1 files changed, 95 insertions, 0 deletions
diff --git a/editor/libeditor/ReplaceTextTransaction.h b/editor/libeditor/ReplaceTextTransaction.h
new file mode 100644
index 0000000000..f7bfba5dbe
--- /dev/null
+++ b/editor/libeditor/ReplaceTextTransaction.h
@@ -0,0 +1,95 @@
+/* -*- 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 ReplaceTextTransaction_h
+#define ReplaceTextTransaction_h
+
+#include "EditorBase.h"
+#include "EditorDOMPoint.h"
+#include "EditorForwards.h"
+#include "EditTransactionBase.h"
+
+#include "mozilla/Attributes.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/RefPtr.h"
+#include "mozilla/dom/Text.h"
+#include "nsDebug.h"
+#include "nsString.h"
+
+namespace mozilla {
+
+class ReplaceTextTransaction final : public EditTransactionBase {
+ private:
+  ReplaceTextTransaction(EditorBase& aEditorBase,
+                         const nsAString& aStringToInsert, dom::Text& aTextNode,
+                         uint32_t aStartOffset, uint32_t aLength)
+      : mEditorBase(&aEditorBase),
+        mTextNode(&aTextNode),
+        mStringToInsert(aStringToInsert),
+        mOffset(aStartOffset) {
+    if (aLength) {
+      IgnoredErrorResult ignoredError;
+      mTextNode->SubstringData(mOffset, aLength, mStringToBeReplaced,
+                               ignoredError);
+      NS_WARNING_ASSERTION(
+          !ignoredError.Failed(),
+          "Failed to initialize ReplaceTextTransaction::mStringToBeReplaced, "
+          "but ignored");
+    }
+  }
+
+  virtual ~ReplaceTextTransaction() = default;
+
+ public:
+  static already_AddRefed<ReplaceTextTransaction> Create(
+      EditorBase& aEditorBase, const nsAString& aStringToInsert,
+      dom::Text& aTextNode, uint32_t aStartOffset, uint32_t aLength) {
+    MOZ_ASSERT(aLength > 0, "Use InsertTextTransaction instead");
+    MOZ_ASSERT(!aStringToInsert.IsEmpty(), "Use DeleteTextTransaction instead");
+    MOZ_ASSERT(aTextNode.Length() >= aStartOffset);
+    MOZ_ASSERT(aTextNode.Length() >= aStartOffset + aLength);
+
+    RefPtr<ReplaceTextTransaction> transaction = new ReplaceTextTransaction(
+        aEditorBase, aStringToInsert, aTextNode, aStartOffset, aLength);
+    return transaction.forget();
+  }
+
+  ReplaceTextTransaction() = delete;
+  ReplaceTextTransaction(const ReplaceTextTransaction&) = delete;
+  ReplaceTextTransaction& operator=(const ReplaceTextTransaction&) = delete;
+
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(ReplaceTextTransaction,
+                                           EditTransactionBase)
+
+  NS_DECL_EDITTRANSACTIONBASE
+  NS_DECL_EDITTRANSACTIONBASE_GETASMETHODS_OVERRIDE(ReplaceTextTransaction)
+
+  MOZ_CAN_RUN_SCRIPT NS_IMETHOD RedoTransaction() final;
+
+  template <typename EditorDOMPointType>
+  EditorDOMPointType SuggestPointToPutCaret() const {
+    if (NS_WARN_IF(!mTextNode)) {
+      return EditorDOMPointType();
+    }
+    return EditorDOMPointType(mTextNode, mOffset + mStringToInsert.Length());
+  }
+
+  friend std::ostream& operator<<(std::ostream& aStream,
+                                  const ReplaceTextTransaction& aTransaction);
+
+ private:
+  RefPtr<EditorBase> mEditorBase;
+  RefPtr<dom::Text> mTextNode;
+
+  nsString mStringToInsert;
+  nsString mStringToBeReplaced;
+
+  uint32_t mOffset;
+};
+
+}  // namespace mozilla
+
+#endif  // #ifndef ReplaceTextTransaction_