mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-05 16:46:26 +00:00
363 lines
10 KiB
C++
363 lines
10 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 1.0 (the "NPL"); you may not use this file except in
|
|
* compliance with the NPL. You may obtain a copy of the NPL at
|
|
* http://www.mozilla.org/NPL/
|
|
*
|
|
* Software distributed under the NPL is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
|
|
* for the specific language governing rights and limitations under the
|
|
* NPL.
|
|
*
|
|
* The Initial Developer of this code under the NPL is Netscape
|
|
* Communications Corporation. Portions created by Netscape are
|
|
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
|
|
* Reserved.
|
|
*/
|
|
|
|
#include "DeleteRangeTxn.h"
|
|
#include "nsIDOMRange.h"
|
|
#include "nsIDOMCharacterData.h"
|
|
#include "nsIDOMNodeList.h"
|
|
#include "nsIDOMSelection.h"
|
|
#include "DeleteTextTxn.h"
|
|
#include "DeleteElementTxn.h"
|
|
#include "TransactionFactory.h"
|
|
#include "nsIContentIterator.h"
|
|
#include "nsIContent.h"
|
|
#include "nsLayoutCID.h"
|
|
|
|
#ifdef NS_DEBUG
|
|
#include "nsIDOMElement.h"
|
|
#endif
|
|
|
|
static NS_DEFINE_IID(kDeleteTextTxnIID, DELETE_TEXT_TXN_IID);
|
|
static NS_DEFINE_IID(kDeleteElementTxnIID, DELETE_ELEMENT_TXN_IID);
|
|
|
|
#ifdef NS_DEBUG
|
|
static PRBool gNoisy = PR_FALSE;
|
|
#else
|
|
static const PRBool gNoisy = PR_FALSE;
|
|
#endif
|
|
|
|
// note that aEditor is not refcounted
|
|
DeleteRangeTxn::DeleteRangeTxn()
|
|
: EditAggregateTxn()
|
|
{
|
|
}
|
|
|
|
NS_IMETHODIMP DeleteRangeTxn::Init(nsIEditor *aEditor, nsIDOMRange *aRange)
|
|
{
|
|
if (aEditor && aRange)
|
|
{
|
|
mEditor = do_QueryInterface(aEditor);
|
|
mRange = do_QueryInterface(aRange);
|
|
|
|
nsresult result = aRange->GetStartParent(getter_AddRefs(mStartParent));
|
|
NS_ASSERTION((NS_SUCCEEDED(result)), "GetStartParent failed.");
|
|
result = aRange->GetEndParent(getter_AddRefs(mEndParent));
|
|
NS_ASSERTION((NS_SUCCEEDED(result)), "GetEndParent failed.");
|
|
result = aRange->GetStartOffset(&mStartOffset);
|
|
NS_ASSERTION((NS_SUCCEEDED(result)), "GetStartOffset failed.");
|
|
result = aRange->GetEndOffset(&mEndOffset);
|
|
NS_ASSERTION((NS_SUCCEEDED(result)), "GetEndOffset failed.");
|
|
result = aRange->GetCommonParent(getter_AddRefs(mCommonParent));
|
|
NS_ASSERTION((NS_SUCCEEDED(result)), "GetCommonParent failed.");
|
|
|
|
#ifdef NS_DEBUG
|
|
{
|
|
PRUint32 count;
|
|
nsCOMPtr<nsIDOMCharacterData> textNode;
|
|
textNode = do_QueryInterface(mStartParent, &result);
|
|
if (textNode)
|
|
textNode->GetLength(&count);
|
|
else
|
|
{
|
|
nsCOMPtr<nsIDOMNodeList> children;
|
|
result = mStartParent->GetChildNodes(getter_AddRefs(children));
|
|
NS_ASSERTION(((NS_SUCCEEDED(result)) && children), "bad start child list");
|
|
children->GetLength(&count);
|
|
}
|
|
NS_ASSERTION(mStartOffset<=(PRInt32)count, "bad start offset");
|
|
|
|
textNode = do_QueryInterface(mEndParent, &result);
|
|
if (textNode)
|
|
textNode->GetLength(&count);
|
|
else
|
|
{
|
|
nsCOMPtr<nsIDOMNodeList> children;
|
|
result = mEndParent->GetChildNodes(getter_AddRefs(children));
|
|
NS_ASSERTION(((NS_SUCCEEDED(result)) && children), "bad end child list");
|
|
children->GetLength(&count);
|
|
}
|
|
NS_ASSERTION(mEndOffset<=(PRInt32)count, "bad end offset");
|
|
if (gNoisy)
|
|
{
|
|
printf ("DeleteRange: %d of %p to %d of %p\n",
|
|
mStartOffset, (void *)mStartParent, mEndOffset, (void *)mEndParent);
|
|
}
|
|
}
|
|
#endif
|
|
return result;
|
|
}
|
|
else
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
DeleteRangeTxn::~DeleteRangeTxn()
|
|
{
|
|
}
|
|
|
|
NS_IMETHODIMP DeleteRangeTxn::Do(void)
|
|
{
|
|
if (!mStartParent || !mEndParent || !mCommonParent)
|
|
return NS_ERROR_NULL_POINTER;
|
|
|
|
nsresult result;
|
|
|
|
// build the child transactions
|
|
|
|
if (mStartParent==mEndParent)
|
|
{ // the selection begins and ends in the same node
|
|
result = CreateTxnsToDeleteBetween(mStartParent, mStartOffset, mEndOffset);
|
|
}
|
|
else
|
|
{ // the selection ends in a different node from where it started
|
|
// delete the relevant content in the start node
|
|
result = CreateTxnsToDeleteContent(mStartParent, mStartOffset, nsIEditor::eLTR);
|
|
if (NS_SUCCEEDED(result))
|
|
{
|
|
// delete the intervening nodes
|
|
result = CreateTxnsToDeleteNodesBetween();
|
|
if (NS_SUCCEEDED(result))
|
|
{
|
|
// delete the relevant content in the end node
|
|
result = CreateTxnsToDeleteContent(mEndParent, mEndOffset, nsIEditor::eRTL);
|
|
}
|
|
}
|
|
}
|
|
|
|
// if we've successfully built this aggregate transaction, then do it.
|
|
if (NS_SUCCEEDED(result)) {
|
|
result = EditAggregateTxn::Do();
|
|
}
|
|
|
|
if (NS_SUCCEEDED(result)) {
|
|
// set the resulting selection
|
|
nsCOMPtr<nsIDOMSelection> selection;
|
|
result = mEditor->GetSelection(getter_AddRefs(selection));
|
|
if (NS_SUCCEEDED(result)) {
|
|
result = selection->Collapse(mStartParent, mStartOffset);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
NS_IMETHODIMP DeleteRangeTxn::Undo(void)
|
|
{
|
|
if (!mStartParent || !mEndParent || !mCommonParent)
|
|
return NS_ERROR_NULL_POINTER;
|
|
|
|
nsresult result = EditAggregateTxn::Undo();
|
|
|
|
if (NS_SUCCEEDED(result)) {
|
|
// set the resulting selection
|
|
nsCOMPtr<nsIDOMSelection> selection;
|
|
result = mEditor->GetSelection(getter_AddRefs(selection));
|
|
if (NS_SUCCEEDED(result)) {
|
|
result = selection->Collapse(mStartParent, mStartOffset);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
NS_IMETHODIMP DeleteRangeTxn::Redo(void)
|
|
{
|
|
if (!mStartParent || !mEndParent || !mCommonParent)
|
|
return NS_ERROR_NULL_POINTER;
|
|
|
|
nsresult result = EditAggregateTxn::Redo();
|
|
|
|
if (NS_SUCCEEDED(result)) {
|
|
// set the resulting selection
|
|
nsCOMPtr<nsIDOMSelection> selection;
|
|
result = mEditor->GetSelection(getter_AddRefs(selection));
|
|
if (NS_SUCCEEDED(result)) {
|
|
result = selection->Collapse(mStartParent, mStartOffset);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
NS_IMETHODIMP DeleteRangeTxn::Merge(PRBool *aDidMerge, nsITransaction *aTransaction)
|
|
{
|
|
if (nsnull!=aDidMerge)
|
|
*aDidMerge=PR_FALSE;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP DeleteRangeTxn::Write(nsIOutputStream *aOutputStream)
|
|
{
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP DeleteRangeTxn::GetUndoString(nsString **aString)
|
|
{
|
|
if (nsnull!=aString)
|
|
{
|
|
**aString="Insert Range: ";
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP DeleteRangeTxn::GetRedoString(nsString **aString)
|
|
{
|
|
if (nsnull!=aString)
|
|
{
|
|
**aString="Remove Range: ";
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP DeleteRangeTxn::CreateTxnsToDeleteBetween(nsIDOMNode *aStartParent,
|
|
PRUint32 aStartOffset,
|
|
PRUint32 aEndOffset)
|
|
{
|
|
nsresult result;
|
|
// see what kind of node we have
|
|
nsCOMPtr<nsIDOMCharacterData> textNode;
|
|
textNode = do_QueryInterface(aStartParent);
|
|
if (textNode)
|
|
{ // if the node is a text node, then delete text content
|
|
DeleteTextTxn *txn;
|
|
result = TransactionFactory::GetNewTransaction(kDeleteTextTxnIID, (EditTxn **)&txn);
|
|
if (nsnull!=txn)
|
|
{
|
|
PRInt32 numToDel;
|
|
if (aStartOffset==aEndOffset)
|
|
numToDel = 1;
|
|
else
|
|
numToDel = aEndOffset-aStartOffset;
|
|
txn->Init(mEditor, textNode, aStartOffset, numToDel);
|
|
AppendChild(txn);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
PRUint32 childCount;
|
|
nsCOMPtr<nsIDOMNodeList> children;
|
|
result = aStartParent->GetChildNodes(getter_AddRefs(children));
|
|
if ((NS_SUCCEEDED(result)) && children)
|
|
{
|
|
children->GetLength(&childCount);
|
|
NS_ASSERTION(aEndOffset<=childCount, "bad aEndOffset");
|
|
PRUint32 i;
|
|
for (i=aStartOffset; i<=aEndOffset; i++)
|
|
{
|
|
nsCOMPtr<nsIDOMNode> child;
|
|
result = children->Item(i, getter_AddRefs(child));
|
|
if ((NS_SUCCEEDED(result)) && child)
|
|
{
|
|
DeleteElementTxn *txn;
|
|
result = TransactionFactory::GetNewTransaction(kDeleteElementTxnIID, (EditTxn **)&txn);
|
|
if (nsnull!=txn)
|
|
{
|
|
txn->Init(child);
|
|
AppendChild(txn);
|
|
}
|
|
else
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
NS_IMETHODIMP DeleteRangeTxn::CreateTxnsToDeleteContent(nsIDOMNode *aParent,
|
|
PRUint32 aOffset,
|
|
nsIEditor::Direction aDir)
|
|
{
|
|
nsresult result;
|
|
// see what kind of node we have
|
|
nsCOMPtr<nsIDOMCharacterData> textNode;
|
|
textNode = do_QueryInterface(aParent);
|
|
if (textNode)
|
|
{ // if the node is a text node, then delete text content
|
|
PRUint32 start, numToDelete;
|
|
if (nsIEditor::eLTR==aDir)
|
|
{
|
|
start=aOffset;
|
|
textNode->GetLength(&numToDelete);
|
|
numToDelete -= aOffset;
|
|
}
|
|
else
|
|
{
|
|
start=0;
|
|
numToDelete=aOffset;
|
|
}
|
|
|
|
if (numToDelete)
|
|
{
|
|
DeleteTextTxn *txn;
|
|
result = TransactionFactory::GetNewTransaction(kDeleteTextTxnIID, (EditTxn **)&txn);
|
|
if (nsnull!=txn)
|
|
{
|
|
txn->Init(mEditor, textNode, start, numToDelete);
|
|
AppendChild(txn);
|
|
}
|
|
else
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static NS_DEFINE_IID(kSubtreeIteratorCID, NS_SUBTREEITERATOR_CID);
|
|
static NS_DEFINE_IID(kRangeCID, NS_RANGE_CID);
|
|
|
|
NS_IMETHODIMP DeleteRangeTxn::CreateTxnsToDeleteNodesBetween()
|
|
{
|
|
nsresult result;
|
|
|
|
nsCOMPtr<nsIContentIterator> iter;
|
|
|
|
result = nsComponentManager::CreateInstance(kSubtreeIteratorCID,
|
|
nsnull,
|
|
nsIContentIterator::GetIID(),
|
|
getter_AddRefs(iter));
|
|
if (!NS_SUCCEEDED(result))
|
|
return result;
|
|
result = iter->Init(mRange);
|
|
if (!NS_SUCCEEDED(result))
|
|
return result;
|
|
|
|
while (NS_COMFALSE == iter->IsDone())
|
|
{
|
|
nsCOMPtr<nsIDOMNode> node;
|
|
nsCOMPtr<nsIContent> content;
|
|
result = iter->CurrentNode(getter_AddRefs(content));
|
|
node = do_QueryInterface(content);
|
|
if ((NS_SUCCEEDED(result)) && node)
|
|
{
|
|
DeleteElementTxn *txn;
|
|
result = TransactionFactory::GetNewTransaction(kDeleteElementTxnIID, (EditTxn **)&txn);
|
|
if (nsnull!=txn)
|
|
{
|
|
txn->Init(node);
|
|
AppendChild(txn);
|
|
}
|
|
else
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
iter->Next();
|
|
}
|
|
return result;
|
|
}
|
|
|