Fix insertion of embeds when selection is not empty

packages/notus/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.1.4
+
+* Fixed insertion of embeds when selection is not empty (#115)
+
 ## 0.1.3
 
 * Fixed handling of user input around embeds

packages/notus/lib/src/document.dart

@@ -161,10 +161,24 @@ class NotusDocument {
   /// unchanged and no [NotusChange] is published to [changes] stream.
   Delta format(int index, int length, NotusAttribute attribute) {
     assert(index >= 0 && length >= 0 && attribute != null);
-    final change = _heuristics.applyFormatRules(this, index, length, attribute);
-    if (change.isNotEmpty) {
-      compose(change, ChangeSource.local);
+
+    Delta change = Delta();
+
+    if (attribute is EmbedAttribute && length > 0) {
+      // Must delete selected length of text before applying embed attribute
+      // since inserting an embed in non-empty selection is essentially a
+      // replace operation.
+      change = delete(index, length);
+      length = 0;
     }
+
+    final formatChange =
+        _heuristics.applyFormatRules(this, index, length, attribute);
+    if (formatChange.isNotEmpty) {
+      compose(formatChange, ChangeSource.local);
+      change = change.compose(formatChange);
+    }
+
     return change;
   }
 

packages/notus/pubspec.yaml

@@ -1,16 +1,16 @@
 name: notus
 description: Platform-agnostic rich text document model based on Delta format and used in Zefyr editor.
-version: 0.1.3
+version: 0.1.4
 author: Anatoly Pulyaevskiy <[email protected]>
 homepage: https://github.com/memspace/zefyr
 
 environment:
-  sdk: '>=2.0.0-dev.58.0 <3.0.0'
+  sdk: '>=2.0.0 <3.0.0'
 
 dependencies:
   collection: ^1.14.6
   meta: ^1.1.0
-  quill_delta: ^1.0.0-dev
+  quill_delta: ^1.0.0
   quiver_hashcode: ^2.0.0
 
 dev_dependencies:

packages/notus/test/document_test.dart

@@ -328,5 +328,17 @@ void main() {
           '${EmbedNode.kPlainTextPlaceholder}\n');
       expect(doc.root.children.elementAt(2).toPlainText(), 'Los Angeles\n');
     });
+
+    test('replace embed with embed', () {
+      final doc = dartconfDoc();
+      doc.format(4, 4, NotusAttribute.embed.horizontalRule);
+      doc.format(5, 1, NotusAttribute.embed.horizontalRule);
+
+      expect(doc.root.children, hasLength(3));
+      expect(doc.root.children.elementAt(0).toPlainText(), 'Dart\n');
+      expect(doc.root.children.elementAt(1).toPlainText(),
+          '${EmbedNode.kPlainTextPlaceholder}\n');
+      expect(doc.root.children.elementAt(2).toPlainText(), 'Los Angeles\n');
+    });
   });
 }