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
28 namespace WebCore {
29
30 class CounterNode;
31
32 class RenderCounter : public RenderText {
33 public:
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 private:
44 virtual const char* renderName() const;
45 virtual bool isCounter() const;
46 virtual PassRefPtr<StringImpl> originalText() const;
47
48 virtual void computePreferredLogicalWidths(float leadWidth);
49
50 // Removes the reference to the CounterNode associated with this renderer.
51 // This is used to cause a counter display update when the CounterNode tree changes.
52 void invalidate();
53
54 CounterContent m_counter;
55 CounterNode* m_counterNode;
56 RenderCounter* m_nextForSameCounter;
57 friend class CounterNode;
58 };
59
toRenderCounter(RenderObject * object)60 inline RenderCounter* toRenderCounter(RenderObject* object)
61 {
62 ASSERT(!object || object->isCounter());
63 return static_cast<RenderCounter*>(object);
64 }
65
66 // This will catch anyone doing an unnecessary cast.
67 void toRenderCounter(const RenderCounter*);
68
69 } // namespace WebCore
70
71 #ifndef NDEBUG
72 // Outside the WebCore namespace for ease of invocation from gdb.
73 void showCounterRendererTree(const WebCore::RenderObject*, const char* counterName = 0);
74 #endif
75
76 #endif // RenderCounter_h
77