Bug 1425412 - part 7: Create SplitNodeTransaction::Create() and remove EditorBase::CreateTxnForSplitNode() r=m_kato

SplitNodeTransaction::Create() just hides what it does.  For making its caller
clearer, let's create a factory method, SplitNodeTransaction::Create().

MozReview-Commit-ID: KDiC8dDrLuQ

--HG--
extra : rebase_source : ac04544e10644b8a73375fb2b786e0bc86eb56ae

editor/libeditor/EditorBase.cpp

@@ -1571,12 +1571,14 @@ EditorBase::SplitNode(const EditorRawDOMPoint& aStartOfRightNode,
   }
 
   RefPtr<SplitNodeTransaction> transaction =
-    CreateTxnForSplitNode(aStartOfRightNode);
+    SplitNodeTransaction::Create(*this, aStartOfRightNode);
   aError = DoTransaction(transaction);
 
   nsCOMPtr<nsIContent> newNode = transaction->GetNewNode();
   NS_WARNING_ASSERTION(newNode, "Failed to create a new left node");
 
+  // XXX Some other transactions manage range updater by themselves.
+  //     Why doesn't SplitNodeTransaction do it?
   mRangeUpdater.SelAdjSplitNode(*aStartOfRightNode.GetContainerAsContent(),
                                 newNode);
 
@@ -3043,15 +3045,6 @@ EditorBase::DeleteText(nsGenericDOMDataNode& aCharData,
   return rv;
 }
 
-already_AddRefed<SplitNodeTransaction>
-EditorBase::CreateTxnForSplitNode(const EditorRawDOMPoint& aStartOfRightNode)
-{
-  MOZ_ASSERT(aStartOfRightNode.IsSetAndValid());
-  RefPtr<SplitNodeTransaction> transaction =
-    new SplitNodeTransaction(*this, aStartOfRightNode);
-  return transaction.forget();
-}
-
 already_AddRefed<JoinNodeTransaction>
 EditorBase::CreateTxnForJoinNode(nsINode& aLeftNode,
                                  nsINode& aRightNode)

editor/libeditor/EditorBase.h

@@ -590,21 +590,6 @@ protected:
   nsresult DeleteText(nsGenericDOMDataNode& aElement,
                       uint32_t aOffset, uint32_t aLength);
 
-  /**
-   * CreateTxnForSplitNode() creates a transaction to create a new node
-   * (left node) identical to an existing node (right node), and split the
-   * contents between the same point in both nodes.
-   *
-   * @param aStartOfRightNode   The point to split.  Its container will be
-   *                            the right node, i.e., become the new node's
-   *                            next sibling.  And the point will be start
-   *                            of the right node.
-   * @return                    The new transaction to split the container of
-   *                            aStartOfRightNode.
-   */
-  already_AddRefed<SplitNodeTransaction>
-    CreateTxnForSplitNode(const EditorRawDOMPoint& aStartOfRightNode);
-
   already_AddRefed<JoinNodeTransaction>
     CreateTxnForJoinNode(nsINode& aLeftNode, nsINode& aRightNode);
 

editor/libeditor/SplitNodeTransaction.cpp

@@ -17,6 +17,16 @@ namespace mozilla {
 
 using namespace dom;
 
+// static
+already_AddRefed<SplitNodeTransaction>
+SplitNodeTransaction::Create(EditorBase& aEditorBase,
+                             const EditorRawDOMPoint& aStartOfRightNode)
+{
+  RefPtr<SplitNodeTransaction> transaction =
+    new SplitNodeTransaction(aEditorBase, aStartOfRightNode);
+  return transaction.forget();
+}
+
 SplitNodeTransaction::SplitNodeTransaction(
                         EditorBase& aEditorBase,
                         const EditorRawDOMPoint& aStartOfRightNode)

editor/libeditor/SplitNodeTransaction.h

@@ -26,16 +26,25 @@ class EditorBase;
  */
 class SplitNodeTransaction final : public EditTransactionBase
 {
+private:
+  SplitNodeTransaction(EditorBase& aEditorBase,
+                       const EditorRawDOMPoint& aStartOfRightNode);
+
 public:
   /**
+   * Creates a transaction to create a new node (left node) identical to an
+   * existing node (right node), and split the contents between the same point
+   * in both nodes.
+   *
    * @param aEditorBase         The provider of core editing operations.
    * @param aStartOfRightNode   The point to split.  Its container will be
    *                            the right node, i.e., become the new node's
    *                            next sibling.  And the point will be start
    *                            of the right node.
    */
-  SplitNodeTransaction(EditorBase& aEditorBase,
-                       const EditorRawDOMPoint& aStartOfRightNode);
+  static already_AddRefed<SplitNodeTransaction>
+  Create(EditorBase& aEditorBase,
+         const EditorRawDOMPoint& aStartOfRightNode);
 
   NS_DECL_ISUPPORTS_INHERITED
   NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(SplitNodeTransaction,