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https://github.com/mozilla/gecko-dev.git
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265e672179
# ignore-this-changeset --HG-- extra : amend_source : 4d301d3b0b8711c4692392aa76088ba7fd7d1022
141 lines
5.0 KiB
C++
141 lines
5.0 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 "InsertNodeTransaction.h"
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#include "mozilla/EditorBase.h" // for EditorBase
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#include "mozilla/EditorDOMPoint.h" // for EditorDOMPoint
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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 "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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namespace mozilla {
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using namespace dom;
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template already_AddRefed<InsertNodeTransaction> InsertNodeTransaction::Create(
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EditorBase& aEditorBase, nsIContent& aContentToInsert,
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const EditorDOMPoint& aPointToInsert);
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template already_AddRefed<InsertNodeTransaction> InsertNodeTransaction::Create(
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EditorBase& aEditorBase, nsIContent& aContentToInsert,
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const EditorRawDOMPoint& aPointToInsert);
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// static
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template <typename PT, typename CT>
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already_AddRefed<InsertNodeTransaction> InsertNodeTransaction::Create(
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EditorBase& aEditorBase, nsIContent& aContentToInsert,
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const EditorDOMPointBase<PT, CT>& aPointToInsert) {
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RefPtr<InsertNodeTransaction> transaction =
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new InsertNodeTransaction(aEditorBase, aContentToInsert, aPointToInsert);
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return transaction.forget();
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}
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template <typename PT, typename CT>
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InsertNodeTransaction::InsertNodeTransaction(
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EditorBase& aEditorBase, nsIContent& aContentToInsert,
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const EditorDOMPointBase<PT, CT>& aPointToInsert)
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: mContentToInsert(&aContentToInsert),
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mPointToInsert(aPointToInsert),
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mEditorBase(&aEditorBase) {
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MOZ_ASSERT(mPointToInsert.IsSetAndValid());
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// Ensure mPointToInsert stores child at offset.
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Unused << mPointToInsert.GetChild();
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}
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InsertNodeTransaction::~InsertNodeTransaction() {}
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NS_IMPL_CYCLE_COLLECTION_INHERITED(InsertNodeTransaction, EditTransactionBase,
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mEditorBase, mContentToInsert,
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mPointToInsert)
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NS_IMPL_ADDREF_INHERITED(InsertNodeTransaction, EditTransactionBase)
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NS_IMPL_RELEASE_INHERITED(InsertNodeTransaction, EditTransactionBase)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(InsertNodeTransaction)
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NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase)
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NS_IMETHODIMP
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InsertNodeTransaction::DoTransaction() {
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if (NS_WARN_IF(!mEditorBase) || NS_WARN_IF(!mContentToInsert) ||
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NS_WARN_IF(!mPointToInsert.IsSet())) {
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return NS_ERROR_NOT_INITIALIZED;
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}
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if (!mPointToInsert.IsSetAndValid()) {
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// It seems that DOM tree has been changed after first DoTransaction()
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// and current RedoTranaction() call.
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if (mPointToInsert.GetChild()) {
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EditorDOMPoint newPointToInsert(mPointToInsert.GetChild());
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if (!newPointToInsert.IsSet()) {
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// The insertion point has been removed from the DOM tree.
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// In this case, we should append the node to the container instead.
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newPointToInsert.SetToEndOf(mPointToInsert.GetContainer());
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if (NS_WARN_IF(!newPointToInsert.IsSet())) {
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return NS_ERROR_FAILURE;
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}
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}
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mPointToInsert = newPointToInsert;
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} else {
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mPointToInsert.SetToEndOf(mPointToInsert.GetContainer());
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if (NS_WARN_IF(!mPointToInsert.IsSet())) {
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return NS_ERROR_FAILURE;
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}
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}
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}
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mEditorBase->MarkNodeDirty(mContentToInsert);
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ErrorResult error;
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mPointToInsert.GetContainer()->InsertBefore(*mContentToInsert,
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mPointToInsert.GetChild(), error);
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error.WouldReportJSException();
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if (NS_WARN_IF(error.Failed())) {
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return error.StealNSResult();
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}
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if (!mEditorBase->AllowsTransactionsToChangeSelection()) {
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return NS_OK;
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}
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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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// Place the selection just after the inserted element.
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EditorRawDOMPoint afterInsertedNode(mContentToInsert);
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DebugOnly<bool> advanced = afterInsertedNode.AdvanceOffset();
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NS_WARNING_ASSERTION(advanced,
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"Failed to advance offset after the inserted node");
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selection->Collapse(afterInsertedNode, error);
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if (NS_WARN_IF(error.Failed())) {
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error.SuppressException();
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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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InsertNodeTransaction::UndoTransaction() {
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if (NS_WARN_IF(!mContentToInsert) || NS_WARN_IF(!mPointToInsert.IsSet())) {
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return NS_ERROR_NOT_INITIALIZED;
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}
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// XXX If the inserted node has been moved to different container node or
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// just removed from the DOM tree, this always fails.
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ErrorResult error;
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mPointToInsert.GetContainer()->RemoveChild(*mContentToInsert, error);
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if (NS_WARN_IF(error.Failed())) {
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return error.StealNSResult();
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}
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return NS_OK;
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}
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} // namespace mozilla
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