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d5932338f7
and merges in subsequent transactions indiscriminately until it's told to stop. It also gives the last transaction in its child list a chance to merge the next transaction. All this is in support of complex transactions that result in text insertion being able to collapse into a single undoable event. Also improved tracking of bogus content node used when document is empty.
74 lines
2.7 KiB
C++
74 lines
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#ifndef nsTextEditRules_h__
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#define nsTextEditRules_h__
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#include "nsIEditor.h"
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#include "nsCOMPtr.h"
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#include "nsIDOMNode.h"
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class nsTextEditor;
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class PlaceholderTxn;
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/** Object that encapsulates HTML text-specific editing rules.
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*
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* To be a good citizen, edit rules must live by these restrictions:
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* 1. All data manipulation is through the editor.
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* Content nodes in the document tree must <B>not</B> be manipulated directly.
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* Content nodes in document fragments that are not part of the document itself
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* may be manipulated at will. Operations on document fragments must <B>not</B>
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* go through the editor.
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* 2. Selection must not be explicitly set by the rule method.
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* Any manipulation of Selection must be done by the editor.
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*/
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class nsTextEditRules
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{
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public:
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nsTextEditRules();
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virtual ~nsTextEditRules();
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NS_IMETHOD Init(nsTextEditor *aEditor);
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NS_IMETHOD WillInsertBreak(nsIDOMSelection *aSelection, PRBool *aCancel);
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NS_IMETHOD DidInsertBreak(nsIDOMSelection *aSelection, nsresult aResult);
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NS_IMETHOD GetInsertBreakTag(nsIAtom **aTag);
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NS_IMETHOD WillInsertText(nsIDOMSelection *aSelection,
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const nsString& aInputString,
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PRBool *aCancel,
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nsString& aOutputString,
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PlaceholderTxn ** aTxn);
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NS_IMETHOD DidInsertText(nsIDOMSelection *aSelection, const nsString& aStringToInsert, nsresult aResult);
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NS_IMETHOD WillInsert(nsIDOMSelection *aSelection, PRBool *aCancel);
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NS_IMETHOD DidInsert(nsIDOMSelection *aSelection, nsresult aResult);
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NS_IMETHOD WillDeleteSelection(nsIDOMSelection *aSelection, PRBool *aCancel);
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NS_IMETHOD DidDeleteSelection(nsIDOMSelection *aSelection, nsresult aResult);
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protected:
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nsTextEditor *mEditor; // note that we do not refcount the editor
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nsCOMPtr<nsIDOMNode> mBogusNode; // magic node acts as placeholder in empty doc
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};
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#endif //nsTextEditRules_h__
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