Introduce InsertIncrementalTextCommand to respect existing style for composition

third_party/WebKit/Source/core/editing/commands/InsertIncrementalTextCommand.h

+// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef InsertIncrementalTextCommand_h
+#define InsertIncrementalTextCommand_h
+
+#include "core/editing/commands/CompositeEditCommand.h"
+
+namespace blink {
+
+class InsertIncrementalTextCommand final : public CompositeEditCommand {
+ public:
+  enum RebalanceType {
+    RebalanceLeadingAndTrailingWhitespaces,
+    RebalanceAllWhitespaces
+  };
+
+  static InsertIncrementalTextCommand* create(
+      Document& document,
+      const String& text,
+      bool selectInsertedText = false,
+      RebalanceType rebalanceType = RebalanceLeadingAndTrailingWhitespaces) {
+    return new InsertIncrementalTextCommand(document, text, selectInsertedText,
+                                            rebalanceType);
+  }
+
+  String textDataForInputEvent() const final;
+
+ private:
+  InsertIncrementalTextCommand(Document&,
+                               const String& text,
+                               bool selectInsertedText,
+                               RebalanceType);
+
+  void doApply(EditingState*) override;
+
+  Position positionInsideTextNode(const Position&, EditingState*);
+  Position insertTab(const Position&, EditingState*);
+
+  bool performTrivialReplace(const String&, bool selectInsertedText);
+  bool performOverwrite(const String&, bool selectInsertedText);
+  void setEndingSelectionWithoutValidation(const Position& startPosition,
+                                           const Position& endPosition);
+
+  void setSelection(const size_t start, const size_t end, LocalFrame*);
+
+  friend class TypingCommand;
+
+  String m_text;
+  bool m_selectInsertedText;
+  RebalanceType m_rebalanceType;
+};
+
+}  // namespace blink
+
+#endif  // InsertIncrementalTextCommand_h