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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "InsertNodeTransaction.h"
#include "mozilla/EditorBase.h" // for EditorBase
#include "mozilla/dom/Selection.h" // for Selection
#include "nsAString.h"
#include "nsDebug.h" // for NS_ENSURE_TRUE, etc.
#include "nsError.h" // for NS_ERROR_NULL_POINTER, etc.
#include "nsIContent.h" // for nsIContent
#include "nsMemory.h" // for nsMemory
#include "nsReadableUtils.h" // for ToNewCString
#include "nsString.h" // for nsString
namespace mozilla {
using namespace dom;
InsertNodeTransaction::InsertNodeTransaction(nsIContent& aNode,
nsINode& aParent,
int32_t aOffset,
EditorBase& aEditorBase)
: mNode(&aNode)
, mParent(&aParent)
, mOffset(aOffset)
, mEditorBase(aEditorBase)
{
}
InsertNodeTransaction::~InsertNodeTransaction()
{
}
NS_IMPL_CYCLE_COLLECTION_INHERITED(InsertNodeTransaction, EditTransactionBase,
mNode,
mParent)
NS_IMPL_ADDREF_INHERITED(InsertNodeTransaction, EditTransactionBase)
NS_IMPL_RELEASE_INHERITED(InsertNodeTransaction, EditTransactionBase)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(InsertNodeTransaction)
NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase)
NS_IMETHODIMP
InsertNodeTransaction::DoTransaction()
{
MOZ_ASSERT(mNode && mParent);
uint32_t count = mParent->GetChildCount();
if (mOffset > static_cast<int32_t>(count) || mOffset == -1) {
// -1 is sentinel value meaning "append at end"
mOffset = count;
}
// Note, it's ok for ref to be null. That means append.
nsCOMPtr<nsIContent> ref = mParent->GetChildAt(mOffset);
mEditorBase.MarkNodeDirty(GetAsDOMNode(mNode));
ErrorResult rv;
mParent->InsertBefore(*mNode, ref, rv);
NS_ENSURE_TRUE(!rv.Failed(), rv.StealNSResult());
// Only set selection to insertion point if editor gives permission
if (mEditorBase.GetShouldTxnSetSelection()) {
RefPtr<Selection> selection = mEditorBase.GetSelection();
NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
// Place the selection just after the inserted element
selection->Collapse(mParent, mOffset + 1);
} else {
// Do nothing - DOM Range gravity will adjust selection
}
return NS_OK;
}
NS_IMETHODIMP
InsertNodeTransaction::UndoTransaction()
{
MOZ_ASSERT(mNode && mParent);
ErrorResult rv;
mParent->RemoveChild(*mNode, rv);
return rv.StealNSResult();
}
NS_IMETHODIMP
InsertNodeTransaction::GetTxnDescription(nsAString& aString)
{
aString.AssignLiteral("InsertNodeTransaction");
return NS_OK;
}
} // namespace mozilla
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