/* -*- 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(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 = mEditorBase->GetSelection(); NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER); DebugOnly 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 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