Fix: issue where mergers does not works as expected (#3)

* Fix: issue where mergers does not works as expected

* Chore: reinserted a missed test

---------

Co-authored-by: CatHood0 <santiagowmar@gmail.com>

Author: CatHood0

lib/easy_parser/block_merger_builder.dart

@@ -15,6 +15,22 @@ class BlockMergerBuilder extends MergerBuilder {
       final Paragraph curParagraph = paragraphs.elementAt(i);
       final Paragraph? nextParagraph = paragraphs.elementAtOrNull(i + 1);
       if (indexsIgnore.contains(i)) {
+        if (nextParagraph != null) {
+          if (canMergeBothParagraphs(
+              paragraph: curParagraph, nextParagraph: nextParagraph)) {
+            final Paragraph lastParagraph = result.last;
+            final Paragraph paragraphResult = Paragraph(
+              lines: <Line>[
+                ...lastParagraph.lines,
+                ...nextParagraph.lines,
+              ],
+              blockAttributes: curParagraph.blockAttributes,
+              type: curParagraph.type,
+            );
+            result[result.length - 1] = paragraphResult;
+            indexsIgnore.add(i + 1);
+          }
+        }
         continue;
       }
       // check if the current iteration is the last

lib/easy_parser/common_merger_builder.dart

@@ -18,6 +18,22 @@ class CommonMergerBuilder extends MergerBuilder {
       final Paragraph curParagraph = paragraphs.elementAt(i);
       final Paragraph? nextParagraph = paragraphs.elementAtOrNull(i + 1);
       if (indexsIgnore.contains(i)) {
+        if (nextParagraph != null) {
+          if (canMergeBothParagraphs(
+              paragraph: curParagraph, nextParagraph: nextParagraph)) {
+            final Paragraph lastParagraph = result.last;
+            final Paragraph paragraphResult = Paragraph(
+              lines: <Line>[
+                ...lastParagraph.lines,
+                ...nextParagraph.lines,
+              ],
+              blockAttributes: curParagraph.blockAttributes,
+              type: curParagraph.type,
+            );
+            result[result.length - 1] = paragraphResult;
+            indexsIgnore.add(i + 1);
+          }
+        }
         continue;
       }
       // check if the current iteration is the last

test/flutter_quill_delta_easy_parser_test.dart

@@ -206,6 +206,34 @@ void main() {
     _execExpects(parsedDocument, expectedDocument);
   });
 
+  test(
+      'Should merge different paragraphs with similar attributes into a same one',
+      () {
+    final Delta delta = Delta()
+      ..insert('void main() {')
+      ..insert('\n', {'code-block': true})
+      ..insert('  print("hello world!");')
+      ..insert('\n', {'code-block': true})
+      ..insert('}')
+      ..insert('\n', {'code-block': true})
+      ..insert('\n');
+
+    final Document expectedDocument = Document(paragraphs: [
+      Paragraph.sealed(
+        lines: [
+          Line.fromData(data: 'void main() {'),
+          Line.fromData(data: '  print("hello world!");'),
+          Line.fromData(data: '}'),
+        ],
+        blockAttributes: {"code-block": true},
+        type: ParagraphType.block,
+      ),
+      Paragraph.newLine(),
+    ]);
+    final Document? parsedDocument = DocumentParser().parseDelta(delta: delta);
+    _execExpects(parsedDocument, expectedDocument);
+  });
+
   test('Should handle empty Delta', () {
     final Delta emptyDelta = Delta();