Fix header toggle button and new block attribute support.

lib/src/models/documents/nodes/line.dart

@@ -519,6 +519,7 @@ base class Line extends QuillContainer<Leaf?> {
   int _getNodeText(Leaf node, StringBuffer buffer, int offset, int remaining) {
     final text = node.toPlainText();
     if (text == Embed.kObjectReplacementCharacter) {
+      buffer.write(Embed.kObjectReplacementCharacter);
       return remaining - node.length;
     }
 

lib/src/models/rules/insert.dart

@@ -565,8 +565,8 @@ class PreserveInlineStylesRule extends InsertRule {
 
     if ((prev.data as String).endsWith('\n')) {
       if (prev.attributes != null) {
-        for (final key in prev.attributes!.keys) {
-          if (Attribute.blockKeys.contains(key)) {
+        for (final value in prev.attributes!.values) {
+          if (!(value as Attribute).isInline) {
             return null;
           }
         }

lib/src/widgets/toolbar/base_button/base_value_button.dart

@@ -32,6 +32,13 @@ abstract class QuillToolbarCommonButtonState<
   String get tooltip =>
       options.tooltip ?? baseButtonExtraOptions?.tooltip ?? defaultTooltip;
 
+  IconData get defaultIconData;
+
+  IconData get iconData =>
+      options.iconData ??
+      context.quillToolbarBaseButtonOptions?.iconData ??
+      defaultIconData;
+
   double get iconSize =>
       options.iconSize ?? baseButtonExtraOptions?.iconSize ?? kDefaultIconSize;
 

lib/src/widgets/toolbar/buttons/clipboard_button.dart

@@ -91,7 +91,8 @@ class QuillToolbarClipboardButtonState
         ClipboardAction.paste => context.loc.paste,
       };
 
-  IconData get _icon => switch (widget.clipboardAction) {
+  @override
+  IconData get defaultIconData => switch (widget.clipboardAction) {
         ClipboardAction.cut => Icons.cut_outlined,
         ClipboardAction.copy => Icons.copy_outlined,
         ClipboardAction.paste => Icons.paste_outlined,
@@ -132,7 +133,7 @@ class QuillToolbarClipboardButtonState
         message: tooltip,
         child: QuillToolbarIconButton(
           icon: Icon(
-            _icon,
+            iconData,
             size: iconSize * iconButtonFactor,
           ),
           isSelected: false,

lib/src/widgets/toolbar/buttons/color/color_button.dart

@@ -103,11 +103,9 @@ class QuillToolbarColorButtonState extends QuillToolbarColorBaseButtonState {
     super.dispose();
   }
 
-  IconData get iconData {
-    return options.iconData ??
-        baseButtonExtraOptions?.iconData ??
-        (widget.isBackground ? Icons.format_color_fill : Icons.color_lens);
-  }
+  @override
+  IconData get defaultIconData =>
+      widget.isBackground ? Icons.format_color_fill : Icons.color_lens;
 
   @override
   Widget build(BuildContext context) {

lib/src/widgets/toolbar/buttons/font_family_button.dart

@@ -79,6 +79,9 @@ class QuillToolbarFontFamilyButtonState extends QuillToolbarBaseButtonState<
   @override
   String get defaultTooltip => context.loc.fontFamily;
 
+  @override
+  IconData get defaultIconData => Icons.font_download_outlined;
+
   void _onPressed() {
     if (_menuController.isOpen) {
       _menuController.close();

lib/src/widgets/toolbar/buttons/font_size_button.dart

@@ -85,6 +85,9 @@ class QuillToolbarFontSizeButtonState extends QuillToolbarBaseButtonState<
   @override
   String get defaultTooltip => context.loc.fontSize;
 
+  @override
+  IconData get defaultIconData => Icons.format_size_outlined;
+
   void _onDropdownButtonPressed() {
     if (_menuController.isOpen) {
       _menuController.close();

lib/src/widgets/toolbar/buttons/hearder_style/select_header_style_buttons.dart

@@ -39,6 +39,9 @@ class QuillToolbarSelectHeaderStyleButtonsState
   @override
   String get defaultTooltip => context.loc.headerStyle;
 
+  @override
+  IconData get defaultIconData => Icons.question_mark_outlined;
+
   Style get _selectionStyle => controller.getSelectionStyle();
 
   final _valueToText = <Attribute, String>{

lib/src/widgets/toolbar/buttons/hearder_style/select_header_style_dropdown_button.dart

@@ -35,6 +35,9 @@ class _QuillToolbarSelectHeaderStyleDropdownButtonState
   @override
   String get defaultTooltip => context.loc.headerStyle;
 
+  @override
+  IconData get defaultIconData => Icons.question_mark_outlined;
+
   Attribute<dynamic> _selectedItem = Attribute.header;
 
   final _menuController = MenuController();

lib/src/widgets/toolbar/buttons/history_button.dart

@@ -36,6 +36,10 @@ class QuillToolbarHistoryButtonState
   String get defaultTooltip =>
       widget.isUndo ? context.loc.undo : context.loc.redo;
 
+  @override
+  IconData get defaultIconData =>
+      (widget.isUndo ? Icons.undo_outlined : Icons.redo_outlined);
+
   @override
   void initState() {
     super.initState();
@@ -53,9 +57,6 @@ class QuillToolbarHistoryButtonState
 
   @override
   Widget build(BuildContext context) {
-    final iconData = options.iconData ??
-        baseButtonExtraOptions?.iconData ??
-        (widget.isUndo ? Icons.undo_outlined : Icons.redo_outlined);
     final childBuilder =
         options.childBuilder ?? baseButtonExtraOptions?.childBuilder;
 

lib/src/widgets/toolbar/buttons/indent_button.dart

@@ -33,13 +33,10 @@ class QuillToolbarIndentButtonState extends QuillToolbarIndentBaseButtonState {
       ? context.loc.increaseIndent
       : context.loc.decreaseIndent;
 
-  IconData get iconData {
-    return options.iconData ??
-        baseButtonExtraOptions?.iconData ??
-        (widget.isIncrease
+  @override
+  IconData get defaultIconData => widget.isIncrease
       ? Icons.format_indent_increase
-            : Icons.format_indent_decrease);
-  }
+      : Icons.format_indent_decrease;
 
   void _sharedOnPressed() {
     widget.controller.indentSelection(widget.isIncrease);

lib/src/widgets/toolbar/buttons/link_style_button.dart

@@ -62,9 +62,8 @@ class QuillToolbarLinkStyleButtonState
     controller.removeListener(_didChangeSelection);
   }
 
-  IconData get iconData {
-    return options.iconData ?? baseButtonExtraOptions?.iconData ?? Icons.link;
-  }
+  @override
+  IconData get defaultIconData => Icons.link;
 
   Color get dialogBarrierColor {
     return options.dialogBarrierColor ??

lib/src/widgets/toolbar/buttons/toggle_check_list_button.dart

@@ -52,11 +52,8 @@ class QuillToolbarToggleCheckListButtonState
   @override
   String get defaultTooltip => context.loc.checkedList;
 
-  IconData get iconData {
-    return options.iconData ??
-        baseButtonExtraOptions?.iconData ??
-        Icons.check_box;
-  }
+  @override
+  IconData get defaultIconData => Icons.check_box;
 
   @override
   Widget build(BuildContext context) {

lib/src/widgets/toolbar/buttons/toggle_style_button.dart

@@ -96,11 +96,8 @@ class QuillToolbarToggleStyleButtonState
   @override
   String get defaultTooltip => _defaultTooltipAndIconData.$1;
 
-  IconData get iconData {
-    return options.iconData ??
-        context.quillToolbarBaseButtonOptions?.iconData ??
-        _defaultTooltipAndIconData.$2;
-  }
+  @override
+  IconData get defaultIconData => _defaultTooltipAndIconData.$2;
 
   void _onPressed() {
     _toggleAttribute();
@@ -140,6 +137,7 @@ class QuillToolbarToggleStyleButtonState
 
   bool _getIsToggled(Map<String, Attribute> attrs) {
     if (widget.attribute.key == Attribute.list.key ||
+        widget.attribute.key == Attribute.header.key ||
         widget.attribute.key == Attribute.script.key ||
         widget.attribute.key == Attribute.align.key) {
       final attribute = attrs[widget.attribute.key];