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-rw-r--r--editor/libeditor/ChangeAttributeTransaction.cpp143
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