projects / iphone-api.git / blame
| Commit | Line | Data |
|---|---|---|
| a90939db JF |
1 | /* |
| 2 | * Copyright (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com) | |
| 3 | * Copyright (C) 2006, 2007 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 CounterNode_h | |
| 23 | #define CounterNode_h | |
| 24 | ||
| 25 | #include <wtf/Noncopyable.h> | |
| 26 | ||
| 27 | // This implements a counter tree that is used for finding parents in counters() lookup, | |
| 28 | // and for propagating count changes when nodes are added or removed. | |
| 29 | ||
| 30 | // Parents represent unique counters and their scope, which are created either explicitly | |
| 31 | // by "counter-reset" style rules or implicitly by referring to a counter that is not in scope. | |
| 32 | // Such nodes are tagged as "reset" nodes, although they are not all due to "counter-reset". | |
| 33 | ||
| 34 | // Not that render tree children are often counter tree siblings due to counter scoping rules. | |
| 35 | ||
| 36 | namespace WebCore { | |
| 37 | ||
| 38 | class RenderObject; | |
| 39 | ||
| 40 | class CounterNode : Noncopyable { | |
| 41 | public: | |
| 42 | CounterNode(RenderObject*, bool isReset, int value); | |
| 43 | ||
| 44 | bool isReset() const { return m_isReset; } | |
| 45 | int value() const { return m_value; } | |
| 46 | int countInParent() const { return m_countInParent; } | |
| 47 | RenderObject* renderer() const { return m_renderer; } | |
| 48 | ||
| 49 | CounterNode* parent() const { return m_parent; } | |
| 50 | CounterNode* previousSibling() const { return m_previousSibling; } | |
| 51 | CounterNode* nextSibling() const { return m_nextSibling; } | |
| 52 | CounterNode* firstChild() const { return m_firstChild; } | |
| 53 | CounterNode* lastChild() const { return m_lastChild; } | |
| 54 | ||
| 55 | void insertAfter(CounterNode* newChild, CounterNode* beforeChild); | |
| 56 | void removeChild(CounterNode*); | |
| 57 | ||
| 58 | private: | |
| 59 | int computeCountInParent() const; | |
| 60 | void recount(); | |
| 61 | ||
| 62 | bool m_isReset; | |
| 63 | int m_value; | |
| 64 | int m_countInParent; | |
| 65 | RenderObject* m_renderer; | |
| 66 | ||
| 67 | CounterNode* m_parent; | |
| 68 | CounterNode* m_previousSibling; | |
| 69 | CounterNode* m_nextSibling; | |
| 70 | CounterNode* m_firstChild; | |
| 71 | CounterNode* m_lastChild; | |
| 72 | }; | |
| 73 | ||
| 74 | } // namespace WebCore | |
| 75 | ||
| 76 | #ifndef NDEBUG | |
| 77 | // Outside the WebCore namespace for ease of invocation from gdb. | |
| 78 | void showTree(const WebCore::CounterNode*); | |
| 79 | #endif | |
| 80 | ||
| 81 | #endif // CounterNode_h |