From 2f8f529e7219f704728cba97d0a98d8cb47054ad Mon Sep 17 00:00:00 2001
From: agu <wu_zhengu@qq.com>
Date: Sat, 16 Dec 2023 23:22:23 +0800
Subject: [PATCH] Amend DeltaX.fromHtml to retain the attributes

---
 lib/src/models/documents/document.dart        | 40 +++++++++++++++++--
 .../quill_markdown/markdown_to_delta.dart     |  2 +-
 2 files changed, 38 insertions(+), 4 deletions(-)

diff --git a/lib/src/models/documents/document.dart b/lib/src/models/documents/document.dart
index 42fbe227..5886ddb3 100644
--- a/lib/src/models/documents/document.dart
+++ b/lib/src/models/documents/document.dart
@@ -445,9 +445,22 @@ class DeltaX {
   ///
   /// 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);
+    var rules = [
+      html2md.Rule('image', filters: ['img'], replacement: (content, node) {
+        node.asElement()?.attributes.remove('class');
+        //Later we can convert this to delta along with the attributes by GoodInlineHtmlSyntax
+        return node.outerHTML;
+      }),
+    ];
+
+    final markdown = html2md.convert(html, rules: rules).replaceAll('unsafe:', '');
+
+    final mdDocument = md.Document(
+      encodeHtml: false,
+      inlineSyntaxes: [
+        GoodInlineHtmlSyntax(),
+      ],
+    );
 
     final mdToDelta = MarkdownToDelta(markdownDocument: mdDocument);
 
@@ -466,3 +479,24 @@ enum ChangeSource {
   /// Silent change.
   silent;
 }
+
+/// Convert the html to Element, not Text
+class GoodInlineHtmlSyntax extends md.InlineHtmlSyntax {
+  @override
+  onMatch(parser, match) {
+    if (super.onMatch(parser, match)) {
+      return true;
+    }
+
+    var root = html2md.Node.root(match.group(0)!);
+    root = root.childNodes().last.firstChild!;
+
+    var node = md.Element.empty(root.nodeName);
+    var attrs = root.asElement()?.attributes.map((key, value) => MapEntry(key.toString(), value));
+    if (attrs != null) node.attributes.addAll(attrs);
+
+    parser.addNode(node);
+    parser.start = parser.pos;
+    return false;
+  }
+}
diff --git a/lib/src/packages/quill_markdown/markdown_to_delta.dart b/lib/src/packages/quill_markdown/markdown_to_delta.dart
index 76285a15..b070ac25 100644
--- a/lib/src/packages/quill_markdown/markdown_to_delta.dart
+++ b/lib/src/packages/quill_markdown/markdown_to_delta.dart
@@ -208,7 +208,7 @@ class MarkdownToDelta extends Converter<String, Delta>
     final tag = element.tag;
 
     if (_isEmbedElement(element)) {
-      _delta.insert(_toEmbeddable(element).toJson());
+      _delta.insert(_toEmbeddable(element).toJson(), element.attributes);
     }
 
     if (tag == 'br') {