85 lines
2.9 KiB
C++
85 lines
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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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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#include "nsAutoPtr.h"
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namespace mozilla {
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namespace dom {
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class IMETextTxn;
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} // namespace dom
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} // namespace mozilla
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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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NS_DECL_ISUPPORTS_INHERITED
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PlaceholderTxn();
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(PlaceholderTxn, EditAggregateTxn)
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// ------------ EditAggregateTxn -----------------------
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NS_DECL_EDITTXN
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NS_IMETHOD RedoTransaction() override;
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NS_IMETHOD Merge(nsITransaction *aTransaction, bool *aDidMerge) override;
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// ------------ nsIAbsorbingTransaction -----------------------
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NS_IMETHOD Init(nsIAtom* aName, nsSelectionState* aSelState,
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nsEditor* aEditor) override;
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NS_IMETHOD GetTxnName(nsIAtom **aName) override;
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NS_IMETHOD StartSelectionEquals(nsSelectionState *aSelState, bool *aResult) override;
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NS_IMETHOD EndPlaceHolderBatch() override;
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NS_IMETHOD ForwardEndBatchTo(nsIAbsorbingTransaction *aForwardingAddress) override;
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NS_IMETHOD Commit() override;
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nsresult RememberEndingSelection();
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protected:
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virtual ~PlaceholderTxn();
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/** the presentation shell, which we'll need to get the selection */
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bool mAbsorb; // do we auto absorb any and all transaction?
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nsWeakPtr mForwarding;
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mozilla::dom::IMETextTxn *mIMETextTxn; // first IME txn in this placeholder - used for IME merging
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// non-owning for now - can't nsCOMPtr it due to broken transaction interfaces
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bool 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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nsAutoPtr<nsSelectionState> mStartSel; // use a pointer because this is constructed before we exist
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nsSelectionState mEndSel;
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nsEditor* mEditor; /** the editor for this transaction */
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};
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#endif
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