The Tor Browser: editor/libeditor/base/DeleteTextTxn.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     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/. */

     6 #ifndef DeleteTextTxn_h__

     7 #define DeleteTextTxn_h__

     9 #include "EditTxn.h"

    10 #include "nsCOMPtr.h"

    11 #include "nsCycleCollectionParticipant.h"

    12 #include "nsID.h"

    13 #include "nsIDOMCharacterData.h"

    14 #include "nsString.h"

    15 #include "nscore.h"

    17 class nsEditor;

    18 class nsRangeUpdater;

    20 /**

    21  * A transaction that removes text from a content node.

    22  */

    23 class DeleteTextTxn : public EditTxn

    24 {

    25 public:

    26   /** initialize the transaction.

    27     * @param aEditor  the provider of basic editing operations

    28     * @param aElement the content node to remove text from

    29     * @param aOffset  the location in aElement to begin the deletion

    30     * @param aNumCharsToDelete  the number of characters to delete.  Not the number of bytes!

    31     */

    32   NS_IMETHOD Init(nsEditor* aEditor,

    33                   nsIDOMCharacterData* aCharData,

    34                   uint32_t aOffset,

    35                   uint32_t aNumCharsToDelete,

    36                   nsRangeUpdater* aRangeUpdater);

    38   DeleteTextTxn();

    40   NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(DeleteTextTxn, EditTxn)

    41   NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr);

    43   NS_DECL_EDITTXN

    45   uint32_t GetOffset() { return mOffset; }

    47   uint32_t GetNumCharsToDelete() { return mNumCharsToDelete; }

    49 protected:

    51   /** the provider of basic editing operations */

    52   nsEditor* mEditor;

    54   /** the CharacterData node to operate upon */

    55   nsCOMPtr<nsIDOMCharacterData> mCharData;

    57   /** the offset into mCharData where the deletion is to take place */

    58   uint32_t mOffset;

    60   /** the number of characters to delete */

    61   uint32_t mNumCharsToDelete;

    63   /** the text that was deleted */

    64   nsString mDeletedText;

    66   /** range updater object */

    67   nsRangeUpdater* mRangeUpdater;

    68 };

    70 #endif

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