gecko-dev/editor/base/nsEditorUtils.cpp

199 lines
5.6 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):
*/
#include "nsEditorUtils.h"
#include "nsIDOMDocument.h"
#include "nsIDOMRange.h"
#include "nsIContent.h"
#include "nsLayoutCID.h"
/******************************************************************************
* nsAutoSelectionReset
*****************************************************************************/
nsAutoSelectionReset::nsAutoSelectionReset(nsISelection *aSel, nsEditor *aEd) :
mSel(nsnull)
,mEd(nsnull)
{
if (!aSel || !aEd) return; // not much we can do, bail.
if (aEd->ArePreservingSelection()) return; // we already have initted mSavedSel, so this must be nested call.
mSel = do_QueryInterface(aSel);
mEd = aEd;
if (mSel)
{
mEd->PreserveSelectionAcrossActions(mSel);
}
}
nsAutoSelectionReset::~nsAutoSelectionReset()
{
if (mSel && mEd->ArePreservingSelection()) // mSel will be null if this was nested call
{
mEd->RestorePreservedSelection(mSel);
}
}
void
nsAutoSelectionReset::Abort()
{
mEd->StopPreservingSelection();
}
/******************************************************************************
* some helper classes for iterating the dom tree
*****************************************************************************/
static NS_DEFINE_IID(kSubtreeIteratorCID, NS_SUBTREEITERATOR_CID);
static NS_DEFINE_IID(kContentIteratorCID, NS_CONTENTITERATOR_CID);
nsDOMIterator::nsDOMIterator() :
mIter(nsnull)
{
}
nsDOMIterator::~nsDOMIterator()
{
}
nsresult
nsDOMIterator::Init(nsIDOMRange* aRange)
{
nsresult res = nsComponentManager::CreateInstance(kContentIteratorCID,
nsnull,
NS_GET_IID(nsIContentIterator),
getter_AddRefs(mIter));
if (NS_FAILED(res)) return res;
return mIter->Init(aRange);
}
nsresult
nsDOMIterator::Init(nsIDOMNode* aNode)
{
nsresult res = nsComponentManager::CreateInstance(kContentIteratorCID,
nsnull,
NS_GET_IID(nsIContentIterator),
getter_AddRefs(mIter));
if (NS_FAILED(res)) return res;
nsCOMPtr<nsIContent> content = do_QueryInterface(aNode);
return mIter->Init(content);
}
void
nsDOMIterator::ForEach(nsDomIterFunctor& functor) const
{
nsCOMPtr<nsIContent> content;
nsCOMPtr<nsIDOMNode> node;
nsCOMPtr<nsISupports> isupports;
nsresult res;
// iterate through dom
while (NS_ENUMERATOR_FALSE == mIter->IsDone())
{
res = mIter->CurrentNode(getter_AddRefs(content));
if (NS_FAILED(res)) return;
node = do_QueryInterface(content);
if (!node) return;
functor(node);
res = mIter->Next();
if (NS_FAILED(res)) return;
}
}
nsresult
nsDOMIterator::MakeList(nsBoolDomIterFunctor& functor,
nsCOMPtr<nsISupportsArray> *outArrayOfNodes) const
{
nsCOMPtr<nsIContent> content;
nsCOMPtr<nsIDOMNode> node;
nsCOMPtr<nsISupports> isupports;
nsresult res;
// make a array
res = NS_NewISupportsArray(getter_AddRefs(*outArrayOfNodes));
if (NS_FAILED(res)) return res;
return AppendList(functor, *outArrayOfNodes);
}
nsresult
nsDOMIterator::AppendList(nsBoolDomIterFunctor& functor,
nsCOMPtr<nsISupportsArray> arrayOfNodes) const
{
if (!arrayOfNodes) return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIContent> content;
nsCOMPtr<nsIDOMNode> node;
nsCOMPtr<nsISupports> isupports;
nsresult res;
// iterate through dom and build list
while (NS_ENUMERATOR_FALSE == mIter->IsDone())
{
res = mIter->CurrentNode(getter_AddRefs(content));
if (NS_FAILED(res)) return res;
node = do_QueryInterface(content);
if (!node) return NS_ERROR_NULL_POINTER;
if (functor(node))
{
isupports = do_QueryInterface(node);
arrayOfNodes->AppendElement(isupports);
}
res = mIter->Next();
if (NS_FAILED(res)) return res;
}
return NS_OK;
}
nsDOMSubtreeIterator::nsDOMSubtreeIterator()
{
}
nsDOMSubtreeIterator::~nsDOMSubtreeIterator()
{
}
nsresult
nsDOMSubtreeIterator::Init(nsIDOMRange* aRange)
{
nsresult res = nsComponentManager::CreateInstance(kSubtreeIteratorCID,
nsnull,
NS_GET_IID(nsIContentIterator),
getter_AddRefs(mIter));
if (NS_FAILED(res)) return res;
return mIter->Init(aRange);
}
nsresult
nsDOMSubtreeIterator::Init(nsIDOMNode* aNode)
{
nsresult res = nsComponentManager::CreateInstance(kSubtreeIteratorCID,
nsnull,
NS_GET_IID(nsIContentIterator),
getter_AddRefs(mIter));
if (NS_FAILED(res)) return res;
nsCOMPtr<nsIContent> content = do_QueryInterface(aNode);
return mIter->Init(content);
}