gecko-dev/editor/libeditor/base/PlaceholderTxn.h
Michael Wu d2b70213ac Bug 675553 - Switch from PRBool to bool on a CLOSED TREE , r=bsmedberg,khuey,bz,cjones
--HG--
rename : tools/trace-malloc/bloatblame.c => tools/trace-malloc/bloatblame.cpp
2011-09-28 23:19:26 -07:00

112 lines
4.2 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
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*
* The contents of this file are subject to the Mozilla Public License Version
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*
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*
* The Original Code is mozilla.org code.
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* The Initial Developer of the Original Code is
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* Contributor(s):
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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#ifndef AggregatePlaceholderTxn_h__
#define AggregatePlaceholderTxn_h__
#include "EditAggregateTxn.h"
#include "nsEditorUtils.h"
#include "nsIAbsorbingTransaction.h"
#include "nsIDOMNode.h"
#include "nsCOMPtr.h"
#include "nsWeakPtr.h"
#include "nsWeakReference.h"
#include "nsAutoPtr.h"
class nsHTMLEditor;
class IMETextTxn;
/**
* An aggregate transaction that knows how to absorb all subsequent
* transactions with the same name. This transaction does not "Do" anything.
* But it absorbs other transactions via merge, and can undo/redo the
* transactions it has absorbed.
*/
class PlaceholderTxn : public EditAggregateTxn,
public nsIAbsorbingTransaction,
public nsSupportsWeakReference
{
public:
NS_DECL_ISUPPORTS_INHERITED
PlaceholderTxn();
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(PlaceholderTxn, EditAggregateTxn)
// ------------ EditAggregateTxn -----------------------
NS_DECL_EDITTXN
NS_IMETHOD RedoTransaction();
NS_IMETHOD Merge(nsITransaction *aTransaction, bool *aDidMerge);
// ------------ nsIAbsorbingTransaction -----------------------
NS_IMETHOD Init(nsIAtom *aName, nsSelectionState *aSelState, nsIEditor *aEditor);
NS_IMETHOD GetTxnName(nsIAtom **aName);
NS_IMETHOD StartSelectionEquals(nsSelectionState *aSelState, bool *aResult);
NS_IMETHOD EndPlaceHolderBatch();
NS_IMETHOD ForwardEndBatchTo(nsIAbsorbingTransaction *aForwardingAddress);
NS_IMETHOD Commit();
NS_IMETHOD RememberEndingSelection();
protected:
/** the presentation shell, which we'll need to get the selection */
bool mAbsorb; // do we auto absorb any and all transaction?
nsWeakPtr mForwarding;
IMETextTxn *mIMETextTxn; // first IME txn in this placeholder - used for IME merging
// non-owning for now - can't nsCOMPtr it due to broken transaction interfaces
bool mCommitted; // do we stop auto absorbing any matching placeholder txns?
// these next two members store the state of the selection in a safe way.
// selection at the start of the txn is stored, as is the selection at the end.
// This is so that UndoTransaction() and RedoTransaction() can restore the
// selection properly.
nsAutoPtr<nsSelectionState> mStartSel; // use a pointer because this is constructed before we exist
nsSelectionState mEndSel;
nsIEditor* mEditor; /** the editor for this transaction */
};
#endif