1 files changed, 60 insertions, 0 deletions
diff --git a/editor/libeditor/SetDocumentTitleTransaction.h b/editor/libeditor/SetDocumentTitleTransaction.h
new file mode 100644
index 0000000000..0f17fe8d23
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+++ b/editor/libeditor/SetDocumentTitleTransaction.h
@@ -0,0 +1,60 @@
+/* -*- 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/. */
+
+#ifndef SetDocumentTitleTransaction_h
+#define SetDocumentTitleTransaction_h
+
+#include "mozilla/EditTransactionBase.h" // for EditTransactionBase, etc.
+#include "nsString.h"                   // for nsString
+#include "nscore.h"                     // for NS_IMETHOD, nsAString, etc.
+
+class nsIHTMLEditor;
+
+namespace mozilla {
+
+/**
+ * A transaction that changes the document's title,
+ *  which is a text node under the <title> tag in a page's <head> section
+ * provides default concrete behavior for all nsITransaction methods.
+ */
+class SetDocumentTitleTransaction final : public EditTransactionBase
+{
+public:
+  /**
+   * Initialize the transaction.
+   * @param aEditor     The object providing core editing operations.
+   * @param aValue      The new value for document title.
+   */
+  NS_IMETHOD Init(nsIHTMLEditor* aEditor,
+                  const nsAString* aValue);
+  SetDocumentTitleTransaction();
+
+private:
+  nsresult SetDomTitle(const nsAString& aTitle);
+
+public:
+  NS_DECL_EDITTRANSACTIONBASE
+
+  NS_IMETHOD RedoTransaction() override;
+  NS_IMETHOD GetIsTransient(bool *aIsTransient) override;
+
+protected:
+
+  // The editor that created this transaction.
+  nsIHTMLEditor* mEditor;
+
+  // The new title string.
+  nsString mValue;
+
+  // The previous title string to use for undo.
+  nsString mUndoValue;
+
+  // Set true if we dont' really change the title during Do().
+  bool mIsTransient;
+};
+
+} // namespace mozilla
+
+#endif // #ifndef SetDocumentTitleTransaction_h