зеркало из https://github.com/mozilla/gecko-dev.git
123 строки
4.2 KiB
C++
123 строки
4.2 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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// static
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already_AddRefed<InsertTextTransaction> InsertTextTransaction::Create(
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EditorBase& aEditorBase, const nsAString& aStringToInsert, Text& aTextNode,
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uint32_t aOffset) {
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RefPtr<InsertTextTransaction> transaction = new InsertTextTransaction(
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aEditorBase, aStringToInsert, aTextNode, aOffset);
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return transaction.forget();
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}
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InsertTextTransaction::InsertTextTransaction(EditorBase& aEditorBase,
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const nsAString& aStringToInsert,
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Text& aTextNode, uint32_t aOffset)
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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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InsertTextTransaction::~InsertTextTransaction() {}
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NS_IMPL_CYCLE_COLLECTION_INHERITED(InsertTextTransaction, EditTransactionBase,
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mEditorBase, 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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NS_INTERFACE_MAP_ENTRY_CONCRETE(InsertTextTransaction)
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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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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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ErrorResult rv;
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mTextNode->InsertData(mOffset, mStringToInsert, rv);
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if (NS_WARN_IF(rv.Failed())) {
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return rv.StealNSResult();
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}
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// Only set selection to insertion point if editor gives permission
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if (mEditorBase->AllowsTransactionsToChangeSelection()) {
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RefPtr<Selection> selection = mEditorBase->GetSelection();
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if (NS_WARN_IF(!selection)) {
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return NS_ERROR_FAILURE;
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}
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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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// XXX Other transactions do not do this but its callers do.
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// Why do this transaction do this by itself?
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mEditorBase->RangeUpdaterRef().SelAdjInsertText(*mTextNode, mOffset,
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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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ErrorResult rv;
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mTextNode->DeleteData(mOffset, mStringToInsert.Length(), rv);
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return rv.StealNSResult();
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}
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NS_IMETHODIMP
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InsertTextTransaction::Merge(nsITransaction* aTransaction, bool* aDidMerge) {
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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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/* ============ private methods ================== */
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void InsertTextTransaction::GetData(nsString& aResult) {
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aResult = mStringToInsert;
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}
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bool InsertTextTransaction::IsSequentialInsert(
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InsertTextTransaction& aOtherTransaction) {
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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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