Remove the concept of document.documentElement

sky/engine/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 255 matching lines @@
 {
     if (m_frame.selection().isNone())
         return;
 
     ASSERT(m_frame.document());
     DeleteSelectionCommand::create(*m_frame.document(), smartDelete)->apply();
 }
 
 void Editor::pasteAsPlainText(const String& pastingText, bool smartReplace)
 {
-    Element* target = findEventTargetFromSelection();
+    ContainerNode* target = findEventTargetFromSelection();
     if (!target)
         return;
     target->dispatchEvent(TextEvent::createForPlainTextPaste(m_frame.domWindow(), pastingText, smartReplace), IGNORE_EXCEPTION);
 }
 
 void Editor::pasteAsFragment(PassRefPtr<DocumentFragment> pastingFragment, bool smartReplace, bool matchStyle)
 {
-    Element* target = findEventTargetFromSelection();
+    ContainerNode* target = findEventTargetFromSelection();
     if (!target)
         return;
     target->dispatchEvent(TextEvent::createForFragmentPaste(m_frame.domWindow(), pastingFragment, smartReplace, matchStyle), IGNORE_EXCEPTION);
 }
 
 bool Editor::tryDHTMLCopy()
 {
     return false;
 }
 
@@ skipping 50 matching lines @@
 {
     spellChecker().updateMarkersForWordsAffectedByEditing(true);
     client().respondToChangedContents();
 }
 
 void Editor::clearLastEditCommand()
 {
     m_lastEditCommand.clear();
 }
 
-Element* Editor::findEventTargetFrom(const VisibleSelection& selection) const
+ContainerNode* Editor::findEventTargetFrom(const VisibleSelection& selection) const
 {
-    Element* target = selection.start().element();
-    if (!target)
-        target = m_frame.document()->documentElement();
-
-    return target;
+    if (Element* target = selection.start().element())
+        return target;
+    return m_frame.document();
 }
 
-Element* Editor::findEventTargetFromSelection() const
+ContainerNode* Editor::findEventTargetFromSelection() const
 {
     return findEventTargetFrom(m_frame.selection().selection());
 }
 
 static void dispatchEditableContentChangedEvents(PassRefPtr<Element> startRoot, PassRefPtr<Element> endRoot)
 {
     if (startRoot)
         startRoot->dispatchEvent(Event::create(EventTypeNames::webkitEditableContentChanged), IGNORE_EXCEPTION);
     if (endRoot && endRoot != startRoot)
         endRoot->dispatchEvent(Event::create(EventTypeNames::webkitEditableContentChanged), IGNORE_EXCEPTION);
@@ skipping 440 matching lines @@
     return m_frame.spellChecker();
 }
 
 void Editor::toggleOverwriteModeEnabled()
 {
     m_overwriteModeEnabled = !m_overwriteModeEnabled;
     frame().selection().setShouldShowBlockCursor(m_overwriteModeEnabled);
 }
 
 } // namespace blink