Hide text selection rect when editor unfocused

Fixes #298

packages/fleather/lib/src/rendering/editable_text_line.dart

@@ -110,7 +110,7 @@ class RenderEditableTextLine extends RenderEditableBox {
   /// manipulation. It's the responsibility of this object's owner
   /// to provide selection manipulation affordances.
   ///
-  /// This field is used by [selectionEnabled] (which then controls
+  /// This field is used by [_shouldPaintSelection] (which then controls
   /// the accessibility hints mentioned above).
   bool get enableInteractiveSelection => _enableInteractiveSelection;
   bool _enableInteractiveSelection;
@@ -122,17 +122,13 @@ class RenderEditableTextLine extends RenderEditableBox {
     markNeedsSemanticsUpdate(); // TODO: should probably update semantics on the RenderEditor instead.
   }
 
-  /// Whether interactive selection are enabled based on the value of
-  /// [enableInteractiveSelection].
+  /// Whether selection should be painted based on the value of
+  /// [enableInteractiveSelection] and [hasFocus].
   ///
   /// If [enableInteractiveSelection] is not set then defaults to `true`.
-  bool get selectionEnabled {
-    return enableInteractiveSelection;
-  }
+  bool get _shouldPaintSelection => enableInteractiveSelection && hasFocus;
 
-  bool get containsSelection {
-    return intersectsWithSelection(node, _selection);
-  }
+  bool get containsSelection => intersectsWithSelection(node, _selection);
 
   // End selection implementation
 
@@ -708,7 +704,7 @@ class RenderEditableTextLine extends RenderEditableBox {
         _paintTextBackground(context, item, effectiveOffset);
       }
 
-      if (selectionEnabled && containsSelection) {
+      if (_shouldPaintSelection && containsSelection) {
         final local = localSelection(node, selection);
         _selectionRects ??= body!.getBoxesForSelection(local);
         _paintSelection(context, effectiveOffset);

packages/fleather/lib/src/widgets/editor.dart

@@ -1464,9 +1464,6 @@ class RawEditorState extends EditorState
       // Place cursor at the end if the selection is invalid when we receive focus.
 //        _handleSelectionChanged(TextSelection.collapsed(offset: _value.text.length), renderEditable, null);
 //      }
-      setState(() {
-        // Inform the widget that the value of focus has changed. (so that cursor can repaint appropriately)
-      });
     } else {
       WidgetsBinding.instance.removeObserver(this);
       // TODO: teach editor about state of the toolbar and whether the user is in the middle of applying styles.
@@ -1478,6 +1475,9 @@ class RawEditorState extends EditorState
       //     source: ChangeSource.local);
 //      _currentPromptRectRange = null;
     }
+    setState(() {
+      // Inform the widget that the value of focus has changed. (so that cursor can repaint appropriately)
+    });
     updateKeepAlive();
   }