Introduce InsertIncrementalTextCommand to respect existing style for composition

third_party/WebKit/Source/core/editing/Editor.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 189 matching lines @@
     return page->editorClient();
   return emptyEditorClient();
 }
 
 bool Editor::handleTextEvent(TextEvent* event) {
   // Default event handling for Drag and Drop will be handled by DragController
   // so we leave the event for it.
   if (event->isDrop())
     return false;
 
+  // Default event handling for IncrementalInsertion will be handled by
+  // TypingCommand::insertText(), so we leave the event for it.
+  if (event->isIncrementalInsertion())
+    return false;
+
   // TODO(xiaochengh): The use of updateStyleAndLayoutIgnorePendingStylesheets
   // needs to be audited.  See http://crbug.com/590369 for more details.
   m_frame->document()->updateStyleAndLayoutIgnorePendingStylesheets();
 
   if (event->isPaste()) {
     if (event->pastingFragment()) {
       replaceSelectionWithFragment(
           event->pastingFragment(), false, event->shouldSmartReplace(),
           event->shouldMatchStyle(), InputEvent::InputType::InsertFromPaste);
     } else {
@@ skipping 1440 matching lines @@
 }
 
 DEFINE_TRACE(Editor) {
   visitor->trace(m_frame);
   visitor->trace(m_lastEditCommand);
   visitor->trace(m_undoStack);
   visitor->trace(m_mark);
 }
 
 }  // namespace blink