131 lines
4.1 KiB
C++
131 lines
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "InsertTextTransaction.h"
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#include "mozilla/EditorBase.h" // mEditorBase
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#include "mozilla/SelectionState.h" // RangeUpdater
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#include "mozilla/dom/Selection.h" // Selection local var
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#include "mozilla/dom/Text.h" // mTextNode
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#include "nsAString.h" // nsAString parameter
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#include "nsDebug.h" // for NS_ASSERTION, etc.
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#include "nsError.h" // for NS_OK, etc.
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#include "nsQueryObject.h" // for do_QueryObject
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namespace mozilla {
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using namespace dom;
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InsertTextTransaction::InsertTextTransaction(Text& aTextNode,
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uint32_t aOffset,
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const nsAString& aStringToInsert,
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EditorBase& aEditorBase,
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RangeUpdater* aRangeUpdater)
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: mTextNode(&aTextNode)
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, mOffset(aOffset)
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, mStringToInsert(aStringToInsert)
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, mEditorBase(&aEditorBase)
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, mRangeUpdater(aRangeUpdater)
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{
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}
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InsertTextTransaction::~InsertTextTransaction()
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{
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}
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NS_IMPL_CYCLE_COLLECTION_INHERITED(InsertTextTransaction, EditTransactionBase,
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mEditorBase,
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mTextNode)
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NS_IMPL_ADDREF_INHERITED(InsertTextTransaction, EditTransactionBase)
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NS_IMPL_RELEASE_INHERITED(InsertTextTransaction, EditTransactionBase)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(InsertTextTransaction)
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if (aIID.Equals(NS_GET_IID(InsertTextTransaction))) {
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foundInterface = static_cast<nsITransaction*>(this);
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} else
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NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase)
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NS_IMETHODIMP
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InsertTextTransaction::DoTransaction()
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{
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if (NS_WARN_IF(!mEditorBase) || NS_WARN_IF(!mTextNode)) {
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return NS_ERROR_NOT_AVAILABLE;
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}
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nsresult rv = mTextNode->InsertData(mOffset, mStringToInsert);
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NS_ENSURE_SUCCESS(rv, rv);
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// Only set selection to insertion point if editor gives permission
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if (mEditorBase->GetShouldTxnSetSelection()) {
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RefPtr<Selection> selection = mEditorBase->GetSelection();
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NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
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DebugOnly<nsresult> rv =
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selection->Collapse(mTextNode, mOffset + mStringToInsert.Length());
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NS_ASSERTION(NS_SUCCEEDED(rv),
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"Selection could not be collapsed after insert");
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} else {
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// Do nothing - DOM Range gravity will adjust selection
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}
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mRangeUpdater->SelAdjInsertText(*mTextNode, mOffset, mStringToInsert);
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return NS_OK;
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}
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NS_IMETHODIMP
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InsertTextTransaction::UndoTransaction()
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{
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return mTextNode->DeleteData(mOffset, mStringToInsert.Length());
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}
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NS_IMETHODIMP
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InsertTextTransaction::Merge(nsITransaction* aTransaction,
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bool* aDidMerge)
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{
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if (!aTransaction || !aDidMerge) {
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return NS_OK;
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}
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// Set out param default value
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*aDidMerge = false;
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// If aTransaction is a InsertTextTransaction, and if the selection hasn't
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// changed, then absorb it.
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RefPtr<InsertTextTransaction> otherTransaction = do_QueryObject(aTransaction);
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if (otherTransaction && IsSequentialInsert(*otherTransaction)) {
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nsAutoString otherData;
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otherTransaction->GetData(otherData);
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mStringToInsert += otherData;
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*aDidMerge = true;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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InsertTextTransaction::GetTxnDescription(nsAString& aString)
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{
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aString.AssignLiteral("InsertTextTransaction: ");
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aString += mStringToInsert;
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return NS_OK;
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}
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/* ============ private methods ================== */
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void
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InsertTextTransaction::GetData(nsString& aResult)
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{
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aResult = mStringToInsert;
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}
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bool
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InsertTextTransaction::IsSequentialInsert(
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InsertTextTransaction& aOtherTransaction)
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{
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return aOtherTransaction.mTextNode == mTextNode &&
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aOtherTransaction.mOffset == mOffset + mStringToInsert.Length();
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}
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} // namespace mozilla
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