Add a basic custom painting facility to Sky

sky/engine/core/dom/Element.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003-2011, 2013, 2014 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 33 matching lines @@
 class ClientRect;
 class ClientRectList;
 class DOMTokenList;
 class Document;
 class ElementRareData;
 class ElementShadow;
 class ExceptionState;
 class Image;
 class IntSize;
 class MutableStylePropertySet;
+class PaintingCallback;
 class PropertySetCSSStyleDeclaration;
 class PseudoElement;
 class ShadowRoot;
 class StylePropertySet;
 
 enum SpellcheckAttributeState {
     SpellcheckAttributeTrue,
     SpellcheckAttributeFalse,
     SpellcheckAttributeDefault
 };
@@ skipping 55 matching lines @@
 
     Element* offsetParent();
     int clientLeft();
     int clientTop();
     int clientWidth();
     int clientHeight();
 
     PassRefPtr<ClientRectList> getClientRects();
     PassRefPtr<ClientRect> getBoundingClientRect();
 
+    void requestPaint(PassOwnPtr<PaintingCallback>);
+
     virtual void didMoveToNewDocument(Document&) override;
 
     CSSStyleDeclaration* style();
 
     const QualifiedName& tagQName() const { return m_tagName; }
     String tagName() const { return nodeName(); }
 
     bool hasTagName(const QualifiedName& tagName) const { return m_tagName == tagName; }
 
     // A fast function for checking the local name against another atomic string.
@@ skipping 414 matching lines @@
     static PassRefPtr<T> create(const QualifiedName&, Document&)
 #define DEFINE_ELEMENT_FACTORY_WITH_TAGNAME(T) \
     PassRefPtr<T> T::create(const QualifiedName& tagName, Document& document) \
     { \
         return adoptRef(new T(tagName, document)); \
     }
 
 } // namespace
 
 #endif  // SKY_ENGINE_CORE_DOM_ELEMENT_H_