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-rw-r--r--editor/libeditor/ChangeAttributeTransaction.cpp98
1 files changed, 98 insertions, 0 deletions
diff --git a/editor/libeditor/ChangeAttributeTransaction.cpp b/editor/libeditor/ChangeAttributeTransaction.cpp
new file mode 100644
index 000000000..04f539856
--- /dev/null
+++ b/editor/libeditor/ChangeAttributeTransaction.cpp
@@ -0,0 +1,98 @@
+/* -*- 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/dom/Element.h" // for Element
+
+#include "nsAString.h"
+#include "nsError.h" // for NS_ERROR_NOT_INITIALIZED, etc.
+
+namespace mozilla {
+
+using namespace dom;
+
+ChangeAttributeTransaction::ChangeAttributeTransaction(Element& aElement,
+ nsIAtom& aAttribute,
+ const nsAString* aValue)
+ : EditTransactionBase()
+ , mElement(&aElement)
+ , mAttribute(&aAttribute)
+ , mValue(aValue ? *aValue : EmptyString())
+ , mRemoveAttribute(!aValue)
+ , mAttributeWasSet(false)
+ , mUndoValue()
+{
+}
+
+ChangeAttributeTransaction::~ChangeAttributeTransaction()
+{
+}
+
+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
+
+ // Now set the attribute to the new value
+ if (mRemoveAttribute) {
+ return mElement->UnsetAttr(kNameSpaceID_None, mAttribute, true);
+ }
+
+ return mElement->SetAttr(kNameSpaceID_None, mAttribute, mValue, true);
+}
+
+NS_IMETHODIMP
+ChangeAttributeTransaction::UndoTransaction()
+{
+ if (mAttributeWasSet) {
+ return mElement->SetAttr(kNameSpaceID_None, mAttribute, mUndoValue, true);
+ }
+ return mElement->UnsetAttr(kNameSpaceID_None, mAttribute, true);
+}
+
+NS_IMETHODIMP
+ChangeAttributeTransaction::RedoTransaction()
+{
+ if (mRemoveAttribute) {
+ return mElement->UnsetAttr(kNameSpaceID_None, mAttribute, true);
+ }
+
+ return mElement->SetAttr(kNameSpaceID_None, mAttribute, mValue, true);
+}
+
+NS_IMETHODIMP
+ChangeAttributeTransaction::GetTxnDescription(nsAString& aString)
+{
+ aString.AssignLiteral("ChangeAttributeTransaction: [mRemoveAttribute == ");
+
+ if (mRemoveAttribute) {
+ aString.AppendLiteral("true] ");
+ } else {
+ aString.AppendLiteral("false] ");
+ }
+ aString += nsDependentAtomString(mAttribute);
+ return NS_OK;
+}
+
+} // namespace mozilla