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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 "InsertTextTransaction.h"
#include "mozilla/EditorBase.h" // mEditorBase
#include "mozilla/SelectionState.h" // RangeUpdater
#include "mozilla/dom/Selection.h" // Selection local var
#include "mozilla/dom/Text.h" // mTextNode
#include "nsAString.h" // nsAString parameter
#include "nsDebug.h" // for NS_ASSERTION, etc.
#include "nsError.h" // for NS_OK, etc.
#include "nsQueryObject.h" // for do_QueryObject
namespace mozilla {
using namespace dom;
InsertTextTransaction::InsertTextTransaction(Text& aTextNode,
uint32_t aOffset,
const nsAString& aStringToInsert,
EditorBase& aEditorBase,
RangeUpdater* aRangeUpdater)
: mTextNode(&aTextNode)
, mOffset(aOffset)
, mStringToInsert(aStringToInsert)
, mEditorBase(&aEditorBase)
, mRangeUpdater(aRangeUpdater)
{
}
InsertTextTransaction::~InsertTextTransaction()
{
}
NS_IMPL_CYCLE_COLLECTION_INHERITED(InsertTextTransaction, EditTransactionBase,
mEditorBase,
mTextNode)
NS_IMPL_ADDREF_INHERITED(InsertTextTransaction, EditTransactionBase)
NS_IMPL_RELEASE_INHERITED(InsertTextTransaction, EditTransactionBase)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(InsertTextTransaction)
if (aIID.Equals(NS_GET_IID(InsertTextTransaction))) {
foundInterface = static_cast<nsITransaction*>(this);
} else
NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase)
NS_IMETHODIMP
InsertTextTransaction::DoTransaction()
{
if (NS_WARN_IF(!mEditorBase) || NS_WARN_IF(!mTextNode)) {
return NS_ERROR_NOT_AVAILABLE;
}
nsresult rv = mTextNode->InsertData(mOffset, mStringToInsert);
NS_ENSURE_SUCCESS(rv, rv);
// 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);
DebugOnly<nsresult> rv =
selection->Collapse(mTextNode, mOffset + mStringToInsert.Length());
NS_ASSERTION(NS_SUCCEEDED(rv),
"Selection could not be collapsed after insert");
} else {
// Do nothing - DOM Range gravity will adjust selection
}
mRangeUpdater->SelAdjInsertText(*mTextNode, mOffset, mStringToInsert);
return NS_OK;
}
NS_IMETHODIMP
InsertTextTransaction::UndoTransaction()
{
return mTextNode->DeleteData(mOffset, mStringToInsert.Length());
}
NS_IMETHODIMP
InsertTextTransaction::Merge(nsITransaction* aTransaction,
bool* aDidMerge)
{
if (!aTransaction || !aDidMerge) {
return NS_OK;
}
// Set out param default value
*aDidMerge = false;
// If aTransaction is a InsertTextTransaction, and if the selection hasn't
// changed, then absorb it.
RefPtr<InsertTextTransaction> otherTransaction = do_QueryObject(aTransaction);
if (otherTransaction && IsSequentialInsert(*otherTransaction)) {
nsAutoString otherData;
otherTransaction->GetData(otherData);
mStringToInsert += otherData;
*aDidMerge = true;
}
return NS_OK;
}
NS_IMETHODIMP
InsertTextTransaction::GetTxnDescription(nsAString& aString)
{
aString.AssignLiteral("InsertTextTransaction: ");
aString += mStringToInsert;
return NS_OK;
}
/* ============ private methods ================== */
void
InsertTextTransaction::GetData(nsString& aResult)
{
aResult = mStringToInsert;
}
bool
InsertTextTransaction::IsSequentialInsert(
InsertTextTransaction& aOtherTransaction)
{
return aOtherTransaction.mTextNode == mTextNode &&
aOtherTransaction.mOffset == mOffset + mStringToInsert.Length();
}
} // namespace mozilla
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