Make first-letter style to work with editing

Source/core/dom/PositionIterator.cpp

 /*
  * Copyright (C) 2007, 2008 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 13 matching lines @@
  */
 
 #include "config.h"
 #include "core/dom/PositionIterator.h"
 
 #include "HTMLNames.h"
 #include "core/dom/Node.h"
 #include "core/editing/htmlediting.h"
 #include "core/html/HTMLHtmlElement.h"
 #include "core/rendering/RenderBlock.h"
+#include "core/rendering/RenderTextFragment.h"
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 PositionIterator::operator Position() const
 {
     if (m_nodeAfterPositionInAnchor) {
         ASSERT(m_nodeAfterPositionInAnchor->parentNode() == m_anchorNode);
         // FIXME: This check is inadaquete because any ancestor could be ignored by editing
@@ skipping 52 matching lines @@
     } else {
         if (m_offsetInAnchor)
             m_offsetInAnchor = Position::uncheckedPreviousOffset(m_anchorNode, m_offsetInAnchor);
         else {
             m_nodeAfterPositionInAnchor = m_anchorNode;
             m_anchorNode = m_anchorNode->parentNode();
         }
     }
 }
 
+RenderObject* PositionIterator::renderer() const
+{
+    if (!m_anchorNode)
+        return 0;
+    Position pos = *this;
+    return pos.renderer();
+}
+
 bool PositionIterator::atStart() const
 {
     if (!m_anchorNode)
         return true;
     if (m_anchorNode->parentNode())
         return false;
     return (!m_anchorNode->hasChildNodes() && !m_offsetInAnchor) || (m_nodeAfterPositionInAnchor && !m_nodeAfterPositionInAnchor->previousSibling());
 }
 
 bool PositionIterator::atEnd() const
@@ skipping 21 matching lines @@
     if (m_nodeAfterPositionInAnchor)
         return false;
     return m_anchorNode->hasChildNodes() || m_offsetInAnchor >= lastOffsetForEditing(m_anchorNode);
 }
 
 bool PositionIterator::isCandidate() const
 {
     if (!m_anchorNode)
         return false;
 
-    RenderObject* renderer = m_anchorNode->renderer();
+    RenderObject* renderer = this->renderer();
     if (!renderer)
         return false;
 
     if (renderer->style()->visibility() != VISIBLE)
         return false;
 
     if (renderer->isBR())
         return !m_offsetInAnchor && !Position::nodeIsUserSelectNone(m_anchorNode->parentNode());
 
     if (renderer->isText())
         return !Position::nodeIsUserSelectNone(m_anchorNode) && Position(*this).inRenderedText();
 
     if (isTableElement(m_anchorNode) || editingIgnoresContent(m_anchorNode))
         return (atStartOfNode() || atEndOfNode()) && !Position::nodeIsUserSelectNone(m_anchorNode->parentNode());
 
     if (!isHTMLHtmlElement(m_anchorNode) && renderer->isBlockFlow()) {
         if (toRenderBlock(renderer)->logicalHeight() || m_anchorNode->hasTagName(bodyTag)) {
             if (!Position::hasRenderedNonAnonymousDescendantsWithHeight(renderer))
                 return atStartOfNode() && !Position::nodeIsUserSelectNone(m_anchorNode);
             return m_anchorNode->rendererIsEditable() && !Position::nodeIsUserSelectNone(m_anchorNode) && Position(*this).atEditingBoundary();
         }
     }
 
     return false;
 }
 
 } // namespace WebCore