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comparison: editor/libeditor/base/PlaceholderTxn.h
editor/libeditor/base/PlaceholderTxn.h
- changeset 0
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| 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/. */ | |
| 5 | |
| 6 #ifndef AggregatePlaceholderTxn_h__ | |
| 7 #define AggregatePlaceholderTxn_h__ | |
| 8 | |
| 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" | |
| 17 | |
| 18 class nsHTMLEditor; | |
| 19 class IMETextTxn; | |
| 20 | |
| 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 */ | |
| 27 | |
| 28 class PlaceholderTxn : public EditAggregateTxn, | |
| 29 public nsIAbsorbingTransaction, | |
| 30 public nsSupportsWeakReference | |
| 31 { | |
| 32 public: | |
| 33 NS_DECL_ISUPPORTS_INHERITED | |
| 34 | |
| 35 PlaceholderTxn(); | |
| 36 | |
| 37 NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(PlaceholderTxn, EditAggregateTxn) | |
| 38 // ------------ EditAggregateTxn ----------------------- | |
| 39 | |
| 40 NS_DECL_EDITTXN | |
| 41 | |
| 42 NS_IMETHOD RedoTransaction(); | |
| 43 NS_IMETHOD Merge(nsITransaction *aTransaction, bool *aDidMerge); | |
| 44 | |
| 45 // ------------ nsIAbsorbingTransaction ----------------------- | |
| 46 | |
| 47 NS_IMETHOD Init(nsIAtom* aName, nsSelectionState* aSelState, | |
| 48 nsEditor* aEditor); | |
| 49 | |
| 50 NS_IMETHOD GetTxnName(nsIAtom **aName); | |
| 51 | |
| 52 NS_IMETHOD StartSelectionEquals(nsSelectionState *aSelState, bool *aResult); | |
| 53 | |
| 54 NS_IMETHOD EndPlaceHolderBatch(); | |
| 55 | |
| 56 NS_IMETHOD ForwardEndBatchTo(nsIAbsorbingTransaction *aForwardingAddress); | |
| 57 | |
| 58 NS_IMETHOD Commit(); | |
| 59 | |
| 60 NS_IMETHOD RememberEndingSelection(); | |
| 61 | |
| 62 protected: | |
| 63 | |
| 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 }; | |
| 78 | |
| 79 | |
| 80 #endif |
