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130 lines
4.5 KiB
C++
130 lines
4.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998-1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef AggregatePlaceholderTxn_h__
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#define AggregatePlaceholderTxn_h__
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#include "EditAggregateTxn.h"
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#include "nsEditorUtils.h"
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#include "nsIAbsorbingTransaction.h"
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#include "nsIDOMNode.h"
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#include "nsCOMPtr.h"
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#include "nsWeakPtr.h"
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#include "nsWeakReference.h"
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#define PLACEHOLDER_TXN_CID \
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{/* {0CE9FB00-D9D1-11d2-86DE-000064657374} */ \
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0x0CE9FB00, 0xD9D1, 0x11d2, \
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{0x86, 0xde, 0x0, 0x0, 0x64, 0x65, 0x73, 0x74} }
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class nsHTMLEditor;
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class IMETextTxn;
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/**
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* An aggregate transaction that knows how to absorb all subsequent
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* transactions with the same name. This transaction does not "Do" anything.
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* But it absorbs other transactions via merge, and can undo/redo the
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* transactions it has absorbed.
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*/
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class PlaceholderTxn : public EditAggregateTxn,
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public nsIAbsorbingTransaction,
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public nsSupportsWeakReference
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{
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public:
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static const nsIID& GetCID() { static const nsIID iid = PLACEHOLDER_TXN_CID; return iid; }
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NS_DECL_ISUPPORTS_INHERITED
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private:
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PlaceholderTxn();
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public:
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virtual ~PlaceholderTxn();
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// ------------ EditAggregateTxn -----------------------
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NS_IMETHOD DoTransaction(void);
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NS_IMETHOD UndoTransaction(void);
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NS_IMETHOD RedoTransaction(void);
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NS_IMETHOD Merge(nsITransaction *aTransaction, PRBool *aDidMerge);
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NS_IMETHOD GetTxnDescription(nsAString& aTxnDescription);
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// ------------ nsIAbsorbingTransaction -----------------------
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NS_IMETHOD Init(nsIAtom *aName, nsSelectionState *aSelState, nsIEditor *aEditor);
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NS_IMETHOD GetTxnName(nsIAtom **aName);
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NS_IMETHOD StartSelectionEquals(nsSelectionState *aSelState, PRBool *aResult);
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NS_IMETHOD EndPlaceHolderBatch();
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NS_IMETHOD ForwardEndBatchTo(nsIAbsorbingTransaction *aForwardingAddress);
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NS_IMETHOD Commit();
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NS_IMETHOD RememberEndingSelection();
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friend class TransactionFactory;
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protected:
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/** the presentation shell, which we'll need to get the selection */
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PRBool mAbsorb; // do we auto absorb any and all transaction?
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nsWeakPtr mForwarding;
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IMETextTxn *mIMETextTxn; // first IME txn in this placeholder - used for IME merging
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// non-owning for now - cant nsCOMPtr it due to broken transaction interfaces
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PRBool mCommitted; // do we stop auto absorbing any matching placeholder txns?
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// these next two members store the state of the selection in a safe way.
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// selection at the start of the txn is stored, as is the selection at the end.
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// This is so that UndoTransaction() and RedoTransaction() can restore the
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// selection properly.
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nsSelectionState *mStartSel; // use a pointer because this is constructed before we exist
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nsSelectionState mEndSel;
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nsIEditor* mEditor; /** the editor for this transaction */
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};
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#endif
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