mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-13 21:35:39 +00:00
133 lines
3.8 KiB
C++
133 lines
3.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
*
|
|
* The contents of this file are subject to the Netscape Public
|
|
* License Version 1.1 (the "License"); you may not use this file
|
|
* except in compliance with the License. You may obtain a copy of
|
|
* the License at http://www.mozilla.org/NPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS
|
|
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
|
|
* implied. See the License for the specific language governing
|
|
* rights and limitations under the License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is Netscape
|
|
* Communications Corporation. Portions created by Netscape are
|
|
* Copyright (C) 1998 Netscape Communications Corporation. All
|
|
* Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*/
|
|
|
|
|
|
#ifndef nsEditorUtils_h__
|
|
#define nsEditorUtils_h__
|
|
|
|
|
|
#include "nsCOMPtr.h"
|
|
#include "nsIDOMNode.h"
|
|
#include "nsIDOMSelection.h"
|
|
#include "nsIEditor.h"
|
|
#include "nsIAtom.h"
|
|
#include "nsVoidArray.h"
|
|
#include "nsEditor.h"
|
|
|
|
/***************************************************************************
|
|
* stack based helper class for batching a collection of txns inside a
|
|
* placeholder txn.
|
|
*/
|
|
class nsAutoPlaceHolderBatch
|
|
{
|
|
private:
|
|
nsCOMPtr<nsIEditor> mEd;
|
|
public:
|
|
nsAutoPlaceHolderBatch( nsIEditor *aEd, nsIAtom *atom) : mEd(do_QueryInterface(aEd))
|
|
{ if (mEd) mEd->BeginPlaceHolderTransaction(atom); }
|
|
~nsAutoPlaceHolderBatch() { if (mEd) mEd->EndPlaceHolderTransaction(); }
|
|
};
|
|
|
|
|
|
/***************************************************************************
|
|
* stack based helper class for batching a collection of txns.
|
|
* Note: I changed this to use placeholder batching so that we get
|
|
* proper selection save/restore across undo/redo.
|
|
*/
|
|
class nsAutoEditBatch : public nsAutoPlaceHolderBatch
|
|
{
|
|
public:
|
|
nsAutoEditBatch( nsIEditor *aEd) : nsAutoPlaceHolderBatch(aEd,nsnull) {}
|
|
~nsAutoEditBatch() {}
|
|
};
|
|
|
|
/***************************************************************************
|
|
* stack based helper class for saving/restoring selection. Note that this
|
|
* assumes that the nodes involved are still around afterwards!
|
|
*/
|
|
class nsAutoSelectionReset
|
|
{
|
|
private:
|
|
/** ref-counted reference to the selection that we are supposed to restore */
|
|
nsCOMPtr<nsIDOMSelection> mSel;
|
|
nsEditor *mEd; // non-owning ref to nsEditor
|
|
|
|
public:
|
|
/** constructor responsible for remembering all state needed to restore aSel */
|
|
nsAutoSelectionReset(nsIDOMSelection *aSel, nsEditor *aEd);
|
|
|
|
/** destructor restores mSel to its former state */
|
|
~nsAutoSelectionReset();
|
|
};
|
|
|
|
/***************************************************************************
|
|
* stack based helper class for StartOperation()/EndOperation() sandwich
|
|
*/
|
|
class nsAutoRules
|
|
{
|
|
public:
|
|
|
|
nsAutoRules(nsEditor *ed, PRInt32 action, nsIEditor::EDirection aDirection) :
|
|
mEd(ed), mAction(action), mDirection(aDirection)
|
|
{if (mEd) mEd->StartOperation(mAction, mDirection);}
|
|
~nsAutoRules() {if (mEd) mEd->EndOperation(mAction, mDirection);}
|
|
|
|
protected:
|
|
nsEditor *mEd;
|
|
PRInt32 mAction;
|
|
nsIEditor::EDirection mDirection;
|
|
};
|
|
|
|
|
|
/***************************************************************************
|
|
* stack based helper class for turning off active selection adjustment
|
|
* by low level transactions
|
|
*/
|
|
class nsAutoTxnsConserveSelection
|
|
{
|
|
public:
|
|
|
|
nsAutoTxnsConserveSelection(nsEditor *ed) : mEd(ed), mOldState(PR_TRUE)
|
|
{
|
|
if (mEd)
|
|
{
|
|
mOldState = mEd->GetShouldTxnSetSelection();
|
|
mEd->SetShouldTxnSetSelection(PR_FALSE);
|
|
}
|
|
}
|
|
|
|
~nsAutoTxnsConserveSelection()
|
|
{
|
|
if (mEd)
|
|
{
|
|
mEd->SetShouldTxnSetSelection(mOldState);
|
|
}
|
|
}
|
|
|
|
protected:
|
|
nsEditor *mEd;
|
|
PRBool mOldState;
|
|
};
|
|
|
|
|
|
#endif // nsEditorUtils_h__
|