144 lines
3.8 KiB
C++
144 lines
3.8 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 "CreateElementTxn.h"
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#include <algorithm>
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#include <stdio.h>
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/Selection.h"
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#include "mozilla/Casting.h"
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#include "nsAlgorithm.h"
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#include "nsAString.h"
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#include "nsDebug.h"
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#include "nsEditor.h"
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#include "nsError.h"
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#include "nsIContent.h"
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#include "nsIDOMCharacterData.h"
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#include "nsIEditor.h"
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#include "nsINode.h"
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#include "nsISupportsUtils.h"
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#include "nsMemory.h"
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#include "nsReadableUtils.h"
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#include "nsStringFwd.h"
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#include "nsString.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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CreateElementTxn::CreateElementTxn(nsEditor& aEditor,
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nsIAtom& aTag,
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nsINode& aParent,
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int32_t aOffsetInParent)
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: EditTxn()
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, mEditor(&aEditor)
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, mTag(&aTag)
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, mParent(&aParent)
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, mOffsetInParent(aOffsetInParent)
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{
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}
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CreateElementTxn::~CreateElementTxn()
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{
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}
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NS_IMPL_CYCLE_COLLECTION_INHERITED(CreateElementTxn, EditTxn,
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mParent,
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mNewNode,
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mRefNode)
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NS_IMPL_ADDREF_INHERITED(CreateElementTxn, EditTxn)
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NS_IMPL_RELEASE_INHERITED(CreateElementTxn, EditTxn)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(CreateElementTxn)
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NS_INTERFACE_MAP_END_INHERITING(EditTxn)
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NS_IMETHODIMP
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CreateElementTxn::DoTransaction()
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{
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MOZ_ASSERT(mEditor && mTag && mParent);
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mNewNode = mEditor->CreateHTMLContent(mTag);
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NS_ENSURE_STATE(mNewNode);
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// Try to insert formatting whitespace for the new node:
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mEditor->MarkNodeDirty(GetAsDOMNode(mNewNode));
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// Insert the new node
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ErrorResult rv;
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if (mOffsetInParent == -1) {
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mParent->AppendChild(*mNewNode, rv);
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return rv.StealNSResult();
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}
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mOffsetInParent = std::min(mOffsetInParent,
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static_cast<int32_t>(mParent->GetChildCount()));
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// Note, it's ok for mRefNode to be null. That means append
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mRefNode = mParent->GetChildAt(mOffsetInParent);
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nsCOMPtr<nsIContent> refNode = mRefNode;
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mParent->InsertBefore(*mNewNode, refNode, rv);
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NS_ENSURE_TRUE(!rv.Failed(), rv.StealNSResult());
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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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// Do nothing - DOM range gravity will adjust selection
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return NS_OK;
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}
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RefPtr<Selection> selection = mEditor->GetSelection();
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NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
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rv = selection->CollapseNative(mParent, mParent->IndexOf(mNewNode) + 1);
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NS_ASSERTION(!rv.Failed(),
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"selection could not be collapsed after insert");
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return NS_OK;
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}
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NS_IMETHODIMP
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CreateElementTxn::UndoTransaction()
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{
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MOZ_ASSERT(mEditor && mParent);
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ErrorResult rv;
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mParent->RemoveChild(*mNewNode, rv);
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return rv.StealNSResult();
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}
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NS_IMETHODIMP
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CreateElementTxn::RedoTransaction()
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{
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MOZ_ASSERT(mEditor && mParent);
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// First, reset mNewNode so it has no attributes or content
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// XXX We never actually did this, we only cleared mNewNode's contents if it
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// was a CharacterData node (which it's not, it's an Element)
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// Now, reinsert mNewNode
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ErrorResult rv;
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nsCOMPtr<nsIContent> refNode = mRefNode;
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mParent->InsertBefore(*mNewNode, refNode, rv);
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return rv.StealNSResult();
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}
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NS_IMETHODIMP
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CreateElementTxn::GetTxnDescription(nsAString& aString)
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{
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aString.AssignLiteral("CreateElementTxn: ");
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aString += nsDependentAtomString(mTag);
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return NS_OK;
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}
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already_AddRefed<Element>
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CreateElementTxn::GetNewNode()
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{
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return nsCOMPtr<Element>(mNewNode).forget();
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}
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