTextProxy(
-      RichText child,
-      this.textStyle,
-      this.textAlign,
-      this.textDirection,
-      this.textScaleFactor,
-      this.locale,
-      this.strutStyle,
-      this.textWidthBasis,
-      this.textHeightBehavior)
-      : super(child: child);
-
   @override
   void updateRenderObject(
       BuildContext context, covariant RenderParagraphProxy renderObject) {

lib/widgets/raw_editor.dart

@@ -28,6 +28,39 @@ import 'text_line.dart';
 import 'text_selection.dart';
 
 class RawEditor extends StatefulWidget {
+  const RawEditor(
+    Key key,
+    this.controller,
+    this.focusNode,
+    this.scrollController,
+    this.scrollable,
+    this.padding,
+    this.readOnly,
+    this.placeholder,
+    this.onLaunchUrl,
+    this.toolbarOptions,
+    this.showSelectionHandles,
+    bool? showCursor,
+    this.cursorStyle,
+    this.textCapitalization,
+    this.maxHeight,
+    this.minHeight,
+    this.customStyles,
+    this.expands,
+    this.autoFocus,
+    this.selectionColor,
+    this.selectionCtrls,
+    this.keyboardAppearance,
+    this.enableInteractiveSelection,
+    this.scrollPhysics,
+    this.embedBuilder,
+  )   : assert(maxHeight == null || maxHeight > 0, 'maxHeight cannot be null'),
+        assert(minHeight == null || minHeight >= 0, 'minHeight cannot be null'),
+        assert(maxHeight == null || minHeight == null || maxHeight >= minHeight,
+            'maxHeight cannot be null'),
+        showCursor = showCursor ?? true,
+        super(key: key);
+
   final QuillController controller;
   final FocusNode focusNode;
   final ScrollController scrollController;
@@ -53,39 +86,6 @@ class RawEditor extends StatefulWidget {
   final ScrollPhysics? scrollPhysics;
   final EmbedBuilder embedBuilder;
 
-  const RawEditor(
-      Key key,
-      this.controller,
-      this.focusNode,
-      this.scrollController,
-      this.scrollable,
-      this.padding,
-      this.readOnly,
-      this.placeholder,
-      this.onLaunchUrl,
-      this.toolbarOptions,
-      this.showSelectionHandles,
-      bool? showCursor,
-      this.cursorStyle,
-      this.textCapitalization,
-      this.maxHeight,
-      this.minHeight,
-      this.customStyles,
-      this.expands,
-      this.autoFocus,
-      this.selectionColor,
-      this.selectionCtrls,
-      this.keyboardAppearance,
-      this.enableInteractiveSelection,
-      this.scrollPhysics,
-      this.embedBuilder)
-      : assert(maxHeight == null || maxHeight > 0, 'maxHeight cannot be null'),
-        assert(minHeight == null || minHeight >= 0, 'minHeight cannot be null'),
-        assert(maxHeight == null || minHeight == null || maxHeight >= minHeight,
-            'maxHeight cannot be null'),
-        showCursor = showCursor ?? true,
-        super(key: key);
-
   @override
   State<StatefulWidget> createState() {
     return RawEditorState();

lib/widgets/responsive_widget.dart

@@ -1,10 +1,6 @@
 import 'package:flutter/material.dart';
 
 class ResponsiveWidget extends StatelessWidget {
-  final Widget largeScreen;
-  final Widget? mediumScreen;
-  final Widget? smallScreen;
-
   const ResponsiveWidget({
     required this.largeScreen,
     this.mediumScreen,
@@ -12,6 +8,10 @@ class ResponsiveWidget extends StatelessWidget {
     Key? key,
   }) : super(key: key);
 
+  final Widget largeScreen;
+  final Widget? mediumScreen;
+  final Widget? smallScreen;
+
   static bool isSmallScreen(BuildContext context) {
     return MediaQuery.of(context).size.width < 800;
   }

lib/widgets/text_block.dart

@@ -47,6 +47,21 @@ const List<String> romanNumbers = [
 ];
 
 class EditableTextBlock extends StatelessWidget {
+  const EditableTextBlock(
+    this.block,
+    this.textDirection,
+    this.verticalSpacing,
+    this.textSelection,
+    this.color,
+    this.styles,
+    this.enableInteractiveSelection,
+    this.hasFocus,
+    this.contentPadding,
+    this.embedBuilder,
+    this.cursorCont,
+    this.indentLevelCounts,
+  );
+
   final Block block;
   final TextDirection textDirection;
   final Tuple2 verticalSpacing;
@@ -60,20 +75,6 @@ class EditableTextBlock extends StatelessWidget {
   final CursorCont cursorCont;
   final Map<int, int> indentLevelCounts;
 
-  const EditableTextBlock(
-      this.block,
-      this.textDirection,
-      this.verticalSpacing,
-      this.textSelection,
-      this.color,
-      this.styles,
-      this.enableInteractiveSelection,
-      this.hasFocus,
-      this.contentPadding,
-      this.embedBuilder,
-      this.cursorCont,
-      this.indentLevelCounts);
-
   @override
   Widget build(BuildContext context) {
     assert(debugCheckHasMediaQuery(context));
@@ -509,16 +510,21 @@ class RenderEditableTextBlock extends RenderEditableContainerBox
 }
 
 class _EditableBlock extends MultiChildRenderObjectWidget {
+  _EditableBlock(
+    this.block,
+    this.textDirection,
+    this.padding,
+    this.decoration,
+    this.contentPadding,
+    List<Widget> children,
+  ) : super(children: children);
+
   final Block block;
   final TextDirection textDirection;
   final Tuple2<double, double> padding;
   final Decoration decoration;
   final EdgeInsets? contentPadding;
 
-  _EditableBlock(this.block, this.textDirection, this.padding, this.decoration,
-      this.contentPadding, List<Widget> children)
-      : super(children: children);
-
   EdgeInsets get _padding =>
       EdgeInsets.only(top: padding.item1, bottom: padding.item2);
 
@@ -548,15 +554,6 @@ class _EditableBlock extends MultiChildRenderObjectWidget {
 }
 
 class _NumberPoint extends StatelessWidget {
-  final int index;
-  final Map<int?, int> indentLevelCounts;
-  final int count;
-  final TextStyle style;
-  final double width;
-  final Map<String, Attribute> attrs;
-  final bool withDot;
-  final double padding;
-
   const _NumberPoint({
     required this.index,
     required this.indentLevelCounts,
@@ -569,6 +566,15 @@ class _NumberPoint extends StatelessWidget {
     Key? key,
   }) : super(key: key);
 
+  final int index;
+  final Map<int?, int> indentLevelCounts;
+  final int count;
+  final TextStyle style;
+  final double width;
+  final Map<String, Attribute> attrs;
+  final bool withDot;
+  final double padding;
+
   @override
   Widget build(BuildContext context) {
     var s = index.toString();
@@ -652,15 +658,15 @@ class _NumberPoint extends StatelessWidget {
 }
 
 class _BulletPoint extends StatelessWidget {
-  final TextStyle style;
-  final double width;
-
   const _BulletPoint({
     required this.style,
     required this.width,
     Key? key,
   }) : super(key: key);
 
+  final TextStyle style;
+  final double width;
+
   @override
   Widget build(BuildContext context) {
     return Container(
@@ -673,12 +679,13 @@ class _BulletPoint extends StatelessWidget {
 }
 
 class _Checkbox extends StatefulWidget {
+  const _Checkbox({Key? key, this.style, this.width, this.isChecked})
+      : super(key: key);
+
   final TextStyle? style;
   final double? width;
   final bool? isChecked;
 
-  const _Checkbox({Key? key, this.style, this.width, this.isChecked})
-      : super(key: key);
   @override
   __CheckboxState createState() => __CheckboxState();
 }

lib/widgets/text_line.dart

@@ -20,11 +20,6 @@ import 'proxy.dart';
 import 'text_selection.dart';
 
 class TextLine extends StatelessWidget {
-  final Line line;
-  final TextDirection? textDirection;
-  final EmbedBuilder embedBuilder;
-  final DefaultStyles styles;
-
   const TextLine({
     required this.line,
     required this.embedBuilder,
@@ -33,6 +28,11 @@ class TextLine extends StatelessWidget {
     Key? key,
   }) : super(key: key);
 
+  final Line line;
+  final TextDirection? textDirection;
+  final EmbedBuilder embedBuilder;
+  final DefaultStyles styles;
+
   @override
   Widget build(BuildContext context) {
     assert(debugCheckHasMediaQuery(context));
@@ -194,6 +194,21 @@ class TextLine extends StatelessWidget {
 }
 
 class EditableTextLine extends RenderObjectWidget {
+  const EditableTextLine(
+    this.line,
+    this.leading,
+    this.body,
+    this.indentWidth,
+    this.verticalSpacing,
+    this.textDirection,
+    this.textSelection,
+    this.color,
+    this.enableInteractiveSelection,
+    this.hasFocus,
+    this.devicePixelRatio,
+    this.cursorCont,
+  );
+
   final Line line;
   final Widget? leading;
   final Widget body;
@@ -207,20 +222,6 @@ class EditableTextLine extends RenderObjectWidget {
   final double devicePixelRatio;
   final CursorCont cursorCont;
 
-  const EditableTextLine(
-      this.line,
-      this.leading,
-      this.body,
-      this.indentWidth,
-      this.verticalSpacing,
-      this.textDirection,
-      this.textSelection,
-      this.color,
-      this.enableInteractiveSelection,
-      this.hasFocus,
-      this.devicePixelRatio,
-      this.cursorCont);
-
   @override
   RenderObjectElement createElement() {
     return _TextLineElement(this);
@@ -266,6 +267,18 @@ class EditableTextLine extends RenderObjectWidget {
 enum TextLineSlot { LEADING, BODY }
 
 class RenderEditableTextLine extends RenderEditableBox {
+  RenderEditableTextLine(
+    this.line,
+    this.textDirection,
+    this.textSelection,
+    this.enableInteractiveSelection,
+    this.hasFocus,
+    this.devicePixelRatio,
+    this.padding,
+    this.color,
+    this.cursorCont,
+  );
+
   RenderBox? _leading;
   RenderContentProxyBox? _body;
   Line line;
@@ -283,17 +296,6 @@ class RenderEditableTextLine extends RenderEditableBox {
   Rect? _caretPrototype;
   final Map<TextLineSlot, RenderBox> children = <TextLineSlot, RenderBox>{};
 
-  RenderEditableTextLine(
-      this.line,
-      this.textDirection,
-      this.textSelection,
-      this.enableInteractiveSelection,
-      this.hasFocus,
-      this.devicePixelRatio,
-      this.padding,
-      this.color,
-      this.cursorCont);
-
   Iterable<RenderBox> get _children sync* {
     if (_leading != null) {
       yield _leading!;

lib/widgets/text_selection.dart

@@ -24,6 +24,27 @@ TextSelection localSelection(Node node, TextSelection selection, fromParent) {
 enum _TextSelectionHandlePosition { START, END }
 
 class EditorTextSelectionOverlay {
+  EditorTextSelectionOverlay(
+    this.value,
+    this.handlesVisible,
+    this.context,
+    this.debugRequiredFor,
+    this.toolbarLayerLink,
+    this.startHandleLayerLink,
+    this.endHandleLayerLink,
+    this.renderObject,
+    this.selectionCtrls,
+    this.selectionDelegate,
+    this.dragStartBehavior,
+    this.onSelectionHandleTapped,
+    this.clipboardStatus,
+  ) {
+    final overlay = Overlay.of(context, rootOverlay: true)!;
+
+    _toolbarController = AnimationController(
+        duration: const Duration(milliseconds: 150), vsync: overlay);
+  }
+
   TextEditingValue value;
   bool handlesVisible = false;
   final BuildContext context;
@@ -41,26 +62,6 @@ class EditorTextSelectionOverlay {
   List<OverlayEntry>? _handles;
   OverlayEntry? toolbar;
 
-  EditorTextSelectionOverlay(
-      this.value,
-      this.handlesVisible,
-      this.context,
-      this.debugRequiredFor,
-      this.toolbarLayerLink,
-      this.startHandleLayerLink,
-      this.endHandleLayerLink,
-      this.renderObject,
-      this.selectionCtrls,
-      this.selectionDelegate,
-      this.dragStartBehavior,
-      this.onSelectionHandleTapped,
-      this.clipboardStatus) {
-    final overlay = Overlay.of(context, rootOverlay: true)!;
-
-    _toolbarController = AnimationController(
-        duration: const Duration(milliseconds: 150), vsync: overlay);
-  }
-
   TextSelection get _selection => value.selection;
 
   Animation<double> get _toolbarOpacity => _toolbarController.view;

lib/widgets/toolbar.dart

@@ -21,15 +21,15 @@ typedef OnImagePickCallback = Future<String> Function(File file);
 typedef ImagePickImpl = Future<String> Function(ImageSource source);
 
 class InsertEmbedButton extends StatelessWidget {
-  final QuillController controller;
-  final IconData icon;
-
   const InsertEmbedButton({
     required this.controller,
     required this.icon,
     Key? key,
   }) : super(key: key);
 
+  final QuillController controller;
+  final IconData icon;
+
   @override
   Widget build(BuildContext context) {
     return QuillIconButton(
@@ -52,15 +52,15 @@ class InsertEmbedButton extends StatelessWidget {
 }
 
 class LinkStyleButton extends StatefulWidget {
-  final QuillController controller;
-  final IconData? icon;
-
   const LinkStyleButton({
     required this.controller,
     this.icon,
     Key? key,
   }) : super(key: key);
 
+  final QuillController controller;
+  final IconData? icon;
+
   @override
   _LinkStyleButtonState createState() => _LinkStyleButtonState();
 }
@@ -174,14 +174,6 @@ typedef ToggleStyleButtonBuilder = Widget Function(
 );
 
 class ToggleStyleButton extends StatefulWidget {
-  final Attribute attribute;
-
-  final IconData icon;
-
-  final QuillController controller;
-
-  final ToggleStyleButtonBuilder childBuilder;
-
   const ToggleStyleButton({
     required this.attribute,
     required this.icon,
@@ -190,6 +182,14 @@ class ToggleStyleButton extends StatefulWidget {
     Key? key,
   }) : super(key: key);
 
+  final Attribute attribute;
+
+  final IconData icon;
+
+  final QuillController controller;
+
+  final ToggleStyleButtonBuilder childBuilder;
+
   @override
   _ToggleStyleButtonState createState() => _ToggleStyleButtonState();
 }
@@ -258,14 +258,6 @@ class _ToggleStyleButtonState extends State<ToggleStyleButton> {
 }
 
 class ToggleCheckListButton extends StatefulWidget {
-  final IconData icon;
-
-  final QuillController controller;
-
-  final ToggleStyleButtonBuilder childBuilder;
-
-  final Attribute attribute;
-
   const ToggleCheckListButton({
     required this.icon,
     required this.controller,
@@ -274,6 +266,14 @@ class ToggleCheckListButton extends StatefulWidget {
     Key? key,
   }) : super(key: key);
 
+  final IconData icon;
+
+  final QuillController controller;
+
+  final ToggleStyleButtonBuilder childBuilder;
+
+  final Attribute attribute;
+
   @override
   _ToggleCheckListButtonState createState() => _ToggleCheckListButtonState();
 }
@@ -369,11 +369,11 @@ Widget defaultToggleStyleButtonBuilder(
 }
 
 class SelectHeaderStyleButton extends StatefulWidget {
-  final QuillController controller;
-
   const SelectHeaderStyleButton({required this.controller, Key? key})
       : super(key: key);
 
+  final QuillController controller;
+
   @override
   _SelectHeaderStyleButtonState createState() =>
       _SelectHeaderStyleButtonState();
@@ -490,6 +490,15 @@ Widget _selectHeadingStyleButtonBuilder(BuildContext context, Attribute? value,
 }
 
 class ImageButton extends StatefulWidget {
+  const ImageButton({
+    required this.icon,
+    required this.controller,
+    required this.imageSource,
+    this.onImagePickCallback,
+    this.imagePickImpl,
+    Key? key,
+  }) : super(key: key);
+
   final IconData icon;
 
   final QuillController controller;
@@ -500,15 +509,6 @@ class ImageButton extends StatefulWidget {
 
   final ImageSource imageSource;
 
-  const ImageButton({
-    required this.icon,
-    required this.controller,
-    required this.imageSource,
-    this.onImagePickCallback,
-    this.imagePickImpl,
-    Key? key,
-  }) : super(key: key);
-
   @override
   _ImageButtonState createState() => _ImageButtonState();
 }
@@ -602,10 +602,6 @@ class _ImageButtonState extends State<ImageButton> {
 /// When pressed, this button displays overlay toolbar with
 /// buttons for each color.
 class ColorButton extends StatefulWidget {
-  final IconData icon;
-  final bool background;
-  final QuillController controller;
-
   const ColorButton({
     required this.icon,
     required this.controller,
@@ -613,6 +609,10 @@ class ColorButton extends StatefulWidget {
     Key? key,
   }) : super(key: key);
 
+  final IconData icon;
+  final bool background;
+  final QuillController controller;
+
   @override
   _ColorButtonState createState() => _ColorButtonState();
 }
@@ -740,10 +740,6 @@ class _ColorButtonState extends State<ColorButton> {
 }
 
 class HistoryButton extends StatefulWidget {
-  final IconData icon;
-  final bool undo;
-  final QuillController controller;
-
   const HistoryButton({
     required this.icon,
     required this.controller,
@@ -751,6 +747,10 @@ class HistoryButton extends StatefulWidget {
     Key? key,
   }) : super(key: key);
 
+  final IconData icon;
+  final bool undo;
+  final QuillController controller;
+
   @override
   _HistoryButtonState createState() => _HistoryButtonState();
 }
@@ -812,10 +812,6 @@ class _HistoryButtonState extends State<HistoryButton> {
 }
 
 class IndentButton extends StatefulWidget {
-  final IconData icon;
-  final QuillController controller;
-  final bool isIncrease;
-
   const IndentButton({
     required this.icon,
     required this.controller,
@@ -823,6 +819,10 @@ class IndentButton extends StatefulWidget {
     Key? key,
   }) : super(key: key);
 
+  final IconData icon;
+  final QuillController controller;
+  final bool isIncrease;
+
   @override
   _IndentButtonState createState() => _IndentButtonState();
 }
@@ -867,16 +867,16 @@ class _IndentButtonState extends State<IndentButton> {
 }
 
 class ClearFormatButton extends StatefulWidget {
-  final IconData icon;
-
-  final QuillController controller;
-
   const ClearFormatButton({
     required this.icon,
     required this.controller,
     Key? key,
   }) : super(key: key);
 
+  final IconData icon;
+
+  final QuillController controller;
+
   @override
   _ClearFormatButtonState createState() => _ClearFormatButtonState();
 }
@@ -903,8 +903,6 @@ class _ClearFormatButtonState extends State<ClearFormatButton> {
 }
 
 class QuillToolbar extends StatefulWidget implements PreferredSizeWidget {
-  final List<Widget> children;
-
   const QuillToolbar({required this.children, Key? key}) : super(key: key);
 
   factory QuillToolbar.basic({
@@ -1117,6 +1115,8 @@ class QuillToolbar extends StatefulWidget implements PreferredSizeWidget {
     ]);
   }
 
+  final List<Widget> children;
+
   @override
   _QuillToolbarState createState() => _QuillToolbarState();
 
@@ -1148,13 +1148,6 @@ class _QuillToolbarState extends State<QuillToolbar> {
 }
 
 class QuillIconButton extends StatelessWidget {
-  final VoidCallback? onPressed;
-  final Widget? icon;
-  final double size;
-  final Color? fillColor;
-  final double hoverElevation;
-  final double highlightElevation;
-
   const QuillIconButton({
     required this.onPressed,
     this.icon,
@@ -1165,6 +1158,13 @@ class QuillIconButton extends StatelessWidget {
     Key? key,
   }) : super(key: key);
 
+  final VoidCallback? onPressed;
+  final Widget? icon;
+  final double size;
+  final Color? fillColor;
+  final double hoverElevation;
+  final double highlightElevation;
+
   @override
   Widget build(BuildContext context) {
     return ConstrainedBox(
@@ -1184,15 +1184,6 @@ class QuillIconButton extends StatelessWidget {
 }
 
 class QuillDropdownButton<T> extends StatefulWidget {
-  final double height;
-  final Color? fillColor;
-  final double hoverElevation;
-  final double highlightElevation;
-  final Widget child;
-  final T initialValue;
-  final List<PopupMenuEntry<T>> items;
-  final ValueChanged<T> onSelected;
-
   const QuillDropdownButton({
     required this.child,
     required this.initialValue,
@@ -1205,6 +1196,15 @@ class QuillDropdownButton<T> extends StatefulWidget {
     Key? key,
   }) : super(key: key);
 
+  final double height;
+  final Color? fillColor;
+  final double hoverElevation;
+  final double highlightElevation;
+  final Widget child;
+  final T initialValue;
+  final List<PopupMenuEntry<T>> items;
+  final ValueChanged<T> onSelected;
+
   @override
   _QuillDropdownButtonState<T> createState() => _QuillDropdownButtonState<T>();
 }