1/*
2 * Copyright (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
3 * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB.  If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 *
20 */
21
22#ifndef RenderCounter_h
23#define RenderCounter_h
24
25#include "core/rendering/RenderText.h"
26#include "core/rendering/style/CounterContent.h"
27
28namespace blink {
29
30class CounterNode;
31
32class RenderCounter FINAL : public RenderText {
33public:
34    RenderCounter(Document*, const CounterContent&);
35    virtual ~RenderCounter();
36    virtual void destroy() OVERRIDE;
37
38    static void destroyCounterNodes(RenderObject&);
39    static void destroyCounterNode(RenderObject&, const AtomicString& identifier);
40    static void rendererSubtreeAttached(RenderObject*);
41    static void rendererRemovedFromTree(RenderObject*);
42    static void rendererStyleChanged(RenderObject&, const RenderStyle* oldStyle, const RenderStyle* newStyle);
43
44    void updateCounter();
45
46protected:
47    virtual void willBeDestroyed() OVERRIDE;
48
49private:
50    virtual const char* renderName() const OVERRIDE;
51    virtual bool isCounter() const OVERRIDE;
52    virtual PassRefPtr<StringImpl> originalText() const OVERRIDE;
53
54    // Removes the reference to the CounterNode associated with this renderer.
55    // This is used to cause a counter display update when the CounterNode tree changes.
56    void invalidate();
57
58    CounterContent m_counter;
59    CounterNode* m_counterNode;
60    RenderCounter* m_nextForSameCounter;
61    friend class CounterNode;
62};
63
64DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderCounter, isCounter());
65
66} // namespace blink
67
68#ifndef NDEBUG
69// Outside the WebCore namespace for ease of invocation from gdb.
70void showCounterRendererTree(const blink::RenderObject*, const char* counterName = 0);
71#endif
72
73#endif // RenderCounter_h
74