Rename/move counter rendering code to layout.

Source/core/rendering/CounterNode.h

-/*
- * Copyright (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
- * Copyright (C) 2006, 2007 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
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public License
- * along with this library; see the file COPYING.LIB.  If not, write to
- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- *
-*/
-
-#ifndef CounterNode_h
-#define CounterNode_h
-
-#include "wtf/Forward.h"
-#include "wtf/Noncopyable.h"
-#include "wtf/RefCounted.h"
-
-// This implements a counter tree that is used for finding parents in counters() lookup,
-// and for propagating count changes when nodes are added or removed.
-
-// Parents represent unique counters and their scope, which are created either explicitly
-// by "counter-reset" style rules or implicitly by referring to a counter that is not in scope.
-// Such nodes are tagged as "reset" nodes, although they are not all due to "counter-reset".
-
-// Not that render tree children are often counter tree siblings due to counter scoping rules.
-
-namespace blink {
-
-class RenderObject;
-class RenderCounter;
-
-class CounterNode : public RefCounted<CounterNode> {
-public:
-    static PassRefPtr<CounterNode> create(RenderObject&, bool isReset, int value);
-    ~CounterNode();
-    bool actsAsReset() const { return m_hasResetType || !m_parent; }
-    bool hasResetType() const { return m_hasResetType; }
-    int value() const { return m_value; }
-    int countInParent() const { return m_countInParent; }
-    RenderObject& owner() const { return m_owner; }
-    void addRenderer(RenderCounter*);
-    void removeRenderer(RenderCounter*);
-
-    // Invalidates the text in the renderers of this counter, if any.
-    void resetRenderers();
-
-    CounterNode* parent() const { return m_parent; }
-    CounterNode* previousSibling() const { return m_previousSibling; }
-    CounterNode* nextSibling() const { return m_nextSibling; }
-    CounterNode* firstChild() const { return m_firstChild; }
-    CounterNode* lastChild() const { return m_lastChild; }
-    CounterNode* lastDescendant() const;
-    CounterNode* previousInPreOrder() const;
-    CounterNode* nextInPreOrder(const CounterNode* stayWithin = 0) const;
-    CounterNode* nextInPreOrderAfterChildren(const CounterNode* stayWithin = 0) const;
-
-    void insertAfter(CounterNode* newChild, CounterNode* beforeChild, const AtomicString& identifier);
-
-    // identifier must match the identifier of this counter.
-    void removeChild(CounterNode*);
-
-private:
-    CounterNode(RenderObject&, bool isReset, int value);
-    int computeCountInParent() const;
-    // Invalidates the text in the renderer of this counter, if any,
-    // and in the renderers of all descendants of this counter, if any.
-    void resetThisAndDescendantsRenderers();
-    void recount();
-
-    bool m_hasResetType;
-    int m_value;
-    int m_countInParent;
-    RenderObject& m_owner;
-    RenderCounter* m_rootRenderer;
-
-    CounterNode* m_parent;
-    CounterNode* m_previousSibling;
-    CounterNode* m_nextSibling;
-    CounterNode* m_firstChild;
-    CounterNode* m_lastChild;
-};
-
-} // namespace blink
-
-#ifndef NDEBUG
-// Outside the WebCore namespace for ease of invocation from gdb.
-void showCounterTree(const blink::CounterNode*);
-#endif
-
-#endif // CounterNode_h