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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 "CreateElementTransaction.h"
#include <algorithm>
#include <stdio.h>
#include "mozilla/dom/Element.h"
#include "mozilla/dom/Selection.h"
#include "mozilla/Casting.h"
#include "mozilla/EditorBase.h"
#include "nsAlgorithm.h"
#include "nsAString.h"
#include "nsDebug.h"
#include "nsError.h"
#include "nsIContent.h"
#include "nsIDOMCharacterData.h"
#include "nsIEditor.h"
#include "nsINode.h"
#include "nsISupportsUtils.h"
#include "nsMemory.h"
#include "nsReadableUtils.h"
#include "nsStringFwd.h"
#include "nsString.h"
namespace mozilla {
using namespace dom;
CreateElementTransaction::CreateElementTransaction(EditorBase& aEditorBase,
nsIAtom& aTag,
nsINode& aParent,
int32_t aOffsetInParent)
: EditTransactionBase()
, mEditorBase(&aEditorBase)
, mTag(&aTag)
, mParent(&aParent)
, mOffsetInParent(aOffsetInParent)
{
}
CreateElementTransaction::~CreateElementTransaction()
{
}
NS_IMPL_CYCLE_COLLECTION_INHERITED(CreateElementTransaction,
EditTransactionBase,
mParent,
mNewNode,
mRefNode)
NS_IMPL_ADDREF_INHERITED(CreateElementTransaction, EditTransactionBase)
NS_IMPL_RELEASE_INHERITED(CreateElementTransaction, EditTransactionBase)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(CreateElementTransaction)
NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase)
NS_IMETHODIMP
CreateElementTransaction::DoTransaction()
{
MOZ_ASSERT(mEditorBase && mTag && mParent);
mNewNode = mEditorBase->CreateHTMLContent(mTag);
NS_ENSURE_STATE(mNewNode);
// Try to insert formatting whitespace for the new node:
mEditorBase->MarkNodeDirty(GetAsDOMNode(mNewNode));
// Insert the new node
ErrorResult rv;
if (mOffsetInParent == -1) {
mParent->AppendChild(*mNewNode, rv);
return rv.StealNSResult();
}
mOffsetInParent = std::min(mOffsetInParent,
static_cast<int32_t>(mParent->GetChildCount()));
// Note, it's ok for mRefNode to be null. That means append
mRefNode = mParent->GetChildAt(mOffsetInParent);
nsCOMPtr<nsIContent> refNode = mRefNode;
mParent->InsertBefore(*mNewNode, refNode, rv);
NS_ENSURE_TRUE(!rv.Failed(), rv.StealNSResult());
// Only set selection to insertion point if editor gives permission
if (!mEditorBase->GetShouldTxnSetSelection()) {
// Do nothing - DOM range gravity will adjust selection
return NS_OK;
}
RefPtr<Selection> selection = mEditorBase->GetSelection();
NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
rv = selection->CollapseNative(mParent, mParent->IndexOf(mNewNode) + 1);
NS_ASSERTION(!rv.Failed(),
"selection could not be collapsed after insert");
return NS_OK;
}
NS_IMETHODIMP
CreateElementTransaction::UndoTransaction()
{
MOZ_ASSERT(mEditorBase && mParent);
ErrorResult rv;
mParent->RemoveChild(*mNewNode, rv);
return rv.StealNSResult();
}
NS_IMETHODIMP
CreateElementTransaction::RedoTransaction()
{
MOZ_ASSERT(mEditorBase && mParent);
// First, reset mNewNode so it has no attributes or content
// XXX We never actually did this, we only cleared mNewNode's contents if it
// was a CharacterData node (which it's not, it's an Element)
// Now, reinsert mNewNode
ErrorResult rv;
nsCOMPtr<nsIContent> refNode = mRefNode;
mParent->InsertBefore(*mNewNode, refNode, rv);
return rv.StealNSResult();
}
NS_IMETHODIMP
CreateElementTransaction::GetTxnDescription(nsAString& aString)
{
aString.AssignLiteral("CreateElementTransaction: ");
aString += nsDependentAtomString(mTag);
return NS_OK;
}
already_AddRefed<Element>
CreateElementTransaction::GetNewNode()
{
return nsCOMPtr<Element>(mNewNode).forget();
}
} // namespace mozilla
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