Support hr embed

app/assets/sample_data.json

@@ -9,7 +9,13 @@
       "insert":"\n"
    },
    {
-      "insert":"Rich text editor for Flutter"
+      "insert":{
+         "_type":"hr",
+         "_inline":false
+      }
+   },
+   {
+      "insert":"\nRich text editor for Flutter"
    },
    {
       "attributes":{

app/lib/pages/home_page.dart

@@ -1,5 +1,4 @@
 import 'dart:convert';
-import 'dart:io';
 
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
@@ -21,9 +20,6 @@ class _HomePageState extends State<HomePage> {
   @override
   void initState() {
     super.initState();
-
-    print(Directory.current.path); // /
-
     _loadFromAssets();
   }
 
@@ -91,17 +87,19 @@ class _HomePageState extends State<HomePage> {
   }
 
   Widget _embedBuilder(BuildContext context, leaf.Embed node) {
-    if (node.value.type == 'hr') {
-      final style = QuillStyles.getStyles(context, true);
-      return Divider(
-        height: style.paragraph.style.fontSize * style.paragraph.style.height,
-        thickness: 2,
-        color: Colors.grey.shade200,
-      );
+    switch (node.value.type) {
+      case 'hr':
+        final style = QuillStyles.getStyles(context, true);
+        return Divider(
+          height: style.paragraph.style.fontSize * style.paragraph.style.height,
+          thickness: 2,
+          color: Colors.grey.shade200,
+        );
+      default:
+        throw UnimplementedError(
+            'Embeddable type "${node.value.type}" is not supported by default embed '
+            'builder of QuillEditor. You must pass your own builder function to '
+            'embedBuilder property of QuillEditor or QuillField widgets.');
     }
-    throw UnimplementedError(
-        'Embeddable type "${node.value.type}" is not supported by default embed '
-        'builder of QuillEditor. You must pass your own builder function to '
-        'embedBuilder property of QuillEditor or QuillField widgets.');
   }
 }

lib/models/documents/attribute.dart

@@ -54,7 +54,9 @@ class Attribute<T> {
     Attribute.italic.key,
     Attribute.underline.key,
     Attribute.strikeThrough.key,
-    Attribute.link.key
+    Attribute.link.key,
+    Attribute.color.key,
+    Attribute.background.key
   };
 
   static final Set<String> blockKeys = {
@@ -84,8 +86,7 @@ class Attribute<T> {
 
   bool get isInline => scope == AttributeScope.INLINE;
 
-  bool get isBlockExceptHeader =>
-      scope == AttributeScope.BLOCK && key != Attribute.header.key;
+  bool get isBlockExceptHeader => blockKeysExceptHeader.contains(key);
 
   Map<String, dynamic> toJson() => <String, dynamic>{key: value};