Move internal method from Html to document instead of the controller

lib/src/models/documents/document.dart

@@ -1,5 +1,10 @@
 import 'dart:async' show StreamController;
 
+import 'package:html2md/html2md.dart' as html2md;
+import 'package:markdown/markdown.dart' as md;
+
+import '../../../markdown_quill.dart';
+
 import '../../../quill_delta.dart';
 import '../../widgets/quill/embeds.dart';
 import '../rules/rule.dart';
@@ -442,6 +447,40 @@ class Document {
         delta.first.data == '\n' &&
         delta.first.key == 'insert';
   }
+
+  /// Convert the HTML Raw string to [Delta]
+  ///
+  /// It will run using the following steps:
+  ///
+  /// 1. Convert the html to markdown string using `html2md` package
+  /// 2. Convert the markdown string to quill delta json string
+  /// 3. Decode the delta json string to [Delta]
+  ///
+  /// for more [info](https://github.com/singerdmx/flutter-quill/issues/1100)
+  static Delta fromHtml(String html) {
+    final markdown = html2md
+        .convert(
+          html,
+        )
+        .replaceAll('unsafe:', '');
+
+    final mdDocument = md.Document(encodeHtml: false);
+
+    final mdToDelta = MarkdownToDelta(markdownDocument: mdDocument);
+
+    return mdToDelta.convert(markdown);
+
+    // final deltaJsonString = markdownToDelta(markdown);
+    // final deltaJson = jsonDecode(deltaJsonString);
+    // if (deltaJson is! List) {
+    //   throw ArgumentError(
+    //     'The delta json string should be of type list when jsonDecode() it',
+    //   );
+    // }
+    // return Delta.fromJson(
+    //   deltaJson,
+    // );
+  }
 }
 
 /// Source of a [Change].

lib/src/widgets/quill/quill_controller.dart

@@ -2,11 +2,8 @@ import 'dart:math' as math;
 
 import 'package:flutter/services.dart' show ClipboardData, Clipboard;
 import 'package:flutter/widgets.dart';
-import 'package:html2md/html2md.dart' as html2md;
-import 'package:markdown/markdown.dart' as md;
 import 'package:meta/meta.dart';
 
-import '../../../markdown_quill.dart';
 import '../../../quill_delta.dart';
 import '../../models/documents/attribute.dart';
 import '../../models/documents/document.dart';
@@ -508,38 +505,4 @@ class QuillController extends ChangeNotifier {
 
   // Notify toolbar buttons directly with attributes
   Map<String, Attribute> toolbarButtonToggler = const {};
-
-  /// Convert the HTML Raw string to [Delta]
-  ///
-  /// It will run using the following steps:
-  ///
-  /// 1. Convert the html to markdown string using `html2md` package
-  /// 2. Convert the markdown string to quill delta json string
-  /// 3. Decode the delta json string to [Delta]
-  ///
-  /// for more [info](https://github.com/singerdmx/flutter-quill/issues/1100)
-  static Delta fromHtml(String html) {
-    final markdown = html2md
-        .convert(
-          html,
-        )
-        .replaceAll('unsafe:', '');
-
-    final mdDocument = md.Document(encodeHtml: false);
-
-    final mdToDelta = MarkdownToDelta(markdownDocument: mdDocument);
-
-    return mdToDelta.convert(markdown);
-
-    // final deltaJsonString = markdownToDelta(markdown);
-    // final deltaJson = jsonDecode(deltaJsonString);
-    // if (deltaJson is! List) {
-    //   throw ArgumentError(
-    //     'The delta json string should be of type list when jsonDecode() it',
-    //   );
-    // }
-    // return Delta.fromJson(
-    //   deltaJson,
-    // );
-  }
 }

lib/src/widgets/raw_editor/raw_editor_state.dart

@@ -213,7 +213,7 @@ class QuillRawEditorState extends EditorState
       if (html == null) {
         return;
       }
-      final deltaFromCliboard = QuillController.fromHtml(html);
+      final deltaFromCliboard = Document.fromHtml(html);
       final delta = deltaFromCliboard.compose(controller.document.toDelta());
 
       controller