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Diffstat (limited to '')
| -rw-r--r-- | editor/libeditor/ChangeAttributeTransaction.cpp | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/editor/libeditor/ChangeAttributeTransaction.cpp b/editor/libeditor/ChangeAttributeTransaction.cpp new file mode 100644 index 0000000000..1e57c94267 --- /dev/null +++ b/editor/libeditor/ChangeAttributeTransaction.cpp @@ -0,0 +1,143 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "ChangeAttributeTransaction.h" + +#include "mozilla/Logging.h" +#include "mozilla/ToString.h" +#include "mozilla/dom/Element.h" // for Element + +#include "nsAString.h" +#include "nsError.h" // for NS_ERROR_NOT_INITIALIZED, etc. + +namespace mozilla { + +using namespace dom; + +// static +already_AddRefed<ChangeAttributeTransaction> ChangeAttributeTransaction::Create( + Element& aElement, nsAtom& aAttribute, const nsAString& aValue) { + RefPtr<ChangeAttributeTransaction> transaction = + new ChangeAttributeTransaction(aElement, aAttribute, &aValue); + return transaction.forget(); +} + +// static +already_AddRefed<ChangeAttributeTransaction> +ChangeAttributeTransaction::CreateToRemove(Element& aElement, + nsAtom& aAttribute) { + RefPtr<ChangeAttributeTransaction> transaction = + new ChangeAttributeTransaction(aElement, aAttribute, nullptr); + return transaction.forget(); +} + +ChangeAttributeTransaction::ChangeAttributeTransaction(Element& aElement, + nsAtom& aAttribute, + const nsAString* aValue) + : EditTransactionBase(), + mElement(&aElement), + mAttribute(&aAttribute), + mValue(aValue ? *aValue : u""_ns), + mRemoveAttribute(!aValue), + mAttributeWasSet(false) {} + +std::ostream& operator<<(std::ostream& aStream, + const ChangeAttributeTransaction& aTransaction) { + aStream << "{ mElement=" << aTransaction.mElement.get(); + if (aTransaction.mElement) { + aStream << " (" << *aTransaction.mElement << ")"; + } + aStream << ", mAttribute=" << nsAtomCString(aTransaction.mAttribute).get() + << ", mValue=\"" << NS_ConvertUTF16toUTF8(aTransaction.mValue).get() + << "\", mUndoValue=\"" + << NS_ConvertUTF16toUTF8(aTransaction.mUndoValue).get() + << "\", mRemoveAttribute=" + << (aTransaction.mRemoveAttribute ? "true" : "false") + << ", mAttributeWasSet=" + << (aTransaction.mAttributeWasSet ? "true" : "false") << " }"; + return aStream; +} + +NS_IMPL_CYCLE_COLLECTION_INHERITED(ChangeAttributeTransaction, + EditTransactionBase, mElement) + +NS_IMPL_ADDREF_INHERITED(ChangeAttributeTransaction, EditTransactionBase) +NS_IMPL_RELEASE_INHERITED(ChangeAttributeTransaction, EditTransactionBase) +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ChangeAttributeTransaction) +NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase) + +NS_IMETHODIMP ChangeAttributeTransaction::DoTransaction() { + // Need to get the current value of the attribute and save it, and set + // mAttributeWasSet + mAttributeWasSet = + mElement->GetAttr(kNameSpaceID_None, mAttribute, mUndoValue); + + // XXX: hack until attribute-was-set code is implemented + if (!mUndoValue.IsEmpty()) { + mAttributeWasSet = true; + } + // XXX: end hack + + MOZ_LOG(GetLogModule(), LogLevel::Info, + ("%p ChangeAttributeTransaction::%s this=%s", this, __FUNCTION__, + ToString(*this).c_str())); + + // Now set the attribute to the new value + if (mRemoveAttribute) { + OwningNonNull<Element> element = *mElement; + nsresult rv = element->UnsetAttr(kNameSpaceID_None, mAttribute, true); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Element::UnsetAttr() failed"); + return rv; + } + + OwningNonNull<Element> element = *mElement; + nsresult rv = element->SetAttr(kNameSpaceID_None, mAttribute, mValue, true); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Element::SetAttr() failed"); + return rv; +} + +NS_IMETHODIMP ChangeAttributeTransaction::UndoTransaction() { + MOZ_LOG(GetLogModule(), LogLevel::Info, + ("%p ChangeAttributeTransaction::%s this=%s", this, __FUNCTION__, + ToString(*this).c_str())); + + if (NS_WARN_IF(!mElement)) { + return NS_ERROR_NOT_AVAILABLE; + } + if (mAttributeWasSet) { + OwningNonNull<Element> element = *mElement; + nsresult rv = + element->SetAttr(kNameSpaceID_None, mAttribute, mUndoValue, true); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Element::SetAttr() failed"); + return rv; + } + OwningNonNull<Element> element = *mElement; + nsresult rv = element->UnsetAttr(kNameSpaceID_None, mAttribute, true); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Element::UnsetAttr() failed"); + return rv; +} + +NS_IMETHODIMP ChangeAttributeTransaction::RedoTransaction() { + MOZ_LOG(GetLogModule(), LogLevel::Info, + ("%p ChangeAttributeTransaction::%s this=%s", this, __FUNCTION__, + ToString(*this).c_str())); + + if (NS_WARN_IF(!mElement)) { + return NS_ERROR_NOT_AVAILABLE; + } + if (mRemoveAttribute) { + OwningNonNull<Element> element = *mElement; + nsresult rv = element->UnsetAttr(kNameSpaceID_None, mAttribute, true); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Element::UnsetAttr() failed"); + return rv; + } + + OwningNonNull<Element> element = *mElement; + nsresult rv = element->SetAttr(kNameSpaceID_None, mAttribute, mValue, true); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Element::SetAttr() failed"); + return rv; +} + +} // namespace mozilla |