The Tor Browser: editor/libeditor/base/PlaceholderTxn.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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 AggregatePlaceholderTxn_h__

     7 #define AggregatePlaceholderTxn_h__

     9 #include "EditAggregateTxn.h"

    10 #include "nsEditorUtils.h"

    11 #include "nsIAbsorbingTransaction.h"

    12 #include "nsIDOMNode.h"

    13 #include "nsCOMPtr.h"

    14 #include "nsWeakPtr.h"

    15 #include "nsWeakReference.h"

    16 #include "nsAutoPtr.h"

    18 class nsHTMLEditor;

    19 class IMETextTxn;

    21 /**

    22  * An aggregate transaction that knows how to absorb all subsequent

    23  * transactions with the same name.  This transaction does not "Do" anything.

    24  * But it absorbs other transactions via merge, and can undo/redo the

    25  * transactions it has absorbed.

    26  */

    28 class PlaceholderTxn : public EditAggregateTxn,

    29                        public nsIAbsorbingTransaction,

    30                        public nsSupportsWeakReference

    31 {

    32 public:

    33   NS_DECL_ISUPPORTS_INHERITED

    35   PlaceholderTxn();

    37   NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(PlaceholderTxn, EditAggregateTxn)

    38 // ------------ EditAggregateTxn -----------------------

    40   NS_DECL_EDITTXN

    42   NS_IMETHOD RedoTransaction();

    43   NS_IMETHOD Merge(nsITransaction *aTransaction, bool *aDidMerge);

    45 // ------------ nsIAbsorbingTransaction -----------------------

    47   NS_IMETHOD Init(nsIAtom* aName, nsSelectionState* aSelState,

    48                   nsEditor* aEditor);

    50   NS_IMETHOD GetTxnName(nsIAtom **aName);

    52   NS_IMETHOD StartSelectionEquals(nsSelectionState *aSelState, bool *aResult);

    54   NS_IMETHOD EndPlaceHolderBatch();

    56   NS_IMETHOD ForwardEndBatchTo(nsIAbsorbingTransaction *aForwardingAddress);

    58   NS_IMETHOD Commit();

    60   NS_IMETHOD RememberEndingSelection();

    62 protected:

    64   /** the presentation shell, which we'll need to get the selection */

    65   bool        mAbsorb;          // do we auto absorb any and all transaction?

    66   nsWeakPtr   mForwarding;

    67   IMETextTxn *mIMETextTxn;      // first IME txn in this placeholder - used for IME merging

    68                                 // non-owning for now - can't nsCOMPtr it due to broken transaction interfaces

    69   bool        mCommitted;       // do we stop auto absorbing any matching placeholder txns?

    70   // these next two members store the state of the selection in a safe way.

    71   // selection at the start of the txn is stored, as is the selection at the end.

    72   // This is so that UndoTransaction() and RedoTransaction() can restore the

    73   // selection properly.

    74   nsAutoPtr<nsSelectionState> mStartSel; // use a pointer because this is constructed before we exist

    75   nsSelectionState  mEndSel;

    76   nsEditor*         mEditor;   /** the editor for this transaction */

    77 };

    80 #endif

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