Convert first letter into a pseudo element.

Source/core/dom/PseudoElement.h

 /*
  * Copyright (C) 2012 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 14 matching lines @@
  */
 
 #ifndef PseudoElement_h
 #define PseudoElement_h
 
 #include "core/dom/Element.h"
 #include "core/rendering/style/RenderStyle.h"
 
 namespace blink {
 
+class RenderTextFragment;
+
 class PseudoElement FINAL : public Element {
 public:
     static PassRefPtrWillBeRawPtr<PseudoElement> create(Element* parent, PseudoId pseudoId)
     {
         return adoptRefWillBeNoop(new PseudoElement(parent, pseudoId));
     }
 
     virtual PassRefPtr<RenderStyle> customStyleForRenderer() OVERRIDE;
     virtual void attach(const AttachContext& = AttachContext()) OVERRIDE;
     virtual bool rendererIsNeeded(const RenderStyle&) OVERRIDE;
 
     virtual bool canStartSelection() const OVERRIDE { return false; }
     virtual bool canContainRangeEndPoint() const OVERRIDE { return false; }
     virtual PseudoId pseudoId() const OVERRIDE { return m_pseudoId; }
 
     static String pseudoElementNameForEvents(PseudoId);
 
     void dispose();
 
+    void setRemainingTextRenderer(RenderTextFragment* fragment) { m_remainingTextRenderer = fragment; }
+    RenderTextFragment* remainingTextRenderer() const { return m_remainingTextRenderer; }
+
 private:
     PseudoElement(Element*, PseudoId);
+    void attachFirstLetterTextRenderers();
+    RenderStyle* styleForFirstLetter(RenderObject*);
 
     virtual void didRecalcStyle(StyleRecalcChange) OVERRIDE;
 
     PseudoId m_pseudoId;
+    RenderTextFragment* m_remainingTextRenderer;

[Julien - ping for review, 2014/10/01 21:14:47]

This screams adding a specialized class and so is the FirstLetterHelper class
that should just be added to the new class IMHO.

[dsinclair, 2014/10/04 02:01:34]

Done.

 };
 
 const QualifiedName& pseudoElementTagName();
 
 inline bool pseudoElementRendererIsNeeded(const RenderStyle* style)
 {
-    return style && style->display() != NONE && (style->styleType() == BACKDROP || style->contentData());
+    if (!style)
+        return false;
+    if (style->display() == NONE)
+        return false;
+    if (style->styleType() == FIRST_LETTER)
+        return true;
+    if (style->styleType() == BACKDROP)
+        return true;
+    if (style->contentData())
+        return true;
+    return false;
 }
 
 DEFINE_ELEMENT_TYPE_CASTS(PseudoElement, isPseudoElement());
 
 } // namespace
 
 #endif