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/* -*- 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 "EditorDOMAPIWrapper.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(
EditorBase& aEditorBase, Element& aElement, nsAtom& aAttribute,
const nsAString& aValue) {
RefPtr<ChangeAttributeTransaction> transaction =
new ChangeAttributeTransaction(aEditorBase, aElement, aAttribute,
&aValue);
return transaction.forget();
}
// static
already_AddRefed<ChangeAttributeTransaction>
ChangeAttributeTransaction::CreateToRemove(EditorBase& aEditorBase,
Element& aElement,
nsAtom& aAttribute) {
RefPtr<ChangeAttributeTransaction> transaction =
new ChangeAttributeTransaction(aEditorBase, aElement, aAttribute,
nullptr);
return transaction.forget();
}
ChangeAttributeTransaction::ChangeAttributeTransaction(EditorBase& aEditorBase,
Element& aElement,
nsAtom& aAttribute,
const nsAString* aValue)
: EditTransactionBase(),
mEditorBase(&aEditorBase),
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")
<< ", mEditorBase=" << aTransaction.mEditorBase.get() << " }";
return aStream;
}
NS_IMPL_CYCLE_COLLECTION_INHERITED(ChangeAttributeTransaction,
EditTransactionBase, mEditorBase, 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() {
MOZ_ASSERT(mEditorBase);
// Need to get the current value of the attribute and save it, and set
// mAttributeWasSet
mAttributeWasSet = mElement->GetAttr(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()));
const OwningNonNull<EditorBase> editorBase = *mEditorBase;
const OwningNonNull<Element> element = *mElement;
// Now set the attribute to the new value
if (mRemoveAttribute) {
AutoElementAttrAPIWrapper elementWrapper(editorBase, element);
nsresult rv = elementWrapper.UnsetAttr(MOZ_KnownLive(mAttribute), true);
if (NS_FAILED(rv)) {
NS_WARNING("AutoElementAttrAPIWrapper::UnsetAttr() failed");
return rv;
}
NS_WARNING_ASSERTION(
elementWrapper.IsExpectedResult(EmptyString()),
"Removing attribute caused other mutations, but ignored");
return NS_OK;
}
AutoElementAttrAPIWrapper elementWrapper(editorBase, element);
nsresult rv = elementWrapper.SetAttr(MOZ_KnownLive(mAttribute), mValue, true);
if (NS_FAILED(rv)) {
NS_WARNING("AutoElementAttrAPIWrapper::SetAttr() failed");
return rv;
}
NS_WARNING_ASSERTION(elementWrapper.IsExpectedResult(mValue),
"Setting attribute caused other mutations, but ignored");
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(!mEditorBase) || NS_WARN_IF(!mElement)) {
return NS_ERROR_NOT_AVAILABLE;
}
const OwningNonNull<EditorBase> editorBase = *mEditorBase;
const OwningNonNull<Element> element = *mElement;
if (mAttributeWasSet) {
AutoElementAttrAPIWrapper elementWrapper(editorBase, element);
nsresult rv =
elementWrapper.SetAttr(MOZ_KnownLive(mAttribute), mUndoValue, true);
if (NS_FAILED(rv)) {
NS_WARNING("AutoElementAttrAPIWrapper::SetAttr() failed");
return rv;
}
NS_WARNING_ASSERTION(
elementWrapper.IsExpectedResult(mUndoValue),
"Setting attribute caused other mutations, but ignored");
return NS_OK;
}
AutoElementAttrAPIWrapper elementWrapper(editorBase, element);
nsresult rv = elementWrapper.UnsetAttr(MOZ_KnownLive(mAttribute), true);
if (NS_FAILED(rv)) {
NS_WARNING("AutoElementAttrAPIWrapper::UnsetAttr() failed");
return rv;
}
NS_WARNING_ASSERTION(
elementWrapper.IsExpectedResult(EmptyString()),
"Removing attribute caused other mutations, but ignored");
return NS_OK;
}
NS_IMETHODIMP ChangeAttributeTransaction::RedoTransaction() {
MOZ_LOG(GetLogModule(), LogLevel::Info,
("%p ChangeAttributeTransaction::%s this=%s", this, __FUNCTION__,
ToString(*this).c_str()));
if (NS_WARN_IF(!mEditorBase) || NS_WARN_IF(!mElement)) {
return NS_ERROR_NOT_AVAILABLE;
}
const OwningNonNull<EditorBase> editorBase = *mEditorBase;
const OwningNonNull<Element> element = *mElement;
if (mRemoveAttribute) {
AutoElementAttrAPIWrapper elementWrapper(editorBase, element);
nsresult rv = elementWrapper.UnsetAttr(MOZ_KnownLive(mAttribute), true);
if (NS_FAILED(rv)) {
NS_WARNING("AutoElementAttrAPIWrapper::UnsetAttr() failed");
return rv;
}
NS_WARNING_ASSERTION(
elementWrapper.IsExpectedResult(EmptyString()),
"Removing attribute caused other mutations, but ignored");
return NS_OK;
}
AutoElementAttrAPIWrapper elementWrapper(editorBase, element);
nsresult rv = elementWrapper.SetAttr(MOZ_KnownLive(mAttribute), mValue, true);
if (NS_FAILED(rv)) {
NS_WARNING("AutoElementAttrAPIWrapper::SetAttr() failed");
return rv;
}
NS_WARNING_ASSERTION(elementWrapper.IsExpectedResult(mValue),
"Setting attribute caused other mutations, but ignored");
return NS_OK;
}
} // namespace mozilla
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