Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* This Source Code Form is subject to the terms of the Mozilla Public
       3             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       4             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       5             : 
       6             : #ifndef DeleteRangeTransaction_h
       7             : #define DeleteRangeTransaction_h
       8             : 
       9             : #include "EditAggregateTransaction.h"
      10             : #include "nsCycleCollectionParticipant.h"
      11             : #include "nsID.h"
      12             : #include "nsIEditor.h"
      13             : #include "nsISupportsImpl.h"
      14             : #include "nsRange.h"
      15             : #include "nscore.h"
      16             : 
      17             : class nsINode;
      18             : 
      19             : namespace mozilla {
      20             : 
      21             : class EditorBase;
      22             : class RangeUpdater;
      23             : 
      24             : /**
      25             :  * A transaction that deletes an entire range in the content tree
      26             :  */
      27           0 : class DeleteRangeTransaction final : public EditAggregateTransaction
      28             : {
      29             : public:
      30             :   /**
      31             :    * @param aEditorBase         The object providing basic editing operations.
      32             :    * @param aRangeToDelete      The range to delete.
      33             :    */
      34             :   DeleteRangeTransaction(EditorBase& aEditorBase,
      35             :                          nsRange& aRangeToDelete,
      36             :                          RangeUpdater* aRangeUpdater);
      37             : 
      38           0 :   NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(DeleteRangeTransaction,
      39             :                                            EditAggregateTransaction)
      40             :   NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr) override;
      41             : 
      42             :   NS_DECL_EDITTRANSACTIONBASE
      43             : 
      44             :   NS_IMETHOD RedoTransaction() override;
      45             : 
      46           0 :   virtual void LastRelease() override
      47             :   {
      48           0 :     mRangeToDelete = nullptr;
      49           0 :     EditAggregateTransaction::LastRelease();
      50           0 :   }
      51             : 
      52             : protected:
      53             :   nsresult CreateTxnsToDeleteBetween(nsINode* aNode,
      54             :                                      int32_t aStartOffset,
      55             :                                      int32_t aEndOffset);
      56             : 
      57             :   nsresult CreateTxnsToDeleteNodesBetween(nsRange* aRangeToDelete);
      58             : 
      59             :   nsresult CreateTxnsToDeleteContent(nsINode* aParent,
      60             :                                      int32_t aOffset,
      61             :                                      nsIEditor::EDirection aAction);
      62             : 
      63             :   // The editor for this transaction.
      64             :   RefPtr<EditorBase> mEditorBase;
      65             : 
      66             :   // P1 in the range.  This is only non-null until DoTransaction is called and
      67             :   // we convert it into child transactions.
      68             :   RefPtr<nsRange> mRangeToDelete;
      69             : 
      70             :   // Range updater object.
      71             :   RangeUpdater* mRangeUpdater;
      72             : };
      73             : 
      74             : } // namespace mozilla
      75             : 
      76             : #endif // #ifndef DeleteRangeTransaction_h