зеркало из https://github.com/mozilla/gecko-dev.git
93 строки
2.7 KiB
C++
93 строки
2.7 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 "InsertNodeTxn.h"
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#include "mozilla/dom/Selection.h" // for Selection
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#include "nsAString.h"
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#include "nsDebug.h" // for NS_ENSURE_TRUE, etc
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#include "nsEditor.h" // for nsEditor
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#include "nsError.h" // for NS_ERROR_NULL_POINTER, etc
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#include "nsIContent.h" // for nsIContent
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#include "nsMemory.h" // for nsMemory
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#include "nsReadableUtils.h" // for ToNewCString
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#include "nsString.h" // for nsString
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using namespace mozilla;
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using namespace mozilla::dom;
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InsertNodeTxn::InsertNodeTxn(nsIContent& aNode, nsINode& aParent,
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int32_t aOffset, nsEditor& aEditor)
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: EditTxn()
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, mNode(&aNode)
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, mParent(&aParent)
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, mOffset(aOffset)
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, mEditor(aEditor)
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{
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}
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InsertNodeTxn::~InsertNodeTxn()
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{
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}
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NS_IMPL_CYCLE_COLLECTION_INHERITED(InsertNodeTxn, EditTxn,
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mNode,
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mParent)
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NS_IMPL_ADDREF_INHERITED(InsertNodeTxn, EditTxn)
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NS_IMPL_RELEASE_INHERITED(InsertNodeTxn, EditTxn)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(InsertNodeTxn)
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NS_INTERFACE_MAP_END_INHERITING(EditTxn)
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NS_IMETHODIMP
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InsertNodeTxn::DoTransaction()
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{
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MOZ_ASSERT(mNode && mParent);
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uint32_t count = mParent->GetChildCount();
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if (mOffset > static_cast<int32_t>(count) || mOffset == -1) {
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// -1 is sentinel value meaning "append at end"
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mOffset = count;
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}
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// Note, it's ok for ref to be null. That means append.
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nsCOMPtr<nsIContent> ref = mParent->GetChildAt(mOffset);
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mEditor.MarkNodeDirty(GetAsDOMNode(mNode));
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ErrorResult rv;
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mParent->InsertBefore(*mNode, ref, rv);
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NS_ENSURE_SUCCESS(rv.ErrorCode(), rv.ErrorCode());
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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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// Place the selection just after the inserted element
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selection->Collapse(mParent, mOffset + 1);
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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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InsertNodeTxn::UndoTransaction()
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{
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MOZ_ASSERT(mNode && mParent);
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ErrorResult rv;
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mParent->RemoveChild(*mNode, rv);
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return rv.ErrorCode();
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}
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NS_IMETHODIMP
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InsertNodeTxn::GetTxnDescription(nsAString& aString)
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{
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aString.AssignLiteral("InsertNodeTxn");
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return NS_OK;
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}
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