mirror of
https://github.com/mozilla/gecko-dev.git
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116 lines
3.2 KiB
C++
116 lines
3.2 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 "InsertTextTxn.h"
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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 "nsEditor.h" // mEditor
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#include "nsError.h" // for NS_OK, etc
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using namespace mozilla;
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using namespace mozilla::dom;
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class nsITransaction;
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InsertTextTxn::InsertTextTxn(Text& aTextNode, uint32_t aOffset,
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const nsAString& aStringToInsert,
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nsEditor& aEditor)
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: EditTxn()
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, mTextNode(&aTextNode)
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, mOffset(aOffset)
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, mStringToInsert(aStringToInsert)
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, mEditor(aEditor)
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{
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}
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InsertTextTxn::~InsertTextTxn()
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{
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}
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NS_IMPL_CYCLE_COLLECTION_INHERITED(InsertTextTxn, EditTxn,
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mTextNode)
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NS_IMPL_ADDREF_INHERITED(InsertTextTxn, EditTxn)
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NS_IMPL_RELEASE_INHERITED(InsertTextTxn, EditTxn)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(InsertTextTxn)
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsITransaction, InsertTextTxn)
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NS_INTERFACE_MAP_END_INHERITING(EditTxn)
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NS_IMETHODIMP
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InsertTextTxn::DoTransaction()
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{
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nsresult res = mTextNode->InsertData(mOffset, mStringToInsert);
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NS_ENSURE_SUCCESS(res, res);
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// Only set selection to insertion point if editor gives permission
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if (mEditor.GetShouldTxnSetSelection()) {
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nsRefPtr<Selection> selection = mEditor.GetSelection();
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NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
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res = selection->Collapse(mTextNode,
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mOffset + mStringToInsert.Length());
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NS_ASSERTION(NS_SUCCEEDED(res),
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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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return NS_OK;
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}
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NS_IMETHODIMP
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InsertTextTxn::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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InsertTextTxn::Merge(nsITransaction* aTransaction, 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 InsertTextTxn, and if the selection hasn't changed,
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// then absorb it
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nsRefPtr<InsertTextTxn> otherInsTxn = do_QueryObject(aTransaction);
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if (otherInsTxn && IsSequentialInsert(*otherInsTxn)) {
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nsAutoString otherData;
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otherInsTxn->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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InsertTextTxn::GetTxnDescription(nsAString& aString)
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{
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aString.AssignLiteral("InsertTextTxn: ");
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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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InsertTextTxn::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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InsertTextTxn::IsSequentialInsert(InsertTextTxn& aOtherTxn)
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{
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return aOtherTxn.mTextNode == mTextNode &&
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aOtherTxn.mOffset == mOffset + mStringToInsert.Length();
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}
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