Make getRenderEditor() not nullable

lib/src/widgets/editor.dart

@@ -51,7 +51,7 @@ abstract class EditorState extends State<RawEditor>
     implements TextSelectionDelegate {
   ScrollController get scrollController;
 
-  RenderEditor? getRenderEditor();
+  RenderEditor getRenderEditor();
 
   EditorTextSelectionOverlay? getSelectionOverlay();
 

lib/src/widgets/raw_editor.dart

@@ -749,11 +749,11 @@ class RawEditorState extends EditorState
       if (widget.scrollable || _scrollController.hasClients) {
         _showCaretOnScreenScheduled = false;
 
-        final renderEditor = getRenderEditor();
-        if (renderEditor == null) {
+        if (!mounted) {
           return;
         }
 
+        final renderEditor = getRenderEditor();
         final viewport = RenderAbstractViewport.of(renderEditor);
         final editorOffset =
             renderEditor.localToGlobal(const Offset(0, 0), ancestor: viewport);
@@ -777,8 +777,8 @@ class RawEditorState extends EditorState
   }
 
   @override
-  RenderEditor? getRenderEditor() {
-    return _editorKey.currentContext?.findRenderObject() as RenderEditor?;
+  RenderEditor getRenderEditor() {
+    return _editorKey.currentContext?.findRenderObject() as RenderEditor;
   }
 
   @override
@@ -806,7 +806,7 @@ class RawEditorState extends EditorState
 
   @override
   void debugAssertLayoutUpToDate() {
-    getRenderEditor()!.debugAssertLayoutUpToDate();
+    getRenderEditor().debugAssertLayoutUpToDate();
   }
 
   /// Shows the selection toolbar at the location of the current cursor.
@@ -903,7 +903,7 @@ class RawEditorState extends EditorState
   bool get readOnly => widget.readOnly;
 
   @override
-  TextLayoutMetrics get textLayoutMetrics => getRenderEditor()!;
+  TextLayoutMetrics get textLayoutMetrics => getRenderEditor();
 
   @override
   AnimationController get floatingCursorResetController =>

lib/src/widgets/raw_editor/raw_editor_state_selection_delegate_mixin.dart

@@ -45,11 +45,11 @@ mixin RawEditorStateSelectionDelegateMixin on EditorState
 
   @override
   void bringIntoView(TextPosition position) {
-    final localRect = getRenderEditor()!.getLocalRectForCaret(position);
+    final localRect = getRenderEditor().getLocalRectForCaret(position);
     final targetOffset = _getOffsetToRevealCaret(localRect, position);
 
     scrollController.jumpTo(targetOffset.offset);
-    getRenderEditor()!.showOnScreen(rect: targetOffset.rect);
+    getRenderEditor().showOnScreen(rect: targetOffset.rect);
   }
 
   // Finds the closest scroll offset to the current scroll offset that fully
@@ -66,7 +66,7 @@ mixin RawEditorStateSelectionDelegateMixin on EditorState
       return RevealedOffset(offset: scrollController.offset, rect: rect);
     }
 
-    final editableSize = getRenderEditor()!.size;
+    final editableSize = getRenderEditor().size;
     final double additionalOffset;
     final Offset unitOffset;
 
@@ -77,7 +77,7 @@ mixin RawEditorStateSelectionDelegateMixin on EditorState
       center: rect.center,
       width: rect.width,
       height: math.max(
-          rect.height, getRenderEditor()!.preferredLineHeight(position)),
+          rect.height, getRenderEditor().preferredLineHeight(position)),
     );
 
     additionalOffset = expandedRect.height >= editableSize.height

lib/src/widgets/raw_editor/raw_editor_state_text_input_client_mixin.dart

@@ -187,7 +187,7 @@ mixin RawEditorStateTextInputClientMixin on EditorState
   // origin, but the touch origin is used to determine which line the cursor is
   // on, we need this offset to correctly render and move the cursor.
   Offset _floatingCursorOffset(TextPosition textPosition) =>
-      Offset(0, getRenderEditor()!.preferredLineHeight(textPosition) / 2);
+      Offset(0, getRenderEditor().preferredLineHeight(textPosition) / 2);
 
   @override
   void updateFloatingCursor(RawFloatingCursorPoint point) {
@@ -202,14 +202,14 @@ mixin RawEditorStateTextInputClientMixin on EditorState
         _pointOffsetOrigin = point.offset;
 
         final currentTextPosition =
-            TextPosition(offset: getRenderEditor()!.selection.baseOffset);
+            TextPosition(offset: getRenderEditor().selection.baseOffset);
         _startCaretRect =
-            getRenderEditor()!.getLocalRectForCaret(currentTextPosition);
+            getRenderEditor().getLocalRectForCaret(currentTextPosition);
 
         _lastBoundedOffset = _startCaretRect!.center -
             _floatingCursorOffset(currentTextPosition);
         _lastTextPosition = currentTextPosition;
-        getRenderEditor()!.setFloatingCursor(
+        getRenderEditor().setFloatingCursor(
             point.state, _lastBoundedOffset!, _lastTextPosition!);
         break;
       case FloatingCursorDragState.Update:
@@ -220,23 +220,23 @@ mixin RawEditorStateTextInputClientMixin on EditorState
             _startCaretRect!.center + centeredPoint - floatingCursorOffset;
 
         final preferredLineHeight =
-            getRenderEditor()!.preferredLineHeight(_lastTextPosition!);
+            getRenderEditor().preferredLineHeight(_lastTextPosition!);
         _lastBoundedOffset =
-            getRenderEditor()!.calculateBoundedFloatingCursorOffset(
+            getRenderEditor().calculateBoundedFloatingCursorOffset(
           rawCursorOffset,
           preferredLineHeight,
         );
-        _lastTextPosition = getRenderEditor()!.getPositionForOffset(
-            getRenderEditor()!
+        _lastTextPosition = getRenderEditor().getPositionForOffset(
+            getRenderEditor()
                 .localToGlobal(_lastBoundedOffset! + floatingCursorOffset));
-        getRenderEditor()!.setFloatingCursor(
+        getRenderEditor().setFloatingCursor(
             point.state, _lastBoundedOffset!, _lastTextPosition!);
         final newSelection = TextSelection.collapsed(
             offset: _lastTextPosition!.offset,
             affinity: _lastTextPosition!.affinity);
         // Setting selection as floating cursor moves will have scroll view
         // bring background cursor into view
-        getRenderEditor()!
+        getRenderEditor()
             .onSelectionChanged(newSelection, SelectionChangedCause.forcePress);
         break;
       case FloatingCursorDragState.End:
@@ -259,10 +259,10 @@ mixin RawEditorStateTextInputClientMixin on EditorState
   /// and current position of background cursor)
   void onFloatingCursorResetTick() {
     final finalPosition =
-        getRenderEditor()!.getLocalRectForCaret(_lastTextPosition!).centerLeft -
+        getRenderEditor().getLocalRectForCaret(_lastTextPosition!).centerLeft -
             _floatingCursorOffset(_lastTextPosition!);
     if (floatingCursorResetController.isCompleted) {
-      getRenderEditor()!.setFloatingCursor(
+      getRenderEditor().setFloatingCursor(
           FloatingCursorDragState.End, finalPosition, _lastTextPosition!);
       _startCaretRect = null;
       _lastTextPosition = null;
@@ -275,7 +275,7 @@ mixin RawEditorStateTextInputClientMixin on EditorState
       final lerpY =
           lerpDouble(_lastBoundedOffset!.dy, finalPosition.dy, lerpValue)!;
 
-      getRenderEditor()!.setFloatingCursor(FloatingCursorDragState.Update,
+      getRenderEditor().setFloatingCursor(FloatingCursorDragState.Update,
           Offset(lerpX, lerpY), _lastTextPosition!,
           resetLerpValue: lerpValue);
     }