refactor: using predefined operation insert node to create new nodes.

frontend/appflowy_flutter/packages/appflowy_editor/lib/src/core/transform/transaction.dart

@@ -33,19 +33,19 @@ class Transaction {
 
   /// Inserts the [Node] at the given [Path].
   void insertNode(
-    Path path,
-    Node node, {
-    bool deepCopy = true,
-  }) {
+      Path path,
+      Node node, {
+        bool deepCopy = true,
+      }) {
     insertNodes(path, [node], deepCopy: deepCopy);
   }
 
   /// Inserts a sequence of [Node]s at the given [Path].
   void insertNodes(
-    Path path,
-    Iterable<Node> nodes, {
-    bool deepCopy = true,
-  }) {
+      Path path,
+      Iterable<Node> nodes, {
+        bool deepCopy = true,
+      }) {
     if (deepCopy) {
       add(InsertOperation(path, nodes.map((e) => e.copyWith())));
     } else {
@@ -122,9 +122,7 @@ class Transaction {
   void add(Operation op, {bool transform = true}) {
     final Operation? last = operations.isEmpty ? null : operations.last;
     if (last != null) {
-      if (op is UpdateTextOperation &&
-          last is UpdateTextOperation &&
-          op.path.equals(last.path)) {
+      if (op is UpdateTextOperation && last is UpdateTextOperation && op.path.equals(last.path)) {
         final newOp = UpdateTextOperation(
           op.path,
           last.delta.compose(op.delta),
@@ -148,11 +146,11 @@ class Transaction {
 
 extension TextTransaction on Transaction {
   void mergeText(
-    TextNode first,
-    TextNode second, {
-    int? firstOffset,
-    int secondOffset = 0,
-  }) {
+      TextNode first,
+      TextNode second, {
+        int? firstOffset,
+        int secondOffset = 0,
+      }) {
     final firstLength = first.delta.length;
     final secondLength = second.delta.length;
     firstOffset ??= firstLength;
@@ -192,15 +190,14 @@ extension TextTransaction on Transaction {
   /// Optionally, you may specify formatting attributes that are applied to the inserted string.
   /// By default, the formatting attributes before the insert position will be reused.
   void insertText(
-    TextNode textNode,
-    int index,
-    String text, {
-    Attributes? attributes,
-  }) {
+      TextNode textNode,
+      int index,
+      String text, {
+        Attributes? attributes,
+      }) {
     var newAttributes = attributes;
     if (index != 0 && attributes == null) {
-      newAttributes =
-          textNode.delta.slice(max(index - 1, 0), index).first.attributes;
+      newAttributes = textNode.delta.slice(max(index - 1, 0), index).first.attributes;
       if (newAttributes != null) {
         newAttributes = {...newAttributes}; // make a copy
       }
@@ -218,11 +215,11 @@ extension TextTransaction on Transaction {
 
   /// Assigns a formatting attributes to a range of text.
   void formatText(
-    TextNode textNode,
-    int index,
-    int length,
-    Attributes attributes,
-  ) {
+      TextNode textNode,
+      int index,
+      int length,
+      Attributes attributes,
+      ) {
     afterSelection = beforeSelection;
     updateText(
       textNode,
@@ -234,10 +231,10 @@ extension TextTransaction on Transaction {
 
   /// Deletes the text of specified length starting at index.
   void deleteText(
-    TextNode textNode,
-    int index,
-    int length,
-  ) {
+      TextNode textNode,
+      int index,
+      int length,
+      ) {
     updateText(
       textNode,
       Delta()
@@ -254,16 +251,15 @@ extension TextTransaction on Transaction {
   /// Optionally, you may specify formatting attributes that are applied to the inserted string.
   /// By default, the formatting attributes before the insert position will be reused.
   void replaceText(
-    TextNode textNode,
-    int index,
-    int length,
-    String text, {
-    Attributes? attributes,
-  }) {
+      TextNode textNode,
+      int index,
+      int length,
+      String text, {
+        Attributes? attributes,
+      }) {
     var newAttributes = attributes;
     if (index != 0 && attributes == null) {
-      newAttributes =
-          textNode.delta.slice(max(index - 1, 0), index).first.attributes;
+      newAttributes = textNode.delta.slice(max(index - 1, 0), index).first.attributes;
       if (newAttributes == null) {
         final slicedDelta = textNode.delta.slice(index, index + length);
         if (slicedDelta.isNotEmpty) {
@@ -287,10 +283,10 @@ extension TextTransaction on Transaction {
   }
 
   void replaceTexts(
-    List<TextNode> textNodes,
-    Selection selection,
-    List<String> texts,
-  ) {
+      List<TextNode> textNodes,
+      Selection selection,
+      List<String> texts,
+      ) {
     if (textNodes.isEmpty || texts.isEmpty) {
       return;
     }
@@ -388,6 +384,7 @@ extension TextTransaction on Transaction {
             textNodes.first.toPlainText().length,
             text,
           );
+          path = path.next;
         } else if (i == length - 1 && textNodes.length >= 2) {
           replaceText(
             textNodes.last,
@@ -395,6 +392,7 @@ extension TextTransaction on Transaction {
             selection.endIndex,
             text,
           );
+          path = path.next;
         } else {
           if (i < textNodes.length - 1) {
             replaceText(
@@ -403,24 +401,26 @@ extension TextTransaction on Transaction {
               textNodes[i].toPlainText().length,
               text,
             );
+            path = path.next;
           } else {
             if (i == texts.length - 1) {
               //ADD OFFSET CHARACTER TO END OF LAST TEXT-NODE TO AVOID DATA LOSS
-              document.insert(path, [
+              insertNode(
+                path,
                 TextNode(
                   delta: Delta()..insert("${text}${offSetChar}"),
                 ),
-              ]);
+              );
             } else {
-              document.insert(path, [
+              insertNode(
+                path,
                 TextNode(
                   delta: Delta()..insert(text),
                 ),
-              ]);
+              );
             }
           }
         }
-        path = path.next;
       }
       afterSelection = null;
       return;