зеркало из https://github.com/mozilla/gecko-dev.git
105 строки
3.2 KiB
C++
105 строки
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 "ChangeAttributeTransaction.h"
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#include "mozilla/dom/Element.h" // for Element
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#include "nsAString.h"
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#include "nsError.h" // for NS_ERROR_NOT_INITIALIZED, etc.
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namespace mozilla {
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using namespace dom;
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// static
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already_AddRefed<ChangeAttributeTransaction>
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ChangeAttributeTransaction::Create(Element& aElement,
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nsAtom& aAttribute,
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const nsAString& aValue)
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{
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RefPtr<ChangeAttributeTransaction> transaction =
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new ChangeAttributeTransaction(aElement, aAttribute, &aValue);
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return transaction.forget();
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}
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// static
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already_AddRefed<ChangeAttributeTransaction>
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ChangeAttributeTransaction::CreateToRemove(Element& aElement,
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nsAtom& aAttribute)
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{
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RefPtr<ChangeAttributeTransaction> transaction =
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new ChangeAttributeTransaction(aElement, aAttribute, nullptr);
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return transaction.forget();
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}
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ChangeAttributeTransaction::ChangeAttributeTransaction(Element& aElement,
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nsAtom& aAttribute,
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const nsAString* aValue)
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: EditTransactionBase()
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, mElement(&aElement)
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, mAttribute(&aAttribute)
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, mValue(aValue ? *aValue : EmptyString())
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, mRemoveAttribute(!aValue)
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, mAttributeWasSet(false)
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{
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}
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ChangeAttributeTransaction::~ChangeAttributeTransaction()
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{
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}
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NS_IMPL_CYCLE_COLLECTION_INHERITED(ChangeAttributeTransaction,
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EditTransactionBase,
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mElement)
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NS_IMPL_ADDREF_INHERITED(ChangeAttributeTransaction, EditTransactionBase)
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NS_IMPL_RELEASE_INHERITED(ChangeAttributeTransaction, EditTransactionBase)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ChangeAttributeTransaction)
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NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase)
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NS_IMETHODIMP
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ChangeAttributeTransaction::DoTransaction()
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{
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// Need to get the current value of the attribute and save it, and set
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// mAttributeWasSet
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mAttributeWasSet = mElement->GetAttr(kNameSpaceID_None, mAttribute,
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mUndoValue);
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// XXX: hack until attribute-was-set code is implemented
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if (!mUndoValue.IsEmpty()) {
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mAttributeWasSet = true;
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}
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// XXX: end hack
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// Now set the attribute to the new value
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if (mRemoveAttribute) {
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return mElement->UnsetAttr(kNameSpaceID_None, mAttribute, true);
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}
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return mElement->SetAttr(kNameSpaceID_None, mAttribute, mValue, true);
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}
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NS_IMETHODIMP
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ChangeAttributeTransaction::UndoTransaction()
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{
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if (mAttributeWasSet) {
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return mElement->SetAttr(kNameSpaceID_None, mAttribute, mUndoValue, true);
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}
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return mElement->UnsetAttr(kNameSpaceID_None, mAttribute, true);
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}
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NS_IMETHODIMP
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ChangeAttributeTransaction::RedoTransaction()
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{
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if (mRemoveAttribute) {
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return mElement->UnsetAttr(kNameSpaceID_None, mAttribute, true);
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}
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return mElement->SetAttr(kNameSpaceID_None, mAttribute, mValue, true);
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}
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} // namespace mozilla
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