Remove unnecessary checks

lib/models/documents/nodes/embed.dart

@@ -3,8 +3,7 @@ class Embeddable {
   final dynamic data;
 
   Embeddable(this.type, this.data)
-      : assert(type != null),
-        assert(data != null);
+      ;
 
   Map<String, dynamic> toJson() {
     Map<String, String> m = {type: data};

lib/models/documents/nodes/leaf.dart

@@ -27,7 +27,7 @@ abstract class Leaf extends Node {
   @override
   void applyStyle(Style value) {
     assert(
-        value != null && (value.isInline || value.isIgnored || value.isEmpty),
+         (value.isInline || value.isIgnored || value.isEmpty),
         'Unable to apply Style to leaf: $value');
     super.applyStyle(value);
   }
@@ -52,7 +52,7 @@ abstract class Leaf extends Node {
 
   @override
   insert(int index, Object data, Style? style) {
-    assert(data != null && index >= 0 && index <= length);
+    assert(index >= 0 && index <= length);
     Leaf node = Leaf(data);
     if (index < length) {
       splitAt(index)!.insertBefore(node);

lib/models/documents/nodes/node.dart

@@ -19,9 +19,6 @@ abstract class Node extends LinkedListEntry<Node> {
   }
 
   void applyStyle(Style value) {
-    if (value == null) {
-      throw ArgumentError('null value');
-    }
     _style = _style.mergeAll(value);
   }
 

lib/models/quill_delta.dart

@@ -51,7 +51,7 @@ class Operation {
   final Map<String, dynamic>? _attributes;
 
   Operation._(this.key, this.length, this.data, Map? attributes)
-      : assert(key != null && length != null && data != null),
+      : 
         assert(_validKeys.contains(key), 'Invalid operation key "$key".'),
         assert(() {
           if (key != Operation.insertKey) return true;
@@ -243,7 +243,7 @@ class Delta {
   int _modificationCount = 0;
 
   Delta._(List<Operation> operations)
-      : assert(operations != null),
+      :
         _operations = operations;
 
   /// Creates new empty [Delta].
@@ -312,7 +312,6 @@ class Delta {
 
   /// Insert [data] at current position.
   void insert(dynamic data, [Map<String, dynamic>? attributes]) {
-    assert(data != null);
     if (data is String && data.isEmpty) return; // no-op
     push(Operation.insert(data, attributes));
   }
@@ -326,7 +325,7 @@ class Delta {
 
   void _mergeWithTail(Operation operation) {
     assert(isNotEmpty);
-    assert(operation != null && last.key == operation.key);
+    assert(last.key == operation.key);
     assert(operation.data is String && last.data is String);
 
     final length = operation.length! + last.length!;
@@ -640,8 +639,6 @@ class DeltaIterator {
   /// Optional [length] specifies maximum length of operation to return. Note
   /// that actual length of returned operation may be less than specified value.
   Operation next([int length = 4294967296]) {
-    assert(length != null);
-
     if (_modificationCount != delta._modificationCount) {
       throw ConcurrentModificationError(delta);
     }

lib/models/rules/insert.dart

@@ -341,9 +341,7 @@ class PreserveInlineStylesRule extends InsertRule {
       ..retain(index)
       ..insert(text, attributes.isEmpty ? null : attributes);
     Operation next = itr.next();
-    if (next == null) {
-      return delta;
-    }
+    
     Map<String, dynamic> nextAttributes =
         next.attributes ?? const <String, dynamic>{};
     if (!nextAttributes.containsKey(Attribute.link.key)) {

lib/models/rules/rule.dart

@@ -13,8 +13,6 @@ abstract class Rule {
 
   Delta? apply(Delta document, int index,
       {int? len, Object? data, Attribute? attribute}) {
-    assert(document != null);
-    assert(index != null);
     validateArgs(len, data, attribute);
     return applyRule(document, index,
         len: len, data: data, attribute: attribute);

lib/widgets/controller.dart

@@ -15,8 +15,7 @@ class QuillController extends ChangeNotifier {
   Style toggledStyle = Style();
 
   QuillController({required this.document, required this.selection})
-      : assert(document != null),
-        assert(selection != null);
+      ;
 
   factory QuillController.basic() {
     return QuillController(
@@ -86,7 +85,7 @@ class QuillController extends ChangeNotifier {
         print('document.replace failed: $e');
         throw e;
       }
-      bool shouldRetainDelta = delta != null &&
+      bool shouldRetainDelta = 
           toggledStyle.isNotEmpty &&
           delta.isNotEmpty &&
           delta.length <= 2 &&
@@ -165,9 +164,7 @@ class QuillController extends ChangeNotifier {
     if (delta.isNotEmpty) {
       document.compose(delta, source);
     }
-    if (textSelection != null) {
-      _updateSelection(textSelection, source);
-    } else {
+    
       textSelection = selection.copyWith(
           baseOffset:
               delta.transformPosition(selection.baseOffset, force: false),
@@ -176,7 +173,7 @@ class QuillController extends ChangeNotifier {
       if (selection != textSelection) {
         _updateSelection(textSelection, source);
       }
-    }
+    
     notifyListeners();
   }
 
@@ -187,8 +184,6 @@ class QuillController extends ChangeNotifier {
   }
 
   _updateSelection(TextSelection textSelection, ChangeSource source) {
-    assert(textSelection != null);
-    assert(source != null);
     selection = textSelection;
     int end = document.length - 1;
     selection = selection.copyWith(

lib/widgets/default_styles.dart

@@ -9,8 +9,7 @@ class QuillStyles extends InheritedWidget {
     Key? key,
     required this.data,
     required Widget child,
-  })  : assert(data != null),
-        assert(child != null),
+  })  :
         super(key: key, child: child);
 
   @override

lib/widgets/delegate.dart

@@ -22,7 +22,7 @@ class EditorTextSelectionGestureDetectorBuilder {
   bool shouldShowSelectionToolbar = true;
 
   EditorTextSelectionGestureDetectorBuilder(this.delegate)
-      : assert(delegate != null);
+      ;
 
   EditorState? getEditor() {
     return delegate.getEditableTextKey().currentState;

lib/widgets/editor.dart

@@ -182,13 +182,7 @@ class QuillEditor extends StatefulWidget {
       this.onLaunchUrl,
       this.embedBuilder =
           kIsWeb ? _defaultEmbedBuilderWeb : _defaultEmbedBuilder})
-      : assert(controller != null),
-        assert(scrollController != null),
-        assert(scrollable != null),
-        assert(focusNode != null),
-        assert(autoFocus != null),
-        assert(readOnly != null),
-        assert(embedBuilder != null);
+      ;
 
   factory QuillEditor.basic(
       {required QuillController controller, required bool readOnly}) {
@@ -559,10 +553,7 @@ class RenderEditor extends RenderEditableContainerBox
       this._startHandleLayerLink,
       this._endHandleLayerLink,
       EdgeInsets floatingCursorAddedMargin)
-      : assert(document != null),
-        assert(textDirection != null),
-        assert(_hasFocus != null),
-        assert(floatingCursorAddedMargin != null),
+      : 
         super(
           children,
           document.root,
@@ -571,7 +562,6 @@ class RenderEditor extends RenderEditableContainerBox
         );
 
   setDocument(Document doc) {
-    assert(doc != null);
     if (document == doc) {
       return;
     }
@@ -580,7 +570,6 @@ class RenderEditor extends RenderEditableContainerBox
   }
 
   setHasFocus(bool h) {
-    assert(h != null);
     if (_hasFocus == h) {
       return;
     }
@@ -615,7 +604,6 @@ class RenderEditor extends RenderEditableContainerBox
   @override
   List<TextSelectionPoint> getEndpointsForSelection(
       TextSelection textSelection) {
-    assert(constraints != null);
 
     if (textSelection.isCollapsed) {
       RenderEditableBox child = childAtPosition(textSelection.extent);
@@ -686,11 +674,6 @@ class RenderEditor extends RenderEditableContainerBox
     Offset? to,
     SelectionChangedCause cause,
   ) {
-    assert(cause != null);
-    assert(from != null);
-    if (onSelectionChanged == null) {
-      return;
-    }
     TextPosition firstPosition = getPositionForOffset(from);
     TextSelection firstWord = selectWordAtPosition(firstPosition);
     TextSelection lastWord =
@@ -718,18 +701,12 @@ class RenderEditor extends RenderEditableContainerBox
         !focusingEmpty) {
       return;
     }
-    if (onSelectionChanged != null) {
       onSelectionChanged(nextSelection, cause);
   }
-  }
 
   @override
   selectWordEdge(SelectionChangedCause cause) {
-    assert(cause != null);
     assert(_lastTapDownPosition != null);
-    if (onSelectionChanged == null) {
-      return;
-    }
     TextPosition position = getPositionForOffset(_lastTapDownPosition!);
     RenderEditableBox child = childAtPosition(position);
     int nodeOffset = child.getContainer().getOffset();
@@ -763,11 +740,6 @@ class RenderEditor extends RenderEditableContainerBox
     Offset? to,
     SelectionChangedCause cause,
   ) {
-    assert(cause != null);
-    assert(from != null);
-    if (onSelectionChanged == null) {
-      return;
-    }
     TextPosition fromPosition = getPositionForOffset(from);
     TextPosition? toPosition = to == null ? null : getPositionForOffset(to);
 
@@ -932,9 +904,7 @@ class RenderEditableContainerBox extends RenderBox
 
   RenderEditableContainerBox(List<RenderEditableBox>? children, this._container,
       this.textDirection, this._padding)
-      : assert(_container != null),
-        assert(textDirection != null),
-        assert(_padding != null),
+      :
         assert(_padding.isNonNegative) {
     addAll(children);
   }
@@ -944,7 +914,6 @@ class RenderEditableContainerBox extends RenderBox
   }
 
   setContainer(containerNode.Container c) {
-    assert(c != null);
     if (_container == c) {
       return;
     }
@@ -955,7 +924,6 @@ class RenderEditableContainerBox extends RenderBox
   EdgeInsetsGeometry getPadding() => _padding;
 
   setPadding(EdgeInsetsGeometry value) {
-    assert(value != null);
     assert(value.isNonNegative);
     if (_padding == value) {
       return;

lib/widgets/keyboard_listener.dart

@@ -59,9 +59,7 @@ class KeyboardListener {
   };
 
   KeyboardListener(this.onCursorMove, this.onShortcut, this.onDelete)
-      : assert(onCursorMove != null),
-        assert(onShortcut != null),
-        assert(onDelete != null);
+      ;
 
   bool handleRawKeyEvent(RawKeyEvent event) {
     if (event is! RawKeyDownEvent) {

lib/widgets/raw_editor.dart

@@ -907,7 +907,6 @@ class RawEditorState extends EditorState
       _selectionOverlay?.hide();
       _selectionOverlay = null;
 
-      if (widget.selectionCtrls != null) {
         _selectionOverlay = EditorTextSelectionOverlay(
             textEditingValue,
             false,
@@ -926,7 +925,6 @@ class RawEditorState extends EditorState
         _selectionOverlay!.showHandles();
     }
   }
-  }
 
   _handleFocusChanged() {
     openOrCloseConnection();

lib/widgets/text_block.dart

@@ -74,9 +74,7 @@ class EditableTextBlock extends StatelessWidget {
       this.embedBuilder,
       this.cursorCont,
       this.indentLevelCounts)
-      : assert(hasFocus != null),
-        assert(embedBuilder != null),
-        assert(cursorCont != null);
+      ;
 
   @override
   Widget build(BuildContext context) {
@@ -263,11 +261,7 @@ class RenderEditableTextBlock extends RenderEditableContainerBox
     required Decoration decoration,
     ImageConfiguration configuration = ImageConfiguration.empty,
     EdgeInsets contentPadding = EdgeInsets.zero,
-  })  : assert(block != null),
-        assert(textDirection != null),
-        assert(decoration != null),
-        assert(padding != null),
-        assert(contentPadding != null),
+  })  : 
         _decoration = decoration,
         _configuration = configuration,
         _savedPadding = padding,
@@ -283,7 +277,6 @@ class RenderEditableTextBlock extends RenderEditableContainerBox
   EdgeInsets _contentPadding;
 
   set contentPadding(EdgeInsets value) {
-    assert(value != null);
     if (_contentPadding == value) return;
     _contentPadding = value;
     super.setPadding(_savedPadding.add(_contentPadding));
@@ -301,7 +294,6 @@ class RenderEditableTextBlock extends RenderEditableContainerBox
   Decoration _decoration;
 
   set decoration(Decoration value) {
-    assert(value != null);
     if (value == _decoration) return;
     _painter?.dispose();
     _painter = null;
@@ -313,7 +305,6 @@ class RenderEditableTextBlock extends RenderEditableContainerBox
   ImageConfiguration _configuration;
 
   set configuration(ImageConfiguration value) {
-    assert(value != null);
     if (value == _configuration) return;
     _configuration = value;
     markNeedsPaint();
@@ -495,8 +486,6 @@ class RenderEditableTextBlock extends RenderEditableContainerBox
   }
 
   _paintDecoration(PaintingContext context, Offset offset) {
-    assert(size.width != null);
-    assert(size.height != null);
     _painter ??= _decoration.createBoxPainter(markNeedsPaint);
 
     EdgeInsets decorationPadding = resolvedPadding! - _contentPadding;
@@ -531,11 +520,7 @@ class _EditableBlock extends MultiChildRenderObjectWidget {
 
   _EditableBlock(this.block, this.textDirection, this.padding, this.decoration,
       this.contentPadding, List<Widget> children)
-      : assert(block != null),
-        assert(textDirection != null),
-        assert(padding != null),
-        assert(decoration != null),
-        assert(children != null),
+      :
         super(children: children);
 
   EdgeInsets get _padding =>

lib/widgets/text_selection.dart

@@ -55,13 +55,9 @@ class EditorTextSelectionOverlay {
       this.dragStartBehavior,
       this.onSelectionHandleTapped,
       this.clipboardStatus)
-      : assert(value != null),
-        assert(context != null),
-        assert(handlesVisible != null) {
+      {
     OverlayState overlay = Overlay.of(context, rootOverlay: true)!;
-    assert(
-      overlay != null,
-    );
+    
     _toolbarController = AnimationController(
         duration: Duration(milliseconds: 150), vsync: overlay);
   }
@@ -71,7 +67,6 @@ class EditorTextSelectionOverlay {
   Animation<double> get _toolbarOpacity => _toolbarController.view;
 
   setHandlesVisible(bool visible) {
-    assert(visible != null);
     if (handlesVisible == visible) {
       return;
     }
@@ -111,8 +106,8 @@ class EditorTextSelectionOverlay {
   Widget _buildHandle(
       BuildContext context, _TextSelectionHandlePosition position) {
     if ((_selection.isCollapsed &&
-            position == _TextSelectionHandlePosition.END) ||
-        selectionCtrls == null) {
+            position == _TextSelectionHandlePosition.END)
+        ) {
       return Container();
     }
     return Visibility(
@@ -167,9 +162,7 @@ class EditorTextSelectionOverlay {
   }
 
   Widget _buildToolbar(BuildContext context) {
-    if (selectionCtrls == null) {
-      return Container();
-    }
+    
 
     List<TextSelectionPoint> endpoints =
         renderObject!.getEndpointsForSelection(_selection);
@@ -289,7 +282,6 @@ class _TextSelectionHandleOverlay extends StatefulWidget {
       case _TextSelectionHandlePosition.END:
         return renderObject!.selectionEndInViewport;
     }
-    return null;
   }
 }
 
@@ -468,14 +460,12 @@ class _TextSelectionHandleOverlayState
   ) {
     if (widget.selection.isCollapsed) return TextSelectionHandleType.collapsed;
 
-    assert(textDirection != null);
     switch (textDirection) {
       case TextDirection.ltr:
         return ltrType;
       case TextDirection.rtl:
         return rtlType;
     }
-    return null;
   }
 }
 
@@ -496,7 +486,7 @@ class EditorTextSelectionGestureDetector extends StatefulWidget {
     this.onDragSelectionEnd,
     this.behavior,
     required this.child,
-  })   : assert(child != null),
+  })   : 
         super(key: key);
 
   final GestureTapDownCallback? onTapDown;
@@ -660,7 +650,6 @@ class _EditorTextSelectionGestureDetectorState
   }
 
   bool _isWithinDoubleTapTolerance(Offset secondTapOffset) {
-    assert(secondTapOffset != null);
     if (_lastTapOffset == null) {
       return false;
     }

lib/widgets/toolbar.dart

@@ -186,11 +186,7 @@ class ToggleStyleButton extends StatefulWidget {
     required this.icon,
     required this.controller,
     this.childBuilder = defaultToggleStyleButtonBuilder,
-  })  : assert(attribute.value != null),
-        assert(icon != null),
-        assert(controller != null),
-        assert(childBuilder != null),
-        super(key: key);
+  })  :         super(key: key);
 
   @override
   _ToggleStyleButtonState createState() => _ToggleStyleButtonState();
@@ -274,9 +270,7 @@ class ToggleCheckListButton extends StatefulWidget {
     required this.controller,
     this.childBuilder = defaultToggleStyleButtonBuilder,
     required this.attribute,
-  })  : assert(icon != null),
-        assert(controller != null),
-        assert(childBuilder != null),
+  })  : 
         super(key: key);
 
   @override
@@ -502,8 +496,7 @@ class ImageButton extends StatefulWidget {
       required this.controller,
       required this.imageSource,
       this.onImagePickCallback})
-      : assert(icon != null),
-        assert(controller != null),
+      : 
         super(key: key);
 
   @override
@@ -522,7 +515,6 @@ class _ImageButtonState extends State<ImageButton> {
 
     final File file = File(pickedFile.path);
 
-    if (file == null || widget.onImagePickCallback == null) return null;
     // We simply return the absolute path to selected file.
     try {
       String url = await widget.onImagePickCallback!(file);
@@ -554,7 +546,6 @@ class _ImageButtonState extends State<ImageButton> {
 
     if (_paths != null) {
       File file = File(_fileName);
-      if (file == null || widget.onImagePickCallback == null) return null;
       // We simply return the absolute path to selected file.
       try {
         String url = await widget.onImagePickCallback!(file);
@@ -611,9 +602,7 @@ class ColorButton extends StatefulWidget {
       required this.icon,
       required this.controller,
       required this.background})
-      : assert(icon != null),
-        assert(controller != null),
-        assert(background != null),
+      : 
         super(key: key);
 
   @override
@@ -752,9 +741,7 @@ class HistoryButton extends StatefulWidget {
       required this.icon,
       required this.controller,
       required this.undo})
-      : assert(icon != null),
-        assert(controller != null),
-        assert(undo != null),
+      : 
         super(key: key);
 
   @override
@@ -827,9 +814,7 @@ class IndentButton extends StatefulWidget {
       required this.icon,
       required this.controller,
       required this.isIncrease})
-      : assert(icon != null),
-        assert(controller != null),
-        assert(isIncrease != null),
+      : 
         super(key: key);
 
   @override
@@ -881,8 +866,7 @@ class ClearFormatButton extends StatefulWidget {
   final QuillController controller;
 
   ClearFormatButton({Key? key, required this.icon, required this.controller})
-      : assert(icon != null),
-        assert(controller != null),
+      :
         super(key: key);
 
   @override
@@ -1265,9 +1249,6 @@ class _QuillDropdownButtonState<T> extends State<QuillDropdownButton<T>> {
         // if (widget.onCanceled != null) widget.onCanceled();
         return null;
       }
-      if (widget.onSelected != null) {
-        widget.onSelected(newValue);
-      }
     });
   }