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 "CounterContent.h"
26#include "RenderText.h"
27
28namespace WebCore {
29
30class CounterNode;
31
32class RenderCounter final : public RenderText {
33public:
34    RenderCounter(Document&, const CounterContent&);
35    virtual ~RenderCounter();
36
37    static void destroyCounterNodes(RenderObject*);
38    static void destroyCounterNode(RenderObject*, const AtomicString& identifier);
39    static void rendererSubtreeAttached(RenderObject*);
40    static void rendererRemovedFromTree(RenderObject&);
41    static void rendererStyleChanged(RenderObject*, const RenderStyle* oldStyle, const RenderStyle* newStyle);
42
43    void updateCounter();
44
45protected:
46    virtual void willBeDestroyed();
47
48private:
49    virtual const char* renderName() const;
50    virtual bool isCounter() const;
51    virtual String originalText() const;
52
53    virtual void computePreferredLogicalWidths(float leadWidth) override;
54
55    // Removes the reference to the CounterNode associated with this renderer.
56    // This is used to cause a counter display update when the CounterNode tree changes.
57    void invalidate();
58
59    CounterContent m_counter;
60    CounterNode* m_counterNode;
61    RenderCounter* m_nextForSameCounter;
62    friend class CounterNode;
63};
64
65RENDER_OBJECT_TYPE_CASTS(RenderCounter, isCounter())
66
67} // namespace WebCore
68
69#ifndef NDEBUG
70// Outside the WebCore namespace for ease of invocation from gdb.
71void showCounterRendererTree(const WebCore::RenderObject*, const char* counterName = 0);
72#endif
73
74#endif // RenderCounter_h
75