Move Position::isRenderedCharacter() for Text node to LayoutText

Source/core/dom/Position.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2009 Apple Inc. All rights reserved.
  *
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 998 matching lines @@
     if (isNull())
         return false;
     ASSERT(isOffsetInAnchor());
     if (!anchorNode()->isTextNode())
         return false;
 
     LayoutObject* layoutObject = anchorNode()->layoutObject();
     if (!layoutObject)
         return false;
 
-    const int offset = offsetInContainerNode();
-    LayoutText* textLayoutObject = toLayoutText(layoutObject);
-    for (InlineTextBox* box = textLayoutObject->firstTextBox(); box; box = box->nextTextBox()) {
-        if (offset < static_cast<int>(box->start()) && !textLayoutObject->containsReversedText()) {
-            // The offset we're looking for is before this node
-            // this means the offset must be in content that is
-            // not laid out. Return false.
-            return false;
-        }
-        if (offset >= static_cast<int>(box->start()) && offset < static_cast<int>(box->start() + box->len()))
-            return true;
-    }
-
-    return false;
+    return toLayoutText(layoutObject)->isRenderedCharacter(offsetInContainerNode());
 }
 
 // TODO(yosin) We should move |rendersInDifferentPosition()to "htmlediting.cpp"
 // with |renderedOffsetOf()|.
 bool rendersInDifferentPosition(const Position& position1, const Position& position2)
 {
     if (position1.isNull() || position2.isNull())
         return false;
 
     LayoutObject* layoutObject = position1.anchorNode()->layoutObject();
@@ skipping 478 matching lines @@
 
 void showTree(const blink::Position* pos)
 {
     if (pos)
         pos->showTreeForThis();
     else
         fprintf(stderr, "Cannot showTree for (nil)\n");
 }
 
 #endif