mirror of
https://github.com/rn10950/RetroZilla.git
synced 2024-11-14 03:30:17 +01:00
290 lines
8.1 KiB
C++
290 lines
8.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla 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/MPL/
|
|
*
|
|
* 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 the Initial Developer are Copyright (C) 1998
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either of the GNU General Public License Version 2 or later (the "GPL"),
|
|
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
|
|
#ifndef nsEditorUtils_h__
|
|
#define nsEditorUtils_h__
|
|
|
|
|
|
#include "nsCOMPtr.h"
|
|
#include "nsIDOMNode.h"
|
|
#include "nsISelection.h"
|
|
#include "nsIEditor.h"
|
|
#include "nsIAtom.h"
|
|
#include "nsVoidArray.h"
|
|
#include "nsEditor.h"
|
|
#include "nsIContentIterator.h"
|
|
#include "nsCOMArray.h"
|
|
|
|
class nsPlaintextEditor;
|
|
|
|
/***************************************************************************
|
|
* 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<nsISelection> mSel;
|
|
nsEditor *mEd; // non-owning ref to nsEditor
|
|
|
|
public:
|
|
/** constructor responsible for remembering all state needed to restore aSel */
|
|
nsAutoSelectionReset(nsISelection *aSel, nsEditor *aEd);
|
|
|
|
/** destructor restores mSel to its former state */
|
|
~nsAutoSelectionReset();
|
|
|
|
/** Abort: cancel selection saver */
|
|
void Abort();
|
|
};
|
|
|
|
/***************************************************************************
|
|
* stack based helper class for StartOperation()/EndOperation() sandwich
|
|
*/
|
|
class nsAutoRules
|
|
{
|
|
public:
|
|
|
|
nsAutoRules(nsEditor *ed, PRInt32 action, nsIEditor::EDirection aDirection) :
|
|
mEd(ed), mDoNothing(PR_FALSE)
|
|
{
|
|
if (mEd && !mEd->mAction) // mAction will already be set if this is nested call
|
|
{
|
|
mEd->StartOperation(action, aDirection);
|
|
}
|
|
else mDoNothing = PR_TRUE; // nested calls will end up here
|
|
}
|
|
~nsAutoRules()
|
|
{
|
|
if (mEd && !mDoNothing)
|
|
{
|
|
mEd->EndOperation();
|
|
}
|
|
}
|
|
|
|
protected:
|
|
nsEditor *mEd;
|
|
PRBool mDoNothing;
|
|
};
|
|
|
|
|
|
/***************************************************************************
|
|
* 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;
|
|
};
|
|
|
|
/***************************************************************************
|
|
* stack based helper class for batching reflow and paint requests.
|
|
*/
|
|
class nsAutoUpdateViewBatch
|
|
{
|
|
public:
|
|
|
|
nsAutoUpdateViewBatch(nsEditor *ed) : mEd(ed)
|
|
{
|
|
NS_ASSERTION(mEd, "null mEd pointer!");
|
|
|
|
if (mEd)
|
|
mEd->BeginUpdateViewBatch();
|
|
}
|
|
|
|
~nsAutoUpdateViewBatch()
|
|
{
|
|
if (mEd)
|
|
mEd->EndUpdateViewBatch();
|
|
}
|
|
|
|
protected:
|
|
nsEditor *mEd;
|
|
};
|
|
|
|
/******************************************************************************
|
|
* some helper classes for iterating the dom tree
|
|
*****************************************************************************/
|
|
|
|
class nsDomIterFunctor
|
|
{
|
|
public:
|
|
virtual void* operator()(nsIDOMNode* aNode)=0;
|
|
};
|
|
|
|
class nsBoolDomIterFunctor
|
|
{
|
|
public:
|
|
virtual PRBool operator()(nsIDOMNode* aNode)=0;
|
|
};
|
|
|
|
class nsDOMIterator
|
|
{
|
|
public:
|
|
nsDOMIterator();
|
|
virtual ~nsDOMIterator();
|
|
|
|
nsresult Init(nsIDOMRange* aRange);
|
|
nsresult Init(nsIDOMNode* aNode);
|
|
void ForEach(nsDomIterFunctor& functor) const;
|
|
nsresult AppendList(nsBoolDomIterFunctor& functor,
|
|
nsCOMArray<nsIDOMNode>& arrayOfNodes) const;
|
|
protected:
|
|
nsCOMPtr<nsIContentIterator> mIter;
|
|
};
|
|
|
|
class nsDOMSubtreeIterator : public nsDOMIterator
|
|
{
|
|
public:
|
|
nsDOMSubtreeIterator();
|
|
virtual ~nsDOMSubtreeIterator();
|
|
|
|
nsresult Init(nsIDOMRange* aRange);
|
|
nsresult Init(nsIDOMNode* aNode);
|
|
};
|
|
|
|
class nsTrivialFunctor : public nsBoolDomIterFunctor
|
|
{
|
|
public:
|
|
virtual PRBool operator()(nsIDOMNode* aNode) // used to build list of all nodes iterator covers
|
|
{
|
|
return PR_TRUE;
|
|
}
|
|
};
|
|
|
|
|
|
/******************************************************************************
|
|
* general dom point utility struct
|
|
*****************************************************************************/
|
|
struct DOMPoint
|
|
{
|
|
nsCOMPtr<nsIDOMNode> node;
|
|
PRInt32 offset;
|
|
|
|
DOMPoint() : node(0),offset(0) {}
|
|
DOMPoint(nsIDOMNode *aNode, PRInt32 aOffset) :
|
|
node(aNode),offset(aOffset) {}
|
|
void SetPoint(nsIDOMNode *aNode, PRInt32 aOffset)
|
|
{
|
|
node = aNode; offset = aOffset;
|
|
}
|
|
void GetPoint(nsCOMPtr<nsIDOMNode> &aNode, PRInt32 &aOffset)
|
|
{
|
|
aNode = node; aOffset = offset;
|
|
}
|
|
};
|
|
|
|
|
|
class nsEditorUtils
|
|
{
|
|
public:
|
|
static PRBool IsDescendantOf(nsIDOMNode *aNode, nsIDOMNode *aParent, PRInt32 *aOffset = 0);
|
|
static PRBool IsLeafNode(nsIDOMNode *aNode);
|
|
};
|
|
|
|
|
|
class nsIDragSession;
|
|
class nsITransferable;
|
|
class nsIDOMEvent;
|
|
class nsISimpleEnumerator;
|
|
|
|
class nsEditorHookUtils
|
|
{
|
|
public:
|
|
static PRBool DoAllowDragHook(nsIDOMDocument *aDoc, nsIDOMEvent *aEvent);
|
|
static PRBool DoDragHook(nsIDOMDocument *aDoc, nsIDOMEvent *aEvent,
|
|
nsITransferable *aTrans);
|
|
static PRBool DoAllowDropHook(nsIDOMDocument *aDoc, nsIDOMEvent *aEvent,
|
|
nsIDragSession *aSession);
|
|
static PRBool DoInsertionHook(nsIDOMDocument *aDoc, nsIDOMEvent *aEvent,
|
|
nsITransferable *aTrans);
|
|
private:
|
|
static nsresult GetHookEnumeratorFromDocument(nsIDOMDocument *aDoc,
|
|
nsISimpleEnumerator **aEnumerator);
|
|
};
|
|
|
|
#endif // nsEditorUtils_h__
|