1 /* 2 * Copyright (C) 2007 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef LayoutState_h 27 #define LayoutState_h 28 29 #include "IntRect.h" 30 #include "IntSize.h" 31 #include <wtf/Noncopyable.h> 32 33 namespace WebCore { 34 35 class RenderArena; 36 class RenderBox; 37 class RenderObject; 38 39 class LayoutState : Noncopyable { 40 public: LayoutState()41 LayoutState() 42 : m_clipped(false) 43 , m_next(0) 44 #ifndef NDEBUG 45 , m_renderer(0) 46 #endif 47 { 48 } 49 50 LayoutState(LayoutState*, RenderBox*, const IntSize& offset); 51 LayoutState(RenderObject*); 52 53 void destroy(RenderArena*); 54 55 // Overloaded new operator. 56 void* operator new(size_t, RenderArena*) throw(); 57 58 // Overridden to prevent the normal delete from being called. 59 void operator delete(void*, size_t); 60 61 private: 62 // The normal operator new is disallowed. 63 void* operator new(size_t) throw(); 64 65 public: 66 bool m_clipped; 67 IntRect m_clipRect; 68 IntSize m_offset; // x/y offset from container. 69 IntSize m_layoutDelta; // Transient offset from the final position of the object 70 // used to ensure that repaints happen in the correct place. 71 // This is a total delta accumulated from the root. 72 LayoutState* m_next; 73 #ifndef NDEBUG 74 RenderObject* m_renderer; 75 #endif 76 }; 77 78 } // namespace WebCore 79 80 #endif // LayoutState_h 81